A grid-tied power conversion interface with a five-level inverter

作者：Wu Jinn Chang^*; Jou Hurng Liahng; Chen Yung Lin

来源：IET Power Electronics, 2017, 10(13): 1721-1728.

DOI：10.1049/iet-pel.2017.0091

• power conversion
• invertors
• renewable energy sources
• grid-tied power conversion interface
• five-level inverter
• renewable energy source
• H-bridge inverter
• selection switch set
• boost power converter
• utility voltage
• AC power
• power conversion efficiency
• power electronic switches
• power circuit

This study proposes a novel grid-tied power conversion interface that connects a renewable energy source to the utility. The proposed grid-tied power conversion interface is composed of an H-bridge inverter, a selection switch set and a boost power converter. The proposed grid-tied power conversion interface generates a five-level AC voltage. The boost power converter is only operated when the magnitude of the utility voltage is greater than the voltage of the renewable energy source. A part of the power from the renewable energy source is directly converted to AC power via the selection switch set and the H-bridge inverter. Therefore, the power conversion efficiency of the proposed grid-tied power conversion interface is improved. The proposed grid-tied power conversion interface contains only six power electronic switches so the power circuit is simplified. The performance of the proposed grid-tied power conversion interface is verified experimentally.

• 出版日期2017-10-27