NDLI: Single-phase isolated impedance-source inverters

Content Provider	IEEE Xplore Digital Library
Author	Aleem, Z. Ahmed, H.F. Honnyong Cha Heung-Guen Kim
Copyright Year	2015
Description	Author affiliation: Sch. of Energy Eng., Kyungpook Nat. Univ., Daegu, South Korea (Aleem, Z.; Ahmed, H.F.; Honnyong Cha) \|\| Dept. of Electr. Eng., Kyungpook Nat. Univ., Daegu, South Korea (Heung-Guen Kim)
Abstract	This paper presents a new class of impedance source inverters which offers high frequency isolation between the inverter bridge and the load. Conventional Z-source inverter which employs a impedance network consisting of inductors and capacitors have unique features which can be realized as both buck and boost functions without the need of dead time and overlap time, that cannot be achieved by traditional voltage-fed and current-fed inverters. This paper extends this novel concept by using electrical isolation in impedance source inverters. High frequency isolation itself have limitless advantages in terms of safety, reliability etc. when applied with impedance source inverter makes it a preferable choice for industrial applications. In PV systems a dc circulating current emerges and flows into grid which damages the whole system, electrical isolation prevents the injection of this dc current into the grid. Moreover the gain of the proposed inverter can also be adjusted by varying the turns ratio of the high frequency transformer giving more freedom in utilizing a higher modulation index, results in increased efficiency in terms of waveform quality, improved power factor, lower component voltage stress etc. An experimental prototype is constructed to validate the working operation of the proposed inverter.
Starting Page	129
Ending Page	134
File Size	393537
Page Count	6
File Format	PDF
ISBN	9788957082546
ISSN	21506086
DOI	10.1109/ICPE.2015.7167776
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-06-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Korean Institute of Power Electronics
Subject Keyword	impedance-source inverter Capacitors Modulation Bridge circuits DC-AC power conversion buck-boost capability Inverters Virtual private networks Impedance Stress electrical isolation
Content Type	Text
Resource Type	Article

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