Fractional-Order Time Delay Compensation in Deadbeat Control for Power Converters

Wang, Z., Zhou, K. , Li, S. and Yang, Y. (2018) Fractional-Order Time Delay Compensation in Deadbeat Control for Power Converters. In: 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC), Shenzhen, China, 04-07 Nov 2018, ISBN 9781538660546 (doi:10.1109/PEAC.2018.8590593)

Wang, Z., Zhou, K. , Li, S. and Yang, Y. (2018) Fractional-Order Time Delay Compensation in Deadbeat Control for Power Converters. In: 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC), Shenzhen, China, 04-07 Nov 2018, ISBN 9781538660546 (doi:10.1109/PEAC.2018.8590593)

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Abstract

Deadbeat control scheme is widely implemented in the control of power electronics and electrical drives, which is of simplification, rapidity and flexibility. However, owing to its sensitive to model uncertainties and unmodeled dynamics, the practical control performance is severely degraded and sometimes even unstable. Uncertain time delay is a typical case of model uncertainties, which severely deteriorates the control accuracy and dramatically reduce the system stability margin of deadbeat control. In this paper, the time delay effects on the control performance and system stability are investigated. A fractional-order Smith Predictor based solution is proposed to compensate arbitrary time delay with high accuracy, simple structure, and good robustness. The composite control scheme offers accurate time delay compensations in digital implementation and considerably enhances the robustness of the control system, which will effectively promote widespread applications of the deadbeat scheme. An application example of three-phase inverter system is explored to comprehensively illustrate the feasibility and effectiveness of the proposed scheme.

Item Type:Conference Proceedings
Additional Information:This work was partially supported by National Natural Science Foundation of China under Grants (61673305), and Scientific Research Foundation of Graduate School of Southeast University (YBJJ1766).
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zhou, Dr Keliang
Authors: Wang, Z., Zhou, K., Li, S., and Yang, Y.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
ISBN:9781538660546
Published Online:27 December 2018
Copyright Holders:Copyright © 2018 IEEE
First Published:First published in 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC)
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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