摘要
为了在易实现、低成本前提下提高光伏系统最大功率跟踪(maximum power point tracking,MPPT)控制的快速性,以经典的扰动观察(perturbation and observation,P&O)法为基础,提出了一种模糊变步长扰动观察MPPT控制方法.该方法以实际检测电压与最大功率点(maximum power point,MPP)处所对应电压之间的距离为模糊控制器输入信号,再以模糊控制器的变步长输出进行扰动观察寻优.该方法实现了多种MPPT方法的协调工作,从而达到了它们之间的优势互补.最后,仿真实验证实:该方法能够在辐照度快速变化、温度快速变化和负载快速变化的情况下,均获得良好的MPPT快速性性能.
In order to improve the MPPT rapidity of photovoltaic （PV） system with easy implementation and low cost, a fuzzy variable-step P＆O method is proposed on the basis of the conventional P＆O method. In this method, the difference between measured actual voltage and its value at the MPP is used as the input of the fuzzy controller and its output whose step is variable is used as the control signal of searching the MPP.Finally,some simulation experiments are conducted to verify that,with this proposed method,the better MPPT rapidity performance can be implemented regardless of the varying irradiance,temperature or load.
作者
平爱红
李绍武
PING Aihong;LI Shaowu(School of Information Engineering,Hubei University for Nationalities,Enshi 445000,China;School of Electrical and Information Engineering,Science and Technology College of Hubei University for Nationalities,Enshi 445000,China)
出处
《湖北民族学院学报（自然科学版）》
CAS
2018年第2期203-207,共5页
Journal of Hubei Minzu University(Natural Science Edition)
基金
湖北省教育厅科研项目(B2016494)
