Abstract:
This paper investigates the effects of HVDC link in parallel with HVAC link
on automatic generation control (AGC) problem for a multi area power
system taking into consideration system parameter variations. A fuzzy logic
controller is proposed for four 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. The simulation studies are
carried out for a four area interconnected thermal power system. Suitable
solution for automatic generation control problem of four area electrical
power system is obtained by means of improving the 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 proposed
scheme is superior in terms of overshoot and settling time