Digital protection relay with time sync function

Details Digital protection relay with time sync function Digital protection relay with time sync function

2007-04-03

2007-04-03

Jackson, Stephen W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

C361S080000, C361S089000, C342S357490, C375S354000, C375S366000, C375S368000, C375S370000, C702S059000

Reexamination Certificate

active

10669704

ABSTRACT:
In a digital protection relay with a time sync function, the sampling timing of which is specified based on a reference timing transmitted from a time signal generator to a time sync unit, with a determination value. The time sync unit includes a reception circuit that receives a discrimination code and time data transmitted from the time signal generator, a code discrimination circuit that discriminates the reference timing on condition that the received discrimination code coincides with a desired code, a time calculation circuit that calculates the sampling timing on the basis of the discriminated reference timing and the time data, and a sampling sync circuit that specifies the sampling timing of a digital quantity of electricity on the basis of the calculated sampling timing.

REFERENCES:
patent: 4709295 (1987-11-01), Yamaura et al.
patent: 5293295 (1994-03-01), Nishitani
patent: 5786699 (1998-07-01), Sukegawa et al.
patent: 6597180 (2003-07-01), Takaoka et al.
patent: 6618648 (2003-09-01), Shirota et al.
patent: 6714148 (2004-03-01), Saga et al.
patent: 6847691 (2005-01-01), Torikoshi et al.
patent: 2002/0051271 (2002-05-01), Yoshikoshi
patent: 100 36 698 (2001-03-01), None
patent: 63-302633 (1988-12-01), None
patent: 11-191919 (1999-07-01), None
patent: 11-341706 (1999-12-01), None
patent: 2001-045646 (2001-02-01), None
patent: 2001-109781 (2001-04-01), None
patent: 2001-158936 (2001-06-01), None
patent: 2001-221874 (2001-08-01), None
patent: 2002-118952 (2002-04-01), None
Gao Houlei et al., “Development of GPS Synchronized Digital Current Differential Protection”, Power System Technology, IEEE 1998, XP010312803, pp. 1177-1182.

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