Fault tolerant three-level boost inverter with reduced source and LC count

Sahoo, Manoranjan and K, Siva Kumar (2017) Fault tolerant three-level boost inverter with reduced source and LC count. IET Power Electronics, 11 (2). pp. 339-405. ISSN 1755-4535

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Presently single stage boost multilevel inverters are becoming more popular for power conversion in renewable energy systems, AC-DC hybrid microgrids etc. Usually in these boost inverter the voltage stress across the inverter leg switches as well as current through these switches are quite higher as compared to load ratings which increases the chances of inverter leg switch failure. In this paper a three level voltage source boost inverter is proposed to achieve rated three level AC output voltage in a single power conversion stage. It retains all the advantages of three level quasi Z- Source inverter by using less number of passive components in the intermediate network between DC source and inverter leg. Beside the inherent shoot through fault tolerant feature the proposed inverter is capable to operate in open circuit failure to give rated balanced AC voltage at load. The above advantages of the proposed single stage inverter make it suitable for low and medium power renewable energy applications where size, weight are main constraint and some of the critical loads are connected to the system. The proposed inverter is verified by simulation (in MATLAB Simulink) and experiment with the help of a laboratory prototype.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Article
Uncontrolled Keywords: invertors; AC-DC power convertors; DC-DC power convertors; distributed power generation; power semiconductor switches; failure analysis; fault tolerance; voltage-source convertors; fault tolerant three-level boost inverter; reduced source; LC count; single stage boost multilevel inverters; single power conversion stage; renewable energy systems; AC-DC hybrid microgrids; impedance network; h-bridge inverter; DC-DC converter; voltage stress; inverter leg switch failure; three-level voltage source boost inverter; rated three-level AC output voltage; passive components; open circuit failure; rated balanced AC voltage; single stage inverter; low-power renewable energy applications; medium-power renewable energy applications; MATLAB Simulink
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 16 Feb 2018 06:44
Last Modified: 16 Feb 2018 06:44
URI: http://raiith.iith.ac.in/id/eprint/3787
Publisher URL: http://doi.org/10.1049/iet-pel.2017.0085
OA policy: http://www.sherpa.ac.uk/romeo/issn/1755-4535/
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