EP0800702B1 - Process and circuit arrangement for a commutation and turning-off system of a quick make-and-break - Google Patents
Process and circuit arrangement for a commutation and turning-off system of a quick make-and-break Download PDFInfo
- Publication number
- EP0800702B1 EP0800702B1 EP95942718A EP95942718A EP0800702B1 EP 0800702 B1 EP0800702 B1 EP 0800702B1 EP 95942718 A EP95942718 A EP 95942718A EP 95942718 A EP95942718 A EP 95942718A EP 0800702 B1 EP0800702 B1 EP 0800702B1
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- European Patent Office
- Prior art keywords
- commuting
- discharge
- thyristor
- thyristors
- parallel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
- H01H9/541—Contacts shunted by semiconductor devices
- H01H9/542—Contacts shunted by static switch means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/59—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
- H01H33/596—Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle for interrupting dc
Definitions
- the invention relates to a method according to the preamble of claim 1 and circuit arrangements according to the preamble of claims 2 to 4 for a commutation and extinguishing device for a metallic rapid breaker in one Rectifier substation for a DC traction power supply.
- Hybrid switches are known, such as are described in DE-A-3 735 009 or in EP-A-0 184 566, the disadvantage of which is that the capacitor used, both in the switching state, is both drive and Extinguishing capacitor and the capacitance is short-circuited by the bridge circuit (both current directions for the metallic contact).
- GB-A-1 206 696 (closest prior art) describes a hybrid switch in which firing pulses for the commutation thyristor or shunt thyristor are output at the same time as the switching command for the quick breaker, so that the current commutates from the switching path into the commutation branch . Only at a later point in time, when the switching path is open, are quenching thyristors fired, so that the voltage of the quenching capacitor blocks the commutation thyristor and the commutation current is extinguished.
- the task is to specify a method and such circuits choose that the extinguishing capacity is only switched on when an immediate Short-circuit load of the capacitor no longer occurs, the entire charge of the Capacitor for quenching the commutation current is available and the commutation and quenching device is also used for route testing can be.
- this object is based on the prior art according to GB-A-1 206 696 solved by the characterizing features of claim 1.
- the corresponding controllable valves in the Commutation branch ignited, so that a current flow between the busbar and the route is made possible and by a current transformer this current measured in the line outlet, the size of which is a measure of the State of the route.
- a circuit arrangement according to the invention of a commutation and quenching device in a rectifier substation for traction current supply which is arranged in parallel with a quick breaker, which has a separate drive, consists of a Grford bridge made of controllable bridge valves, in the diagonal branch of which a commutation thyristor is arranged which the quenching branch, consisting of an quenching capacitor, a quenching thyristor and a coupling diode, is connected in parallel.
- this can be arranged in the commutation branch between the cathode of the coupling diode and the anode of a bridge valve and can be short-circuited by a contactor in the operating state.
- the rapid interrupter is driven by a separate drive, which receives its energy preferably from a separate electrolytic capacitor.
- the connection between the quenching capacitor and the anode of the coupling diode can be connected to the ground in order to ensure that the quenching capacitor is recharged in the event of an empty shutdown.
- a further circuit arrangement according to the invention is defined in claim 3.
- a resistor can be connected in series for each current direction in the commutation branch. To carry out distance tests with a conventional test resistor, this is arranged in the commutation branch between the cathode of the coupling diode and the anode of a bridge valve and short-circuited in the operating state by a contactor. To ensure that the quenching capacitor is recharged in the event of an empty shutdown, the connection between the quenching capacitor and the anode of the coupling diode is preferably connected to the ground.
- a third circuit arrangement according to the invention is defined in claim 4.
- the connection point between the cathodes of the second quenching thyristor and the second commutation thyristor and the anodes of the third and fourth bridge valve is preferably connected to the ground via a free-wheeling diode.
- a resistor can be connected in series for each inner short-circuit branch in the commutation branch. Further advantageous embodiments of the invention can be found in the subclaims.
- the exemplary embodiments relate to traction current systems in which the railway earth BE is at minus potential.
- railway earth lies If the potential is positive, the technical teaching is to be applied analogously.
- the rapid interrupter being designed with a separate drive.
- a current flows from the busbar SS to the ST section or as reverse current in the opposite direction from the ST section to the busbar SS.
- the bridge valves 1 to 4 and the commutation thyristor become active Thk ignited for a certain period of time.
- the rapid interrupter SU has a separate drive with its own energy supply, e.g. B. an electrolytic capacitor. So that the energy of the quenching capacitor C is used exclusively for quenching the commutation thyristor Thk.
- the current commutates when the contact of the quick breaker SU opens via the isolating contacts Hs via the bridge valves 1, 3 and Thk from the busbar SS to the ST section or from the ST section to the busbar SS via the bridge valves 2, 4 and Thk. Since there are no further ignition pulses, the other two bridge valves 2 and 4 or 1 and 3 block, so that no current flows through them.
- the quenching thyristor Thl is ignited, so that the commutation thyristor Thk is quenched by the voltage of the quenching capacitor C via the coupling diode D and at the same time there is an after-quenching of the switching path of the quick breaker SU and thus the current flow from the busbar SS to the path ST or from line ST to busbar SS becomes zero. If there is an empty shutdown, the quenching capacitor C is reloaded via the connection to the rail ground BE.
- the commutation branch is triggered by igniting the Commutation thyristor Thk and the bridge valves 1 to 4 turned on.
- the Current transformer W the current in the line outlet is measured, its size Represents measure of the state of the route ST. Should an impermissibly high current are present, then the commutation thyristor Thk by igniting the Quenching thistor Thl and the discharge of the quenching capacitor C instantaneously switched off.
- a route test with a conventional resistor can be done with the also implement the solution according to the invention by between the connection points A and B a test resistor Rp is arranged.
- the test resistor Rp is in the operating state of the commutation and quenching device by a Contactor S bridges.
- This circuit arrangement will preferably applied when the route test with an existing one Test resistance should be carried out conventionally.
- the commutation and quenching device can also be operated directly on the DC Vehicle can be applied to switches and contactors.
- FIG. 2 describes a commutation and quenching device for a quick breaker with an integrated drive and a separate drive capacitor.
- the bridge valves 1, 2, 3, 4 are designed as diodes, since the ohmic resistors R1 and R2 arranged in the bridge branches prevent a short-circuit load on the quenching capacitor C.
- a current flows from the busbar SS to the line ST or as reverse current in the opposite direction from the line ST to the busbar SS.
- the drive capacitor Ca discharges, so that the drive coils open the quick breaker.
- the commutation thyristor Thk is ignited for a certain period of time.
- the current commutates when the contact of the quick breaker SU is opened via the isolating contacts Hs, the bridge valves 1, 3 and the commutation thyristor Thk from the busbar SS to the section ST or from the section ST to the busbar SS via the bridge valves 2, 4 and the commutation thyristor Thk.
- a parallel diode Dp is arranged in parallel with the drive capacitor Ca, which is preferably an electrolytic capacitor, so that a commutation current which has not yet been quenched can flow for a sufficiently long time.
- a freewheeling diode Dsp is connected in parallel with the drive coils of the quick breaker SU.
- the quenching thyristor Thl is ignited, so that the commutation thyristor Thk is quenched by the voltage of the quenching capacitor C via the coupling diode D and the current flow from the busbar SS to the ST line or from the ST line to the busbar SS becomes zero. If there is an empty shutdown, the quenching capacitor C is reloaded via the connection to the rail ground BE.
- the commutation branch is triggered by igniting the Test thyristor Thp switched on.
- the current is measured at the current transformer W, the size of which is a measure of the state of the line ST.
- the test thyristor Thp is triggered by the ignition of the Quenching thyristor Thl and the discharge of the quenching capacitor C via the coupling diode D immediately deleted and the test current switched off.
- FIG. 3 describes a commutation and quenching device of a rapid breaker with an integrated drive and use of the quenching capacitor as a drive capacitor.
- a current flows from the busbar SS to the line ST or as reverse current in the opposite direction from the line ST to the busbar SS.
- the bridge valves 1, 2, 3, 4 are also in this embodiment of the commutation and quenching device designed as diodes, since in this case the inductors L1 and L2 arranged in the bridge branches as current limiting chokes prevent a short-circuit load on the quenching capacitor C.
- the capacitor C discharges, so that the drive coils open the quick breaker SU.
- the commutation thyristors Thk1 and Thk2 are fired for a certain period of time.
- the current commutates when the contact of the quick breaker SU opens via the isolating contacts Hs, the bridge valves 1, 3, the commutation thyristors Thk1 and Thk2 and the capacitor C from the busbar SS to the ST section or from the ST section to the SS busbar via the bridge valves 2, 4, the current limiting chokes L1, L2 and the commutation thyristors Thk1, Thk2 and the capacitor C.
- a coupling diode D is connected in parallel with the drive coils of the quick breaker SU.
- the quenching thyristors Thl1, Thl2 are ignited, so that the capacitor C reloaded.
- the coupling diode D and the two quenching thyristors Thl1, Thl2 the two commutation thyristors Thk1, Thk2 deleted and the current flow from the busbar SS to route ST or from route ST to busbar SS becomes zero.
- a test branch is created by igniting the first Quenching thyristor Thl1 and the second commutation thyristor Thk2 switched on, so that a current flows from the busbar SS to the route ST can.
- the current in the line outlet is measured Size represents a measure of the state of the route ST. Should be an inadmissible high current, then the first quench thyristor Thl1 by ignition of the third quenching thistor Thl3 and the discharge of the quenching capacitor C immediately deleted and the test current switched off.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Rectifiers (AREA)
- Selective Calling Equipment (AREA)
- Power Conversion In General (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß Oberbegriff von Anspruch 1 und Schaltungsanordnungen nach dem Oberbegriff der Ansprüche 2 bis 4 für eine Kommutierungs-
und Löscheinrichtung für einen metallischen Schnellunterbrecher in einem
Gleichrichter-Unterwerk für eine Gleichstrom-Bahnstromversorgung.The invention relates to a method according to the preamble of
Es sind Hybridschalter bekannt, wie sie in der DE-A-3 735 009 bzw. in der
EP-A-0 184 566 beschrieben sind, deren Nachteil darin besteht, daß der eingesetzte
Kondensator zeitgleich, in einem Schaltzustand, sowohl Antriebs- als auch
Löschkondensator ist und zudem die Kapazität durch die Brückenschaltung (beide
Stromrichtungen für den metallischen Kontakt) kurzgeschlossen ist.
In der GB-A-1 206 696 (nächsthommender Stand der Technik) ist ein Hybridschalter beschrieben, bei dem zeitgleich mit
dem Schaltbefehl für den Schnellunterbrecher Zündimpulse für den Kommutierungsthyristor
bzw. Shuntthyristor ausgegeben werden, so daß der Strom von der
Schaltstrecke in den Kommutierungszweig kommutiert. Erst zu einem späteren
Zeitpunkt, wenn die Schaltstrecke geöffnet ist, werden Löschthyristoren gezündet,
so daß die Spannung des Löschkondensators den Kommutierungsthyristor sperrt
und der Kommutierungsstrom verlöscht.Hybrid switches are known, such as are described in DE-A-3 735 009 or in EP-A-0 184 566, the disadvantage of which is that the capacitor used, both in the switching state, is both drive and Extinguishing capacitor and the capacitance is short-circuited by the bridge circuit (both current directions for the metallic contact).
GB-A-1 206 696 (closest prior art) describes a hybrid switch in which firing pulses for the commutation thyristor or shunt thyristor are output at the same time as the switching command for the quick breaker, so that the current commutates from the switching path into the commutation branch . Only at a later point in time, when the switching path is open, are quenching thyristors fired, so that the voltage of the quenching capacitor blocks the commutation thyristor and the commutation current is extinguished.
Die Aufgabe besteht darin, ein Verfahren anzugeben und solche Schaltungen zu wählen, daß die Löschkapazität erst dann zugeschaltet wird, wenn eine unmittelbare Kurzschlußbelastung des Kondensators nicht mehr auftritt, die gesamte Ladung des Kondensators zur Löschung des Kommutierungsstromes zur Verfügung steht und die Kommutierungs- und Löscheinrichtung auch noch zur Streckenprüfung benutzt werden kann.The task is to specify a method and such circuits choose that the extinguishing capacity is only switched on when an immediate Short-circuit load of the capacitor no longer occurs, the entire charge of the Capacitor for quenching the commutation current is available and the commutation and quenching device is also used for route testing can be.
Erfindungsgemäß wird diese Aufgabe ausgehend vom Stand der Technik nach GB-A-1 206 696
durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. According to the invention, this object is based on the prior art according to GB-A-1 206 696
solved by the characterizing features of
Zur Prüfung der Strecke werden die entsprechenden steuerbaren Ventile im Kommutierungszweig gezündet, so daß ein Stromfluß zwischen der Sammelschiene und der Strecke ermöglicht wird und durch einen Stromwandler wird dieser Strom im Streckenabgang gemessen, dessen Größe ein Maß für den Zustand der Strecke darstellt.To check the route, the corresponding controllable valves in the Commutation branch ignited, so that a current flow between the busbar and the route is made possible and by a current transformer this current measured in the line outlet, the size of which is a measure of the State of the route.
Bei Überschreiten eines vorgegebenen Stromwertes wird durch das Zünden des/der Löschthyristors/en und die Entladung des Löschkondensators der Kommutierungs- bzw. der Prüfthyristor gelöscht und somit der Strom im Kommutierungszweig augenblicklich unterbrochen.If a specified current value is exceeded, the ignition of the quenching thyristor (s) and the discharge of the quenching capacitor Commutation or test thyristor deleted and thus the current in the commutation branch immediately interrupted.
Eine erfindungsgemäße Schaltungsanordnung einer Kommutierungs- und Löscheinrichtung
in einem Gleichrichter-Unterwerk zur Bahnstromversorgung die parallel
zu einem Schnellunterbrecher, der über einen separaten Antrieb verfügt,
angeordnet ist, besteht aus einer Grätz-Brücke aus steuerbaren Brückenventilen,
in deren Diagonalzweig ein Kommutierungsthyristor angeordnet ist, zu welchem
der Löschzweig, bestehend aus einem Löschkondensator, einem Löschthyristor
und einer Ankoppeldiode, parallel geschaltet ist.
Zur Realisierung von Streckenprüfungen mit einem konventionellen Prüfwiderstand
kann dieser im Kommutierungszweig zwischen der Kathode der Ankoppeldiode
und der Anode eines Brückenventils angeordnet und im Betriebszustand
durch ein Schütz kurzgeschlossen sein.
Der Antrieb des Schnellunterbrechers erfolgt durch einen separaten Antrieb, der
seine Energie vorzugsweise durch einen gesonderten Elektrolytkondensator erhält.
Damit bei einer Leerabschaltung die Umladung des Löschkondensators gewährleistet
wird, kann die Verbindung zwischen Löschkondensator und der Anode der
Ankoppeldiode mit der Bahnerde verbunden sein.A circuit arrangement according to the invention of a commutation and quenching device in a rectifier substation for traction current supply which is arranged in parallel with a quick breaker, which has a separate drive, consists of a Grätz bridge made of controllable bridge valves, in the diagonal branch of which a commutation thyristor is arranged which the quenching branch, consisting of an quenching capacitor, a quenching thyristor and a coupling diode, is connected in parallel.
To carry out distance tests with a conventional test resistor, this can be arranged in the commutation branch between the cathode of the coupling diode and the anode of a bridge valve and can be short-circuited by a contactor in the operating state.
The rapid interrupter is driven by a separate drive, which receives its energy preferably from a separate electrolytic capacitor.
The connection between the quenching capacitor and the anode of the coupling diode can be connected to the ground in order to ensure that the quenching capacitor is recharged in the event of an empty shutdown.
Eine weitere erfindungsgemäße Schaltungsanordnung wird in Anspruch 3 definiert. A further circuit arrangement according to the invention is defined in claim 3.
Zur Begrenzung des inneren Kurzschlußstromes können im Kommutierungszweig,
für jede Stromrichtung je ein Widerstand in Reihe geschaltet sein.
Zur Realisierung von Streckenprüfungen mit einem konventionellen Prüfwiderstand
wird dieser im Kommutierungszweig zwischen der Kathode der Ankoppeldiode
und der Anode eines Brückenventils angeordnet und im Betriebszustand
durch ein Schütz kurzgeschlossen.
Damit bei einer Leerabschaltung die Umladung des Löschkondensators gewährleistet
wird, wird vorzugsweise die Verbindung zwischen Löschkondensator und der Anode der
Ankoppeldiode mit der Bahnerde verbunden.To limit the internal short-circuit current, a resistor can be connected in series for each current direction in the commutation branch.
To carry out distance tests with a conventional test resistor, this is arranged in the commutation branch between the cathode of the coupling diode and the anode of a bridge valve and short-circuited in the operating state by a contactor.
To ensure that the quenching capacitor is recharged in the event of an empty shutdown, the connection between the quenching capacitor and the anode of the coupling diode is preferably connected to the ground.
Eine dritte erfindungsgemäße Schaltungsanordnung wird in Anspruch 4 definiert.
Der Verbindungspunkt zwischen den Kathoden des zweiten Löschthyristors und
des zweiten Kommutierungsthyristors sowie den Anoden des dritten und vierten
Brückenventils ist vorzugsweise über eine Freilaufdiode mit der Bahnerde verbunden.
Zur Begrenzung des inneren Kurzschlußstromes können im Kommutierungszweig,
für jeden inneren Kurzschlußzweig je ein Widerstand in Reihe geschaltet sein.
Weitere vorteilhafte Ausgestaltungen der Erfindung sind den Unteransprüchen zu
entnehmen.A third circuit arrangement according to the invention is defined in
The connection point between the cathodes of the second quenching thyristor and the second commutation thyristor and the anodes of the third and fourth bridge valve is preferably connected to the ground via a free-wheeling diode. To limit the inner short-circuit current, a resistor can be connected in series for each inner short-circuit branch in the commutation branch.
Further advantageous embodiments of the invention can be found in the subclaims.
Die Erfindung soll anhand von Ausführungsbeispielen näher erläutert werden. Die dazugehörigen Zeichnungen stellen dar:
- Fig. 1
- Kommutierungs- und Löscheinrichtung für Schnellunterbrecher mit separatem Antrieb
- Fig. 2
- Kommutierungs- und Löscheinrichtung für Schnellunterbrecher mit integriertem Antrieb und separatem Antriebskondensator
- Fig. 3
- Kommutierungs- und Löscheinrichtung für Schnellunterbrecher mit integriertem Antrieb
- Fig. 1
- Commutation and quenching device for quick breakers with separate drive
- Fig. 2
- Commutation and quenching device for quick breakers with integrated drive and separate drive capacitor
- Fig. 3
- Commutation and quenching device for quick breakers with integrated drive
Die Ausführungsbeispiele beziehen sich auf Bahnstromanlagen, bei denen die Bahnerde BE auf Minuspotential liegt. Für die umgekehrte Polung, Bahnerde liegt auf Pluspotential, ist die technische Lehre analog anzuwenden.The exemplary embodiments relate to traction current systems in which the Railway earth BE is at minus potential. For the reverse polarity, railway earth lies If the potential is positive, the technical teaching is to be applied analogously.
In der Fig. 1 ist eine Ausführung der Kommutierungs- und Löscheinrichtung dargestellt,
wobei der Schnellunterbrecher mit einem separaten Antrieb ausgeführt ist.
Im Betriebszustand, bei geschlossenem Schnellunterbrecher SU fließt ein Strom von
der Sammelschiene SS zur Strecke ST oder als Rückstrom in umgekehrter Richtung
von der Strecke ST zur Sammelschiene SS. Mit der Auslösung des Befehls zum
Öffnen des Schnellunterbrechers SU werden die Brückenventile 1 bis 4 und der
Kommutierungsthyristor Thk über eine bestimmte Zeitspanne gezündet. Der
Schnellunterbrecher SU verfügt über einen separaten Antrieb mit eigener
Energieversorgung, z. B. einen Elektrolytkondensator., so daß die Energie des
Löschkondensators C ausschließlich zur Löschung des Kommutierungsthyristors
Thk genutzt wird. Entsprechend der Stromrichtung kommutiert der Strom beim
Öffnen des Kontaktes des Schnellunterbrechers SU über die Trennerkontakte Hs
über die Brückenventile 1, 3 und Thk von der Sammelschiene SS zur Strecke ST
bzw. von der Strecke ST zur Sammelschiene SS über
die Brückenventile 2, 4 und Thk. Da weitere Zündimpulse ausbleiben, sperren die
beiden anderen Brückenventile 2 und 4 bzw. 1 und 3, so daß über diese kein
Stromfluß zustande kommt.
Nach einer voreingestellten Zeit wird der Löschthyristor Thl gezündet, so daß der
Kommutierungsthyristor Thk durch die Spannung des Löschkondensators C über
die Ankoppeldiode D gelöscht wird und zugleich noch eine Nachlöschung der
Schaltstrecke des Schnellunterbrechers SU erfolgt und somit der Stromfluß von
der Sammelschiene SS zur Strecke ST bzw. von der Strecke ST zur
Sammelschiene SS zu Null wird.
Sollte eine Leerabschaltung vorliegen, so wird der Löschkondensator C über die
Verbindung mit der Bahnerde BE umgeladen.1 shows an embodiment of the commutation and quenching device, the rapid interrupter being designed with a separate drive. In the operating state, with the rapid interrupter SU closed, a current flows from the busbar SS to the ST section or as reverse current in the opposite direction from the ST section to the busbar SS. When the command to open the quick interrupter SU is triggered, the
After a preset time, the quenching thyristor Thl is ignited, so that the commutation thyristor Thk is quenched by the voltage of the quenching capacitor C via the coupling diode D and at the same time there is an after-quenching of the switching path of the quick breaker SU and thus the current flow from the busbar SS to the path ST or from line ST to busbar SS becomes zero.
If there is an empty shutdown, the quenching capacitor C is reloaded via the connection to the rail ground BE.
Für die Prüfung der Strecke wird der Kommutierungszweig durch das Zünden des
Kommutierungsthyristors Thk und der Brückenventile 1 bis 4 eingeschaltet. Am
Stromwandler W wird der Strom im Streckenabgang gemessen, dessen Größe ein
Maß für den Zustand der Strecke ST darstellt. Sollte ein unzulässig hoher Strom
vorliegen, dann wird der Kommutierungsthyristor Thk durch das Zünden des
Löschthyristors Thl und die Entladung des Löschkondensators C augenblicklich
abgeschaltet.To check the route, the commutation branch is triggered by igniting the
Commutation thyristor Thk and the
Eine Streckenprüfung mit einem herkömmlichen Widerstand läßt sich mit der
erfindungsgemäßen Lösung auch realisieren, indem zwischen den Anschlußpunkten
A und B ein Prüfwiderstand Rp angeordnet wird. Der Prüfwiderstand Rp
wird im Betriebszustand der Kommutierungs- und Löscheinrichtung durch ein
Schütz S überbrückt. Zur Durchführung der Streckenprüfung wird zusätzlich zur
Zündung der Brückenventile 1 bis 4 und des Kommutierungsthyristors Thk auch
noch das Schütz S stromlos geöffnet. Diese Schaltungsanordnung wird
vorzugsweise angewendet, wenn die Streckenprüfung mit einem vorhandenen
Prüfwiderstand konventionell durchgeführt werden soll.A route test with a conventional resistor can be done with the
also implement the solution according to the invention by between the connection points
A and B a test resistor Rp is arranged. The test resistor Rp
is in the operating state of the commutation and quenching device by a
Contactor S bridges. In addition to the
Ignition of the
Sollte die Streckenprüfung mehrfach negativ sein und nachdem kein Strom mehr fließt werden die Trennkontakte Hs geöffnet, so daß eine galvanische Trennung zwischen Sammelschiene SS und Strecke ST besteht. Should the route test be negative several times and after no more electricity the isolating contacts Hs are opened, so that galvanic isolation exists between busbar SS and section ST.
Die Kommutierungs- und Löscheinrichtung kann auch direkt auf dem gleichstrombetriebenen Fahrzeug bei Schaltern und Schützen angewendet werden.The commutation and quenching device can also be operated directly on the DC Vehicle can be applied to switches and contactors.
In der Fig. 2 wird eine Kommutierungs- und Löscheinrichtung für einen Schnellunterbrecher
mit integriertem Antrieb und separatem Antriebskondensator
beschrieben. Bei dieser Ausführungsform der Kommutierungs- und Löscheinrichtung
sind die Brückenventile 1 ,2, 3, 4 als Dioden ausgeführt, da die in den
Brückenzweigen angeordneten ohmschen Widerstände R1 und R2 eine Kurzschlußbelastung
des Löschkondensators C verhindern.
Im Betriebszustand, bei geschlossenem Schnellunterbrecher SU fließt ein Strom
von der Sammelschiene SS zur Strecke ST oder als Rückstrom in umgekehrter
Richtung von der Strecke ST zur Sammelschiene SS.
Mit der Auslösung des Befehls zum Öffnen des Schnellunterbrechers SU entlädt
sich der Antriebskondensator Ca, so daß die Antriebsspulen den
Schnellunterbrecher öffnen. Gleichzeitig wird der Kommutierungsthyristor Thk
über eine bestimmte Zeitspanne gezündet. Entsprechend der Stromrichtung
kommutiert der Strom beim Öffnen des Kontaktes des Schnellunterbrechers SU
über die Trennerkontakte Hs, über die Brückenventile 1, 3 und den
Kommutierungsthyristor Thk von der Sammelschiene SS zur Strecke ST bzw. von
der Strecke ST zur Sammelschiene SS über die Brückenventile 2, 4 und den
Kommutierungsthyristor Thk.
Parallel zum Antriebskondensator Ca, der vorzugsweise ein Elektrolytkondensator
ist, ist eine Paralleldiode Dp angeordnet, so daß ein noch nicht gelöschter
Kommutierungsstrom ausreichend lange fließen kann. Parallel zu den Antriebsspulen
des Schnellunterbrechers SU ist eine Spulenfreilaufdiode Dsp geschaltet.
Nach einer voreingestellten Zeit wird der Löschthyristor Thl gezündet, so daß der
Kommutierungsthyristor Thk durch die Spannung des Löschkondensators C über
die Ankoppeldiode D gelöscht wird und der Stromfluß von der Sammelschiene SS
zur Strecke ST bzw. von der Strecke ST zur Sammelschiene SS zu Null wird.
Sollte eine Leerabschaltung vorliegen, so wird der Löschkondensator C über die
Verbindung mit der Bahnerde BE umgeladen.FIG. 2 describes a commutation and quenching device for a quick breaker with an integrated drive and a separate drive capacitor. In this embodiment of the commutation and quenching device, the
In the operating state, with the rapid interrupter SU closed, a current flows from the busbar SS to the line ST or as reverse current in the opposite direction from the line ST to the busbar SS.
When the command to open the quick breaker SU is triggered, the drive capacitor Ca discharges, so that the drive coils open the quick breaker. At the same time, the commutation thyristor Thk is ignited for a certain period of time. Depending on the direction of the current, the current commutates when the contact of the quick breaker SU is opened via the isolating contacts Hs, the
A parallel diode Dp is arranged in parallel with the drive capacitor Ca, which is preferably an electrolytic capacitor, so that a commutation current which has not yet been quenched can flow for a sufficiently long time. A freewheeling diode Dsp is connected in parallel with the drive coils of the quick breaker SU. After a preset time, the quenching thyristor Thl is ignited, so that the commutation thyristor Thk is quenched by the voltage of the quenching capacitor C via the coupling diode D and the current flow from the busbar SS to the ST line or from the ST line to the busbar SS becomes zero. If there is an empty shutdown, the quenching capacitor C is reloaded via the connection to the rail ground BE.
Für die Prüfung der Strecke wird der Kommutierungszweig durch das Zünden des Prüfthyristors Thp eingeschaltet. Am Stromwandler W wird der Strom gemessen, dessen Größe ein Maß für den Zustand der Strecke ST darstellt. Sollte ein unzulässig hoher Strom vorliegen, wird der Prüfthyristor Thp durch das Zünden des Löschthyristors Thl und die Entladung des Löschkondensators C über die Ankoppeldiode D augenblicklich gelöscht und der Prüfstrom abgeschaltet.To check the route, the commutation branch is triggered by igniting the Test thyristor Thp switched on. The current is measured at the current transformer W, the size of which is a measure of the state of the line ST. Should be an inadmissible high current is present, the test thyristor Thp is triggered by the ignition of the Quenching thyristor Thl and the discharge of the quenching capacitor C via the coupling diode D immediately deleted and the test current switched off.
Eine Streckenprüfung mit einem konventionellen Prüfwiderstand erfolgt analog der Ausführung zu Fig. 1.A route test with a conventional test resistor is carried out analogously the embodiment of Fig. 1st
In der Fig. 3 ist eine Kommutierungs- und Löscheinrichtung eines Schnellunterbrechers
mit integriertem Antrieb und Nutzung des Löschkondensators als
Antriebskondensator beschrieben.
Im Betriebszustand, bei geschlossenem Schnellunterbrecher SU fließt ein Strom
von der Sammelschiene SS zur Strecke ST oder als Rückstrom in umgekehrter
Richtung von der Strecke ST zur Sammelschiene SS. Auch bei dieser Ausführungsform
der Kommutierungs- und Löscheinrichtung sind die Brückenventile
1 ,2, 3, 4 als Dioden ausgeführt, da in diesem Fall die in den Brückenzweigen
angeordneten Induktivitäten L1 und L2 als Strombegrenzungsdrosseln eine
Kurzschlußbelastung des Löschkondensators C verhindern.
Mit der Auslösung des Befehls zum Öffnen des Schnellunterbrechers SU entlädt
sich der Kondensator C, so daß die Antriebsspulen den Schnellunterbrecher SU
öffnen. Gleichzeitig werden die Kommutierungsthyristoren Thk1 und Thk2 über
eine bestimmte Zeitspanne gezündet. Entsprechend der Stromrichtung
kommutiert der Strom beim Öffnen des Kontaktes des Schnellunterbrechers SU
über die Trennerkontakte Hs, über die Brückenventile 1, 3, die
Kommutierungsthyristoren Thk1 und Thk2 und den Kondensator C von der
Sammelschiene SS zur Strecke ST bzw. von der Strecke ST zur Sammelschiene
SS über die Brückenventile 2, 4, die Strombegrenzungsdrosseln L1, L2 und die
Kommutierungsthyristoren Thk1, Thk2 sowie den Kondensator C.
Parallel zu den Antriebsspulen des Schnellunterbrechers SU ist eine Ankoppeldiode
D geschaltet.FIG. 3 describes a commutation and quenching device of a rapid breaker with an integrated drive and use of the quenching capacitor as a drive capacitor.
In the operating state, with the rapid interrupter SU closed, a current flows from the busbar SS to the line ST or as reverse current in the opposite direction from the line ST to the busbar SS. The
When the command to open the quick breaker SU is triggered, the capacitor C discharges, so that the drive coils open the quick breaker SU. At the same time, the commutation thyristors Thk1 and Thk2 are fired for a certain period of time. Depending on the direction of the current, the current commutates when the contact of the quick breaker SU opens via the isolating contacts Hs, the
A coupling diode D is connected in parallel with the drive coils of the quick breaker SU.
Nach einer voreingestellten Zeit, bzw. bei Erreichen einer maximalen Kondensatorspannung, werden die Löschthyristoren Thl1, Thl2 gezündet, so daß der Kondensator C emeut umgeladen wird. Dadurch werden über die Ankoppeldiode D sowie die beiden Löschthyristoren Thl1, Thl2 die beiden Kommutierungsthyristoren Thk1, Thk2 gelöscht und der Stromfluß von der Sammelschiene SS zur Strecke ST bzw. von der Strecke ST zur Sammelschiene SS wird zu Null.After a preset time or when a maximum capacitor voltage is reached, the quenching thyristors Thl1, Thl2 are ignited, so that the capacitor C reloaded. As a result, the coupling diode D and the two quenching thyristors Thl1, Thl2 the two commutation thyristors Thk1, Thk2 deleted and the current flow from the busbar SS to route ST or from route ST to busbar SS becomes zero.
Für die Prüfung der Strecke wird ein Prüfzweig durch das Zünden des ersten Löschthyristors Thl1 und des zweiten Kommutierungsthyristors Thk2 eingeschaltet, so daß ein Strom von der Sammelschiene SS zur Strecke ST fließen kann. Am Stromwandler W wird der Strom im Streckenabgang gemessen, dessen Größe ein Maß für den Zustand der Strecke ST darstellt. Sollte ein unzulässig hoher Strom vorliegen, dann wird der erste Löschthyristor Thl1 durch das Zünden des dritten Löschthyristors Thl3 und die Entladung des Löschkondensators C augenblicklich gelöscht und der Prüfstrom abgeschaltet.To test the route, a test branch is created by igniting the first Quenching thyristor Thl1 and the second commutation thyristor Thk2 switched on, so that a current flows from the busbar SS to the route ST can. At the current transformer W, the current in the line outlet is measured Size represents a measure of the state of the route ST. Should be an inadmissible high current, then the first quench thyristor Thl1 by ignition of the third quenching thistor Thl3 and the discharge of the quenching capacitor C immediately deleted and the test current switched off.
Eine Streckenprüfung mit einem konventionellen Prüfwiderstand erfolgt analog der Ausführung zu Fig. 1.A route test with a conventional test resistor is carried out analogously the embodiment of Fig. 1st
Claims (11)
- A method of commuting and discharging a direct current by the use of a fast cut-out and a commuting and discharge device connected in parallel to the fast cut-out circuit. Simultaneously with the switching command for the fast cut-out (FC), a brief triggering impulse is generated for the commuting thyristors (Thc) so that the current is commuted into the commuting branch when the fast cut-out (FC) contacts begin to open and the discharge thyristors are only triggered later when the circuit of the fast cut-out has opened. This is characterised by bridge thyristors (1, 2, 3, 4) installed in the commuting branch which are triggered briefly at the same time as the commuting thyristors (Thc) to allow commuting and which then close when the commuting current no longer flows through them and discharge thyristors (Thd) are only triggered when a short-circuit load no longer exists for a discharge capacitor (C), so that the voltage of the discharge capacitor (C) blocks the commuting thyristors (Thc) through a coupling diode (D) and discharges the commuting current.
- A circuit design for a commuting and discharge device in a rectifier sub-assembly for a railway power supply with a commuting and discharge device connected parallel to a fast cut-out to facilitate the method of claim 1, by which the fast cut-out is equipped with a separate drive. This is characterised by a commuting device consisting of a Grätz bridge with controlled bridge thyristors (1, 2, 3, 4) with a commuting thyristor (Thc) connected in the diagonal branch and a discharge branch consisting of a discharge capacitor (C), a discharge thyristor (Thd) and a coupling diode (D) is connected in parallel to the commuting thyristor (Thc).
- A circuit design for a commuting and discharge device in a rectifier sub-assembly for a railway power supply with a commuting and discharge device connected parallel to a fast cut-out to facilitate the method of claim 1, by which the fast cut-out is equipped with an integrated drive. This is characterised by a commuting device consisting of a Grätz bridge with controlled bridge thyristors (1, 2, 3, 4) with a commuting thyristor (Thc), a drive capacitor (Ca) with a parallel-connected diode (Dp) connected in the diagonal branch and the drive windings ofthe fast cut-out (FC) are connected in parallel with a bypass diode to which firstly a discharge circuit consisting of a discharge capacitor (C), a discharge thyristor (Thd) and a coupling diode (D) and secondly a test thyristor (Tht) are connected in parallel.
- A circuit design for a commuting and discharge device in a rectifier sub-assembly for a railway power supply with a commuting and discharge device connected parallel to a fast cut-out to facilitate the method of claim 1, by which the fast cut-out is equipped with an integrated drive. This is characterised by a commuting device consisting of a Grätz bridge with bridge thyristors (1, 2, 3, 4) in whose diagonal branch two commuting thyristors (Thc1, Thc2), a capacitor (C) and the drive windings ofthe fast cut-out (FC) are connected in parallel firstly with a charge and discharge circuit on the push-pull principle, by which a first discharge thyristor (Thd1) is connected in parallel to the first commuting thyristor (Thc1), the drive windings and the capacitor (C) and a coupling diode (D) is connected in parallel to the capacitor (C) and the second commuting thyristor (Thc2) in series with a second discharge thyristor (Thd2) and secondly a third discharge thyristor (Thd3) is connected in parallel to the first commuting thyristor (Thc1) and the drive windings.
- A circuit design according to claim 3 or 4, characterized by the fact that the bridge thyristors (1, 2, 3, 4) are diodes.
- A circuit design according to claim 2, 3 or 4 characterized by the fact that a test resistor (Rt) is connected in the diagonal branch ofthe Grätz bridge, which is shortcircuited during operation by the contact (S) of a relay.
- A circuit design according to claim 2 or 3 characterized by the fact that the connection between the discharge capacitor (C) and the anode of the coupling diode (D) is connected to ground (Gnd).
- A circuit design according to claim 2, 3 or 4 characterized by the fact that the commuting and discharge device is galvanically connected to the switched line by the contacts (AS) of an auxiliary cut-out.
- A circuit design according to claim 3 or 4 characterized by the fact that resistors (R1, R2) are connected in series with the bridge thyristors (2, 4) to limit the internal short-circuit currents.
- A circuit design according to claim 3 or 4 characterized by the fact that inductors (L1, L2) are connected in series with the bridge thyristors (2, 4) to limit the internal short-circuit currents.
- A circuit design according to claim 4 characterized by the fact that the connection point between the cathodes of the second discharge thyristor (Thd2) and the second commuting thyristor (Thc2) and the anodes of the bridge thyristors (3, 4) are connected to ground (Gnd) through a bypass diode.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4447441 | 1994-12-28 | ||
| DE19944447440 DE4447440C2 (en) | 1994-12-28 | 1994-12-28 | Method and circuit arrangement for a commutation and quenching device of a quick breaker with a separate drive |
| DE4447439 | 1994-12-28 | ||
| DE19944447439 DE4447439C2 (en) | 1994-12-28 | 1994-12-28 | Method and circuit arrangement for a commutation and quenching device of a quick breaker with integrated drive |
| DE4447440 | 1994-12-28 | ||
| DE19944447441 DE4447441C2 (en) | 1994-12-28 | 1994-12-28 | Method and circuit arrangement for a commutation and quenching device of a rapid breaker |
| PCT/EP1995/005070 WO1996020489A1 (en) | 1994-12-28 | 1995-12-20 | Process and circuit arrangement for a commutation and turning-off system of a quick make-and-break |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0800702A1 EP0800702A1 (en) | 1997-10-15 |
| EP0800702B1 true EP0800702B1 (en) | 1998-11-18 |
Family
ID=27207132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95942718A Expired - Lifetime EP0800702B1 (en) | 1994-12-28 | 1995-12-20 | Process and circuit arrangement for a commutation and turning-off system of a quick make-and-break |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0800702B1 (en) |
| AT (1) | ATE173559T1 (en) |
| CZ (1) | CZ287089B6 (en) |
| DE (1) | DE59504293D1 (en) |
| PL (1) | PL321014A1 (en) |
| WO (1) | WO1996020489A1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1540464A (en) * | 1967-08-16 | 1968-09-27 | Telemecanique Electrique | Hybrid contactor including detection of voltage build-up edges at the terminals of the mechanical pole |
| US4723187A (en) * | 1986-11-10 | 1988-02-02 | General Electric Company | Current commutation circuit |
| ES2040699T3 (en) * | 1986-12-22 | 1993-11-01 | Acec | ULTRA-FAST CIRCUIT BREAKER ASSISTED BY SEMICONDUCTORS. |
-
1995
- 1995-12-20 CZ CZ19972004A patent/CZ287089B6/en not_active IP Right Cessation
- 1995-12-20 EP EP95942718A patent/EP0800702B1/en not_active Expired - Lifetime
- 1995-12-20 PL PL95321014A patent/PL321014A1/en unknown
- 1995-12-20 AT AT95942718T patent/ATE173559T1/en not_active IP Right Cessation
- 1995-12-20 WO PCT/EP1995/005070 patent/WO1996020489A1/en active IP Right Grant
- 1995-12-20 DE DE59504293T patent/DE59504293D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59504293D1 (en) | 1998-12-24 |
| PL321014A1 (en) | 1997-11-24 |
| EP0800702A1 (en) | 1997-10-15 |
| WO1996020489A1 (en) | 1996-07-04 |
| CZ9702004A3 (en) | 1998-12-16 |
| ATE173559T1 (en) | 1998-12-15 |
| CZ287089B6 (en) | 2000-09-13 |
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