Frequency Excursion of Three Area H-T-H Deregulated System Optimized by BF Algorithm with Energy Storage Devices

Abstract

: This paper adresses the results of an analysis of the dynamic performance of tie line power and frequency control, for an Automatic Generation Control (AGC) in three-area power system after deregulation, based on Bacterial Foraging (BF) optimization technique with the presence of energy storage devices. A comparative transient performance of AGC Control with SMES and CES are analyzed in deregulated environment. A maiden attempt has been made by implementing AGC with SMES, CES in deregulated environment with BF based optimal tuning of three area interconnected power system. The proposed method optimizes the parameter of integral controller by selecting the optimal gain which drives the change in frequency in the two areas and tie line power flow to zero within the shortest time span. The conventional three areas AGC system is modified to take into account the effect of bilateral contracts on the dynamics. In the considered power system, each area contains three GENCOs, three DISCOs and three area includes H-T-H systems generating units. After deregulation, to describe bilateral contract for three area AGC, DISCO participation matrix is used. The performance of the system is studied for different operating cases. Simulation results revealed that the proposed controller damped out the frequency of oscillations and restore the system frequency and tie line power to set the value after the step load disturbance.