A strong action power system stabilizer employment to improve large scale power systems’ stability

Abstract

Latest computer techniques improvements make developed control procedures implementation achievable at the generating level. Till now, power system stabilizers (PSSs) can be considered as one of these advanced control strategies. PSSs were used for a long time to dampen most types of system oscillations. In the current paper, PSSs used are a new design based on the idea of strong action (SA) controllers. Previous studies concerning power systems that accompanied by the assistance of the proposed SA-PSS were carried out in two different cases: single synchronous machine and multimachine power systems. In the current paper, the SA-PSS was used in a real part of the 500 kV Egyptian electricity grid that containing the scheduled El- Dabaa nuclear power station. The simulation results demonstrated the adequacy of the utilization of the suggested SA controller based PSS. SA-PSS can accomplish system stability which permits expanding essentially the stability margin at the steady-state interval, damping oscillations adequately, and stabilizing subtransient and transient processes. Additionally, it aids to avoid the abrupt reductions of all power system nodes’ voltages. This novel approach demonstrated its effectiveness in mitigating both of machine frequency and voltage fluctuations, which represents a new voltage/frequency control method. Consequently, the enhanced stability of the system is accomplished.