支持新型电力系统的5G/6G高可靠低时延电力物联网通信设计与分析  

Design and Analysis of 5G/6G Power Internet-of-thing Communications With High-reliability and Low-latency for Supporting New Type Power Systems

作　　者：曾琦[1] 刘友波[1] 李梓玮 马超 钟俊[1] 刘星[1] ZENG Qi;LIU Youbo;LI Ziwei;MA Chao;ZHONG Jun;LIU Xing(School of Electrical Engineering,Sichuan University,Chengdu 610065,Sichuan Province,China;State Grid Sichuan Integrated Energy Service Co.,Ltd.,Chengdu 610072,Sichuan Province,China)

机构地区：[1]四川大学电气工程学院,四川省成都市610065 [2]国网四川综合能源服务有限公司,四川省成都市610072

出　　处：《中国电机工程学报》2024年第21期8435-8443,I0009,共10页PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING

基　　金：四川省科技计划项目(2022YFG0123,2023NSFSC0480);物联网标准与应用工业和信息化部重点实验室2023年开放基金(202303)。

摘　　要：新型电力系统中“源-网-荷-储”协同控制具有大规模节点接入、双向可靠和广域低时延的信息传输需求,是5G通信重要垂直应用场景。然而,现有民用5G通信无法完全满足电力业务互动控制对高可靠和低时延的信息传输需求。该文在5G标准基础上,将子载波跳频技术(frequency hopping,FH)应用于可配置正交频分复用(orthogonal frequency division multiplex,OFDM)系统中,形成OFDM/FH传输新体制,为新型电力系统提供多业务接入和高可靠的信号传输方案;同时,考虑控制业务短包和突发特性,将OFDM/FH信号传输与5G/6G微时隙(mini-slot)调度策略融合,以mini-slot为基本单位的资源调度和重传机制能有效降低时延。随后,通过理论分析,揭示该电力物联网(Internet-of-things,IoT)通信系统传输可靠性与重传时延的内在折中关系。通过对无线通信物理层信号处理和媒介接入层时隙调度联合设计,该文提出的基于mini-slot调度架构OFDM/FH的电力物联网5G/6G通信方案,可支持“源-网-荷-储”多业务泛在接入、高达99.999%传输可靠性和毫秒级低时延要求,实现了5G/6G高可靠低时延通信(ultrareliability and low-latency communications,uRLLC)与泛在电力控制业务的深度融合。The collaborative control of source-grid-load-storage services in new power systems have the multiple requirements for information transmission including large-scale node access,bidirectional reliability and wide-area low latency,which is an important and vertical application scenario for 5G communications.However,the civilian 5G cannot fully meet the high-reliability and low-latency requirement of information transmission in collaborative control of power services.Based on the current 5G standard,subcarrier frequency-hopping(FH)is applied into the configurable orthogonal frequency division multiplex(OFDM)system in this paper,resulting in a new OFDM/FH scheme,which provides multiple access and high reliability transmission for"source-grid-load-storage"services.Meanwhile,thanks to the characteristics of the control service with short and burst packet,the OFDM/FH signal transmission is integrated with the mini-slot scheduling strategy of the 5G/6G network.The resource scheduling and retransmission mechanism based on the mini-slot can effectively reduce the transmission latency.Subsequently,with the theoretical analysis,the trade-off relation between transmission reliability and retransmission latency of the proposed power internet-of-things(IoT)communications system is derived.Through the design of 5G/6G network in the perspective of the signal processing in the physical layer and the slot scheduling in media access layer,the proposed OFDM/FH based on mini-slot scheduling can support the multi-service access of source-grid-load-storage,up to 99.999%transmission reliability and ms-level low latency.It successfully realizes the deep integration of 5G/6G ultra-reliability and low-latency communications(uRLLC)with ubiquitous control services in power grids.

关 键 词：电力物联网通信 电力业务 可靠性 时延性 系统设计 

分 类 号：TM73[电气工程—电力系统及自动化]