Abstract: Today’s energy-generating sector is seeing a significant growth in of the wind power globally. Typically wind plants are typically located in rural areas, hence long high-voltage transmission lines are necessitated to integrate them to the grid. Series capacitive compensation is a quick and cost-effective way to increase the power transfer capacities of the transmission line that connects the wind plant to the grid. The main contribution of this paper is the detection and mitigation of sub-synchronous resonance (SSR) in doubly fed induction generator (DFIG) based wind plants owing to the installation of series capacitors in the transmission line. This paper examines the effectiveness of a static synchronous compensator (STATCOM) to reduce the risk of sub-synchronous resonance (SSR). A detailed Eigen value analysis with time domain simulations is shown to demonstrate how STATCOM successfully lowers the SSR. After incorporating STATCOM, the fluctuations in electromagnetic torque of DFIG is greatly reduced.

Keywords: Sub-synchronous resonance, static-synchronous series capacitor, series compensation.