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On-line partial discharge (PD) monitoring has become the most widely applied method to determine the condition of the electrical insulation in stator windings. Presently over 12,000 large motors and generators around the world are equipped with the required sensors.
Partial discharge (PD) testing has been used for over 50 years to detect insulation problems in motor and generator stator windings. By periodically measuring the on-line PD activity, usually at least two years warning is given before the risk of stator winding failure is high - which is sufficient time to plan corrective maintenance or a rewind. Such testing is now routinely applied to more than...
Reducing maintenance cost is very important for electric power utilities in order to have the advantage in competitive power market. Besides the reliability of facilities is required to be kept in certain level. In such situation, it is necessary to know the machine condition surely in order to conduct condition based maintenance (CBM).
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