Gas insulated electric equipment partial discharge multi-source joint detection method

Abstract

The invention belongs to the field of on-line monitoring technology of insulative condition of SF6 (sulfur hexafluoride) gas insulated electric equipment, and in particular relates to a gas insulated electric equipment partial discharge multi-source joint detection method. The detection method mainly comprises the steps of preparing a test, cleaning a stainless steel cylinder, filling with SF6 gas, performing an industrial frequency AC SF6 gas PD test, pulse current detection, ultrahigh frequency sensor detection, fluorescent optical fiber sensor detection, discharge gas collection and component detection and the like. The detection method provided by the invention is simple in operation, liable to promote, and provides references for multi-dimensional information joint detection method. The detection method is widely applied to SF6 gas insulated electric equipment partial discharge multi-sensor joint detection under the condition of power frequency, and provides a simple test scheme for multi-dimensional information extraction of PD (Potential Difference) decomposition characteristics and a decomposition theory.

Description

technical field [0001] The present invention belongs to sulfur hexafluoride (SF 6 ) The technical field of on-line monitoring of the insulation state of gas-insulated electrical equipment, specifically relates to a multi-sensor joint detection test method for partial discharge of gas-insulated electrical equipment. Background technique [0002] With sulfur hexafluoride gas (SF 6 ) As an insulation and arc extinguishing medium, SF6 gas insulated switchgear (GIS for short) develops rapidly and is widely used in high voltage and The EHV / UHV field has gradually become one of the preferred equipment and important symbols of modern substations. GIS has always been generally considered as low-maintenance or even maintenance-free high-voltage electrical equipment, but according to the statistics of the International Power Grid Commission (CIGRE), its failure rate is much higher than the failure level recommended by IEC standards. Some types of insulation faults that are more harm...

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Problems solved by technology

[0006] The purpose of the present invention is aimed at the existing SF 6 A single partial discharge signal detection method for gas-insulated electrical equipment, providing a SF 6 Experimental method for multi-sensor joint detection of partial discharge in gas-insulated electrical equipment, simulating SF in the laboratory 6 Partial discharge under various typical defect models in gas-insulated electrical equipment, so as to obtain characteristic information such as sound, light, and composition of partial discharge, which is an SF based on multi-source partial discharge information. 6 Provide an experimental basis for fault diagnosis and insulation state assessment of gas-insulated electrical equipment

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