Device and method for testing influence of different metal materials on SF6 local sudden discharge fault decomposing

A technology of metal materials and experimental devices, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., to achieve the effect of low cost

Pending Publication Date: 2017-08-01
YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the deficiency of the existing gas-insulated electrical equipment's sudden partial discharge fault (spark discharge fault) simulation experiment device, a different metal material is provided for SF 6 The experimental device and method of the influence of DC PD decomposition can simulate the spark discharge under the defect model of metal protrusions composed of various metal materials in the gas-insulated electrical equipment in the laboratory, and obtain the effects of different metal materials on the decomposition gas components and their contents, etc. The influence of characteristic quantities provides a solid experimental basis for the practical engineering application of on-line monitoring and insulation state assessment of gas-insulated electrical equipment

Method used

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  • Device and method for testing influence of different metal materials on SF6 local sudden discharge fault decomposing
  • Device and method for testing influence of different metal materials on SF6 local sudden discharge fault decomposing
  • Device and method for testing influence of different metal materials on SF6 local sudden discharge fault decomposing

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A different metal material to SF 6 Experimental setup for the effect of spark discharge decomposition. Mainly include: pressurized system, SF 6 Discharge gas chamber, inspection system and protruding defect models for different metallic materials. It is characterized in that in the protrusion defect models of different metal materials, the high-voltage needle electrodes are made of tungsten metal, and the low-voltage plate electrodes are made of pure aluminum, brass and 18 / 8 stainless steel respectively, and in the different metal materials mentioned above Material vs. SF 6 The effects of spark decomposition were tested separately in the experimental setup.

[0042] The pressurization system is composed of a voltage regulating transformer, a high-voltage halo-free experimental transformer, a high-voltage rectifying silicon stack, a filter capacitor, a capacitor voltage divider and a protection resistor. The input end of the voltage regulating transformer 1 is connec...

Embodiment 2

[0048] A different metal material to SF 6 The experimental device for the impact of spark discharge decomposition is the same as in Example 1. Needle electrode 31 is made of pure tungsten. The main body of the needle electrode is made of brass. The total length is 60mm. It is connected to the high-voltage SF6 / air bushing 12 through the internal threaded hole; the plate electrode 32 is made of 18 / 8 stainless steel, and its shape is round, with a diameter of 100 mm and a thickness of 10 mm. catch. The needle-plate spacing can be adjusted through the lifting thread between the grounding metal rod 19 and the grounding conductive rod 30, so that the needle-plate spacing can be adjusted within the range of 0-40mm.

Embodiment 3

[0050] A different metal material to SF 6 The experimental device for the impact of spark discharge decomposition is the same as in Example 1. Needle electrode 31 is made of pure tungsten. The main body of the needle electrode is made of brass. The total length is 60mm. And it is fixedly connected with the high-voltage SF6 / air bushing 12 through the inner threaded hole; the plate electrode 32 is made of pure aluminum, its shape is circular, the diameter is 100mm, and the thickness is 10mm, and it is fixed with the grounding conductive rod 30 through the inner threaded hole. The needle-plate spacing can be adjusted through the lifting thread between the grounding metal rod 19 and the grounding conductive rod 30, so that the needle-plate spacing can be adjusted within the range of 0-40mm.

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Abstract

The invention relates to a device and a method for testing influence of different metal materials on SF6 local sudden discharge fault decomposing. The device comprises a pressurizing system, an SF6 discharging gas chamber, a detection system and a metal material protrusion defect model, wherein the output end of the pressurizing system is connected with the metal material protrusion defect model; the metal material protrusion defect model is arranged in the discharging gas chamber, and the detection system is simultaneously connected with the discharging gas chamber and the pressurizing system. The device and the method have the beneficial effects that the cost is low, and the testing method is simple and is suitable for being popularized; the spark discharge fault state caused by different metal protrusion defects in the SF6 electrical insulation equipment can be well simulated; the blank of failure to evaluate the influence of different metal materials on SF6 spark discharging decomposing in the existing test equipment and method for detecting the SF6 decomposing gas component to evaluate the SF6 insulation electrical equipment state is filled; the possibility is created for verifying the influence characteristic and action mechanism of the metal materials on the SF6 spark discharging decomposing.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring and diagnosis of the insulation state of gas electrical insulation equipment, in particular to a kind of different metal materials for sulfur hexafluoride SF 6 Gas-insulated equipment partial sudden discharge fault simulation experiment device and experiment method. Background technique [0002] Gas Insulated Switchgear, GIS refers to all or part of the use of sulfur hexafluoride SF 6 Metal-enclosed equipment with gas as the insulating medium has the advantages of compact structure, small footprint, high reliability, small maintenance workload, convenient on-site installation, small electromagnetic radiation, and strong environmental adaptability. It has been widely used in the construction and transformation of urban power grids, and has gradually become one of the main equipment of modern power grids. Its safe and reliable operation directly determines the reliability of modern urban...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1254
Inventor 朱宁唐炬徐肖庆曹政钦韦瑞峰曾福平杨光彦郭皓赵荣普胡昌斌李骞代正元董伟陈欣张晓星姚强
Owner YUNNAN POWER GRID CO LTD KUNMING POWER SUPPLY BUREAU
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