Comparison of the Variable Step-Size Maximum Power Point Tracking Methods for Solar Cells

• Main Authors: CHEN-YU LAI, 賴振鈺
• Other Authors: Yi-Hua Liu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/29136618900403216579

碩士 === 國立臺灣科技大學 === 電機工程系 === 103 === Conventional fixed step-size maximum power point tracking (MPPT) methods exhibit a trade-off between tracking speed and tracking accuracy. By contrast, variable step-size MPPT techniques can achieve satisfactory tracking accuracy and speed while maintains advantage of simple calculation. This thesis aimed to study the performance of three different variable step-size Perturb and Observe MPPT techniques. Initially, a MATLAB based photovoltaic generation system (PGS) model is developed and validated. Then, variable step-size MPPT methods are compared in terms of various indices such as steady state power, rise time, settling time and steady-state tracking accuracy under various operating conditions. In addition, the tuning procedure of the parameters for each method is also proposed. Finally, advantages and disadvantages of each method are then summarized and relevant design suggestions are proposed.