Decomposition simulation experiment method for sulfur hexafluoride gas insulating medium electro-thermo combination

Abstract

The invention discloses a decomposition simulation experiment method for sulfur hexafluoride gas insulating medium electro-thermo combination. A decomposition experiment system for sulfur hexafluoride under the application number 201310551600.2 is used, and the method includes the steps of examining seal performance of the experiment system, cleaning a cylinder and performing SF6 gas filling. The method further includes the following steps that the maximum externally exerted experiment voltage Umax is measured, a parallel-plate electrode and a heating body are installed, initial discharging voltage Ust is measured, the initial decomposition temperature T0 of SF6 is measured when experiment voltage U=0.5 Ust, and an decomposition experiment is performed on SF6 at different temperatures when the experiment voltage U=0.5 Ust. The method has the advantages that the failure state of electro-thermo combination in SF6 gas insulation electrical equipment can be simulated, the defects that an existing experiment method and an existing evaluation method evaluate the state of the SF6 insulation electrical equipment through detecting components of SF6 decomposed gas, and take a discharging failure or an overheating failure in the SF6 gas insulation electrical equipment into consideration instead of both the discharging failure and the overheating failure are overcome, and the accuracy of judging the failures of the SF6 gas insulation electrical equipment is improved.

Description

technical field [0001] The invention relates to a gas insulating medium, in particular to a sulfur hexafluoride (SF 6 ) Simulation experiment method of decomposition of gas insulating medium. Background technique [0002] SF 6 Gas-insulated equipment (such as gas-insulated switch GIS and gas-insulated transformer GIT, etc.) has been widely used in the construction and transformation of modern power grids due to its stable operation, compact structure and small maintenance workload, and has gradually become a One of the main equipment of modern power grid. Although SF 6 The operation reliability of gas insulated equipment is higher than that of other ordinary electrical equipment, but the operation experience shows that the internal conductive joints often have poor contact due to manufacturing and installation process problems, resulting in increased contact resistance and contact points in normal work. Under the action of current, it will lead to abnormal heating and in...

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Problems solved by technology

[0014] For existing SF 6 Insufficiency of the gas insulation equipment fault simulation experiment method, the technical problem to be solved by the present invention is to provide a kind of decomposition simulation experiment method of sulfur hexafluoride gas insulation medium electric-thermal combination, which can more realistically simulate SF such as GIS in the laboratory 6 Different degrees of fault states and SF in gas-insulated equipment 6 The gas insulation medium decomposes under the action of electricity and heat during the fault process, and obtains the SF in the gas chamber 6 Decompose the data of gas components and their content, in order to further improve the evaluation of SF 6 The insulation state of gas-insulated equipment provides a reliable experimental basis

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