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Presents the introductory welcome message from the conference proceedings. May include the conference officers' congratulations to all involved with the conference event and publication of the proceedings record.
Insulation and thermal conductivity performances are two important factors which restrict the development of high voltage cable to high level. The composite materials of low density polyethylene (LDPE) doped with nano SiO2 and nano Al2O3 respectively were prepared through the method of melt blending. The section surface morphology of the samples was researched by field emission scanning electron microscope...
Based on low temperature plasma treatment of E-glass fiber, the performance of E-glass fiber reinforced epoxy resin composites are studied. Placed E-glass fiber in the device of low temperature plasma treatment for a certain time. The chemical groups on the surface of glass fiber are observed by infrared spectrometer(FTIR), and the change of the surface element content is tested by X-ray photoelectron...
Transformer efficiency purely depends on integral functions of solid and liquid dielectric. A good dielectric should possess the following properties like; high breakdown strength, high thermal stability, chemical inertness, environmental friendly and good heat transfer capacity. Natural esters such as Corn Oil (CRO) and Coconut Oil (CO) are chosen based on the fatty acid compositions and considered...
The recovery voltage method based on the time domain dielectric response, as a non-destructive electrical diagnostic method, is widely used in condition diagnosis of oil-paper insulation power transformers. However, its main characteristics are insufficient to distinguish the respective effects of thermal aging and moisture on oil-paper insulation. At present, some scholars have studied on how to...
It is well known that there is much electromagnetic interference on the gases insulated switchgear (GIS) operation environment, and which would bring some difficulties to distinguish the actual partial discharge signals with those interference. In this paper, three kinds of measures are introduced in detail, which have been proved to be effective to realize anti-interference for GIS partial discharge...
Sulfur dioxide SO2 is an important decomposition byproduct of sulfur hexafluoride SF6 under partial discharge in GIS apparatus. Responsive characteristics of semiconductor chemical gas sensors can be extremely improved by morphology tailoring of the sensing materials. In this manuscript, hierarchical flower-shaped ZnO sensing materials were synthesized with an environmental-friendly hydrothermal method...
When the single earth-return line of HVDC (High voltage direct current) system is functioning, the AC system in the same area will probably be influenced. Because two converting station at different DC potential constitute a loop via transmission line, causing certain direct current moving into the transformer neutral point and winding. The transformer DC magnetic biasing phenomenon will appear, leading...
This paper first briefly introduces the basic structure of converter transformer, analyses the mechanism of vibration through simulation of the converter transformer oil-tank, designs the test scheme. This paper introduces the application of wavelet analysis method in converter transformer fault identification, then apply these methods to 24 converter transformers to obtain the characteristics parameters,...
Hydrogen (H2), carbon monoxide (CO), and some hydrocarbon gases such as methane (CH4), ethane (C2H6), ethylene (C2H4) and acetylene (C2H2) are the typical fault gases extracted from transformer oil. Based on the framework of Density Function Theory (DFT), tin oxide SnO2 surface model, gas molecular models and adsorption models were built, responsibility. A first principles calculation using Cambridge...
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