Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – For fault location
Patent
1995-09-06
1997-10-28
Karlsen, Ernest F.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
For fault location
324532, 324539, 324536, 361111, G01R 3108
Patent
active
056821000
ABSTRACT:
There is provided a system and method for locating faults in power distribution systems with complex topology, such as multi-phase urban networks (6), utilizing reliable time-delay techniques as well as a transponder (22) at a monitoring point to sense the arrival of the transient fault pulse and for transmitting a timing pulse a known time delay after sensing the arrival of the transient fault pulse and a calibration pulse a known time delay after transmitting the timing pulse. Installed along the power distribution system at key locations are receiver stations (4, 4a, 4b) capable of sensing the arrival of the transient fault pulse, timing pulse and calibration pulse and measuring the time intervals occurring between each. The location of the fault is then determined based on these timing intervals, known time delays and the known propagation velocity of the electric power cables in the power distribution system. Fault location accuracy is further enhanced by factoring rise-time effects of the sensed pulses into the time interval measurements.
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Rossi John F.
Silverberg Michael H.
Smith David Robert
Sylvester Garrett S.
Trezza Jack F.
Electric Power Research Institute Inc.
Karlsen Ernest F.
Solis Jose M.
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