Study on a maximum power point tracking controller for photovoltaic panels

International Conference on Applied Sciences

自然科学（总论）

Popa, G.N.^1 ; Dini, C.M.^1 ; Iagr, A.^1 ; Deaconu, S.I.^1

Politehnica University of Timisoara, Department of Electrical Engineering and Industrial Informatics, 5 Revolution Street, Hunedoara

331128, Romania^1

关键词: 8-bit microcontrollers;    Electrical characteristic;    Electronic converters;    Maximum power point;    Maximum Power Point Tracking;    MOSFET transistors;    Operating condition;    Photovoltaic panels;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/477/1/012030/pdf
DOI  :  10.1088/1757-899X/477/1/012030

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

The maximum power point tracker is a DC-DC electronic converter that optimizes the match between the solar array (photovoltaic panels) and the battery bank (stand-alone type) or utility grid (grid-tie type). They convert a higher and variable voltage DC output from photovoltaic panels down to the lower voltage needed to charge batteries or for on-grid inverters. The MPPT controller depends on the operating conditions of the photovoltaic panels, but also on the electrical characteristics of the electrical loads. The aim of the MPPT controller is to keep the operating point as close to the maximum power point. The paper presents a MPPT controller with 8-bit microcontroller. The microcontroller monitors the voltage and current of the photovoltaic panel as well as charging the battery. The controller is a buck converter, having a P channel MOSFET transistor. A microcontroller that also manages the charging of the batteries with the three charging stages, bulk, absorption, float and, also, the manual equalization option. Also, the battery bank is monitoring by measuring the temperature with a NTC thermistor.