基于5G边缘计算的配电网差动保护时延优化策略

5G MEC based delay optimization strategy of differential protection of distribution network

针对配电网差动保护中的时延需求,结合5G通信的技术优势,提出多接入边缘计算(MEC)和数据采集与监控系统(SCADA)联合时延优化方案。为了快速准确地排查线路故障区域,提出了5G MEC+SCADA差动保护系统模型,并分析了通信、计算模型以及配电网的时延要求,在此基础上,建立了计算能力和时延约束下的时延优化问题模型,并通过约束条件引入松弛变量来最小化端到端的延迟。仿真分析了差动保护任务在不同情况下的时延,结果表明该方案能有效地降低纵向信道的时延。

In allusion to the delay requirement in differential protection of distribution network,a joint delay optimization scheme of multi⁃access edge computing(MEC)and supervisory control and data acquisition(SCADA)is proposed in combination with the technical advantages of 5G communication.In order to quickly and accurately check the line fault area,a 5G MEC+SCADA differential protection system model is proposed,and the delay requirements of communication,calculation model and distribution network are analyzed.On this basis,a time delay optimization model of the calculation capability and delay constraints are established,and the slack variables are introduced according to constraint conditions to minimize the end⁃to⁃end delay.The time delay of the differential protection under different conditions was simulated and analyzed.The results show that the scheme can effectively reduce the time delay of the longitudinal channel.