华电技术 ›› 2013, Vol. 35 ›› Issue (7): 53-55.

• 技术交流 • 上一篇    下一篇

空冷电厂一起变压器平衡绕组故障的分析及处理

  

  1. (华能铜川电厂,陕西铜川〓727100)
  • 出版日期:2013-07-25 发布日期:2013-08-20

Analysis on transformer balance winding fault of an aircooled power plant and treatment

  1. (Huaneng Tongchuan Power Plant, Tongchuan 727100, China)
  • Online:2013-07-25 Published:2013-08-20

摘要:

摘要:介绍了变压器平衡绕组的作用,分析了一起比较少见的Yyn0+d连接组别的空冷电厂变压器平衡绕组短路引起差动保护动作的案例。对于变压器两侧电流转化计算,采用了一种快捷的计算方法,可准确判断故障所在位置,为故障处理奠定了基础。

关键词: 关键词:变压器, 平衡绕组, 差动保护, 短路简化分析

Abstract:

Abstract:The function of transformer balance winding was introduced. An infrequent short circuit fault of transformer balance winding was introduced. The transformer is installed in an aircooled power plant and connected in mode of Yyn0+d, and the short circuit fault of its balance winding had caused the differential protection to trip. A new fast method was adopted for transformation and calculation of first and second currents of the transformer. The fault position can be determined correctly by the new method, which provides a base for the fault treatment.

Key words: Key words:transformer, balance winding, differential protection, simplified analysis on short circuit fault