Half-Wave Cycloconverter-Based Photovoltaic Microinverter Topology With Phase-Shift Power Modulation

A grid-connected microinverter with a reduced number of power conversion stages and fewer passive components is proposed. A high-frequency transformer and a series-resonant tank are used to interface the full-bridge inverter to the half-wave cycloconverter. All power switches are switched with zero-...

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Bibliographic Details
Published inIEEE transactions on power electronics Vol. 28; no. 6; pp. 2700 - 2710
Main Authors Nayanasiri, D. R., Vilathgamuwa, D. M., Maskell, D. L.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.06.2013
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Capacitors
Components
Electrical equipment
Full-bridge inverter
half-wave cycloconverter
Inverters
microinverter
phase-shift power modulation
Photovoltaic cells
series-resonant circuit
Simulation
Solar power generation
Switches
Switching
Switching frequency
Topology
Transformers
Zero voltage switching
zero-voltage switching (ZVS)
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Summary:A grid-connected microinverter with a reduced number of power conversion stages and fewer passive components is proposed. A high-frequency transformer and a series-resonant tank are used to interface the full-bridge inverter to the half-wave cycloconverter. All power switches are switched with zero-voltage switching. Phase-shift power modulation is used to control the output power of the inverter. A steady-state analysis of the proposed topology is presented to determine the average output power of the inverter. Analysis of soft switching of the full-bridge and the half-wave cycloconverter is presented with respect to voltage gain, quality factor, and phase shift of the inverter. Simulation and experimental results are presented to validate the operation of the proposed topology.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2012.2227502