Partial discharge test platform and method for high-voltage switch cabinet insulator

Abstract

The invention discloses a partial discharge test platform and method for a high-voltage switch cabinet insulating part. The platform comprises a partial discharge shielding room for isolating externalelectromagnetic interference, and a partial discharge operation console, a power frequency alternating current power supply, a partial discharge-free voltage regulator, a partial discharge-free testtransformer, a partial discharge-free protection resistor, a coupling capacitor, a partial discharge tester, a shielded stranded wire, an insulating part power connection plate and an insulating partsupporting part which are arranged in the partial discharge shielding room, wherein the insulating part supporting part is used for installing an insulating part, the insulating part power connectionplate is used for being electrically connected with the insulating part, the non-partial-discharge protection resistor is electrically connected with the insulating part power connection plate throughthe shielded stranded wire, the output of the non-partial-discharge test transformer is connected with the non-partial-discharge protection resistor, the coupling capacitor is connected with the shielded stranded wire, and the partial discharge tester is connected with the coupling capacitor. The platform and method can effectively reduce the background partial discharge amount, improves the testaccuracy, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of partial discharge tests, in particular to a partial discharge test platform and method for insulating parts of high-voltage switch cabinets. Background technique [0002] When partial discharge occurs inside the power equipment, it will be accompanied by shocking vibration and electric sparks. These discharges will corrode the insulation, and eventually lead to insulation failure and insulation accidents. The partial discharge test of switchgear insulation can effectively check insulation defects such as bubbles and cracks inside the insulation that are difficult to find in conventional withstand voltage tests. Through relevant inspections, the quality level of internal insulation can be improved and the probability of insulation failure of internal equipment can be reduced. [0003] According to the standard GB 3906-2006 "3.6 ~ 40.5kV AC metal-enclosed switchgear and control equipment", the partial disch...

AI Technical Summary

Problems solved by technology

Due to the strict requirements of the partial discharge test on the discharge amount, coupled with the existence of electromagnetic interference in the external environment, and the existence of partial discharge in many partial discharge test platforms, the partial discharge amount in the background often cannot meet the test requirements.

[0004] In addition, in the existing test process, ordinary twisted w

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