Frequency adaptive fractional order repetitive control of shunt active power filters

Zou, Z.-X., Zhou, K. , Wang, Z. and Cheng, M. (2015) Frequency adaptive fractional order repetitive control of shunt active power filters. IEEE Transactions on Industrial Electronics, 62(3), pp. 1659-1668. (doi:10.1109/TIE.2014.2363442)

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Abstract

Repetitive control which can achieve zero steady-state error tracking of any periodic signal with known integer period, offers active power filters a promising accurate current control scheme to compensate the harmonic distortion caused by nonlinear loads. However, classical repetitive control cannot exactly compensate periodic signals of variable frequency, and would lead to significant performance degradation of active power filters. In this paper a fractional order repetitive control strategy at fixed sampling rate is proposed to deal with any periodic signal of variable frequency, where a Lagrange interpolation based fractional delay filter is used to approximate the factional delay items. The synthesis and analysis of fractional-order repetitive control systems are also presented. The proposed fractional-order repetitive control offers fast on-line tuning of the fractional delay and the fast update of the coefficients, and then provides active power filters with a simple but very accurate real-time frequency adaptive control solution to the elimination of harmonic distortions under grid frequency variations. A case study of single-phase shunt active power filter is conducted. Experimental results are provided to demonstrate the validity of the proposed fractional-order repetitive control.

Item Type:Articles
Keywords:repetitive control, active power filter, varying frequency
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Zhou, Dr Keliang
Authors: Zou, Z.-X., Zhou, K., Wang, Z., and Cheng, M.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Transactions on Industrial Electronics
Publisher:Institute of Electrical and Electronics Engineers
ISSN:0278-0046
ISSN (Online):1557-9948

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