The Effect of DFIG on Electromechanical Oscillation with Combined Reactive Power Damping Control and Virtual Inertial Control

摘要

In this paper, an investigation on oscillation damping enhancement of DFIG with the combined reactive power damping control (RPDC) and virtual inertia control (VIC) is conducted. A brief principle introduction on RPDC and VIC is presented firstly. Then the effect of VIC loop and RPDC loop on the electromechanical oscillation modes of power system is analyzed independently, it is revealed that the system damping will be enhanced by increasing the RPDC coefficient. The finding is tested using a modified four-machine and two-area system. Further eigenvalue analysis, time-domain simulation and Prony analysis of the case study can verify the theoretical results.¹