Test method and apparatus for testing a protective relay system

Details Test method and apparatus for testing a protective relay system Test method and apparatus for testing a protective relay system

1995-02-02

1996-11-19

Wieder, Kenneth A.

Electricity: measuring and testing

Electromechanical switching device

Circuit breaker

324418, 361 64, 361 66, 361 68, 361 81, H02H 726

Patent

active

055766250

ABSTRACT:
A relay test apparatus for testing a protective relay operation of a protective relay system comprises GPS receivers, respectively connected to the protective relays, each GPS receiver analyzing time data included in a signal transmitted from a satellite and outputting a time signal, simulation signal generators, respectively connected to the protective relays, each simulation signal generator generating a simulation signal and inputting the simulation signal to a corresponding protective relay, and synchronous starting units, respectively provided in the protective relays, each synchronous starting unit starting a corresponding simulation signal generator to generate the simulation signal, when time signals output from the GPS receivers coincide with a preset time at a same time.

REFERENCES:
patent: 3609523 (1971-09-01), Knox
patent: 3662219 (1972-05-01), Knox
patent: 4855861 (1989-08-01), Bergman
patent: 5168261 (1992-12-01), Weeks
IEEE Transactions on Power Delivery, vol. 8, No. 3, 1 Jul. 1993, pp. 1295-1302, "The Application of Satelite Time References to HVDC Fault Location", M. B. Dewe, S. Sankar, J. Arrillaga.
IEEE Transactions on Power Delivery, vol. 5, No. 1, 1 Jan. 1990, pp. 85-102, "Pilot Relaying Performance Analysis IEEE Committee Report", A. A. Burzese et al.
IEEE Computer Applications in Power, vol. 7, No. 1, 1 Jan. 1994, pp. 8-13, "Power System Applications for Phasor Measurement Units", R. O. Burnett, Jr., M. M. Butts and P. S. Sterlina.

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