Time synchronization method of intelligent electric energy meter

Abstract

The invention discloses a time synchronization method of an intelligent electric energy meter. The time synchronization method comprises the following steps: acquiring a current clock in a clock chip and a backup clock after time synchronization in advance; judging whether the current clock and the backup clock have faults or not, and marking a clock fault mark according to a judgment result; when the current clock breaks down and the backup clock does not break down, judging the sequence of the current moment of the current clock and the current backup moment of the backup clock; when the current moment is earlier than the backup moment, covering the current moment by using the backup moment, and recovering the clock fault mark to be in an empty state; and when the current moment is not earlier than the backup moment, generating and sending an alarm signal to a metering automation system master station of the intelligent electric energy meter. Through judgment and comparison of double data of the backup clock and the current clock, time synchronization of the clock is completed, the abnormal clock is recovered, and the time synchronization success rate and the time synchronization precision are high.

Description

technical field [0001] The invention relates to the technical field of metering automation, in particular to a time synchronization method for an intelligent electric energy meter. Background technique [0002] The power consumption information of power users is collected by the smart energy meter of the power collection system, and reported to the master station of the metering automation system for data processing, analysis and real-time monitoring. With the comprehensive promotion and application of the metering automation system, the accuracy of user data collection and real-time Sexuality has become the focus of power companies. The accuracy and stability of the smart energy meter clock at the metering terminal directly affects the accuracy of user power data collection and line loss analysis in the station area, and becomes a decisive factor in determining whether user billing is correct or not. [0003] The time synchronization methods in the prior art mainly include...

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Problems solved by technology

[0003] The time synchronization methods in the prior art mainly include: using the background of the system master station to regularly perform point-to-point time synchronization on the terminal, utilizing the front desk of the system master station to perform point-to-point time synchronization or broadcast time synchronization on the terminal, or using on-site manual handheld time synchronization; The success rate and timing accuracy of existing time synchronization methods are not high

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