Application of Kharitonov's Theorem and its Results to Load Frequency Control

Bevrani, Hassan (1998) Application of Kharitonov's Theorem and its Results to Load Frequency Control. Iranian Journal of Electrical Science and Technology (BARGH), pp. 82-95.


The classical design of load-frequency controller is usually based on the conventionally tuned PI controllers. These controllers are designed for a particular operating point of the system. Closed-loop system stability and acceptable performance is only achieved for slight deviations from the nominal operating point of the power system. In the present paper, to overcome the problem of parameter variations and to maintain the simplicity of controller, a new robust power system load-frequency controller is proposed. The Kharitonov’s theorem and its results are utilized to design robust controller to achieve robust stability and performance. Then, robust stability analysis is carried out graphically by employing the notions of "Value set" and "Zero exclusion". Simulation results are given to show the robust stability and performance of the designed controller over a wide range of system uncertainties and load disturbances.

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ID Code: 15122
Item Type: Journal Article
Refereed: Yes
Additional Information: For more information, please contact the author.
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 1998 Iranian Journal of Electrical Science and Technology
Deposited On: 13 Oct 2008 00:00
Last Modified: 15 Jan 2009 08:34

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