摘要
随着我国电力科技的不断发展,很多电力系统机构使用的时间频率标准,需要获得更高精度的时间标准源进行时间频率比对来保持原子钟的准确运行,因而对其进行远程校准、时间频率量值溯源同步和实效提出了要求。针对上述问题,通过分析电力系统对时间频率量值需求和研究技术现状,提出了基于导航卫星共视的GNSS时间频率传递方法,解决了时钟远程校准的问题;设计了可及时溯源到国家时间频率基准的电力系统远程时间频率溯源体系,明确了依据时间频率传递方法的具体实施方案和数据处理过程。通过对时间频率标准装置与国家基准UTC(NIM)共视数据的分析,研究结果表明时刻偏差绝对值(1天平均)不大于10 ns,解决了溯源的同步性和时效性的问题。
The time and frequency standards used by many power system organizations need to obtain a higher precision time standard source for time and frequency comparison to maintain the accurate operation of atomic clocks,thus putting forward requirements for their remote calibration,synchronization of time and frequency magnitude traceability,and effectiveness.Given the above problems,the GNSS time and frequency transfer method based on the common view of navigation satellites is proposed to solve the problem of remote calibration of clocks by analyzing the demand for time and frequency measurements in power systems and the current status of research technology;a remote time and frequency traceability system for power systems that can be timely traced to the national time and frequency reference is designed,and the specific implementation plan and data processing process based on the time and frequency transfer method are clarified.Through the analysis of the time and frequency standard device and the national benchmark UTC(NIM)co-view data,the research results show that the absolute value of the deviation(1-day)is no more than 10 ns,which solves the problem of synchronization and timeliness of traceability.
作者
赵莎
卢达
孟静
宋晓卉
ZHAO Sha;LU Da;MENG Jing;SONG Xiaohui(China Electric Power Research Institute,Beijing 100192,China)
出处
《计量科学与技术》
2021年第4期14-18,共5页
Metrology Science and Technology
基金
国家重点研发计划(2017YFF0212001)。
关键词
GNSS时间频率传递
卫星共视
远程校准
实时驯服
时刻偏差
时间标准偏差
GNSS time and frequency transfer
common view
remote calibration
real-time tame
time deviation
standard deviation of time
