METHOD OF CONTROLLING TRANSFORMER VOLTAGE UNDER LOAD AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC H02P13/06 G05F1/20 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the field of electric engineering and electric power industry, in particular to the power transformers transformation ratio regulators. In the method for controlling the transformer voltage under load, which includes the transformer output voltage level setting, the supply network voltage monitoring, current monitoring, supply of control pulses to bidirectional thyristor switches connected in circuits of branches of primary winding of transformer, control of each bidirectional thyristor switch is carried out together with control of controlled relay connected in parallel to bidirectional thyristor key, so that in steady state of transformer state controlled relay is set similarly to state of bidirectional thyristor switch, and in the process of controlling the transformer voltage, when the state of the bidirectional key changes from the switched-on state to the on-state, the change in the state of the controlled relay from the switched-on to the on state is delayed after the bidirectional thyristor switch is turned on, and before change of state of bidirectional key from included in switched off previously transferred controlled relay from on state to off, and in the transformer voltage under load control device, comprising at least two bidirectional thyristor keys, a controlled relay connected to the control unit is connected in parallel to each bidirectional thyristor key.

EFFECT: technical result consists in improvement of efficiency factor of transformer voltage under load.

2 cl, 2 dwg