Electricity meter clock correction method based on mean difference value

Abstract

The invention provides an electricity meter clock correction method based on a mean difference value, belonging to the field of time calibration. The method comprises the following steps: networking for an electricity meter group containing a target electricity meter, thereby obtaining an electricity meter timing network; periodically extracting an electricity meter error value in the electricitymeter timing network, and solving the mean difference value of all the electricity meter error values; acquiring a factory error mean of all electricity meter types in the electricity meter timing network, and obtaining a calibration mean in combination with the mean difference value; and broadcasting the calibration mean in the electricity meter timing network. In the method, the mean is solved based on the current errors of all the electricity meters in the network, and by taking the solved mean as calibration quantity, the electricity meters in the whole network are calibrated. Since a stepof extracting the electricity meter error values is triggered periodically, errors of the electricity meters in the whole network can be reduced effectively through multiple iterative operations, andthe electricity meters of the whole network are calibrated based on the reduced errors, thus, the electricity meters in the whole network can be in a state of having relatively less error, and accuracy of clocks in the electricity meters is improved effectively.

Description

technical field [0001] The invention belongs to the field of time calibration, in particular to a method for correcting an electric meter clock based on an average difference. Background technique [0002] The real-time clock (Real-Time Clock, RTC) plays an important role in the smart meter, which provides accurate time guarantee for remote centralized reading, fee control management, line loss detection and other services. According to the technical specifications of the smart energy meter of the State Grid Corporation of China, the clock accuracy is within ±0.5s / d, the error is less than 5ppm, and the daily timing error is less than 1s within the operating temperature range. If the error is greater than this value, the electricity data generated during the segmental billing of electric energy or the process of exceeding the standard will be inaccurate, and the resulting error may cause a large loss to the user or the power supply unit. [0003] The time synchronization me...

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