Coordinated design of PSS and multiple FACTS devices based on the PSO-GA
algorithm to improve the stability of wind-PV-thermal-bundled power
system.
Abstract
The application of new energy sources has a significant impact on the
stability of power systems. In order to realize the coordinated design
of multiple Flexible AC Transmission Systems (FACTS) devices in the
wind-PV-thermal-bundled (WPTB) power transmission system to suppress the
low-frequency oscillation (LFO) of the system. In this paper, the Static
Synchronous Compensator (STATCOM) and the Static Synchronous Series
Compensator (SSSC) with additional power oscillation damping controller
(PODC) are designed based on the tie-line transmission power signal to
enhance the improvement effect of FACTS devices on system stability. The
objective function is constructed by considering the transient voltage
stability of the WPTB power transmission system, the real part of the
eigenvalues and damping level of the LFO modes. And the coordinated and
optimized design of Power System Stabilizer (PSS), SSSC-POD and
STATCOM-POD is performed by the hybrid particle swarm optimization
algorithm and genetic algorithm (PSO-GA) and pattern analysis theory of
LFO. Finally, the effectiveness of the designed parameter optimization
method is verified by simulation under various operating conditions,
including new energy unit output change and tie-line transmission power
change.