High percentage renewable energy DC feeder systems may have serious transient overvoltage problems after DC faults. The use of distributed synchronous condenser can suppress the transient overvoltage of renewable energy field station feeder and maintain the power system steady-state reactive power balance, but there is still a lack of research on the coordinated multi-resource reactive power control method of renewable energy field station with distributed synchronous condenser. To address the above problems, this paper proposes a coordinated reactive power control method for renewable energy field station with distributed synchronous condenser. First, the steady-state reactive power output range of the distributed synchronous condensers is determined under different tap positions of the distributed synchronous condensers step-up transformers, as well as their leading/late phase capability. Subsequently, considering the leading/late phase capability and steady-state operation mode of the distributed synchronous condensers, the appropriate tap position of the condenser step-up transformers is selected. Finally, based on the status of automatic voltage control communication, the steady-state reactive power output of the reactive power regulation equipment is coordinated and controlled. Experimental results indicate that the proposed method ensures the reactive power output capability of the distributed synchronous condensers, effectively suppressing transient overvoltages at the sending-end system while fulfilling the reactive power balance requirements of renewable energy generation systems.