用于光伏发电系统直流侧的电涌保护器研究  

Research of SPDs on DC Side of PV System

作　　者：赵炜[1] 姚喜梅 张小青[1] ZHAO Wei;YAO Ximei;ZHANG Xiaoqing(School of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;China Association for Standardization,Beijing 100048,China)

机构地区：[1]北京交通大学,北京100044 [2]中国标准化协会,北京100048

出　　处：《电瓷避雷器》2019年第4期17-21,共5页Insulators and Surge Arresters

基　　金：国家自然科学基金资助项目(编号:51777007)

摘　　要：在光伏发电系统直流侧通常是通过在电池板出线端、汇流箱、配电柜及逆变器端等重要部位设置电涌保护器来限制雷电电涌过电压.基于光伏发电系统直流侧的电涌保护器的设计需要,本文对复合型电涌保护器进行了仿真研究.首先对由压敏电阻和气体放电管串联构成的保护支路进行PSCAD软件暂态仿真,并进行实测加以校验.然后仿真考察了3种常用结构的电涌保护器在全模下的雷电暂态响应及保护特性.通过对比分析,发现在可实现保护功能的若干种保护器结构中,Δ型结构为最优选择.本文提出的仿真研究结果可为光伏发电系统直流侧电涌保护器的设计提供定量化的参考依据.SPDs(Surge Protective Devices)are usually installed at output terminals of PV panels,combiner box,distribution cabinet and PV inverter to restrain the lightning surge overvoltage.For the design requirement of surge protective device(SPD)installed on the DC side of photovoltaic generation system,a simulation research is conducted on three typical SPDs.The residual voltages of the complex protective branch consisted of metal oxide varistor(MOV)and gas discharging tube(GDT)is first obtained by the PSCAD simulation and measurement,respectively.A comparison is made between the simulated and measured results for checking the validity of the simulation model.Then,the protective performances of the three typical SPDs are investigated by the transient simulation in common and differential modes.A reasonable choice of the SPD structure is taken by the contrast simulation analysis.TypeΔis found to be the optimal choice.The simulation results presented in this paper can provide a quantitative reference basis for the design of SPD on the DC side of PV system.

关 键 词：直流电涌保护器 复合型SPD 全模保护 PSCAD 

分 类 号：TM7[电气工程—电力系统及自动化]