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AT121912B - Procedure for overlaying extensive power networks with control currents. - Google Patents

Procedure for overlaying extensive power networks with control currents.

Info

Publication number
AT121912B
AT121912B AT121912DA AT121912B AT 121912 B AT121912 B AT 121912B AT 121912D A AT121912D A AT 121912DA AT 121912 B AT121912 B AT 121912B
Authority
AT
Austria
Prior art keywords
districts
frequency
station
overlaying
procedure
Prior art date
Application number
Other languages
German (de)
Original Assignee
Siemens 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 Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT121912B publication Critical patent/AT121912B/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B37/00Tables adapted for other particular purposes
    • A47B2037/005Tables specially adapted for laboratories

Landscapes

  • Devices For Supply Of Signal Current (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur   Überlagerung   von ausgedehnten   Starkstromnetzen   mit Steuerströmen. 
 EMI1.1 
 



   Sind zwei Netzbezirke vielfach miteinander vermischt, so dass die Absperrung zu grosse Kosten verursachen würde, so kann man unter Umständen auf die Absperrung ganz oder teilweise verzichten, jedem Bezirk eine   besondere Überlagerungsstation   zuteilen, die Überlagerungsstationen gleichzeitig betreiben, aber in der Weise, dass wenigstens die Steuerfrequenz der einen Station in kleinen Intervallen um die benötigte Frequenz pendelt. Es tritt dann in der Sendezeit, beispielsweise je einmal in der Minute, ein Betriebszustand ein, wo die Spannungsvektoren der beiden Stationen miteinander in Phase sind. Bei diesem Zustand summieren sich an allen Stellen der beiden Bezirke, insbesondere auch an den Bezirks- 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 nicht notwendig. Die Absperrung der einzelnen Netzbezirke kann bei Gleichstromnetzen z.

   B. durch Drosselspulen erfolgen, bei Wechselstromnetzen durch Transformatoren mit Haupt-und Gegenwieklung. wobei die Hauptwicklung in den Netzleiter eingeschaltet ist, während die Gegenwicklung von einer Hilfsspannungsquelle mit Netzfrequenz oder im   Nebenschluss   zu einem im Netzleiter eingeschalteten Widerstand, insbesondere im Nebenschluss zur Hauptwieklung, gespeist wird und einen frequenzabhängigen Widerstand solcher Art enthält, dass das Gleichgewicht der Amperewindungen der Haupt-und Gegenwicklung nur bei Netzfrequenz, nicht aber bei Steuerfrequenz vorhanden ist. Ein solcher Transformator wirkt für den Netzstrom in der Hauptsache nur wie ein Ohmseher Widerstand, für den Steuerstrom da- 
 EMI2.1 
 frequenz abgestimmten Schwingungskreis ausbilden.

   Bei Absperrung der Bezirke durch Gegenspannungs- quellen mit Steuerfrequenz wird an der Bezirksgrenze ungefähr dieselbe Spannung abgesetzt, die in der Überlagerungsstation aufgedrückt wird. Man kann aber auch die   Absperrung mit Sperrkreisen, die   auf die Steuerfrequenz abgestimmt sind, durchführen. 



   PATENT-ANSPRÜCHE :
1. Verfahren zur Überlagerung von ausgedehnten   Starkstromnetzen.   deren Leiter zum Teil frequenzabhängige, den Durchgang bestimmter Frequenzen sperrende Widerstände enthalten, mit Steuerströmen netzfremder Frequenz, dadurch gekennzeichnet, dass durch diese Widerstände das Starkstromnetz für die Steuerströme in wenigstens zwei Bezirke unterteilt wird. die je von einem Speisepunkt getrennt mit tonfrequenten Steuerströmen überlagert werden.



   <Desc / Clms Page number 1>
 



  Procedure for overlaying extensive power networks with control currents.
 EMI1.1
 



   If two network districts are mixed with one another so that the barring would cause excessive costs, it may be possible to completely or partially dispense with barring, assign a special overlay station to each district, operate the overlay stations at the same time, but in such a way that at least the Control frequency of one station fluctuates around the required frequency in small intervals. During the transmission time, for example once a minute, an operating state occurs where the voltage vectors of the two stations are in phase with one another. In this situation, add up at all points in the two districts, in particular also at the district
 EMI1.2
 

 <Desc / Clms Page number 2>

 unnecessary. The isolation of the individual network districts can be done in direct current networks z.

   B. by choke coils, in AC networks by transformers with main and counterweight. where the main winding is switched on in the mains conductor, while the counter-winding is fed by an auxiliary voltage source with mains frequency or in a shunt to a resistor connected in the mains conductor, in particular in a shunt to the main circuit, and contains a frequency-dependent resistor such that the balance of the ampere turns of the main -and reverse winding is only present at mains frequency, but not at control frequency. Such a transformer acts mainly like an ohmic resistor for the mains current;
 EMI2.1
 Form a frequency-matched oscillation circuit.

   When the districts are blocked by counter-voltage sources with a control frequency, approximately the same voltage is applied to the district boundary as is applied in the overlay station. But you can also shut off with blocking circuits that are matched to the control frequency.



   PATENT CLAIMS:
1. Procedure for overlaying extensive power networks. the conductors of which contain partly frequency-dependent resistors blocking the passage of certain frequencies, with control currents of non-network frequency, characterized in that the high-voltage network for the control currents is divided into at least two areas by these resistors. which are each superimposed separately from a feed point with audio-frequency control currents.

 

Claims (1)

2. Verfahren nach Anspruch 1 zur Überlagerung mehrerer Bezirke durch eine gemeinsame Station. dadurch gekennzeichnet, dass die Station mit den einzelnen Bezirken, insbesondere mit deren Schwerpunkten, durch besondere Steuerleitungen verbunden wird und die einzelnen Bezirke durch abwechselndes Einschalten der Steuerleitungen nacheinander überlagert werden. 2. The method according to claim 1 for superimposing several districts by a common station. characterized in that the station is connected to the individual districts, in particular with their focal points, by special control lines and the individual districts are superimposed one after the other by alternately switching on the control lines. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, dass als Steuerleitungen die Betriebstelephonleitungen oder der nicht geerdete Nulleiter und die Erde verwendet werden und in den Bezirken von der Erd- zur Serien- oder Parallelüberlagerung übergegangen wird. 3. The method according to claim 2, characterized in that the company telephone lines or the non-grounded neutral conductor and the earth are used as control lines and a transition is made in the districts from the earth to series or parallel superposition. 4. Verfahren zur Überlagerung insbesondere von zwei schwer absperrbare Netzbezirken mit je einer Überlagerungsstation, dadurch gekennzeichnet, dass die beiden Bezirke gleichzeitig überlagert werden und dass man die Frequenz wenigstens der einen Station in kleinen Intervallen um die Steuerfrequenz schwanken oder pendeln lässt. 4. A method for superimposing, in particular, two difficult-to-lock network districts, each with an overlay station, characterized in that the two districts are superimposed simultaneously and that the frequency of at least one station is allowed to fluctuate or oscillate at small intervals around the control frequency.
AT121912D 1929-01-07 1930-01-04 Procedure for overlaying extensive power networks with control currents. AT121912B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE121912T 1929-01-07

Publications (1)

Publication Number Publication Date
AT121912B true AT121912B (en) 1931-03-25

Family

ID=29277186

Family Applications (1)

Application Number Title Priority Date Filing Date
AT121912D AT121912B (en) 1929-01-07 1930-01-04 Procedure for overlaying extensive power networks with control currents.

Country Status (1)

Country Link
AT (1) AT121912B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739264C (en) * 1936-02-26 1943-09-17 Siemens Ag Method for the remote control of receiving relays connected to a power network with the aid of intermediate relays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739264C (en) * 1936-02-26 1943-09-17 Siemens Ag Method for the remote control of receiving relays connected to a power network with the aid of intermediate relays

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