The Research Of Solar Energy Photovoltaic Generation System

At present, while most countries all over the world are developing green and renewable energy, solar energy is accepted commonly because of its unusual advantages. Photovoltaic (PV) systems are paid more attention to among its various applications. With price reduction of PV modules and development of PV technology, the role of PV generation systems is gradually changed from supplemental energy to substitute energy. And stand-alone and grid-connected PV generation systems will be the trend among PV applications. This paper deals with such key problems as true maximum power point tracking (TMPPT) of PV array and optimum management of battery, improvement of inverter output wave, islanding effect and so on by establishing related simulation models, applying novel control strategies and experiments validation. The more details about author's work are as follows:1) Clarified the different structure of photovoltaic power generation system performance and characteristics.2) Analysised the use and the characteristics of the battery, a detailed description of the battery charger on the battery charging method capacity and the impact of life, with the final design of a single-chip microcomputer with a simple temperature protection and three of the battery charger Chargers.3) Analysised the work of the solar cell characteristics of a solar cell was maximum power point method. More detailed elaboration of the set voltage tracking, observation and disturbance Hysteresis comparison, the final detailed explanation of the use fuzzy logic control the maximum power point method.4) Analysised the working principle and the control method of the inverter, explained the working principle and operating characteristics of the PWM, using MATLAB simulation of a PWM waveform generator inverter and the work of waveforms, the last produced by single-chip of STC adjustable duty cycle of the PWM waveform generator. 5) Design of a solar-powered device control system, including collecting temperature, time, data storage, the design of the LCD chips used to display the data.