In electric power time synchronization networks, cesium atomic clocks and rubidium atomic clocks provide high-precision time references for regional grid management centers and large power plants. Since 2004, time synchronization systems have been integrated into China's power grid, primarily applied in power plants, substations, and dispatch centers, ensuring the safe and stable operation of the grid.

        In 2008, State Grid Corporation of China issued the "Typical Design of Transmission and Substation Projects - Secondary Systems of Substations" standard, requiring 500kV and 220kV substations to be equipped with time synchronization systems. In recent years, State Grid has also proposed plans to build a robust smart grid, aiming to achieve a unified "Smart Grid" by 2020. Time synchronization in the power grid is foundational and essential for achieving information synchronization in the smart grid.

        In September 2009, China formally established the "Dual Backup, BeiDou-oriented Power Timing System" to reduce reliance on GPS timing. With the comprehensive deployment and construction of the BeiDou timing system in China, the demand for time and frequency products in the power system continues to grow rapidly.