Modulation and control of three-phase paralleled Z-source inverters for distributed generation applications

Vilathgamuwa, D. Mahinda, Gajanayake, Chandana Jayampathi, & Loh, Poh Chiang (2009) Modulation and control of three-phase paralleled Z-source inverters for distributed generation applications. IEEE Transactions on Energy Conversion, 24(1), pp. 173-183.

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This paper presents a modulation and controller design method for paralleled Z-source inverter systems applicable for alternative energy sources like solar cells, fuel cells, or variablespeed wind turbines with front-end diode rectifiers. A modulation scheme is designed based on simple shoot-through principle with interleaved carriers to give enhanced ripple reduction in the system. Subsequently, a control method is proposed to equalize the amount of power injected by the inverters in the grid-connected mode and also to provide reliable supply to sensitive loads onsite in the islanding mode. The modulation and controlling methods are proposed to have modular independence so that redundancy, maintainability, and improved reliability of supply can be achieved. The performance of the proposed paralleled Z-source inverter configuration is validated with simulations carried out using Matlab/Simulink/Powersim. Moreover, a prototype is built in the laboratory to obtain the experimental verifications.

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37 citations in Scopus
32 citations in Web of Science®
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ID Code: 74232
Item Type: Journal Article
Refereed: Yes
Keywords: Distributed generation (DG), Parallel inverters, Z-source inverter
DOI: 10.1109/TEC.2008.2002314
ISSN: 0885-8969
Copyright Owner: Copyright 2009 IEEE
Deposited On: 22 Jul 2014 22:20
Last Modified: 22 Jun 2017 02:01

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