基于GNSS的高可靠授时方法研究  

Research on High-Reliability Timing Method Based on GNSS

作　　者：张晗 黄艳 张磊 谷扬 ZHANG Han;HUANG Yan;ZHANG Lei;GU Yang(Beijing Institute of Metrology,Beijing 100029,China)

机构地区：[1]北京市计量检测科学研究院,北京100029

出　　处：《计量科学与技术》2025年第2期37-44,共8页Metrology Science and Technology

基　　金：北京市科委科技服务业促进专项(Z201100008520022)。

摘　　要：为了提高电力系统时间传递的准确性、稳定性和实时性,提出了一种基于GNSS(Global Navigation Satellite System,全球导航卫星系统)的高可靠电力系统授时方法,可支持对本地电力系统铷钟的三种授时模式,即北京市计量检测科学研究院保持的原子时标远程授时、GNSS系统授时和铷原子钟频率预测修正,确保在时间传递标准或传递链路正常时、有故障时以及所有通信手段都中断的特殊时期,电力系统时钟均可溯源到国家时间基准UTC(NIM)。在三种授时模式下分别进行数据比对实验,实验结果表明,三种模式下的标准偏差和时间稳定度均达到并优于与UTC(NIM)实现同步的预期目标。To improve the accuracy,stability,and real-time performance of time transfer in power systems,this paper proposes a high-reliability power system timing method based on GNSS(Global Navigation Satellite System).This method supports three timing modes for local rubidium clocks in power systems:remote timing from the atomic time standard maintained by Beijing Institute of Metrology,GNSS system timing,and rubidium atomic clock frequency prediction correction.These modes ensure that power system clocks remain traceable to the national time reference UTC(NIM)during normal operation of time transfer standards or transfer links,during fault conditions,and during special periods when all communication means are interrupted.Comparative data experiments were conducted under all three timing modes.Results demonstrate that the standard deviations and time stability achieved in all three modes meet and exceed the expected synchronization targets with UTC(NIM).

关 键 词：计量学 时间频率 电力系统 卫星共视法 量值传递 

分 类 号：TB973[一般工业技术—计量学]