A Study on the Photovoltaic Energy Storage System

• Main Authors: Lin Ming-Li, 林明立
• Other Authors: Wang Wen-Jieh
• Format: Others
• Language: zh-TW
• Published: 1998
• Online Access: http://ndltd.ncl.edu.tw/handle/75282267629899963653

碩士 === 國立臺灣科技大學 === 電機工程技術研究所 === 85 === A new photovoltaic energy storage system is designed and implemented in this thesis. This photovoltaic energy storage system is composed of the photovoltaic modules, charger, batteries, dc chopper, voltage source inverter and digital signal processor. A new maximum power point tracker based on the gradient method is proposed to improve the energy conversion efficiency. Then, the inverter based on the voltage space vectors pulse-width modulation is designed to minimize the current harmonic distortion. The constant V/F algorithm is used to control the speed of an induction motor. A digital signal processor is used to implement the maximum power point tracking algorithm and voltage space vectors pulse-width modulation. The simulation and experimental results show that maximum power point tracker proposed in this paper has the maximum power output and is robust to the external disturbances. Thus, the performance of the proposed method is superior than that of the conventional perturbation and observation method.