Anti-interference carrier synchronization control method and system based on time base synchronization, and medium

By using a time-based synchronization-based anti-interference carrier synchronization control method, carrier synchronization of multiple energy storage inverters was achieved using DSP and CAN transceivers, solving the problem of carrier signal asynchrony and improving the system's stability and anti-interference capability.

CN122120080APending Publication Date: 2026-05-29CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO LTD
Filing Date
2024-11-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, when multiple energy storage inverters are connected in parallel on the AC output side, the asynchronous carrier signals lead to a decline in power quality and system instability. Existing synchronization methods are complex, costly, or have weak anti-interference capabilities.

Method used

An anti-interference carrier synchronization control method based on time-base synchronization is adopted. By configuring the PWM time-base synchronization strategy of the digital signal processor (DSP), the CAN transceiver is used to convert the signal into a differential signal for transmission and perform phase compensation processing to achieve carrier synchronization between the slave device and the master device.

Benefits of technology

It simplifies system design, improves system real-time performance and efficiency, enhances anti-interference capabilities, and ensures the stability and accuracy of carrier signals.

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Abstract

The application provides a time base synchronization-based anti-interference carrier synchronization control method, system and medium, which comprises the following steps: step 1: a master device generates a time base synchronization signal, and the time base synchronization signal is subjected to signal conditioning treatment such as pulse width expansion, period adjustment or signal screening by a CPLD; step 2: the time base synchronization signal is converted into a differential signal by a CAN transceiver and transmitted to all slave devices through a CAN bus; and step 3: after receiving the differential signal, the slave device converts the differential signal into a single-ended signal through the CAN transceiver, configures a PWM pulse controller of a digital signal processor (DSP) of the slave device, takes the time base synchronization signal generated by the master device as a synchronization source of all PWM channels, and reloads a PWM time base count value when the digital signal processor (DSP) of the slave device detects a rising jump edge, so as to realize synchronization of a carrier of the slave device and a carrier of the master device. The application has the advantages of simple structure, low cost and strong anti-interference capability.
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