基于模糊控制与自适应步长相结合的光伏发电系统最大功率点跟踪研究

doi:10.11985/2017.03.005

摘要/Abstract

摘要：

光伏发电已逐渐得到人们的重视和使用,根据光伏电池输出特性非线性的特点,采用了模糊控制的方法来进行最大功率点的跟踪。本文搭建了光伏发电系统的仿真模型,设计了模糊控制器,并为了弥补传统步长算法在光伏发电系统最大功率点跟踪上的缺陷,采用了自适应步长调整法来自动调整被控量。通过与传统定步长、变步长的仿真结果进行比较,得出了基于模糊控制的自适应步长调整法,可以快速实现光伏发电系统的最大功率点的跟踪控制,并使输出一直维持在稳定值。

关键词: 光伏发电, 最大功率点跟踪, 模糊控制, 自适应步长调整法

Abstract:

Solar power generation has been gradually getting people's attention and using, according to the characteristics of the output characteristic of PV cells, the fuzzy control method is used to track the maximum power point, which makes up the deficiency of the traditional control method. The simulation model of the photovoltaic power generation system is built, the fuzzy controller is designed, and in order to make up for the defects of the traditional step size algorithm in the maximum power point tracking of photovoltaic generation system, the adaptive step size adjustment method is adopted to adjust the controlled volume automatically. By comparing the simulation results with the traditional fixed step size and variable step size, the adaptive step size adjustment method based on fuzzy control can realize the maximum power point tracking control of photovoltaic power generation system, and the output value has been maintained at a stable value.

Key words: Photovoltaic power generation, maximum power point tracking, fuzzy control, adaptive step size adjustment method

中图分类号:

TM73

万庆祝,张翃帆. 基于模糊控制与自适应步长相结合的光伏发电系统最大功率点跟踪研究[J]. 电气工程学报, 2017, 12(3): 33-40.

Qingzhu Wan,Hongfan Zhang. Research on Maximum Power Point Tracking of Photovoltaic Generation System Based on Fuzzy Control and Adaptive Step Combination[J]. Journal of Electrical Engineering, 2017, 12(3): 33-40.

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A				E
A	NB	NM	NS	NO	PO	PS	PM	PB
NB	PB	PM	PS	PS	NS	NS	NS	NS
NM	PB	PB	PM	PS	NS	NS	NS	NS
BS	PB	PB	PM	PS	NS	NS	NS	NS
PS	NS	NS	NS	NS	PS	PM	PB	PB
PM	NS	NS	NS	NS	PS	PM	PB	PB
PB	NS	NS	NS	NS	PS	PS	PM	PB

参数	典型值
最大功率P_m/W	59.9
峰值工作电流I_m/A	3.5
峰值工作电压U_m/V	17.1
短路电流I_sc/A	3.74
开路电压U_oc/V	21.0
短路电流温度系数K_t/(mA/℃)	2.06
开路电压温度系数K_T/(V/℃)	-0.07