Investigations of Large-Scale Voltage-Dependent Loads for Damping Low-Frequency Oscillations: Decentralized Control

The article discusses the influence of voltage-dependent load (VDL) models on the design of power system stabilizers (PSSs) for damping critical low-frequency electromechanical oscillations (LFEOs). In the proposed approach, local information available at each machine with nearby connected VDLs in the multimachine environment is considered to tune the parameters of the PSS. Using eigenvalue analysis and nonlinear time-domain simulations, the effectiveness of the proposed method is demonstrated in effectively damped LFEOs across a wide range of operating conditions. Simulation studies carried out on the IEEE 39- and 68-bus multimachine power systems showcase the superiority of the proposed approach over conventional methods.