基于Matlab的三相光伏并网发电系统的建模与仿真

Modeling and simulation of three-phase grid-connected photovoltaic power system based on software Matlab

基于Matlab软件平台建立了适用于工程计算的光伏电池模型,用电导增量法实现光伏系统的最大功率点跟踪,采用恒功率(PQ)法控制逆变器,在此基础上搭建了完整的光伏并网发电系统运行与控制模型。仿真结果表明,该模型能较好地反映三相光伏并网系统运行的特性,跟踪系统的动态输出,保证光伏并网发电系统稳定运行。

Based on Matlab software platform,a photovoltaic cell model suitable to engineering calculation was established. The conductance increment method was used to realize the maximum power point tracking. The constant power control method(PQ)was used to control the inverter. Based on these,a complete operation and control model of the grid-connected photovoltaic power system was established. The simulation result shows that the model can reflect the operation characteristics of three-phase grid-connected photovoltaic power system better and can track the dynamic output of the system,which is helpful to ensure the photovoltaic grid-connected power system to operate stably.