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A Proportional plus Multiresonant Controller for Three-Phase Four-Wire High-Frequency Link Inverter

De, Dipankar and Ramanarayanan, Venkataramanan (2010) A Proportional plus Multiresonant Controller for Three-Phase Four-Wire High-Frequency Link Inverter. In: IEEE Transactions on Power Electronics, 25 (4). pp. 899-906.

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Abstract

A new solution for unbalanced and nonlinear loads in terms of power circuit topology and controller structure is proposed in this paper. A three-phase four-wire high-frequency ac-link inverter is adopted to cater to such loads. Use of high-frequency transformer results in compact and light-weight systems. The fourth wire is taken out from the midpoint of the isolation transformer in order to avoid the necessity of an extra leg. This makes the converter suitable for unbalanced loads and eliminates the requirements of bulky capacitor in half-bridge inverter. The closed-loop control is carried out in stationary reference frame using proportional + multiresonant controller (three separate resonant controller for fundamental, fifth and seventh harmonic components). The limitations on improving steady-state response of harmonic resonance controllers is investigated and mitigated using a lead-lag compensator. The proposed voltage controller is used along with an inner current loop to ensure excellent performance of the power converter. Simulation studies and experimental results with 1 kVA prototype under nonlinear and unbalanced loading conditions validate the proposed scheme.

Item Type: Journal Article
Additional Information: Copyright 2010 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Digital controller; four-wire systems; high-frequency link; nonlinear loads; resonant controller
Department/Centre: Division of Electrical Sciences > Electrical Engineering
Date Deposited: 26 Apr 2010 08:31
Last Modified: 19 Sep 2010 06:00
URI: http://eprints.iisc.ernet.in/id/eprint/27258

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