Detection of high resistance faults in electrical power supply n

Details Detection of high resistance faults in electrical power supply n Detection of high resistance faults in electrical power supply n

1986-12-18

1989-01-24

Lall, Parshotam S.

Boots, shoes, and leggings

324509, 324522, 361 44, 361 82, 364483, 364578, G06F 1556, G01R 3108

Patent

active

048005096

ABSTRACT:
High resistance ground faults on a transmission line of an electrical power transmission network are detected with the aid of a device comprising a travelling wave model of the line located in measuring stations (P, Q) at either end of the line, which permits the voltage distribution along the line, seen both from P and from Q, to be obtained. A voltage .DELTA.U.sub.Qp is formed as the difference between a votlage in station P, calculated in the travelling wave model in Q, and the corresponding voltage one period earlier. A voltage .DELTA.U.sub.Pp is formed as the difference between a voltage calculated in the travelling wave model at P and the corresponding voltage one period earlier. The corresponding voltage differences .DELTA.U.sub.Pq and .DELTA.U.sub.Qq are calculated for station Q. The voltage difference .DELTA.P is then formed as the difference between .DELTA.U.sub.Qp and .DELTA.U.sub.Pp, and the corresponding .DELTA.Q is formed as the difference between .DELTA.U.sub.Pq and .DELTA.U.sub.Qq. Fault detection is obtained when .DELTA.P>.epsilon..sub.p or when .DELTA.Q>.epsilon..sub.q, where .crclbar..sub.p is the accepted voltage difference at P and .epsilon..sub.q is the corresponding value at Q.

REFERENCES:
patent: 4281386 (1981-07-01), Kondow et al.
patent: 4317151 (1982-02-01), de Mesmaeker et al.
patent: 4455612 (1984-06-01), Girgis et al.
patent: 4466071 (1984-08-01), Russell, Jr.
patent: 4528611 (1985-07-01), Udren
patent: 4529929 (1985-07-01), Berggren
patent: 4559491 (1985-12-01), Saha
patent: 4570231 (1986-02-01), Bunch
patent: 4591992 (1986-05-01), Yamaura
patent: 4689709 (1987-08-01), Isahaya
patent: 4719580 (1988-01-01), Nimmersjo

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