SU509970A1 - Device for stabilizing asynchronous generator voltage - Google Patents

Description

(541 DEVICE FOR STABILIZATION OF VOLTAGE ASYNCHRONOUS GENERATOR

The invention relates to an automatic adjustment and can be used to automatically stabilize the voltage of an induction generator with capacitor excitation,

Devices are known for stabilizing the voltage of an induction generator with capacitor excitation, comprising measuring and throttle control elements connected to the stator winding of the generator.

The purpose of the invention is to simplify the device and reduce its weight and dimensions.

To do this, in the proposed device, the windings of the chokes of the regulating element are connected to the star via a three-phase rectifier by means of a key, connected to the measuring element through the control circuit.

The drawing shows a diagram of the proposed device.

The device contains the stator windings .1 of the generator, capacitors 2-4 of the generator’s perturbation, saturation inductors .5-7, diodes 8-13 of a rectifying bridge, controlled by

2

the key 14, the sensitive element 15 in the voltage, the load 16 of the generator.

The stator windings 1 of the induction generator include excitation capacitors 2-4. At the same points are included, at one end each, saturation throttles 5-7. The other ends of the chokes are brought to the input of a rectifying bridge, assembled, from uncontrolled diodes 8-13. A control key 14, such as a transistor, is connected to the output of the bridge. The key 14 is controlled by the sensing element 15, which is turned on by the input to the generator nlgrueki 16 phases.

The circuit of the device works according to the jy principle of compensating for the excess reactive power of capacitors that are stimulated depending on the change in the load of the gonerltor with the help of chokes nügle and.

In the outcome, the non-operating state, the key 14 is in the open (closed) state, i.e. the throttles 5.t-. 7 disconnected from ob1-- current generator. When self-excitation of the asynchronous i operator eif), the voltage is applied to the plug-in t mastered s ;; -; ment 15 and load 16. When the load reaches 16, the voltage above the nominal, the sensitive element 15 generates a signal: - opening of the transistor 14, on the windings of the inductor saturation 5-7,

diodes 8-13 of the rectifying bridge and transistor 14 receive reactive current of inductance, which compensates for the excess capacitive current of the capacitors 2-. To ensure proportionality between the voltage deviation from the nominal and the inductive current of the chokes 5-7, the control key 14 operates with a variable duration of the on state. The change of this duration is carried out with the help of a sensitive element 15, which is made according to a scheme that operates, for example, in the switching mode with pulse width modulation.

The advantage of the proposed device. is a significant simplification of the device circuit and a reduction in its weight, while at the same time improving the quality of voltage regulation in a wide range, both in the case of a change in the load magnitude and the power factor of the load. An additional advantage is the use of a torqueless sensing element and a controllable key, which ensures a sufficiently high quality of transients in the automatic voltage control system.

Claims (1)

Invention Formula A device for stabilizing the voltage of an asynchronous generator with capacitor excitation, comprising measuring and throttle control elements connected to the stator windings of the generator, characterized in that, in order to simplify the device and reduce its weight and size, the windings of the throttles of the regulating element are connected into a star through a three-phase The rectifier is connected via a control switch connected to the measuring element through the control circuit.