| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 87 === Transformer is an important component which influences in power system operation drastically. In order to reduce the possibility of malfunction, the diagnosis method to predict the incipient fault of transformers, obviously, is not only important but also valuable for application. The thesis provides two schemes of real-time monitoring about different transformer losses. In the scheme of dual-wattmeter measurement, it analyzes the varied losses under real operating situations respectively according to the varied harmonic voltage, inrush and load. Different from the traditional dissolve gas analysis method, the thesis provides a diagnosis by digital meters which integrate single chip with electronic circuit to monitor and compute the internal parameters and losses of transformers. The thesis shows the losses of transformers immediately and gets a good grip of deteriorating situation of transformers under long-time operation.
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