Patent UA-94889-C2 (UA)
Title: Device for automatic control of voltage of networks with double-way feed
Inventor: MIROSHNYK OLEKSANDR OLEKSANDROVYCH
IPC: H02J3/12
Filed: 2010-12-23
Abstract: The invention relates to electric engineering. The device for voltage automatic control for networks with double-way feed comprises a booster transformer with an excitation winding and a series winding which is connected to the distribution line, a power unit, a control unit, a switching unit, contactors, a power steam direction control unit connected to a current transformer; first input of eighth, ninth, tenth, eleventh symistors are connected to phase A branches of the excitation winding of the booster transformer; first inputs of fourteenth, fifteenth, sixteenth and seventeenth symistors are connected to phase B branches of the booster transformer excitation winding; first inputs of twentieth, twenty first, twenty second, twenty third symistors are connected to phase C branches of the booster transformer excitation winding; symistor outputs are connected into the common point; second inputs (control electrodes) of symistors are connected to the switching unit outputs, second input of the power unit is connected to second input of the control unit; third output of the power unit is connected to second output of the switching unit, output of the control unit is connected to first input of the switching unit, the current transformer is connected to phase C of the booster transformer; current transformer outputs are connected to the power steam direction control unit. An unsymmetry-detection unit, a galvanic separation, two voltage transformer, twenty symistros, voltage transformer inputs, twenty symistors, inputs of voltage transformers are connected to phases A, B and C of the booster transformer, outputs- to galvanic separation output of the power steam direction control unit is connected to galvanic separation, inputs of power unit is connected to outputs of second voltage transformer; first, second and third outputs of galvanic separation are connected to first, second and third inputs of the unsymmetry-detection unit, output of which is connected to first input of the control unit, fourth output of galvanic separation is connected to control input third input; power unit first output is connected to fourth input of the unsymmetry-detection unit; first symistor first input is connected to first inputs of second, nineteenth and twenty fourth symistor, outputs of first and second symistors are connected to series winding of the booster transformer of A phase. Output of nineteenth symistor is connected to input of twentieth symistor, output of twenty fourth symistor is connected to input of twenty third symistor, first input of third symistor is connected to first inputs of fourth, thirteenth and eighteenth symistor, outputs of third and fourth symistors are connected to the series winding of the booster transformer of B phase, output of thirteenth symistor is connected to input of fourteen symistor, output of eighteen symistor is connected to input of seventeen symistor, first input of fifth symistor is connected to first inputs of sixth, seventh and twelfth symistors, outputs of fifth, sixth symistors are connected to series winding of the booster transformer of C phase, output of seventh symistor is connected to input of eighth symistor, output of twelfth symistor is connected to input of eleventh symistor, second inputs (control electrodes) of first, second, third, fourth, fifth, sixth, seventh, twelfth, thirteenth, eighteenth, nineteenth and twenty fourth symistors are connected to the switching unit. Capability of voltage phase control extends functional capabilities of the device.