SU983932A1

SU983932A1 - Device for control of high-voltage thyristorized gate

Info

Publication number: SU983932A1
Application number: SU813284454A
Authority: SU
Inventors: Георгий Борисович Черников
Original assignee: Chernikov Georgij B
Priority date: 1981-04-29
Filing date: 1981-04-29
Publication date: 1982-12-23

Description

Изобретение относитс к преобразовательной технике и может быть испо льзовано в системах управлени высо|ковольтными вентил ми.The invention relates to converter technology and can be used in control systems for high-voltage gates.

Известны устройства дл управлени последовательно соединенньми тиристорами , содержащие каскадно соединенные трансформаторы и делители напр жени на-основе конденсаторов IJ.Devices for controlling series-connected thyristors are known, comprising cascade-connected transformers and voltage dividers based on capacitors IJ.

Недостатками этих устройств вл ютс трудность обеспечени одновременного включени тиристоров и низка их помехоустойчивость.The disadvantages of these devices are the difficulty of ensuring the simultaneous switching on of the thyristors and their low noise immunity.

Наиболее близким к изобретению по достигаемому результату вл етс устройство дл управлени высоковольтным тиристорным вёнтилетл, включающим п модулей, каждый изкоторых состоит из последовательно соединенньк тиристоров и трансформатора, имеющего одну входную и выходные обмотки по количеству тиристоров, содержащее п формирователей управл ющих сигналов, каждый из которых включает Диодный мостовой выпр митель и конденсатор, изолирующий- трансформатор, входные .обмотки которого подсоединены к клеммам дл подключени сети, и формирователь стартовых импульсов на потенциале земли (.The closest to the invention in terms of the achieved result is a device for controlling high-voltage thyristor ventiltl, including n modules, each of which consists of series-connected thyristors and a transformer having one input and output windings by the number of thyristors, containing n control signal formers, each of which includes a diode bridge rectifier and a capacitor, an insulating-transformer, whose input windings are connected to the terminals for connecting the network, and forming rotor of starting impulses on earth potential (.

Недостатком известного устройства вл етс невысока надежность, а так;Же трудность обеспечени одновременс ного, включени тиристоров.A disadvantage of the known device is the low reliability, as well; the same difficulty of ensuring simultaneous switching on of the thyristors.

Целью изобретени вл етс повышение надежности устройства.The aim of the invention is to increase the reliability of the device.

Поставленна цель достигаетс тем, что в устройстве каждый из модулей {.дополнительно снабжен диодами по количеству тиристоров вентил , каждый формирователь импульсов дополнительно снабжен промежуточньлл трансфо аатором , тиристором, noporoBEW элементом и диодом, а изолирующий трансфор 5 матор снабжен дополнительной обмоткой, к которой подсоединен выход формировател стартовых импульсов, причем каждый из дополнительных диодов подсоединен анодом к клемме дл подклю20 чени катода соответствующего тиристора вентил и катодом - к клемме дл подключени управл ющего электрода , тиристора вентил и катодом - к клемме дл подключени анода тиристора The goal is achieved by the fact that in the device each of the modules {. a starting pulse former, each of the additional diodes being connected by an anode to a terminal for connecting the cathode of the corresponding thyristor of the valve and the cathode to terminal for connecting the control electrode, valve thyristor and cathode - to the terminal for connecting the thyristor anode

25 вентил через соответствующую выходную обмотку модульного трансформатора , входна обмотка которого подсоединена одним выводом к первому выходному зажиму.мостового выпр мител и 25 valve through the corresponding output winding of the modular transformer, the input winding of which is connected by one output to the first output terminal of the master rectifier and

Claims

30 simultaneously through a capacitor to the anode of the thyristor of the pulse former and to the second output pitch of the bridge, the input terminals of which are connected to the corresponding output winding of the isolating transformer via the input winding of the intermediate transformer, the output winding of which is connected to one output terminal windings of the transformer of the corresponding module, and the second output through a series-connected diode and threshold element - to the control element trodes thyristor pulse shaper. FIG. 1 is a circuit diagram of a device for controlling a high-voltage thyristor valve; in fig. 2 - timing diagrams, referring to, e; th work. A device for controlling a high-voltage thyristor valve contains modules 1. including thyristors 2 connected in series, the control electrodes of which are connected to the secondary windings of pulse transformers 3. The primary winding of pulse transformers 3 is connected to the output of a modular pulse former 4 containing a capacitive storage 5 connected through a rectifier 6 and the input winding of the intermediate transformer 7 to one of the output windings of the isolation transformer 8. The output winding is between The internal transformer 7 is connected via diode 9 and threshold element 10 to a control electrode of a thyristor 11 connected by a cathode to the input winding of pulse transformers 3 and to an anode to drive 5. The circuit of the thyristor 11 is not shown. Transformer 8 has an additional winding at the ground potential, to which a starting pulse shaper consisting of a thyristor 12 is connected, to the control electrode of which a source of primary pulses is connected, capacitive storage 13 and its charging device 14. The circuit of quenching of the thyristor 12 is not shown . The device works as follows. In the absence of pulses from the source of primary pulses, the thyristor 12 is closed and the accumulator 13 is in a charged state. There is a sinusoidal voltage on all isolation transformer B (Fig. 2- ||), but there are no control pulses on the thyristors 2. The thyristor 11 is in the closed state, because the voltage on the output winding of the transformer 8 is less than the setting of the threshold element 10. When a pulse from the source of primary pulses appears, the thyristor 12 opens and passes a short and steep accumulator through itself. 13 (Fig. 2-11). This pulse is superimposed on the voltage of the output windings of transformers 8 and 7 (Fig. 2-W), as a result of which the threshold element 10 and the thyristor 11 is triggered, turning on, forms the control pulse of module 1. The suppression of the thyristors 11 and 12 is carried out in the usual ways ( thyristor quenching unit not shown). The process is repeated after receiving the next pulse from the source of primary pulses. Thus, in the device; the same transformer transmits power to the modular pulse formers and a start pulse to provide simultaneous switching on of the modules. The use of the invention allows. increase reliability and interference-. device stability, since it does not require galvanic coupling to the thyristor anode circuits. Apparatus of the Invention A device for controlling a high-voltage thyristor gate comprising n modules, each of which consists of series-connected thyristors and a transformer having one input and output windings in terms of the number of thyristors, containing n control signal conditioners, each of which includes a diode bridge rectifier and con- A capacitor, an insulating transformer, the input windings of which are connected to terminals for connecting the network, and a driver for starting pulses on the ground potential, characterized in that, in order to increase reliability, each module additionally has diodes for the number of valve thyristors, each driver impulses are additionally provided with an intermediate transformer, thyristor, threshold element and a diode, and the isolator transformer is supplied with an additional winding to which the driver output is connected starting pulses, each of the additional diodes connected by an anode to a terminal for connecting the cathode of a corresponding valve thyristor and a cathode to a terminal for connecting a control electrode of a valve thyristor and a cathode to a terminal for connecting a valve thyristor anode through a corresponding output winding of a modular transformer, input the winding of which is connected by one terminal to the first output terminal of the bridge rectifier