Oil-paper composite insulation dielectric response test system

Abstract

The invention relates to an oil-paper composite insulation dielectric response test system. The system comprises a shell, a support, a first electrode, a second electrode, and multiple positioning rods. The support is fixed at the bottom of the shell. The first electrode is arranged inside the shell. The second electrode is arranged on the support and disposed under the first electrode. The multiple positioning rods are vertically arranged at the edge of the support to fix a tested sample. The system has reliable performance, can precisely control the size ratio of an oil channel to insulating paper, and thus, can simulate the oil-paper barrier structures of all kinds of oil-immersed power transformers. In addition, with the oil-paper composite insulation dielectric response test system, the problem that the oil-paper insulation dielectric response test repeatability is poor is solved.

Description

technical field [0001] The invention relates to the field of electrical equipment insulation aging and life prediction, in particular to a dielectric response test system for oil-paper composite insulation. Background technique [0002] In recent years, dielectric response-based technology has been extensively studied due to its characteristics of easy operation and rich insulation information, especially its strong anti-interference ability, and has attracted extensive attention in the field of transformer oil-paper insulation diagnosis. In order to better apply the dielectric response technology to study the diagnosis method of transformer oil-paper insulation in the laboratory, the oil-paper insulation structure of the transformer must be simulated equivalently in the laboratory to obtain accurate dielectric response information of the oil-paper insulation. Electrodes, there are at least the following problems and shortcomings during the test process: (1) The position of ...

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Problems solved by technology

In order to better apply the dielectric response technology to study the diagnosis method of transformer oil-paper insulation in the laboratory, the oil-paper insulation structure of the transformer must be simulated equivalently in the laboratory to obtain accurate dielectric response information of the oil-paper insulation. Electrodes, there are at least the following problems and shortcomings during the test process: (1) The position of the test sample between the electrodes cannot be fixed, which may cause direct contact and short circuit between the upper and lower electrodes, and the repeatability will also be affected; (2) During the test process Bubbles will appear between the oil and paper, resulting in poor repeatability of the dielectric response curve; (3) It is impossible to accurately control the size ratio of the oil passage and insulating paper, thereby simulating the main insulation structure of various transformers

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