Research on DC Boost Type of Photovoltaic Power Generation System

2018 International Conference on Advanced Materials, Intelligent Manufacturing and Automation

材料科学;机械制造;运输工程

Sun, Shu^1 ; Liu, Junwei^1

Wuhan University of Technology, Wuhan, Hubei, China^1

关键词: Control strategies;    Maximum power point;    Maximum Power Point Tracking;    Optimal gradient methods;    Output characteristics;    Photovoltaic arrays;    Photovoltaic power generation systems;    System construction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/382/3/032045/pdf
DOI  :  10.1088/1757-899X/382/3/032045

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

For DC boosting photovoltaic power generation system, this paper mainly focuses on the theory studies, system construction and algorithm design from three aspects, such as photovoltaic array model and output characteristics, structure and principle of boost system, principle of maximum power point tracking and control method. According to the single peak of the P-U curve and the principle of maximum power point tracking, the maximum power point tracking scheme using the impedance transform function of the boost circuit and the adaptive algorithm is determined. Through the study and analysis of the control strategy of the conventional adaptive algorithm introduced the optimal gradient method, an improved adaptive algorithm that fuses the fixed voltage method, the fitting curve method and the optimal gradient method is proposed. The simulation system is established to verify the simulation. The corresponding experimental results prove the validity of the designed photovoltaic power generation system and the improved adaptive algorithm, which improve the speed and accuracy of maximum power point tracking, and solve the wrong judgment of maximum power point.