Unified Digital Periodic Signal Filters for Power Converter Systems

Yang, Y., Xin, Z., Zhou, K. and Blaabjerg, F. (2017) Unified Digital Periodic Signal Filters for Power Converter Systems. In: 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia), Kaohsiung, Taiwan, 03-07 Jun 2017, pp. 286-291. ISBN 9781509051571 (doi:10.1109/IFEEC.2017.7992052)

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Abstract

Periodic signal controllers like repetitive and resonant controllers have demonstrated much potential in the control of power electronic converters, where periodic signals (e.g., ac voltages and currents) can be precisely regulated to follow references. Beyond the control of periodic signals, ac signal processing (e.g., in synchronization and pre-filtering) is also very important for power converter systems. Hence, this paper serves to unify digital periodic signal filters so as to maximize their roles in power converter systems (e.g., enhance the control of ac signals). The unified digital periodic signal filters behave like a comb filter, but it can also be configured to selectively filter out the harmonics of interest (e.g., the odd-order harmonics in single-phase power converter systems). Moreover, a virtual variable-sampling-frequency unit delay that enables frequency adaptive periodic signal filters is introduced, which can enhance the filtering performance even under non-nominal conditions. Case studies on a digital synchronization system and also a single-phase photovoltaic system have demonstrated the effectiveness of the unified digital periodic signal filters.

Item Type:Conference Proceedings
Additional Information:This work was supported in part by the European Commission within the European Unions Seventh Framework Program (FP7/2007-2013) through the SOLAR-ERA.NET Transnational Project (PV2GRID), by Energinet.dk (ForskEL, Denmark, Project No. 2015-1-12359), and in part by the Research Promotion Foundation (RPF, Cyprus, Project No. KOINA/SOLARERA.NET/0114/02). This work was also in part supported by the European Research Council (ERC) under the European Unions Seventh Framework Program (FP/20072013)/ERC Grant Agreement 321149-Harmony.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zhou, Dr Keliang
Authors: Yang, Y., Xin, Z., Zhou, K., and Blaabjerg, F.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
ISBN:9781509051571
Published Online:27 July 2017
Copyright Holders:Copyright © 2017 IEEE
First Published:First published in the 2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia): 286-291
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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