基于初值设定双模式电导增量法光伏MPPT研究

An MPPT Algorithm for PV Systems Based on Dual-Mode INC with Initial Setting

在农业生产中利用光伏发电为智能设备提供电能是精准农业发展的趋势之一,为提高单位时间光伏系统发电量,针对光伏发电系统最大功率点跟踪(MPPT)算法在跟踪速度和精度上难以兼顾的问题,提出了一种初值设定双模式电导增量法.实验表明:相比于现有MPPT算法,本算法缩短了MPPT寻优时间,提高了系统稳态运行和环境突变两种情况下的最大功率点追踪效率ηMPPT和电能提高百分比ζMPPT,同时减少了跟踪震荡,有效提高了系统跟踪速度和精度.

The use of photovoltaic power generation in agricultural production to provide power to smart devices is one of the trends in the development of precision agriculture.In the MPPT(maximum power point tracking)scheme employed in photovoltaic power generation systems,it is difficult to balance tracking speed and precision.In this paper,a new modified dual-mode INC scheme with initial setting is proposed to improve the per-unit time power generation of the system.Experiments show that the modified scheme has effectively enhanced the tracking speed and reduced the turbulence in the process of MPPT compared with the existing MPPT techniques.At the same time,the modified scheme has improved the maximum power point tracking efficiency and the percentage of power increasing.