On-site steady-state accuracy verification system for electronic current transformer and verification method thereof

Abstract

The invention provides an on-site steady-state accuracy verification system for an electronic current transformer and a verification method thereof. The method comprises the following steps: a, the electronic current transformer is connected with a standard current transformer in series, and primary testing current is applied to the standard current transformer and a to-be-tested electronic current transformer through a current riser; b, a secondary current signal of the standard current transformer becomes digital quantity after analog-to-digital conversion, and then the digital quantity is transmitted to an analysis processing unit of the on-site steady-state accuracy verification system for the electronic current transformer; c, the digital quantity output by the electronic current transformer is connected with the mainframe of the on-site steady-state accuracy verification system for the electronic current transformer through an Ethernet cable after photoelectric conversion; and d, the analysis processing unit performs analysis processing to the digital quantity of the standard voltage signal collected by the on-site steady-state accuracy verification system for the electronic current transformer and the digital quantity output by the electronic current transformer to obtain the verification value of the to-be-tested article. The method can realize the on-site steady state verification of the electronic current transformer and has the advantages of high verification accuracy, high speed and high efficiency.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to an on-site steady-state accuracy verification system of an electronic current transformer and a verification method thereof. Background technique [0002] Before the electronic current transformer is installed and put into operation, the on-site steady-state accuracy verification is generally carried out. When the preventive test or maintenance is carried out after several years of operation, the steady-state accuracy verification is usually also carried out. [0003] The output of the traditional current transformer is an analog signal, and its steady-state verification system performs the verification between the analog quantity and the analog quantity. The output of the electronic current transformer is a digital signal, and it is necessary to check the digital quantity and the analog quantity during the on-site steady-state calibration. Due to the major changes in the p...

AI Technical Summary

Problems solved by technology

Due to the major changes in the principle and output mode of electronic current transformers and traditional transformers, the existing calibration methods for traditional current transformers cannot be used on electronic current transformers.

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