中性点经电阻接地10kV电力系统单相接地故障探讨与分析  

Discussion and Analysis of Single-phase Grounding Fault of 10kV Power System Neutral Point Grounded by Resistance

作　　者：李永祥 LI Yongxiang(Chemical Branch of Zhongtianhechuang Energy Co.,Ltd.,Ordos 017399,China)

机构地区：[1]中天合创能源有限责任公司化工分公司,内蒙古鄂尔多斯017399

出　　处：《电工技术》2018年第18期73-74,88,共3页Electric Engineering

摘　　要：中性点经电阻接地10kV电力系统发生单相接地故障时,产生的故障电流包括短路电流和电容电流,在继电保护定值整定和故障分析时,需考虑短路电流和电容电流的影响。本文利用图示分别说明10kV电力系统线路在发生三种单相接地故障情况时电流的构成及电容电流和短路电流的流向,并计算故障电流的大小,为继电保护定值计算整定和故障分析提供参考数据。When a single phase grounding fault occurs in 10 kV power system neutral point grounded by resistance, the fault currents include short circuit current and capacitive current. When setting relay protection and analyzing faults, the effects of short circuit current and capacitor current must be considered. The figures were used to show the composition of the current and the flow of the capacitor current and the short circuit current in the event of three singlephase ground faults in the lOkV power system line and the magnitude of the fault current was calculated. It provided reference data for setting calculation of relay protection and fault analysis.

关 键 词：电阻接地系统 电容电流 整定值 单相接地故障 

分 类 号：TM862[电气工程—高电压与绝缘技术]