摘要
计及光伏等新能源电源的配电网广义负荷模型,通常是在传统综合负荷模型的基础上并联新能源电源的等值模型,其结构庞大,模型阶数较高,使得参数难以辨识。提出一种计及光伏的配电网广义负荷一体化等值建模方法,其简化了模型结构,且无需依赖光伏发电系统的出力数据。基于光伏发电系统动态特性的理论和仿真分析,提出光伏发电系统的多项式等值模型;建立光伏发电系统和配电网静态负荷的一体化模型,扩展参数取值范围,并采用改进遗传算法对模型参数进行辨识。基于DIgSILENT-MATLAB联合仿真平台的仿真结果表明,所提一体化等值模型能够较为准确地描述计及光伏发电系统的配电网广义负荷的动态特性。
The generalized load model for distribution network considering new energy sources such as photovoltaic is usually formed by paralleling the traditional composite load model with the equivalent model of new energy sources,which makes the model have huge structure and high model order,and parameters difficult to identify. An integrated equivalent modeling method for generalized load of distribution network considering photovoltaic is proposed,which simplifies the model structure and does not depend on the output data of photovoltaic generation system. Based on the theory and simulation analysis of dynamic characteristics of photovoltaic generation system,the polynomial equivalent model of photovoltaic generation system is proposed.The integrated model of photovoltaic generation system and static load of distribution network is established,the value ranges of parameters are extended,and the improved genetic algorithm is adopted to identify the model parameters. The simulative results based on the combined simulation platform of DIgSILENT and MATLAB show that the proposed model can accurately describe the dynamic characteristics of the gene-ralized load of distribution network considering photovoltaic generation system.
作者
吴峰
戴小妹
WU Feng;DAI Xiaomei(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2020年第5期1-7,46,共8页
Electric Power Automation Equipment
基金
国家自然科学基金重点资助项目(51837004)。
关键词
光伏发电系统
配电网
一体化建模
多项式模型
动态特性
负荷建模
联合仿真
photovoltaic generation system
distribution network
integrated modeling
polynomial model
dynamic characteristic
load modeling
combined simulation
