SYSTEM FOR AUTOMATIC STABILISATION OF THREE-PHASE SINUSOIDAL VOLTAGE OF TRANSFORMER SUBSTATIONS Russian patent published in 2016 - IPC H02M5/00 

FIELD: electrical engineering.

SUBSTANCE: invention can be used in electrical engineering. Constant-voltage regulation system includes a booster transformer and a rheostatic-pulse control unit included into the wye cross cut of the booster transformer secondary winding connected to the secondary winding of power transformer and filtering-balancing capacitor unit. Rheostatic-pulse control unit contains two three-phase switches, shunting two series-connected heating elements, which amplify operation of the main heaters available for transformer substation consumers. Primary windings of substations' power transformers are connected to the network and balancing capacitors unit through the primary winding of the booster transformer with a phase-parallel connected to the winding unit of filter capacitors, are connected to the network and to compensating capacitors unit. Control system, including a gable voltage generator, two adders and two comparators, facilitates a two-band voltage adjustment, providing, in positive and negative area, a change of a control signal and generation of control pulses for voltage adjustment by the first and second three-phase keys, respectively.

EFFECT: technical result consists in preservation of voltage- and current sine shape during the adjustment process, increase of power coefficient and efficiency of power transformers, reduction of consumed network current.

1 cl, 1 dwg