Abstract: Aiming at the transient stability problem after the wind farm is connected to the interconnection system, the causes of low-frequency oscillations were analyzed. A control strategy for multi-band power system stabilizer (MB-PSS) and static var compensator (SVC) combined operation was proposed, and the objective function was optimized to set improve the stability of system operation. The wind farm was connected to an IEEE two-region four-machine interconnected system, and the four operating conditions were simulated and verified on the MATALB simulation platform. The results show that the proposed strategy has superior performance in suppressing interval low-frequency oscillation and stabilizing system voltage, and can effectively improve the power system Transient stability and power quality.