NDLI: Design and Comparison of High Performance Stationary-Frame Controllers for DVR Implementation

Content Provider	IEEE Xplore Digital Library
Author	Yun Wei Li Blaabjerg, F. Vilathgamuwa, D.M. Poh Chiang Loh
Copyright Year	1986
Abstract	The performance of a dynamic voltage restorer (DVR) is determined solely by its controller. The design of high performance control algorithms for DVR control with improved robustness and desirable steady-state and transient characteristics is therefore an important area of study. In this paper, two voltage controllers are proposed in the stationary frame for DVR voltage regulation. A P+resonant controller is first designed to achieve good positive- and negative-sequence fundamental voltage control with the virtue of having high gains around plusmn50Hz. Stationary-to-synchronous frame transformations carried out in traditional synchronous proportional-integral regulators are no longer required with this method. However, with the purpose of achieving explicit robustness in face of parameter variations, an Hinfin controller is also designed. Detailed design procedure is presented to show how an Hinfin controller with high gains around plusmn50Hz can be synthesized through careful selection of its weighting functions. A thorough discussion and performance comparison of these two controllers in both transient and steady-state conditions are also carried out. Finally, both controllers are extensively tested on a laboratory 10-kV medium voltage level DVR system with various voltage sags and loading conditions
Sponsorship	IEEE Power Electronics Society
Starting Page	602
Ending Page	612
Page Count	11
File Size	3689710
File Format	PDF
ISSN	08858993
Volume Number	22
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Robust control Steady-state Algorithm design and analysis Regulators Control system synthesis Control systems System testing Laboratories Medium voltage unbalanced voltage sag Dynamic voltage restorer (DVR) ${H}\infty$ control nonlinear load resonant controller stationary-frame controller
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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