Quantitative testing method and system for mass leakage rate of sulfur hexafluoride electrical equipment

A technology of sulfur hexafluoride and electrical equipment, which is applied in the field of quantitative testing of the absolute air leakage rate of sulfur hexafluoride electrical equipment, and can solve problems such as inaccurate measurement of the leakage rate of sulfur hexafluoride electrical equipment.

Inactive Publication Date: 2020-02-18
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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Problems solved by technology

[0005] This application provides a quantitative testing method and system for the quality leakage rate of sulfur hexafluoride electrical equipment to solve the technical problem of inaccurate measurement of the leakage rate of sulfur hexafluoride electrical equipment

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  • Quantitative testing method and system for mass leakage rate of sulfur hexafluoride electrical equipment

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[0035] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described The embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

[0036] This application provides a quantitative test system for the mass leakage rate of sulfur hexafluoride electrical equipment, including: a gas collection device, a temperature measurement device, a pressure measurement device, a timing device and a calculation module, wherein:

[0037] The temperature measuring device, the pressure measuring device, and the ...

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Abstract

The invention discloses a quantitative testing method and system for the mass leakage rate of sulfur hexafluoride electrical equipment. The method comprises the following steps: measuring the volume of sulfur hexafluoride gas leaking from a leakage point of the sulfur hexafluoride electrical equipment within a certain time interval; calculating the absolute gas leakage rate of the leakage point ofthe sulfur hexafluoride electrical equipment, and measuring and recording the field temperature and pressure intensity; and calculating the mass leakage rate of the sulfur hexafluoride. The leaking sulfur hexafluoride is collected with a gas collection cover, and is introduced into a U-shaped measuring tube through a gas-guide tube to increase the gas pressure intensity in the U-shaped measuringtube, so that the liquid level scale drops. The volume of the leaking sulfur hexafluoride can be measured indirectly by reading the change value of the liquid level scale within a certain time interval in order to calculate the mass leakage rate of the leakage point, thereby realizing the rapid and accurate determination of the absolute gas leakage rate at the leakage point of the sulfur hexafluoride electrical equipment. Through comparison with the overall weight loss rate of the electric equipment, the existence of other leakage points in the sulfur hexafluoride electrical equipment can be judged.

Description

Technical field [0001] This application relates to the technical field of electrical equipment leakage detection, and in particular to a quantitative test method and system for the absolute leakage rate of sulfur hexafluoride electrical equipment. Background technique [0002] Sulfur hexafluoride is a colorless, odorless, and non-toxic inert gas. It has high insulation strength and excellent arc extinguishing performance, cooling characteristics, non-combustibility and thermal stability, and can effectively reduce equipment costs and Reduce the size of the equipment, so it is widely used in high voltage electrical equipment of 10kV, 35kV, 110kV and above. [0003] According to statistical analysis, leakage defects of SF6 electrical equipment account for 40% to 60% of the total number of equipment defects. When there is a leak in the equipment, there are the following three hazards: one is that the pressure of the leaking gas chamber will gradually decrease, which will cause the ga...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/26G01F22/00
CPCG01F22/00G01M3/26
Inventor 何运华周金龙郭新良熊艳梅杨斌程雪婷宋玉锋杨雪滢
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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