SU559352A1 - Generator set - Google Patents

Description

(54) GENE {: RATORY INSTALLATION

The invention of fire detection in electrical engineering, and more specifically, to the installation of automatic auxiliary voltage tel- ers of self-excited synchronous generators operating on controlled silicon rectifiers (thyristors) and intended for use in stationary and mobile electrical installations of alternating current.

Known generator sets containing self-excited synchronous generator, made with. thyristor control.

Such regulators have control of the excitation power, taken from the stator, by voltage deviation (voltage channel) including a voltage transformer and a controlled bridge on thyristors with a tirisgoromir control system.

Thyristor: non-compounding controllers with satisfactory requirements for exact voltage maintenance and speed in modes characterized by abrupt changes in load

However, in the absence of compounding in established modes ko: short circuits, the excitation current decreases to zero, which eliminates the danger of ensuring the recovery of the 1H generator 1 generator after switching off the short circuit with the consumers turned on.

The closest to the technical essence of the invention is a generator set comprising a synchronous generator with self-excitation, a switch in the stator-generator circuit, a power transformer, the side winding of which is connected in series to the generator, the voltage winding to the generator voltage Controlled volt is connected (the result of the excitation winding 2.

However, the loaded state of the current channel when the generator operates in normal modes (modes of operation without short mains closures) reduces the efficiency of the controller as a whole.

Claims (2)

The aim of the invention is to increase the efficiency of the plant. These are the dosbigages VB generator set, which contains a self-excited synchronous generator, a switch in the stator-generator circuit, the current power transformer winding of which is connected in series to the generator circuit, the voltage winding on the generator voltage, and a controlled rectifier connected to the secondary winding; feeding winding The drawing is a diagram of the proposed generating set. It contains a voltage channel having a thyristor control unit 1; gov, bark bridge, made by asymmetry. control circuit on thyristors 2 and diodes 3; a voltage transformer 4 having windings a and a current channel consisting of a current winding in transformer 4 and diodes 5; current channel switching elements in short-circuit mode, including an automatic switch-off of switch 6 with contacts 7 and 8 and voltage relay 9 of contacts 10. The controller operates as follows. The voltage of the generator 11 is supplied to the controlled bridge through transformer 4 {winding a, b) The current winding in which is opened by the contacts 7 of the switch 6. For starting the generator itself, a rectifier 5 and a voltage relay 9 are used, which are triggered when the generator voltage is equal to 70-8% of the nominal value. The contacts 10 of the relay are opened when the voltage is interrupted, after which a controlled rectifier enters the operation. Thyristor operation control is performed by control unit 1. When a short-circuit mode occurs, the automatic switch 6 is activated. Contacts 7 are closed, and contacts 8 are opened, and thus secured. The current winding is turned on in the transformer 4. Simultaneously, a sharp decrease in the generator voltage leads to the fact that the relay 9 is energized and contacts 10 through the diodes 6 bypasses the thyristors 2. A working circuit of the power phase compounding system consisting of a three-winding transformer 4 and an uncontrolled rectifier 5 on diodes 3. When the short circuit is removed, the generator voltage is restored to the rated voltage, and the contacts 10 of relay 9 are closed. The circuit breaker 6 contacts 8 connects the line wire, and the contacts 7 opens the circuit of the current winding c. As a result, a working circuit of a controlled voltage control system on the thyristors is formed. The installation provides efficiency in the number of elements. The current channel only works in emergency mode, thereby providing increased reliability and efficiency of the controller. The invention includes a generator set comprising a self-excited synchronous generator, a switch in the stator-generator circuit, a power transformer, the current winding of which is connected in series to the generator circuit, the voltage winding is connected to the generator voltage, and the controlled rectifier supplying the secondary winding is connected to excitation winding, characterized in that, in order to increase the Efficiency, the open contact switch of the switch is connected in parallel with the current winding of the power transformer, and the closing with her. Sources of information taken into account in the examination: 1. USSR author's certificate number 23307O, M.Kl. And 02 R 9 / ZO, 1967, 2.Electrotechnical industry abroad, Excitation systems for synchronous generators with controlled silicon, rectifiers, M, 1963, p. 14.