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,espe-cially in the case of multiple scenarios.Finally,the robustness of model parameters is dis-cussed,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
Key words
load modeling/photovoltaic generation system/generalized load/generalized composite load model
维普
万方数据