In this paper

on the basis of explaining the working principle of the current- limiting SSSC

the SSSC is adopted to strengthen the electrical connection between the sending end and the receiving end of the wind- thermal binding system. Based on the equivalent external characteristics of the doubly fed induction generator

a power model is established for the wind- thermal binding system with the current- limiting SSSC in normal operation

fault periods

and after faults. The relationship between the limiting resistance of the current- limiting SSSC and the defined initial swing transient stability margin is derived through the area- equal principle. A strategy is proposed to ensure the stability of the initial swing during fault periods by injecting the limiting resistance. The influence of wind power active power recovery and the compensation degree of the SSSC on the electromagnetic power after the fault removal is analyzed

and a control strategy is proposed to suppress the power oscillation after the first swing by changing the compensation degree of the SSSC according to the change of the angle of attack of the steam turbine and the recovery of wind power in each odd and even swing process. The simulation results in Simulink show that the control strategy of the current- limiting SSSC in different swing periods can effectively improve the transient stability of the wind- thermal binding system.