Title :
Detection of Partial Discharges in Transformers Using Acoustic Emission Techniques
Author :
Howells, E. ; Norton, E.T.
Author_Institution :
McGraw-Edison Company Thomas A. Edison Technical Center
Abstract :
Partial discharges in transformers cause high frequency (ultrasonic) pressure pulses to propagate through the insulating media. These are similar in character to stress waves propagated in solids during crack formation (acoustic emission). The techniques involved in the detection of acoustic emission (AE) are shown to be well suited to the detection of emissions from partial discharges.
Keywords :
Acoustic emission; Acoustic propagation; Acoustic pulses; Acoustic signal detection; Frequency; Partial discharges; Power transformer insulation; Pulse transformers; Stress; UHF propagation;
Journal_Title :
Power Apparatus and Systems, IEEE Transactions on
DOI :
10.1109/TPAS.1978.354646
