一种考虑光伏发电系统的广义综合模型  

A Generalized Composite Load Mode Considering Photovoltaic Power Systems

作　　者：屈星[1] 李涵哲 文娟[1] 崔贵平 QU Xing;LI Hanzhe;WEN Juan;CUI Guiping(School of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China)

机构地区：[1]南华大学电气工程学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2024年第1期80-89,共10页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(62003157)。

摘　　要：分布式光伏发电系统(photovoltaic generation systems,PVGS)深刻影响了配网侧综合负荷特性,研究考虑分布式光伏发电系统的配网侧广义综合负荷模型是解决分布式光伏发电系统参与电网仿真的有效途径。简述了光伏电池模型及PVGS的并网控制策略,基于MATLAB/Simulink搭建了PVGS仿真平台;通过仿真并分析PVGS动态特性,提出一种适合广义负荷建模的PVGS外特性等效模型——恒功率并联过阻尼状态的电阻、电感及电容(resistance-inductance-capacitance,RLC)串联电路,进行并通过了有效性检验;将PVGS等效模型并联经典综合负荷模型(classic load model,CLM),构建了考虑分布式PVGS的配网侧广义综合负荷模型。通过对比分析此广义综合负荷模型与已有广义综合负荷模型的描述性能,仿真表明本文模型的精确性更好,尤其是多场景下的描述能力;讨论了模型参数的稳定性,结果表明稳定性良好。Distributed photovoltaic power generation systems(PVGS)profoundly affects the comprehensive load characteristics in the distribution network,and the study of the generalized composite load model of distribution network considering distributed PVGS is an effective way to address the participation of distributed PVGS in grid simulation.This paper briefly describes the photovoltaic cell model and the grid-connected control strategy of PVGS,and builds a PVGS simulation platform based on MATLAB/Simulink.Through the simulation and analysis of PVGS dynamic characteristics,the equivalent model of PVGS external characteristics suitable for generalized load modeling is proposed and tested,which combines a resistance-inductance-capacitance(RLC)serial circuit over-damping and a constant power model.And then using the proposed PVGS equivalent model and the classic load model(CLM)the generalized composite load model considering PVGS is constructed.By comparing and analyzing the description performance of this generalized comprehensive load model with the existing generalized comprehensive load model,the simulation shows that the accuracy of this model is relatively better,especially in the case of multiple scenarios.Finally,the robustness of model parameters is discussed,and the results show that the robustness is satisfactory.

关 键 词：负荷建模 光伏发电系统 广义负荷 广义综合负荷模型 

分 类 号：TM615[电气工程—电力系统及自动化]