With the increasing scale of wind farms in the western region of China and the scarcity of power access points, resulting in higher coupling between the traction house and wind farms, the negative sequence problem faced by the electric railway has become more serious. Therefore, considering the active compensation capability of doubly-fed wind farms, a negative sequence optimization compensation strategy is proposed for an electrified railway connecting to the power grid in a wind power area. First, the negative sequence impedance models of an electrified railway traction substation and doubly-fed wind farm are established. The traction substation includes V/v connected TPSS and a static VAR generator (SVG). Second, the negative sequence characteristics of V/v connected TPSS are analyzed, and a negative sequence propagation model including active compensation capability of the wind farm is derived. Then, the remaining capacity calculation method of a doubly-fed induction generator (DFIG) is given. A negative sequence optimization compensation strategy for controlling SVG and DFIG collaboratively is proposed. Finally, based on the Matlab/Simulink simulation platform, the correctness and effectiveness of the compensation strategy are verified. Compared with the traditional negative sequence compensation strategy for an electrified railway, the strategy proposed in this paper can effectively reduce the actual compensation capacity of SVG and increase the operating life of the device.