Abstract
Power System Stabilizers (PSSs) at conventional synchronous generators have proved to be effective in suppressing both local and inter-area low-frequency oscillations (LFOs). However, the retirement of conventional synchronous generators and the increasing penetration of inverter-based resources (IBRs) can potentially lead to insufficient stabilizing capability available from the remaining conventional synchronous generators. In this paper, the control performance of Power Oscillation Damping (POD) through IBRs with either wide-area measurements or local measurements as an input signal is investigated. The performance of IBR based POD control is also compared with wide-area POD control via synchronous generators. Case studies are carried out on a synthetic Texas power system model. Simulation results demonstrate that the proposed POD through active power modulation of IBRs is more effective than POD through reactive power modulation of IBRs and wide-area POD via synchronous generators. The proposed POD can be supplementary to the PSSs at conventional synchronous generators for power grids with high renewable penetration.
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