基于自寻优+PI算法的最大功率点跟踪

Maximum power point tracking based on automatic optimization +PI algorithm

为了提高太阳能光伏发电系统的效率与稳定性,需要对光伏电池的最大功率点进行跟踪控制。建立了光伏电池和DC/DC变换电路的数学模型,对比分析了电导增量法和扰动法,提出了一种自寻优+PI的控制方法。仿真表明,自动寻优+PI控制算法能够快速、准确地跟踪到最大功率点位置,并且解决了常用方法所带来的稳定性差的问题,提高了太阳能光伏发电系统的稳定性与能量的利用效率。

In order to improve the stability and efficiency of solar photovoltaic power generation systems, it needs to track the maximum power point of photovoltaic cell. The mathematical models of the photovoltaic cells and DC/DC conversion circuit were set up. Through comparing incremental conductance method and perturbation method of observation, a kind of automatic optimization + PI control method was proposed. The simulation results show that the automatic optimization +PI control algorithm can quickly and accurately track the maximum power point, solve the poor stability of common methods and improve the stability of solar photovoltaic power generation system and energy utilization efficiency.