FIELD: electricity.
SUBSTANCE: in transformer winding taps switching unit the transformer is made with two branches of the split winding with low- and high-voltage taps, thyristors are joined into two valve groups with opposite conductivity directions and interconnected by two outputs, with a phase lead of the supply circuit. The valve group with one conductivity direction is coupled but its other outputs to taps of one branch of the split winding while the valve group with opposite conductivity direction is coupled to the other branch of the split winding.
EFFECT: ensuring voltage regulation under load, reducing value of switching extra currents of the transformer winding control stage.
1 dwg
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