Application of Remote Calibration of Time and Frequency in Power System

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.