A traceability method and system for an electronic transformer calibrator

Abstract

The invention provides an electronic transformer calibrator traceability method and system. The method comprises the following steps: a digital multimeter collects analog signals and converts the analog signals into a digital message; an upper computer carries out virtual reconstruction on the digital messages and then carries out error information superposition to form a reconstructed message; a message controller carries out timing control according to the reconstructed message; a tested electronic transformer calibrator collects the analog signals and the reconstructed message sent by the message controller and generates error information; and a comparison is made between the error information generated by the tested electronic transformer calibrator and the error information superposed by the upper computer to obtain test errors. The sample data of the digital multimeter is subjected to virtual reconstruction to enable the output digital message to be same with the message output by an actual electronic transformer merging unit, and by comparing the error information generated by the tested electronic transformer calibrator and the error information superposed by the upper computer, the test errorsof the tested electronic transformer calibrator is obtained; and therefore, full traceability work is finished.

Description

technical field [0001] The invention relates to the field of traceability testing of an electronic transformer calibrator, in particular to a traceability method and system for an electronic transformer calibrator. Background technique [0002] With the rapid promotion of digital substations and smart substations, digital metering equipment such as electronic transformers, merging units, and digital energy meters have been widely used in power systems. At present, there are mature electronic transformer calibrator products on the market, which mainly test some technical indicators related to measurement accuracy such as angle difference, ratio difference and time characteristics of electronic transformers. [0003] At present, the traceability of domestic electronic transformer calibrator is mainly a kind of calibration work, and the traditional transformer calibrator inspection device adjusts and outputs two sets of analog signals carrying error information, one of which is...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a traceability method and system for an electronic transformer calibrator to solve the technical problem of low calibration accuracy of the electronic transformer calibrator in the prior art

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