Title :
On line PD measurements and diagnosis on power transformers
fDate :
4/1/2005 12:00:00 AM
Abstract :
On line partial discharge (PD) measurements provide information on the dielectric integrity of the high voltage insulation of oil insulated power transformers during service. These PD measurements are performed using a broadband antenna on an oil valve and UHF detection of PD signals. The sensitivity of this new detection technique is high and immunity for electromagnetic (EM) interference and corona discharges in air outside the transformer is very good. Dielectric faults can be detected in this way in an early stage of development and are classified in four categories. Automatic pattern recognition techniques of phase resolved pulse sequence (PRPS) data are very useful in risk assessment of dielectric faults.
Keywords :
broadband antennas; corona; electromagnetic interference; fault diagnosis; partial discharge measurement; pattern recognition; power transformer insulation; risk management; transformer oil; EM; automatic pattern recognition techniques; broadband antenna; corona discharges; dielectric fault detection; dielectric integrity; electromagnetic interference; fault diagnosis; high voltage insulation; oil insulated power transformers; online partial discharge measurements; phase resolved pulse sequence data; risk assessment; Antenna measurements; Dielectric measurements; Electromagnetic measurements; Oil insulation; Partial discharge measurement; Partial discharges; Power measurement; Power transformer insulation; Power transformers; UHF measurements;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2005.1430392
