基于异步整形机制的智能变电站通信队列调度策略  

A Communication Queue Scheduling Strategy for Intelligent Substations Based on Asynchronous Shaping Mechanism

作　　者：贾惠彬[1] 武文瑞 吴堃 刘宇[2] 常乃超[2] Jia Huibin;Wu Wenrui;Wu Kun;Liu Yu;Chang Naichao(Department of Electronic and Communication Engineering North China Electric Power University,Baoding 071003 China;State Grid Dispatching and Control Center,Beijing 100031 China)

机构地区：[1]华北电力大学电子与通信工程系,保定071003 [2]国家电网公司国家电力调度控制中心,北京100031

出　　处：《电工技术学报》2024年第17期5422-5433,共12页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2021YFB2401000)。

摘　　要：时间敏感网络(TSN)因能为智能变电站关键通信业务提供确定性低延时传输服务而得到广泛关注。针对现有变电站工业以太网交换机通信队列调度策略难以从理论上保证关键通信业务的实时性和可靠性的问题,该文提出了基于TSN异步整形机制(ATS)的智能变电站通信队列调度策略。首先,基于智能变电站业务流服务质量需求及传输特点,提出了智能变电站业务流的优先级划分及整形队列分配方案;其次,建立了以业务流端到端时延最小化为目标的整形器参数最优化模型,并通过内点优化算法求解;最后,整形器采用基于令牌桶的流量整形方法对划分后的业务流进行整形,整形后的流量基于严格优先级算法调度传输。基于OMNet++进行了仿真实验,实验结果表明,该文所提方法能够保障关键通信业务的确定性低时延传输。ed as minimizing end-to-end delay for business flows,taking into account multiple constraints.An optimization model for the parameter of an intelligent substation traffic shaper was proposed,and the optimal model was solved using the interior point optimization algorithm based on Matlab software.The calculated optimal traffic shaper parameters ware then configured into the shapers of the TSN switches in the SCN.This shaper shaped the traffic that enters the shaping queue.The shaper adopted a traffic shaping method based on the token bucket algorithm to allocate the eligible time for frame transmission.Finally,the post-processed business flow entered the corresponding scheduling queue based on the priority division and was scheduled using a strict priority algorithm.The data frames in the scheduling queue were arranged in ascending order based on the eligible time.That is to say,the data frames were scheduled for transmission based on the eligible time and priority parameters.If the eligible time of the data frame at the front of the scheduling queue was earlier than the current time,the data frame could be transmitted.Otherwise,if the current queue data frame couldnot be sent,the data frame from the next priority queue was transmitted.The communication queue scheduling strategy proposed in this paper was implemented based on the INET4.4 framework of the OMNet++network simulation platform.Additionally,a simplified model of the intelligent substation communication network was constructed for simulation experiments.The experimental results demonstrate that the proposed method can ensure deterministic low-latency transmission of critical communication services and enhance the service quality of business flows,even when high-priority traffic bursts and causes network congestion.This improvement was in comparison to traditional SPQ scheduling strategies.Furthermore,in cases where the time synchronization of the substation communication network failed,the proposed strategy can still guarantee the real-time transmission

关 键 词：智能变电站 时间敏感网络 异步整形 通信队列调度 

分 类 号：TM73[电气工程—电力系统及自动化]