A Novel Three-port Inverter with Flying-capacitor

• 作 者: Fang G.S. Chen J.F. Chang P.S.
• 机 构: National Cheng Kung University,Tainan,Taiwan
• 出 处: 中国电工技术学会电力电子学会第十四届学术年会
• 发表日期: 2014年6期
• 关键词: Three-port Multi-level inverter Flying-capacitor

　　The micro-inverters using decoupling circuit are popular for stand-alone renewable system applications recently because the three-port interface makes the system more flexible.And the multi-level inverters are particularly interesting for high power applications because of the low total harmonic distortion performance without increasing the switching frequency.By combining the three-port concept and the multilevel inverter technique,a novel three-port inverter is proposed in this paper.The proposed topology can achieve three-port single-stage interface,charging regulator and high-power application simultaneously.Besides the topology have the advantage of the low switch voltage stress and less component.Finally a prototype of the inverter with an input port for 400 Vdc voltage source,a bidirectional port for 100V battery,and an AC output port for 120 Vac is implemented and verify the theoretical analysis.The experimental results: The efficiency in SISO is up to 98.1%.And the system efficiency is up to 98.1% and 98.7% in both DISO and SIDO modes.