Partial discharge free connector assembly for sleeve insulation detection

Abstract

A partial discharge free connector assembly for sleeve insulation detection comprises a shielding part, two upward pulling units with the same lengths and a high voltage generator. The upper ends of the upward pulling units are fixed to the top of a detection site, the lower ends of the upward pulling units are installed at two ends of a direct-current wall penetrating sleeve, one end of the direct-current wall penetrating sleeve is connected to a high voltage generator, and the upward pulling units comprise transition connecting rings, insulator strings and high level voltage sharing rings, which are connected sequentially from top to bottom. The stable and reliable connection of the direct-current wall penetrating sleeve for detection is implemented through simple structure, the detection device arrangement difficulty is lowered greatly, the requirements of power frequency alternate current, positive and negative polarity direct current, positive and negative polarity lightning impulse and positive and negative polarity operation impulse detection of the direct-current wall penetrating sleeve can be met, the arrangement is simple and flexible, and the insulation detecting efficiency of the direct-current wall penetrating sleeve is improved.

Description

technical field [0001] The invention relates to equipment for testing high-voltage insulation performance, in particular to a non-partial discharge connection assembly for testing the insulation performance of bushings. Background technique [0002] National standard GB / T 4109-2008 "Insulating bushing with AC voltage higher than 1000V", GB / T 22674-2008 "Bushing for DC system", GB / T 26166-2010 "Wall bushing for ±800kV DC system" And the IEC standard IEC 60137:2003 "Insulated bushings for alternating voltages above 1000V" stipulates that the testing items for the insulation performance of the wall bushing connecting the valve hall and the DC outdoor field equipment in the converter station of the DC transmission project include: power frequency withstand voltage Detection of partial discharge, detection of DC withstand voltage; measurement of partial discharge, detection of DC polarity reversal, detection of lightning impulse dry withstand voltage, detection of operating impul...

AI Technical Summary

Problems solved by technology

However, due to the complex structure of the metal frame base and the need to be firmly connected to the ground, the comprehensive detection field is generally not equipped with a metal frame base for the support system, and the metal frame base generally cannot be installed according to the direction of the detection power supply. The defect of flexible adjustment makes this type of support structure difficult to adjust and insufficient in stability during use

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