内蒙古电力技术

2021, (04) 90-92+96

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变电站站用直流系统合环问题分析
Analysis of Loop Closing Problem in DC System in Substations

李国强
LI Guoqiang

摘要(Abstract):

以某220 kV变电站2段直流系统合环故障为例,分析了绝缘监测装置的工作原理,在此基础上总结了正极相连、负极相连、正负相连3种直流合环故障的典型特征及处理方法。使用Proteus软件建立绝缘监测装置的仿真电路,针对220 kV变电站产生的合环故障进行仿真,结果表明,该故障类型与根据合环故障特征所判断的结果一致,为解决现场实际问题提供了技术手段。
Taking a loop closing failure of DC system in two sections of 220 kV substation as an example,the working principle of the insulation monitoring device is analyzed.On this basis,the typical characteristics and treatment methods of the three types of DC loop faults are summarized:positive connection,negative connection,and positive and negative connection.Proteus software is used to build a simulation circuit of the insulation monitoring device to simulate the loop closing faults generated by the 220 kV substation.The result shows that the type of failure is consistent with the result of the above judgment.The characteristics of loop closing faults provides technical means for solving practical problems on site.

关键词(KeyWords): 直流系统;合环故障;绝缘监测;平衡桥;Proteus仿真;直流接地
DC system;loop closing failure;insulation monitoring;balance bridge;Proteus simulation;DC grounding

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作者(Author): 李国强
LI Guoqiang

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