CN-121978878-A - Method and device for automatically calibrating electric energy meter clock in station area by system, system terminal and metering box

CN121978878ACN 121978878 ACN121978878 ACN 121978878ACN-121978878-A

Abstract

The application discloses a method, a device, a system terminal and a metering box for automatically calibrating a station electric energy meter clock by a system, and relates to the technical field of clock calibration, comprising the steps of inquiring a time setting information set recorded by the electric energy meter of the station; and calculating clock errors of the electric energy meter at all temperature points according to the time setting information group, and carrying out clock calibration on the electric energy meter based on the clock errors. Through system time acquisition, then according to the logic of temperature calculation target clock error, can accurate match the true clock deviation under different temperatures, avoid the excessive, not enough problem of calibration under the high temperature of low temperature calibration, can effectively improve the accuracy of electric energy meter clock, reduce the error accumulation because of temperature variation leads to. Through systematic data processing and analysis, the calibration flow is further optimized, and the overall efficiency is improved.

Inventors

LIAO ZIGUI
ZOU KESHU
LIU JIANHUI

Assignees

深圳市科陆电子科技股份有限公司
科陆国际技术有限公司

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. The method for automatically calibrating the electric energy meter clock of the station area by the system is characterized by comprising the following steps of: inquiring a time setting information group recorded by an electric energy meter of the station area; Calculating clock errors of the electric energy meter at all temperature points according to the time setting information group; And performing clock calibration on the electric energy meter based on the clock error.
2. The method of claim 1, wherein the step of clock calibrating the power meter based on the clock error comprises: obtaining a plurality of clock error values of a plurality of electric energy meters at the same temperature point based on the clock error; Calculating average clock errors of the plurality of electric energy meters at all temperature points according to the clock error values of the plurality of electric energy meters at the same temperature point; and performing clock calibration on the electric energy meter based on the average clock error.
3. The method of claim 2, wherein the step of clock calibrating the power meter based on the average clock error comprises: calculating a target error compensation coefficient based on a preset number of average clock errors and temperature points of the average clock errors; Calculating the theoretical clock error of the electric energy meter corresponding to each temperature through the target error compensation coefficient; Clock error compensation is carried out on the electric energy meters with different temperatures through the target error compensation coefficient, and electric energy meter compensation error values after clock error compensation of the electric energy meters at all temperature points are collected; and carrying out clock calibration on the electric energy meter according to the electric energy meter compensation error value and the electric energy meter theoretical clock error corresponding to each temperature.
4. The method of claim 3, wherein the step of clock calibrating the power meter based on the power meter compensation error value and the power meter theoretical clock error for each temperature comprises: Comparing the compensation error value of the electric energy meter with a set error value; Calculating an electric energy meter correction error value according to the electric energy meter theoretical clock error corresponding to each temperature and the electric energy meter compensation error value under the condition that the electric energy meter compensation error value is larger than the set error value; and modifying the theoretical clock error of the electric energy meter according to the correction error value of the electric energy meter so as to finish clock calibration of the electric energy meter.
5. The method of claim 4, wherein the method further comprises: Updating the target error compensation coefficient according to the correction error value of the electric energy meter to obtain an updated target error compensation coefficient; And returning the step of performing clock error compensation on the electric energy meters with different temperatures through the target error compensation coefficient based on the updated target error compensation coefficient, and collecting electric energy meter compensation error values of the electric energy meters with different temperature points after performing clock error compensation until the electric energy meter compensation error values are smaller than the set error values, thereby completing clock calibration on the electric energy meters.
6. The method of claim 1, wherein the step of calculating a clock error of the power meter at each temperature point based on the set of time-versus-time information comprises: analyzing the time setting information group to obtain the system sending time and the electric energy meter receiving time of each temperature point; and calculating clock errors of the electric energy meter at all temperature points according to the system sending time and the electric energy meter receiving time.
7. The method according to any one of claims 1 to 6, wherein the step of querying the set of time tick information recorded by the electric energy meter of the zone comprises: The method comprises the steps that system time information is sent to electric energy meters in a platform area at intervals of a preset period, so that when the electric energy meters receive the system time information, the electric energy meter receiving time information and the current temperature of the electric energy meters are automatically collected, and the electric energy meter receiving time information, the current temperature of the electric energy meters and the system time information are summarized into a time setting information group and recorded; and under the condition that the preset condition is met, sequentially inquiring the time setting information groups recorded by the electric energy meters of the station area according to the sending time length.
8. A system auto-calibration station electric energy meter clock device, the device comprising: the inquiring module is used for inquiring the time setting information group recorded by the electric energy meter of the station area; The calculating module is used for calculating clock errors of the electric energy meter at all temperature points according to the time setting information group; and the calibration module is used for carrying out clock calibration on the electric energy meter based on the clock error.
9. A system terminal comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program being configured to implement the steps of the method for automatically calibrating a site power meter clock for a system as claimed in any one of claims 1 to 7.
10. A metering box, characterized in that the metering box is connected to a system terminal, the system terminal is stored with a computer program, and the computer program realizes the steps of the method for automatically calibrating the electric energy meter clock of the station area by the system according to any one of claims 1 to 7 when being executed by a processor.

Description

Method and device for automatically calibrating electric energy meter clock in station area by system, system terminal and metering box Technical Field The application relates to the technical field of clock calibration, in particular to a method, a device, a system terminal and a metering box for automatically calibrating a station electric energy meter clock by a system. Background With the deep promotion of smart power grid construction, the electric energy meter is used as key equipment for metering and data acquisition in the electric power system, the clock precision directly influences the accuracy of time stamps of various data recorded by the electric energy meter, and further influences core services such as time-sharing charging, line loss calculation and other operation analysis of the electric power system. The traditional electric energy meter clock high-precision calibration is used for temperature error compensation through four characteristic function relations of comprehensive clock error and temperature, wherein a specific compensation value is a measurement average value, namely a system terminal controls the electric energy meter to uniformly use a fixed coefficient value, personalized adjustment cannot be carried out according to the actual running environment of each electric energy meter, and large difference exists in the compensation effect of the clock error under different temperature conditions. The traditional calibration method adopts a fixed coefficient temperature compensation method or periodic broadcast timing, has large calibration error and large time difference among different individuals, and can not solve the problem of data synchronization of a large-scale electric energy meter cluster. Disclosure of Invention The application mainly aims to provide a method, a device, a system terminal and a metering box for automatically calibrating a station electric energy meter clock by a system, and aims to solve the technical problem of larger calibration error of the existing electric energy meter. In order to achieve the above purpose, the present application provides a method for automatically calibrating a clock of a district electric energy meter by a system, the method for automatically calibrating the clock of the district electric energy meter by the system comprises: inquiring a time setting information group recorded by an electric energy meter of the station area; Calculating clock errors of the electric energy meter at all temperature points according to the time setting information group; And performing clock calibration on the electric energy meter based on the clock error. In one embodiment, the step of clock calibrating the electric energy meter based on the clock error includes: obtaining a plurality of clock error values of a plurality of electric energy meters at the same temperature point based on the clock error; Calculating average clock errors of the plurality of electric energy meters at all temperature points according to the clock error values of the plurality of electric energy meters at the same temperature point; and performing clock calibration on the electric energy meter based on the average clock error. In one embodiment, the step of clock calibrating the electric energy meter based on the average clock error includes: calculating a target error compensation coefficient based on a preset number of average clock errors and temperature points of the average clock errors; Calculating the theoretical clock error of the electric energy meter corresponding to each temperature through the target error compensation coefficient; Clock error compensation is carried out on the electric energy meters with different temperatures through the target error compensation coefficient, and electric energy meter compensation error values after clock error compensation of the electric energy meters at all temperature points are collected; and carrying out clock calibration on the electric energy meter according to the electric energy meter compensation error value and the electric energy meter theoretical clock error corresponding to each temperature. In an embodiment, the step of performing clock calibration on the electric energy meter according to the electric energy meter compensation error value and the electric energy meter theoretical clock error corresponding to each temperature includes: Comparing the compensation error value of the electric energy meter with a set error value; Calculating an electric energy meter correction error value according to the electric energy meter theoretical clock error corresponding to each temperature and the electric energy meter compensation error value under the condition that the electric energy meter compensation error value is larger than the set error value; and modifying the theoretical clock error of the electric energy meter according to the correction error value of the electric energy meter so as to finish clock cal