Nonlinear Phenomena of Boost DC-DC Converting Solar Cell System with Incremental Conductance Method for MPPT

• Main Authors: Wu, Sheng-Da, 吳昇達
• Other Authors: Hsieh, Fei-Hu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/19504198870692156552

碩士 === 龍華科技大學 === 電機工程系碩士班 === 103 === In recent years, carbon reduction is the trend of the world, and inexhaustible solar power is booming. The current efficiency of solar power generation is still low, so to improve the power generation efficiency will be the research objective to scientists all over the world. The maximum power point tracking (MPPT) is a way to improve efficiency. Existing maximum power point tracking method is more common of incremental conductance method, perturbation and observation method and voltage feedback method and so on. Because of the output voltage of the solar cell is lower than the normal one, this thesis choose boost DC - DC converter as the converter system, to enhance the output voltage of the solar cell. In this thesis the nonlinear phenomena of boost DC-DC converting solar cell system with incremental conductance method for MPPT, varying load resistance and reference current are studied. Considering converter operation in continuous conduction mode (CCM) with inductor current, Firstly the solar cell maximum power tracking system and converter working principle are explained. Secondly, the construction of solar maximum power tracking with incremental conductance method and boost DC - DC converter equivalent circuit model, then mathematical model is derived, and modeled and simulated by MATLAB / SIMULINK software package. Through the time-domain waveforms, phase plane and bifurcation diagrams, to explore the changing the load resistance and the reference current system from a periodic steady-state into the chaos of nonlinear phenomena, chaos evolution mechanism of the system is analyzed.