一起分布电容导致站用直流电源系统故障事件的原因分析与改进  

Cause Analysis and Improvement of One Transformer Substation DC Power System Failure Caused by Distributed Capacitance

作　　者：甘战 邓应开 王小江 GAN Zhan;DENG Yingkai;WANG Xiaojiang(CSG EHV Power Transmission Company(Qujing Bureau),Qujing,Yunnan 655000,China)

机构地区：[1]中国南方电网超高压输电公司(曲靖局),云南曲靖655000

出　　处：《自动化应用》2023年第10期102-104,共3页Automation Application

摘　　要：本文介绍了一起站用直流电源系统绝缘故障过程,利用试验验证了分布电容导致绝缘监测仪在投不平衡桥时发出绝缘故障报警信号,并修改了绝缘监测仪投不平衡桥时检测母线对地电压的时间定值,修改定值后问题得到了解决,本文提出的措施为其他具有大分布电容的站用直流电源系统运维工作提供了经验参考。This paper introduces one process of insulation malfunction for transformer substation DC power system,making experiments to verify that the distributed capacitance is the reason to make the insulation monitor sending insulation malfunction alarm signals when it casts unbalanced bridge.and modifying the value of time which measures the bus-to-ground voltage when casting unbalanced bridge in insulation monitor,the problem is resolved after modifying the value,The paper proposed measures provide operation and maintenance experiences for other transformer substation DC power systems which contain large distributed capacitance.

关 键 词：直流电源系统 接地 平衡桥 绝缘监测仪 

分 类 号：TM63[电气工程—电力系统及自动化]