Method for judging failure of gas insulated electrical device

Abstract

The invention discloses a method for judging whether a failure of a C3FCN / CO2 mixed gas insulated electrical device relates to the epoxy solid or not. The method comprises the steps of: (1) setting uptwo test models to simulate the working conditions that the epoxy material takes part in and does not take part in the failure of the C3FCN / CO2 mixed gas insulated electrical device; (2) detecting the decomposition gas product of the C3FCN / CO2 mixed gas under each of two test models by a gas chromatography-mass spectrometer; and (3), comparing the type and the relative content of decomposition product under each of two test models, so as to judge whether the failure of the mixed gas insulated device affects the epoxy material or not. The quality of the decomposition product selected by the method is stable, and is easy to be detected; the provided two methods identify quickly and precisely, and can provide support for applying the C3FCN / CO2 mixed gas to the gas insulated device.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, and relates to a method for judging the failure of gas-insulated electrical equipment, in particular to a method for judging C 3 f 7 CN / CO 2 Does the failure of mixed gas insulated electrical equipment affect the method of discharge failure of gas-solid insulation systems of epoxy resin materials. The present invention is applicable to all C 3 f 7 CN / CO 2 Electrical equipment in which mixed gas is used as a gas-insulated medium, including gas-insulated transformers (GIT), gas-insulated transmission lines (GIL), gas-insulated switches (GIS), etc. Background technique [0002] Gas-insulated electrical equipment is subjected to long-term stress such as electricity and heat during operation, and defects such as discharge and overheating may occur, which will affect the safe operation of electrical equipment. Currently, sulfur hexafluoride (SF 6 ) is the main insulating gas ...

AI Technical Summary

Problems solved by technology

while for C 3 f 7 CN / CO 2 There is no report on the fault judgment method of mixed gas insulation electrical equipment

due to C 3 f 7 CN / CO 2 Mixed gas and SF 6 The physical and chemical characteristics, insulation characteristics and decomposition characteristics of gases are different, so it is impossible to judge C by using the original method. 3 f 7 CN / CO 2 Does the failure of mixed gas insulated equipment affect the epoxy resin material

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