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In order to study on transformer oil — paper insulation aging based on multi-characteristic parameters, especially the acid in oil, this paper set up four groups of contrast experiments with # 25 transformer oil and Kraft paper. And then this paper puts forward evaluation methods and standards for the degree of insulation aging based on acid value assessment. The results show that the acid value of...
A new technique to locate the partial discharge (PD) in the transformer is presented in this article, which is based on the extended Multiple Signal Classification Method (MUSIC). The ultrasonic signal of PD is measured directly by the 6 ?? 6 ultrasonic phased array sensor and the array signal model is formed. The signal from the partial discharge source will be analyzed by the extended MUSIC algorithm...
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