22kV機器直結端末における部分放電検出による劣化診断法の開発

概要

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Abstract Recently, power failure were caused by dielectric breakdown occurred at the cable joint of 22kV network in a substation, because insulation deterioration diagnosis technique in electric power systems is not enough established yet. The EPR used in this experiment is the same material for insulation of actual cable splicing of the 22kV network. Partial discharge in EPR sheet was detected by two kind of sensors; AE (Acoustic Emission) sensor and VHF (Very High Frequency) antenna. The basic propagation characteristics of acoustic wave in the EPR and partial discharges in a simulated void of the EPR were measured. Next, partial discharge in cable joint was measured by AE sensor, and then discharge point could be found from the signals of three AE sensors. Last, a simple and compact AE measurement system was developed for detecting partial discharge in the actual cable of 22kV network.
宮崎大学の論文
2006-08-30