In order to evaluate the insulation condition of gas-insulated switchgear(GIS)during operation and avoid the limitations of single partial discharge detection methods in terms of accuracy and sensitivity

this paper proposes a multi-parameter fusion detection device for GIS based on the pulse current method and gas detection method.First

the principle of the multi-parameter fusion detection device for GIS is analyzed

and the types of gas that may be produced under the thermal effect during partial discharge and their variation patterns are analyzed.Then

the implementation method of the multi-parameter fusion detection device is described.Finally

the multi-parameter fusion detection device is applied to GIS

and a fault simulation experiment is designed to verify its effectiveness.The results show that the multi-parameter fusion detection device for GIS based on the pulse current method and gas detection method can effectively measure the partial discharge pulse signal of GIS under operating conditions

with a minimum partial discharge detection sensitivity of ≤38.6 pC.It can effectively monitor the characteristic gases

such as total non-methane hydrocarbons

nitrogen dioxide

and nitric oxide

generated due to insulation faults in GIS

realizing effective monitoring and early warning of the insulation deterioration process in operating GIS.