SU1166657A1 - Power source of tokamak poloidal field winding - Google Patents

Abstract

TOKAMAK POLYIDAL FIELD WIND POWER SUPPLY, containing valve p-section converter, switching unit, comparator, the output of which is connected to the control input of each section of the valve converter except for one section directly connected to one of the power supply terminals and to the input of the time delay unit, command a starting device connected to the control inputs of the thyristor switches, a current measuring unit connected in series with the load, the output of which is connected to the input A comparator, characterized in that, in order to increase the speed and functionality of the circuit, the switching unit contains (p-1) thyristor switches and 2 (p-1) diode switches, the outputs of the converter sections and the thyristor switches form a series circuit; the pins of which are the positive and negative pins of the power supply, respectively, with the thyristor switches being connected between the sections of the gate converter, the diode keys being connected between the outputs (Each of the sections It is not connected to the power supply terminal and the power supply terminal of the same name according to, the output of the time delay unit is connected to the control inputs of each section of the valve converter, except directly connected to the first power supply terminal, and to the thyristor control inputs: connected to the device output ela start.

Description

This invention relates to tokamak power systems. One of the features of a poloidal power supply is the non-linear nature of the load and the need to reduce the voltage of the winding with an increase in its current. The purpose of the invention is to increase the speed and expand the functionality of the circuit by using the thyristor and diode keys installed between the converter sections. FIG. 1 is a structural diagram of the proposed device (an example of a controlled valve transformer of a body consisting of 3 sections); in fig. 2 shows the current and voltage diagrams of the winding and power circuit diagrams. The control valve converter contains sections 1,2,3, between which the thyristor switches 4 and 5 of the switching unit 6 are turned on. The positive output pins of sections 2 and 3 of the gate converter are connected to the positive terminal of the power source with diode switches 7 and 8. The negative output pins of sections 1 and 2 of the gate converter are connected to the negative output terminal of the power source with diode keys 9 and 10. In series The measuring unit 11 (for example, a DC transformer), whose output is connected to the comparator 12, is connected from the power supply terminals. The output of the latter is connected to the control inputs laziness of sections 1 and 2 of the valve converter and to the block 13 of the delay. The output of the delay unit 13 is connected to the control input of sections 1 and 2 of the valve converter. The output of the start-up device 14 is connected to the control inputs of the thyristor switches 4 and 5. The load of the power supply is winding 15 of a poloidal field. At the beginning of the formation of a pulse, the sections of the valve converter are opened, the start-up device 14 sends a pulse to open the thyristor switches 4, 5, and a current begins to increase in the winding 15 of the poloidal field. The current and voltage winding plots, as well as the power circuit 572, are shown in FIG. 2a Diode switches 7-10 are locked at the same time by voltages of sections 1-3 of the gate converter and the current does not flow through them. At time t, the winding current of the poloidal field 15 reaches 1/3 of the maximum value, and a voltage reduction is required, the comparator 12, at the input of which a signal from the current measuring unit 11 is applied, affects sections 1 and 2 of the converter converter, which translates into inverter mode . Simultaneously, a delay unit 13 is started. As soon as the polarity at the terminals of sections 1 and 2 of the converter converter changes due to the inverter mode (Fig. 2b), the thyristor switches 4 and 5, as well as sections 1 and 2 of the converter converter, cease to pass the current. Section 3 of the converter converter is connected to the winding 15 of the poloidal field via a diode switch 8. A delay unit 13, after a time interval l t t- t (required to decrease the current of sections 1 and 2 of the converter converter and thyristor switches 4 and 5, to zero, sends a signal to Opening sections 1 and 2 in a rectifying mode with an adjustment angle corresponding to the adjustment angle of section 3 of a converter converter. Now sections 1-3 of the converter converter are connected to the load in parallel via diode switches 7-10 (Fig. 2c). the poloidal field winding increases to a value three times higher than the one at which the switching occurred.If it is necessary to re-increase the voltage of the poloidal field winding when its current decreases, switching from parallel connection of sections 1-3 of the converter converter to the series one is performed by sending a pulse of the trigger 14 by thyristor keys 4 and 5 with rectifying mode of operation of sections 1-3 of the valve converter. As soon as the thyristor keys 4 and 5 are opened, the diode keys 7-10 are locked by the counter voltage of sections 1-3 of the gate converter. Similarly, the operation of the circuit is carried out with a different number of sections of the valve converter.

S

7 A 8A

Z

14

/five

Z

,

UN

7.5

15

Claims (1)

POWER SUPPLY WINDING POWER SECTION OF TOKAMAK POLYAPHONE FIELD, comprising a p-section valve converter, a switching unit, a comparator, the output of which is connected to the control input of each section of the valve converter except for one section directly connected to one of the power supply terminals and to the input of the time delay unit, command device start, connected to the control inputs of the thyristor keys, a current measurement unit connected in series with the load, the output of which is connected to the input of the computer arator, characterized in that, in order to increase the speed and functionality of the circuit., the switching unit contains (p-1) thyristor keys and 2 (p ~ 1) diode keys, the conclusions of the sections of the valve converter and thyristor keys form a serial circuit, the extreme conclusions which are respectively the positive and negative terminals of the power supply, while the thyristor switches are connected between the sections of the valve converter according to the diode switches are connected between the output of each of the sections, not associated with the output of the power supply, and the same output of the power supply according to the output of the time delay unit is connected to the control inputs of each section of the valve Converter, except directly connected to the first output of the power supply, and the output of the trigger device is connected to the control inputs of the thyristor keys.