基于Prony算法合闸于故障保护方案

摘要

The Prony analyzing method is applied in the paper to study the error protection when the breaker is switched on. At first,Matlab is used for the modeling and simulation of failure in switching on. Then,the data measured at half or a whole circle after the breaker being switched on in location of relay are taken as samples and analyzed by Prony algorithm. It is shown that through alarge amount of simulation and theoretical analysis that the transient components of various frequencies during the transient period of switching on can be calculated accurately at half or a whole circle after being switched on by Prony algorithm. In this way,the failure in the line can be identified correctly.%将Prony分析方法应用于断路器合闸于故障保护。利用Matlab软件对断路器合闸于输电线路故障和非故障情况下的暂态过程进行建模和仿真，对合闸后半个周波或1个周波输电线路保护安装处实测的电流数据进行采样，应用Prony算法对其进行分析，提取出此暂态电流中包含的各次自振荡分量的各个特征量，识别出线路中是否存在故障。仿真证明：该分析方法可在合闸后半个周波或1个周波准确求出合闸操作暂态过程中各次频率的分量，从而正确识别线路的故障。