Title :
A New Single-Phase HF-Link Multilevel Inverter
Author :
Beristáin, J. ; Bordonau, J. ; Raventos, O. ; Rocabert, J. ; Busquets, S. ; Mata, M.
Author_Institution :
Dept. of Electr. Eng., Instituto Tecnologico de Sonora
Abstract :
This paper introduces a new single-phase multilevel inverter with HF isolation and bi-directional power flow capability. The advantage is to provide compact HF isolation, without an additional dc-stage and with lower harmonic distortion in the load. Typical applications of this converter are: photovoltaic systems, fuel cell systems and small wind power systems. The topology is based on a high-frequency push-pull inverter, a high-frequency transformer and an ac/ac multilevel converter. A detailed HF-link multilevel inverter description is presented. A modulation strategy and a commutation strategy for the ac/ac converter is proposed with the benefits of soft-switching commutations with no extra components. The multilevel topology permits a significant reduction of the output filter and an improvement of the efficiency
Keywords :
AC-AC power convertors; commutation; fuel cell power plants; harmonic distortion; high-frequency transformers; invertors; load flow; modulation; photovoltaic power systems; wind power plants; HF isolation; ac-ac multilevel converter; bi-directional power flow capability; commutation strategy; fuel cell systems; high-frequency push-pull inverter; high-frequency transformer; lower harmonic distortion; modulation strategy; output filter reduction; photovoltaic systems; single-phase HF-link multilevel inverter; small wind power systems; soft-switching commutations; Bidirectional control; Filters; Fuel cells; Hafnium; Harmonic distortion; Inverters; Load flow; Photovoltaic systems; Topology; Wind energy;
Conference_Titel :
Power Electronics Specialists Conference, 2005. PESC '05. IEEE 36th
Conference_Location :
Recife
Print_ISBN :
0-7803-9033-4
DOI :
10.1109/PESC.2005.1581630
