NDLI: Zero-Voltage-Transition Full-Bridge Topologies for Transformerless Photovoltaic Grid-Connected Inverter

Content Provider	IEEE Xplore Digital Library
Author	Xiao, H.F. Liu, X.P. Lan, K.
Copyright Year	1982
Abstract	Low leakage current and high efficiency are two key indexes for the transformerless photovoltaic (PV) grid-connected inverter. The transformerless inverter topologies have superior efficiency owing to saving the transformer, but their switches are still on a hard-switching state at present. This paper presents a novel zero-voltage transition (ZVT) concept for the full-bridge transformerless PV grid-connected inverter topologies. The zero-voltage turn-on and turnoff of the high-frequency main switches and the zero-current turn-on of the auxiliary switches, as well as the zero-voltage turn-on and turnoff of the antiparallel diodes of the line-frequency switches, are realized by introducing two resonant tanks. Take ZVT-H6-I for example. The operation principle, soft-switching conditions, duty cycle restriction, and parameter design rule of the resonant tank are analyzed in detail. Finally, the validity of the ZVT concept is verified by a ZVT-H6-I prototype rated at 100 kHz and 1 kW.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	5393
Ending Page	5401
Page Count	9
File Size	1452358
File Format	PDF
ISSN	02780046
Volume Number	61
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Topology Inverters Switching frequency Resonant frequency Switches Bridge circuits Inductors Resonant tank Grid-connected inverter Transformerless Zero-voltage-transition zero-voltage transition (ZVT) resonant tank transformerless
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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