Three-phase transformer with in phase regulating winding for the

Details Three-phase transformer with in phase regulating winding for the Three-phase transformer with in phase regulating winding for the

1998-10-30

1999-11-02

Wong, Peter S.

Electricity: power supply or regulation systems

Including a transformer or an inductor

Polyphase or plural transformers

336 5, H01F 3012, H01F 3014

Patent

active

059777613

ABSTRACT:
In the case of a three-phase transformer which, per phase (U, V, W), has a primary-side winding (U.sub.PW, V.sub.PW, W.sub.PW) and a secondary-side winding (U.sub.SW, V.sub.SW, W.sub.SW), in-phase regulating windings (U.sub.L, V.sub.L, W.sub.L) are provided on each limb per phase (U, V, W). These in-phase regulating windings (U.sub.L, V.sub.L, W.sub.L) serve, by means of a tap switch 3 and a load switch 6, for in-phase regulation for the purpose of reactive volt-amperes distribution in electrical power supply networks. In addition, the in-phase regulating windings (U.sub.L, V.sub.L, W.sub.L) are operatively connected via a further load switch 5 and a further tap switch 4 to a booster transformer (2). The voltages across primary windings U.sub.B, V.sub.B, W.sub.B of the booster transformer 2 effect quadrature or phase-angle regulation of the phase voltages U.sub.P, V.sub.P, W.sub.P in the three-phase transformer 1.

REFERENCES:
patent: 2740936 (1956-04-01), Anderson
patent: 3162799 (1964-12-01), Roberts
patent: 3531714 (1970-09-01), Wolfendale
patent: 4513243 (1985-04-01), Novak et al.
patent: 4540934 (1985-09-01), Hubel
patent: 5729121 (1998-03-01), Coenders et al.
"575-MVA-Quereinstell-Transformatorensatze", Doll, et al., Elektrizitatswirtschaft, Jg. 88 (1989), Heft 6. No Month.

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