A diagnostic signal current trace detecting based single phase-to-ground fault line identifica- tion and section location method for non-effectively grounded distribution systems is presented in this paper.A special d...A diagnostic signal current trace detecting based single phase-to-ground fault line identifica- tion and section location method for non-effectively grounded distribution systems is presented in this paper.A special diagnostic signal current is injected into the fault distribution system,and then it is detected at the outlet terminals to identify the fault line and at the sectionalizing or branching point along the fault line to locate the fault section.The method has been put into application in actual distribution network and field experience shows that it can identify the fault line and locate the fault section correctly and effectively.展开更多
传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低...传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低通滤波器的改进型位置误差信号提取策略。该策略通过提高环路增益实现带宽扩展,再利用DFNF加强对二次注入谐波的抑制能力,使位置观测环同时具备高带宽与强滤波特性。首先,对位置观测等效闭环进行建模,并利用闭环传递函数幅频特性分析传统位置误差信号提取策略存在的问题;然后,对改进型位置误差信号提取策略的原理进行介绍,并对比2种位置误差信号提取策略的性能;最后,基于RT-LAB实验平台,对2种位置误差信号提取策略的位置辨识效果进行对比验证。展开更多
基金Postdoctoral Foundation of China(No.20070410755)PAN Zhencun,born in 1962,male,postdoctor researcher.
文摘A diagnostic signal current trace detecting based single phase-to-ground fault line identifica- tion and section location method for non-effectively grounded distribution systems is presented in this paper.A special diagnostic signal current is injected into the fault distribution system,and then it is detected at the outlet terminals to identify the fault line and at the sectionalizing or branching point along the fault line to locate the fault section.The method has been put into application in actual distribution network and field experience shows that it can identify the fault line and locate the fault section correctly and effectively.
文摘传统高频脉振电压注入法采用基于带通滤波器与低通滤波器结合的策略,实现位置误差信号提取。但该策略的不足在于无法同时兼顾位置观测闭环的滤波精度与动态性能。为此,提出一种基于双频陷波器(dual frequency notch filter,DFNF)级联低通滤波器的改进型位置误差信号提取策略。该策略通过提高环路增益实现带宽扩展,再利用DFNF加强对二次注入谐波的抑制能力,使位置观测环同时具备高带宽与强滤波特性。首先,对位置观测等效闭环进行建模,并利用闭环传递函数幅频特性分析传统位置误差信号提取策略存在的问题;然后,对改进型位置误差信号提取策略的原理进行介绍,并对比2种位置误差信号提取策略的性能;最后,基于RT-LAB实验平台,对2种位置误差信号提取策略的位置辨识效果进行对比验证。