Device, system and method for measuring space charges by using electro-acoustic (PEA) method

An electro-acoustic pulse method, space charge technology, applied in measurement devices, electrostatic field measurement, measurement of electrical variables, etc., can solve problems affecting the reliability of DC ultra/ultra-high voltage equipment, differences in measurement results, and complex electric field calculations.

Active Publication Date: 2010-06-16
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the insulating material in the DC power equipment works under the joint action of the internal and external temperature difference and the DC electric field, and the temperature nonlinearity of the resistivity of the insulating material, so the space charge and electric field dist

Method used

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  • Device, system and method for measuring space charges by using electro-acoustic (PEA) method
  • Device, system and method for measuring space charges by using electro-acoustic (PEA) method
  • Device, system and method for measuring space charges by using electro-acoustic (PEA) method

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Embodiment 1

[0025] like figure 2 As shown, it is a structural block diagram of an electroacoustic pulse method space charge measuring device according to an embodiment of the present invention. The electroacoustic pulse method space charge measuring device 200 includes: an upper electrode unit 201 (which can be regarded as a first electrode), the upper electrode unit 201 includes: aluminum electrode 202, epoxy resin 203, capacitor C, resistor R1 and metal shell. The high-voltage DC power supply 205 is connected to the aluminum electrode 202 through a resistor R2. The pulse generator 206 is connected with the aluminum electrode 202 . Lower electrode 207 (can be regarded as the second electrode), the piezoelectric sensor 208 that links to each other with lower electrode 207; The constant temperature circulating bath 215 (which can be regarded as the second constant temperature source) is connected with the lower electrode unit 207 through double conduits.

[0026] The structure of the f...

Embodiment 2

[0034] like image 3 As shown, the embodiment of the present invention is an electroacoustic pulse method space charge measurement system 300, and the electroacoustic pulse method space charge measurement system 300 includes: a high temperature constant temperature source 306, a low temperature constant temperature source 307, a PEA electrode device 301, a high voltage direct current power supply 302, a pulse Generator 303, oscilloscope 304 and computer 305; Wherein, PEA electrode device 301 comprises (as Figure 4 Shown): the upper electrode unit 401 (which includes the first electrode), is in contact with one side of the insulating material sample to be tested, and is connected with the high-temperature constant temperature source 306 through a bidirectional conduit; the lower electrode unit 402 (which can be regarded as the second Electrode) is in contact with the other side of the insulating material sample to be tested, and is connected to the low temperature constant tem...

Embodiment 3

[0039] like Figure 7 As shown, the embodiment of the present invention is an electroacoustic pulse method space charge measurement system 700, and the electroacoustic pulse method space charge measurement system 700 includes: a high temperature constant temperature source 706, a low temperature constant temperature source 707, a PEA electrode device 701, a high voltage DC power supply 702, a pulse Generator 703, oscilloscope 704, and computer 705; wherein, the PEA electrode device 701 includes an upper electrode unit (including the first electrode), which is in contact with one side of the insulating material sample to be tested, and is in contact with a high-temperature constant temperature source 706 through a bidirectional conduit. Connection; the lower electrode unit (which can be regarded as the second electrode) is in contact with the other side of the insulating material sample to be tested, and is connected to the low-temperature constant temperature source 707 through...

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Abstract

The invention provides a device, a system and a method for measuring space charges by using an electro-acoustic (PEA) method. The device comprises a first electrode, a second electrode, a first thermostatic source, a second thermostatic source, a high-voltage direct current power supply, a pulse generator and a piezoelectric transducer, wherein the first electrode is used for contacting with one surface of the tested insulation material sample; the second electrode is used for contacting with the other surface of the tested insulation material sample; the first thermostatic source is used forconducting the temperature to the first electrode; the second thermostatic source is used for conducting the temperature to the second electrode; the high-voltage direct current power supply is used for transmitting the high-voltage direct current to the first electrode; the pulse generator is used for transmitting a high-voltage pulse signal to the first electrode; the piezoelectric transducer is used for detecting the acoustic signal of the tested insulation material sample, generated by the functions of the temperature gradient field, the high-voltage electric field and the high-voltage electric pulse, and is used for converting the acoustic signal into an electrical signal to output. The invention is used for measuring the distribution of the space charges in the high-voltage direct current power equipment insulation in the temperature gradient field.

Description

technical field [0001] The present invention relates to space charge distribution measurement technology in insulating materials, especially space charge distribution measurement technology for insulating materials in high-voltage DC power equipment under the joint action of internal and external temperature difference and electric field, specifically an electroacoustic pulse method space charge Measuring devices, systems and methods. Background technique [0002] In the prior art, the pulse electroacoustic method (PEA) is usually used to measure the space charge distribution of solid dielectric materials. However, the widely used system of this measurement technology can only measure at a uniform temperature at present, which brings inconvenience to how to deal with the temperature difference existing in the insulation of power equipment in actual operation. [0003] like figure 1 As shown, it is a structural block diagram of an existing PEA space charge measurement devic...

Claims

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Application Information

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IPC IPC(8): G01R29/12G01R29/24
Inventor 吴锴陈曦王霞成永红
Owner XI AN JIAOTONG UNIV
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