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Principal decomposition by-products generated at various abnormalities in gas-insulated transformers

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6 Author(s)
Mukaiyama, Y. ; Chubu Electr. Co. Inc., Nagoya, Japan ; Takagi, I. ; Ishihara, H. ; Kudo, A.
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It is pointed out that the application of decomposition gas analysis based on GC and IC (gas and ion chromatography) methods provides a promising practical means of predictive diagnosis of gas-insulated transformers. As the first step of developing a diagnostic method, model tests simulating important modes of abnormalities in a gas-insulated transformer were carried out. Major components characteristic of each abnormality such as SO2 in the case of metal overheat and SO2F2 in the case of partial discharges were identified by the experiments. Attention is also paid to the effect of material differences, which is a major factor differentiating the gas-insulated transformer from other gas-insulated apparatus

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Power Delivery, IEEE Transactions on  (Volume:6 ,  Issue: 3 )