CS264439B1 - Connections for stabilizing the excitation control of the synchronous machine - Google Patents

Abstract

The circuit solves the problem of expanding the stability range of a synchronous machine and considerably simplifies other complex systems in the field of excitation control of synchronous machines. The circuit consists of a derivative element that creates a signal proportional to the transient deviations of the excitation current of the synchronous machine from the steady state. This signal, introduced to the input of the stabilization signal of the comparison and control element of the voltage control circuit, dampens transient events in the excitation system and expands the stability range of the synchronous machine. Furthermore, the circuit consists of a circuit of the control voltage setpoint, a feedback element of the voltage control circuit, an actuator of the excitation set of the synchronous machine, a sensor of the excitation current of the synchronous machine and an auxiliary switching element of the block switch of the synchronous machine.

Description

(57) The involvement addresses the extension of the synchronous machine stability area and greatly simplifies other complex systems in the field of synchronous machine excitation control. The circuitry consists of a differentiating member that generates a signal proportional to the transient deviations of the synchronous machine excitation current from the steady state. This signal, applied to the stabilizing signal input of the comparator and control member of the voltage control circuit, attenuates transient events in the excitation system and extends the stability range of the synchronous machine. Further, the circuitry comprises a control voltage setpoint circuit, a voltage control circuit feedback member, a synchronous machine excitation actuator actuator, a synchronous machine excitation current sensor, and an auxiliary switching element of the synchronous machine block switch.

CS 264439 Bl

BACKGROUND OF THE INVENTION The invention relates to a circuit for stabilizing the control of a synchronous machine.

Up to now, wiring processing output signals from, for example, a sensor / load angle or from active power and internal electromagnetic voltage frequencies have been used to stabilize the synchronous machine excitation control! or a stator voltage frequency sensor. The disadvantage of existing connections is their complexity.

These drawbacks are eliminated by the circuitry for stabilizing the control of the synchronous machine according to the invention, the principle being that the voltage regulator setpoint circuit is connected to the reference and control element setpoint input. a voltage control circuit whose feedback signal inputs are connected to the outputs of the voltage control circuit feedback member, and whose output is connected to the input of the actuator of the synchronous machine drive, which is connected to an exciter by its output! a synchronous machine winding, wherein the input of the voltage control comparator and control member of the voltage control circuit is connected to an output of a derivative member whose input is connected to the output of the drive current sensor of the synchronous machine. The input of the differentiator can be connected to the output of the auxiliary switching element of the synchronous machine block switch, the input of which is connected to the output of the synchronous machine excitation current sensor.

The advantage of the circuitry according to the invention lies in the extension of the stability area of the synchronous machine, the circuitry being considerably simpler than other circuitry performing a similar function.

An example of a practical embodiment of the wiring for stabilizing the synchronous machine excitation control is shown in the block diagram in the attached figure.

The circuit according to the invention is composed of a voltage regulator reference circuit 2, which is connected via its output 1.1 to a voltage regulator reference and regulator 2 reference 2.1, whose feedback inputs 2.3 are connected to the outputs 3.1 of the voltage feedback member 2 and whose the output 2.4 is connected to the input 4.1 of the actuator of the synchronous machine, which via its output 4.2 is connected to the excitation winding 2 of the synchronous machine. The input 2.2 of the voltage regulator comparator 2 is connected to output 7.2 of the derivative 2, whose input 7.1 is connected either to output 6.1 of the synchronous machine excitation current sensor 6. or to output 8.2 of the auxiliary switching element 6 of the synchronous circuit breaker block. the input 8.1 of which is then connected to the output 6.1 of the drive current sensor of the synchronous machine.

The perioperation member 2 is comprised of a series capacitor 71 and a resistor 72, the pole of the capacitor 71 not connected to the resistor 72 is connected to the input 7.1 of the derivative member 7 and the end of the resistor 72 not connected to the capacitor 71 is connected to the output 7.2 a derivative member 7.

The circuit according to the invention operates such that a signal proportional to the transient deviations of the drive current of the synchronous machine from the steady state ^is generated at the output 7.2 of the actuating member 2. This signal, applied to the stabilization signal input 2.2 of the comparator and the regulator 2 of the voltage control circuit, attenuates the transient events in the excitation system and extends the stability range of the synchronous machine.

Wiring to stabilize the synchronous machine excitation control can be used in the synchronous machine excitation controllers used in power engineering.

Claims (2)

SUBJECT OF THE INVENTION Synchronous machine excitation control wiring consisting of a synchronous machine excitation current sensor, a derivative member, an auxiliary switching element of a synchronous machine block switch, a voltage control circuit reference circuit, which is connected to a reference and control reference value input a voltage regulator circuit whose feedback signal inputs are connected to the voltage regulator feedback circuit outputs and whose output is connected to an input of a synchronous machine excitation actuator actuator output of which is connected to a synchronous machine excitation winding, characterized in that the input (2) , 2) the stabilizing signal of the comparing and regulating element (2) of the voltage control circuit is connected to the output (7.2) of the derivative element (7), whose input (7.1) is connected to the output (6.1) of the synchronous field current sensor (6) machines. Wiring for stabilizing the synchronous machine excitation control according to claim 1, characterized in that the input (7.1) of the derivative member (7) is connected to the output (8.2) of the auxiliary switching element (8) of the synchronous machine block switch. to the output (6.1) of the drive current sensor (6) of the synchronous machine which is not connected to the input (7.1) of the derivative member (7).