Filter for removing harmonic current from a neutral conductor

Details Filter for removing harmonic current from a neutral conductor Filter for removing harmonic current from a neutral conductor

1997-05-29

1999-06-22

Paladini, Albert W.

Electrical transmission or interconnection systems

With harmonic filter or neutralizer

323205, 323215, 333 12, 363 39, H02M 112

Patent

active

059145404

ABSTRACT:
A neutral conductor filter having three transformers. A first transformer has a primary winding connected to a first power conductor and the neutral conductor. A second transformer has a primary winding connected to a second power conductor and the neutral conductor. A third transformer has a primary winding connected to a third power conductor and the neutral conductor. The secondary windings of the transformers are connected in series with each other and a capacitor is connected in parallel with the series connected secondary windings. The capacitor is tuned with the leakage reactance of the transformers so that the impedance to zero-sequence third harmonic current is minimized.

REFERENCES:
patent: 3700959 (1972-10-01), Sakurai
patent: 5416688 (1995-05-01), Levin
patent: 5574356 (1996-11-01), Parker
patent: 5576942 (1996-11-01), Beverly et al.

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