Electronic mutual inductor error characteristic on-line comparison and calibration device and method

Abstract

The invention provides an electronic mutual inductor error characteristic on-line comparison and calibration device. The device comprises an electronic mutual inductor module, an electromagnetic mutual inductor reference standard module, a standard mutual inductor module and a data acquisition module; one end of an isolating switch is connected with the electromagnetic mutual inductor reference standard module which is connected with the electronic mutual inductor module, and the other end is connected with the standard mutual inductor module; the data acquisition module is connected with the electronic mutual inductor module, the electromagnetic mutual inductor reference standard module, and the standard mutual inductor module. By means of the device and the method, the accuracy and reliability of electronic mutual inductor operation data on-line comparison and calibration are improved, and reliable data support is provided for reasonable and accurate estimation of electronic mutual inductor error characteristics.

Description

technical field [0001] The invention relates to the technology of intelligent equipment in electric power system, in particular to a device and method for online comparison and calibration of error characteristics of electronic transformers. Background technique [0002] The current electronic transformer is in the pilot application stage, and there is still a certain gap in its stability and reliability during operation compared with traditional electromagnetic transformers. [0003] At present, many provincial power companies have carried out relevant research in the field of online monitoring of electronic transformer error characteristics, such as application number: 201210429190.X, public date: 2012-10-31, name: optical and electromagnetic current transformer operating error real-time Comparison method and device, and application number: 201410183998.3, publication date: 2014-05-04, name: an online error analysis system for a digital electric energy metering device. ...

AI Technical Summary

Problems solved by technology

[0004] In the domestic patents that have been applied for, the online calibration (comparison) method of electronic transformers uses a set of electromagnetic transformers as a reference standard. Although the stability and reliability of electromagnetic transformers are high during operation, they are Only one set of electromagnetic transformers is used as a reference standard. If its own measurement characteristics are damaged by environmental changes or changed by transient interference in the test line, the measurement performance will be reduced. When using this operating data as a reference standard, It is difficult to accurately assess the operating performance of electronic transformers

[0005] Therefore, even if the reference standard failure is found and replaced through periodic inspection, all the operating data after the last weekly inspection is passed because the time of the standard failure cannot be accurately judged, which will waste a lot of time

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