期刊论文

Arc Eliminating Performance and Application of Fast Grounding Switch Considering Line Voltage Drop

Zhao, Jun(zjcsust@163.com)

中文

电力系统自动化

1000-1026

2018

42

20

158-164

10.7500/AEPS20180109010

本校为第一机构

快速接地开关兼具电压、电流双重消弧效果,但传统分析未考虑线路压降对故障点电流的影响,需进一步分析其消弧性能。考虑故障线路动态参数,建立应用快速接地开关的配电网单相接地故障模型,采用对称分量法推导出故障点电流计算公式。计算结果显示故障点电流受故障线路负载电流、序阻抗、相间电容、故障距离以及过渡电阻等多重因素影响。分析快速接地开关等效熄弧电路模型,表明快速接地开关可有效抑制间歇性弧光接地过电压,但在故障线路动态参数造成故障线路压降较大的稳定低阻燃弧过程中,快速接地开关可能增大故障点电流,不利于电弧熄灭。结合快速接地开关的优缺点分别对单独应用快速接地开关消弧...

The fast grounding switch has both voltage and current double arc suppression effect, but traditional analysis does not take the effect of voltage drop on the current at fault point into account, which needs further analysis of arc suppression performance. Considering the dynamic parameters of the fault line, a single-phase grounding fault model of distribution network with fast grounding switch is established, and the expression of the fault point current is derived by the symmetrical component method. The calculation results show that the fau...