Title :
An improved soft-switching single-phase inverter for small grid-connected PV-system
Author :
Amorndechaphon, Damrong ; Premrudeepreechacharn, Suttichai ; Higuchi, Kohji
Author_Institution :
Dept. of Electr. Eng., Chiangmai Univ., Chiang Mai
Abstract :
In order to increase the conversion efficiency of grid-connected PV-systems, a high-efficiency PV power inverter with simple control methodology is required. To satisfy this requirement, an improved single-phase inverter using soft-switching technique is proposed. The proposed power inverter circuit is composed of a ZVT-PWM boost dc-dc converter and a LLCC resonant inverter. The dc-link voltage amplitude is controlled by ZVT-PWM boost dc-dc converter with soft-switching transition for all active switches. The stable sinusoid ac output voltage is inverted from dc-link voltage via a LLCC resonant inverter. The effectiveness of the proposed grid-connected inverter for small PV system is verified by simulation results.
Keywords :
DC-DC power convertors; PWM power convertors; machine control; photovoltaic power systems; resonant invertors; voltage control; LLCC resonant inverter; PV power inverter; ZVT-PWM boost dc-dc converter; dc-link voltage amplitude control; grid-connected PV-system; soft-switching single-phase inverter; Costs; DC-DC power converters; Mesh generation; Photovoltaic systems; Power semiconductor switches; Pulse width modulation inverters; Resonant inverters; Switching converters; Switching loss; Zero voltage switching;
Conference_Titel :
Industrial Electronics, 2008. IECON 2008. 34th Annual Conference of IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-1767-4
Electronic_ISBN :
1553-572X
DOI :
10.1109/IECON.2008.4758285
