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Open AccessArticle

Application of Linear Quadratic Gaussian and Coefficient Diagram Techniques to Distributed Load Frequency Control of Power Systems

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Department of Electrical Engineering, Faculty of Energy Engineering, Aswan University, Sahary, 81528 Aswan, Egypt
2
Department of Electrical Engineering, Faculty of Engineering, Minia University, Main road, 61111 Minia, Egypt
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Minho Shin and Antonio Fernández-Caballero
Appl. Sci. 2015, 5(4), 1603-1615; https://doi.org/10.3390/app5041603
Received: 11 September 2015 / Revised: 11 November 2015 / Accepted: 30 November 2015 / Published: 4 December 2015
This paper presented both the linear quadratic Gaussian technique (LQG) and the coefficient diagram method (CDM) as load frequency controllers in a multi-area power system to deal with the problem of variations in system parameters and load demand change. The full states of the system including the area frequency deviation have been estimated using the Kalman filter technique. The efficiency of the proposed control method has been checked using a digital simulation. Simulation results indicated that, with the proposed CDM + LQG technique, the system is robust in the face of parameter uncertainties and load disturbances. A comparison between the proposed technique and other schemes is carried out, confirming the superiority of the proposed CDM + LQG technique. View Full-Text
Keywords: load frequency control (LFC); coefficient diagram method (CDM); linear quadratic Gaussian (LQG); integral control (I); kalman filter load frequency control (LFC); coefficient diagram method (CDM); linear quadratic Gaussian (LQG); integral control (I); kalman filter
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Mohamed, T.H.; Diab, A.A.Z.; Hussein, M.M. Application of Linear Quadratic Gaussian and Coefficient Diagram Techniques to Distributed Load Frequency Control of Power Systems. Appl. Sci. 2015, 5, 1603-1615.

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