分布式光伏电源对配电网短路电流影响的仿真分析  

Simulation Analysis on Influences of Distributed Photovoltaic Generation on Short-Circuit Current in Distribution Network

作　　者：刘健[1] 林涛[2] 同向前[3] 李龙[2] 张志华[1] 

机构地区：[1]陕西电力科学研究院,陕西省西安市710054 [2]国家电网公司,北京市西城区100031 [3]西安理工大学自动化与信息工程学院,陕西省西安市710048

出　　处：《电网技术》2013年第8期2080-2085,共6页Power System Technology

基　　金：国家电网公司科学技术项目(5226KY11003800)~~

摘　　要：为应对分布式光伏电源接入配电网的挑战,从分布式光伏并网逆变器的电路拓扑和控制策略出发,仿真分析了并网逆变器在配电网发生三相相间短路故障、两相相间短路故障以及分布式光伏电源不同出力时输出电流的变化特性,同时仿真分析了逆变器自身绝缘栅双极型晶体管(insulatedgate bipolar transistor,IGBT)器件开路、交流侧单相断线故障时输出电流的变化特性,得出无论配电网发生三相或两相短路,由光伏供出的短路电流都不超过其额定电流的1.5倍的结论,并对逆变器自身故障的保护提出了要求。To address the challenge due to connecting distributed photovoltaic（PV） generation to distribution network,based on the circuit topology of grid-connecting inverter of PV generation and its control strategy the simulation analysis on variation of output current characteristics of grid-connecting inverter under three-phase short-circuit fault and interphase short-circuit fault occurred in distribution network as well as that under different output of distributed PV generation are performed;meanwhile,the simulation analysis on variation of output current characteristics of grid-connecting inverter under open-circuit of insulated gate bipolar transistor（IGBT） device of the inverter and single-phase disconnection fault occurred in AC side are carried out.All simulation results show that whether three-phase fault or interphase fault occurs in distribution network,the short-circuit current output by grid-connecting inverter does not exceed 1.5 times of its rated current,and the approaches to cope with fault occurred in the inverter itself are put forward.

关 键 词：配电网 配电自动化 光伏电源 短路电流 

分 类 号：TM721[电气工程—电力系统及自动化]