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Device and method for online monitoring SF6 circuit breaker fault types

A circuit breaker failure, SF6 technology, applied in the direction of measuring devices, circuit breaker testing, instruments, etc., can solve the problems of expensive infrared gas imaging, can only be used for individual important nodes, and cannot achieve real-time detection. The use efficiency is cost-effective, avoids information islands, and reduces the effect of transmission volume

Inactive Publication Date: 2019-01-11
NANCHANG HANGKONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of manual pumping and maintenance not only cannot achieve real-time detection, but also cannot detect live electricity, and it is easy to cause new airtight problems when opening and resealing the gas tank; while the temperature and pressure method has a complex structure, a large number of equipment, and is susceptible to electromagnetic interference Disadvantages; Infrared gas imaging is expensive and cannot determine the type of fault. Lidar equipment is numerous and expensive and can only be used for individual important nodes

Method used

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  • Device and method for online monitoring SF6 circuit breaker fault types
  • Device and method for online monitoring SF6 circuit breaker fault types
  • Device and method for online monitoring SF6 circuit breaker fault types

Examples

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Effect test

Embodiment 1

[0034] Embodiment 1: as figure 1 , image 3 and Figure 4 shown. A method for online monitoring of SF 6 (Sulfur hexafluoride) circuit breaker fault type device and method, install the second sealing valve 309 on the right side of the sealing gas tank 306, and connect the left side with the first sealing valve 304 of the circuit breaker gas transfer interface, open the second sealing Valve 309, and through the gas outlet, the inside of the sealed gas tank 306 is evacuated, and the SF with the same concentration as that in the circuit breaker is input 6 Gas until the air pressure is the same as the gas pressure in the circuit breaker, close the second sealing valve 309, and open the first sealing valve 304.

[0035] Such as image 3 , because the absorption gas chamber 21 communicates with the target gas in the sealed gas tank 306, when the narrow linewidth tunable laser 11 emits laser light with a certain wavelength and power, the laser light will enter the hollow-core pho...

Embodiment 2

[0042] Embodiment 2: a kind of for on-line monitoring SF 6 Devices and methods for circuit breaker fault types. When the wavelength division multiplexing method is used, the laser is generated by multiple narrow-linewidth tunable lasers 11 working at the same time. The number of narrow-linewidth tunable lasers 11 is the same as the number of target gases. Narrow linewidth tunable laser 11 outputs laser light of selected wavelengths corresponding to different target gases, and then the laser beams are synthesized into one laser beam by the combiner 5, and then divided into the gas absorption gas chamber 21 by the splitter 4 and waited The gas interaction is measured, and then the laser beam is separated by the grating beam splitter 39 to separate the laser beam containing multiple wavelengths, and enters the corresponding photodetector 32, and the optical signal is converted into an analog electrical signal, and then the A / D converter 34 converts the analog signal into a digita...

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Abstract

The invention discloses a device and a method for online monitoring SF6 circuit breaker fault type, which comprises a laser emission module, a photoelectric detection module, and a data processing / transmission module, wherein the laser emission module is a narrow linewidth laser; the photoelectric detection module is composed of a gas absorption chamber on each branch; and the data processing / transmission module is divided into a time division multiplexing method structure and a wavelength division multiplexing method structure. An operating method comprises a time division multiplexing methodand a wavelength division multiplexing method. The device and method for online monitoring SF6 circuit breaker fault type has the advantages that the existing SF6 gas insulated circuit breaker can bedirectly changed, the device is simple in structure, and is economical and efficient, convenient in installation and maintenance., high in detection precision, quick in response, high in accuracy, and anti-magnetoelectric interference. The invention can be widely used for monitoring and early warning of insulation conditions in SF6 gas insulated circuit breakers.

Description

technical field [0001] The invention relates to gas detection technology, in particular to a method for on-line monitoring of SF 6 Device and method for circuit breaker fault types. technical background [0002] SF 6 It is a colorless, odorless, non-toxic, non-corrosive gas at room temperature. It has extremely high dielectric strength and low melting point. Its insulation capacity is about 215 times that of air. In addition, it has excellent extinguishing properties. Arc performance and other advantages. Therefore, there are a large number of SF installed in the power system at present. 6 Electrical insulation equipment. However, in terms of actual operation, factors such as the manufacturing process of power equipment, installation methods and equipment aging make SF 6 Insulation defects are unavoidable in gas insulated circuit breakers, which can lead to partial discharge and overheating during equipment operation, which can lead to SF in the gas tank 6 The gas is e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01N21/31G01M13/00
CPCG01M13/00G01N21/31G01R31/327
Inventor 吴涛马帅胡蓉菁何兴道
Owner NANCHANG HANGKONG UNIVERSITY
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