分布式光伏对配电网电压的影响机理及仿真分析  

Influence mechanism and simulation analysis of distributed photovoltaic on distribution network voltage

作　　者：杨晓辉[1] 杨莉[1] 杨磊 钟伟杰 YANG Xiaohui;YANG Li;YANG Lei;ZHONG Weijie(School of Information Engineering, Nanchang University, Nanchang 330031, China)

机构地区：[1]南昌大学信息工程学院

出　　处：《实验技术与管理》2019年第10期63-68,共6页Experimental Technology and Management

基　　金：国家自然科学基金项目(51765042,61463031,61662044,61773051);江西省教育厅教学改革项目(JXYJG-2017-02,JXJG-18-1-43)

摘　　要：通过分析分布式光伏并入配电网对电压偏差的影响机理,得出光伏接入后将提高线路电压水平,且线路某点电压变化量与相对光伏并网点位置、光伏容量及线路参数有关.搭建了6节点配电网网络和分布式光伏并网仿真模型,仿真分析了分布式光伏容量、并网点位置及线路参数对配电网电压偏差带来的影响.仿真结果表明:光伏接入容量越大、接入位置越远离首端,对线路电压的提升也越大;线路越长、导线线径越小、负荷越小、配变容量越小,电压升高幅度越大.By analyzing the influence mechanism of distributed photovoltaic integrated into distribution network on voltage deviation, it is concluded that the line voltage level is increased after the photovoltaic connection, and the variation of line voltage at a certain point is related to the position of relative photovoltaic grid-connected point, photovoltaic capacity and line parameters. The six-node distribution network and distributed photovoltaic grid-connected simulation model are built, and the effects of distributed photovoltaic capacity, grid-connected point location and line parameters on voltage deviation of distribution network are simulated and analyzed. The simulation results show that the larger the photovoltaic access capacity, the farther the access location is from the head, the greater the voltage rise of the line, the longer the line is, the smaller the wire diameter, the smaller the load is, and the smaller the distribution capacity, the larger the voltage increase is.

关 键 词：配电网 分布式光伏 光伏并网点位置 电压偏差 

分 类 号：TM615[电气工程—电力系统及自动化]