为了解决继电保护装置内部通信问题，提出了一种基于CAN总线的继电保护装置内部通信机制设计方案。通过对装置内CPU模件与开入、开出模件通信的特性进行分析，对CAN总线ID分段、数据传输及重发机制、通信故障处理机制进行了设计。方案实现了继电保护装置多CPU、多IO组态下的实时、可靠通信。实际应用表明，具有高效、可靠性高的优点，达到了设计需求。%In order to solve the problem of internal communication between relay protection devices, an internal communication mechanism for protective relay devices based on CAN bus is designed in this paper. Through analyzing characterics of the communication between between CPU modules and input and output modules, ID block, data transmission and retransmission mechanism, the communication failure processing mechanism based on CAN bus is designed.It is realized the real-time and reliablely communcation between multi-CPU and multi-IO. The experiment and application show that this design has characteric of high performances and relability,achieve the design requirement.
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