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Sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method

A technology of sulfur hexafluoride gas and partial discharge, applied in the direction of testing dielectric strength, etc., can solve the problems of equipment electric field distortion, metal burrs, loose parts or poor contact, etc., and achieve the effect of ensuring safe and reliable operation

Inactive Publication Date: 2018-01-09
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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AI Technical Summary

Problems solved by technology

However, SF 6 Gas insulated equipment (referred to as SF 6 Electrical equipment, such as gas-insulated combined electrical appliances (GIS, gas-insulated circuit breakers GCB, gas-insulated transformers GIT, and gas-insulated lines or pipelines GIL, etc.), will inevitably appear in the process of manufacturing, transportation, installation, maintenance and operation. A variety of insulation defects, such as metal burrs on the conductor, loose parts or poor contact, air gaps formed by the stripping of the conductor and the supporting insulator, remnants after overhaul, and metal particles in the cavity, etc., will cause SF 6 Different degrees of insulation defects are formed inside the equipment, which leads to distortion of the electric field inside the equipment, and then produces partial discharge (PD)

Method used

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  • Sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method
  • Sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method
  • Sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method

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Embodiment

[0041] Example: such as Figure 1 to Figure 10 Shown; A kind of partial discharge characteristic identification method based on sulfur hexafluoride gas decomposition characteristic, it comprises: described method step is as follows:

[0042] S1: Check SF 6 Whether the purity of the gas meets the standard, SF 6 That is sulfur hexafluoride;

[0043] S2: Detect SF 6 impurity gas content in the gas;

[0044] S3: Select SF 6 The characteristics of the decomposition components after gas partial discharge are detected and identified.

[0045] Check SF as described in step S1 6 Gas purity standards include: test SF 6 Whether the gas is damp or leaking; check SF 6 Whether the oxygen and moisture content in the gas exceeds the standard.

[0046] Detect SF in the step S2 6 The impurity gas content in the fresh gas mainly detects CO 2 Gas content, CF 4 Gas content, SO 2 f 2 Gas content and SOF 2 gas content.

[0047] SF in step S3 6 The characteristics of the decomposed com...

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Abstract

The invention discloses a sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method. The method includes the steps of S1, detecting whether purity of SF6 gas is up to the standard or not; S2, detecting content of impure gases in the SF6 gas; S3, selecting the decomposition characteristics of the SF6 after partial discharging for detection and identification. The sulfur hexafluoride (SF6) gas decomposition characteristics based partial discharge characteristic identification method has the advantages that properties and characteristics of insulation defect types in SF6 equipment can be accurately known and mastered so as to specify an effective maintenance strategy and guarantee safe and reliably running of the SF6 equipment.

Description

technical field [0001] The invention relates to the technical field of partial discharge detection of sulfur hexafluoride equipment, in particular to a method for identifying partial discharge characteristics based on the decomposition characteristics of sulfur hexafluoride gas. Background technique [0002] SF 6 Gases are widely used in gas-insulated equipment due to their excellent insulating and arc-extinguishing properties. However, SF 6 Gas insulated equipment (referred to as SF 6 Electrical equipment, such as gas-insulated combined electrical appliances (GIS, gas-insulated circuit breakers GCB, gas-insulated transformers GIT, and gas-insulated lines or pipelines GIL, etc.), will inevitably appear in the process of manufacturing, transportation, installation, maintenance and operation. A variety of insulation defects, such as metal burrs on the conductor, loose parts or poor contact, air gaps formed by the stripping of the conductor and the supporting insulator, remn...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 苗玉龙伏进邱妮印华姚强唐炬周艳玲曾福平宫林胡晓锐籍勇亮张施令
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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