DE725747C - Circuit arrangement for the protection of power lines against operational disturbances - Google Patents
Circuit arrangement for the protection of power lines against operational disturbancesInfo
- Publication number
- DE725747C DE725747C DES88408D DES0088408D DE725747C DE 725747 C DE725747 C DE 725747C DE S88408 D DES88408 D DE S88408D DE S0088408 D DES0088408 D DE S0088408D DE 725747 C DE725747 C DE 725747C
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- line
- protection
- power lines
- lines against
- 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
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/003—Fault detection by injection of an auxiliary voltage
Landscapes
- Protection Of Generators And Motors (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Description
Schaltungsanordnung zum Schutze von Starkstromleitungen gegen Betriebsstörungen Es ist bereits vorgeschlagen worden, zum Schutz von Starkstromleitungen gegen Betriebsstörungen, insbesondere Kurzschluß oder Erdschluß, der Leitung höherperiodige, zweckmäßig hochfrequente Schwingungen aufzudrücken. Die bei einer Störung auf der Leitung eintretende Änderung des von der Leitung aufgenommenen Hochfrequenzstromes, z. B. infolge Änderung des Eingangswiderstandes der Leitung, wird dabei zur Betätigung von Anzeigevorrichtungen oder Relais benutzt. Um die Empfindlichkeit der Anordnung zu steigern, kann man eine von dem Hochfrequenzstrom gespeiste Wheatstonesche Brückenschaltung vorsehen, bei welcher der Widerstandswert des einen Zweiges von dem Widerstand des zu überwachenden Anlageteils abhängt und deren Brückenstrom die Schutzeinrichtung steuert.Circuit arrangement for the protection of power lines against malfunctions It has already been proposed to protect power lines against malfunctions, in particular short circuit or earth fault, the line higher periodic, expediently high frequency To impose vibrations. The change that occurs in the event of a fault on the line of the high-frequency current absorbed by the line, e.g. B. as a result of a change in Input resistance of the line is used to operate display devices or relay used. To increase the sensitivity of the arrangement, one can provide a Wheatstone bridge circuit fed by the high-frequency current, at which the resistance of one branch differs from the resistance of the one to be monitored Plant part depends and whose bridge current controls the protective device.
Die vorliegende Erfindung betrifft eine Anordnung, die ebenfalls den Vorzug einer hohen Empfindlichkeit hat und die außerdem ein leichtes Abgleichen ermöglicht, da die vielen kapazitiven Nebenschlüsse der Brückenschaltung fehlen. Gemäß der Erfindung wird der von der Leitung aufgenommene höherperiodige Strom und ein dieselbe Frequenz aufweisender konstanter Strom mit entgegengesetzter magnetischer Wirkung über einen Transformator geleitet, dessen Sekundärwicklung ein Relais für den Schutz der Starkstromleitung speist.The present invention relates to an arrangement which also has the It has the advantage of high sensitivity and which also allows easy adjustment because the many capacitive shunts of the bridge circuit are missing. According to the invention, the higher-period current consumed by the line is and a constant current having the same frequency with opposite magnetic Effect passed through a transformer, the secondary winding of which is a relay for feeds the protection of the power line.
Die Zeichnung zeigt ein Ausführungsbeispiel der Erfindung. - Mit i ist der Hochfrequenzgenerator bezeichnet, der über die Kondensatoren 2 die Starkstromleitung 3 speist. Zum Hochfrequenzgenerator ist ein Abgleichwiderstand 5, der Ohmscher, induktiver oder kapazitiver Natur sein kann, parallel geschaltet. Zwischen dem von dem Hochfrequenzstrom gesteuerten Relais 6 und dem Hochfrequenzstromkreis ist nun noch ein Differentialtransformator .4 derart eingeschaltet, daß die Mitte seiner Primärwicklungen mit dem einen Pol des Hochfrequenzgenerators verbunden ist, während die beiden Enden einerseits mit dem einen Pol der Starkstromleitung, andererseits mit dem einen Pol des Vergleichswiderstandes 5 verbunden sind. Im normalen Betriebszustande fließen von dem Hochfrequenzgenerator durch d;e beiden Hälften der Primärwicklung des Transformators in entgegengesetztem Sinne Ströme, die am Widerstande 5 derart abgeglichen werden können, daß sie sich bezüglich der Induktionswirkung auf die Sekundärwicklung des Transformators vollständig aufheben. Tritt nun an der Leitung 3 eine Störung ein, dann ändert sich der Hochfrequenzstrom in dem einen Teil der Primärwicklung, und an der Sekundärwicklung des Transformators 4. entsteht eine hochfrequente Spannung, die das Relais 6 zum Ansprechen bringt.The drawing shows an embodiment of the invention. - With i the high-frequency generator is referred to, which over the capacitors 2 the power line 3 feeds. To the high frequency generator is a balancing resistor 5, the ohmic, inductive or capacitive in nature, connected in parallel. Between that of the high-frequency current controlled relay 6 and the high-frequency circuit is now another differential transformer .4 switched on in such a way that the middle of his Primary windings connected to one pole of the high frequency generator while the two ends on the one hand with one pole of the power line, on the other hand are connected to one pole of the comparison resistor 5. In normal operating conditions flow from the high frequency generator through the two halves of the primary winding of the transformer in the opposite sense currents that at the resistors 5 in such a way can be adjusted so that they relate to the induction effect on the Completely cancel the secondary winding of the transformer. Now step on the line 3 a disturbance, then the high frequency current changes in one part of the Primary winding, and on the secondary winding of the transformer 4 high-frequency voltage that causes relay 6 to respond.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES88408D DE725747C (en) | 1928-10-03 | 1928-11-13 | Circuit arrangement for the protection of power lines against operational disturbances |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE682631X | 1928-10-03 | ||
| DES88408D DE725747C (en) | 1928-10-03 | 1928-11-13 | Circuit arrangement for the protection of power lines against operational disturbances |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE725747C true DE725747C (en) | 1942-09-28 |
Family
ID=25946175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES88408D Expired DE725747C (en) | 1928-10-03 | 1928-11-13 | Circuit arrangement for the protection of power lines against operational disturbances |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE725747C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950737C (en) * | 1953-09-24 | 1956-10-18 | Calor Emag Elek Zitaets Ag | Graduated protection for selective ground fault shutdown in inductively grounded high-voltage mesh networks |
| DE1139192B (en) * | 1960-10-07 | 1962-11-08 | Licentia Gmbh | Monitoring device for control and measuring lines |
| DE1146176B (en) * | 1957-07-09 | 1963-03-28 | Charbonnages De France | Protective device against short circuits in electrical networks |
| DE1149799B (en) * | 1961-01-10 | 1963-06-06 | Charbonnages De France | Arrangement for the protection of electrical networks |
-
1928
- 1928-11-13 DE DES88408D patent/DE725747C/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE950737C (en) * | 1953-09-24 | 1956-10-18 | Calor Emag Elek Zitaets Ag | Graduated protection for selective ground fault shutdown in inductively grounded high-voltage mesh networks |
| DE1146176B (en) * | 1957-07-09 | 1963-03-28 | Charbonnages De France | Protective device against short circuits in electrical networks |
| DE1139192B (en) * | 1960-10-07 | 1962-11-08 | Licentia Gmbh | Monitoring device for control and measuring lines |
| DE1149799B (en) * | 1961-01-10 | 1963-06-06 | Charbonnages De France | Arrangement for the protection of electrical networks |
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