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

A technology for partial discharge and electrical equipment, applied in the field of multi-sensor joint detection test for partial discharge of gas-insulated electrical equipment

Active Publication Date: 2016-03-09
WUHAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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

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Experimental program
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Embodiment

[0055] A multi-sensor joint detection experimental method for partial discharge of gas-insulated electrical equipment, using the above-mentioned device, for SF 6 The specific steps of PD simulation experiment and multi-dimensional partial discharge information collection and analysis for gas-insulated electrical equipment are as follows:

[0056] ⑴Experimental preparation

[0057] ①Placing artificial insulation defect model and device dust removal treatment

[0058] First, according to the schematic diagram of the test circuit figure 1 Accurately connect each device, ground all test equipment in turn to ensure the electrical safety of the test; uncover the spherical top cover 19 of the stainless steel columnar cavity 22 of the gas discharge chamber 7 in the test device, and use ethanol liquid to cover the stainless steel cavity 22 The inner wall of the artificial defect model 31 is cleaned and wiped, and the impurities and dust on the device are removed, and the two ends of ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01N30/02
CPCG01N30/02G01N2030/025G01R31/1254
Inventor 唐炬张晓星曾福平金淼万凌云姚强苗玉龙杜修明逯遥
Owner WUHAN UNIV
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