适用于无线传感器网络太阳能系统的MPPT算法

MPPT algorithm for wireless sensor network solar power system

结合无线传感器网络节点的工作特点及光伏供电系统特性,设计了一种新型光伏电池最大功率点跟踪算法。利用光伏电池物理特性中最大功率点随工作环境温度变化的事实,在无线传感器网络节点工作周期内将环境温度测量值引入跟踪算法中,实现系统最大功率点跟踪高可靠性、低复杂性、低成本及较高精度的目标。数学模型仿真及小型光伏电池实际测试结果均表明:该算法对最大功率点的跟踪效率达到91%以上,为无线传感器网络太阳能系统提供了可行的实现方法。

This paper describes a maximum power point tracking（MPPT） algorithm based on a wireless sensor network for photovoltaic cells.The maximum power point of a photovoltaic cell varies according to its working temperature.Therefore,environmental temperature measurements were combined with the wireless sensor network work cycle to achieve an accurate,reliable,simple and inexpensive maximum power point tracking system.Simulations and tests with a small photovoltaic cell both show that the efficiency of the maximum power point tracking algorithm is greater than 91%.