分布式光伏电源对配电网电压波动的影响研究  

Research on influence of distributed photovoltaic generation on voltage fluctuations in distribution network

作　　者：陈懿[1] 刘涤尘[1] 吴军[1] 陈炜[1] 徐雨田 Chen Yi;Liu Dichen;Wu Jun;Chen Wei;Xu Yutian(School of Electrical Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电测与仪表》2018年第14期27-32,共6页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(5211011400BT);国家自然科学基金项目(51207114)

摘　　要：分布式光伏电源接入配电网后导致电压波动加剧等问题,限制了光伏发电的快速发展。文章从理论角度分析得到光伏功率波动水平以及光伏电源接入点短路容量大小是影响配电网电压波动大小的主要因素;考虑到未来光伏容量不断增加,光伏功率波动水平必将不断提高,因此增大接入点短路容量是降低电压波动实现大量分布式光伏电源接入配电网最为可行的方法,而配电网采用环网结构能增大接入点短路容量;最后在PSCAD/EMTDC中搭建了完整的光伏电源系统以及IEEE13节点模型,仿真验证了配电网采用环网结构增大短路容量能有效削弱光伏电源对配电网电压波动的影响,为分布式光伏的良好发展奠定基础。Voltage fluctuations and other issues become more serious when the distributed photovoltaic(PV)power supply accesses to distribution network,which limits the rapid development of photovoltaic power generation.This paper concludes from the theoretical point of view that the level of photovoltaic power fluctuation and the short-circuit capacity of the photovoltaic power supply access point are the main factors that affect the fluctuation of the distribution network voltage.Considering the increase of PV capacity in the future,the better way to weaken voltage fluctuation is to gain the network short circuit capacity through the loop-close operation of annular network,which is also beneficial for more PV generation to be connected to distribution network.The correctness of above-mentioned analysis,which lays the foundation for the great development of distributed PV,is verified by using PSCAD/EMTDC to establish numerical examples of IEEE13-node model with PV generation system.

关 键 词：分布式光伏电源 电压波动 配电网 PSCAD/EMTDC 环网结构 

分 类 号：TM711[电气工程—电力系统及自动化]