Interarea-Oscillation Damping with Dual Power Oscillation Damping Controller of a Utility-Scale Wind Power Plant

Abstract

This paper investigates the potential of a utility-scale wind power plant (WPP) as a power oscillation damping (POD) controller to improve the system’s dynamic response to inter-area oscillation, especially with high-renewable and low-inertia systems. Type IV based WPP utilizes active power (P) and reactive power (Q) controls simultaneously by adding two separate P-based and Q-based PODs to the machine-side converter (MSC) and grid-side converter (GSC), respectively. For the P-based POD, the kinetic energy of the wind turbine is utilized according to an estimated power angle. It mitigates the necessity of any curtailment of active power for damping. For the Q-based POD, the Q reference is adjusted according to the rotational speed of a synchronous generator. During the damping control, a higher priority is given to P control in both of the MSC and GSC controllers. This paper uses the local bus angle and speed of the nearest synchronous generator as the feedback for each of these loops. The effectiveness of the proposed control scheme is verified with a three-phase short circuit fault in a two-area power system. The proposed method is also compared with the conventional technique to investigate the superiority of the proposed controller.