Integrated Measurement and Model Based Fast Small Signal Stability Assessment for Renewable Integrated Power Systems

Increased penetration of renewable energy sources (RES) into the power grid will change the dynamic behavior of the system which was earlier dominated by synchronous generators. A detailed study on the impact of Type-IV wind turbine generators (WTG) on the inter-area mode is carried out in this paper. The frequency of oscillation (FOO) and the corresponding damping of inter-area mode for different tie-line power is analyzed. Fast-Small Signal Stability Assessment(Fast-SSSA) application, a hybrid method that utilizes both measurements as well as model-based inputs is proposed for stability assessment considering the damping limit of inter-area mode. The practical implementation of the proposed method for control room application is detailed. The suggested methodology provides a faster and more accurate stability assessment software solution for the control room application.