Live verification method of current transformer

A technology of current transformer and calibration method, which is applied in the direction of instruments, measuring electric variables, measuring devices, etc., can solve problems such as inability to calibrate current transformers, inability to detect live current transformers, etc., and achieve the effect of improving reliability

Active Publication Date: 2016-10-26
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, this method can only be carried out in a power failure or offline state, and it cannot perform live detection on the current transformer, especially the verification of the current transformer after live replacement.

Method used

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  • Live verification method of current transformer
  • Live verification method of current transformer
  • Live verification method of current transformer

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Embodiment Construction

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] A live calibration method for a current transformer provided by an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0037] figure 1 It is a schematic diagram of the implementation process of a charging verification method for a current transformer in an embodime...

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Abstract

The invention provides a live verification method of a current transformer. The method comprises a step of shielding the magnetic field generated by the current which goes through a primary side conductor in a current transformer to be detected, a step of introducing current into the current transformer to be detected, a step of detecting the real value of verification current, and a step of calculating the measurement error of the current transformer to be detected. Compared with the prior art, the live verification method and system of a current transformer provided by the invention have the advantages that the interference of a verification result by the current in the primary side conductor is eliminated by the shielding layer, the reliability of verification is improved, and the live detection of the current transformer to be detected is realized at the same time.

Description

technical field [0001] The invention relates to the technical field of current transformer calibration, in particular to a live calibration method of a current transformer. Background technique [0002] In the lines of power generation, power transformation, power transmission, power distribution and power consumption, the current size varies greatly, ranging from a few amps to tens of thousands of amps. In order to facilitate measurement, protection and control, it needs to be converted into a relatively uniform current. In addition, the voltage on the line is generally relatively high, such as direct measurement is very dangerous. The current transformer plays the role of current conversion and electrical isolation. It is a sensor for secondary equipment such as measuring instruments and relay protection in the power system to obtain electrical primary circuit current information. The current transformer converts high current into low current in proportion. The primary si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 邓占锋陈硕牛晓晨刘占元侯继彪郑天祥李璐孙海江李春城
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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