基于5G授时的配网差动保护数据同步方案  

5G timing base data synchronization scheme for differential protection of distribution networks

作　　者：向珉江[1] 袁通 苏善诚 刘宝[1] 申文伟[1] 高厚磊[2] XIANG Minjiang;YUAN Tong;SU Shancheng;LIU Bao;SHEN Wenwei;GAO Houlei(State Grid Jinan Power Supply Company,Jinan 250012,China;School of Electrical Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]国网济南供电公司,山东济南250012 [2]山东大学电气工程学院,山东济南250061

出　　处：《电力系统保护与控制》2021年第8期8-15,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51877127);山东省电力公司科技项目资助(5206011900DG)。

摘　　要：在配网中实现基于5G通信电流差动保护的关键技术之一是区段两端电流数据的同步问题。分析现有数据同步方法应用于5G电流差动保护的适应性;介绍5G协议中时间同步指标及实现架构;在此基础上,提出利用5G通信中的高精度时间信息实现数据同步的实用化路线。在该路线中,设计一种基于5G信号参数的基站授时方案;给出两种适用于配网电流差动保护的对时信号;最后提出基于B码对时信号的电流差动保护数据同步方法并分析其误差。理论上所提方案可实现线路两端时间同步偏差不超过20.8μs,对应两侧电流相角偏差不足0.5°,完全满足电流差动保护要求。One of the key technologies for realizing the current differential protection principle based on 5G communication in distribution networks is current data synchronization at both ends of a section.This paper analyzes the adaptability of the existing data synchronization methods to 5G current differential protection and introduces time synchronization indexes and implementation architecture in the 5G protocol.This paper proposes a practical route of data synchronization using high-precision time information in 5G communication.A timing scheme for a base station based on 5G signal parameters is designed.Two types of timing signals suitable for current differential protection of a distribution network are introduced.We propose a current differential protection data synchronization method based on the B-code and analyze its error.Theoretically,the proposed scheme can realize the time synchronization deviation at both ends of the line is no more than 20.8 microseconds,and the phase angle deviation at both sides is less than 0.5 degrees,which fully meets the requirements of current differential protection.

关 键 词：5G通信 配电网 电流差动保护 时间同步 B码 基站 

分 类 号：TM773[电气工程—电力系统及自动化] TN929.5[电子电信—通信与信息系统]