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Analysis and Modification of Protection Misaction of Series Compensation Caused by DC Grounding
Pages: 28-29,54
Year: Issue:  1
Journal: Guangxi Electric Power

Keyword:  继电保护装置串补控制保护直流接地;
Abstract: 为解决某进口串补控制保护在直流接地故障时误动的问题,通过对一起误动事件的分析,针对该控制保护的特点,采取在保护逻辑中对相关非电气量开入进行延时确认的措施来躲开直流接地时电容充放电形成的短时开入脉冲.实际测试结果表明,经修改保护逻辑后,直流接地时产生的短时脉冲不会导致该串补控制保护误动.在逻辑中对相关非电气量开入进行延时确认的措施能有效消除该进口串补控制保护在直流接地故障时误动的隐患.
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