Abstract: “To boost a transmission line’s capacity for power transfer, series compensation is required. However, when we use series compensation there is risk of sub-synchronous resonance (SSR). With the increasing penetration of renewable generation resources, power grids have become more susceptible to sub-synchronous resonance phenomena, especially to sub synchronous control interaction, which produces fast-growing oscillations. This leads to mechanical fatigue of the shaft on which the turbine and generator are connected. Till now, different techniques have been proposed, like eigenvalue, frequency scan, and time domain simulation to study sub-synchronous resonance. In this paper we compare methods for detection of SSR. Proposed method is Stockwell transform. Proposed methods were compared with traditional method i.e., Fast Fourier Transform (FFT). The reliability and effectiveness of the method have been validated on IEEE first benchmark model. The model was simulated in ATP and all the im”

Keywords: FFT, FACTS, HVDC, Prony analysis, Relay, Series compensation, SSR, Stockwell transform.