Abstract
Aiming at the partial discharge (PD) characteristics of XLPE cable, a set of PD detection system which bases on wideband current and ultrasonic sensors is developed. The amplitude-frequency characteristics of the wideband current sensor and its influencing factors such as iron core material, permeability, turns of the coil and integrating resistor are analyzed by experiments. According to the propagating characteristics of ultrasonic, an ultrasonic PD detection system is developed and the relationships between sensitivity and the changes of distance and angle are researched. Finally, 4 typical partial discharge models are designed and the PD detection system is utilized to detect them. The sensor signals corresponding to different PD models are analyzed.
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