DEVICE FOR CONTROLLING TRANSFORMER VOLTAGE UNDER LOAD Russian patent published in 2021 - IPC G05F1/20 

FIELD: electrical engineering; electric power engineering.

SUBSTANCE: invention relates to the field of electrical engineering and electric power engineering, in particular to regulators of the transformation coefficient of power transformers. The device for controlling transformer voltage under load includes bidirectional thyristor switches [5], [6], [7], [8], [9], [10], each of which contains at least two linked counter-parallel thyristors connected by outputs to the adjustment branches of primary partitioned winding [11] of transformer [2] connected to the supply network, current sensors [16] and voltage sensors [17] connected by outputs to control unit [18]. It is equipped with two relays with normally closed contacts [14] and [15]. Primary partitioned winding [11] of transformer [2] is made in the form of two galvanically isolated partitioned half-windings [12] and [13] with adjustment branches. The outputs of thyristor keys that are free from connection to the adjustment branches of each galvanically isolated partitioned half-winding [12] and [13] are connected to nodes between which current sensor [16] is switched on. Voltage sensor [17] is connected to the adjustment branches of one of galvanically isolated partitioned half-windings [12] or [13]. The corresponding relay with normally closed contacts [14] and [15] is connected in parallel to one of the bidirectional thyristor keys in each of galvanically isolated partitioned half-windings [12] and [13].

EFFECT: an increase in the reliability of the device for controlling transformer voltage under load.

1 cl, 1 dwg