DEVICE TO CONTROL TRANSFORMER VOLTAGE UNDER LOAD Russian patent published in 2021 - IPC H02M5/12 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electrical engineering and electric power, in particular to regulators of the transformation coefficient of power transformers. The expected result is achieved by the fact that the transformer voltage control device under load, containing valve groups including bidirectional thyristor keys consisting of counter-parallel connected thyristors, some of the terminals of which are connected to the adjusting branches of the primary partitioned transformer winding, current and voltage sensors of the supply network, its outputs are connected to the control unit by bidirectional thyristor keys, while the primary partitioned transformer winding is made in the form of two separate galvanically isolated semi-windings with adjusting branches and connected to the supply network, and the terminals of bidirectional thyristor keys of valve groups, free from connection to the adjusting branches of galvanically isolated semi-windings, are connected to each other, equipped with a high-speed relay, built on the basis of an additional bidirectional thyristor key with contactor terminals with normally closed contacts connected in parallel to it, one terminal of which is connected to one of the adjusting branches of one galvanically isolated semi-winding, and its other terminal is connected to one of the adjusting branches of another galvanically isolated semi-winding of the primary partitioned transformer winding.

EFFECT: expanding the functionality of the transformer voltage control device under load in various modes of its operation.

1 cl, 1 dwg