一种改进的光伏发电系统MPPT控制方法

摘要

目前光伏系统最大功率点跟踪(MPPT)控制方法很多,介绍了3种常用的MPPT控制方法:固定电压法、扰动观察法和电导增量法,并通过仿真比较了其启动时间、动态响应速度和稳态精度,在此基础上提出了一种改进的MPPT控制方法——固定电压结合扰动观察法.仿真结果表明,该方法响应速度快,稳态精度高.%A lot control methods of Maximum Power Point Tracking (MPPT) are proposed in the photovoltaic system currently. Three typical MPPT control methods are described in this paper,and their starting time,dynamic response and steady-state accuracy are compared in the simulation. An improved control method,combining constant voltage algorithm with perturb-observe algorithm, is proposed finally. The simulation results show that the method is provided with quickly response and high steady-state accuracy.