基于非对称论域模糊控制的光伏阵列最大功率点跟踪研究

摘要

最大功率点跟踪(MPPT)是提高光伏发电系统效率的关键技术.在分析光伏阵列非线性输出特性的基础上,对基于非对称论域模糊控制实现光伏阵列MPPT进行探讨；建立了采用非对称论域模糊控制算法调节Boost电路占空比实现光伏阵列MPPT的仿真模型,在照度、温度阶跃变化下的仿真结果,验证了非对称论域模糊控制算法的有效性.%The maximum power point tracking (MPPT) is a key technology to increase the efficiency of photovoltaic power system. This paper analyses the nonlinear output characteristics of the photovoltaic array, investigates a asymmetric fuzzy control for the MPPT in photovoltaic power systems and establishes the simulation model of the photovoltaic power system that the asymmetric fuzzy. Controller is used to adjust the duty factor of Boost circuit. The simulation results show that when illumination intensity or environment temperature has a step change, the photovoltaic power system can realize the MPPT, this verifies the effectiveness of the asymmetric fuzzy controller.