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Bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment system and bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment method at non-uniform temperature

A technology of frequency-domain dielectric spectrum and oil-paper insulation, applied in the field of casing oil-paper insulation frequency-domain dielectric spectrum experiment system under uneven temperature, can solve the problem that the dielectric properties of casing oil-paper insulation cannot be accurately obtained

Active Publication Date: 2017-06-30
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an experimental system and method for the frequency-domain dielectric spectrum of casing oil-paper insulation under non-uniform temperature, so as to solve the technical problem that the existing testing methods cannot accurately obtain the dielectric properties of casing oil-paper insulation

Method used

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  • Bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment system and bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment method at non-uniform temperature
  • Bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment system and bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment method at non-uniform temperature
  • Bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment system and bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment method at non-uniform temperature

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Experimental program
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Embodiment 2

[0038] Further, the switch control system 39 includes: No. 1 wire 30, No. 2 wire 31, No. 3 wire 32, No. 1 switch 33, No. 2 switch 34, No. 3 switch 35, first wire 36 and second wire 37;

[0039] One end of the No. 1 wire 30 is connected to an end of the No. 1 switch 33, one end of the No. 2 wire 31 is connected to an end of the No. 2 switch 34, and one end of the No. 3 wire 32 is connected to the One end of No. 3 switch 35;

[0040] One end of the dielectric response tester 38 is connected to the other end of the No. 1 switch 33, the other end of the No. 2 switch 34, and the other end of the No. 3 switch 35 through the first wire 36;

[0041] One end of the dielectric response tester 38 is respectively connected to the other end of the No. 1 wire 30, the other end of the No. 2 wire 31, and the other end of the No. 3 wire 32 through the second wire 37 .

[0042] The switch control system 39 will close the No. 1 switch 33, disconnect the No. 2 switch 34, and No. 3 switch 35 is ...

Embodiment 3

[0045] Further, the oil-paper insulation temperature control system 29 also includes: No. 1 heat insulation layer 4 and No. 2 heat insulation layer 7; the No. 1 copper pipe 2 and the No. 2 copper pipe 5 pass through the No. 1 heat insulation layer 4 connection; the No. 2 copper pipe 5 and the No. 3 copper pipe 8 pass through the No. 2 heat insulation layer 7;

[0046] No. 1 heat insulation layer 4 has an outer diameter of 300 mm, an inner diameter of 190 mm, and a height of 25 mm. No. 2 heat insulation layer 7 has an outer diameter of 300 mm, an inner diameter of 190 mm, and a height of 25 mm. It is connected with No. 1 heat insulation layer 4, and the upper end of No. 2 PTC heating ring 6 and No. 2 copper pipe 5 is connected with No. 1 heat insulation layer 4 through insulating glue; the upper end of No. 2 PTC heating ring 6 and No. 2 copper pipe 5 The lower end is connected to No. 2 heat insulation layer 7 through insulating glue; the upper end of No. 3 PTC heating ring 9 an...

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Abstract

The invention provides a bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment system and a bushing oil-impregnated paper insulating frequency domain dielectric spectrum experiment method at a non-uniform temperature. The system comprises an experiment box, an oil-impregnated paper insulating temperature control system, an insulated oil box with a heating device, a 12V DC power supply, a connecting device between the experiment box and the insulated oil box, an acquiring and control system, a dielectric response tester, a switch control system and a computer. The method comprises the steps of starting the acquiring and control system so that insulating oil is circulated in an oil path, thereby keeping a constant oil temperature of the insulating oil in the experiment box; switching on the 12V DC power supply for heating to a Curie temperature; starting the dielectric response tester, performing frequency domain dielectric spectrum testing on the bushing oil-impregnated paper insulation at the non-uniform temperature by means of the switch control system, receiving data uploaded from the dielectric response tester by a computer, and performing corresponding storage and analysis. The system and the method provided by the invention can perform frequency domain dielectric spectrum testing on the bushing oil-impregnated paper at the non-uniform temperature, thereby researching the dielectric characteristic of the bushing oil-impregnated paper insulation at an actual working condition temperature.

Description

technical field [0001] The invention relates to the field of oil-immersed bushing insulation state diagnosis, in particular to a frequency-domain dielectric spectrum experiment system and method for oil-paper insulation of bushings at uneven temperatures. Background technique [0002] Transformer bushing is an important component of electrical equipment. It is used for the insulation of high-voltage leads of electrical equipment such as transformers and reactors from the metal casing. It is an important part of the power system. Its insulation performance is directly related to the safe, stable and economical operation of the power grid. During the operation of the oil-immersed bushing, the central conductive copper tube of the bushing will pass a large current. Due to the thermal effect of the current, the conductive copper tube of the bushing will generate heat. In the long-term operation, the heat generated by the current passing through the conductive copper tube If it c...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 廖维徐肖伟王科谭向宇邹德旭周利军周仿荣刘红文彭晶申元
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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