基于指数变步长扰动观察法的光伏MPPT控制策略

摘要

提高光伏发电的效率是光伏系统的重点,因此需要对光伏系统的最大功率点进行实时跟踪,使光伏系统持续工作在最大工作点处.为了提高光伏系统跟踪的快速性和稳定性,提出了一种基于指数变步长扰动观察法的最大功率点跟踪算法.MATLAB仿真验证结果表明,该算法能够实时对光伏组件进行快速跟踪,并且在外界条件剧烈变化时能提高动态响应和系统稳定性,减小稳态时功率损失.%Improving the efficiency of photovoltaic power generation is the focus of the photovoltaic system.Therefore,the maximum power point of the PV system is required for real-time tracking,so that the PV system continues to work at the maximum operating point.In order to improve the speed and stability of tracking,a exponential variable step perturbation method was proposed for maximum power point tracking.The MATLAB simulation results show that the proposed algorithm can quickly track the PV modules in real time and can improve the dynamic response and stability of the system when the external conditions change.