High-precision time synchronization method and system applied to electric energy meter

• Main Authors: HAN XIAOJUN, XUE LEI, ZHOU XUAN, ZHOU JIEWEN, REN ZHIREN
• Format: Patent
• Language: English
• Published: 01.04.2015
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a high-precision time synchronization method and system applied to an electric energy meter. The high-precision time synchronization system includes a clock tester, a timing synchronization device and an electric energy meter. The time synchronization method comprises the following steps that: (1) the timing synchronization device reads system time T of the clock tester through a first communication interface; (2) the timing synchronization device writes the system time T to an electric energy meter to be subjected to time synchronization through a second communication interface; (3) the timing synchronization device reads system time T1 of the clock tester and system time T2 of the electric energy meter respectively through the first communication interface and the second communication interface; and (4) the difference value of T1 and T2 is obtained through comparison, if the difference value is smaller than a predetermined error threshold, time synchronization is successful, otherwise, the method returns to step (1). With the high-precision time synchronization method and system can ensure the reliability of the time of a terminal system to be subjected to time synchronization and ensure the accuracy of time synchronization.