中压供电系统单相接地故障有关问题分析  

Analysis on Problems Related to Single-phase Grounding Fault of Medium-voltage Power Supply System

作　　者：李英武[1] 沈喆 

机构地区：[1]中国航空规划建设发展有限公司,北京市100011 [2]北京银行天津分行,天津市300020

出　　处：《建筑电气》2015年第11期6-11,共6页Building Electricity

摘　　要：供电系统中单相接地故障发生的几率最高。本文对中压供电系统单相接地故障电压与电流变化进行分析;提出电压与电流互感器选择、单相接地保护配置,以及单相接地故障电流的计算方法。Single-phase grounding fault of the power supply system is most likely to occur. The change of voltage and current of single-phase grounding fault of the medium-voltage power supply system is analyzed, and the selection of voltage and current transformers, the configuration of single-phase grounding protection and the method for computing the current of single-phase grounding fault are provided.

关 键 词：单相接地故障电流 对地电容电流 对地不平衡电容电流 零序电流 零序电流互感器 零序电压 电压互感器 剩余绕组 

分 类 号：TU852[建筑科学]