Portable space charge measuring device and method using composite probe

A space charge and measuring device technology, applied to measuring devices, measuring electrical variables, instruments, etc., to achieve the effects of improving sensitivity and resolution, low cost, and stable and reliable contact

Pending Publication Date: 2020-12-29
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In summary, there is currently no economical, safe and portable space charge measurement device suitable for practical engineering scenarios

Method used

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  • Portable space charge measuring device and method using composite probe
  • Portable space charge measuring device and method using composite probe
  • Portable space charge measuring device and method using composite probe

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Embodiment 1

[0042] Such as figure 2 As shown, the present embodiment provides a portable space charge measuring device utilizing a composite probe for measuring the space charge of a flat sample 5. The space charge measuring device includes a high-speed square wave pulse power supply 1 and a composite probe 2 for taking signals at a low-voltage end. , amplifier 3, oscilloscope 4, metal substrate electrode 6 and isolation resistor 7, the voltage pulse transmission end of the signal composite probe 2 at the low-voltage end is connected to the high-speed square wave pulse power supply 1, the signal extraction end is connected to the amplifier 3, and the amplifier 3 is also connected to the oscilloscope 4, The EVA electrode side of the flat sample 5 is connected to the metal substrate electrode 6, and the other side is connected to the low voltage terminal to take the signal composite probe 2, and the metal substrate electrode 6 is connected to the isolation resistor 7 and then grounded.

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Abstract

The invention relates to a portable space charge measuring device and method using a composite probe. The device is used for measuring space charge distribution in a flat plate sample; and the portable space charge measuring device comprises a high-speed square wave pulse power supply, a low-voltage end signal taking composite probe, an amplifier, an oscilloscope and the like. According to the portable space charge measuring device and method using the composite probe, under the condition that no voltage is applied, the measuring device can independently complete space charge distribution measurement; and if an external voltage is needed, any existing direct-current voltage system can also be utilized and can be irrelevant to space charge measurement. Compared with the prior art, the defect that a measuring system in the prior art is complex is overcome, the operation safety and the convenience are greatly improved under the condition that the phase space resolution and the measuring sensitivity are achieved; meanwhile, the limitation that a traditional pressure wave method measuring device is large in size and cannot be moved is overcome; and the measuring device is easy to operate and convenient to carry.

Description

technical field [0001] The invention relates to the field of space charge measuring devices, in particular to a portable space charge measuring device and method using a composite probe. Background technique [0002] DC high-voltage transmission has broad engineering application prospects due to its advantages of low power loss, high transmission capacity, and easy interconnection between grids. Cross-linked polyethylene is the mainstream development direction of insulating materials in DC transmission cables. The biggest problem is that its internal space charge will continue to accumulate under the action of a strong electric field, which will cause distortion of the internal electric field of the material and damage the electrical insulation. Therefore, measuring the space charge distribution inside XLPE is the key content to study its insulating properties. [0003] The pressure wave method is one of the widely used methods for measuring space charge distribution at hom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/24
CPCG01R29/24
Inventor 张冶文孔佳莹曹泽宾潘佳萍徐景贤余朝湖郑飞虎
Owner TONGJI UNIV
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