一种基于电导增量法的MPPT实现策略

摘要

The output power of photovoltaic array changes with the ambient factors. In order to utilize the solar battery more efficiently, the maximum power point tracking(MPPT) is needed.The article analyses the operational features of photovoltaic cells, the topology and operation principle of photovoltaic system. It applies conductance increment method on the eontrol of photovoltaic system MPPT, accelerating the system response to the ambient changes to enable the system to maintain the maximum power point. As a result, the method is proved by means of simulation and experiments.%太阳能光伏阵列的输出功率随外界环境因素的变化而变化,为了能高效地利用太阳能电池,需对光伏阵列进行最大功率点跟踪(Maximum Power Point Tracking,简称MPPT).分析了太阳能电池的工作特性和光伏系统的拓扑结构及原理,将电导增量法应用到光伏发电系统MPPT的控制中,使系统能够快速响应外界环境的变化,让光伏发电系统始终工作在最大功率点.最后通过仿真及实验证明了该方法的可行性.