PSSs and SVC Damping Controllers Design to Mitigate Low Frequency Oscillations Problem in a Multi-machine Power System

Abstract

-This paper deals with the design of multi-machine power system stabilizers (PSSs) and Static var compensator (SVC) using Modified shuffled frog leaping algorithm (MSFLA). The effectiveness of the proposed scheme for optimal setting of the PSSs and SVC controllers has been attended. The PSSs and SVC controllers designing is converted to an optimization problem in which the speed deviations between generators are involved. In order to compare the capability of PSS and SVC, they are designed independently once, and in a coordinated mode once again. The proposed method is applied on a multi-machine power system under different operating conditions and disturbances to confirm the effectiveness of it. The results of tuned PSS controller based on MSFLA (MSFLAPSS) and tuned SVC controller based on MSFLA (MSFLA SVC) are compared with the Strength pareto evolutionary algorithm (SPEA) and Particle swarm optimization (PSO) based optimized PSS and SVC through some performance to reveal its strong performance. Keywords:Modified shuffled frog leaping algorithm (MSFLA), PSS and SVC design, Multi machine power system, Strength pareto evolutionary algorithm (SPEA), Particle swarm optimization (PSO).

Stability Enhancement of Electric Power Systems by Employing Variable Frequency Transformer

“…Flexible AC transmission (FACTS) devices opened a new avenue in damping of these lowfrequency oscillations. Different FACTS devices like thyristor controlled series compensator (TCSC), static VAR compensator (SVC), static synchronous series compensator (SSSC) have been used to suppress oscillations and enhance damping of power systems [12,13]. Since primary objective of these devices is to assist the voltage regulation and power flow, hence rather than finding best installation locations of these controllers, the real problem is whether the proposed FACTS controller can effectively damp the low-frequemcy oscillations.…”