Device and method for simulating ablation fault of rotating and stepping cable buffer layer

Abstract

The invention discloses a rotating and stepping cable buffer layer ablation fault simulation device and method. 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 to the power frequency voltage loop unit for A buffer layer experimental unit for simulating buffer layer ablation failure; the buffer layer experimental unit includes a buffer layer experimental chamber, a displacement assembly installed in the buffer layer experimental chamber, a rotating assembly, and an electrode assembly mainly composed of a ball electrode and a rod electrode; The cable buffer layer is wound on the rod electrode, the displacement component is used to control the position of the ball electrode along the axis of the rod electrode, and the rotation component is used to control the rotation of the rod electrode. The invention can quickly and efficiently simulate the ablation process of the high-voltage cable buffer layer, prepare a large number of buffer layer ablation samples in a short time, and provide convenience for the research on the ablation characteristics of the high-voltage cable buffer layer.

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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