VOLTAGE CONTROL METHOD AND THREE-PHASE RECTIFIER Russian patent published in 2009 - IPC H02M7/19 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly, to solid-state hardware to be used at whatever traction substations and power transmission systems. Uncontrolled rectified voltage component is fed to high-capacity electric power accumulator and connected, via additional diode and reactor, with DC circuit bus. To expand performances of rectifier, three-phase bridge rectifier connected to the first section of secondaries is made controlled. Inputs of controlled three-phase bridge rectifiers to other taps of the transformer secondaries connected in series, and their outs are interconnected in series. High-capacity power accumulators are connected to the output of each rectifier, aforesaid accumulators being connected, via additional diodes, to reactor output. A controlled rectified voltage component is summed with uncontrolled component and varies in control zone due to rectifier thyristor control angle.

EFFECT: higher power factor and reduced nonlinear interferences.

3 cl, 1 dwg