Fault detecting system for locating a fault point with a fault r

Details Fault detecting system for locating a fault point with a fault r Fault detecting system for locating a fault point with a fault r

1979-08-03

1982-01-26

Wise, Edward J.

Boots, shoes, and leggings

361 80, 324 52, G01R 3108, G06F 1556

Patent

active

043131697

ABSTRACT:
At an end (11) of a power transmission line (10), a fault detecting system monitors variations resulting from a fault in voltage and current being transmitted through the line and calculates the distance between the end and location (20) of the fault by the use of the variations and a line constant inherent to the line, such as that given by the characteristic impedance and the propagation constant, to thereby locate the fault with a sufficient accuracy by directly using the commercial frequency and without affected by the impedance that accompanies the fault. The system can calculate the fault impedance from the distance and those backward impedances seen at the end and an opposing end (12) of the line backwardly of the location of fault.

REFERENCES:
patent: 3710239 (1973-01-01), Nakamura
patent: 3931502 (1976-01-01), Kojlas
patent: 3983377 (1976-09-01), Vitins
patent: 4063166 (1977-12-01), Glavitsch et al.
patent: 4107778 (1978-08-01), Nii et al.
patent: 4128805 (1978-12-01), Lanz
patent: 4148087 (1979-04-01), Phadke

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