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K. Hari Krishna
Dr. K. Chandra Sekhar

Abstract

This paper presents a suitable mathematical model of Thermal-Hydro-Gas (T-H-G) Automatic Generation Control (AGC) system under deregulated environment. The variable power consumption as well as intermittent load variation may cause large fluctuations on system frequency. To reduce the system oscillations Thyristor Controlled Series Compensation (TCSC), HVDC and AC tie line and Superconducting Magnetic Energy Storage (SMES) can be applied. The system transfer function model comprises thermal, hydro and gas power generations with governor models and system load for studying the dynamic response for small load perturbations along with the model of TCSC, HVDC and AC tie line and SMES are presented. Integral controllers have been considered in both the areas whose optimal values are obtained by minimizing the Integral Squared Error (ISE) technique. The particle swarm optimization (PSO) is applied to solve the control problem to achieve the controller parameters and also to optimize the Integral Controllers of two area power system in deregulated environment. An attempt is made in this paper to validate conventionally designed controller parameters to AGC in deregulated power systems to simplify the controller design. The dynamic responses with conventional and deregulated controller parameters are compared. Simulation studies reveal that with the application of the conventionally designed control parameters to the deregulated power systems is valid and gives even better response i

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