Method for calibrating atom time scale of user electric energy meter

Abstract

The invention relates to a method for calibrating an atomic time scale of a user electric energy meter. The method comprises the steps of building a detection platform, calibrating the time scale and completing output of measurement data. According to the method, a satellite is used as an intermediate medium by using a substitution method, time marks of internal atomic clocks of third-party departments, power grid detection units and users at different positions at the same moment are measured, clock correction is obtained through calculation, and the internal atomic clocks tend to be displayed on a reference table of the third-party departments through display adjustment. And finally, an accurate measurement result can be obtained through repeated comparison. According to the method and the device, doubts of the detected meter user on the detection result are eliminated, the standard meter can be calibrated timely and accurately in the detection process, and the meter using rights and interests of the user are further protected.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meter measurement, and in particular to a method for calibrating an atomic time scale of a user's electric energy meter. Background Art

[0002] The accuracy of the energy meter is related to the actual power consumption of the power user. The error needs to be calibrated by the power grid detection unit. Figure 1 The power grid detection unit where the inventor works needs to connect a standard electric energy meter (called the standard meter) in parallel with the user's electric energy meter (called the meter under test) during calibration, sample the current and voltage output by the three-phase precision measurement power source under the same conditions, and control and output the measurement results through a microcomputer to determine the error; but the problem that still exists in this model is how to prove that the standard electric energy meter is accurate, so a third-party department needs to supervise it. At present, electric energy meters are becoming more intelligent with the development of computer technology. With the development of network transmission speed, the time scale is generated by the internal atomic clock of the electric energy meter. When the above test needs to be performed through the network, the time scale needs to be calibrated first, and then accurate output parameters are obtained to obtain accurate measurement results. Therefore, the calibration method of the time scale is involved in the present invention. Summary of the invention

[0003] In view of the defects mentioned in the background technology, the present invention provides a method for calibrating the atomic time scale of a user's electric energy meter, and its technical solution is as follows: The method for calibrating the atomic time scale of a user's electric energy meter comprises the following steps: S1. Build a detection platform: Build an electric energy meter detection platform in the power grid detection unit, the electric energy meter detection platform includes a three-phase precision measurement power source, the three-phase precision measurement power source is connected to the detection chamber and inputs a signal source, the detection chamber includes a standard meter and one or more user's detected meters connected in parallel, and the detection chamber is connected to a microcomputer and collects output signals of the standard meter and the detected meter, the microcomputer is connected to the three-phase precision measurement power source and controls the output signal of the three-phase precision measurement power source, and at the same time, the microcomputer remotely receives the signal of the reference meter of the third-party department via a satellite; S2. Time scale calibration: When the installation is ready, start the detection platform. After the microcomputer collects the signal of the reference meter of the third-party department, it also collects the signal of the three-phase precision measurement power source and the detection chamber. The signal is digital information, which is read and displayed by the microcomputer, including remote time and frequency parameters, which need to be calibrated to ensure the accuracy of the measurement results. S3. Complete the output of measurement data.

[0004] In the above step S2, the comparison of the remote time frequency is achieved through the substitution method, which is used to calibrate the time scale of the internal atomic clock of the power grid detection unit and the user's electric energy meter, and find out the clock difference between the detection platform and the reference meter of the third-party department. The substitution method is: suppose the clock display of the atomic clock inside the detection platform is X1, the clock display of the satellite is X, the clock display of the reference meter of the third-party department is X2, and the clock difference is △; the clock difference between the atomic clock inside the detection platform and the satellite clock is calculated as △1=X1-X, and the clock difference between the clock of the reference meter of the third-party department and the satellite clock is calculated as △2=X2-X. Finally, the clock difference between the atomic clock inside the detection platform and the clock of the reference meter of the third-party department is calculated as △=△2-△1=X2-X-(X1-X)=X2-X1.

[0005] In the above step S1, the third-party department is the China Institute of Metrology, and the reference meter is the three-phase multifunctional standard meter RD-33; The standard meter is a three-phase electric energy meter standard device; The meter under test is a single-phase standard electric energy meter or a three-phase standard electric energy meter.

[0006] Beneficial effects of implementing the present invention: The present invention uses a substitution method to use satellites as an intermediate medium to measure the time scales of the internal atomic clocks of third-party departments, power grid detection units and users at different locations at the same time, and obtains the clock error through calculation. After adjusting the display of the internal atomic clock to make it tend to the display of the third-party department's reference table, accurate measurement results can be obtained through repeated comparison. The present invention eliminates the doubts of the user of the meter being tested about the test results, and can timely and accurately calibrate the standard meter during the test process, thereby protecting the user's rights and interests in using the meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0008] Figure 1 : Schematic diagram of the structure when the standard meter and the meter under test are tested; Figure 2 : Schematic diagram of building a detection platform in step S1; Figure 3 : A schematic diagram of the equipment involved in the comparison method of step S2. DETAILED DESCRIPTION

[0009] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0010] In one embodiment of the present invention, please refer to the attached Figure 1-3 shown.

[0011] A method for calibrating an atomic time scale of a user's electric energy meter comprises the following steps: S1. Build a detection platform: Build an electric energy meter detection platform in the power grid detection unit, the electric energy meter detection platform includes a three-phase precision measurement power source, the three-phase precision measurement power source is connected to the detection chamber and inputs a signal source, the detection chamber includes a standard meter and one or more user's detected meters connected in parallel, and the detection chamber is connected to a microcomputer and collects output signals of the standard meter and the detected meter, the microcomputer is connected to the three-phase precision measurement power source and controls the output signal of the three-phase precision measurement power source, and at the same time, the microcomputer remotely receives the signal of the reference meter of the third-party department via a satellite; S2, time scale calibration: when the installation is ready, the detection platform is started, and after the microcomputer collects the signal of the reference meter where the third-party department is located, the signal of the three-phase precision measurement power source and the detection chamber is collected at the same time. The signal is digital information, which is read and displayed by the microcomputer, including remote time frequency parameters, which need to be calibrated to ensure the accuracy of the measurement result; the comparison of the remote time frequency is realized by the substitution method, which is used to calibrate the time scale of the internal atomic clock of the power grid detection unit and the user's electric energy meter, and find the clock difference between the detection platform and the reference meter where the third-party department is located. The substitution method is: suppose the clock display of the atomic clock inside the detection platform is X1, the clock display of the satellite is X, the clock display of the reference meter where the third-party department is located is X2, and the clock difference is △; calculate the clock difference between the atomic clock inside the detection platform and the satellite clock as △1=X1-X, calculate the clock difference between the clock of the reference meter where the third-party department is located and the clock of the satellite as △2=X2-X, and finally calculate the clock difference between the atomic clock inside the detection platform and the clock of the reference meter where the third-party department is located as △=△2-△1=X2-X-(X1-X)=X2-X1; S3. Complete the output of measurement data.

[0012] In the above step S1, the third-party department is the Chinese Academy of Metrology, the reference meter is the three-phase multifunctional standard meter RD-33; the standard meter is a three-phase electric energy meter standard device; and the meter under test is a single-phase standard electric energy meter or a three-phase standard electric energy meter.

[0013] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for calibrating an atomic time scale of a user's electric energy meter, characterized in that: The following steps are involved: S1. Build a detection platform: Build an electric energy meter detection platform in the power grid detection unit, the electric energy meter detection platform includes a three-phase precision measurement power source, the three-phase precision measurement power source is connected to the detection chamber and inputs a signal source, the detection chamber includes a standard meter and one or more user's detected meters connected in parallel, and the detection chamber is connected to a microcomputer and collects output signals of the standard meter and the detected meter, the microcomputer is connected to the three-phase precision measurement power source and controls the output signal of the three-phase precision measurement power source, and at the same time, the microcomputer remotely receives the signal of the reference meter of the third-party department via a satellite; S2. Time scale calibration: When the installation is ready, start the detection platform. After the microcomputer collects the signal of the reference meter of the third-party department, it also collects the signal of the three-phase precision measurement power source and the detection chamber. The signal is digital information, which is read and displayed by the microcomputer, including remote time and frequency parameters, which need to be calibrated to ensure the accuracy of the measurement results. S3. Complete the output of measurement data.

2. A method for calibrating an atomic time scale of a user's electric energy meter according to claim 1, characterized in that: The remote time frequency comparison is achieved through a substitution method, which is used to calibrate the time scale of the internal atomic clock of the power grid detection unit and the user's electric energy meter, and find out the clock difference between the detection platform and the reference meter of the third-party department. The substitution method is: suppose the clock display of the internal atomic clock of the detection platform is X1, the clock display of the satellite is X, the clock display of the reference meter of the third-party department is X2, and the clock difference is △; the clock difference between the internal atomic clock of the detection platform and the satellite clock is calculated as △1=X1-X, and the clock difference between the clock of the reference meter of the third-party department and the satellite clock is calculated as △2=X2-X. Finally, the clock difference between the internal atomic clock of the detection platform and the clock of the reference meter of the third-party department is calculated as △=△2-△1=X2-X-(X1-X)=X2-X1.

3. A method for calibrating the atomic time scale of a user's electric energy meter according to claim 2, characterized in that: The third-party department is the Chinese Academy of Metrology, and the reference meter is the three-phase multi-functional standard meter RD-33.

4. A method for calibrating an atomic time scale of a user's electric energy meter according to claim 2, characterized in that: The standard meter is a three-phase electric energy meter standard device.

5. A method for calibrating the atomic time scale of a user's electric energy meter according to claim 2, characterized in that: The meter under test is a single-phase standard electric energy meter or a three-phase standard electric energy meter.

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