Power active filter employing positive sequence filtering

Details Power active filter employing positive sequence filtering Power active filter employing positive sequence filtering

1987-03-16

1988-07-12

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With phase sequence network analyzer

361 85, 367 3, H02H 326

Patent

active

047574151

ABSTRACT:
A power active filter circuit for an electric power system includes a reference generator for producing a plurality of balanced, constant amplitude, positive sequence, AC reference voltages, each being phase-locked to a corresponding phase voltage of the power system. Error signals are produced by subtracting the reference voltages from their corresponding phase voltages and a plurality of correction signals, which are proportional to the error signals, are combined with the phase voltages to produce a plurality of output voltages having substantially only a fundamental component.

REFERENCES:
patent: 3825815 (1974-07-01), Gyugyi et al.
patent: 4479160 (1984-10-01), Stacey
patent: 4669024 (1987-05-01), Stacey

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