配电网故障定位的电流相位比较法

Current Phase Comparison Method for Fault Location of Distribution Network

针对分布式电源接入配电网以后,传统的电流保护不能满足继电保护需要的问题,提出一种利用比较配电网区域注入电流相位差来确定区域是否发生故障的定位方法,详细推导了方法的原理以及适用的条件。该方法满足DG接入以后对配电网保护提出的要求,仅利用比较注入区域的故障电流相位差进行了故障判断,对通信系统的要求较低,同时也满足了工程实际的需要。在此基础上,文章通过IEEE14节点对该故障判定方法进行了仿真,证明了该方法的正确性。

Aiming at the problem that the traditional current protection can not meet the need of relay protection after the distributed power supply is connected to the distribution network,this paper puts forward a positioning method to determine the fault of the area by comparing the phase difference of the injection current in the distribution network,and deduces the principle of the method and the applicable conditions in detail.This method satisfies the requirement for distribution network protection after DG access.It only uses the fault current phase difference of the injection area to make fault judgment.The requirement for the communication system is low,and it also satisfies the actual needs of the project.On this basis,the fault determination method is simulated through IEEE14 node,and the correctness of the method is proved.