基于二分法的光伏发电系统最大功率跟踪算法

摘要

The conversion efficiency of photovoltaic （PV） cell is low at present. Maximum power point tracking （MPPT） for PV cell is necessary to use PV cell effectively. Conventional MPPT arithmetic has disadvantages such as low precision, poor adaption and low tracking efficiency in quickly tracking MPP. A variable step arithmetic is adopted to track maximum power point based on dichotomy. Simulation results reveal that the method could improve the tracking precision, speed and stability of MPPT.%目前光伏电池的光电转换率较低，为有效利用光伏电池，需要对光伏发电系统进行最大功率跟踪，常规的跟踪算法在快速跟踪最大功率点的过程中存在精度低、适应性差和跟踪效率低等弱点，论文基于二分法思想，采用变步长算法快速跟踪最大功率点，仿真结果证明该方法不仅增加了最大功率点跟踪的精度，而且提高了跟踪的速度与系统的稳定性。