The invention provides a large-scale parallel
system-based distributed communication
system and a control method of the large-scale parallel
system-based distributed communication system. According to the control method, at a time of the triangle-carrier wave peak of a PWM (pulse-width modulation) module, sub-controllers pack collected analog signals and digital signals of a corresponding converter cabinets into a user-defined one-frame
data format, and transmit the packet to a main controller, and trigger start signals are generated after all the sub-controllers transmit the collected data to the main controller; the main controller is responsible for the
control algorithm and the treatment of fault signals, reads the data transmitted by the sub-controllers after receiving the trigger signals, and transmits control command information to each sub-controller after the computing treatment; the sub-controllers control the corresponding
PWM converter cabinets after receiving the control information. Namely, one transmitting and receiving process can be completed by the distributed
communication control. By the system and the control method, the modularization and the parallel control of the
wind power converter can be easily realized, the faults of the system can be easily positioned, and the circulation flow and the uneven flow of the parallel system can be effectively restrained.