Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1995-03-06
1997-07-15
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324528, 324532, 324533, G01R 3111
Patent
active
RE0355615
ABSTRACT:
A method and apparatus for locating an incipient fault at a point along the length of an insulated power line includes the application of an excitation voltage at an open end of the power line, and the signal pulse transmitted along the power line to the open end is passed through a high pass filter to remove the portion of the signal which is at a frequency below the excitation voltage and its harmonics. The filtered signal is amplified and passed through a band pass filter to remove a high frequency portion of the signal containing a large proportion of noise relative to the frequency of the partial discharge frequency from the incipient fault. This filtered signal is passed to a digital storage device adapted to be triggered by a signal of a predetermined amplitude, and the triggered digital storage device receives the amplified signal directly from the amplifier and stores digital data concerning amplitude and time for the peaks of the amplified signal for a predetermined period of time. The stored digital data is processed to identify the peaks reflecting the point of partial discharge in the power line.
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Bansal Rajeev
Mashikian Matthew S.
Northrop Robert B.
Palmieri Francesco
Brown Glenn W.
The University Of Connecticut
Wieder Kenneth A.
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