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Deformations in windings can be diagnosed by a reliable and powerful method called sweep frequency response analysis (SFRA). In this work the deviation in the frequency response plots is derived in terms of statistical indicators. Nine statistical indicators have been used for the purpose. These indicators, then, complemented using artificial neural network approach, to derive a useful conclusion...
Taking an instrument in transformer winding distortion measurement as an example, a solution is proposed based on Samsung's S3C2410 processor and embedded Linux operating system Hardware design is introduced, and software design also is described. The application of the artificial neural network technique to the frequency response analysis method (FRA) which is used to detect transformer winding deformation...
Current measurements over a wide frequency spectrum must be performed when installing semiconductor power conversation facilities in industrial equipment. We proposed a current sensor with a wide frequency range based on the ac zero-flux method. In this paper we analyze the mechanism of operation of such sensors. In particular, we derive a theoretical formula of the operation by giving priority to...
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