Title :
A phase-modulated high-frequency isolated dual LCL DC/AC converter
Author :
Li, Xiaodong ; Bhat, Ashoka K S
Author_Institution :
Univ. of Victoria, Victoria, BC, Canada
Abstract :
A phase-modulated high-frequency isolated DC/AC converter is proposed for a PMSG-based grid-connected wind generation application. The converter includes two full-bridge HF LCL-type resonant inverters working at fixed duty cycle. The power control is realized by means of the phase shift between the two bridges. With the LCL-type resonant tank, zero-voltage-switching is achieved for all switches for the whole power range. With the phase shift modulated sinusoidally, a 120 Hz rectified output current is obtained, which is unfolded and fed to the single-phase utility line. The analysis is verified with computer simulation results. Experimental data based on a 500 W prototype circuit is included for validation purpose.
Keywords :
DC-AC power convertors; permanent magnet generators; phase modulation; resonant invertors; switching convertors; synchronous generators; wind power plants; zero voltage switching; LCL-type resonant tank; PMSG-based grid-connected wind generation; fixed duty cycle; frequency 120 Hz; full- bridge HF LCL-type resonant inverters; phase-modulated high-frequency isolated DC/AC converter; power 500 W; power control; single-phase utility line; zero-voltage-switching; dc/ac converter; high-frequency isolation; resonant converter; utility interface; wind generation;
Conference_Titel :
Energy Conversion Congress and Exposition, 2009. ECCE 2009. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-2893-9
Electronic_ISBN :
978-1-4244-2893-9
DOI :
10.1109/ECCE.2009.5316440
