ELECTRIC DRIVE CONTROL DEVICE FOR ADAPTIVE VOLTAGE REGULATOR UNDER LOAD Russian patent published in 2020 - IPC H02J3/12 G05F1/14 

FIELD: electrical engineering.

SUBSTANCE: device for controlling an electric drive of an adaptive voltage regulator under load includes an automatic control unit consisting of an analogue-to-digital converter (ADC), a processor, random-access memory (RAM) and read-only memory (ROM) with software, configured to generate a rational voltage level, supplied to one of the on-load tap changer (OLTC) inputs, which generates at the outputs signals for the electric drive switching, to which the electric drive position monitoring unit is connected, high-speed automatic controller (HSAC), in which, based on the obtained data from the output of the OLTC, correcting the maintained voltage level in real time for the OLTC. At that, OLTC is additionally equipped with five inputs for receiving settings of dead zone and time delay in unit of time in real time from HSAC, the electric drive position signal from the corresponding unit and the voltage level specified value from the automatic control unit, which is additionally equipped with analog inputs for signals of instant voltage level value at the end of the line, active and reactive powers to obtain preset voltage level at the output. Output of the automatic control unit is additionally equipped with a time delay unit to prevent disturbance in the power supply system due to constant changes of initial conditions. Automatic control unit is configured to perform calculation from the end of line to start coagulation method to determine energy parameters of the longest outgoing line from the OLTC, based on use of static characteristics in form of second-degree Newton polynomial coefficients. In addition, the OLTC output is equipped with an electric drive switching counter for signal feeding to the HSAC input, in which, based on the obtained data, additional adjustment of dead zone settings and time delay in unit of time in real time is carried out.

EFFECT: technical result is maintenance of rational voltage level in power supply center and provision of its automatic control considering variable load in distribution electric network.

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