Metering Clock Enhancement Technology and New Service Applications Based on 5G Timing

With the emergence of digital grid concept, the current metering system using PTP (Precise Time Protocol) clock synchronization technology cannot provide a unified device clock system across entire network, which affects two-way real-time control of new energy. And it is difficult to meet the clock for new business transactions synchronization accuracy requirements. Under the original metering clock system, a multi-source clock weighted fusion technology was proposed that used 5G communication modules as reference clocks, and used Kalman filtering to complete step-by-step clock correction at all levels of network nodes to achieve coordinated correction of different external reference clocks. The highest clock synchronization accuracy ensure the consistency of real-time data collection clock. Based on field test data collected by the Shenzhen Power Supply Bureau, the results showed that the electricity bill settlement after clock synchronization optimization processing is closer to field settlement.