Equipped with synchronous condenser in UHVDC converter station can provide dynamic support for AC network and improve system stability, but the current synchronous condenser and the AC filter in converter station are controlled separately, and there is no logical coordination between them. In view of this problem, considering the existing control strategies and characteristics of synchronous condenser and AC filter in converter station, a steady state reactive power coordinated control strategy is proposed. The data exchange between the control systems of them is realized. On the premise of ensuring that the dynamic support function of the synchronous condenser to AC network is not affected, the DC control system calls part of the steady-state reactive power capacity of the synchronous condenser to make it cooperate with the AC filter in converter station for reactive power balance control, thus giving full play to the role of reactive power compensation of the synchronous condenser. Finally, the strategy is validated by the simulation test. This work is supported by Science and Technology Project of the Headquarters of State Grid Corporation of China (No. 52153218000H).