SU1577069A1 - Generator source of electric energy - Google Patents

Abstract

This invention relates to electrical engineering, in particular to autonomous power generation systems. The aim of the invention is to improve the reliability of the generator source of electricity (HIE) by eliminating the excitation of an asynchronous machine (AM) when short circuits occur in the load circuit. HIE contains AM 1, the power outputs of which are connected to the AC outputs of the valve converter (VP) 8, and the low-voltage power outputs to the input of the rectifier 9. The DC outputs of the VP 8 and the rectifier 9 are interconnected via a control switch 19 of the relay element 18, and a current sensor 17 is connected to the load circuit, the output connected to the control input of the relay element 18. The invention consists in introducing a current sensor and a relay element into the HIE. 1 il.

Description

It is in electrical engineering that concerns autonomous power generation systems. The purpose of the invention is to increase the reliability of the generator power source by eliminating the excitation of an asynchronous machine when a short circuit occurs in the load circuit.

In the drawing, the electrical circuit of the generator source of electricity is represented in principle. The generator power source contains an electromechanical power source with an asynchronous machine 1, the power terminals of which are connected to the main 2-4 and low-voltage additional 5-7 power terminals of the alternating current of the electromechanical power source connected respectively to the terminals of the alternating current of the valve converter 8, made in the form of an autonomous voltage inverter, and a rectifier 9, the DC outputs 10 and 11 of which are connected to the DC outputs 12 and 13 of the same polarity of the valve interface converter and the power terminals 14 and 15 of the generator power source intended for connection to the electric power consumer 16 m. The generator source further comprises a current sensor 17 and a relay element 18 with a disconnecting control key 19, the connection between the direct current terminal 11 of the rectifier 9 and the power terminal 14 of the generator source of electrical energy, and the control switch 19 - between the terminals 11 and 12 of the constant current of the rectifier and the valve converter, the output of the current sensor 17 is connected to the control input of the relay element 18. Low-voltage additional power terminals 5-7 AC electromechanical -ethnic power source may be connected to the terminals of the first low-voltage winding 20 of the stator of the asynchronous machine connected via the second winding 21 of the stator of the asynchronous machine to the main power terminals 2-4 electron romehanicheskogo AC power source.

Electromechanical power supply containing asynchronous machine

with one stator winding, can be made with a step-down transformer, the input of which is connected to the stator winding terminals of the asynchronous machine, and the output to the low-voltage additional AC power terminals of the electromechanical power source. The terminals of the voltage sensor 22, the output of which is connected to the inverting input of the adder 23, are connected to the terminals 12 and 13 pos) of the current of the converter transformer, and the voltage source 24 is connected to the direct input 5 of the transmitter and through the converter 25 voltage to frequency and distributor-driver 26 pulses - valve control input

20 converter 8.

Generator source of electricity works as follows.

The control input of the valve converter 8 is pulsed.

25 from the output of the distributor-former 26 pulses, the frequency of which is less than the electric frequency of rotation of the rotor of the asynchronous machine. On windings 20 and 21 of the stator of an asynchronous machine

JQ is a magnetizing current, creating a rotating magnetic field that induces an emf in the stator windings. Since the frequency of rotation of the rotor is greater than the frequency of rotation of the stator field,

asynchronous machine slip is negative and it works in a generator mode. The output voltage is maintained at a predetermined level by an automatic control system consisting of a voltage source 24, a voltage sensor 22, a sum of a torus 23, and a voltage to frequency converter 25. AC power consumers can be connected in parallel to DC power consumers 16 through a voltage inverter. Rectifier 9 is locked with a high output voltage of the converter 8.

When a short circuit occurs at the output of the generator source of electric power, the output signal of the current sensor increases and the relay element 8 is triggered, and 55 the control switch 19 is opened. The valve converter is disconnected from the electricity consumers 16 and the rectifier. Straightener unlocks35

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with and supplies electricity consumers, ensuring the flow of short circuit current. The excitation of an asynchronous machine with two stator windings is carried out by a valve converter, the output voltage of which practically does not change, therefore, it is saved at the phases of the asynchronous machine and the asynchronous machine is not disengaged.

After eliminating the short circuit, the output of the current sensor 17 is reduced, and the relay element 18 returns the control key 19 to the closed state. The rectifier 9 is locked, since its output again receives a higher voltage from the output of the valve converter.

Claims (1)

Thus, the generator source of electric power operates in the output short circuit modes without de-energizing an asynchronous machine, which significantly increases the reliability of operation and also expands its field of application. Invention Formula Generator source of electricity containing electromechanical77069 cue power source with an asynchronous machine, the power terminals of which are connected to the main and low voltage Ancillary power pins of an alternating current of an electromechanical power source, connected respectively to the pins of an alternating current of a gate converter, IQ made in the form of an autonomous voltage inverter, and a rectifier, whose DC outputs are connected to the pins of the same current polarity of the gate terminal 15 the generator and with the power outputs of the generator source of electricity, characterized in that, in order to increase reliability, a current sensor and a relay element were introduced with a size repentieth a controlled key, wherein the output DC rectifier coupled to the power source terminal of the generator power through the current sensor and with the output 25 DC gate converter - via disconnecting control key, the current sensor output is connected to the control input of the relay element.