| Summary: | 碩士 === 龍華科技大學 === 電機工程研究所 === 96 === Along with the improvement of human standard of living, the requirement of energy sources is increasing as the standard of living advances. The amount of the traditional energy such as petroleum and coal has been gradually becoming insufficient to meet the demand. The problem of energy crisis stimulates fast development of renewable energy to accommodate the new environment worldwide. The technology of generating electric power using solar energy have been the most popular technology people attend to apply, because of its advantages of the energy saving and environmental protection.
First, the history, categorization and system of solar cells are introduced in this thesis. And then, the output characteristics of the solar cells are analyzed. Several maximum power point tracking (MPPT) theories has been compared and discussed, and the perturb & observe method has been choosen to use in this thesis in this foundation. The principles of three DC-DC converters are also analyzed and compared, and the DC-DC boost converter has been choosen to be the maximum power point tracker in the photovoltaic system model.
In this thesis, the Matlab/Simulink software is chosen to build the model for the solar modules under different temperature and irradiance situations. Besides, the DC-DC boost converter cooperated with perturb & observe method has been used to establish the model of solar modules system with the function of maximum power point tracking. According to the comparisons of simulation results, the model built in this thesis could track the maximum power point of the system accurately, and the accuracy and practicability of the model is also validated. The establishment of this system facilitates the students who are studying the concepts and applications of the solar energy system to solve the problems in class, and helps them to overcome any obstacle all way.
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