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Current and surface pressure adjustable cable buffer layer ablation fault simulation device and method

A fault simulation device and surface pressure technology, which are applied in the measurement of current/voltage, the measurement of the property force of piezoresistive materials, and the measurement of current only, to achieve the effects of convenient operation, strong operability and simple structure

Active Publication Date: 2020-11-13
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the technical status quo of research on the influence of current and surface pressure on the ablation characteristics of the buffer layer, which is difficult to realize in the existing buffer layer testing and evaluation methods, the purpose of the present invention is to provide a high-voltage cable buffer layer ablation method with adjustable current and surface pressure. Corrosion fault simulation device and method, by adjusting the amplitude of the applied voltage and the quality of the voltage regulator, simulate the ablation conditions of the buffer layer under different currents and surface pressures, and then study the influence of current and surface pressure on the ablation characteristics of the buffer layer law

Method used

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  • Current and surface pressure adjustable cable buffer layer ablation fault simulation device and method
  • Current and surface pressure adjustable cable buffer layer ablation fault simulation device and method

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Embodiment 1

[0034] In this embodiment, the high-voltage cable buffer layer ablation fault simulation device with adjustable current and surface pressure is as follows: figure 1 As shown, it includes a power frequency voltage loop unit for providing a voltage applied to the buffer layer and a buffer layer ablation experiment unit connected to the power frequency voltage loop unit.

[0035] Such as figure 1 As shown, the power frequency circuit loop unit includes a voltage regulator 1 , a power frequency test transformer 2 , a fuse 3 , a voltmeter 4 and an ammeter 6 . The voltage regulator 1 should have a continuous voltage regulation function, and the manual control voltage regulation rate should not be greater than 2V / s. The input and output ends of the voltage regulator 1 are respectively connected to the 220V mains and the input of the power frequency test transformer 2. The maximum output voltage of the power frequency test transformer 2 should be less than 10kV, and the capacity shou...

Embodiment 2

[0043] In this example, a 110kV high-voltage cable non-woven fabric-sodium polyacrylate-fluffy cotton structure water-blocking buffer layer was taken and cut to a diameter of 100mm as a buffer layer sample.

[0044] In this embodiment, a high-voltage cable buffer layer ablation fault simulation method with adjustable current and surface pressure is provided. Using the high-voltage cable buffer layer ablation fault simulation device with adjustable current and surface pressure provided in Example 1, the Set the current amplitude and surface pressure to conduct the ablation experiment of the buffer layer of the high-voltage cable. The specific steps are as follows:

[0045] (1) Drying of the buffer layer ablation experimental unit: take off the sealing cover 7 of the buffer layer ablation experimental unit, use non-woven cloth to wipe each part of the buffer layer ablation experimental unit, and then carry out vacuum drying to each part, The drying temperature is 80°C-100°C, the...

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Abstract

The invention discloses a current and surface pressure adjustable cable buffer layer ablation fault simulation device and method. The device comprises a power frequency voltage loop unit used for providing voltage applied to a buffer layer and a buffer layer ablation experiment unit connected to the power frequency voltage loop unit. The buffer layer ablation experiment unit comprises a sealed cavity, a fixing and clamping assembly arranged in the sealed cavity and used for fixing and clamping a buffer layer, an electrode assembly used for applying current to the buffer layer, a pressure adjusting piece used for applying surface pressure to the buffer layer and a self-weight adjusting assembly. By adjusting the amplitude of the externally applied voltage and the mass of the voltage regulating part, the ablation working condition simulation of the buffer layer under different currents and surface pressures is realized, the ablation characteristics of the buffer layer under the influenceof different current amplitudes and surface pressures are further researched, and a reliable experimental platform can be provided for the fault simulation analysis of the buffer layer of the high-voltage cable.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electric cable insulation characteristic experiments, and relates to measuring the quality change in the ablation process of the water-blocking buffer layer of high-voltage cables to study the influence of the current amplitude in the buffer layer and the surface pressure of the buffer layer on the ablation process , specifically relates to a high-voltage cable buffer layer ablation fault simulation device and method with adjustable current and surface pressure. Background technique [0002] During the manufacturing, transportation, installation and operation of high-voltage cables, they often face damage and deformation problems. At this time, the physical and chemical characteristic parameters of the cable will change, resulting in an increase in the contact resistance between the cable aluminum sheath and the buffer layer, and serious heating, which eventually causes Buffer layer ablation;...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R1/04G01R19/00G01L1/18G01N17/00
CPCG01L1/18G01N17/00G01R1/0408G01R19/0092G01R31/1272
Inventor 李原周凯龚薇袁豪孔佳民
Owner SICHUAN UNIV
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