SU666605A1 - Device for protecting converter from internal faults - Google Patents
Device for protecting converter from internal faultsInfo
- Publication number
- SU666605A1 SU666605A1 SU772555584A SU2555584A SU666605A1 SU 666605 A1 SU666605 A1 SU 666605A1 SU 772555584 A SU772555584 A SU 772555584A SU 2555584 A SU2555584 A SU 2555584A SU 666605 A1 SU666605 A1 SU 666605A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- current
- internal faults
- converter
- valve
- protecting converter
- Prior art date
Links
Landscapes
- Magnetically Actuated Valves (AREA)
Description
нагружен на токочувствительный орга 13, который обеспечивает режим, близкий к режиму холостого хода,loaded onto a current-sensing organ 13, which provides a mode close to idle mode,
В нормальном режиме работы преобразовател 7, когда вентили 1-6 отпираютс под действием управл югда импульсов, выходы всех трансформаторов .тока всегда попарно закорочены вентил ми моста 12 и сигнал на выходе измерительного моста 11 отсутствует . При самопроизвольном отпирании или неудачной коммутации одного из вентилей 1-6 создаетс несоответствие провод щих вентильных пар, нарушаетс шунтирующее действие моста 12 и по вл етс сигнал на выходе моста 11. При этом значение этого выходного сигнала не зависит от величины аварийного тока через самопроизвольно отпираю 1ДИЙСЯ вентиль преобразовател ,, т.е. устройство защиты обладает высокой чувствительностью и селективностью.In normal operation of converter 7, when valves 1-6 are unlocked under the action of controls of pulses, the outputs of all transformers are always shorted in pairs by the valves of bridge 12 and the signal at the output of measuring bridge 11 is absent. When spontaneous unlocking or unsuccessful switching of one of the gates 1-6, a mismatch of conductive valve pairs is created, the shunting effect of bridge 12 is disturbed and a signal appears at the output of bridge 11. At the same time, the value of this output signal does not depend on the magnitude of the emergency current unlocked converter valve, i.e. The protection device has high sensitivity and selectivity.
В аварийном режиме, например, при включенных вентил х 2 и 6 самопроизвольно открылс (или не выключилс ) вентиль 1. В этом случае дополнительно к рабочим токам возникает цепь межфазного к.з. через вентили 2 и 1. Независимо от значени тока к.з. возникает ЭДС на выходной обмотке трансформатора тока 8.In emergency mode, for example, when valves 2 and 6 are turned on, valve 1 spontaneously opened (or did not turn off). In this case, in addition to operating currents, an interfacial short circuit arises. through valves 2 and 1. Regardless of the value of the short-circuit current. EMF occurs at the output winding of the current transformer 8.
Ввиду того, что вентиль 1 открылс без воздействи управл ющего сигнала, вентиль 1 остаетс запертым и выходной ток трансформаГDue to the fact that valve 1 has opened without a control signal, valve 1 remains closed and the output current is transformed.
1 -f1 -f
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I тора тока 8 может замкнутьс лишь через измерительный мост 11 и токочувствительный орган 13. То есть устройство защиты реагирует на аварийное отпирание вентил преобразовател без замедлени и независимо от значени аварийного тока, что вл етс преимуществом данного устройства. Current torus 8 can be closed only through measuring bridge 11 and current-sensing organ 13. That is, the protection device responds to the emergency unlocking of the converter valve without slowing down and regardless of the value of the emergency current, which is an advantage of this device.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772555584A SU666605A1 (en) | 1977-12-09 | 1977-12-09 | Device for protecting converter from internal faults |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772555584A SU666605A1 (en) | 1977-12-09 | 1977-12-09 | Device for protecting converter from internal faults |
Publications (1)
Publication Number | Publication Date |
---|---|
SU666605A1 true SU666605A1 (en) | 1979-06-05 |
Family
ID=20738271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772555584A SU666605A1 (en) | 1977-12-09 | 1977-12-09 | Device for protecting converter from internal faults |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU666605A1 (en) |
-
1977
- 1977-12-09 SU SU772555584A patent/SU666605A1/en active
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