Analysis of electromechanical mode damping characteristics of stand-alone - SVC - infinity system

power system;  small perturbations;  model;  SVC;  Damping

In order to provide a more rigorous theoretical basis for the study of the damping characteristics of static reactive power compensator (SVC), an intuitive linearization model (extended model) of stand-alone svc-infinity system considering the damping winding of generators is established, and the characteristic roots of the system are calculated for different situations, and the relevant factors affecting the magnitude of SVC damping are discussed. The results show that when SVC has damping control, it can provide positive damping to the power system. When SVC only has voltage control, it has little effect on system damping; When SVC has both voltage and damping control, increasing the voltage control gain will weaken the role of damping control; From the perspective of improving system damping, the best installation location for SVC is near the midpoint of the transmission line.