北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2024, Vol. 47 ›› Issue (2): 110-117.

• 研究报告 • 上一篇    下一篇

基于TSN的智能变电站流量确定性传输

池颖英1,朱海龙2,3,李庆2,郑哲1,刘瑞1   

  1. 1. 北京智芯微电子科技有限公司
    2. 网络通信与安全紫金山实验室
    3. 北京邮电大学网络与交换国家重点实验室
  • 收稿日期:2023-03-15 修回日期:2023-07-26 出版日期:2024-04-28 发布日期:2024-01-24
  • 通讯作者: 李庆 E-mail:liqingtsn@163.com
  • 基金资助:
    北京智芯微电子科技有限公司高层次人才科研专项项目资助

Research on Flow Deterministic Transmission in Smart Substation based on TSN

  • Received:2023-03-15 Revised:2023-07-26 Online:2024-04-28 Published:2024-01-24
  • Contact: Qing LI E-mail:liqingtsn@163.com

摘要: 针对智能变电站三层两网及点对点传输架构存在的布线复杂和运维效率低下的问题, 设计了一种基于时间敏感网络(TSN)的智能变电站“全站共网”的组网方案,以实现多种类型智能变电站报文在同一网络中混合传输。考虑到智能变电站通信网络流量种类较多,针对较低时延要求的突发性事件报文和周期性报文混合传输带来的不确定性问题, 利用 IEEE 802. 1Qbv 中的时间感知整形器功能,对网络中所有具有时延要求的流量进行了调度规划,制定了流量调度约束,并求解了网络设备流量传输的调度参数。设计了2个场景下的仿真实验,将调度参数配置到仿真实验中的 TSN 节点,使得流量按照求解的时隙进行传输,并对有无 Qbv 门控调度和背景流量的干扰进行了多组对比实验。实验结果表明,制定的 Qbv 门控调度策略能够保证智能变电站多种流量的混合传输,具有严格时延要求的流量能够在专门的时隙中进行传输,调度流量不受背景流量的干扰,实现了智能变电站报文的低时延确定性传输。

关键词: 智能变电站, 时间敏感网络, 802.1Qbv, 流量调度

Abstract: There are many kinds of traffic in the communication network of smart substations, and there are unexpected event messages with low delay requirements. At present, smart substation adopts hierarchical networking and point-to-point communication mode for data transmission. In order to achieve the deterministic transmission of all messages in the same network, a TSN-based networking scheme for smart substation called " entire substation sharing network " is designed to realize mixed transmission of various types of smart substation messages in the same network. For the periodic and unexpected event-driven traffic in the smart substation, the time-aware shaper function in TSN 802.1Qbv is used to schedule all traffic with time-delay requirements in the network, formulate traffic scheduling constraints, and calculate configuration parameters of network device for traffic transmission. The simulation experiment is designed, and the calculated configuration parameters are configured to the TSN node in the simulation experiment, so that the traffic is transmitted according to the solved time slot. In the simulation experiment, multiple groups of comparative experiments were carried on the presence or absence of Qbv scheduling and interference from background traffic. Experiments show that the Qbv scheduling strategy can ensure the mixed transmission of multiple traffic in smart substation, and the traffic with strict delay requirements can be transmitted in the special time slot. The scheduled traffic is not interfered by the background traffic, achieving low delay and deterministic transmission of messages in the smart substation.

Key words: smart substation, Time Sensitive Networking, 802.1Qbv, flow scheduling

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