AE法による水車発電機固定子巻線の絶縁診断システムの開発

概要

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Abstract Establishment of Condition Based Maintenance (CBM) for hydrogenerator is very important for monitoring the insulation of stator windings. The partial discharge (PD) testing is a promising method of stator winding insulation of hydrogenerator conditions monitoring. Therefore, the on-line PD testing has been used to provide useful information to diagnose and monitor the integrity of stator winding insulation of many hydrogenerators. In this paper, we have developed insulation diagnosis system of on-line hydrogenerator stator windings using acoustic emission (AE) sensors. Using this developed system, we estimated maximum PD position on stator windings that were the weakest point of insulation of hydrogenerator. Additionally, we investigated that this system was very useful for insulation diagnosis of hydrogenerator by comparing off-line test with AE measurement.
宮崎大学の論文