Communication system and control method of cascaded converter module unit

Abstract

The invention discloses a communication system of a cascaded converter module unit and a control method thereof. The communication system includes a data sending module and a data receiving module. If no failure occurs, the data sending module sends an analog frequency coded signal to to the data receiving module; if a failure occurs, connect each semaphore to the corresponding frequency generator through the D flip-flop, and select the semaphore frequency with the highest priority and send it to the multiplexer according to the priority among different semaphores , and send it to the data receiving module through the optical fiber transmission interface circuit; the data receiving module searches the state table according to the frequency of the control command, determines the specific command value, and then connects to the corresponding switching device. Compared with the traditional packet communication frame encapsulation method, this technical solution has simpler logic and faster transmission speed than the traditional serial communication method; it overcomes the influence of high-voltage electromagnetic interference to the greatest extent and has good expansion sex.

Description

technical field [0001] The invention belongs to the technical field of application of communication technology in power systems, and in particular relates to a modular unit optical fiber communication system of cascaded converters and a control method thereof. Background technique [0002] Due to the high voltage level and large rated capacity of the cascaded converter, the overall operating environment of the system is relatively complex, so there is relatively large electromagnetic interference in the actual operation process. On the other hand, due to the high power of its power module, when it fails, it will have a significant impact on the output of the cascaded converter. Therefore, no matter from the perspective of system reliability or equipment stability, it is necessary to have the ability to quickly respond to faults. The traditional packet communication frame encapsulation method has problems such as slow response speed and difficult implementation due to the sho...

AI Technical Summary

Problems solved by technology

The traditional packet communication frame encapsulation method has problems such as slow response speed and difficult implementation due to the shortcomings of multiple layers of communication protocol encapsulation and complex protocol stack.

Due to the shortcomings of low communication code rate, the traditional serial communication method has the problem of slow communication speed, which needs to be improved

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