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| Research on low-voltage winding current transformer wiring of phase differential protection in 500kV autotransformer |
| YU Hang1, ZHENG Yu2, JIANG Jiongfeng1, SITU Weiye1, WANG Hao1 |
1. Zhongshan Power Supply of Guangdong Power Grid Co., Ltd, Zhongshan, Guangdong 528400;
2. Foshan Power Supply of Guangdong Power Grid Co., Ltd, Foshan, Guangdong 528000 |
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Abstract Phase differential protection uses low-voltage winding current transformer at the low-voltage side in 500kV autotransformer. On the basis of describing the differential protection depolarity wiring for the autotransformer, this paper focuses on analyzing the wiring and polarity of low-voltage winding current transformer in the phase differential protection to solve the difficulties in the current transformer polarity acceptance of the autotransformer differential protection in actual work. Finally, through a load test case of 500kV autotransformer, the actual operating state and action of the protection devices are explained in detail where the polarity of the low-voltage winding current transformer is reversed.
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Received: 29 November 2022
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| Cite this article: |
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YU Hang,ZHENG Yu,JIANG Jiongfeng等. Research on low-voltage winding current transformer wiring of phase differential protection in 500kV autotransformer[J]. Electrical Engineering, 2023, 24(2): 77-81.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2023/V24/I2/77
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2023, Vol. 24 
