Symmetrical component sequence filter

Details Symmetrical component sequence filter Symmetrical component sequence filter

1977-12-30

1979-03-27

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With phase sequence network analyzer

324108, 340658, 340658, H02H 326

Patent

active

041469135

ABSTRACT:
A symmetrical component sequence filter which provides a signal responsive to a predetermined sequence quantity of an electrical power system, while using only one phase shift other than 180 degrees. A single reactive element provides the phase shift. A single adjustable resistor calibrates the filter when the reactive element is non-precision. Selecting a precision reactive element eliminates even the single adjustment. The symmetrical component sequence filter enables both a positive and a negative sequence component to be simultaneously derived from common processing circuitry, requiring only one additional reactive element.

REFERENCES:
patent: 2854632 (1958-09-01), Lode
patent: 2897407 (1959-07-01), Morris
patent: 3154737 (1964-10-01), Hodges
patent: 3237031 (1966-02-01), Yeates et al.
patent: 3699441 (1972-10-01), Linders
patent: 3736470 (1973-05-01), Ford et al.
patent: 3938006 (1976-02-01), Gadwal et al.
patent: 3947728 (1976-03-01), Smith
patent: 3992651 (1976-11-01), Hodges
patent: 4023075 (1977-05-01), Reuter

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