A nonlinear controller based on feedback linearization technique was proposed to mitigate subsynchronous control interaction (SSCI) in seriescompensated doubly fed induction generator (DFIG). The feedback linearization controller was developed for rotor side converter (RSC) and grid side converter (GSC) through four necessary steps, i.e., assessment of the feedback linearizability, coordinate transformation, feedback linearization, and derivation of control laws. A DFIGbased wind farm adapted from the IEEE first benchmark model was utilized to evaluate the performance of the designed controller at varied wind speeds and compensation levels, and the capability of the proposed controller in mitigating SSCI was compared to a welltuned proportionalintegral (PI) controller. The simulation results demonstrated the superior damping performance of the designed controller.