Protective relay apparatus

Details Protective relay apparatus Protective relay apparatus

1979-09-21

1982-03-23

Wise, Edward J.

Boots, shoes, and leggings

361 68, 361 79, 324 52, H02H 726, G06F 1556

Patent

active

043216811

ABSTRACT:
Protective relay apparatus for electric power systems which logically relates the outputs of two algorithms to provide the fastest possible trip for the conditions of the post-fault voltage and current waveforms.

REFERENCES:
patent: 3569785 (1971-03-01), Durbeck et al.
patent: 3593124 (1971-07-01), Cahen et al.
patent: 3723864 (1973-03-01), Ricard
patent: 3731152 (1973-05-01), Rockefeller
patent: 3735204 (1973-05-01), Maenicke
patent: 3758763 (1973-09-01), Nohara et al.
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patent: 3983377 (1976-09-01), Vitins
patent: 3984737 (1976-10-01), Okamura et al.
patent: 4107778 (1978-08-01), Nii et al.
patent: 4128805 (1978-12-01), Lanz
patent: 4148087 (1979-04-01), Phadke
patent: 4183072 (1980-01-01), Takagi et al.
patent: 4187525 (1980-02-01), Nagura et al.
patent: 4228476 (1980-10-01), Okita et al.
High Speed Protection of Power Systems Based on Improved Power System Models; Slemon, Robertson & Ramamoorty; CIGRE 31-09, 1968, pp. 1-15.
Real Time Calculation of Resistance and Reactance for Transmission Line Protection by Digital Computer; McInnes & Morrison; Paper No. 2938, submitted 6-25-70, The Institution of Engineers, Australia.
Fault Protection with a Digital Computer, IEEE Transactions on Power Apparatus and Systems, vol. PAS-88, No. 4, pp. 438-464, Apr. 1969, by Rockefeller.

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