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 v
ariations. A fuzzy logic
controller is proposed for four area power system i
nterconnected via parallel
HVAC/HVDC transmission link which is also referred as
asynchronous tie-
lines. The linear model of HVAC/HVDC link is develope
d and the system
responses to sudden load change are studied. The si
mulation studies are
carried out for a four area interconnected thermal
power system. Suitable
solution for automatic generation control problem o
f four area electrical
power system is obtained by means of improving the
dynamic performance
of power system under study. Robustness of controll
er is also checked by
varying parameters. Simulation results indicate tha
t the scheme works well.
The dynamic analyses have been done with and withou
t HVDC link using
fuzzy logic controller in Matlab-Simulink. Further
a comparison between the
two is presented and it has been shown that the per
formance of the proposed
scheme is superior in terms of overshoot and settli
ng time