Smart Meter Timing And Calibration Technology

The operation of modern power grid systems relies on a unified timestamp between devices. The accuracy of device timestamps directly affects the logical order of data sequences and the reliability of backend analysis, which is especially true in the design of single phase smart energy meter.

In the smart wifi energy meter architecture, a local clock continuously tracks time information, while various external time sources (such as network time protocol servers or global navigation satellite systems) periodically send time calibration signals to terminal devices. If clock drift occurs, the internal timers are continuously adjusted by receiving data from a standard time source to maintain consistency with the operating system.

The device's time management system typically combines a local, highly stable crystal oscillator with an external synchronization signal. The crystal oscillator provides an initial frequency reference, while the external time source performs periodic comparison corrections to reduce deviations caused by factors such as temperature changes and crystal aging.