DEVICE FOR IMPROVING ENERGY EFFICIENCY OF TECHNICAL SYSTEMS OF TECHNOLOGICAL UNITS WITH SYNCHRONOUS DRIVES

A device for improving energy efficiency of technical systems of technological units with synchronous drives contains sensors of voltage, active and reactive engine power, which are connected in series through an electrical network to the engine and electric power substation; total power calculation unit. The outputs of the reactive and active engine power sensors are connected to the inputs of the total power calculation unit, and the output is connected to the first input of a first comparator, which is connected to the first input of the relay control unit. The reactive power sensor of the electric power substation or an output of a second block of constants (setting the required value of reactive power for compensation) is connected to the first input of the block for calculating the total value of the full power. A temperature sensor of engine stator windings is connected to the second input of the second comparator, the first input of which is connected to the output of a temperature constant values ​​block of the engine stator winding, and the output is connected to the second input of the relay control unit. A temperature sensor of engine cooling air is combined with the second input of the power limit calculation unit, the output of which is connected through a comparator to the first input of the relay control unit and the first relay contact is connected to the first input of the unit for determining the total value of the limiting full powers. Other inputs of the block are connected to the outputs of similar blocks for calculating the maximum power of synchronous engines engaged in the reactive power control mode, and the output is connected to the first input of the divider, the second input of which is connected to the output of the block for calculating the total value of the full power. The block for determining the total active power of all synchronous engines is connected by the first input to the output of the active power sensor of the engine and optionally to other inputs, the outputs of active power sensors from other synchronous engines participating in the reactive power control mode are connected; the pulse-phase control unit, the output of which controls the excitation modes of the engine, which engaged in the process of reactive power regulation, is connected to the output of the reactive power controller, to the input of which an adder is connected, the inputs of which are connected through the second contact of the relay to the