DE332166C - Switching device working depending on the difference in currents at the ends of the section to restrict the disruption area in line networks - Google Patents
Switching device working depending on the difference in currents at the ends of the section to restrict the disruption area in line networksInfo
- Publication number
- DE332166C DE332166C DE1919332166D DE332166DD DE332166C DE 332166 C DE332166 C DE 332166C DE 1919332166 D DE1919332166 D DE 1919332166D DE 332166D D DE332166D D DE 332166DD DE 332166 C DE332166 C DE 332166C
- Authority
- DE
- Germany
- Prior art keywords
- section
- switching device
- currents
- difference
- restrict
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/28—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
- H02H3/30—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
- H02H3/305—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel involving current comparison
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
Gruße elektrische Leitungsnetze pflegt man aus einzelnen abschaltbaren Teilstrecken zusammenzusetzen. 1st alsdann die Anordnung, wi-e beispielsweise bei Ringnetzen, so getroffen, daß eine Speisung über die einzelnen Teilstrecken sowohl in der einen als in der anderen Richtung erfolgen kann, so läßt sich bei Störungen durch Kurz- oder Erdschlüsse erreichen, daß nur die selbsttätigen Ausschalter am Ende der unmittelbar betroffenen Strecke herausfallen, während im übrigen der Betrieb des Netzes in keiner Weise beeinträchtigt wird. Um das zu ermöglichen, ist bereits vorgeschlagen worden, den Umstand zu benutzen, daß im ungestörten -Betriebe die Ströme an den beiden Enden einer Teilstrecke nach Größe und Richtung übereinstimmen müssen, während sich im Falle einer Störung mehr oder weniger große Unterschiede einstellen. So hat man an den Enden der Teilstrecke Stromwandler eingebaut, deren Sekundärwicklungen über ein Hilfsleitungssystem gegeneinander geschaltet waren, und durch den bei einer Störung im Hilfsleitungssystem auftretenden Strom die Auslösung der Schalter an den Enden der gestörten Strecke bewirkt. Diese Anordnung hat jedoch praktisch versagt, denn in der Tat bedingt der Kapazitätsstrom der Teilstrecke einen gewissen Unterschied der Ströme an den beiden Enden. Gemäß der Erfindung soll daher bei der bekannten Schalteinrichtung der Kapazitätsstrom dadurch aufgehoben werden, daß in die Magneti-Greetings electrical wiring networks are usually put together from individual disconnectable sections. If then the arrangement, as in the case of ring networks, for example, is made in such a way that a supply via the individual Sections can take place both in one and in the other direction, so can be in the case of disturbances by short or Earth faults achieve that only the automatic switch at the end of the immediate affected route fall out, while the rest of the operation of the network in none Way is affected. To make this possible, it has already been suggested that to use the fact that in undisturbed operation the currents to the two The ends of a section must match in terms of size and direction, while in the event of a malfunction, more or less set big differences. So you have current transformers at the ends of the section installed, their secondary windings against each other via an auxiliary line system were switched, and by the one that occurs in the event of a fault in the auxiliary line system Electricity triggers the switches at the ends of the disturbed line. However, this arrangement has practically failed because in fact the capacity flow of the section causes a certain difference of the currents at both ends. According to the invention, therefore, in the known Switching device of the capacitance current are canceled by the fact that in the magnetic
Hilfsleitung" ein entsprechender
sierungsstrom eingeführt wird. Ein Ausführungsbeispiel für die.^e abgeänderte
Schalteinrichtung ist in der Zeichnung unter Zugrundelegung eines Drehstromnetzes veranschaulicht.
1Auxiliary line "a corresponding
tion current is introduced. An embodiment for the. ^ E modified switching device is illustrated in the drawing on the basis of a three-phase network. 1
Nach Fig. 1 der Zeichnung ist die Teilstrecke mit A, das Hilfsleitungssystem mit B bezeichnet. An den Enden der Teilstrecke A befinden sich Verteilungsstationen C1, C~, die über Schalter g1, a2 mit der Teilstrecke verbunden sind. In der Nähe dieser Schalter sind in die Hauptleitungen A Primärwicklungen I von Stromwandlern eingebaut, deren Sekundärwicklungen TTI durch das Hilfsleitungssystem B in Gegenschaltung verbunden sind. Zu den beiden Wicklungen I und III der Stromwandler treten nun noch Hilfswicklungen II hinzu, die unter Vorschaltung von Drosselspulen b zweckmäßig über Spannungswandler c an der Netzspannung liegen. Die verschiedenen Spulen I, II, III sind nach Fig. 2 auf einem gemeinsamen Eisenkörper angeordnet. An den Enden der Hilfsleitung B sind Auslöserelais d1, d" für die Schalter a1, a" eingeschaltet.According to FIG. 1 of the drawing, the section is designated with A and the auxiliary line system with B. At the ends of the section A there are distribution stations C 1 , C ~, which are connected to the section via switches g 1 , a 2. In the vicinity of these switches, primary windings I of current transformers are built into the main lines A , the secondary windings TTI of which are connected by the auxiliary line system B in a counter-circuit. Auxiliary windings II are now added to the two windings I and III of the current transformers, which are advantageously connected to the mains voltage via voltage transformers c, with choke coils b connected upstream. The various coils I, II, III are arranged according to FIG. 2 on a common iron body. At the ends of the auxiliary line B , trip relays d 1 , d " for the switches a 1 , a" are switched on.
Bei ungestörtem Betriebe tritt alsdann infolge der Gleichheit der Ströme an den beiden Enden der Teilstrecke A in dem Hilfsleitungssystem B kein Strom auf. Im Falle eines Erd- oder Kurzschlusses dagegen ergeben sich in dem Hilfsleitungssystem B mehr oder weniger starke Ströme, welche die Relais d1, d2 zum Ansprechen bringen und da-In the case of undisturbed operations, no current then occurs in the auxiliary line system B due to the equality of the currents at the two ends of the section A. In the event of an earth fault or short circuit, on the other hand, more or less strong currents result in the auxiliary line system B , which cause the relays d 1 , d 2 to respond and thus
mit die Ausschaltung der Schalter a1, ar veranlassen. Auf diese Weise wird die Teilstrecke, in der sich die Störungsstelle befindet, aus dem Netz herausgetrennt, während im übrigen der Betrieb des Netzes keinerlei Störung erfährt.use to switch off switches a 1 , ar . In this way, the section in which the fault point is located is separated from the network, while the operation of the network does not experience any interference whatsoever.
Für die Sekundärwicklungen III der Stromwandler ist nicht unbedingt Sternschaltung erforderlich, sondern es kann statt ίο dessen natürlich auch Dreieckschaltung verwendet werden.For the secondary windings III the current transformer is not necessarily star connection required, but delta connection can of course also be used instead of this will.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE332166T | 1919-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE332166C true DE332166C (en) | 1921-01-25 |
Family
ID=6201589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1919332166D Expired DE332166C (en) | 1919-10-12 | 1919-10-12 | Switching device working depending on the difference in currents at the ends of the section to restrict the disruption area in line networks |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE332166C (en) |
-
1919
- 1919-10-12 DE DE1919332166D patent/DE332166C/en not_active Expired
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