UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system

A technology of current sensor and Rogowski coil, which is applied in the direction of testing dielectric strength, etc., can solve the problem that UHF broadband current sensor cannot be used for partial discharge detection of cable intermediate joints.

Active Publication Date: 2014-01-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF3 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the existing UHF broadband current sensor based on the Rogowski coil princip

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system
  • UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system
  • UHF (Ultra High Frequency) broadband current sensor based on Rogowski coil principle and joint monitoring system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0101] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0102] The joint monitoring system of UHF broadband current sensor based on the principle of Rogowski coil, the UHF broadband current sensor based on the principle of Rogowski coil—

[0103] The shape of the magnetic core is two halves of the ring, and the two halves of the ring core are combined to form a ring-shaped core;

[0104] Magnetic core material: iron-based nanocrystalline alloy material;

[0105] Magnetic core size: 74×54×15 (in mm);

[0106] Winding material: copper wire with a diameter of 0.8mm;

[0107] Coil turns: 15 turns;

[0108] Integral resistance: 20kΩ.

[0109]A joint monitoring system of UHF wide-band current sensor based on Rogowski coil principle, the joint monitoring system is composed of the above-mentioned UHF wide-band current sensor and VHF sensor based on Rogowski coil principle, the joint monitoring system co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a UHF (Ultra High Frequency) broadband current sensor based on a Rogowski coil principle and a joint monitoring system, and belongs to the technical field of local discharge monitoring of cables. The magnetic core of the UHF broadband current sensor is partitioned into two half rings, and is made of an iron-based nanocrystalline alloy material; a winding is a copper lead which is 0.8 millimeter in diameter; a coil is of 15 turns. The joint monitoring system consists of the UHF broadband current sensor and a VHF (Very High Frequency) sensor, wherein the VHF sensor and the UHF broadband current sensor are used together for monitoring a running cable in real time; data are transmitted to an oscilloscope; the oscilloscope is connected with an industrial control computer. According to the UHF broadband current sensor, a local discharge signal can be calibrated, so that background noise interference can be eliminated effectively, and a local discharge waveform is extracted accurately. A detection test is performed on a middle joint of a real cable with local discharge in an experiment and on field, and a test result indicates that the sensitivity is below 10pV; interference signals can be reduced effectively; a basis is provided for the judgment of field personnel.

Description

technical field [0001] The invention relates to a UHF broadband current sensor based on the Rogowski coil principle (Rogowski coil principle) and a joint monitoring system. It is a UHF broadband current sensor based on the Rogowski coil principle and uses the UHF broadband The invention relates to a cable partial discharge monitoring system for combined detection by a current sensor and a VHF sensor, belonging to the technical field of cable partial discharge monitoring. Background technique [0002] The relatively mature method of on-line detection of cable partial discharge is the VHF detection method, and the detection frequency band of this type of detection method is concentrated in the VHF frequency band (1 ~ 300MHz). In this method, the partial discharge signal attenuates slowly, and the calibration of the average apparent discharge of partial discharge can be realized. However, due to the weak and small amplitude of the partial discharge signal of the XLPE cable, th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01R31/12
Inventor 王伟何东欣孙运涛顾杰峰陈胜科杨凯杜家振
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap