摘要
通过对光伏电池数学模型和输出特性的研究,针对传统扰动观察法在跟踪后期易产生功率振荡的现象,提出一种自适应模糊PID控制的最大功率点跟踪方法。论述了该方法的跟踪原理、控制器的结构和参数的确定,并通过Matlab/Simulink平台建立了以占空比步长为直接控制量的最大功率点跟踪模型。试验结果表明,该控制方法能迅速感知外界环境变化,并能快速准确地跟踪到最大功率点,且在最大功率点附近不会产生功率振荡的现象,有效地提高了光伏电池的发电效率,实现了快速性和精确性的兼备,是一种较为理想的跟踪方法。
According to the study on mathematical model and output characteristic of photovoltac panel, for the power oscillationappeared in the latter part of observation method, adaptive fuzzy PID control is proposed to realize MPFF （maximum power point tracking）, the principle of control method, the controller structure and the parameter definition arc analyzed, the tracking model that takes the step-size of duty cycle as the control variable directly is built through MATLAB/Simulink. Experimental resuhs show that this control method is ideal which can sense the extemal environment quickly and track the maximum power point accurately without power loss, improve the power generation efficiency ＆ realize good accuracy and rapidity.
出处
《陕西电力》
2015年第7期7-10,共4页
Shanxi Electric Power
基金
中央高校基本科研基金(2013B08914)
江苏省输配电装备技术重点实验室开放式基金(2011JSSPD13)
关键词
光伏电池
输出特性
自适应
模糊PID控制
最大功率点跟踪
占空比
photovoltaic panel
output characteristic
adaptive
fuzzy PID control
maximum power point tracking
duty cycle
