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A cable buffer layer ablation fault simulation device and method with adjustable current and surface pressure

A fault simulation device and surface pressure technology, applied in the direction of measuring current/voltage, measuring the property force of piezoelectric resistance materials, measuring devices, etc., to achieve the effect of convenient operation, strong operability, and intuitive and convenient experiment

Active Publication Date: 2021-05-07
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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  • A cable buffer layer ablation fault simulation device and method with adjustable current and surface pressure
  • A cable buffer layer ablation fault simulation device and method with adjustable current and surface pressure

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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 supplying a voltage applied to the buffer layer and a buffer layer ablation experiment unit connected to the power frequency voltage loop unit.

[0035] like figure 1 As shown, the power frequency voltage 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 the function of continuous voltage regulation, and the manually controlled voltage regulation rate should not be greater than 2V / s. The maximum output voltage of the power frequency test transformer 2 should be less than 10kV, and the capacity should not be less than 10kVA. The output end of the power frequency test transformer 2 is connected to the buffer layer ablation test unit through the ...

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 100 mm as a buffer layer sample.

[0044] In this embodiment, a method for simulating ablation faults of a high-voltage cable buffer layer 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 by The high-voltage cable buffer layer ablation experiment is carried out under the set current amplitude and surface pressure. 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 a non-woven fabric to wipe each part of the buffer layer ablation experimental unit, and then vacuum dry each part, The drying temperature is 80℃~100℃, the drying vacuum degree i...

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Abstract

The invention discloses a cable buffer layer ablation fault simulation device and method with adjustable current and surface pressure. The device includes a power frequency voltage loop unit for providing voltage applied to the buffer layer and a power frequency voltage loop unit connected Ablation of the buffer layer on the experimental unit. The buffer layer ablation experimental unit includes a sealed cavity, a fixed clamping assembly for clamping the buffer layer, an electrode assembly for applying current to the buffer layer, and a clamp for applying surface pressure to the buffer layer. Pressure regulator and self-weight adjustment components. The invention realizes the simulation of buffer layer ablation conditions under different currents and surface pressures by adjusting the applied voltage amplitude and the quality of the voltage regulator, and then studies the buffer layer ablation characteristics under the influence of different current amplitudes and surface pressures. It can provide a reliable experimental platform for the fault simulation analysis of the buffer layer of high voltage cables.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power cable insulation characteristic experiments, and relates to the method of measuring the quality change during the ablation process of the water-blocking buffer layer of the high-voltage cable 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] In the process of manufacturing, transportation, installation and operation of high-voltage cables, they often face damage and deformation problems. At this time, the physical and chemical characteristics of the cable will change, resulting in an increase in the contact resistance between the cable's aluminum sheath and the buffer layer, and serious heat generation. The buffer layer is ...

Claims

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Application Information

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Patent Type & Authority Patents(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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