Method for automatically correcting clock differentiation of electric energy meter

Abstract

The invention discloses a method for automatically correcting clock differentiation of an electric energy meter. The method comprises the following steps that a metering automation master station carries out online automatic measurement on an electric energy meter clock; the electric energy meter clock is compared with a reference clock when the metering automation master station issues an instruction, and comprehensive troubleshooting is carried out on the electric energy meter with an abnormal field clock by combining an 'electric energy meter clock abnormality' event record uploaded by a field terminal acquired by the metering automation master station; the metering automation master station performs clock deviation judgment on the electric energy meter with the abnormal field clock according to the clock deviation range of the electric energy meters, and automatically corrects the electric energy meter with the abnormal field clock in a remote broadcast time synchronization or point-to-point time synchronization mode; and the metering automation master station judges whether the electric energy meter with the field clock difference are successful in time synchronization, performs time synchronization clock statistics and shows details in the system. According to the embodiment of the invention, the method can achieve automatic online correction of the clock of the electricenergy meter.

Description

technical field [0001] The invention relates to the electric power technical field of clock correction of an electric energy meter, in particular to a method for automatic correction of clock differentiation of an electric energy meter. Background technique [0002] With the continuous deepening of metering automation technology and the application of electric energy data, the accuracy of the hourly, daily, and monthly frozen indications of the electric energy meter collected by the master station of the metering automation system is highly dependent on the clock accuracy of the electric energy meter and the collection terminal, and the clock deviation will be It may cause errors in the frozen reading of the metering automation system; and the abnormal clock of the smart energy meter not only affects the effective control of the success rate of electric energy data collection and line loss rate, but also easily causes complaints from electricity customers. Due to the quality...

AI Technical Summary

Problems solved by technology

[0002] With the continuous deepening of metering automation technology and the application of electric energy data, the accuracy of the hourly, daily, and monthly frozen indications of the electric energy meter collected by the master station of the metering automation system is highly dependent on the clock accuracy of the electric energy meter and the collection terminal, and the clock deviation will be It may cause errors in the frozen reading of the metering automation system; and the abnormal clock of the smart energy meter not only affects the effective control of the success rate of electric energy data collection and the line loss rate, but also easily causes complaints from electricity customers

Due to the quality problem of the clock battery of the smart energy meter, the clock deviation during verification, and the clock crystal oscillator being damaged by external force during transportation, etc., some of the energy meters operating on site have clock drift, resulting in inaccurate time and wrong time period.

The master station of the traditional metering automation system checks the clock of the electric energy meter, mainly adopting the method that the main station first synchronizes the time of the collection terminal, and then the terminal broadcasts the time to the electric energy meter. Since the terminal broadcasts the time to the electric energy meter, it takes 5 minutes The upper limit of the clock deviation, if it exceeds 5 minutes, the time synchronization cannot be successful, and the broadcast time synchronization is an instruction that does not need to be answered, so it is difficult to accurately grasp the time synchronization results and the clock status of the field equipment

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