华电技术 ›› 2018, Vol. 40 ›› Issue (8): 31-33.

• 技术交流 • 上一篇    下一篇

电流互感器接地点原则及案例分析

  

  1. 内蒙古大唐国际托克托发电有限责任公司,内蒙古托克托〓010216
  • 出版日期:2018-08-25 发布日期:2018-09-20

Ground point principle and case analysis of current transformer

  1. Inner Mongolia Datang International Togtoh Power Generation Company Limited,Togtoh 010216,China
  • Online:2018-08-25 Published:2018-09-20

摘要:

针对一起由于电流互感器二次绕组两点接地引起测量回路分流,导致主变压器差动保护误动作的事件,对现场可能出现的电流互感器错误接线进行了分析,明确了电流互感器二次回路只允许且必须在保护柜屏内一点接地的重要性和必要性。

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Abstract:

Measured circuits shunts caused by twopoint grounding of the current transformer secondary winding, leaded to malfunction of main transformer differential protection. Aiming at the accident, analysis on possible current transformer false wiring was made at the scene. It expounds the importance and necessity that only onepoint ground of current transformer secondary circuit is the allowed in the protection cabinet screen.

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