Low-Voltage Field Measurement for GIS DS Switching VFTO
This paper introduces the testing process of low-voltage measurement method for 550kV GIS disconnector switch (DS) switching VFTO(very fast transient overvoltage) on site.The test results are adopted for checking and modifying the parameters used in EMTP calculation,in order to ensure the more accurate estimation of the VFTO waveform and peak value during 550 kV GIS DS switching operation,and provide the guidance and validation of the discharge control design in the case of DS restriking ground flashover fault.Then it is suggested to apply the low-voltage measurement for VFTO after the on-site GIS installation for checking the insulation coordination among DS design,GIS,tansformer,etc.
gas insulated switchgeardisconnector switchVFTOlow-voltagemeasurement
NETL
NSTL
万方数据
维普
