Utilization of Local Phasor Measurements for Interarea-Oscillation Damping with Utility-Scale PV Plant

Abstract

This paper proposes a power oscillation damping (POD) control scheme utilizing a photovoltaic (PV) power plant, improving the power systems' dynamic response to interarea oscillations, particularly for high-renewable and low-inertia systems. To achieve this, two separate control loops, an active power modulation loop without curtailment and another loop with reactive power current injection, have been utilized in a two-area system. The feedback for these damping controllers is taken from Phasor Measurement Units (PMUs) located far from the controllers, making these signals highly susceptible to communication time delays, failures, and cyber-attacks that may compromise controller performance. This paper uses the local bus angle and bus voltage at the PV plant's point of interconnection (POI) as the feedback for each of these loops. We verified the effectiveness of the proposed control scheme with a three-phase short circuit fault in a two-area power system. We also compared the proposed method with the conventional technique to investigate the superiority of the proposed controller.