SU907760A1

SU907760A1 - Device for control of reversible thyristorized converter

Info

Publication number: SU907760A1
Application number: SU803211301A
Authority: SU
Inventors: Александр Григорьевич Иванов; Игорь Иванович Ушаков
Original assignee: Всесоюзный Научно-Исследовательский,Проектно-Конструкторский И Технологический Институт Релестроения
Priority date: 1980-12-04
Filing date: 1980-12-04
Publication date: 1982-02-23

Description

(54) УСТРОЙСТВО ДЛЯ УПРАВЛЕНИЯ РЕВЕРСИВНЫМ ТИРИСТОРНЫМ ПРЕОБРАЗОВАТЕЛЕМ(54) DEVICE FOR CONTROLLING REVERSIBLE THYRISTOR TRANSMITTER

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Изобретение относитс к электротехнике и может быть использовано дл управлени вентильными преобразовател ми посто нного и переменного тока, выполненными на тиристорах.The invention relates to electrical engineering and can be used to control DC / AC converter converters made on thyristors.

Известно устройство дл управлени тиристорным преобразователем, содержащие узлы фазосмещени и формировани импульсов управлени тиристорами преобразовател 1.A device for controlling a thyristor converter, comprising phase shifting units and generating thyristor control pulses of converter 1, is known.

Недостатком устройства вл етс низкое быстродействие.The disadvantage of the device is low speed.

Наиболее близким по технической сущности к изобретению вл етс устройство дл управлени преобразователем, содержащее источник синхронизирующих импульсов, генератор опорного напр жени , источник управл ющего сигнала, нуль-орган, усилитель-формирователь , блок раздельного управлени элемент ИЛИ, триггер с пр мыми входами, формирователь длительности импульсов 2.The closest in technical essence to the invention is a device for controlling a converter, which contains a source of synchronizing pulses, a reference voltage generator, a control signal source, a zero-body, a driver amplifier, a separate control unit, an OR element, a trigger with direct inputs, a driver pulse duration 2.

Недостатком устройства вл етс невысокие быстродействие и надежность.The disadvantage of the device is low speed and reliability.

Цель изобретени - повышение надежности и быстродействи .The purpose of the invention is to increase reliability and speed.

Указанна цель, достигаетс тем, что в устройство дл управлени реверсивным тиристорным преобразователем, содержащем источник синхронизирующих импульсов , генератор опорного напр жени , управл ющий орган, нуль-орган, усилительформирователь импульсов, бесконтактные ключи, логическое переключающее устройство и датчик проводимости вентилей, использован элемент И, включенный междуThis goal is achieved by using an AND element in the device for controlling a reversible thyristor converter containing a source of synchronizing pulses, a reference voltage generator, a control unit, a zero-organ, a pulse shaping amplifier, contactless switches, a logic switching device and a sensor of conductivity of gates. included between

10 нуль-органом и усилителем-формирователем импульсов, причем первый вход элемента И подключен к нуль-органу, а второй - к соответствующему пол рному выходу датчика проводимости вентилей.10 is a zero-organ and pulse-shaping amplifier, the first input of the AND element is connected to the zero-organ, and the second to the corresponding polar output of the valve conductivity sensor.

На фиг. 1 приведена принципиальна FIG. 1 shows the principal

15 схема устройства дл управлени реверсивным тиристорным преобразователем; на фиг. 2 - пример выполнени датчика проводимости вентилей с пол рными выходами. Устройство дл управлени реверсивным15 is a circuit diagram of a device for controlling a reversible thyristor converter; in fig. 2 illustrates an example of a conductivity sensor of valves with polar outputs. Device to control reversing

Claims

20 a thyristor converter contains a source of synchronizing pulses 1 connected to a generator 2 of the reference voltage, a source of a control signal 3, a null organ 4 connected to the first input of an And 5 element whose output is connected to the amplifier-driver 6 pulses, a common output of a sensor 7 the conductivity of the valves is connected to the input of the separate control unit 8, controllable switches 9 and 10 connected to the output of the shaping amplifier 6 pulses, and the second input of the And 5 element is connected to the corresponding polar output of the sensor 7 Valve ventilation. The device controls the thyristor converter 11, which contains two anti-parallel sets of thyristors, at the output of which the load 13 is turned on. The valve conductivity sensor 7 includes channels 13 and 14 consisting of optocoupler pairs 15 and 16, resistors 17-21 and transistors 22 and 23. The inputs of the opto-couples 15 and 16 are interconnected in anti-parallel and in series with the resistor 19 connected in parallel to the corresponding controlled thyristor. The outputs of the optocoupler pairs 15 and 16 are connected to the bases of transistors 22 and 23, the collectors of which are outputs of the quince (the outputs of the polarity of the voltage on the thyristors) through the elements AND-NOT 24 and 25 are connected to the inputs of the element AND-NOT 26. The outputs of these elements AND- NOT in both channels 13 and 14 of the sensor 7 of the conductivity of the valves are interconnected (the output of the presence of conductive thyristors and connected to the input of the unit 8. The device operates as follows. The source 1 of synchronizing pulses outputs at the output pulses synchronized with the network and following with the frequency of the supply network that control the operation of the reference voltage generator 2, at the output of which a sawtooth reference voltage is formed. At the moment of equality of the reference voltage and the control voltage coming from the source of the control signal 3, the zero-organ 4 instantly changes its state at the output from “O to“ 1. This signal goes to the first input of the element I 5, at the BfopOM input of which there is a signal “1 from the sensor 7 of the valve conductivity. The signal from the output of the element I is fed to the input of the amplifier of the imager 6. pulses, the output signal of the latter in the form of a high-frequency pulse train is fed to the corresponding thyristors of the converter 11. When the thyristors are turned on, the output signal at the corresponding polar output of the valve conductivity sensor 7 becomes zero, i.e., at the second input of the element, And 5 the signal is zero and the control pulses to the thyristors stop being output. At outputs in and a, from sensor 7, the signal is equal to 1 only if there are positive or negative voltages on controlled thyristors, respectively, or zero if there is a reverse polarity on the controlled thyristors or when the thyristors are conducting. At the output O of the sensor 7 of the conductivity of the valves, the signal is equal to "1 in the closed state of all thyristors or zero in the presence of conductive thyristors. In this case, the switching of the logical switching device 8 is prohibited and the output of the control pulse to the switching-on thyristor is stopped. This is an alternate control of the valves. With the inverter reversed or with a sharp change in the control signal (in a high-speed auto-adjusting system), the zero-organ 4 can switch many times in each. The half-period of the supply voltage, the output signals of the zero-organ 4 through the corresponding elements of AND 5 (as a function of the output signals of the conductivity sensor 7) and the amplifiers-formers of 6 pulses can repeatedly flow during this half-period to the corresponding valves, which ensures a clear on and thyristor reliability of his work. Thus, the invention makes it possible to increase the reliability and speed of a device for controlling a reversible converter. An apparatus for controlling a reversible thyristor converter, comprising a source of synchronizing pulses, connected via a reference voltage generator to a first input of a zero-organ, to a second input of which a control signal source is connected, a driver amplifier, connected via controllable keys to terminals for connection converter thyristors, valve conductivity sensor, the output of the presence of conductive thyristors of which through a separate control unit is connected to the control inputs of controllable keys, characterized in that, in order to increase speed and reliability, it is equipped with an element AND, and the conductivity sensor of the valves - an output of the polarity of the voltage on the corresponding thyristors connected to the first input of the element I, the second input of which is connected to the output zero -organ, the output element And is connected to the input of the amplifier shaper. Sources of information taken into account in the examination 1. AL Pisarev, L. Detkin. “Control of thyristor converters, Energie, 1975, p. 218. 2: USSR Author's Certificate No. 525210, cl. H 02 R 13/16, 1974.

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