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Rogowski coil and electronic current transformer applying Rogowski coil

A technology of current transformers and Rogowski coils, applied in inductors, voltage/current isolation, coils, etc., can solve the problems of increasing the error of primary current parameters, affecting the amplitude and phase of current signals, and achieving the effect of improving accuracy

Inactive Publication Date: 2017-05-24
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the signal is easily interfered by the complex electromagnetic environment in the substation and other places, which affects the amplitude and phase of the current signal, thus increasing the error of the primary current parameters obtained after calculation.

Method used

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  • Rogowski coil and electronic current transformer applying Rogowski coil
  • Rogowski coil and electronic current transformer applying Rogowski coil
  • Rogowski coil and electronic current transformer applying Rogowski coil

Examples

Experimental program
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Embodiment Construction

[0022] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0023] A specific embodiment of an electronic current transformer of the present invention, such as Figure 1 to Figure 6 As shown, it includes a Rogowski coil 2 and an electronic circuit board with an integral function, and the electronic circuit board is electrically connected to the two terminals of the Rogowski coil 2 . The Rogowski coil 2 includes a coil base 3 composed of a skeleton and wires wound on the skeleton, an insulating layer 4 covering the surface of the coil base 3, a metal shielding layer 5 wrapped around the insulating layer 4, and a metal shielding layer 5 wrapped around the metal shielding layer 5. The protective layer 6 on the surface has a cushioning effect, and the material of the protective layer 6 is an insulating material.

[0024] The cross-section of the coil base 3 is a square structure, the metal shielding layer 5 is a rin...

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PUM

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Abstract

The invention relates to a Rogowski coil and an electronic current transformer applying the rogowski coil. The Rogowski coil comprises a coil substrate formed by a framework and a lead winding the framework, an insulating layer wrapping the surface of the coil substrate and a metal shielding layer wrapping the periphery of the insulating layer, an annular notch coaxial with the coil substrate is arranged on one side, close to the center of the coil substrate, on the metal shielding layer, the annular notch is used for a magnetic field generated on a primary conductor to pass to enter the coil substrate, and the metal shielding layer wraps the surface of the insulating layer. The annular notch is arranged to enable the magnetic field generated on the primary conductor to pass to enter the coil substrate, so that the coil substrate can induce the magnetic field generated on the primary conductor; meanwhile, electromagnetic interference of other exterior equipment is shielded through the metal shielding layer, and accuracy in measurement result is improved.

Description

technical field [0001] The invention relates to a Rogowski coil and an electronic current transformer using the Rogowski coil. Background technique [0002] Rogowski coil (Rogowski coil), also known as current measuring coil and differential current sensor, is a current sensor composed of a ring coil uniformly wound on a non-ferromagnetic material. It is a component of an electronic current transformer, and its output signal is current The time differential is a small current signal. Through a circuit that integrates the output voltage signal, the input current can be truly restored. Compared with traditional transformers with iron cores, Rogowski coils have the advantages of wide measurement range, high precision, stability and reliability, and simple structure, and can be widely used in the transmission and transformation of primary current by electronic current transformers. The Chinese utility model patent with the authorized announcement number CN 201717077 U discloses...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F5/00H01F27/36H01F38/30G01R15/18
CPCG01R15/181H01F5/00H01F27/36H01F38/30
Inventor 池立江袁亮马朝阳步梦琼张浩哲赵盼盼倪云玲
Owner STATE GRID CORP OF CHINA