FIELD: electricity.
SUBSTANCE: signals from current sensors 3 and 5 and voltage 4 come to inputs of controllers 7 and 9. Controller 7 performs the following functions: analogue-to-digital conversion of current and voltage signals; continuous calculation of valid values for active Ia and reactive Irl components of load current and voltage U by averaging for the supply mains period. Controller 9 performs the following functions: analogue-to-digital conversion of current and voltage signals; continuous calculation and recording of valid values for active Ial and reactive Irl components of load current and voltage U by averaging for the supply mains period; calculation of active r and reactive x resistance for the supply mains 1. Data on valid values for active Ial and values of active r and reactive x resistance for the supply mains via data bus 10 are delivered to controller 8, which calculates the required value of reactive current in the supply mains 
and generates preset signal for the compensating unit according to the equation Ic = Ir+Irl.
EFFECT: improved accuracy of voltage loss compensation.
3 dwg
