摘要
在对光伏发电系统的电特性进行理论分析的基础上,基于模糊控制思想提出了一种将固定电压法和扰动观察法相结合的分段式光伏MPPT控制方法。通过对固定电压法经验分析确定最大功率点对应电压的取值范围,结合光伏电池的功率-电压特性曲线分析,将MPPT控制分为4个区段,在不同区段采取不同的控制策略,使光伏发电系统能够快速、稳定追踪最大功率。对所设计的分段式模糊控制系统进行了仿真研究,结果显示,系统运行稳定,能够快速响应并较好地追踪最大功率点。
This paper analyzes the electrical characteristics of PV system, presents a piecewise fuzzy MPPT control method with a combination between constant voltage method and perturbation and observation method. Through the analysis of the constant voltage method and the power-photovoltaic characteristic curve,determined the corresponding voltage range of maximum power point and divided the MPPT control into 4 sections, adopt different control strategies in different sections. A simulation study was conducted. The results show,the system is fast response and running stable,maximum power point tracking effect is good.
出处
《机电工程技术》
2015年第8期82-86,共5页
Mechanical & Electrical Engineering Technology
基金
广州市教育局协同创新重大项目(编号:13XT07)
关键词
分段模糊控制
光伏系统
MPPT
piecewise fuzzy control
photovoltaic system
MPPT
