电工技术学报2017，Vol.32Issue(17)：11-20,10.DOI:10.19595/j.cnki.1000-6753.tces.161187
基于故障分量的孤岛微电网保护
Islanded Microgrid Protection Based on Fault Components
摘要
Abstract
The fault characteristic of islanded microgrid is different from that of grid-connected microgrid,which is closely related to the control strategy of microsource,it is necessary to carry out specific research on the protection of islanded microgrid.According to the fault models of U/f controlled and PQ controlled microsources with fault ride-through (FRT) capacity,this paper analyzed their output current characteristics under different fault types and presented the phase characteristics in each bus and feeder when the fault occurs in different positions of microgrid.A protection principle is proposed to locate the fault point,which is based on phase characteristics between fault component of positive sequence bus voltages and those of feeder currents.Finally,a simulation model is established with PSCAD/EMTDC,and the results verify the validity of the proposed protection principle.关键词
微电网/故障控制策略/故障分量/微电网保护Key words
Microgrid/fault control strategies/fault component/microgrid protection分类
信息技术与安全科学引用本文复制引用
周涵,牟龙华,郭文明..基于故障分量的孤岛微电网保护[J].电工技术学报,2017,32(17):11-20,10.基金项目
国家自然科学基金资助项目(51407128). （51407128）
