分布式光伏接入对配电网凹陷域预估结果影响  

Impact of distributed photovoltaic access on forecast results of sag regions in distribution networks

作　　者：傅质馨[1] 王婧佳 朱俊澎 袁越[1] FU Zhi-xin;WANG Jing-jia;ZHU Jun-peng;YUAN Yue(College of Energy and Electrical Engineering,Hohai University,Nanjing Jiangsu 211100,China)

机构地区：[1]河海大学能源与电气学院,江苏南京211100

出　　处：《电源技术》2020年第10期1518-1521,1548,共5页Chinese Journal of Power Sources

基　　金：国家自然科学基金青年项目(51807051);江苏省自然科学基金青年项目(BK20180507);江苏省“六大人才高峰”资助项目(2014-XNY-008)。

摘　　要：搭建了含分布式光伏的配电网模型,从接入的光伏容量不同和位置不同两个角度研究了分布式光伏接入对配电网电能质量的影响。综合考虑电压暂降幅值、持续时间以及相位跳变因素,重点分析分布式光伏对配电网凹陷域预估结果的影响,利用故障点法得出不同光伏容量和位置下的凹陷域范围。仿真分析表明,考虑因素不同得到的凹陷域范围不同,在预估凹陷域范围时应该综合考虑三方面因素,通过叠加得出最后预估的凹陷域范围。通过研究发现,适当增加光伏容量,可以缩小凹陷域的范围。A distribution network model with distributed photovoltaics was built.And the impact of distributed photovoltaic access on the power quality of the distribution network,from two perspectives:different PV capacity and location,was studied.Considering the magnitude,duration and phase transition of the voltage sag,the impact of distributed photovoltaics on the estimated results of the sag region of the distribution network was analyzed.The fault point method was used to obtain the sag region range with different photovoltaic capacity and location.The simulation analysis shows that the range of the sag domain is different when considering different factors.When estimating the range of the sag domain,three factors should be considered comprehensively,and the final estimated sag domain range is obtained by superposition.It has been found through research that appropriately increasing the photovoltaic capacity can reduce the area of vulnerability.

关 键 词：配电网 分布式光伏 电能质量 凹陷域 电压偏差 电压总谐波畸变率 

分 类 号：TM615[电气工程—电力系统及自动化]