关键词: 太阳能电池, 最大功率点跟踪, 固定电压法, 扰动观察法

Abstract:

In order to improve the efficiency of the solar LED Lighting system,it is important to detect the solar battery output power in real time and ensure the solar battery always works at the maximum power point.This paper briefly describes the output characteristic of the solar battery and the principles of tracking maximum power point,and analyzes several tracking methods,i.e.the constant voltage algorithm,the perturb-observe algorithm and the conductance increment algorithm.And an improved algorithm that combines the constant voltage algorithm and perturb-observe algorithm is put forward to solve the problems of slow tracking,oscillating phenomenon,etc.by traditional methods.It makes good use of their respective advantages to achieve fast tracking and further improve the utilization efficiency of solar battery.

Key words: solar battery;maximum power point tracking;constant voltage algorithm;perturb-observe algorithm