Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms
With the rapid development of wind energy, relay protection for large-scale wind farms has been attracting some researchers, due to the absence of standards. Based on the large-scale doubly fed induction generator (DFIG)-based wind farms located in Gansu Province, China, this paper studies the diffe...
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-08-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/7/9/5566 |
| _version_ | 1811301144144642048 |
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| author | Bingtuan Gao Wei Wei Luoma Zhang Ning Chen YingjunWu Yi Tang |
| author_facet | Bingtuan Gao Wei Wei Luoma Zhang Ning Chen YingjunWu Yi Tang |
| author_sort | Bingtuan Gao |
| collection | DOAJ |
| description | With the rapid development of wind energy, relay protection for large-scale wind farms has been attracting some researchers, due to the absence of standards. Based on the large-scale doubly fed induction generator (DFIG)-based wind farms located in Gansu Province, China, this paper studies the differential protection for the outgoing power transformer of large-scale DFIG-based wind farms. According to the equivalent circuit of the power grid integrated with wind farms, the main frequency components of current and voltage during faults are identified mathematically and then verified by simulations. The results show that the frequencies of current and voltage at the terminals of outgoing transmission lines are inconsistent. Following the feature of frequency inconsistency, the adaptability of differential protection is analyzed, and it is found that differential protection for an outgoing transformer in large-scale wind farms may fail once ignoring the frequency inconsistency. Simulation studies demonstrate that inconsistent frequency characteristics will deteriorate the sensitivity and reliability of differential protection. Finally, several suggestions are provided for improving the performance of relay protections for large-scale DFIG-based wind farms. |
| first_indexed | 2024-04-13T07:03:41Z |
| format | Article |
| id | doaj.art-c4a31011bf21491f8db00edc60801948 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T07:03:41Z |
| publishDate | 2014-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-c4a31011bf21491f8db00edc608019482022-12-22T02:57:03ZengMDPI AGEnergies1996-10732014-08-01795566558510.3390/en7095566en7095566Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind FarmsBingtuan Gao0Wei Wei1Luoma Zhang2Ning Chen3YingjunWu4Yi Tang5School of Electrical Engineering, Southeast University, No. 2, Sipailou, Nanjing 210096, Jiangsu, ChinaSchool of Electrical Engineering, Southeast University, No. 2, Sipailou, Nanjing 210096, Jiangsu, ChinaSchool of Electrical Engineering, Southeast University, No. 2, Sipailou, Nanjing 210096, Jiangsu, ChinaChina Electric Power Research Institute, No. 8, Nanrui Road, Nanjing 210003, Jiangsu, ChinaSchool of Automation, Nanjing University of Posts and Telecommunications, No. 9, Wenyuan Road, Nanjing 210023, Jiangsu, ChinaSchool of Electrical Engineering, Southeast University, No. 2, Sipailou, Nanjing 210096, Jiangsu, ChinaWith the rapid development of wind energy, relay protection for large-scale wind farms has been attracting some researchers, due to the absence of standards. Based on the large-scale doubly fed induction generator (DFIG)-based wind farms located in Gansu Province, China, this paper studies the differential protection for the outgoing power transformer of large-scale DFIG-based wind farms. According to the equivalent circuit of the power grid integrated with wind farms, the main frequency components of current and voltage during faults are identified mathematically and then verified by simulations. The results show that the frequencies of current and voltage at the terminals of outgoing transmission lines are inconsistent. Following the feature of frequency inconsistency, the adaptability of differential protection is analyzed, and it is found that differential protection for an outgoing transformer in large-scale wind farms may fail once ignoring the frequency inconsistency. Simulation studies demonstrate that inconsistent frequency characteristics will deteriorate the sensitivity and reliability of differential protection. Finally, several suggestions are provided for improving the performance of relay protections for large-scale DFIG-based wind farms.http://www.mdpi.com/1996-1073/7/9/5566wind farmdifferential protectiontransformerfrequency inconsistency |
| spellingShingle | Bingtuan Gao Wei Wei Luoma Zhang Ning Chen YingjunWu Yi Tang Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms Energies wind farm differential protection transformer frequency inconsistency |
| title | Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms |
| title_full | Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms |
| title_fullStr | Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms |
| title_full_unstemmed | Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms |
| title_short | Differential Protection for an Outgoing Transformer of Large-Scale Doubly Fed Induction Generator-Based Wind Farms |
| title_sort | differential protection for an outgoing transformer of large scale doubly fed induction generator based wind farms |
| topic | wind farm differential protection transformer frequency inconsistency |
| url | http://www.mdpi.com/1996-1073/7/9/5566 |
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