Load-adaptive zero-phase-shift direct repetitive control for stand-alone four-leg VSI

Lidozzi, Alessandro; Solero, Luca; Crescimbini, Fabio; Ji, Chao; Zanchetta, Pericle

Abstract

This paper deals with a dedicated load adaptive phase compensation algorithm to be used in Repetitive Control based stand-alone 4-leg VSI. The plant model is achieved, its inherent modifications according to the operating point are highlighted and used to properly adapt the Repetitive Control structure. Modification of the repetitive control parameters is described to obtain the desired phase compensation capabilities achieving a Zero-Phase-Shift condition at each harmonic. This allows to increase the gain of the Repetitive Controller at high order harmonics thus yielding a better VSI output voltages with strongly reduced THD and faster dynamic response. As a consequence, the VSI output voltages are almost independent from the loads to be fed and the 4-leg VSI with the proposed Zero-Phase-Shift Direct Repetitive Control is an ideal candidate to supply sensitive loads in microgrid, in particular for stand-alone applications.

Citation

Lidozzi, A., Solero, L., Crescimbini, F., Ji, C., & Zanchetta, P. (2016). Load-adaptive zero-phase-shift direct repetitive control for stand-alone four-leg VSI. IEEE Transactions on Industry Applications, 52(6), 4899-4908. https://doi.org/10.1109/TIA.2016.2595493

• Journal Article Type: Article
• Acceptance Date: Jul 21, 2016
• Publication Date: Jul 28, 2016
• Deposit Date: Jan 23, 2017
• Publicly Available Date: Jan 23, 2017
• Journal: IEEE Transactions on Industry Applications
• Print ISSN: 0093-9994
• Electronic ISSN: 1939-9367
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 52
• Issue: 6
• Pages: 4899-4908
• DOI: https://doi.org/10.1109/TIA.2016.2595493
• Keywords: Unbalanced loads, DC-AC power converters, Distributed power generation, Harmonic distortion, Repetitive control stability
• Public URL: https://nottingham-repository.worktribe.com/output/798667
• Publisher URL: http://ieeexplore.ieee.org/document/7524676/
• Additional Information: (c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.