摘要
本文以两起35kV变电站保护越级跳闸事件分析实例为依据,深入探讨相关继电保护越级跳闸原因,结合现场相关试验数据或继电保护动作故障波形记录,重点分析电流互感器励磁饱和导致继电保护装置不能正确动作的过程,为类似事件的分析计算提供参考方法,并为防止电流互感器饱和提出预防措施,以促进电网系统的稳定运行。
Based on the analysis of two 35kV substation protection overstepping trip events,this article discusses the causes of related relay protection overstepping trips in depth,and combines field test data or relay protection operation fault waveform records to focus on analyzing the current transformer excitation saturation and the incorrect operation of electrical protection device,provides a reference method for the analysis and calculation of similar events,and proposes preventive measures to prevent saturation of the current transformer to promote the stable operation of the power grid system.
作者
张春刚
缪际
甘龙
唐强
李辉
Zhang Chungang;Miao Ji;Gan Long;Tang Qiang;Li Hui(Kunming Power Supply Bureau of Yunnan Power Grid Co.,Ltd,Kunming 650011)
出处
《电气技术》
2020年第6期78-82,87,共6页
Electrical Engineering
关键词
越级跳闸
电流互感器
励磁饱和
继电保护动作
leap-over trip
current transformer
excitation saturation
relay protection action
