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It is crucial for the successful application of high-temperature superconducting (HTS) power transformers that they are able to survive under abnormal operations, such as a short-circuit fault. Modeling, based on the design of a four-winding three-phase HTS power transformer, suggests severe boiling will occur on the surface of the winding during a short-circuit fault and will jeopardize the turn-to-turn...
Gas insulated substation (GIS) has been widely used in the field of high voltage power transmission. However, GIS equipments are witnessing more and more internal faults and failures as the voltage class of power network and capacity of power system keep upgrading. Therefore, an effective way in assessing the internal insulation conditions of GIS equipments is needed more urgently than ever. The severity...
Numerous studies have been carried out on the ageing of Kraft paper used in transformer insulation, especially on the production rate of the ageing by-products such as 2-furfural and CO2, which were then used as the index to infer the status of ageing of the transformer insulation. However, as this study found out, the ageing of pressboard produces the same byproducts at a much higher rate under exactly...
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