Title :
A Comparison Study of High-Frequency Isolated DC/AC Converter Employing an Unfolding LCI for Grid-Connected Alternative Energy Applications
Author :
Xiaodong Li ; Bhat, Ashoka K. S.
Author_Institution :
Fac. of Inf. Technol., Macau Univ. of Sci. & Technol., Taipa, China
Abstract :
A high-frequency (HF) isolated dc/ac converter including an unfolding line connected inverter can be used as the interface between a small-scale alternative energy generation system and the utility line. This paper presents the review of operation of several different topologies of HF isolated dc/ac converters. They are designed for illustration purpose and compared for their performance. It is found that the dual-LCL series resonant dc/ac converter can maintain zero-voltage switching (ZVS) operation for all switches with low line-current total harmonics distortion (THD) and high efficiency. Experimental results on a 500-W prototype converter are included for validation purpose.
Keywords :
DC-AC power convertors; energy resources; frequency convertors; harmonic distortion; invertors; power grids; resonant power convertors; zero voltage switching; HF dc-ac converter; LCI; THD; ZVS operation; dual-LCL series resonant converter; grid-connected alternative energy applications; high-frequency isolated dc-ac converter; line connected inverter; low line-current total harmonics distortion; power 500 W; prototype converter; utility line; validation purpose; zero-voltage switching operation; Bridge circuits; Frequency control; Frequency conversion; Hafnium; Inverters; Resonant frequency; Topology; Alternative energy generation; grid connection; high-frequency (HF) isolation; resonant converters;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2013.2296612
