Electric energy meter clock checkout method

Abstract

The invention discloses an electric energy meter clock checkout method. A district concentrator issues an encrypted broadcast clock checkout command message to an electric energy meter, a clock checkout command is decrypted after the electric energy meter receives the broadcast clock checkout command message, and the decrypted clock checkout command comprises a clock checkout command serial numberand clock checkout time. After the encrypted broadcast clock checkout mode is adopted, the clock checkout speed and the clock checkout success rate of the electric energy meter can be greatly increased, replay attack caused by illegal interception of the clock checkout message can be effectively prevented, a clock of the electric energy meter is prevented from being illegally adjusted, and safetyof the clock is ensured.

Description

technical field [0001] The invention relates to a clock correction method, in particular to a clock correction method of an electric energy meter. Background technique [0002] At present, there are mainly two methods for timing calibration of electric energy meters: [0003] 1. Explanation of the broadcast time calibration method: the clock is synchronized through the broadcast time calibration command of the energy meter, that is, the terminal sends a broadcast time calibration command to the energy meter to which it belongs. After the energy meter receives the broadcast time calibration command, if the deviation is within 5 minutes, then Update the clock of the electric energy meter. In order to ensure that the clock is not adjusted arbitrarily, only one adjustment is allowed per day. [0004] Defects of the broadcast time calibration method: In order to ensure the safety of the clock of the electric energy meter, the broadcast time can only be corrected for the electr...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a kind of electric energy meter that can be corrected at any time, the correction method is simple, the correction efficiency is high, the clock management problem of the electric energy meter is solved, and the manufacturing cost of the electric energy meter is reduced. Watch Clock Correction Method

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