Rotary stepping type cable buffer layer ablation fault simulation device and method

A fault simulation device and buffer layer technology, applied in the direction of measurement device, measurement of electricity, measurement of electrical variables, etc., can solve the problem that the aluminum bellows-water blocking buffer layer structure cannot be simulated in the laboratory, and the buffer layer ablation cannot be reproduced. , the inability to prepare a large number of buffer layer ablation samples, etc.

Active Publication Date: 2020-10-27
SICHUAN UNIV
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Problems solved by technology

[0004] However, the main disadvantages of the above-mentioned existing buffer layer experimental devices and evaluation methods are: only a small amount of buffer layer samples can be tested and evaluated for the material properties and electrical properties, and a large number of buffer layer ablation samples cannot be prepared in a short time. The aluminum bellows-water-blocking buffer layer structure inside the real high-voltage transmission cable cannot be simulated in the laboratory, and the ablation failure of the buffer layer under real working conditions cannot be reproduced

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  • Rotary stepping type cable buffer layer ablation fault simulation device and method
  • Rotary stepping type cable buffer layer ablation fault simulation device and method

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Embodiment 1

[0036] This embodiment provides a rotating step-by-step cable buffer layer ablation fault simulation device such as 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 experiment unit 5 connected to the power frequency voltage loop unit for simulating the ablation failure of the buffer layer.

[0037] Such as 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 input end and output end of the voltage regulator 1 are respectively connected with the 220V mains and the input end of the power frequency test transformer 2 . The output end of the power frequency test transformer 2 is connected to the buffer layer test unit 5 through the fuse 3 . The voltmeter 4 is connected in parallel to both ends of the buffer layer experiment chamber 5 . The ammeter 6 is connected in ser...

Embodiment 2

[0045] In this example, take the actual 110kV high-voltage cable water-blocking buffer layer, cut it into a strip structure with a width of 50mm and a length of 1000mm, and then place it in an environment of 120°C and 0.008Mpa to dry for 24 hours, as this example Medium cable water-blocking buffer layer sample.

[0046] This embodiment provides a method for simulating the ablation fault of the rotary stepping cable buffer layer. Using the rotary stepping cable buffer layer ablation fault simulation device in Example 1, the high voltage cable is simulated under the set voltage amplitude. Buffer layer ablation simulation experiment, the specific steps are as follows:

[0047] (1) Drying of the buffer layer experimental unit 5: remove the shell 11 of the buffer layer experimental chamber, wipe it carefully with a non-woven cloth, and then vacuum-dry the components of the buffer layer experimental unit 5 at a drying temperature of 80°C. The drying vacuum degree is 0.008Mpa, and t...

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Abstract

The invention discloses a rotary stepping type 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 experiment unit connected to the power frequency voltage loop unit and used for simulating a buffer layer ablation fault. The buffer layer experiment unit comprises a buffer layer experiment cavity, a displacement assembly, a rotating assembly and an electrode assembly, wherein the displacement assembly and the rotating assembly are installed in the buffer layer experiment cavity, and the electrode assembly is mainly composed of a ball electrode and a rod electrode. The cable buffer layer is wound on the rod electrode, the displacement assembly is used for controlling the axial position of the ball electrode along the rod electrode, and the rotating assembly is used for controlling the rod electrode to rotate. The high-voltage cable buffer layer ablation process can be rapidly and efficiently simulated, a large number of buffer layer ablation samples are prepared in a short time, and convenience is provided for high-voltage cable buffer layer ablation characteristic research.

Description

technical field [0001] The invention belongs to the technical field of insulation characteristic experiments of high-voltage transmission cables, and relates to the artificial generation of ablation defects on the surface of the water-blocking buffer layer of high-voltage cables to analyze the electrical physical and chemical properties of the defective parts, and further study the ablation mechanism and ablation products of the water-blocking buffer layer under the action of an electric field Composition, in particular to a rotary stepping cable buffer layer ablation fault simulation device and method. Background technique [0002] With the rapid development of my country's urban power grids, the role of bridges and links of high-voltage transmission cables has become increasingly prominent. According to incomplete statistics, the total length of 110kV and above high-voltage cable lines put into operation in my country has exceeded 8000km, and the highest voltage level has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/20
CPCG01R31/1272G01R31/20
Inventor 李原周凯龚薇袁豪
Owner SICHUAN UNIV
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