The Study of a Symmetric Multi-level Inverter

• Main Authors: Jen-Jie Shiau, 蕭振傑
• Other Authors: Horng-Yuan Wu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/98971062818584509200

碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 101 === The thesis presents a multilevel inverter for the photovoltaic power system. The multi-level inverter architecture is composed of several full-bridge inverter modules in series. The thesis uses a digital sine pulse width modulation (DSPWM) technology to control each level of unipolar full-bridge inverters which is implemented by a micro-controller (dsPIC 30F4011) and a programmable logic device (PLD). In comparison with the traditional two-level inverter, the multilevel inverter is able to operate at a lower switching frequency and have the advantage of lower current ripple. The thesis investigates each part and the digital control architecture of the multi-level inverter. First, the proposed inverter is simulated and analyzed by the Matlab software. Finally, a nine level inverter with the digital switches is implemented by a micro-controller and a programmable logic device. The experimental results show the feasibility of the proposed converter. Keywords: sine pulse width modulation(SPWM)、Multi-level Inverter、Full-bridge Inverter.