A Verification and Traceability Method of Digital Energy Meter Based on Standard Digital Power Source

Abstract

The present invention discloses a digitization electric energy meter detection and traceablility method based on a standard digital power source. According to opinions that a standard digitization electric energy meter only can perform numerical value traceablility and does not has physical quantity traceablility and a theoretical value is namely a true value, an output mode is provided that a composite function obtained through addition of Fourier series in a trigonometric function mode and a random function is taken as a standard digital power source. In a given power theoretical value condition, appropriate value precision and parameters of the random function are determined according to the expected accuracy level of the detected digitization electric energy meter to configured the standard digital power source, obtain the voltage and current discretization data with given precision and send the voltage and current discretization data to a detected table; and the actual accuracy level of the detected table is determined through assessment of the uncertainty between the measurement result of the detected table and the theoretical value. The digitization electric energy meter detection and traceablility method based on the standard digital power source realizes detection and traceablility of the digitization electric energy meter.

Description

technical field [0001] The invention relates to the technical field of verification of digital electric energy meters, in particular to a digital electric energy meter verification and traceability method based on a standard digital power source. Background technique [0002] The digital watt-hour meter is a metering device applied to digital smart substations. Different from the traditional analog watt-hour meter, its input signal is a digital message that conforms to the IEC61850 standard. Therefore, the traceability and verification methods of digital energy meters are different from traditional energy meters. At present, for the traceability of the value of the digital electric energy meter, people refer to the traceability method of the analog electric energy meter for corresponding copying. In fact, the output of the A / D conversion process is a digital quantity without a unit, so there is no traceability problem after the A / D conversion. Therefore, the traceability o...

AI Technical Summary

Problems solved by technology

In fact, there is always error transmission in the entire metering system, such as noise generated by analog circuits, harmonics and truncation errors in the power system will be converted into digital quantities and transmitted to digital energy meters, thereby affecting the accuracy of energy metering

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