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Insulating medium space charge measurement method and system based on magnetoacoustic system

A technology of insulating medium and space charge, applied in the high voltage field, can solve the problem of unintuitive measurement effect of thermal diffusion method, and achieve the effect of three-dimensional measurement

Active Publication Date: 2020-09-29
TSINGHUA UNIV
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Problems solved by technology

However, the measurement effect of the thermal diffusion method is not intuitive, the sensitivity and resolution of the measurement results are strongly related to the spatial position, and only one-dimensional measurement can be realized

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  • Insulating medium space charge measurement method and system based on magnetoacoustic system
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  • Insulating medium space charge measurement method and system based on magnetoacoustic system

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] The method and system for measuring the space charge of an insulating medium based on a magnetoacoustic system according to an embodiment of the present invention will be described below with reference to the accompanying drawings. First, the method for measuring space charge of an insulating medium based on a magnetoacoustic system will be described with reference to the accompanying drawings. .

[0029] figure 1 It is a flowchart of a method for measuring the space charge of an insulating medium based on a ma...

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Abstract

The invention discloses an insulating medium space charge measurement method and system based on a magnetoacoustic system. The method comprises the following steps: a time-varying magnetic field is applied in an insulating medium, and the time-varying magnetic field then generates an annular induced electric field in the insulating medium; space charges in the insulating medium vibrate under the action of an induced electric field to generate sound pressure signals, a sound sensor array is arranged outside the insulating medium, the sound pressure signals in all directions are recorded, and the two-dimensional or three-dimensional distribution condition of the space charges in the insulating medium can be obtained through an inversion algorithm. According to the method, a magnetic field source is not in contact with a measured object, charge vibration is measured through sound waves generated by vibration or electric signals generated by external electrodes of a medium, and two-dimensional and three-dimensional measurement of space charges is achieved.

Description

technical field [0001] The invention relates to the field of high-voltage technology, in particular to a method and system for measuring the space charge of an insulating medium based on a magnetoacoustic system, so as to measure the distribution of space charges accumulated inside the insulating medium. Background technique [0002] Insulation is crucial in the high-voltage field, which ensures the normal operation of various electrical equipment and devices. However, during the long-term use of insulating materials, one of the problems that often faces is the accumulation of internal space charges. Typical cases, such as high-voltage DC cable accessories and the insulation layer of the main body, will accumulate space charges. The accumulation of space charges will distort the local electric field, leading to partial discharge and insulation medium aging problems, which will lead to insulation breakdown and power failure. . In addition, in the development stage of insula...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 张波何鹏龙何金良胡军李琦庄池杰余占清曾嵘
Owner TSINGHUA UNIV
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