Development of Micro-Photovoltaic Power Conversion Systems

• Main Authors: Lau Shown Phang, 劉舜鵬
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/md6k7j

碩士 === 國立臺灣科技大學 === 電機工程系 === 99 === This thesis develops a micro-photovoltaic(PV) solar power system. The system contains a DC-DC power converter and a DC-AC power converter. DC-DC power converter uses a new high step-up ratio isolated DC-DC power converters to boost the output high voltage from solar cells. DC-AC power converter is a single-phase full-bridge inverter which can be either operated in stand-alone fashion with voltage control or connected with power grid using current control. In this thesis, a new feed-forward compensation with maximum power point tracking of PV system, together with current control mode are proposed to generate maximum solar power to the grid. Digital signal processor TMS320F28035 is used to control the system with voltages and currents. The overall system can be operated either in voltage or current closed-loop control. This system can not only connect to grid, but also has a power failure detection and restoration capabilities to achieve plug and play function. A 200W micro-PV solar power system is built with solar cell voltage 20V ~ 30V, AC side voltage 110V , 60Hz. The overall efficiency at full load is 0.94. The experimental results verify the feasibility of the proposed system.