Automatic Generation Control of Two-area
Interconnected Hydro-Hydro Restructured Power
System with TCPS and SMES
International Journal on Control System and Instrumentation, 2 (2):
5 (June 2011)Abstract
Non-minimum phase characteristic of hydro turbine
shows an opposite initial power surge in the event of frequency
disturbance, thus possesses widely different characteristic than
thermal generating unit. This paper presents Automatic
Generation Control (AGC) of an interconnected two-area
multiple-units hydro-hydro power system in restructured
electricity market. The step load perturbation to such a system
results in heavy frequency oscillations and the system is
unable to regain its stable state as the positive real parts of
some eigenvalue pairs confirm the inherent dynamically
unstable characteristic of the system. To stabilize the
frequency oscillations, impacts of Superconducting Magnetic
Energy Storage (SMES) placed at terminal of area and
Thyristor Controlled Phase Shifter (TCPS) located in series
with tie-line have been investigated. Two cases such as (a)
SMES-SMES coordination and (b) TCPS-SMES coordination
are evaluated to compare their effectiveness to suppress the
frequency oscillations. The parameters of TCPS, SMES and
integral gains of AGC loop are optimized through crazinessbased
particle swarm optimization algorithm in order to have
the optimal transient response of the system under different
PoolCo and bilateral transaction in restructured electricity
market.