Damping improvement of multiple damping controllers by using optimal coordinated design based on PSS and FACTS-POD in a multi-machine power system

Abstract EN

The aim of this study is to present a comprehensive comparison and assessment of the damping function improvement of power system oscillation for the multiple damping controllers using the simultaneously coordinated design based on Power System Stabilizer (PSS) and Flexible AC Transmission System (FACTS) devices.

FACTS devices can help in the enhancing the stability of the power system by adding supplementary damping controller to the control channel of the FACTS input to implement the task of Power Oscillation Damping (FACT POD) controller.

Simultaneous coordination can be performed in different ways.

First, the dual coordinated designs between PSS and FACTS POD controller or between different FACTS POD controllers are arranged in a multiple FACTS devices without PSS.

Second, the simultaneous coordination has been extended to triple coordinated design among PSS and different FACTS POD controllers.

The parameters of the damping controllers have been tuned in the individual controllers and coordinated designs by using a Chaotic Particle Swarm Optimization (CPSO) algorithm that optimized the given eigenvalue-based objective function.

The simulation results for a multi-machine power system show that the dual coordinated design provide satisfactory damping performance over the individual control responses.

Furthermore, the triple coordinated design has been shown to be more effective in damping oscillations than the dual damping controllers.