路面光伏并网系统建模与间谐波分析  

Modelling and Interharmonic Analysis of Solar PV Road Grid-connected System

作　　者：毛明轩 李鹏燕 许钊 陈思宇 MAO Mingxuan;LI Pengyan;XU Zhao;CHEN Siyu(State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《中国电机工程学报》2024年第20期8039-8048,I0010,共11页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：国家自然科学基金项目(52107177)。

摘　　要：为探究车辆阴影在路面光伏并网系统中导致并网电流出现间谐波的问题,提出基于元胞自动机的路面光伏并网系统动态模型。该文针对车辆阴影引起间谐波的现象,结合元胞自动机车辆模型,建立车辆阴影下路面光伏阵列模型,阐述光伏板串并联输出特性。然后,对路面光伏并网系统进行小信号建模,建立车辆阴影下路面光伏并网系统动态模型,分析动态随机车辆阴影下路面光伏并网系统间谐波与传统光伏的区别,通过多工况下的仿真,揭示车辆慢化概率和遮荫程度两个参数对间谐波幅频的变化规律。最后,搭建路面光伏发电系统平台,结果验证路面光伏系统间谐波的特性,为后续抑制车辆阴影带来的间谐波电流提供了理论基础。To investigate the problem of interharmonic in grid-connected currents caused by vehicle shadows in solar photovoltaic(PV)road grid-connected systems,this paper proposes a dynamical model of solar PV road grid-connected systems based on a cellular automaton.It addresses the phenomenon of random dynamics of vehicle shadowing,combines the cellular automata vehicle model,establishes a model of solar PV road arrays under vehicle shadowing,and illustrates the series-parallel output characteristics of PV panels.Then,the small signal modelling is carried out for the grid-connected system of solar PV road array to establish the dynamic model under vehicle shading,and the difference between interharmonic of solar PV road grid-connected system under dynamic stochastic vehicle shadows and conventional PV is analyzed.Through simulation tests under multiple working conditions,the variation laws of two parameters,namely vehicle slowing probability and shading degree,on the amplitude and frequency of interharmonic is revealed.Finally,a test platform of the solar PV road system is built,and the results verify the correctness of the theoretical analysis of this paper,providing a theoretical basis for the subsequent suppression of interharmonic currents brought about by vehicle shading.

关 键 词：路面光伏并网系统 车辆阴影 间谐波电流 慢化概率 遮荫程度 

分 类 号：TM615[电气工程—电力系统及自动化]