面向广义负荷的光伏发电系统等效建模研究  

Research on Equivalent Modeling of PV Generation System for Generalized Load

作　　者：屈星[1] 李欣然[2] 盛义发[1] 苏泽光[1] 赵宇红[1] QU Xing;LI Xinran;SHENG Yifa;SU Zeguang;ZHAO Yuhong(School of Electrical Engineering,University of South China,Hengyang 421001,Hunan Province,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,Hunan Province,China)

机构地区：[1]南华大学电气工程学院,湖南省衡阳市421001 [2]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《电网技术》2020年第6期2143-2150,共8页Power System Technology

基　　金：湖南省教育厅项目(18C0429)。

摘　　要：随着配网侧光伏发电规模持续增大,光伏发电系统的动态行为对配网侧综合负荷特性产生影响,建立面向负荷的光伏发电系统等效模型十分重要。基于Matlab/Simulink搭建了光伏发电系统并网仿真平台,通过将光伏发电系统看作一种广义负荷,并对其在暂态过程中的动态运行特性进行分析,提出一种面向负荷的光伏发电系统二阶等效模型,该等效模型由电阻、电感及电容组成的串联电路并联恒功率源构成。通过不同扰动强度下的仿真分析,检验了所提出的等效模型的有效性、泛化能力和参数稳定性。With the increasing scale of photovoltaic(PV)power generation on distribution network side,the dynamic behavior of PV generation system has significant impact on the comprehensive load characteristics on distribution network side,and it is very important to establish a load-oriented equivalent model of PV generation system.A grid connection simulation platform of PV generation system is built based on MATLAB/Simulink.Considering PV generation system as a generalized load and analyzing its dynamic operation characteristics in transient process,a load-oriented second-order equivalent model of PV generation system is proposed.This equivalent model consists of a constant power source and a series circuit in parallel including a resistor,an inductor and a capacitor.Validity,generalization ability and parameter stability of the proposed equivalent model are verified with simulation analysis under different disturbance intensities.

关 键 词：负荷建模 光伏发电系统 广义负荷 等效模型 

分 类 号：TM721[电气工程—电力系统及自动化]