首页 | 本学科首页   官方微博 | 高级检索  
     

变压器绕组短路接地故障的保护
引用本文:朱声石.变压器绕组短路接地故障的保护[J].电力自动化设备,2002,22(8):1-3.
作者姓名:朱声石
作者单位:国家电力公司电力自动化研究院,江苏,南京,210003
摘    要:用安匝平衡关系分析了星形绕组单相短路接地故障,导出了普通纵差保护和零差保护的差动电流。由此证明当接地点造近中性点附近时零差保护的灵敏度很高,但是在国内的故障统计资料中没有发生此类故障的记录。对这种故障普通纵差保护相对于零差保护只是灵敏性较低,且并非完全不起作用,因此增加零差保护的必要性值得商榷。

关 键 词:变压器  绕组  短路  接地故障  纵差保护
文章编号:1006-6047(2002)08-0001-03
修稿时间:2002年3月14日

Protection on transformer winding grounding fault
ZHU Sheng shi.Protection on transformer winding grounding fault[J].Electric Power Automation Equipment,2002,22(8):1-3.
Authors:ZHU Sheng shi
Abstract:The single phase grounding fault of transformer's star winding is analyzed with the ampere turns balance.The differential currents for the longitudinal differential protection and the restricted earth protection are derived in term of ampere turns.It shows that the restricted earth protection is very sensitive when the fault is near the neutral point of the star winding.The longitudinal differential protection can also protect such faults though it is less sensitive than restricted earth protection.There is no this kind of fault records in the fault statistics of China.The necessity of adding the restricted earth protection should be discussed.
Keywords:restricted earth protection  earth fault protection  star winding  
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《电力自动化设备》浏览原始摘要信息
点击此处可从《电力自动化设备》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号