含逆变型分布式电源的小电阻接地方式配电网单相接地故障分析  

Earth fault analysis on low resistance grounded distribution network with inverter interfaced distribution generation

作　　者：徐玉琴[1] 杨浩[1] 李鹏[1] Xu Yuqin;Yang Hao;Li Peng(North China Electric Power University,Baoding 071003,Hebei,China)

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电测与仪表》2018年第16期57-63,71,共8页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51577068)

摘　　要：针对含有逆变型分布式电源的小电阻接地方式配电网,根据IIDG的控制策略结合对称分量法,建立了IIDG并网后其上游侧和下游侧的单相接地故障分析模型,对IIDG并网变压器在不同接地方式下的故障点电流,主网侧和IIDG侧的各序和各相电流分别进行了分析,最后利用PSCAD/EMTDC搭建故障仿真模型,验证了分析的正确性,为并网变压器接地方式的选择及继电保护的配置提供依据。In view of a low resistance grounded distribution network containing IIDG,according to the control strategy of IIDG combined with symmetrical component method,the single-phase earth fault analysis model of upstream and downstream side of IIDG is established in this paper.Earth fault point current,sequence fault current,and three-phase fault current are analyzed respectively when parallel transformer of IIDG adopts different grounding modes,and finally,the PSCAD/EMTDC is used to build fault simulation model to verify the correctness of the analysis.The conclusions could be provided as reference when choose the grounding modes for parallel transformer of IIDG and the configuration of protective relaying.

关 键 词：小电阻接地配电网 逆变型分布式电源 单相接地故障 中性点接地方式 故障电流 

分 类 号：TM933[电气工程—电力电子与电力传动]