THREE-PHASE CONTROLLED REACTOR WITH CONTROLLED SATURATION OF MAGNETIC CONDUCTOR Russian patent published in 2025 - IPC H01F27/42 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering and can be used in high-voltage electrical networks as three-phase controlled shunt reactors for reactive power compensation and automatic voltage stabilization, including in controlled reactor-transformers, reactive power sources and static reactive power compensators. Three-phase controlled reactor with controlled saturation of magnetic conductor comprises electromagnetic part with network winding, compensating winding, control winding and resistors shunting control winding, as well as saturation regulator and automatic control system. Saturation controller is made in the form of two identical semiconductor rectifiers connected in series. Saturation regulator includes diodes shunting semiconductor rectifiers. Saturation regulator is connected to the windings of the electromagnetic part by four three-phase switches, two to the compensation winding and two to the control winding. Rated current of the saturation regulator does not exceed the value of the rated current of the shunt diode: I_sr<I_d, where I_sr is the rated current of the saturation regulator; I_d is the diode rated current shunting the semiconductor rectifier. Product of the value of the resistor shunting the control winding of the electromagnetic part multiplied by the value of the rated current of the control winding, does not exceed rated voltage of three-phase switches connecting semiconductor rectifiers to outputs of control winding: 2RI_cr<U_r, where: R is the value of the resistor shunting the semiconductor rectifier; I_cr – rated current of control winding; U_r – rated voltage of three-phase switch of control winding.

EFFECT: increased reliability, efficiency and increased period of accident-free operation of controlled reactor.

1 cl, 2 dwg