摘要
介绍了间歇性接地保护的原理及上海市电网的相关技术要求,讨论了影响间歇性接地保护动作的3项因素,分析了在上下级站内保护装置不同的情况下,当间歇性接地故障发生时,由于计算方法的细微差异致使间歇性接地保护越级跳闸的情况。根据录波及保护动作情况还原了事件发生的过程。针对不同保护装置对间歇性接地保护实现细节不同的问题,提出了相关改进措施。
This paper introduces the principle of intermittent grounding protection and the relevant technical requirements of Shanghai power grid,and analyzes the three factors affecting the action of intermittent grounding protection.In the case of different protection devices in the substations,when an intermittent ground fault occurs,the slight difference in the calculation method causes the malfunction of the intermittent ground fault protection.The process of the accident is restored according to the disturbance recorder.In view of the different implementation details of intermittent ground fault protection by different protection devices,relevant improvement measures are proposed.
作者
郑天奇
史媛
杨剑
顾劲岳
ZHENG Tianqi;SHI Yuan;YANG Jian;GU Jingyue(State Grid Shibei Power Supply Company,SMEPC,Shanghai 200072,China)
出处
《电力与能源》
2021年第5期562-565,共4页
Power & Energy
关键词
间歇性接地故障
跳闸分析
误动分析
intermittent grounding fault
trip analysis
maloperation analysis
