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

Abstract

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.

Description

technical field [0001] The present application relates to the technical field of instruments and meters, in particular to a high-precision time synchronization method and system applied to electric energy meters. Background technique [0002] In the prior art, with the popularization of tiered electricity prices, higher requirements are put forward for the clock accuracy of the electric energy meter. The absolute error of the calendar clock is not allowed to exceed 3 seconds, and the existing electric energy meter is produced and inspected. The time method generally uses computer time or network time as the basis. [0003] However, due to the low accuracy and real-time performance of the computer's built-in time, and it is easy to be manually modified, it is difficult to guarantee the reliability of the system time; the network of the production system generally uses the public network, due to network delays or network physical channels. It is difficult to ensure complete s...

AI Technical Summary

Problems solved by technology

[0003] However, because the time accuracy and real-time performance of the computer itself is not high, and it is easy to be manually modified, it is difficult to guarantee the reliability of the system time; the network of the production system generally uses the public network, due to network delays or network physical channels. It is difficult to ensure complete unblocking, so the network time is also difficult to guarantee the reliability of the production timing system

Due to the incomplete reliability of computer time and network time, the time inaccuracy of the production timing system is inaccurate, which often leads to batch errors in the production of electric meters, which seriously affects production efficiency. Therefore, an accurate and reliable electric energy meter timing system is imminent.

Images