Method for researching influence degree of nozzle material on arc discharge decomposition product of sulfur hexafluoride circuit breaker

Abstract

The invention discloses a method for researching the influence degree of a nozzle material on an arc discharge decomposition product of a sulfur hexafluoride circuit breaker and belongs to the technical field of electric power. According to the research on the influence degree of the nozzle material on the arc discharge decomposition product of the sulfur hexafluoride circuit breaker, key elements in a polytetrafluoroethylene material are marked by using an isotopic tracing technology, and the key elements are used as the nozzle material to prepare a nozzle which is placed in the sulfur hexafluoride circuit breaker and a breaking test is carried out; and then the type, the content and the concentration ratio of isotope-labeled products in the sulfur hexafluoride decomposition products are measured by using analysis equipment, and the research on the influence degree of the nozzle material on the sulfur hexafluoride circuit breaker arc discharge decomposition products is realized. According to the research method, problems of reaction path tracking and traceability of breaker nozzle material damage under the arc discharge working condition are solved, and important data support is provided for SF6 breaker operation state evaluation or fault diagnosis.

Description

technical field [0001] The invention belongs to the technical field of electric power, and relates to a research method for the influence degree of the arc discharge decomposition product of a sulfur hexafluoride circuit breaker to the spout material. Background technique [0002] Sulfur hexafluoride (SF 6 ) circuit breakers are widely used in power grids, and are currently the main type of circuit breakers with a voltage level of 72.5kV and above. The safety of the operating conditions of the equipment is directly related to the safety and stability of the power grid. The spout is SF 6 The key component of the circuit breaker blowing out the arc directly affects the breaking performance of the circuit breaker. PTFE is widely used in the manufacture of spouts because of its excellent insulation properties, chemical stability, high temperature resistance, and corrosion resistance. When the circuit breaker is opened, with the movement of the moving contact, the moving and s...

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Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a research method for the influence degree of the arc discharge decomposition product of sulfur hexafluoride circuit breaker by the nozzle material, and solve the reaction path of the damage of the nozzle material of the circuit breaker under the discharge condition Tracking and traceability issues, for SF 6 Provide important data support for circuit breaker operating status assessment or fault diagnosis

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