H(2)S and SO(2) are important characteristic gases of partial discharge (PD) generated by latent insulated defects in gas insulated switchgear (GIS). The detection of H(2)S and SO(2) is of great significance in the diagnosis and assessment of the operating status of GIS. In this paper, we perform experiments on the gas sensitivity of unmodified multi-walled carbon nanotubes (MWNTs) and those mo...

Abstract The surface charge accumulation on the basin insulator is a particular problem in high‐voltage direct current (HVDC) gas insulated switchgears (GIS) and transmission lines (GIL), which restricts development application of extra/ultra (EHV/UHV) technology. distribution anti‐flashover performance are closely related to shape. To obtain optimal insulator, shape optimisation model based ar...

We begin by allowing a gas to occupy a well insulated vessel, where the pressure (Pinitial) is a bit higher than atmospheric pressure (Vinitial and Tinitial are known). The vessel is then opened and closed rapidly, allowing the gas to escape at an intermediate pressure equal to atmospheric pressure (Pinter). The speed with which this is done is crucial, because if there is appreciable heat loss...

The ability to transfer load currents between parallel busbars is one of the main requirements for most disconnector switches in gas insulated as well as air insulated substations today. As such, the capability limits and testing methods are internationally standardized in IEC 62271-102. The test circuit dictated in this standard is the Thévenin equivalent of the high current, power frequency a...