The Research of Grid-Connected Photovoltaic System by Combining Incremental Conductance MPPT Technique and Three-Level Inverters

• Main Authors: Chien-Fu Chen, 陳建甫
• Other Authors: 陳昭榮
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/bc9re4

碩士 === 國立臺北科技大學 === 電機工程系研究所 === 101 === As the energy and environmental problems increase more seriously, the renewable energy techniques are continuously developing. Without doubt, one of the most significant representatives is photovoltaic generation. Considering the implications of complexity and limitation by establishing the photovoltaic system, this study adopts the simulation software to build the dynamic model which is to research the issues about the photovoltaic system grid-connected operation. This study proposes mathematical model and control strategy to research on three-phase grid-connected photovoltaic system. Firstly, Mathematical model attempts to establish photovoltaic array, boost converter, and three-phase three-level inverter. Secondly, control strategy utilizes Incremental Conductance MPPT Technique and three-phase three-level inverter which adopts current control method to maximize the photovoltaic array output power, stabilize the DC-link voltage of a three-phase three-level inverter, and export three-phase AC to utility power grid. This study establishes 100 kW photovoltaic system to simulate and analyze the operation characteristic in diverse environments by using Matlab/Simulink simulation software. Therefore, the results prove that the feasibility of using mathematical model and control strategy. Moreover, the simulation results shows the photovoltaic system with well adaptability and performance within dynamic environment.