基于功率差变步长扰动观察法的MPPT控制算法

MPPT control algorithm based on power difference variable step-size disturbance observation method

针对现有变步长扰动观察法在模型复杂影响响应速度和环境适应范围的问题,提出了基于功率差的变步长扰动观察法。从光伏发电的数学模型出发,对算法进行了理论推导,证明了功率控制在响应速度、适应范围的优势。通过仿真对本方法与定步长、变步长、模糊控制方法进行了对比分析,验证了算法的性能。所提出的算法易于工程实现,可为今后光伏系统最大功率控制提供技术参考。

Aiming at the problems that the existing variable step-size disturbance observation method has a complex influence on the response speed and the environment adaptation range in the model,a variable step-size disturbance observation method based on the power difference is proposed.Starting from the mathematical model of photovoltaic power generation,a theoretical derivation of the algorithm was performed,which proved the advantages of power control in response speed and adaptation range.Through simulation,the algorithm is compared with fixed step-size,variable step-size,and fuzzy control method to verify the performance of the algorithm.The algorithm proposed in this paper is easy to implement and it can provide a reference for the maximum power control of photovoltaic systems in the future.