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The flashover of ice-covered suspension insulator string is one of the major problems for the transmission lines. In this paper, the AC flashover characteristics of FC-16p and XWP2-160 ice-covered suspension insulators with different contamination degree are investigated in the artificial climate chamber. The relationship between flashover voltage and contamination degree of insulator is analyzed...
Harmful metallic particles inside gas insulated switchgears (GISs), which are the most problematic among various defects in a GIS, is significant to the reliable operation of such electric equipment in power transmission network. This paper investigates, on an experimental basis, the partial discharge (PD) characteristics initiated from particles under ac voltage in atmospheric air with those placed...
In order to promote the flexibility about the selection of transmission corridor, DC gas-insulated transmission line (GIL) can be utilized to substitute part of the overhead line. One of the key factors that greatly threaten insulation level of GIL is the accumulation of surface charges along the supporting insulators under DC voltage. In this paper, the sphere-plane electrode system has been established...
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