Static converter transformer with harmonic filter

Details Static converter transformer with harmonic filter Static converter transformer with harmonic filter

1984-03-13

1986-04-08

Beha, Jr., William H.

Electricity: power supply or regulation systems

Including a transformer or an inductor

With compensation

336 69, 363 35, H01F 2742

Patent

active

045815739

ABSTRACT:
A better filtering effect for disturbing harmonic currents in a high-tension direct current transmission installation is described. A balancing winding is provided between a primary winding as an outer winding and a secondary winding in a 3-winding transformer with a transformer core. The distances between the balancing winding and the primary winding and the secondary winding, respectively, are selected such that the equivalent reactance of this balancing winding is equal to or less than zero. A second balancing winding can be provided as the inner winding in a series with the first balancing winding. In the case of a 4-winding transformer, two winding arrangements are provided with two parallel-connected primary windings as the outer windings, with a separate secondary winding for each and a balancing winding for each between the primary and secondary windings, the two balancing windings being connected in series.

REFERENCES:
patent: 4053820 (1977-10-01), Peterson et al.
patent: 4224660 (1980-09-01), Mohan
patent: 4308575 (1981-12-01), Mase
"Solid State Converters at Eel River Give Satisfactory Performance"; Ryder; Electrical Review; Sep. 1972.
Happoldt et al., "Elektrische Kroftwerke und Netze" 5th Edition, pp. 612-614, Springer-Verlag Berlin, Heidelberg, New York 1978.
Blume et al., "Transformer Eengineering", pp. 122 and 123, New York (1938).

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