一种基于自响应机制的环网冗余通信方法

摘要

基于多模光纤构建的智能变电站通信网络缺乏一种冗余方法来保证通信的高可用性，提出一种基于自响应机制的环网冗余方法提高通信的可用性。该方法通过环网交换机自行判断响应并设置端口状态的方式来实现既定的冗余保护功能，通过构造交换芯片能够识别处理的数据帧作为测试帧的方式控制CPU端口的数据量，合理分配并有效利用CPU资源来缩短冗余恢复时间。通过实验室自有的环网交换机运行该冗余通信方法模拟智能变电站系统平台进行测试，结果表明该方法冗余恢复时间小于30 ms，相比MRP协议环网交换机运行该方法时CPU负荷降低近10%，有效保证了智能变电站中多模光纤网络通信的实时性和可靠性。%Against the lack of a redundancy method to ensure the smart substations’ high availability of the communication based on multi-mode fiber, this paper presents a ring network redundancy method, which is based on the response mechanism to improve communication availability. This method achieves the redundancy protection by the ring network equipments’ determining the response and setting the port status, controls the amount of CPU port’s data by constructing data frames that can be identified and processed by switch chip as test frames, and shortens the redundant recovery time by the rational allocation and effective utilization of the CPU. The method is applied to the simulation tests in the smart substation system using the ring network equipments of the laboratory. Tests show the redundancy recovery time is less than 30 ms. Compared with MRP protocol, the load of the device itself is reduced about 10% when running this method. This method ensures the real-time and reliability of communication based on multimode optical network in the smart substations.