Design and Implementation of Converter for Grid-Connected Single-Phase Photovoltaic Energy Conversion System

• Main Authors: Chung-Lun Huang, 黃崇倫
• Other Authors: Chih-Chiang Hua
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/2y36bz

碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 96 === This thesis presents the design and implementation of converters for the grid-connected single-phase photovoltaic energy conversion system. In order to provide the functions of the energy management and the load distribution, the system is combined with the photovoltaic cells and utility network. Due to that the output voltage and current of the photovoltaic cells are easily changed by light and load fluctuations, it will cause the maximum power points drift. Therefore, the maximum power point tracking and power electronic technique are required to draw the available maximum power from the photovoltaic cells. The proposed system makes use of the perturbation-and-observation method to achieve maximum power point tracking. The output frequency, phase and amplitude of the single-phase inverter are the same with utility network by using the zero-crossing control method. Therefore, it can match the condition of the grid-connected system. A digital signal processor is applied for the system control. Finally, a 500W generation system is constructed and tested to verify the system performance.