A Hybrid Genetic-Simulated Annealing Approach to TCPS based Hydrothermal System under Open Market System

 C. Srinivasa Rao¹,  S. Siva Nagaraju², P. Sangameswara Raju³

Abstract

This paper presents the analysis of Automatic generation control (AGC) of a two-area interconnected hydrothermal system with Thyristor controlled phase shifter (TCPS) in series with the tie-line under open market system. It also involves the optimization of integral controller employing a hybrid approach of modified Genetic algorithm and Simulated Annealing method (HMGASA) modified genetic algorithm method. Open transmission access and the evolving of more socialized companies for generation, transmission and distribution affects the formulation of AGC problem. So the traditional AGC two-area system is modified to take into account the effect of bilateral contracts on the dynamics. It is possible to stabilize the system frequency and tie-power oscillations by controlling the phase angle of TCPS which is expected to provide a new ancillary service for the future power systems. A control strategy using TCPS is proposed to provide active control of system frequency. Gain settings of the integral controllers without and with TCPS are optimized using the HMGASA technique following a step load disturbance in either of the areas. Analysis reveals that a TCPS is quite capable of suppressing the frequency and tie-power oscillations effectively as compared to that obtained without TCPS

Key Words:
 

 Keywords: AGC, Hydrothermal, TCPS, HMGASA algorithm, Disco participation matrix, open market system

(P1110714002, 586 KB) 

Biographies:

	C.Srinivasa Rao graduated from J.N.T University in 2002, Masters in 2004 from Birla Institute of Technology, Mesra and currently pursuing his Ph.D from J.N.T.University. Working as Assistant Professor in the Department of Electrical Engineering, G.Pulla Reddy Engineering college (Autonomous), Kurnool, Andhra Pradesh since June 2004. His areas of interest are in Genetic Algorithm applications, power system operation and control and Deregulated market
	Dr.S.Sivanagaraju, graduated in 1998, Masters in 2000 from IIT, Kharagpur and did his Ph.D from J.N.T.University in 2004. Presently he is working as Associate Professor in the Department of Electrical Engineering, J.N.T.U College of Engg. (Autonomous), Kakinada.  He is Referee for IEE Proceedings- Generation Transmission and Distribution and International Journal of Emerging Electric Power System. He has about 40 publications in National and International Journals and Conferences to his credit.  His areas of interest are in Distribution Automation, Genetic Algorithm applications to distribution systems and power system.
	Dr.P.Sangameswararaju did his Ph.D from S.V.University.  Presently he is working as Associate Professor in the Department of Electrical Engineering, S.V.University. Tirupathi, Andhra Pradesh. He has about 20 publications in National and International Journals and Conferences to his credit. His areas of interest are in Distribution systems and power systems.

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