A Photovoltaic Energy Generation System with Inverter Fault Detection

• Main Authors: Xian-Xi Ruan, 阮憲熙
• Other Authors: Wen-Jieh Wang
• Format: Others
• Language: zh-TW
• Published: 2000
• Online Access: http://ndltd.ncl.edu.tw/handle/27291154349415737417

碩士 === 國立臺灣科技大學 === 電機工程系 === 88 === 　　This thesis presents the design and implementation of a photovoltaic energy motor drive system and utility grid connection system with the inverter fault detection function. The system is composed of the photovoltaic modules, batteries, DC chopper, voltage source inverter and digital signal processor. This system uses a maximum power point tracking technique based on the gradient method to continuously apply the maximum power of the photovoltaic modules. The output power of the photovoltaic modules is used as the input voltage of the battery charger and the voltage source inverter. The charge equalization technique for series connected battery strings is adopted to charge the batteries. The voltage space vectors pulsewidth modulation method is used to minimize the current harmonic distortion and effectively utilized DC bus voltage of inverter. Moreover, a diagnosis method based on the output current of the inverter is used to detect the inverter faults. Utilizing voltage source inverter, the photovoltaic system can deliver power to the utility, and it can help to reduce the summer peak power supplied from utility equipment. Finally, the experimental results are provided to show the performance of the photovoltaic system and verify the feasibility of the proposed system.