Abstract
Existing power facilities are being maintained through preventive maintenance in various ways. Among them, ultrasonic, thermal imaging, and wireless load monitoring have been mainly used for insulation diagnosis methods of pole transformers, which can be easily accessed in the vicinity. In this paper, in order to compensate for the disadvantages of the existing diagnosis method of pole-type transformers in power facilities, a conical diagnostic sensor was designed that can analyze electromagnetic waves radiated from partial discharge by modeling pole-type transformers and measure electromagnetic waves radiated to the outside. The characteristics of the sensor were confirmed through simulation. The proposed sensor was confirmed to have a return loss characteristic of less than -10dB in the 0.8~2.0GHz band, confirming that it can be used as a sensor for insulation diagnosis.
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