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US 4,766,549 AGranted
Single-ended transmission line fault locator
AssigneeElectric Power Research Institute, Inc.
InventorsEdmund O. Schweitzer, III, Masaoki Ando
Life of this patent
Estimating the term…
Abstract
A system for locating faults on a transmission line by taking measurements at only one end of the line.
Claims19
A system for locating a fault in a transmission line, comprising:
- means at one end of the transmission line for detecting transients at said one end generated by a fault;
- means at said one end for sorting said transients produced by a fault and reflected either by said one end or an end of the transmission line remote therefrom, said transients sorted by polarity and said sorting means connected to said detecting means;
- and
- means at said one end for determining the arrival times of said transients at said one end and for calculating the difference between said arrival times so as to determine the location of the fault.
1 more element
A system for location faults on a transmission line, comprising:
- means at one end of the transmission line for detecting transients at said one end generated by a fault and reflected either by said one end or an end of the transmission line remote therefrom;
- means at said one end for sorting said transients by polarity, said sorting means connected in circuit with said detecting means;
- means at said one end for determining the arrival times of said transients at said one end, said determining means connected in circuit with said sorting means;
- and
- means at said one end for calculating the difference between the arrival times of said transients, which are sorted by polarity by said sorting means so as to determine the location of the fault, said calculating means connected in circuit with said determining means.
2 more elements
A system for locating faults on a transmission line, comprising:
- means at one end of the transmission line for detecting transients at said one end generated by a fault;
- means at said one end for sorting said transients produced by a fault and reflected either by said one end or an end of the transmission line remote therefrom and said transients sorted by polarity, said sorting means connected to said detecting means;
- means at said one end for determining the respective arrival time of said transients at said one end, said determining means connected to said sorting means;
- and
- means at said one end for calculating the difference between the arrival time of a first and second or first and third transient so as to determine the location of the fault.
2 more elements
A process for locating a fault on a transmission line, comprising the steps of:
- (a) detecting fault-generated transients at one end of the transmission line reflected either by said one end or an end of the transmission line remote therefrom;
- (b) sorting said transients by polarity;
- (c) determining the arrival times of said transients at said one end;
- and
- (d) measuring the difference between the arrival times of said transients, which are sorted by polarity, at said one end so as to determine the location of the fault.
2 more elements
Dependencies are inferred from the claim text.