Unified Philips-Heffron Model of Multi-Machine Power System Equipped with PID Damping Controlled SVC for Power Oscillation Damping

This paper presents a novel approach to small signal stability enhancement using static VAR compensator (SVC) with PED damping controller. Static VAR compensator is proven the fact that it improves the dynamic stability of power systems apart from reactive power compensation; it has multiple roles in the operation of power systems. The supplementary auxiliary control signals to SVC play a vital role in mitigating the rotor electro-mechanical low frequency oscillations. A proportional-integral-derivative (PID) type controller is designed using the generator speed deviation, as a modulated signal to SVC, to generate the desired damping, is proposed in this paper. The PID damping controller for SVC is used to improve the dynamic performance of power system by reducing the steady-state error and for fast settling. The simulations are carried out for Multimachine power system at different operating conditions.