Clock synchronization scheme based on satellite time transfer in Power User Electric Energy Data Acquisition System

摘要

In Power User Electric Energy Data Acquisition System, a deadly drift may be generated and accumulated by the differences between devices and environments every day. Therefore an effective external timing system is imperative for clock synchronization. Based on Beidou and GPS satellite, a multimedia timing device and broadcast algorithm are designed. The algorithm mainly including frequently broadcasting Synchronous frame to calibrate clock frequency and relatively infrequently replying response frame to measure the average delay. And experiments show that the synchronization is always better than 1ms with our scheme.