Journal of Applied Science and Engineering

Published by Tamkang University Press

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S. Ramesh This email address is being protected from spambots. You need JavaScript enabled to view it.1 and A. Krishnan2

1Department of EEE, K.S.R. College of Engineering, Tiruchengode (TN), India
2Dean, K.S.R. College of Engineering, Tiruchengode (TN), India


 

Received: November 22, 2010
Accepted: March 25, 2011
Publication Date: December 1, 2011

Download Citation: ||https://doi.org/10.6180/jase.2011.14.4.07  


ABSTRACT


This paper presents a Supervisory Expert Fuzzy Controller (SEFC) for maintaining the system frequency in a parallel AC-DC interconnected thermal power system. In the proposed control scheme, the input scaling factor tuning of a direct expert controller is made using the area control error and power plant system input to obtain better performance for a different load disturbance. The control scheme will reduce the Area Control Error (ACE) and increase the system dynamic stability. The control scheme consists of a lower level direct fuzzy controller and an upper level supervisory fuzzy controller. The lower level controller provides the solution to a particular situation and the upper level controller provides a mechanism to the main goal of the system. The responses to various load changes in the multi area system are studied and the performance of the proposed expert controller is compared with the conventional integral controller and the fuzzy controller. The results prove that the SEFC performance is better in terms of stability and robustness than conventional control methods.


Keywords: Load Frequency Control, AC-DC Interconnected System, High Voltage Direct Current (HVDC) Link, Area Control Error, Direct Fuzzy Controller, Supervisory Expert Fuzzy Controller


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