Method and system for measuring frequency deviation of low frequ

Details Method and system for measuring frequency deviation of low frequ Method and system for measuring frequency deviation of low frequ

1980-03-13

1982-12-07

Wise, Edward J.

Boots, shoes, and leggings

324 83D, G01K 2300

Patent

active

043630995

ABSTRACT:
A method and a system for frequency measuring or monitoring and particularly suitable for power system frequencies in the range of approximately 0-2 KHz is disclosed. The technique is suitable for single-phase or three-phase periodic signals. Synchronism of sampling to power systems waveform and zero crossing detection are not required. The method is particularly attractive when used in conjunction with other on-line digital processing/control tasks since the interface between the power network and the computer may be shared and the fast and accurate detection of frequency variation can be beneficially used by the rapid digital processors.

REFERENCES:
patent: 3829785 (1974-08-01), Schroder et al.
patent: 4027146 (1977-05-01), Gilmore
patent: 4093988 (1978-06-01), Scott
patent: 4150432 (1979-04-01), Sorden
patent: 4168526 (1979-09-01), Auer, Jr. et al.
patent: 4215308 (1980-07-01), Kusters
patent: 4217651 (1980-08-01), Pickering
patent: 4224568 (1980-09-01), Griner

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