Method of reducing current unbalance in a three-phase power tran

Details Method of reducing current unbalance in a three-phase power tran Method of reducing current unbalance in a three-phase power tran

1975-05-02

1977-01-18

Miller, J D

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

317 20, 307103, 317 47, H02H 722

Patent

active

040041913

ABSTRACT:
A method for reducing current unbalance in the electric system of a three-phase A.C. power transmission line operating in an incomplete phase regime using the wires of the line and transformers electrically coupled thereto. A disconnected wire of the line operating in the incomplete phase regime is grounded at one end thereof and a suitable alternating voltage source is connected at the other end thereof to increase the current flowing through the transformer neutrals, thus reducing current unbalance in the electric system. An embodiment of the invention provides for the use of a lightning protection wire rope instead of the wire in case the latter is broken.

REFERENCES:
patent: 1363707 (1920-12-01), Beard
patent: 2181321 (1939-11-01), Friedlander
patent: 2185707 (1940-01-01), McLachlan et al.
patent: 3211914 (1965-10-01), Anderson
patent: 3237031 (1966-02-01), Yeates et al.
patent: 3739188 (1973-06-01), Froehling

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