摘要
随着分布式电源的高度渗透和环网结构的逐步增多,配电网迫切需要电流差动保护应对过流保护面临的挑战。基于5G的商用化契机,研究开发一种基于5G通信的配电网分布式差动保护。该保护采用基于移动边缘计算的切片网络作为数据通道,具有超低延时和超高可靠的特点;采用基于故障时刻的自同步方法解决差动保护两端的数据同步问题,无需增加额外对时装置。在5G智能电网应用示范区,对所开发装置进行了单基站和跨基站环境下的综合测试,并投入10 kV线路试点运行。现场测试结果与试运行数据表明,差动保护性能满足配电网工程应用要求。
With the high penetration of distributed generation and the gradual increase of ring network structure,distribution networks urgently need current differential protection to overcome the challenges faced by over-current protection.Taking the opportunity of 5G commercialization,this paper develops a distributed differential protection for distribution networks using 5G.In this protection system,a sliced network based on mobile edge computing is deployed as a data channel.This has the feature of ultra-low latency and ultra-high reliability.The fault instant-based self-synchronization method is adopted to realize the data synchronization required by differential protection.It has no need for additional timing devices.In a demonstration of 5G application for the smart grid,the developed relays are comprehensively tested under both single and crossing base station environments.The relays have been put into use in a 10 kV feeder for test run purposes.Both field test results and test run data indicate that the performance of the proposed differential relays meet the requirements of a distribution network in engineering application.
作者
高厚磊
徐彬
向珉江
李立生
徐群
张陶
李坤
陈恒
高维良
GAO Houlei;XU Bin;XIANG Minjiang;LI Lisheng;XU Qun;ZHANG Tao;LI Kun;CHEN Heng;GAO Weiliang(School of Electrical Engineering,Shandong University,Jinan 250061,China;State Grid Jinan Power Supply Company,Jinan 250012,China;State Grid Shandong Electric Power Research Institute,Jinan 250003,China;State Grid Qingdao Power Supply Company,Qingdao 266002,China;Shandong Kehui Power Automation Co.,Ltd.,Zibo 255087,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2021年第7期1-9,共9页
Power System Protection and Control
基金
国家电网公司总部科技项目资助(5100-20205501 8A-0-0-00)
山东电力公司科技项目资助(5206011900DG)。
关键词
5G通信
网络切片
uRRLC场景
配电网
差动保护
自同步
故障时刻
5G communication
network slice
uRRLC scene
distribution network
differential protection
selfsynchronization
fault instant
