Title :
Improved detection of power transformer winding movement by extending the FRA high frequency range
Author :
Wang, M. ; Vandermaar, A. John ; Srivastava, K.D.
Author_Institution :
Powertech Labs Inc., Surrey, BC, Canada
fDate :
7/1/2005 12:00:00 AM
Abstract :
FRA tests in the frequency range up to 10 MHz were investigated using simulations and measurements. It was found that the FRA test was more sensitive to changes in the transformer at frequencies above 1 to 3 MHz than at lower frequencies. However, the effects of the conventional test circuits mask the changes at the higher frequencies. A new test method is proposed that is effective up to at least 10 MHz.
Keywords :
frequency response; power transformer testing; transformer windings; frequency response analysis; high frequency range; power transformer winding movement; test circuit; Capacitance; Circuit testing; Frequency measurement; Power transformers; RLC circuits; Resonance; Resonant frequency; System testing; US Department of Transportation; Windings; Frequency response; modeling; transfer functions; transformers; windings;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2005.848674
