含分布式电源的配电网故障和保护范围问题分析

针对分布式电源接入配电网对继电保护的配置及整定产生的影响,研究了含分布式电源配电网的故障和对应的保护范围划分问题.配电网故障由电网保护切除,分布式电源须与电网保持一定时间连接;分布式电源范围内故障时,变电站侧保护需作为其后备保护.;Aiming at the impact on the protection configuration and settings in the distribution network with distributed generation,the study describes the fault and partition on protection zones in distribution network. In case of faults on the over-regional distribution grid,the DG has to stay connected with the grid for a certain period of time. In case of faults on the DG zone,the protection in the substation represents a backup protection functions