Data processing: measuring – calibrating – or testing – Testing system
Reexamination Certificate
2005-02-08
2005-02-08
Assouad, Patrick (Department: 2857)
Data processing: measuring, calibrating, or testing
Testing system
C702S109000, C702S112000, C702S115000, C702S183000
Reexamination Certificate
active
06853939
ABSTRACT:
The winding testing unit provides systems and methods for determining normal and/or abnormal characteristic signatures of same-voltage windings residing in a device, such as transformer, without the need for a comparison to past historical data. A plurality of characteristic signatures [H(f)'s] are determined for each of a plurality of windings. A plurality of differential characteristic signatures [H(f)'s] are then determined from a plurality of H(f) pairs selected from the plurality of H(f)'s. The differential H(f)'s are compared and at least one significant asymmetry is identified between the differential H(f)'s.
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Example of State-Of-The-Art Public Doman, Feb. 22, 2000, Substation Equipment Diag. Conference VIII, Comparison of Two FRA Methods to Detect Transformer Winding Movement, R.J. Denis, S.K. An, Bonneville Power Administration, Vancouver, Washington, J. Vandermaar, M. Wang, Powertech Labs, Vancouver, British Columbia.
Assouad Patrick
Georgia Tech Research Corporation
Suarez Felix
Thomas Kayden Horstemeyer & Risley, L.L.P.
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