Nothing Special   »   [go: up one dir, main page]

DE614316C - Arrangement for the suppression of large short-circuit currents in electrical networks - Google Patents

Arrangement for the suppression of large short-circuit currents in electrical networks

Info

Publication number
DE614316C
DE614316C DEF73864D DEF0073864D DE614316C DE 614316 C DE614316 C DE 614316C DE F73864 D DEF73864 D DE F73864D DE F0073864 D DEF0073864 D DE F0073864D DE 614316 C DE614316 C DE 614316C
Authority
DE
Germany
Prior art keywords
arrangement
network
suppression
circuit
circuit currents
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
Application number
DEF73864D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Felten and Guilleaume Carlswerk AG
Original Assignee
Felten and Guilleaume Carlswerk AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Felten and Guilleaume Carlswerk AG filed Critical Felten and Guilleaume Carlswerk AG
Priority to DEF73864D priority Critical patent/DE614316C/en
Application granted granted Critical
Publication of DE614316C publication Critical patent/DE614316C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Description

Anordnung zur Unterdrückung von großen Kurzschlußströmen in elektrischen Netzen Um das Auftreten eines großen Stromes in einem elektrischen Netz im Falle seines Kurzschlusses zu vermeiden, ist es bekannt, in einem dem Netz vorgeschalteten Schutzapparat, beispielsweise einer Drosselspule, eine EMK zu induzieren, die der aufgedrückten Netzspannung entgegengesetzt gerichtet ist. Ein solcher Schutzapparat verteuert aber die Anlagekosten erheblich, insbesondere dann, wenn er eine ausreichende Schutzwirkung haben soll, weil er dann verhältnismäßig groß wird.Arrangement for the suppression of large short-circuit currents in electrical Networks To the occurrence of a large current in an electrical network in the event To avoid its short circuit, it is known in an upstream of the network Protective apparatus, for example a choke coil, to induce an EMF, which the applied mains voltage is in the opposite direction. Such a protective apparatus but increases the investment costs considerably, especially if it is sufficient Should have protective effect, because it is then relatively large.

Erfindungsgemäß wird ein besonderer Schutzapparat vermieden. Zu diesem Zweck wird der dem Netz vorgeschaltete Transformator selbst als Schutzapparat verwendet. Vorteilhaft wird als Schutzapparat und gleichzeitig als Netztransformator eine Asynchronmaschine verwendet, deren Ankerwicklung die Sekundärwicklung des Transformators darstellt und zur Speisung des Netzes dient. Durch eine geeignete Vorrichtung wird dafür gesorgt, daß sich der Anker in Ruhe befindet, solange der normale Betriebsstrom fließt, und daß er rotiert, wenn ein Kurzschluß in der zu schützenden- Leitung besteht, so daß in der Sekundärwicklung des Transformators eine EMK induziert wird, die etwa so groß wie die sekundäre Spannung bei stillstehender Maschine und dieser Spannung Cent_ gegengesetzt gerichtet ist. Dadurch wird das Entstehen eines großen Kurzschlußstromes verhindert. Nach der Beseitigung des Kurzschlusses wird der Anker wieder in seine alte Ruhelage gebracht. Eine Anordnung gemäß der Erfindung kann auch angewendet werden, um das betriebsmäßige Zu- und Abschalten des Netzes zu erleichtern.According to the invention, a special protective apparatus is avoided. To this Purpose, the transformer connected upstream of the network itself is used as a protective device. An asynchronous machine is advantageous as a protective device and at the same time as a network transformer used, the armature winding of which represents the secondary winding of the transformer and serves to feed the network. A suitable device ensures that that the armature is at rest as long as the normal operating current flows, and that it rotates when there is a short circuit in the line to be protected, so that in the secondary winding of the transformer an EMF is induced, which is something like this as large as the secondary voltage when the machine is at a standstill and this voltage Cent_ is directed opposite. This creates a large short-circuit current prevented. After eliminating the short circuit, the armature is back in its brought old rest position. An arrangement according to the invention can also be used to facilitate the operational connection and disconnection of the network.

Die Erfindung hat den Vorteil, daß das Auftreten von großen Kurzschlußströmen in einem elektrischen Netz ohne Verwendung eines besonderen Schutzapparates selbsttätig verhindert wird.The invention has the advantage that large short-circuit currents occur in an electrical network without the use of a special protective device is prevented.

Claims (1)

PATRNTANSPRUCH: Anordnung zur Unterdrückung großer Kurzschlußströme in einem elektrischen Netz, bei der während des Bestehens eines Kurzschlusses in einem dem Netz vorgeschalteten Schutzapparat eine der aufgedrückten Netzspannung entgegenwirkende EMK induziert wird, dadurch gekennzeichnet, daß als Schutzapparat und gleichzeitig als Netztransformatör eine Asynchronmaschine dient, deren Ankerwicklung die Sekundärwicklung des Transformators darstellt und zur Speisung des Netzes dient und die mit einer solchen Einrichtung versehen ist; daß der Anker im Normalbetrieb stillsteht und während des Bestehens eines Kurzschlusses im Sekundärstromkreis rotiert.PATRNT CLAIM: Arrangement for suppressing large short-circuit currents in an electrical network in which, while a short circuit exists, in one of the applied mains voltage to a protective device upstream of the mains counteracting EMF is induced, characterized in that as a protective apparatus and at the same time an asynchronous machine serves as a network transformer, the armature winding of which represents the secondary winding of the transformer and serves to supply the network and which is provided with such a device; that the anchor is in normal operation stands still and rotates while there is a short circuit in the secondary circuit.
DEF73864D 1932-08-04 1932-08-04 Arrangement for the suppression of large short-circuit currents in electrical networks Expired DE614316C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEF73864D DE614316C (en) 1932-08-04 1932-08-04 Arrangement for the suppression of large short-circuit currents in electrical networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF73864D DE614316C (en) 1932-08-04 1932-08-04 Arrangement for the suppression of large short-circuit currents in electrical networks

Publications (1)

Publication Number Publication Date
DE614316C true DE614316C (en) 1935-06-24

Family

ID=7112112

Family Applications (1)

Application Number Title Priority Date Filing Date
DEF73864D Expired DE614316C (en) 1932-08-04 1932-08-04 Arrangement for the suppression of large short-circuit currents in electrical networks

Country Status (1)

Country Link
DE (1) DE614316C (en)

Similar Documents

Publication Publication Date Title
DE614316C (en) Arrangement for the suppression of large short-circuit currents in electrical networks
DE2715930A1 (en) INVERTER
DE735657C (en) Protective device for multi-phase AC systems that are subject to changing working conditions
DE695340C (en) Circuit arrangement for braking AC motors with direct current
DE648478C (en) Method for braking asynchronous motors using direct current
DE587793C (en) Process for the step-by-step introduction of rapid protection systems with the line resistance monitoring minimum relay in line networks
DE698975C (en) nes for the cyclic control of several discharge paths serving control voltage system
DE690148C (en) Arrangement of three-phase R-excitation operating as a generator with an external frequency
DE672873C (en) Arrangement to protect three-phase series motors against overload at low speed
AT287856B (en) Circuit arrangement for shortening the run-out or for quickly stopping a rectifier-excited synchronous machine, in particular provided with a compounding circuit
AT130549B (en) Method and arrangement for overexcitation of synchronous or asynchronous reactive power machines or generators.
DE598859C (en) Device to facilitate the coarse synchronization of synchronous machines, the nominal power of which is considerable in relation to that of the network on which they work
DE741047C (en) Monitoring device for synchronous machines
DE439056C (en) Protection circuit for X-ray equipment
AT23780B (en) Protection device for AC power distribution systems.
DE479266C (en) Overcurrent protection circuit for three-phase systems
DE687940C (en) Synchronous machine, in particular synchronous motor or synchronized asynchronous motor, with a main and auxiliary exciter
DE500004C (en) Commutator frequency converter
DE714596C (en) Arrangement for monitoring the accumulator batteries used in power plants, switching stations, etc. for the control of switching and protection devices
DE571463C (en) Earth fault protection for the armature winding of DC machines and single armature converters
AT165492B (en) Device for power interruption in multi-phase rectifier systems
DE395371C (en) Protective device for portable, electrically driven machines
DE765251C (en) Selective protection device for electrical lines
DE668633C (en) Arrangement for complete or almost complete suppression of the fault current that occurs in the event of an earth fault or short circuit in a multiple line
DE1085602B (en) Protection arrangement for a power supply system in which an alternating current network feeds a direct current busbar system via converters