电力系统保护与控制2009，Vol.37Issue(14)：68-71,92,5.
基于零序电流比值变化的小电流接地选线方法
A method of single-phase grounded feeder detection in indirectly earthed power system based on judging the change of zero-sequence current ratios
徐梅 1杨文荣 1吴淑梅 2王柱1
作者信息
- 1. 河北工业大学电磁场与电器可靠性省部共建国家重点实验室培育基地,天津,300130
- 2. 河北科技大学电气信息学院,河北,石家庄,050018
- 折叠
摘要
Abstract
When single-phase-to-ground fault occurs in the indirectly power system,with the compensation current of the arc-suppressing coil ,it is difficult to select the fault line.After analyzing the line selection methods at present, the zero-sequence current ratio method is presented.It is based on judging the change of zero-sequence current ratios after the compensation.According to the deduction , the formula is presented.Simulation with Matlab shows that this calculation method has high accuracy.The delay of cutting damping resistance is not needed,and it can select the fault line quickly and accurately.关键词
小电流接地/零序电流比值/单相接地故障/选线/消弧线圈Key words
indirectly power system/zero sequence current ratio/single-phase-to-ground fault/line selection/arc-suppressing coil分类
信息技术与安全科学引用本文复制引用
徐梅,杨文荣,吴淑梅,王柱..基于零序电流比值变化的小电流接地选线方法[J].电力系统保护与控制,2009,37(14):68-71,92,5.
