A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications
This paper presents an effective quasi open-loop (QOLS) synchronization technique for grid -connected power converters that is organized in two different blocks. The first block is a new flexible technique for extracting the positive and negative sequence voltage under unbalanced and distorted condi...
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| Format: | Article |
| Language: | English |
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Riga Technical University Press
2021-06-01
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| Series: | Electrical, Control and Communication Engineering |
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| Online Access: | https://doi.org/10.2478/ecce-2021-0006 |
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| _version_ | 1846146160168796160 |
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| author | Chedjara Zakaria Massoum Ahmed Wira Patrice Safa Ahmed Gouichiche Abdelmadjid |
| author_facet | Chedjara Zakaria Massoum Ahmed Wira Patrice Safa Ahmed Gouichiche Abdelmadjid |
| author_sort | Chedjara Zakaria |
| collection | DOAJ |
| description | This paper presents an effective quasi open-loop (QOLS) synchronization technique for grid -connected power converters that is organized in two different blocks. The first block is a new flexible technique for extracting the positive and negative sequence voltage under unbalanced and distorted conditions. It is a decoupled double self-tuning filter (DD-STF) or multiple self-tuning filters (M-STF) according to the conditions. The main advantages of this technique are its simple structure and the fact of being able to work under highly distorted conditions. Each harmonic is separately treated and this allows for selective compensation in active filter applications. The second block is the frequency detector; we propose a neural approach based on an ADALINE for online adaptation of the cut-off frequency of the DD-STF and M-STF considering a possible variation in the main frequency. The main advantage of this method is its immunity to the voltage signal amplitude and phase. In order to improve the performance of the frequency estimation under distorted source voltage, a pre-filtering stage is introduced. Experimental tests validate the proposed method and illustrate all its interesting features. Results show high performance and robustness of the method under low voltage ride through. |
| format | Article |
| id | doaj-art-6ed2c44b565043f5bc937f36831b3294 |
| institution | Kabale University |
| issn | 2255-9159 |
| language | English |
| publishDate | 2021-06-01 |
| publisher | Riga Technical University Press |
| record_format | Article |
| series | Electrical, Control and Communication Engineering |
| spelling | doaj-art-6ed2c44b565043f5bc937f36831b32942024-12-02T04:25:15ZengRiga Technical University PressElectrical, Control and Communication Engineering2255-91592021-06-01171475810.2478/ecce-2021-0006A New Quasi Open Loop Synchronization Technique for Grid-Connected ApplicationsChedjara Zakaria0Massoum Ahmed1Wira Patrice2Safa Ahmed3Gouichiche Abdelmadjid4Faculty of Electrical Engineering, Djillali Liabes University, Sidi Bel Abbès, AlgeriaFaculty of Electrical Engineering, Djillali Liabes University, Sidi Bel Abbès, AlgeriaUniversité de Haute-Alsace, UHA (IRIMAS), Mulhouse Cedex, FranceLaboratoire LGEP, Université Ibn Khaldoun Tiaret, Tiaret, AlgeriaLaboratoire LGEP, Université Ibn Khaldoun Tiaret, Tiaret, AlgeriaThis paper presents an effective quasi open-loop (QOLS) synchronization technique for grid -connected power converters that is organized in two different blocks. The first block is a new flexible technique for extracting the positive and negative sequence voltage under unbalanced and distorted conditions. It is a decoupled double self-tuning filter (DD-STF) or multiple self-tuning filters (M-STF) according to the conditions. The main advantages of this technique are its simple structure and the fact of being able to work under highly distorted conditions. Each harmonic is separately treated and this allows for selective compensation in active filter applications. The second block is the frequency detector; we propose a neural approach based on an ADALINE for online adaptation of the cut-off frequency of the DD-STF and M-STF considering a possible variation in the main frequency. The main advantage of this method is its immunity to the voltage signal amplitude and phase. In order to improve the performance of the frequency estimation under distorted source voltage, a pre-filtering stage is introduced. Experimental tests validate the proposed method and illustrate all its interesting features. Results show high performance and robustness of the method under low voltage ride through.https://doi.org/10.2478/ecce-2021-0006adaptive linear neuron (adaline)distributed energy sources (des)low voltage ride through operation (lvrt)open loop synchronization (ols)self-tuning filter (stf) |
| spellingShingle | Chedjara Zakaria Massoum Ahmed Wira Patrice Safa Ahmed Gouichiche Abdelmadjid A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications Electrical, Control and Communication Engineering adaptive linear neuron (adaline) distributed energy sources (des) low voltage ride through operation (lvrt) open loop synchronization (ols) self-tuning filter (stf) |
| title | A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications |
| title_full | A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications |
| title_fullStr | A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications |
| title_full_unstemmed | A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications |
| title_short | A New Quasi Open Loop Synchronization Technique for Grid-Connected Applications |
| title_sort | new quasi open loop synchronization technique for grid connected applications |
| topic | adaptive linear neuron (adaline) distributed energy sources (des) low voltage ride through operation (lvrt) open loop synchronization (ols) self-tuning filter (stf) |
| url | https://doi.org/10.2478/ecce-2021-0006 |
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