Mitigation of Sub Synchronous Resonance in a Series Compensated Wind Farm Using SVC

Abstract

Series compensation is a well known technology which is used to increase the power transfer capability of the transmission lines. When the level of series compensation is more, it causes sub synchronous resonance. This paper presents a study of sub synchronous oscillations due to torsional interactions and induction generator self-excitation effects in a wind farm. Sub synchronous resonance will affect the system if adequate control measure is not taken. A static var compensator (SVC) with a voltage controller is connected at the induction generator terminal to damp the sub synchronous oscillations. Time domain simulations are carried out using EMTDC/PSCAD to validate the result.