电力系统保护与控制Issue(4)：143-149,7.
在配电网中发生单相接地故障时不借助电压互感器计算残余电压角度的方法
A method to compute residual voltage angle without voltage transformers during single phase earth fault in distribution network
李容 1任睿 1宋聚忠1
作者信息
- 1. 施耐德电气中国技术中心，上海 201114
- 折叠
摘要
Abstract
During single phase earth faults in distribution networks it is often insufficient to use current information only to perform directional fault detection. If the residual voltage angle is also available, the fault direction can be identified more easily. Due to the additional cost of voltage transformers they are often not available in distribution networks. This paper presents a method to estimate residual voltage angle with low-cost voltage presence indication system. The distribution networks are classified into groups according to their neutral earthing types. Different calculation methods are given for each group. The calculation methods have been validated by co-simulation with EMTP/ATP and MATLAB. The result shows that directional fault detection of single phase earth fault with the estimated residual voltage angle can achieve a promising accuracy. This method can also be applied in distribution networks with distributed energy resources.关键词
残余电压/故障定位/线路故障指示器/单相接地/中性点接地/分布式电源Key words
residual voltage/directional fault detection/fault passage indicator/single phase earth fault/neutral earthing/distributed energy resource分类
信息技术与安全科学引用本文复制引用
李容,任睿,宋聚忠..在配电网中发生单相接地故障时不借助电压互感器计算残余电压角度的方法[J].电力系统保护与控制,2015,(4):143-149,7.
