Research on Maximum Power Point Tracking of Photovoltaic Generation System Based on Fuzzy Control and Adaptive Step Combination

doi:10.11985/2017.03.005

Abstract

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

CLC Number:

TM73

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