[ { "key": "QQQQ9K23", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/QQQQ9K23", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/QQQQ9K23", "type": "text/html" }, "up": { "href": "https://api.zotero.org/groups/181676/items/U5RZB9TC", "type": "application/json" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "numChildren": 0 }, "data": { "key": "QQQQ9K23", "version": 2, "parentItem": "U5RZB9TC", "itemType": "note", "note": "

Para poder utilizar en la estimación de la evolución de la frecuencia de la señal Um y poder construir la Uo

", "tags": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "8IESPQS2", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/8IESPQS2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/8IESPQS2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Leonowicz et al.", "parsedDate": "2003-06", "numChildren": 0 }, "data": { "key": "8IESPQS2", "version": 2, "itemType": "journalArticle", "title": "Advanced spectrum estimation methods for signal analysis in power electronics", "creators": [ { "creatorType": "author", "firstName": "Z.", "lastName": "Leonowicz" }, { "creatorType": "author", "firstName": "T.", "lastName": "Lobos" }, { "creatorType": "author", "firstName": "J.", "lastName": "Rezmer" } ], "abstractNote": "Modern frequency power converters generate a wide spectrum of harmonic components. Large converters systems can also generate noncharacteristic harmonics and interharmonics. Standard tools of harmonic analysis based on the Fourier transform assume that only harmonics are present and the periodicity intervals are fixed, while periodicity intervals in the presence of interharmonics are variable and very long. A novel approach to harmonic and interharmonic analysis, based on the \"subspace\" methods, is proposed. Min-norm harmonic retrieval method is an example of high-resolution eigenstructure-based methods. The Prony method as applied for signal analysis was also tested for this purpose. Both high-resolution methods do not show the disadvantages of the traditional tools and allow exact estimation of the interharmonics frequencies. To investigate the methods several experiments were performed using simulated signals, current waveforms at the output of a simulated frequency converter, and current waveforms at the output of an industrial frequency converter. For comparison, similar experiments were repeated using the fast Fourier transform (FFT). The comparison proved the superiority of the new methods. However, their computation is much more complex than FFT.", "publicationTitle": "Industrial Electronics, IEEE Transactions on", "publisher": "", "place": "", "date": "june 2003", "volume": "50", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "514 - 519", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIE.2003.812361", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0278-0046", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "FAST", "type": 1 }, { "tag": "FFT;", "type": 1 }, { "tag": "Fourier", "type": 1 }, { "tag": "Prony", "type": 1 }, { "tag": "advanced", "type": 1 }, { "tag": "analysis;", "type": 1 }, { "tag": "and", "type": 1 }, { "tag": "components;", "type": 1 }, { "tag": "conversion", "type": 1 }, { "tag": "converter;", "type": 1 }, { "tag": "converters;", "type": 1 }, { "tag": "convertors;", "type": 1 }, { "tag": "current", "type": 1 }, { "tag": "eigenfunctions;", "type": 1 }, { "tag": "eigenstructure-based", "type": 1 }, { "tag": "eigenvalues", "type": 1 }, { "tag": "electronics;", "type": 1 }, { "tag": "estimation", "type": 1 }, { "tag": "frequency", "type": 1 }, { "tag": "harmonic", "type": 1 }, { "tag": "harmonics;", "type": 1 }, { "tag": "harmonies;", "type": 1 }, { "tag": "high-resolution", "type": 1 }, { "tag": "interharmonic", "type": 1 }, { "tag": "interharmonics;", "type": 1 }, { "tag": "intervals;", "type": 1 }, { "tag": "method;", "type": 1 }, { "tag": "methods;", "type": 1 }, { "tag": "min-norm", "type": 1 }, { "tag": "noncharacteristic", "type": 1 }, { "tag": "periodicity", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "retrieval", "type": 1 }, { "tag": "signal", "type": 1 }, { "tag": "signals;", "type": 1 }, { "tag": "simulated", "type": 1 }, { "tag": "spectral", "type": 1 }, { "tag": "spectrum", "type": 1 }, { "tag": "subspace", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "transform;", "type": 1 }, { "tag": "transforms;", "type": 1 }, { "tag": "waveforms;", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "VVW6ZBG2", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/VVW6ZBG2", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/VVW6ZBG2", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Sumner et al.", "parsedDate": "2006-10", "numChildren": 0 }, "data": { "key": "VVW6ZBG2", "version": 2, "itemType": "conferencePaper", "title": "Improved Power Quality Control and Intelligent Protection for Grid Connected Power Electronic Converters, using Real Time Parameter Estimation", "creators": [ { "creatorType": "author", "firstName": "M.", "lastName": "Sumner" }, { "creatorType": "author", "firstName": "A.", "lastName": "Abusorrah" }, { "creatorType": "author", "firstName": "D.", "lastName": "Thomas" }, { "creatorType": "author", "firstName": "P.", "lastName": "Zanchetta" } ], "abstractNote": "This paper presents a method to identify power system impedance in real-time, using signals obtained from grid connected power electronic converters. The method uses wavelets to analyse the transients associated with a small disturbance imposed by the power converter, and determine the net impedance back to source. A data capture period of 5ms only is required for accurate impedance estimation, providing the possibility of ultra fast fault detection (i.e. with one half cycle). The paper describes how the method may be used to enhance operation during faults for distributed generation. This impedance estimation has potential application in renewable/distributed energy systems, STATCOM, and proposed solid state substations", "proceedingsTitle": "Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE", "conferenceName": "", "publisher": "", "place": "", "date": "oct. 2006", "eventPlace": "", "volume": "4", "issue": "", "numberOfVolumes": "", "pages": "1709 -1715", "series": "", "seriesNumber": "", "DOI": "10.1109/IAS.2006.256766", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "5", "type": 1 }, { "tag": "analysis;fault", "type": 1 }, { "tag": "connected", "type": 1 }, { "tag": "control;power", "type": 1 }, { "tag": "converters;impedance", "type": 1 }, { "tag": "convertors;power", "type": 1 }, { "tag": "detection;grid", "type": 1 }, { "tag": "electronic", "type": 1 }, { "tag": "energy", "type": 1 }, { "tag": "estimation;intelligent", "type": 1 }, { "tag": "estimation;renewable", "type": 1 }, { "tag": "impedance;real", "type": 1 }, { "tag": "location;power", "type": 1 }, { "tag": "ms;STATCOM;distributed", "type": 1 }, { "tag": "parameter", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "protection;", "type": 1 }, { "tag": "protection;power", "type": 1 }, { "tag": "quality", "type": 1 }, { "tag": "quality;power", "type": 1 }, { "tag": "state", "type": 1 }, { "tag": "substations;transient", "type": 1 }, { "tag": "supply", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "systems;fault", "type": 1 }, { "tag": "systems;solid", "type": 1 }, { "tag": "time", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "3UANES9K", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/3UANES9K", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/3UANES9K", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Kim and Kang", "parsedDate": "2011-10", "numChildren": 0 }, "data": { "key": "3UANES9K", "version": 2, "itemType": "conferencePaper", "title": "Frequency estimation algorithm based on dynamic phasor method in a power system", "creators": [ { "creatorType": "author", "firstName": "Cheol-Hun", "lastName": "Kim" }, { "creatorType": "author", "firstName": "Sang-Hee", "lastName": "Kang" } ], "abstractNote": "In this paper, a new frequency estimation algorithm based on the dynamic phasor method is proposed to increase the estimation accuracy for a signal having a varying envelope. The proposed algorithm consists of two stages: phasor estimation and frequency estimation. First, the input signal is decomposed into two components using the dynamic phasor method. Then, the two components are combined to estimate the frequency. To evaluate the performance of the proposed algorithm, amplitude change and frequency change are considered for generating test signals. The performance of the algorithm is also assessed for dynamic conditions in a single machine power system. The Electromagnetic Transients Program was used to generate voltage signals for a load increase and single phase-to-ground faults. The performance evaluation showed that the proposed algorithm accurately estimated the fundamental frequency of power system signals in the presence of amplitude modulation and frequency change. When compared with other algorithms, simulation results show that the proposed algorithm has lower frequency estimation error. Improved algorithm is expected to increase the reliability of the measurement under fault conditions.", "proceedingsTitle": "Advanced Power System Automation and Protection (APAP), 2011 International Conference on", "conferenceName": "", "publisher": "", "place": "", "date": "oct. 2011", "eventPlace": "", "volume": "1", "issue": "", "numberOfVolumes": "", "pages": "712 -717", "series": "", "seriesNumber": "", "DOI": "10.1109/APAP.2011.6180491", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "accuracy;frequency", "type": 1 }, { "tag": "algorithm;phase-to-ground", "type": 1 }, { "tag": "amplitude", "type": 1 }, { "tag": "change;dynamic", "type": 1 }, { "tag": "change;frequency", "type": 1 }, { "tag": "estimation", "type": 1 }, { "tag": "estimation;phasor", "type": 1 }, { "tag": "estimation;single", "type": 1 }, { "tag": "faults;phasor", "type": 1 }, { "tag": "machine", "type": 1 }, { "tag": "measurement;", "type": 1 }, { "tag": "method;estimation", "type": 1 }, { "tag": "phasor", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "system;frequency", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "PGAUIGRT", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/PGAUIGRT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/PGAUIGRT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Rodríguez et al.", "parsedDate": "2011", "numChildren": 0 }, "data": { "key": "PGAUIGRT", "version": 2, "itemType": "journalArticle", "title": "Multiresonant Frequency-Locked Loop for Grid Synchronization of Power Converters Under Distorted Grid Conditions", "creators": [ { "creatorType": "author", "firstName": "P.", "lastName": "Rodríguez" }, { "creatorType": "author", "firstName": "A.", "lastName": "Luna" }, { "creatorType": "author", "firstName": "I.", "lastName": "Candela" }, { "creatorType": "author", "firstName": "R.", "lastName": "Mujal" }, { "creatorType": "author", "firstName": "R.", "lastName": "Teodorescu" }, { "creatorType": "author", "firstName": "F.", "lastName": "Blaabjerg" } ], "abstractNote": "This paper presents a new multiresonant frequency-adaptive synchronization method for grid-connected power converters that allows estimating not only the positive- and negative-sequence components of the power signal at the fundamental frequency but also other sequence components at other harmonic frequencies. The proposed system is called MSOGI-FLL since it is based on both a harmonic decoupling network consisting of multiple second-order generalized integrators (MSOGIs) and a frequency-locked loop (FLL), which makes the system frequency adaptive. In this paper, the MSOGI-FLL is analyzed for single- and three-phase applications, deducing some key expressions regarding its stability and tuning. Moreover, the performance of the MSOGI-FLL is evaluated by both simulations and experiments to show its capability for detecting different harmonic components in a highly polluted grid scenario.", "publicationTitle": "IEEE Transactions on Industrial Electronics", "publisher": "", "place": "", "date": "2011", "volume": "58", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "127-138", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIE.2010.2042420", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0278-0046", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Frequency conversion", "type": 1 }, { "tag": "Frequency synchronization", "type": 1 }, { "tag": "MSOGI-FLL", "type": 1 }, { "tag": "Nonlinear distortion", "type": 1 }, { "tag": "Permission", "type": 1 }, { "tag": "Phase locked loops", "type": 1 }, { "tag": "Pollution", "type": 1 }, { "tag": "Voltage", "type": 1 }, { "tag": "distorted grid condition", "type": 1 }, { "tag": "distributed power generation", "type": 1 }, { "tag": "frequency estimation", "type": 1 }, { "tag": "frequency locked loops", "type": 1 }, { "tag": "frequency-locked loops (FLLs)", "type": 1 }, { "tag": "grid synchronization", "type": 1 }, { "tag": "grid-connected power converters", "type": 1 }, { "tag": "harmonic analysis", "type": 1 }, { "tag": "harmonic components", "type": 1 }, { "tag": "monitoring", "type": 1 }, { "tag": "multiresonant frequency adaptive synchronization method", "type": 1 }, { "tag": "multiresonant frequency locked loop", "type": 1 }, { "tag": "negative sequence component", "type": 1 }, { "tag": "positive sequence component", "type": 1 }, { "tag": "power converters", "type": 1 }, { "tag": "power convertors", "type": 1 }, { "tag": "power grids", "type": 1 }, { "tag": "synchronisation", "type": 1 }, { "tag": "synchronization", "type": 1 }, { "tag": "three-phase applications", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "X4TNGSUM", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/X4TNGSUM", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/X4TNGSUM", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Vizireanu", "parsedDate": "2011-02", "numChildren": 0 }, "data": { "key": "X4TNGSUM", "version": 2, "itemType": "journalArticle", "title": "A simple and precise real-time four point single sinusoid signals instantaneous frequency estimation method for portable DSP based instrumentation", "creators": [ { "creatorType": "author", "firstName": "Dragoş Nicolae", "lastName": "Vizireanu" } ], "abstractNote": "A simple and precise instantaneous frequency estimation method of single sinusoid signals, using four equal spaced samples, for portable DSP based instrumentation is proposed. An analytical formula is obtained. Four-point instantaneous frequency estimator is sensitive to deviation of the sampling rate and quantization noise. As a demonstration of its simplicity, by implementing the proposed algorithm, a DSP based instantaneous frequency meter was built and tested with satisfactory performance.", "publicationTitle": "Measurement", "publisher": "", "place": "", "date": "Febrero 2011", "volume": "44", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "500-502", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Measurement", "DOI": "10.1016/j.measurement.2010.11.001", "citationKey": "", "url": "http://www.sciencedirect.com/science/article/pii/S0263224110002770", "accessDate": "2013-05-15T09:02:24Z", "PMID": "", "PMCID": "", "ISSN": "0263-2241", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "ScienceDirect", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Digital signal processor", "type": 1 }, { "tag": "Instantaneous frequency estimation algorithm", "type": 1 }, { "tag": "Instrumentation", "type": 1 }, { "tag": "Single sinusoid signals", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "7Q6MPFWT", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/7Q6MPFWT", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/7Q6MPFWT", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Guo and Wu", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "7Q6MPFWT", "version": 2, "itemType": "journalArticle", "title": "Simple synchronisation technique for three-phase grid-connected distributed generation systems", "creators": [ { "creatorType": "author", "firstName": "Xiao-Qiang", "lastName": "Guo" }, { "creatorType": "author", "firstName": "Wei-Yang", "lastName": "Wu" } ], "abstractNote": "Grid synchronisation is crucial for integration of renewable energy sources and distributed generation systems into the grid. Accurate and fast estimation of the fundamental positive sequence component is a necessity for synchronisation of three-phase distributed generation systems with the grid. In this study, a simple synchronisation technique based on the real-complex-coefficient filters is proposed. It has a very simple structure, and can directly estimate the fundamental positive and negative sequences under the distorted, unbalanced and offset conditions with no need of a phase-locked loop. Furthermore, the dc offset can also be extracted precisely. For optimising the steady-state and dynamic performance, a parameter tuning guidance is provided from the eigenvalue analysis point of view. In addition, a simple auxiliary unit is presented to remain its frequency-adaptive feature. Finally, experimental results based on a 32-bit fixed-point TMS320F2812 DSP verify the effectiveness of the proposed synchronisation method.", "publicationTitle": "IET Renewable Power Generation", "publisher": "", "place": "", "date": "2013", "volume": "7", "issue": "1", "section": "", "partNumber": "", "partTitle": "", "pages": "55-62", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1049/iet-rpg.2011.0243", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "1752-1416", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "auxiliary unit", "type": 1 }, { "tag": "dc offset", "type": 1 }, { "tag": "distorted conditions", "type": 1 }, { "tag": "distributed power generation", "type": 1 }, { "tag": "dynamic performance", "type": 1 }, { "tag": "eigenvalue analysis", "type": 1 }, { "tag": "eigenvalues and eigenfunctions", "type": 1 }, { "tag": "fixed-point TMS320F2812 DSP", "type": 1 }, { "tag": "frequency-adaptive feature", "type": 1 }, { "tag": "fundamental positive sequence component", "type": 1 }, { "tag": "grid synchronisation", "type": 1 }, { "tag": "negative sequences", "type": 1 }, { "tag": "offset conditions", "type": 1 }, { "tag": "parameter tuning guidance", "type": 1 }, { "tag": "power filters", "type": 1 }, { "tag": "power grids", "type": 1 }, { "tag": "real-complex-coefficient filters", "type": 1 }, { "tag": "renewable energy sources", "type": 1 }, { "tag": "steady-state performance", "type": 1 }, { "tag": "three-phase grid-connected distributed generation systems", "type": 1 }, { "tag": "unbalanced conditions", "type": 1 }, { "tag": "word length 32 bit", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "I7RCGGTJ", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/I7RCGGTJ", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/I7RCGGTJ", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Kusljevic", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "I7RCGGTJ", "version": 2, "itemType": "journalArticle", "title": "On LS-Based Power Frequency Estimation Algorithms", "creators": [ { "creatorType": "author", "firstName": "M.D.", "lastName": "Kusljevic" } ], "abstractNote": "This paper deals with fundamental properties of the least-squares-based estimation algorithms of power frequency, such as immunity and insensitivity to harmonics and noise. This paper is motivated by a recent study that dealt with an optimal case of the distance between equidistantly spaced samples. This paper extends and generalizes that approach by decoupling of task of canceling dc component from the least-squares estimation task. Two different algorithms derived as particular cases of this generalized approach are investigated. In addition, besides the basic least-squares (LS) method, the Prony-based method previously formulated by Lobos and Rezmer has also been investigated. The task of estimation frequency from a pure sine signal without dc component presence is also considered. Finally, the third method is derived and its basic properties are shown.", "publicationTitle": "IEEE Transactions on Instrumentation and Measurement", "publisher": "", "place": "", "date": "2013", "volume": "62", "issue": "7", "section": "", "partNumber": "", "partTitle": "", "pages": "2020-2028", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIM.2013.2248254", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Accuracy", "type": 1 }, { "tag": "Comb filter", "type": 1 }, { "tag": "DC component canceation", "type": 1 }, { "tag": "LS based power frequency estimation algorithms", "type": 1 }, { "tag": "Mathematical model", "type": 1 }, { "tag": "Noise", "type": 1 }, { "tag": "Prony based method", "type": 1 }, { "tag": "Prony-based method", "type": 1 }, { "tag": "equidistantly spaced sample", "type": 1 }, { "tag": "estimation", "type": 1 }, { "tag": "frequency estimation", "type": 1 }, { "tag": "frequency measurement", "type": 1 }, { "tag": "harmonic analysis", "type": 1 }, { "tag": "least squares approximations", "type": 1 }, { "tag": "least squares based estimation algorithms", "type": 1 }, { "tag": "least squares estimation task", "type": 1 }, { "tag": "least-squares (LS) method", "type": 1 }, { "tag": "pure sine signal", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "64J6X327", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/64J6X327", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/64J6X327", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Yamada", "parsedDate": "2013", "numChildren": 0 }, "data": { "key": "64J6X327", "version": 2, "itemType": "journalArticle", "title": "High-Accuracy Estimations of Frequency, Amplitude, and Phase With a Modified DFT for Asynchronous Sampling", "creators": [ { "creatorType": "author", "firstName": "T.", "lastName": "Yamada" } ], "abstractNote": "High-accuracy frequency, amplitude, and phase estimation methods for asynchronous sampling are presented. The proposed estimation methods are based on phase difference estimation, compensation of number of samples, and a modified discrete Fourier transform. This study focused on processing signals in substation automation systems that comply with IEC 61850. Some simulation tests were conducted in cases of pure and distorted sinusoids, and the frequency, amplitude, and phase errors of the fundamental and harmonics are evaluated at fundamental frequencies around 50 Hz at fixed sampling rates of 4 kHz and 12.8 kHz (i.e., 80 and 256 samples per period). Dependence of each estimation accuracy on a fraction of number of samples is discussed.", "publicationTitle": "IEEE Transactions on Instrumentation and Measurement", "publisher": "", "place": "", "date": "2013", "volume": "62", "issue": "6", "section": "", "partNumber": "", "partTitle": "", "pages": "1428-1435", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIM.2013.2239031", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Accuracy", "type": 1 }, { "tag": "IEC 61850", "type": 1 }, { "tag": "IEC standards", "type": 1 }, { "tag": "Manganese", "type": 1 }, { "tag": "Time frequency analysis", "type": 1 }, { "tag": "amplitude estimation", "type": 1 }, { "tag": "amplitude high-accuracy estimations", "type": 1 }, { "tag": "asynchronous sampling", "type": 1 }, { "tag": "discrete Fourier transform (DFT)", "type": 1 }, { "tag": "discrete Fourier transforms", "type": 1 }, { "tag": "distorted waveform", "type": 1 }, { "tag": "estimation", "type": 1 }, { "tag": "frequency estimation", "type": 1 }, { "tag": "frequency high-accuracy estimations", "type": 1 }, { "tag": "modified DFT", "type": 1 }, { "tag": "modified discrete Fourier transform", "type": 1 }, { "tag": "phase difference estimation", "type": 1 }, { "tag": "phase estimation", "type": 1 }, { "tag": "phase high-accuracy estimations", "type": 1 }, { "tag": "signal processing", "type": 1 }, { "tag": "signal sampling", "type": 1 }, { "tag": "spectral leakage error", "type": 1 }, { "tag": "substation automation", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "UXWD9J4Z", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/UXWD9J4Z", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/UXWD9J4Z", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Jong-Hoon Lee and Devaney", "parsedDate": "1994", "numChildren": 0 }, "data": { "key": "UXWD9J4Z", "version": 2, "itemType": "conferencePaper", "title": "Accurate measurement of line frequency in the presence of noise using time domain data", "creators": [ { "creatorType": "author", "firstName": "", "lastName": "Jong-Hoon Lee" }, { "creatorType": "author", "firstName": "M.J.", "lastName": "Devaney" } ], "abstractNote": "A new technique for the accurate measurement of the frequency of\nsinusoidal signals in the presence of noise using time-domain data is\nproposed. This software-based method is based upon an estimation of the\nzero crossings and measures the elapsed time between an even number of\nthe estimated zero crossings with smoothing. The method is iterative in\nthat the sample rate is adjusted, in so far as its resolution permits,\nto be a multiple of the estimated frequency and this permits a\nprogressive refinement of the frequency measurement", "proceedingsTitle": "Instrumentation and Measurement Technology Conference, 1994. IMTC/94. Conference Proceedings. 10th Anniversary. Advanced Technologies in I & M., 1994 IEEE", "conferenceName": "Instrumentation and Measurement Technology Conference, 1994. IMTC/94. Conference Proceedings. 10th Anniversary. Advanced Technologies in I & M., 1994 IEEE", "publisher": "", "place": "", "date": "1994", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "1016-1019 vol.2", "series": "", "seriesNumber": "", "DOI": "", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "IEEE Xplore", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "computerised instrumentation", "type": 1 }, { "tag": "estimated frequency", "type": 1 }, { "tag": "even number", "type": 1 }, { "tag": "frequency measurement", "type": 1 }, { "tag": "parameter estimation", "type": 1 }, { "tag": "power line frequency", "type": 1 }, { "tag": "power system measurement", "type": 1 }, { "tag": "sinusoidal signals", "type": 1 }, { "tag": "smoothing", "type": 1 }, { "tag": "software-based method", "type": 1 }, { "tag": "time domain data", "type": 1 }, { "tag": "time-domain data", "type": 1 }, { "tag": "waveform analysis", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "NW4ERCMR", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/NW4ERCMR", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/NW4ERCMR", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Routray et al.", "parsedDate": "2002-06", "numChildren": 0 }, "data": { "key": "NW4ERCMR", "version": 2, "itemType": "journalArticle", "title": "A novel Kalman filter for frequency estimation of distorted signals in power systems", "creators": [ { "creatorType": "author", "firstName": "A.", "lastName": "Routray" }, { "creatorType": "author", "firstName": "A.K.", "lastName": "Pradhan" }, { "creatorType": "author", "firstName": "K.P.", "lastName": "Rao" } ], "abstractNote": "A simple and novel approach in the design of an extended Kalman filter (EKF) for the measurement of power system frequency has been presented in this paper. The design principles and the validity of the model have been outlined. The performance of this filter has been compared with some of the existing methods for estimating the frequency of a signal under noisy conditions. The feasibility of the proposed filter has been tested in the laboratory under worst-case measurement and network conditions, which might occur in a typical power system. Also, the proof of the stability for the proposed filter has been discussed for a single sinusoid. It has been found that the proposed algorithm is suitable for real-time applications especially when the frequency changes are abrupt and the signal is corrupted with noise and other disturbances due to harmonics", "publicationTitle": "Instrumentation and Measurement, IEEE Transactions on", "publisher": "", "place": "", "date": "Junio 2002", "volume": "51", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "469 -479", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIM.2002.1017717", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Kalman", "type": 1 }, { "tag": "applications;Kalman", "type": 1 }, { "tag": "conditions;nonlinear", "type": 1 }, { "tag": "distorted", "type": 1 }, { "tag": "distortion;filtering", "type": 1 }, { "tag": "estimation;frequency", "type": 1 }, { "tag": "estimation;harmonics;measurement", "type": 1 }, { "tag": "filter;filter", "type": 1 }, { "tag": "filter;power", "type": 1 }, { "tag": "filters;electric", "type": 1 }, { "tag": "filters;power", "type": 1 }, { "tag": "frequency;power", "type": 1 }, { "tag": "harmonics;power", "type": 1 }, { "tag": "measurement;measurement", "type": 1 }, { "tag": "measurement;real-time", "type": 1 }, { "tag": "measurement;stability;", "type": 1 }, { "tag": "signals;extended", "type": 1 }, { "tag": "stability;frequency", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "theory;frequency", "type": 1 }, { "tag": "uncertainty;noisy", "type": 1 }, { "tag": "uncertainty;nonlinear", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "9GH2G77Z", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/9GH2G77Z", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/9GH2G77Z", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Karimi-Ghartemani and Iravani", "parsedDate": "2004-08", "numChildren": 0 }, "data": { "key": "9GH2G77Z", "version": 2, "itemType": "journalArticle", "title": "A method for synchronization of power electronic converters in polluted and variable-frequency environments", "creators": [ { "creatorType": "author", "firstName": "M.", "lastName": "Karimi-Ghartemani" }, { "creatorType": "author", "firstName": "M.R.", "lastName": "Iravani" } ], "abstractNote": "This paper presents a new synchronization method which employs an enhanced phase-locked loop (EPLL) system. The operational concept of the EPLL is novel and based on a nonlinear dynamical system. As compared with the existing synchronization methods, the introduced EPLL-based synchronization method provides higher degree of immunity and insensitivity to noise, harmonics and other types of pollutions that exist in the signal used as the basis of synchronization. The salient feature of the EPLL-based synchronization method over conventional synchronization methods is its frequency adaptivity which permits satisfactory operation when the centre frequency of the base signal varies. The proposed EPLL-based method of synchronization is also capable of coping with the unbalanced system scenarios. Structural simplicity of the EPLL-based method greatly simplifies its implementation in digital software and/or hardware environments as an integral part of a digital control platform for power electronic converters. The primary application of the proposed synchronization method is for the distributed generation units, e.g., wind generation systems, which utilize power electronic converters as an integral part of their systems.", "publicationTitle": "Power Systems, IEEE Transactions on", "publisher": "", "place": "", "date": "aug. 2004", "volume": "19", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "1263 - 1270", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TPWRS.2004.831280", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0885-8950", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "PLL", "type": 1 }, { "tag": "computing;", "type": 1 }, { "tag": "control", "type": 1 }, { "tag": "control;", "type": 1 }, { "tag": "converter;", "type": 1 }, { "tag": "convertors;", "type": 1 }, { "tag": "digital", "type": 1 }, { "tag": "dynamical", "type": 1 }, { "tag": "electronic", "type": 1 }, { "tag": "engineering", "type": 1 }, { "tag": "environment;", "type": 1 }, { "tag": "locked", "type": 1 }, { "tag": "loop", "type": 1 }, { "tag": "loops;", "type": 1 }, { "tag": "method;", "type": 1 }, { "tag": "nonlinear", "type": 1 }, { "tag": "phase", "type": 1 }, { "tag": "phase-locked", "type": 1 }, { "tag": "platform;", "type": 1 }, { "tag": "polluted", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "synchronisation;", "type": 1 }, { "tag": "synchronization", "type": 1 }, { "tag": "system;", "type": 1 }, { "tag": "systems;", "type": 1 }, { "tag": "variable-frequency", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "48F9Z38R", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/48F9Z38R", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/48F9Z38R", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Kusljevic", "parsedDate": "2004", "numChildren": 0 }, "data": { "key": "48F9Z38R", "version": 2, "itemType": "journalArticle", "title": "A Simple Recursive Algorithm for Frequency Estimation", "creators": [ { "creatorType": "author", "firstName": "", "lastName": "Kusljevic" } ], "abstractNote": "A new approach to the design of a digital algorithm\nfor local system frequency estimation is presented. The algorithm\nis derived using the maximum likelihood method. One sinusoidal\nvoltage model was assumed. FIR digital filters used in papers [11],\n[12] are used to minimize the noise effect and to eliminate the presence\nof the harmonics effect. The algorithm showed a very high\nlevel of robustness as well as high measurement accuracy over a\nwide range of frequency changes. The algorithm convergence provided\nfast response and adaptability. This technique provides accurate\nestimates with error in the range of 0.005 Hz in about 25 ms\nand requires modest computations. The theoretical basis and practical\nimplementation of the technique are described. To demonstrate\nthe performance of the developed algorithm, computer simulated\ndata records are processed.", "publicationTitle": "", "publisher": "", "place": "", "date": "2004", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "", "citationKey": "", "url": "http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=1284863", "accessDate": "2010-03-26T13:02:25Z", "PMID": "", "PMCID": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "GUBRK896", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/GUBRK896", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/GUBRK896", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Mai et al.", "parsedDate": "2008-09", "numChildren": 0 }, "data": { "key": "GUBRK896", "version": 2, "itemType": "conferencePaper", "title": "A novel dynamic frequency estimation algorithm in power system", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Mai" }, { "creatorType": "author", "firstName": "Z.Y.", "lastName": "He" }, { "creatorType": "author", "firstName": "B.", "lastName": "Kirby" } ], "abstractNote": "Frequency of voltage signals in power system is a key parameter to reflect the operational state of the whole system. Therefore, a new algorithm is needed to attain a more accurate frequency estimation in both steady state and dynamic conditions, for high level application such as wide area control that let the power system operate in a healthy manner. A dynamic modulation signal model is proposed via Taylor expansion to approximate dynamic voltage signals. The Taylor expansionpsilas derivatives, expressed by consecutive phasors, are to characterize the dynamic behaviour and then be used to revise the phasorspsila estimations of the modulation signal. Revised phasors can be employed to calculate the frequency of the signal based on phasor based frequency measurement technique. Finally the frequency estimation at the report time can be acquired accurately by modifying the frequency using the frequency derivative. Theoretic analysis and simulation allow us to conclude that performance of the algorithm proposed in this paper is much better than traditional phasor-based frequency measurement techniques in dynamic conditions.", "proceedingsTitle": "Universities Power Engineering Conference, 2008. UPEC 2008. 43rd International", "conferenceName": "", "publisher": "", "place": "", "date": "sept. 2008", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "1 -6", "series": "", "seriesNumber": "", "DOI": "10.1109/UPEC.2008.4651512", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Taylor", "type": 1 }, { "tag": "algorithm;dynamic", "type": 1 }, { "tag": "estimation", "type": 1 }, { "tag": "estimation;", "type": 1 }, { "tag": "estimation;frequency", "type": 1 }, { "tag": "estimation;phasor", "type": 1 }, { "tag": "estimation;power", "type": 1 }, { "tag": "expansion;dynamic", "type": 1 }, { "tag": "frequency", "type": 1 }, { "tag": "measurement;modulation;power", "type": 1 }, { "tag": "model;frequency", "type": 1 }, { "tag": "modulation", "type": 1 }, { "tag": "operational", "type": 1 }, { "tag": "parameter", "type": 1 }, { "tag": "signal", "type": 1 }, { "tag": "state;frequency", "type": 1 }, { "tag": "system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "E2CGS8AU", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/E2CGS8AU", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/E2CGS8AU", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Chudamani et al.", "parsedDate": "2009", "numChildren": 0 }, "data": { "key": "E2CGS8AU", "version": 2, "itemType": "journalArticle", "title": "Real-Time Estimation of Power System Frequency Using Nonlinear Least Squares", "creators": [ { "creatorType": "author", "firstName": "R.", "lastName": "Chudamani" }, { "creatorType": "author", "firstName": "K.", "lastName": "Vasudevan" }, { "creatorType": "author", "firstName": "C.S.", "lastName": "Ramalingam" } ], "abstractNote": "This paper presents a nonlinear least squares method for measuring the power system frequency, wherein the voltage at the measurement point is modeled by using the Fourier series. The estimation of the fundamental frequency is a nonlinear problem in this formulation and is solved by performing a 1-D search over the range of allowed frequency variation. The voltage signal is used for frequency estimation because it is typically less distorted than the line current, resulting in computational efficiency. The robustness of this algorithm with respect to change in various parameters is studied through simulation and the results are validated by hardware implementation using a Virtex IV field-programmable gate array. An application of this algorithm to a shunt active power filter is also presented.", "publicationTitle": "Power Delivery, IEEE Transactions on", "publisher": "", "place": "", "date": "2009", "volume": "24", "issue": "3", "section": "", "partNumber": "", "partTitle": "", "pages": "1021-1028", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Power Delivery, IEEE Transactions on", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0885-8977", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Fourier series", "type": 1 }, { "tag": "Nonlinear least squares", "type": 1 }, { "tag": "frequency variation", "type": 1 }, { "tag": "hardware implementation", "type": 1 }, { "tag": "least squares approximations", "type": 1 }, { "tag": "nonlinear estimation", "type": 1 }, { "tag": "power system frequency", "type": 1 }, { "tag": "power system measurement", "type": 1 }, { "tag": "real-time estimation", "type": 1 }, { "tag": "real-time frequency estimation", "type": 1 }, { "tag": "shunt active power filter", "type": 1 }, { "tag": "voltage signal", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "U5RZB9TC", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/U5RZB9TC", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/U5RZB9TC", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Salcic et al.", "parsedDate": "2009", "numChildren": 1 }, "data": { "key": "U5RZB9TC", "version": 2, "itemType": "journalArticle", "title": "An Improved Taylor Method for Frequency Measurement in Power Systems", "creators": [ { "creatorType": "author", "firstName": "Z.", "lastName": "Salcic" }, { "creatorType": "author", "firstName": "", "lastName": "Sing Kiong Nguang" }, { "creatorType": "author", "firstName": "", "lastName": "Yanzhen Wu" } ], "abstractNote": "The frequency of a power system is an important operational parameter for the safety, stability, and efficiency of the power system. Accurate and fast measurement of frequency is a goal required in many applications, for example, for load shedding. An improved Taylor approximation method (ITAM) algorithm is proposed, and a comparison of the new algorithm with the conventional Taylor approximation method (TAM) algorithm is presented in this paper under the assumption of the presence of a direct-current (DC) offset component, higher order harmonics, and random noise in the power system signal. The proposed ITAM has the characteristics of low computational and simple hardware requirements, as well as more accurate measurement performance. Another key feature of the algorithm is a good tracing ability for the frequency change and measurement of rate of change of the frequency of a power system.", "publicationTitle": "Instrumentation and Measurement, IEEE Transactions on", "publisher": "", "place": "", "date": "2009", "volume": "58", "issue": "9", "section": "", "partNumber": "", "partTitle": "", "pages": "3288-3294", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Instrumentation and Measurement, IEEE Transactions on", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Field-programmable gate array (FPGA)", "type": 1 }, { "tag": "ITAM algorithm", "type": 1 }, { "tag": "approximation theory", "type": 1 }, { "tag": "direct-current offset component", "type": 1 }, { "tag": "frequency measurement", "type": 1 }, { "tag": "higher order harmonics", "type": 1 }, { "tag": "improved Taylor approximation method", "type": 1 }, { "tag": "load shedding", "type": 1 }, { "tag": "operational parameter", "type": 1 }, { "tag": "power system", "type": 1 }, { "tag": "power system efficiency", "type": 1 }, { "tag": "power system harmonics", "type": 1 }, { "tag": "power system measurement", "type": 1 }, { "tag": "power system safety", "type": 1 }, { "tag": "power system signal", "type": 1 }, { "tag": "power system stability", "type": 1 }, { "tag": "real time", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "UQA74GBW", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/UQA74GBW", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/UQA74GBW", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Kostyla", "parsedDate": "2010-05", "numChildren": 0 }, "data": { "key": "UQA74GBW", "version": 2, "itemType": "conferencePaper", "title": "Methods of frequency estimation in PWM converters systems", "creators": [ { "creatorType": "author", "firstName": "Pawel", "lastName": "Kostyla" } ], "abstractNote": "Fast determination of frequency of the fundamental waveform of voltages and currents is essential for the control and protection of electrical power systems. In this paper the advanced methods of frequency estimation of distorted signals are presented. These methods, basing on Prony's model, are useful for frequency estimation of distorted signals in real time mode. These signals appear in circuit consisted frequency converters. In order to obtain improvement of preciseness and quality some modifications of the algorithm were introduced.", "proceedingsTitle": "Environment and Electrical Engineering (EEEIC), 2010 9th International Conference on", "conferenceName": "", "publisher": "", "place": "", "date": "Mayo 2010", "eventPlace": "", "volume": "", "issue": "", "numberOfVolumes": "", "pages": "431 -434", "series": "", "seriesNumber": "", "DOI": "10.1109/EEEIC.2010.5489915", "ISBN": "", "citationKey": "", "url": "", "accessDate": "", "ISSN": "", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "U8EWASJF", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/U8EWASJF", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/U8EWASJF", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Kusljevic et al.", "parsedDate": "2010", "numChildren": 0 }, "data": { "key": "U8EWASJF", "version": 2, "itemType": "journalArticle", "title": "Frequency Estimation of Three-Phase Power System Using Weighted-Least-Square Algorithm and Adaptive FIR Filtering", "creators": [ { "creatorType": "author", "firstName": "M. D.", "lastName": "Kusljevic" }, { "creatorType": "author", "firstName": "J. J.", "lastName": "Tomic" }, { "creatorType": "author", "firstName": "L. D.", "lastName": "Jovanovic" } ], "abstractNote": "A new technique for estimation of the instantaneous frequency based on simultaneous sampling of three-phase voltage signals is presented. The structure consists of two decoupled modules: the first is for adaptive filtering of input signals, and the second is for frequency estimation. A suitable and robust algorithm for frequency estimation is obtained. This technique provides better performance, compared with the technique based on a single-phase signal in relation to waveforms with noise. The technique is particularly important when asymmetric sags generate zero voltage in one of the three phases. In addition, it allows the measurement of the instantaneous frequency value of real signals for single- or three-phase systems. To demonstrate the performance of the developed algorithm, computer-simulated data records and calibrator-generated signals are processed. The proposed algorithm has been put to test with distorted three-phase voltage signals.", "publicationTitle": "Instrumentation and Measurement, IEEE Transactions on", "publisher": "", "place": "", "date": "2010", "volume": "59", "issue": "2", "section": "", "partNumber": "", "partTitle": "", "pages": "322-329", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "Instrumentation and Measurement, IEEE Transactions on", "DOI": "", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Adaptive filtering", "type": 1 }, { "tag": "finite-impulse-response (FIR) filter", "type": 1 }, { "tag": "frequency estimation", "type": 1 }, { "tag": "frequency measurement", "type": 1 }, { "tag": "harmonics", "type": 1 }, { "tag": "median filter", "type": 1 }, { "tag": "recursive algorithm", "type": 1 }, { "tag": "three-phase power system", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "UBUEFZTN", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/UBUEFZTN", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/UBUEFZTN", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Park et al.", "parsedDate": "2011-08", "numChildren": 0 }, "data": { "key": "UBUEFZTN", "version": 2, "itemType": "journalArticle", "title": "Improved Method for Frequency Estimation of Sampled Sinusoidal Signals Without Iteration", "creators": [ { "creatorType": "author", "firstName": "Soon Young", "lastName": "Park" }, { "creatorType": "author", "firstName": "Young Sub", "lastName": "Song" }, { "creatorType": "author", "firstName": "Hang Joon", "lastName": "Kim" }, { "creatorType": "author", "firstName": "Jongsik", "lastName": "Park" } ], "abstractNote": "This paper presents a method for estimating the signal frequency of sampled sinusoidal signals, which does not require any iteration for the frequency search. A noniterative method of frequency estimation was already developed by Zhang , where an analytical expression for the signal frequency is obtained using the differences between the neighboring input data. However, this method is very susceptible to additive noise. This paper extends the algorithm of Zhang to maintain the same signal-to-noise ratio as with the traditional four-parameter estimation method that requires iterations for the signal frequency search. Unfortunately, the proposed method is unable to estimate the accurate frequency in the case of an infinite number of data points when noises are added to the signal. From a noise analysis, it was found that the average frequency estimation error becomes zero when using a (2/3) #x03C0; phase interval to calculate the signal difference. Numerical simulation results show that the frequency estimation error when Gaussian noise is added to the input data is about 13% higher than the square root of the Cramer-Rao bound. An additional 6% error is also added when the phase interval for frequency estimation deviates 10% from (2/3) #x03C0; . Furthermore, it was found that the effect of harmonic components on the frequency estimation error can be minimized when the phase interval is close to (2/3) #x03C0;, and the total number of data sample covers several signal periods or truncated close to an integer multiple of the signal period. As a result, the frequency estimation with the proposed method is more than 40 times more accurate than that with the IEEE-1057 method when the harmonic components are added to the input signal, which is confirmed by numerical simulations.", "publicationTitle": "Instrumentation and Measurement, IEEE Transactions on", "publisher": "", "place": "", "date": "aug. 2011", "volume": "60", "issue": "8", "section": "", "partNumber": "", "partTitle": "", "pages": "2828 -2834", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIM.2011.2121231", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Gaussian", "type": 1 }, { "tag": "estimation;sampled", "type": 1 }, { "tag": "estimation;signal", "type": 1 }, { "tag": "frequency;signal-to-noise", "type": 1 }, { "tag": "noise;frequency", "type": 1 }, { "tag": "ratio;Gaussian", "type": 1 }, { "tag": "sampling;", "type": 1 }, { "tag": "signals;signal", "type": 1 }, { "tag": "sinusoidal", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "9MDETTC5", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/9MDETTC5", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/9MDETTC5", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Seyedi and Sanaye‐Pasand", "parsedDate": "2011", "numChildren": 0 }, "data": { "key": "9MDETTC5", "version": 2, "itemType": "journalArticle", "title": "A new time‐domain based power system frequency estimation algorithm", "creators": [ { "creatorType": "author", "firstName": "Heresh", "lastName": "Seyedi" }, { "creatorType": "author", "firstName": "Majid", "lastName": "Sanaye‐Pasand" } ], "abstractNote": "Frequency stability is one of the most important features of power systems. It is closely dependent on the value of system frequency. In the present day modern power systems, fast and accurate frequency estimation has become quite vital. Any mistake in accurate estimation of frequency may threaten the frequency stability or at least lead to system operation problems. In this paper, a new time-domain based power system frequency estimation algorithm is proposed. Different abnormal events such as frequency decline due to load-generation mismatch are modeled and ability of the new frequency measurement technique to track the frequency is tested. Performance of the new method is evaluated and compared with an existing frequency estimation algorithm. Simulation results confirm advantages of the new approach over the existing method. Copyright © 2011 John Wiley & Sons, Ltd.", "publicationTitle": "European Transactions on Electrical Power", "publisher": "", "place": "", "date": "2011", "volume": "", "issue": "", "section": "", "partNumber": "", "partTitle": "", "pages": "", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1002/etep.572", "citationKey": "", "url": "http://onlinelibrary.wiley.com/doi/10.1002/etep.572/abstract", "accessDate": "2011-04-29T09:36:21Z", "PMID": "", "PMCID": "", "ISSN": "1546-3109", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "en", "libraryCatalog": "Wiley Online Library", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "frequency estimation algorithms", "type": 1 }, { "tag": "frequency tracking", "type": 1 }, { "tag": "power system frequency measurement", "type": 1 }, { "tag": "wavelet transform", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } }, { "key": "5PQZW7QA", "version": 2, "library": { "type": "group", "id": 181676, "name": "Estimación de frecuencia", "links": { "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia", "type": "text/html" } } }, "links": { "self": { "href": "https://api.zotero.org/groups/181676/items/5PQZW7QA", "type": "application/json" }, "alternate": { "href": "https://www.zotero.org/groups/estimacin_de_frecuencia/items/5PQZW7QA", "type": "text/html" } }, "meta": { "createdByUser": { "id": 274264, "username": "Andoni", "name": "", "links": { "alternate": { "href": "https://www.zotero.org/andoni", "type": "text/html" } } }, "creatorSummary": "Regulski and Terzija", "parsedDate": "2012-04", "numChildren": 0 }, "data": { "key": "5PQZW7QA", "version": 2, "itemType": "journalArticle", "title": "Estimation of Frequency and Fundamental Power Components Using an Unscented Kalman Filter", "creators": [ { "creatorType": "author", "firstName": "P.", "lastName": "Regulski" }, { "creatorType": "author", "firstName": "V.", "lastName": "Terzija" } ], "abstractNote": "In this paper, a new method for the simultaneous estimation of power components and frequency is presented. The method is based on the application of the unscented Kalman filter (UKF), which is an estimator capable of estimating the unknown model parameters during severe dynamic changes in the system. A particular advantage of using the UKF is the straightforward estimation procedure, which does not require linearization of the nonlinear signal model. This is an important feature as it improves the accuracy of the method during network transients. The nonlinear state-space parameter model for instantaneous power, taking into account the fundamental components of the system voltages and currents, is used as a starting point for the estimation of the power components and frequency. In the instantaneous power parameter model, the system frequency is considered to be an unknown model parameter, and it is estimated simultaneously with the other unknown model parameters: active and apparent power and the power angle. This resulted in an efficient numerical algorithm for the estimation of power components, which is not sensitive to variations of system frequency. The new estimator has been tested through computer simulations and by using data records obtained under laboratory conditions.", "publicationTitle": "Instrumentation and Measurement, IEEE Transactions on", "publisher": "", "place": "", "date": "april 2012", "volume": "61", "issue": "4", "section": "", "partNumber": "", "partTitle": "", "pages": "952 -962", "series": "", "seriesTitle": "", "seriesText": "", "journalAbbreviation": "", "DOI": "10.1109/TIM.2011.2179342", "citationKey": "", "url": "", "accessDate": "", "PMID": "", "PMCID": "", "ISSN": "0018-9456", "archive": "", "archiveLocation": "", "shortTitle": "", "language": "", "libraryCatalog": "IEEE Xplore", "callNumber": "", "rights": "", "extra": "", "tags": [ { "tag": "Kalman", "type": 1 }, { "tag": "components;instantaneous", "type": 1 }, { "tag": "data", "type": 1 }, { "tag": "estimation;fundamental", "type": 1 }, { "tag": "estimation;nonlinear", "type": 1 }, { "tag": "filter;Kalman", "type": 1 }, { "tag": "filters;frequency", "type": 1 }, { "tag": "filters;power", "type": 1 }, { "tag": "model", "type": 1 }, { "tag": "model;nonlinear", "type": 1 }, { "tag": "parameter;network", "type": 1 }, { "tag": "parameter;unknown", "type": 1 }, { "tag": "parameters;unscented", "type": 1 }, { "tag": "power", "type": 1 }, { "tag": "records;frequency", "type": 1 }, { "tag": "signal", "type": 1 }, { "tag": "state-space", "type": 1 }, { "tag": "system", "type": 1 }, { "tag": "transients;", "type": 1 }, { "tag": "transients;nonlinear", "type": 1 } ], "collections": [], "relations": {}, "dateAdded": "2013-07-05T10:41:22Z", "dateModified": "2013-07-05T10:41:22Z" } } ]