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

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 ...

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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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