Method and system for detecting gas decomposition product in circuit breaker under discharge working condition

A technology of gas decomposition and decomposition products, applied in the direction of measuring electricity, measuring electrical variables, testing dielectric strength, etc.

Active Publication Date: 2021-01-08
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the current problem that the discharge decomposition products of environmentally friendly insulating gases in power equipment provide guidance for equipment fault detection and operation maintenance, and provide a method and system for detecting gas decomposition products in circuit breakers under discharge conditions

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  • Method and system for detecting gas decomposition product in circuit breaker under discharge working condition

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Embodiment Construction

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0038] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art wi...

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Abstract

The invention discloses a method and system for detecting a gas decomposition product in a circuit breaker under a discharge working condition; and the method comprises the following steps: 1), optimizing gas molecules based on a density functional theory method, and constructing cation and anion structures of the gas molecules; 2), performing flexible potential energy surface scanning calculationon the gas molecules to determine the bond energy of each chemical bond in the particles so as to determine the dissociation path of the molecules and ions; 3), repeating the step 1); 4), analyzing the compounding process between free radicals after dissociation and between free radicals and molecules, and analyzing the compounding process between ions after ionization and between ions and molecules; 5), calculating the energy of neutral molecules, positive ions and negative ions by utilizing a Schrodinger's equation, calculating the affinity and ionization energy of gas molecules and products thereof, and evaluating the ionization or adsorption difficulty degree of the gas molecules; and 6), establishing an experimental platform for detecting the partial discharge decomposition product,and detecting the decomposition product of the insulating gas under the discharge working condition.

Description

【Technical field】 [0001] The invention belongs to the field of electrical insulating media, in particular to a method and system for detecting gas decomposition products in a circuit breaker under discharge conditions. 【Background technique】 [0002] SF 6 Because of its good insulation and arc extinguishing properties, it is widely used in high voltage power equipment. However, SF 6 is a greenhouse gas with a very high global warming potential, CO 2 It is 23,500 times that of the gas and has a very long life in the atmosphere. It has been listed as one of the greenhouse gases with restricted emissions. In the past two years, 3M and ALSTOM have cooperated to develop a new type of environmentally friendly gas C 4 f 7 N is used in GIS, GIL high-voltage equipment. [0003] However, whether the new environmentally friendly insulating gas can replace SF 6 Gas is used in actual power equipment, in addition to its electrical properties, the decomposition characteristics of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01R31/12
CPCG01N30/02G01R31/1227
Inventor 陈力张博雅李兴文
Owner XI AN JIAOTONG UNIV
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