Demodulator circuit for parallel AC power systems

Details Demodulator circuit for parallel AC power systems Demodulator circuit for parallel AC power systems

1982-10-07

1985-04-09

Pellinen, A. D.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Load current control

363164, 363165, H02V 316

Patent

active

045103992

ABSTRACT:
A demodulator circuit utilizes a switching demodulation technique to detect the real and reactive components of load current unbalance in a parallel source alternating current power system. A signal representing load current unbalance is selectively switched to a pair of output terminals in response to a series of pulse wave control signals which bear a phase relationship with the Thevenin equivalent voltage of one of the power sources such that the signal appearing at one of the output terminals represents the real load current component while the signal at the other output terminal represents the reactive load current component. The signals at these terminals are fed back to control the frequency and voltage magnitude of one of the power system sources to eliminate load current unbalance.

REFERENCES:
patent: 3294976 (1966-12-01), Tipton et al.
patent: 3714593 (1973-01-01), Kime et al.
patent: 3748493 (1973-07-01), Billings et al.
patent: 3879670 (1975-03-01), Fox
patent: 4061882 (1977-12-01), Dorren
patent: 4319319 (1982-03-01), Fauer et al.

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