Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/81192
Title: Versatile UPQC Control System with a Modified Repetitive Controller under Nonlinear and Unbalanced Loads
Authors: Trinh, Quoc-Nam
Lee, Hong-Hee
Keywords: Active power filter
Harmonic compensation
Repetitive control
Unified power quality conditioner
Issue Date: 2015
Source: Trinh, Q.-N., & Lee, H.-H. (2015). Versatile UPQC Control System with a Modified Repetitive Controller under Nonlinear and Unbalanced Loads. Journal of Power Electronics, 15(4), 1093-1104.
Series/Report no.: Journal of Power Electronics
Abstract: A standard repetitive controller (RC) is theoretically able to replace a bank of resonant controllers in harmonic signals tracking applications. However, the traditional RC has some drawbacks such as a poor dynamic response and a complex structure to compensate grid frequency deviations for an effective unified power quality conditioner (UPQC) control scheme. In order to solve these problems, an improved RC with an outstanding dynamic response and a simplified grid frequency adaptive scheme is proposed for UPQC control systems in this paper. The control strategy developed for the UPQC has delay time, i.e., one-sixth of a fundamental period (Tp/6), repetitive controllers. As a result, the UPQC system can provide a fast dynamic response along with good compensation performance under both nonlinear and unbalanced loads. Furthermore, to guarantee the excellent performance of the UPQC under grid frequency deviations, a grid frequency adaptive scheme was developed for the RC using a simple first order Padé's approximation. When compared with other approaches, the proposed control method is simpler in structure and requires little computing time. Moreover, the entire control strategy can be easily implemented with a low-cost DSP. The effectiveness of the proposed control method is verified through various experimental tests.
URI: https://hdl.handle.net/10356/81192
http://hdl.handle.net/10220/39188
ISSN: 1598-2092
DOI: 10.6113/JPE.2015.15.4.1093
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2015 Korean Institute of Power Electronics. This paper was published in Journal of Power Electronics and is made available as an electronic reprint (preprint) with permission of Korean Institute of Power Electronics. The published version is available at: [http://dx.doi.org/10.6113/JPE.2015.15.4.1093]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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