Title :
What to do after the warning of an on-line insulation diagnostic system? Off-line PD monitoring with HVAC testing!
Author :
Kübler, B. ; Hauschild, W.
Author_Institution :
HIGHVOLT Pruftechnik Dresden GmbH, Germany
Abstract :
The paper considers the relation between on-line monitoring and diagnostics on the one hand and high-voltage (HV) withstand and partial discharge (PD) on-site testing on the other. HV testing supplies the basic data (fingerprints) for diagnostics. In case of warnings by on-line diagnostic systems, off-line withstand and PD testing delivers the best possible information about defects and enables the classification of the risk. Because alternating voltage (AC) is the most important test voltage, the AC generation on site is considered. frequency tuned resonant (ACRF) test systems are best adapted to on-site conditions. They can be simply combined with PD measuring equipment. The available ACRF test systems and their application to electric power equipment -from cable systems to power transformers - is described.
Keywords :
alarm systems; gas insulated switchgear; high-voltage techniques; insulation testing; partial discharge measurement; power cable insulation; power cable testing; power transformer insulation; power transformer testing; HVAC testing; PD measuring equipment; PD testing; alternating voltage generation; cable systems; electric power equipment; frequency tuned resonant test systems; gas-insulated switchgear; off-line partial discharge monitoring; on-line insulation diagnostic system; on-line monitoring; power transformers; rotating machines; AC generators; Distributed power generation; Fingerprint recognition; Insulation; Monitoring; Partial discharges; Resonance; Resonant frequency; System testing; Voltage;
Conference_Titel :
Power Systems Conference and Exposition, 2004. IEEE PES
Print_ISBN :
0-7803-8718-X
DOI :
10.1109/PSCE.2004.1397494
