Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Current measuring devices and current measuring systems

A technology for current measurement and power equipment, applied in the direction of measuring electrical variables, measuring current/voltage, measuring devices, etc., can solve the problems of unsuitable measurement of high-frequency current and low flexibility of current measurement of power equipment

Active Publication Date: 2022-05-10
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for some ungrounded power equipment or power equipment with a non-unique grounding wire at the end of the bushing (which will cause current shunting), the above method of measuring high-frequency current is not applicable, and the flexibility of current measurement of power equipment is low

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
  • Current measuring devices and current measuring systems
  • Current measuring devices and current measuring systems
  • Current measuring devices and current measuring systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0027] There are various power equipment deployed in the power grid, and the safe and reliable operation of the power equipment can ensure the safe and reliable power supply of the power grid. Therefore, it is necessary to detect possible abnormalities in the operation of the power equipment.

[0028] The power transformer is a key power equipment in the power grid. The power transformer is a device used to change an AC voltage (current) of a certain value into another voltage (current) with the same frequency or several different values. By measuring the high-frequency current superimposed in the power frequency current of the power transformer, it is possible to monitor whether there are abnormalities such as lightning strikes a...

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 application discloses a current measuring device and a current measuring system, which relate to the technical field of electric power equipment. The current measuring device is used to measure the high-frequency current superimposed in the power frequency current of the power equipment. The power equipment includes a current-carrying conductor. The current measuring device includes a first Rogowski coil, a second Rogowski coil, and The resistance assembly between the second Rogowski coils; the first Rogowski coil includes a high-frequency magnetic core, and the second Rogowski coil includes a low-frequency magnetic core. When the first Rogowski coil and the second Rogowski coil are sleeved on a current-carrying conductor, the The magnitude of the first induced voltage induced in the first Rogowski coil and the second induced voltage induced in the second Rogowski coil by the power frequency current in the current conductor are equal, and the directions of the first induced voltage and the second induced voltage on the contrary. The current measurement device and the current measurement system of the embodiments of the present application can improve the flexibility of current measurement of electric equipment.

Description

technical field [0001] The present application relates to the technical field of power equipment, and in particular to a current measuring device and a current measuring system. Background technique [0002] There are various power equipment deployed in the power grid, and the safe and reliable operation of the power equipment can ensure the safe and reliable power supply of the power grid. Therefore, it is necessary to detect possible abnormalities in the operation of the power equipment. [0003] The power transformer is a key power equipment in the power grid. The power transformer is a device used to change an AC voltage (current) of a certain value into another voltage (current) with the same frequency or several different values. By measuring the high-frequency current superimposed in the power frequency current of the power transformer, it is possible to monitor whether there are abnormalities such as lightning strikes and overvoltages in the power transformer. In 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
Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R15/18
CPCG01R19/0092G01R15/181G01R15/186
Inventor 吴旭涛周秀李秀广何宁辉田天罗艳马云龙牛勃汲胜昌周童浩庄哲
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com