讨论了一种考虑太阳光照强度及环境温度变化的光伏阵列数学模型及基于电导增量法的最大功率点跟踪(MPPT)算法,并基于该数学模型和MPPT算法在PSCAD中搭建了光伏阵列和MPPT控制器通用仿真模型,进而搭建了并网光伏发电系统仿真模型。分析了变光照强度下的光伏发电系统动态特性,证明了所建光伏发电系统并网逆变器控制策略的准确性和有效性。
This article discussed a mathematical photovoltaic array model considering the changes in solar fluctuation and temperature and the maximum power point tracking (MPPT) algorithms based on incremental conductance method. Then, based on the mathematical model and the MPPT algorithm the simulation models of photovoltaic array, MPPT controller and grid-connected photovoltaic power system, were built in PSCAD. The simulation results show the accuracy and effectiveness of the model.