陈锡磊,胡彬,张思,陆海清
CHEN Xilei,HU Bin,ZHANG Si,LU Haiqing

• 1:国网浙江慈溪市供电公司
• 2:国网浙江省电力公司电力科学研究院

摘要(Abstract)：

根据桥断路器双TA布置的内桥变电站的接线特点,分析了在桥断路器与两侧TA之间发生故障时的主变差动保护动作行为,指出在上述位置发生故障时将出现全站停电的情况。据此,提出了改进的差动保护逻辑,并详细分析了该差动保护逻辑在变电站不同运行方式下的动作行为,能够最大程度地避免全站停电,提高桥断路器双TA布置的内桥变电站的供电可靠性。
Aiming at the wiring characteristics of inner bridge substation with double TA distribution of bridge circuit breaker, the paper analyzes differential protection action of main transformer when faults occur between bridge circuit breaker and TA at its both sides. It is indicates that there will be outage when faults occurs in the aforementioned location. Therefore, the paper presents an improved differential protection logic and expounds its protection action under different operation modes, for the purpose of avoiding outage of the entire substation to the maximum extent and improving power supply reliability of inner bridge substation with bridge circuit breaker equipped with double TA.

关键词(KeyWords)： 内桥接线;双TA布置;全站停电;差动保护
inner bridging wiring;double TA distribution;substation outage;differential protection

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 陈锡磊,胡彬,张思,陆海清
CHEN Xilei,HU Bin,ZHANG Si,LU Haiqing

DOI: 10.19585/j.zjdl.2017.02.004

参考文献(References)：

• [1]张自伟.变电站内桥接线方式下的保护死区问题探讨[J].浙江电力,2013,32(1):27-30.
• [2]叶志刚.两种差动保护中的死区问题及其解决[J].供用电,2008,25(5):32-34.
• [3]李斌,马超,商汉军,等.内桥接线主变压器差动保护误动原因分析[J].电力系统自动化,2009,33(1):99-102.
• [4]金山红.浅谈110 kV内桥接线变电所主变差动保护的接线与选型[J].浙江电力,2003,22(1):50-51.
• [5]李双伟.一起线路保护装置异常报警的分析处理[J].浙江电力,2016,35(8):39-41.
• [6]蒋道乾,余荣强,李君.变电站内桥接线方式下备自投动作的可靠性探讨[J].南方电网技术,2014,8(4):77-81.
• [7]王建成,张涛,张建成,等.500 kV主变差动保护TA问题分析及改进[J].浙江电力,2015,34(10):12-16.
• [8]陆振芬,王徐延.110 kV内桥接线变电站的安全运行分析[J].江苏电机工程,2009,28(6):37-39.
• [9]姜正驰,屈晗炜,施伟成.内桥接线变电站主变差动保护死区问题分析[J].电力安全技术,2015,17(5):58-60.