DE1029090B - Arrangement to protect mercury vapor rectifiers against short circuits - Google Patents
Arrangement to protect mercury vapor rectifiers against short circuitsInfo
- Publication number
- DE1029090B DE1029090B DEM33691A DEM0033691A DE1029090B DE 1029090 B DE1029090 B DE 1029090B DE M33691 A DEM33691 A DE M33691A DE M0033691 A DEM0033691 A DE M0033691A DE 1029090 B DE1029090 B DE 1029090B
- Authority
- DE
- Germany
- Prior art keywords
- rectifier
- arrangement
- parallel
- arrangement according
- overcurrent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1209—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for converters using only discharge tubes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/127—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers having auxiliary control electrode to which blocking control voltages or currents are applied in case of emergency
Description
DEUTSCHESGERMAN
Die Erfindung bezieht sich auf eine Anordnung zum Schutz von Quecksilberdampfgleichrichtern gegen Kurzschlüsse, wobei im Störungsfalle die Gleichrichtergitter durch entsprechende Schaltmaßnahmen von Überstromrelais ein gegenüber der Kathode negatives Potential erhalten.The invention relates to an arrangement for protecting mercury vapor rectifiers against Short circuits, with the rectifier grid by appropriate switching measures in the event of a fault received a negative potential compared to the cathode from overcurrent relays.
Um Gleichrichter gegen Kurzschlüsse zu schützen, sind bereits verschiedene Maßnahmen zur Anwendung gekommen. So ist es seit langem bekannt, auf der Primär- oder Sekundärseite des Gleichrichtertransformators oder auf der Gleichstromseite der Stromrichter Relais anzuordnen, die beim Auftreten eines Kurzschlusses selbsttätig die Gitter an ein negatives Sperrpotential legen, so daß die Kurzschluströme begrenzt oder unterdrückt werden können. Um eine möglichst rasche Sperrung zu erreichen, verwendet man oftmals mehrere Relais gleichzeitig, die dann beispielsweise von der Gleichstromseite oder von den einzelnen Phasen aus gespeist sind. Die bisher bekannten Anordnungen weisen jedoch den Nachteil auf, daß ihre Ansprechzeit nicht ohne weiteres so klein gehalten werden kann, daß in allen Störungsfällen ein einwandfreier Schutz gewährleistet ist. Eine wirksame Sperrung der Anoden ist nämlich nur dann möglich, wenn die Relais etwa innerhalb von 2 bis 3 Millisekunden ansprechen. Der angegebene Wert bezieht sich auf eine Netzfrequenz von 50 Hz. Unter bestimmten Bedingungen, insbesondere bei Rückzündungen, erfolgt nun aber der Anstieg des Kurzschlußstromes relativ langsam. Die Auslösung der Relais durch den Überstrom ist dann nicht mehr mit der erforderlichen Schnelligkeit zu erreichen.Various measures are already in use to protect rectifiers against short circuits came. It has long been known on the primary or secondary side of the rectifier transformer or to arrange relays on the direct current side of the converter, which in the event of a short circuit automatically put the grid at a negative blocking potential so that the short-circuit currents are limited or can be suppressed. In order to achieve the fastest possible blocking, one often uses several relays at the same time, for example from the direct current side or from the individual Phases are fed off. However, the previously known arrangements have the disadvantage that their Response time cannot easily be kept so short that a faultless one in all malfunctions Protection is guaranteed. An effective blocking of the anodes is only possible if the relays respond within 2 to 3 milliseconds. The specified value relates to a mains frequency of 50 Hz. Under certain conditions, particularly in the case of reignition, takes place but now the rise in the short-circuit current is relatively slow. The relay tripping due to the overcurrent can then no longer be reached with the required speed.
Es ist zwar bereits vorgeschlagen worden, die Ansprechzeiten von Relais, die in Fernsprechanlagen Verwendung finden, mit Hilfe einer speziellen Schaltanordnung zu verändern. Hierbei liegen zwei Relaiswicklungen parallel, und eine dieser Wicklungen wird transformatorisch von einer weiteren beeinflußt, so daß der Einschaltinduktionsstoß in gewünschter Weise eine Beschleunigung oder Verzögerung des Stromanstieges bewirken kann. Eine solche Anordnung erfordert jedoch verhältnismäßig viele Spulen, und ihre Anpaßfähigkeit ist gering.Although it has already been suggested, the response times of relays used in telephone systems Find use to change with the help of a special circuit arrangement. There are two relay windings here parallel, and one of these windings is transformer-influenced by another, see above that the switch-on induction surge in the desired manner accelerates or decelerates the rise in current can cause. However, such an arrangement requires a relatively large number of coils, and their Adaptability is poor.
Die Mängel des Bekannten lassen sich vermeiden, wenn erfindungsgemäß parallel zu den Überstromrelais induktiv-ohmsche Scheinwiderstände geschaltet sind und die gleichgerichteten Sekundärströme von Stromwandlern die Parallelschaltungen speisen. Die Schaltzeiten sind dann stets außerordentlich klein.The shortcomings of the known can be avoided if, according to the invention, in parallel with the overcurrent relay inductive-ohmic apparent resistances are switched and the rectified secondary currents of Current transformers feed the parallel circuits. The switching times are then always extremely short.
Die Zeichnung gibt ein Ausführungsbeispiel der erfindungsgemäßen Gitterlöschanordnung wieder (Fig. 1), und sie zeigt ferner eine Kennlinie, welche die Wirkungsweise des Erfindungsgegenstandes erklärt (Fig. 2).The drawing gives an embodiment of the invention Grid erasing arrangement again (Fig. 1), and it also shows a characteristic curve which the Operation of the subject matter of the invention explained (Fig. 2).
Anordnung zum SchutzArrangement for protection
von Quecksilberdampfgleichrichternof mercury vapor rectifiers
gegen Kurzschlüsseagainst short circuits
Anmelder:Applicant:
Maschinenfabrik Oerlikon,
Zürich-Oerlikon (Schweiz)Machine factory Oerlikon,
Zurich-Oerlikon (Switzerland)
Vertreter: Ph. Frhr. v. Habermann, Rechtsanwalt,
München 22, Widenmayerstr. 34Representative: Ph. Frhr. v. Habermann, lawyer,
Munich 22, Widenmayerstr. 34
Beanspruchte Priorität:
Schweiz vom 17. Januar 1957Claimed priority:
Switzerland from January 17, 1957
Dipl.-Ing. Bjarne Storsand, Zürich (Schweiz),
ist als Erfinder genannt wordenDipl.-Ing. Bjarne Storsand, Zurich (Switzerland),
has been named as the inventor
In Fig. 1 sind die Primärwicklungen des Gleichrichtertransformators mit 1, die Sekundärwicklungen mit 2, die Saugdrosselspule mit 3, die Gleichrichter mit 4 und die Gleichstromsammelschienen mit 5 und 6 bezeichnet. In den Transformatorzuleitungen liegen die Stromwandler 7, deren Sekundärströme von den Brückenschaltungen 8 gleichgerichtet werden. Diese Gleichströme erregen ein Überstromrelais 9 und einen parallel geschalteten stark induktiven Scheinwiderstand 10. Im Störungsfalle spricht dann das Relais 9 an und legt das negative Potential der Sperrspannungsquelle 11 über die Vorwiderstände 12 an die Gleichrichtergitter 13. Nach Fig. 1 sind die Stromwandler 7 in den einzelnen Phasen der Transformatorwicklung 1 angeordnet, sie können aber auch in die Anodenleitungen geschaltet werden.In FIG. 1, the primary windings of the rectifier transformer are denoted by 1, the secondary windings by 2, the suction choke coil by 3, the rectifiers by 4 and the direct current busbars by 5 and 6. The current transformers 7, whose secondary currents are rectified by the bridge circuits 8, are located in the transformer feed lines. These direct currents excite an overcurrent relay 9 and a highly inductive impedance 10 connected in parallel arranged individual phases of the transformer winding 1, but they can also be switched into the anode lines.
Die Wirkungsweise der erfindungsgemäßen Anordnung sei an Hand von Fig. 2 erläutert, in der auf der Abszisse die Zeit t und auf der Ordinate die Stromstärke i aufgetragen ist. Zunächst soll angenommen werden, daß der Scheinwiderstand 10 (Fig. 1) nicht vorhanden ist. Dann durchfließt der gesamte Gleichstrom i das Überstromrelais 9 (Kurve c). Tritt nun zum Zeitpunkt tt infolge einer Störung eine Strom-The mode of operation of the arrangement according to the invention is explained with reference to FIG. 2, in which the time t is plotted on the abscissa and the current intensity i is plotted on the ordinate. It should first be assumed that the impedance 10 (FIG. 1) is not present. Then the entire direct current i flows through the overcurrent relay 9 (curve c). If a current occurs at time t t as a result of a fault
5c änderung auf, deren Verlauf vereinfacht als lineare Funktion dargestellt wurde, so ist die Ansprechzeit des Überstromrelais durch die Strecke b gegeben, wenn die Ansprechstromstärke α·ΐ beträgt. Bei Parallelschaltung eines Scheinwiderstandes, dessen ohm-5c change, the course of which has been shown in simplified form as a linear function, the response time of the overcurrent relay is given by the distance b when the response current is α · ΐ . When connecting an impedance in parallel, the ohmic
809 508/131809 508/131
scher Widerstand kleiner ist als derjenige des Uberstromrelais, wird dieser bei normaler Belastung der Gleichrichter nur noch von Strom i' erregt (Kurve c'), während der Widerstand 10 die Stromdifferenz i-i' führt. Auch nach dem Zeitpunkt t1 ändert sich die genannte Stromdifferenz nicht, da der stark induktive Widerstand praktisch eine Stromänderung nicht zuläßt. Das Uberstromrelais spricht also bereits nach der Zeit d an, wenn die Ansprechstromstärke wieder das α-fache des stationären Wertes beträgt. Es ist also möglich, die Ansprechzeit erheblich zu verkürzen.shear resistance is smaller than that of the overcurrent relay, this is only excited by current i ' (curve c') under normal load of the rectifier, while the resistor 10 carries the current difference i-i '. Even after time t 1 , the mentioned current difference does not change, since the highly inductive resistance practically does not allow a change in current. The overcurrent relay responds after the time d when the response current is again α times the steady-state value. It is therefore possible to shorten the response time considerably.
Claims (4)
Deutsche Patentschrift Nr. 569 924.Considered publications:
German patent specification No. 569 924.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1190179X | 1957-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1029090B true DE1029090B (en) | 1958-04-30 |
Family
ID=4562157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM33691A Pending DE1029090B (en) | 1957-01-17 | 1957-03-27 | Arrangement to protect mercury vapor rectifiers against short circuits |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1029090B (en) |
FR (1) | FR1190179A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091659B (en) * | 1959-07-06 | 1960-10-27 | Ludwig Schubert Dipl Ing | Circuit for recording the maximum influencing variable |
DE1154567B (en) * | 1960-12-22 | 1963-09-19 | Westinghouse Electric Corp | Protection device for a multi-phase converter arrangement |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE569924C (en) * | 1926-04-02 | 1933-02-09 | Siemens & Halske Akt Ges | Relay switching, especially for telephone systems |
-
1957
- 1957-03-27 DE DEM33691A patent/DE1029090B/en active Pending
-
1958
- 1958-01-16 FR FR1190179D patent/FR1190179A/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE569924C (en) * | 1926-04-02 | 1933-02-09 | Siemens & Halske Akt Ges | Relay switching, especially for telephone systems |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1091659B (en) * | 1959-07-06 | 1960-10-27 | Ludwig Schubert Dipl Ing | Circuit for recording the maximum influencing variable |
DE1154567B (en) * | 1960-12-22 | 1963-09-19 | Westinghouse Electric Corp | Protection device for a multi-phase converter arrangement |
Also Published As
Publication number | Publication date |
---|---|
FR1190179A (en) | 1959-10-09 |
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