Zou, Z., Zhou, K. , Wang, Z. and Cheng, M. (2014) Fractional-order repetitive control of programmable AC power sources. IET Power Electronics, 7(2), pp. 431-438. (doi: 10.1049/iet-pel.2013.0429)
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Abstract
Programmable AC power sources that provide variable-frequency and variable-amplitude output voltages are widely used in automatic testing equipment and bench top applications. Under various load conditions, a high-performance programmable AC power source not only can generate very clean sinusoidal output voltages, but also to accurately synthesise specified harmonic distorted wave-shapes. Digital repetitive control (RC) can achieve zero steady-state error tracking of any periodic signal with known integer period, but usually fails to provide precise tracking of variable-frequency periodical waveform with fractional period. In this study, a frequency adaptive fractional-order RC (FORC) strategy at fixed sampling rate is proposed to track or eliminate any periodic signals with variable frequency, where a Lagrange interpolation-based fractional delay filter is used to approximate the factional delay items in RC. The proposed FORC that offers fast on-line tuning of the fractional delay and the fast update of the coefficients, provide a simple but high-performance real-time control approach to dealing with variable-frequency variable-magnitude periodic signals. A case study of FORC-based programmable AC power source is conducted. Experimental results are provided to show the effectiveness of the proposed FORC strategy. It can be widely used in extensive applications.
Item Type: | Articles |
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Keywords: | Fractional order, repetitive control, power converter |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Zhou, Dr Keliang |
Authors: | Zou, Z., 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 |
Journal Name: | IET Power Electronics |
Publisher: | Institution of Engineering and Technology |
ISSN: | 1755-4535 |
ISSN (Online): | 1755-4543 |
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