SU396803A1 - DEVICE FOR SELF-EXCITATION OF SYNCHRONOUS - Google Patents

Description

one

This invention relates to devices for driving synchronous generators.

Devices for self-excitation of synchronous generators are known, made according to a power phase compounding scheme with a saturation throttle connected in parallel with the rectifier input.

The saturation throttle is a cumbersome device with a significant loss of active power in the winding and the magnetic circuit, it has a very large power of control.

In order to improve the quality of regulation and reduce the power of saturation throttles, the proposed device is equipped with a thyristor, the anode of which is connected to one saturation throttle lead, the control electrode of the thyristor is connected to another lead, and a resistor is connected in series with the throttle throttle.

In order to further improve the quality of regulation, the device can be equipped with a transformer, the primary winding of which is connected to the main terminals of the generator, and the secondary - in series with a resistor.

In addition, the primary winding can be included at the input of the rectifier.

FIG. 1 is a circuit diagram of a device for self-excitation of a synchronous generator; in fig. 2 - the same with the transformer, the primary winding of which is connected to the generator terminals; in fig. 3 - the same, the primary winding is connected to the rectifier input.

To the main terminals of the synchronous generator / primary winding 2 of a step-down transformer 5 is connected, to the zero terminals - the primary winding 4 of a booster transformer 5. The secondary winding 6 of a step-down transformer 3 is connected to the rectifier 8 in series with the secondary winding 7 of the booster transformer 5 to a rectifier 8. cover 8 is connected to the rotor of the synchronous generator. At the input of the rectifier 8, parallel to it, the working winding of the 9th drosse.t is ignored. The control winding // the saturation of the saturation 10 and the regulator 12 are connected.

In parallel with the working winding 9 of the saturation droplets 10, the apode – control electrode is connected to the tyrnstor 13. In series with the working winding 9 of the saturation droplets 10 by the cathode – thyristor control electrode 13, a resistor 14 is turned on.

FIG. 2 in series with a resistor the secondary winding 15 of the transformer 16 is turned on. The primary winding 17 of the transformer 16 is connected to the main terminals of the generator /.

FIG. 3, the primary winding 17 of the transformer 16 is connected to the input of the rectifier 8.

When the synchronous generator 1 is operating, the voltage supplied to the rectifier 8 consists of two components, one of which is proportional to the voltage and the other to the current of the synchronous generator /, as a result of which any value. loads of the synchronous generator, including idling and short circuit, provide the necessary excitation current.

Additional regulation (correction) of the excitation current is provided by the saturation choke 10. In the absence of the control current from the regulator 12, the saturation choke 10 is not saturated, the current of the operating windings 9 is very low and the voltage of the rectifier input is almost entirely applied to the working windings of 9 droplets of saturation 10.

With control current from regulator 12, at a certain point in time, choke 10 is saturated, and almost all the voltage is applied to resistor 14. Under the action of this voltage, a "control electrode-thyristor cathode" current flows sufficient to unlock the thyristor 13.

In the presence of a transformer 16, the shape of the current pulse is improved (increases

slope and pulse width). Thyristor / included.

Saturation throttle 10 and resistor 14 are shunted by it. Through the thyristor 13 a current flows, which is necessary for the required reduction of the excitation current.

Subject invention

Claims (3)

1. A device for self-excitation of a synchronous generator, made according to a power phase compounding scheme with a saturation throttle connected in parallel to the rectifier input, characterized in that With a better improvement in the quality of regulation and reduction of the power of saturation throttles, it is equipped with a thyristor, the anode of which is connected to one output of saturation throttles, the thyristor adjusting electrode is the other terminal and a resistor are connected in series with the saturation inductor between the cathode and the control electrode of the thyristor. 2. The device according to claim 1, characterized in that, in order to improve the quality of regulation, it is equipped with a transformer, the primary winding of which is connected to the main terminals of the generator, and the secondary - in series with a resistor. 3. The device according to claim 1, characterized in that, with the improvement of the quality of regulation, it is equipped with a transformer, the primary winding of which is connected to the input of the rectifier, and the secondary - in series with a resistor.