| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 103 === With the electrical equipment insulation deterioration, during the breakdown period, the small-scale partial discharge will occur and leads to gradual decreasing of electricity insulation performance. With the increase of the applied voltage and duration, the frequency of occurrence of partial discharge intensity will increase, followed by arcing, result in outages of power system which is often the main cause of the failure. If the discharge phenomenon of intensity, position, patterns can be effectively monitoring, the loss of electrical equipment can be prevented. The partial discharge detecting technique is widely used for testing molded-type equipment. In this thesis the partial discharge detecting technique is used to diagnosing oil-immersed transformer is proposed.
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