基于环境参数模型的定电压MPPT控制算法研究

Research on the Algorithm of Constant Voltgae MPPT Control Method Based on Environmental Parameter Model

根据光伏电池模型和最大功率跟踪(MPPT)原理,提出了一种基于环境参数的最大功率工作点(MPP)电压模型,改进了固定电压跟踪法。该方法实现简单,可以快速稳定地找到MPP,解决了光伏电池跟踪效率和跟踪控制精度难以兼得的矛盾。实验证明,光伏电池环境参数模型演算合理,改进的固定电压跟踪法能快速准确地跟踪MPP,避免了扰动观察法带来的MPP附近振荡问题。

According to the PV cells model and control methods of maximum power point tracking （MPPT）, a new modified constant voltage tracking method based on the environmental parameter of maximum power operating voltage model is proposed.The method is easy to track the maximum power point（MPP）,and it solves the contradiction be- tween the control efflency and control precision.The experimental results prove that the model is advisable and the modified method can track the maximum power point quickly and accurately.The proposed method can effectively pre- vent operation point from fluctuating contrast to perturb and observe method.