SU109966A1 - Apparatus for distributing reactive loads between parallel-running electric generators - Google Patents

Description

To automatically distribute reactive loads between synchronously operating synchro generator, generators use devices based on equalizing the voltage applied to the windings of their rotors.

The proposed device is more advanced than the known devices of this kind, since it eliminates the possibility of current flow in the circuits of the circuit during steady state operation of the generators and increases as a result of this reliability. This is achieved by the fact that the same ends of the rotor windings of all generators are connected to the same ends of the excitation windings of the engines of the installation devices of the generator excitation system (for example, shunt rheostats in the excitation circuit) so that when the voltage on the rotor of one of the generators increases, the current in the excitation winding The motor of its installation device ensures that the shaft moves this device in the direction of decreasing the voltage applied to the rotor winding.

The drawing shows a schematic diagram of the proposed device.

One of the same ends of the rotor windings 1 of parallel-running generators are interconnected to a common point A, while others are connected to the corresponding ends of the same name windings of 2 motors of installation devices of the generator excitation system, for example, shunt resistors in the excitation circuit, installation devices of automatic regulation voltages, etc. The free ends of the excitation windings of these motors are also interconnected to a common point B. The anchors of the 3 motors are powered by constant voltage point.

With equal voltages applied to all the windings of the rotors, the currents in the windings 2 are equal to zero. If the voltages applied to the rotor windings are unequal, an equalizing current arises in the circuit, which is directed so that the m. The excitation winding 2 of the engine of the generator installation with a higher rotor voltage caused the vision of the core 3 to the side corresponding to a decrease in the voltage on the winding / of this generator. In this way, the voltages applied to the windings / generators are equalized, which, at the same temperature of these windings, ensures the equality of their currents, and at unequal temperatures, loading the colder generator.

If necessary, the distribution of reactive loads according to a different law, the degree of loading of each generator can be set by including windings of generator rotors into the equalization circuit not directly, but through potentiometers (not shown in the drawing).

The second excitation windings 4 of the engine 2 can be switched on at the output of the central regulator 5 (setting control) of the voltage. In this case, simultaneously with the automatic distribution of reactive loads, a13 automatic regulation of the voltage of the generators can also be carried out.

Subject invention

A device for distributing reactive loads between parallel-running electric generators by equalizing their rotors, characterized in that, in order to increase the reliability of its operation by eliminating current flow in its circuit during steady state operation of the generators, the same ends of the rotor windings of all generators are connected to the same the ends of the excitation windings of the motors of the installation devices of the excitation system of the generators (for example, shunt resistors in the excitation circuit) thus so that when the rotor voltage of one of the generators is increased, the current in the motor excitation winding of its installation device causes the motor to rotate in the direction of decreasing rotor voltage, the free ends of these rotor windings and motor excitation windings are connected to each other and the motors measles are fed from a constant voltage source wives