Solid insulation voltage resistance performance test system under high voltage and low temperature Paschen condition

Abstract

The invention discloses a solid insulation voltage resistance performance test system under a high voltage and low temperature Paschen condition. The solid insulation voltage resistance performance test system comprises a detection container and a substance to be tested, wherein the substance to be tested is suspended in the detection container; an insulation socket is arranged on the side face of the detection container; the substance to be tested comprises a metal tube; an insulation layer to be tested is coiled outside the metal tube; both ends of the metal tube are fixedly communicated with extension tubes with closed outer ends respectively; insulators are additionally arranged on the extension tubes respectively; insulation layers are additionally coiled on the extension tubes and the insulators respectively to form extension sections; the extension sections are led out of holes formed on the front end face and the rear end face of the detection container respectively; a temperature sensor is arranged on the insulation layer to be tested and an aluminum foil is wrapped on the insulation layer to be tested so as to form a grounding pole; and a measurement line of the temperature sensor and the aluminum foil grounding pole are lead out of the insulation socket. By the solid insulation voltage resistance performance test system, Paschen condition electric performance test of a solid insulation layer of a high voltage part of a large-size superconducting magnet can be realized; and the problems of a voltage resistance performance test method and a judgment measure of a high voltage insulation part working in a vacuum environment can be solved basically.

Description

[0001] Technical field: [0002] The invention mainly relates to, especially relates to a solid insulation withstand voltage performance test system for a large superconducting magnet system under high-voltage and low-temperature Paschen conditions. Background technique: [0003] Paschen's law is the basic characteristic of gas discharge. It mainly describes the nonlinear functional relationship between gas breakdown voltage V, gas pressure p, and high and low potential distance d. The Paschen discharge function V=f of different gases can be obtained by using experimental testing methods (pd). Generally speaking, when the distance between the high and low potentials is constant (that is, the electrode position is fixed), the breakdown voltage of the gas has a minimum value under a certain pressure condition. Usually, the breakdown voltage is on the order of tens to hundreds of volts. We The lowest discharge voltage point in the Paschen discharge function relationship is...

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Problems solved by technology

[0005] must not be ignored, and the traditional atmospheric environment withstand voltage test can no longer meet the test requirements of superconducting magnet systems. In contrast, the low temperature Paschen condition DC withstand voltage test The test environment that can more effectively reflect the actual operating conditions has attracted more and more attention from related research fields.

[0006] At present, there are various domestic and international test standards on insulation electrical withstand voltage performance, but there are few reports on Paschen condition withstand voltage test. Paschen condition under low temperature environment The electric resistance test is rarely heard of, so the development of this type of insulation and electrical performance test methods, the establishment and improvement of related test platforms, are of great benefit to superconducting applications, high-energy physics and other fields

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