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| The Discussion on the Besting of 35kV Neutral Point of SHEBU Transformer Caused by Extinction Coil |
| LI Ji-bin |
| Guigang Power Supply Bureau of Guangxi Power Grid Company, Guigang, Guangxi 537100, China |
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Abstract Research purposes: Boosting of 35 kV neutral-point of SHEBU transformer caused by extinction coil is not good for the normal work of the equipment. With the data on bus bar three-phase voltage to ground, the neutral-point voltage and the imbalance degree of wire-to-earth of the system are calculated, the reasons for the problem mentioned above are analyzed, and the measures for them are presented.
Research conclusions: The main reason for the boosting caused by extinction. coil is that the imbalance degree of wire-to-earth capacity is over high. The ideal resolution is to replace extinction coil of SHEBU transformer with the one that can automatically trace and adjust the compensative current.
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Received: 03 January 2008
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[4]谢植飚.贵港供电局220 kV社步变电站35 kV消弧线圈投运导致35 kV系统电压不平衡的研究分析报告[R].南宁:广西电力试验研究院有限公司,2007.
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2008, Vol. 25 
