DEVICE TO CONVERT ACTIVE LOAD Russian patent published in 2012 - IPC H02J3/18 

FIELD: electricity.

SUBSTANCE: device to convert an active load is proposed, comprising two power diodes oppositely connected to a phase conductor of an electric network, each of them is connected accordingly to two accumulating capacitors of identical size connected to a zero conductor of the electric network, from two serially connected power thyristors, ends of which are connected accordingly to points of connection of power diodes and appropriate accumulating capacitors, the middle point of power thyristors connection is connected together with the zero conductor of the electric network to a controlled active load, and a transformer is used to control power thyristors, the primary winding of which is connected to the electric network, its two separate secondary windings are connected to cathodes and control electrodes of the power thyristors via circuits from serially connected limiting diodes and resistors, besides, outputs of the secondary windings of the transformer connected to the control electrodes of the power thyristors, are antiphased, which determines discharge of one of accumulating capacitors to the controlled active load, when the other accumulating capacitor is charged. The device eliminates losses of power supplied along conductors of the electric network from a remote electric substation related to reactive currents, value of which at the same time is minimised. Besides, the minimisation process may be automated by application of the appropriate tracking system. Such system may be used also in low-current equipment.

EFFECT: possibility to convert a controlled active load into a complex one with a variable capacitance reactive component.

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