Unlock instant, AI-driven research and patent intelligence for your innovation.

Electrical equipment provided with a moisture sensor

A technology of electrical equipment and sensors, applied in the field of moisture detection, can solve the problem of inability to capture the dynamics of hot water in windings

Active Publication Date: 2021-12-03
HITACHI ENERGY SWITZERLAND AG
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of the sensor in that paper is that it can only be used in certain neutral / low gradient regions of the transformer and thus cannot capture the moisture dynamics of winding hot spots

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
  • Electrical equipment provided with a moisture sensor
  • Electrical equipment provided with a moisture sensor
  • Electrical equipment provided with a moisture sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The inventive concepts will now be described more fully hereinafter with reference to the accompanying drawings, in which example embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; the invention is not limited to the disclosed embodiments; rather, these embodiments are provided by way of example such that This disclosure is thorough and complete, and fully conveys the scope of the inventive concept to those skilled in the art. Throughout the specification, the same reference numerals refer to the same elements.

[0047] figure 1An example of an electrical device 1 is depicted. The electrical device 1 may eg be an electromagnetic induction device, eg a transformer such as a power transformer or a reactor or a bushing. Electrical equipment can typically be either high voltage or medium voltage electrical equipment. The electrical device 1 may eg be a hig...

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

An electrical device comprising: a voltage carrying part, a solid insulation system (8) configured to electrically insulate the voltage carrying part, and a moisture sensor (2) configured to detect moisture in the solid insulation system (8), wherein the The moisture sensor (2) comprises: a capacitor (9) having: a first electrode (3), a second electrode (5) and a dielectric material arranged between the first electrode (3) and the second electrode (5) (7), wherein the solid insulation system (8) forms a dielectric material (7), the capacitance of the capacitor (9) providing an indication of the moisture content in the dielectric material (7).

Description

technical field [0001] The present disclosure relates generally to electrical equipment such as transformers and reactors, and more particularly to moisture detection in such equipment. Background technique [0002] Predicting the lifetime of large power transformers and estimating their remaining lifetime is of great practical significance for reliable operation and optimized asset management. It is well known that the life of a transformer depends primarily on the deterioration of its insulation, especially the solid insulation usually formed from cellulose paper and pressboard. Two important factors that determine the deterioration of transformer solid insulation are temperature and moisture. [0003] The paper "Development of moisture-in-solid-insulation sensor for power transformers" published by Garcia et al. on Sensors 2015, 15, 3610-3624 ("Development of moisture sensor in solid insulation for power transformers") discloses a A sensor for measuring moisture in powe...

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): G01N27/22
CPCG01N27/223G01N27/226
Inventor M·普拉丹
Owner HITACHI ENERGY SWITZERLAND AG