光伏并网发电系统最大功率跟踪新算法及其仿真

根据光伏阵列的特性,开发了光伏阵列的通用仿真模型,该模型可以模拟任意日照和温度下光伏电池的输出特性.分析了光伏并网发电系统最大功率跟踪的算法,针对最常用的最大功率跟踪方法--扰动观察法的不足,提出了一种新的最大功率跟踪的新算法.在Matlab/Simulink下进行了建模与仿真.仿真结果表明该方法在一定程度上可解决光伏电池输出非线性的问题,有效地避免跟踪的偏差,能够准确地跟踪太阳能电池的最大功率点,有效地提高光伏电池的输出效率,其动态响应速度快,使光伏系统具有良好的动态和稳态性能.

Simulative research of MPPT for photovoltaic power system

According to its character,a versatile simulation model of photovoltaic array is developed,which can simulate the output characteristics under any sunshine and temperature conditions.The MPPT(Maximum Power Point Tracking) algorithms of photovoltaic power system are analyzed,based on which a MPPT algorithm is presented to improve the widely used perturb -and -observe method.Its model is established and simulated with Matlab/Simulink.Simulation results show that,the improved MPPT algorithm can solve the non -linear output problem of the photovoltaic power system,avoid tracking deviation and enhance output efficiency.Its fast response speed improves the static and dynamic performance of photovoltaic power system.