Abstract：Based on the parallel structure of high-power converter system，a high real-time and high

synchronization optical-fiber communication scheme was proposed. The on-fly transmission ensures that the

communication between the controllers has a low delay，and the clock synchronization algorithm compensates the

time-difference between the master-controller and slave-controller，which ensure clock synchronization of all the

controllers in the system to reduce circulation and its harm. When the system needs to run down or has a serious

fault，the system could respond in time by changing the number of slave controllers in the optical-fiber

communication network actively or passively，which provided flexible communication solutions for high power

converter systems. The experimental results show that the proposed optical-fiber communication scheme is effective.

      Key words：converter system；optical-fiber communication；synchronous drive；reduction strategy；fault

strategy