面向综合负荷的并网光伏发电系统等效建模  

Equivalent Modeling of Grid-connected Photovoltaic Power Generation Systems for Comprehensive Load

作　　者：李培强[1] 曾小军[1] 黄际元[2] 童莹[1] 张晓敏[1] 张立[3] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]国网湖南省电力公司长沙供电分公司,湖南省长沙市410015 [3]国网湖南省电力公司株洲供电分公司,湖南省株洲市412000

出　　处：《电力系统自动化》2016年第8期43-50,共8页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51277055);国家重点基础研究发展计划(973计划)资助项目(2012CB215106)~~

摘　　要：基于MATLAB/Simulink和光伏电池自身的物理机理搭建了并网光伏发电的仿真系统,研究了其对配电网综合负荷特性的影响因素,分析比较了已有光伏发电系统等效模型的优劣。在此基础上构建了光伏发电系统传递函数等效模型,该模型具有结构简单、参数少、能有效描述光伏发电系统的出力极限等优点,同时易于在电力系统仿真软件中实现。采用所提出的等效模型与传统综合负荷模型并联,构建广义综合负荷模型,对含光伏发电系统的综合负荷进行建模,仿真实践表明此广义综合负荷模型具有良好的泛化能力,辨识参数稳定,能够满足工程仿真的需要。A simulation system for the grid-connected photovoltaic （PV） power generation system is developed based on the MATLAB/Simulink and the physical mechanism of the PV cells. The influence of the grid-connected PV power generation system on the comprehensive load characteristic of distribution network is studied. And several equivalent models available to the PV power generation system are analyzed and compared. On this basis, a new equivalent model based on transfer functions for the PV power generation system is proposed. The model has a simple structure, less parameters, and can effectively describe the output limit of PV power generation system. At the same time, it is easy to implement in the power system simulation software. A generalized comprehensive load model is developed by paralleling the conventional comprehensive load model with the new equivalent model to describe the characteristic of the comprehensive load containing PV power generation systems. Simulation results show that the generalized comprehensive load model has good generalization ability and stable identification parameters, while meeting the need of engineering simulation.

关 键 词：综合负荷建模 光伏发电 等效模型 改进遗传算法 

分 类 号：TM615[电气工程—电力系统及自动化]