Device for testing insulating characteristic of oilpaper

Abstract

The invention relates to a device for testing an insulating characteristic of oilpaper. The device comprises an oil storage barrel, a cover and a box body; wherein the oil storage barrel, the cover and the box body are successively arranged. The box body is provided with a fixing member, a detachable electrode which is vertical with the fixing member and an adjusting member; wherein the fixing member, the detachable electrode and the adjusting member are arranged from inside to outside. The device well simulates a plurality of insulation faults which may occur in actual operation of a transformer, The device can be directly applied for guiding construction of an ultra-high-voltage power transmission system.

Description

Technical field: [0001] The invention relates to a high-voltage and insulation technology, and more particularly relates to a device for measuring the insulation properties of oil-paper. Background technique: [0002] During the 12th Five-Year Plan period, the country plans to put into operation as many as ten UHV DC lines, which means that my country will soon usher in a golden period of rapid development of the UHV industry. However, what is inconsistent with the actual progress of the project is that domestic basic research on the insulation characteristics of main power equipment on UHV DC lines is still in its infancy, neither systematic experimental research has been carried out, nor is there any conclusion that can be used by engineering and academic circles. consensus conclusions. The converter transformer is at the core of the UHV DC system, and because of its special position in the system, its main insulation must simultaneously withstand UHV AC, UHV DC, UHV AC s...

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Problems solved by technology

This kind of device has been effectively used in the preliminary experiment of exploring the insulation characteristics of oil-paper insulation structure, but with the deepening of research and the needs of engineering practice, we have to consider how to control the design of this device due to the lack of Errors—for example, after the distance between the electrodes is fixed, the shock caused by the process of filling the fuel tank and sealing the fuel tank will cause the electrodes on the bracket to loosen, and the position will be slightly deviated, which will make the There is an error in the distance between the electrodes. At the same time, in the research to be carried out, most of the required distance between the electrodes is in the order of millimeters. That is to say, a looseness of 1mm may cause a 10% error. The insulation characteristics of the system, especially for the study of insulation characteristics under small oil gaps are not acceptable

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