Composite probe for polymer space charge distribution measurement and measurement method thereof

A space charge and polymer technology, applied in the measurement of electrical variables, electrostatic field measurement, components of electrical measuring instruments, etc., can solve the problems of signal danger, complicated operation of measuring space charge, etc., to achieve good safety performance and improve measurement accuracy. the effect of improving reliability
CN111175549AActive Publication Date: 2020-05-19TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TONGJI UNIV
Publication Date
2020-05-19

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Abstract

The invention relates to a composite probe for polymer space charge distribution measurement and a measurement method thereof. The composite probe comprises a shell and also comprises a signal acquisition aluminum block, a quartz glass block, a piezoelectric ceramic piece, a voltage pulse transmission unit and a signal extraction unit which are fixed by the shell; a conductive material is attachedto an outer surface of the quartz glass block and makes contact with the shell, a positive electrode of the piezoelectric ceramic piece is connected with the voltage pulse transmission unit, a negative electrode of the piezoelectric ceramic piece is connected with the conductive material on the outer surface of the quartz glass block, and the signal acquisition aluminum block is connected with the quartz glass block and the signal extraction unit. Compared with the prior art, signals are extracted from a low-voltage end, and the composite probe has the advantages of safety, reliability, highmeasurement accuracy, small design, convenience in carrying, simplicity in operation, easiness in installation and the like.
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Description

Technical field

[0001] The invention relates to the field of measuring devices for electric charge and quantity, in particular to a composite probe for measuring polymer space charge distribution and a measuring method thereof. Background technique

[0002] Polyethylene materials are widely used in high-voltage DC transmission networks due to their excellent electrical and insulating properties, low price, and simple equipment maintenance. However, under the action of a strong electric field, the space charge inside the polyethylene will gradually accumulate, causing local distortion of the electric field in the insulating medium, and even seriously affecting the insulation performance of the polymer. Therefore, the space charge problem in polyethylene has always been an important issue in the field of high voltage insulation. Piezoelectric pressure wave method and laser pressure wave method (LIPP method) are the two main measurement methods of pressure wave method to measure th...

Claims

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