Partial Discharge


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Partial Discharge

 

an electrical discharge that occurs in gaseous inclusions within electrical insulation or over contaminated or damp sections of the surface of such insulation. Partial discharges cause solid insulation to age or deteriorate. To avoid the occurrence of partial discharges, materials used as insulation are subjected to special treatment, such as vacuum drying or the impregnation of voids with an electrically strong dielectric. In addition, whenever possible, the surface of insulation is kept free of contamination and moisture.

References in periodicals archive ?
Phase Resolved Partial Discharge Analysis Due to Surface Discharges Under AC Voltage
Meanwhile, the WA is used for pattern recognition for both partial discharge types.
According to information on the website Partial Discharge Academy, sponsored by EA Technology, prediction and prevention of PD faults is based on the principle that, once present, damage resulting from PD activity inevitably increases.
stone, "A perspective on online partial discharge monitoring for assessment of the condition of rotating machine stator winding insulation", IEEE Electrical Insulation Magazine, vol.
Because different insulation defect faults have different partial discharge principle and there are strong randomness and dispersion in its phase distribution, feature frequency, and pulse magnitude, those classical feature extraction methods are not well suitable for online PD faults diagnosis.
Interpretation of wavelet analysis and its application in partial discharge detection.
The team put engineers through both theory and practical training on the PD-SGS and PD-SG1 devices, and lectured about the theory of partial discharge and the risks that occur when assets are not monitored.
Prof Glover added: "He listens to an audio signal that simply gives some basic information about whether partial discharge is present or not and with a bit of luck, the closer he is to the partial discharge the more intense it sounds.
A third company - High Voltage Partial Discharge (HVPD) Ltd - was given PS545,000, taking the total funds awarded to PS2.
Item Units August September November 2010 2010 2010 Amount of Storage ton/h 1,274,770 1,345,796 751,813 Used Full Discharge days 22 24 15 Partial Discharge days 7 4 7 Energy Saved kWh 104,893 92,688 -18,685 Energy Reduction 8.
Partial discharge (PD) is a key precursor to catastrophic failure events in high voltage distribution networks.
Dr Lee Renforth from High Voltage Partial Discharge, specialist within the field of online partial discharge testing and monitoring technology, will be discussing online partial discharge case studies for cables, switchgear, generators, motors and transformers.