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Unified Smith predictor and H∞ loop shaping for load frequency control with delay

Unified Smith predictor and H∞ loop shaping for load frequency control with delay A fixed-structure controller based on robust H loop shaping for load frequency control (LFC) of two area system having communication delay is designed in this paper. The delay complicates the design and implementation of the controller. Unified Smith Predictor (USP) has been analysed to convert delayed plant to a delay free augmented plant. A robust controller is designed for the augmented plant by formulating an optimisation problem using H loop shaping performance condition and is solved by using genetic algorithm (GA). It is shown that designed controller has simpler structure than conventional H loop shaping controller and ensures stable dynamic performance. Keywords: communication delay; unified Smith predictor; USP; H loop shaping; genetic algorithm; load frequency control; LFC. Reference to this paper should be made as follows: Ahuja, A., Narayan, S. and Kumar, J. (2016) `', Int. J. Systems, Control and Communications, Vol. 7, No. 3, pp.240­254. Biographical notes: Ashu Ahuja has received her BTech in Electrical Engineering from National Institute of Technology, Kurukshetra, Haryana, India in 2001 and MTech in Instrumentation and Control National Institute of Technical Teachers' Training and Research, Chandigarh, India in 2008. She is pursuing her PhD from PEC University of Technology, Chandigarh, India. Currently, http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Systems, Control and Communications Inderscience Publishers

Unified Smith predictor and H∞ loop shaping for load frequency control with delay

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Publisher
Inderscience Publishers
Copyright
Copyright © 2016 Inderscience Enterprises Ltd.
ISSN
1755-9340
eISSN
1755-9359
DOI
10.1504/IJSCC.2016.077407
Publisher site
See Article on Publisher Site

Abstract

A fixed-structure controller based on robust H loop shaping for load frequency control (LFC) of two area system having communication delay is designed in this paper. The delay complicates the design and implementation of the controller. Unified Smith Predictor (USP) has been analysed to convert delayed plant to a delay free augmented plant. A robust controller is designed for the augmented plant by formulating an optimisation problem using H loop shaping performance condition and is solved by using genetic algorithm (GA). It is shown that designed controller has simpler structure than conventional H loop shaping controller and ensures stable dynamic performance. Keywords: communication delay; unified Smith predictor; USP; H loop shaping; genetic algorithm; load frequency control; LFC. Reference to this paper should be made as follows: Ahuja, A., Narayan, S. and Kumar, J. (2016) `', Int. J. Systems, Control and Communications, Vol. 7, No. 3, pp.240­254. Biographical notes: Ashu Ahuja has received her BTech in Electrical Engineering from National Institute of Technology, Kurukshetra, Haryana, India in 2001 and MTech in Instrumentation and Control National Institute of Technical Teachers' Training and Research, Chandigarh, India in 2008. She is pursuing her PhD from PEC University of Technology, Chandigarh, India. Currently,

Journal

International Journal of Systems, Control and Communications – Inderscience Publishers

Published: Jan 1, 2016

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