AUTOMATIC GENERATION CONTROL OF MULTI AREA INTERCONNECTED THERMAL POWER SYSTEM CONSIDERING ASYNCHRONOUS TIE-LINES

Abstract

This paper investigates the effects of HVDC tie-line in parallel with HVAC tie-line on automatic generation control (AGC) problem for a multi-area power system taking into consideration system parameter variations. A fuzzy logic controller is used for five area power system interconnected via parallel HVAC/HVDC transmission link which is also referred as asynchronous tie-lines. The linear model of HVAC/HVDC link is developed and the system responses to sudden load change are studied. Suitable solution for automatic generation control problem of five area electrical power system is obtained by means of improving dynamic performance of power system under study. Robustness of controller is also checked by varying parameters. Simulation results indicate that the scheme works well. The dynamic analyses have been done with and without HVDC link using fuzzy logic controller in MATLAB/SIMULINK. Further a comparison between the two is presented and it has been shown that the performance of the scheme under study is superior in terms of overshoot and settling time.