WO1993017480A1 - Voltage regulation arrangement for parallel transformer operation - Google Patents

Voltage regulation arrangement for parallel transformer operation Download PDF

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Publication number
WO1993017480A1
WO1993017480A1 PCT/AT1993/000026 AT9300026W WO9317480A1 WO 1993017480 A1 WO1993017480 A1 WO 1993017480A1 AT 9300026 W AT9300026 W AT 9300026W WO 9317480 A1 WO9317480 A1 WO 9317480A1
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WO
WIPO (PCT)
Prior art keywords
voltage
digital
transformers
transformer
microprocessor
Prior art date
Application number
PCT/AT1993/000026
Other languages
German (de)
French (fr)
Inventor
Franz Gross
Original Assignee
Elin Energieversorgung Gesellschaft M.B.H.
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 Elin Energieversorgung Gesellschaft M.B.H. filed Critical Elin Energieversorgung Gesellschaft M.B.H.
Publication of WO1993017480A1 publication Critical patent/WO1993017480A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
    • H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers

Definitions

  • the invention relates to an arrangement for voltage regulation during the parallel operation of transformers.
  • a parallel operation of transformers is necessary if an existing system is to be expanded or the total output is to be deliberately distributed over several units.
  • the windings on the upper and lower voltage side are connected to the same network.
  • busbar and network parallel operation.
  • Flawless parallel operation requires that no or only an insignificant equalizing current or circulating reactive current flows between the transformers connected in parallel and that the load is distributed according to the ratio of the nominal apparent power.
  • the switching groups of the transformers should also have the same characteristic numbers, terminals of the same name on the high-voltage side and the low-voltage side being connected to one another.
  • the object of the invention is to provide an arrangement in which an optimal voltage regulation can be carried out with little effort during the parallel operation of transformers and the necessary requirements are met.
  • each transformer has a tap changer which is connected to a microprocessor-controlled digital controller which regulates the tap voltage, and that each digital controller has an interface via which the digital controllers form a ring 1 are connected, and that the digital controllers exchange the measurement and control values with one another via the ring and thus regulate the compensating current or circulating reactive current flowing between the transformers to a minimum. 5
  • This arrangement does not require an additional circuit from
  • the tap changers of the individual transformers are automatically brought into an operating position in which the circulating reactive current between the 10 transformers reaches a minimum.
  • each digital controller has a microprocessor operating as a digital tolerance band controller, on which at least two
  • a display preferably an LCD display, a main switch and setting elements with which changeable parameters can be called up, set and stored, are connected, and that the microprocessor on the one hand detects the phase signals of the current and voltage transducers and from them determines the co ⁇ and, on the other hand, calculates the frequency, the active power, the apparent power and the reactive current from the processed or digitized secondary signals, and that 0 a delay stage in the microprocessor responds to a deviation of the transformer voltage from the set tolerance band to the preselected voltage soli value and after the delay time has elapsed, provided the actual voltage value is still outside the tolerance band, c the tap changer of the transformer is adjusted accordingly. This ensures that the tap changer is only adjusted when 1 the actual voltage value exceeds a tolerance range for a long time. Furthermore, the operation of the voltage regulator is very convenient due to the small number of clear buttons and the LCD display.
  • FIG. 1 shows how the individual voltage regulators are connected to one another when the transformers are operated in parallel
  • FIG. 2 shows the 10 voltages and currents when three transformers are connected in parallel.
  • FIG. 1 schematically shows a busbar parallel operation of four transformers 1, 2, 3, 4, wherein
  • each transformer 1, 2, 3, 4 has a control winding, parts of which can be switched on and off with a tap changer.
  • the primary side of each transformer 1, 2, 3, 4 is side to a bus bar 5 and the Sekundär ⁇ via a respective power switches 6, 7, 8, 9 connected to a second bus bar 0 10th
  • a microprocessor-controlled digital controller 11, 12, 13, 14 is assigned to each tap changer and, if necessary, the motor drive of the tap changer
  • Each digital controller 11, 12, 13, 14 is acted upon by a current transformer 15, 16, 17, 18 with a current I ⁇ , Iz, Is, ⁇ 4 proportional to the secondary current of the transformer 1, 2, 3, 4, and is also received a voltage converter 19, 20, 21, 22 a voltage that the
  • the digital regulators 11, 12, 13, 14 keep the voltage U.011 constant at a point distant from the busbar 10: __ or another busbar 23, ie they take into account the effective and reactive resistance in the line 24.
  • a serial interface is installed in each digital controller 11, 12, 13, 14, via which all digital controllers 11, 12, 13, 14 are connected to form a ring.
  • Optical fibers are most suitable as connecting lines between the digital controllers 11, 12, 13, 14.
  • the reactive current, active current components of the transformers 1, 2, 3, 4 and the line factor, which is necessary for adapting the lines to the nominal transformer currents, are exchanged between the digital controllers 11, 12, 13, 14 via the ring.
  • Each digital controller 11, 12, 13, 14 thus sets the tap changer in the associated transformer 1, 2, 3, 4 in such a way that only minimal circulating reactive current flows.
  • FIG. 2 shows the vector diagram for the parallel operation of three transformers.
  • the currents after the regulation are designated with index L.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

In a voltage regulation arrangement for parallel transformer operation, each transformer (1, 2, 3, 4) has a step switch which is connected to a microprocessor-controlled digital regulator (11, 12, 13, 14) which regulates the stage voltage. In addition, each digital regulator (11, 12, 13, 14) has an interface via which the digital regulators (11, 12, 13, 14) are connected to form a ring via which they interchange the measurements and regulating values. By means of these values they regulate the compensating current flowing between the transformers (1, 2, 3, 4) at a minimum. This arrangement requires no additional current or voltage converters and is therefore extremely economical. In addition, the step switches of the individual transformers are automatically taken into an operating position in which the reactive current between the transformers is reduced to a minimum.

Description

Anordnung zur Spannungsreqelung beim Parallelbetrieb von Transformatoren Arrangement for voltage regulation when operating transformers in parallel
Die Erfindung betrifft eine Anordnung zur Spannungsrege- lung beim Parallelbetrieb von Transformatoren.The invention relates to an arrangement for voltage regulation during the parallel operation of transformers.
Ein Parallelbetrieb von Transformatoren wird erforder¬ lich, wenn eine bestehende Anlage erweitert oder die Gesamtleistung bewußt auf mehrere Einheiten aufgeteilt werden soll. Beim Parallelbetrieb sind die Wicklungen der Ober- und ünterspannungsseite auf das gleiche Netz geschaltet. Man unterscheidet Sammeischienen- und Netz- Parallelbetrieb.A parallel operation of transformers is necessary if an existing system is to be expanded or the total output is to be deliberately distributed over several units. In parallel operation, the windings on the upper and lower voltage side are connected to the same network. A distinction is made between busbar and network parallel operation.
Einwandfreier Parallelbetrieb setzt voraus, daß zwischen den parallelgeschalteten Transformatoren kein oder nur ein unbedeutender Ausgleichstrom bzw. Kreisblindstrom fließt und die Lastaufteilung entsprechend dem Verhältnis der Nennscheinleistungen erfolgt.Flawless parallel operation requires that no or only an insignificant equalizing current or circulating reactive current flows between the transformers connected in parallel and that the load is distributed according to the ratio of the nominal apparent power.
Weiters sollen die Schaltgruppen der Transformatoren auch gleiche Kennzahlen aufweisen, wobei gleichnamige Klemmen auf der Oberspannungsseite und der ünterspannungsseite miteinander zu verbinden sind.Furthermore, the switching groups of the transformers should also have the same characteristic numbers, terminals of the same name on the high-voltage side and the low-voltage side being connected to one another.
Die Aufgabe der Erfindung besteht darin, eine Anordnung zu schaffen, bei der mit geringem Aufwand eine optimale Spannungsregelung beim Parallelbetrieb von Transforma¬ toren erfolgen kann und die notwendigen Voraussetzungen eingehalten werden.The object of the invention is to provide an arrangement in which an optimal voltage regulation can be carried out with little effort during the parallel operation of transformers and the necessary requirements are met.
Die Aufgabe wird durch die Erfindung gelöst. Diese ist dadurch gekennzeichnet, daß jeder Transformator einen Stufenschalter aufweist, der mit einem mi roprozessorge- steuerten Digitalregler verbunden ist, der die Stufen¬ spannung regelt, und daß jeder Digitalregler eine Schnitt¬ stelle aufweist über die die Digitalregler zu einem Ring 1 verbunden sind, und daß die Digitalregler die Meß- und Regel erte über den Ring untereinander austauschen und damit den zwischen den Trans ormatoren fließenden Aus¬ gleichsstrom bzw. Kreisblindstrom auf ein Minimum regeln. 5 Diese Anordnung erfordert keine Zusatzschaltung vonThe object is achieved by the invention. This is characterized in that each transformer has a tap changer which is connected to a microprocessor-controlled digital controller which regulates the tap voltage, and that each digital controller has an interface via which the digital controllers form a ring 1 are connected, and that the digital controllers exchange the measurement and control values with one another via the ring and thus regulate the compensating current or circulating reactive current flowing between the transformers to a minimum. 5 This arrangement does not require an additional circuit from
Strom- oder Spannungswandlern und ist daher auch äußerst kostengünstig. Weiters werden die Stufenschalter der einzelnen Transformatoren automatisch in eine Betriebs- Stellung geführt, in der der Kreisblindstrom zwischen den 10 Transformatoren ein Minimum erreicht.Current or voltage transformers and is therefore also extremely inexpensive. Furthermore, the tap changers of the individual transformers are automatically brought into an operating position in which the circulating reactive current between the 10 transformers reaches a minimum.
Nach einer Ausgestaltung der Erfindung weist jeder Digitalregler einen als digitalen Toleranzbandregler arbeitenden Mikroprozessor auf, an den mindestens zweiAccording to one embodiment of the invention, each digital controller has a microprocessor operating as a digital tolerance band controller, on which at least two
15 A/D-Wandler - von denen vorzugsweise einer mit der15 A / D converters - preferably one with the
Sekundärseite eines Spannungswandlers und ein zweiter mit der Sekundärseite eines Stromwandlers verbunden ist -, Schnittstellen, wobei vorzugsweise als Ausgabe¬ schnittstellen Relaistreiber und als Eingabeschnittstel- 0 len Optokoppler vorgesehen sind, eine alphanumerischeSecondary side of a voltage converter and a second to the secondary side of a current transformer is connected -, interfaces, preferably as Ausgabe¬ interfaces relay driver and 0 l s optocouplers are provided as Eingabeschnittstel-, an alphanumeric
Anzeige, vorzugsweise ein LCD-Display, ein Hauptschalter und Einstellorgane, mit denen veränderbare Parameter aufrufbar, einstellbar und abspeicherbar sind, ange¬ schlossen sind, und daß der Mikroprozessor einerseits die _- 5 Phasenverschiebung der Sekundärsignale der Strom- und Spannungs andler erfaßt und daraus den coβ ermittelt und andererseits aus den aufbereiteten bzw. digitali¬ sierten Sekundärsignalen die Frequenz, die Wirkleistung, die Scheinleistung und den Blindstrom errechnet, und daß 0 bei einer Abweichung der Transformatorspannung vom eingestellten Toleranzband zum vorgewählten Spannungs- soliwert eine Verzögerungsstufe im Mikroprozessor an¬ spricht und nach Ablauf der Verzögerungszeit, soferne der Spannungsistwert noch außerhalb des Toleranzbandes liegt, c der Stufenschalter des Transformators entsprechend verstellt wird. Dadurch wird sichergestellt, daß eine Verstellung des Stufenschalters nur dann erfolgt, wenn 1 der Spannungsistwert für längere Zeit einen Toleranzbe¬ reich überschreitet. Weiters ist die Bedienung des Spannungsreglers durch eine geringe Anzahl von über¬ sichtlichen Tasten und der LCD-Anzeige sehr komfortabel.A display, preferably an LCD display, a main switch and setting elements with which changeable parameters can be called up, set and stored, are connected, and that the microprocessor on the one hand detects the phase signals of the current and voltage transducers and from them determines the coβ and, on the other hand, calculates the frequency, the active power, the apparent power and the reactive current from the processed or digitized secondary signals, and that 0 a delay stage in the microprocessor responds to a deviation of the transformer voltage from the set tolerance band to the preselected voltage soli value and after the delay time has elapsed, provided the actual voltage value is still outside the tolerance band, c the tap changer of the transformer is adjusted accordingly. This ensures that the tap changer is only adjusted when 1 the actual voltage value exceeds a tolerance range for a long time. Furthermore, the operation of the voltage regulator is very convenient due to the small number of clear buttons and the LCD display.
Die Erfindung wird nun an Hand der Zeichnungen näher erläutert. Die Fig. 1 zeigt, wie die einzelnen Span¬ nungsregler beim Parallelbetrieb der Transformatoren untereinander verbunden sind und in Fig. 2 sind die 10 Spannungen und Ströme bei einer Parallelschaltung von drei Transformatoren dargestellt.The invention will now be explained in more detail with reference to the drawings. FIG. 1 shows how the individual voltage regulators are connected to one another when the transformers are operated in parallel, and FIG. 2 shows the 10 voltages and currents when three transformers are connected in parallel.
Die Fig. 1 zeigt schematisch einen Sammeischienen-Paral- lelbetrieb von vier Transformatoren 1, 2, 3, 4, wobei1 schematically shows a busbar parallel operation of four transformers 1, 2, 3, 4, wherein
15 jeder Transformator 1, 2, 3, 4 eine Regelwicklung auf¬ weist, von der Teile mit einem Stufenschalter zu- bzw. abschaltbar sind. Die Primärseite jedes Transformators 1, 2, 3, 4 ist an einer Sammelschiene 5 und die Sekundär¬ seite über je einen Leistungsschalter 6, 7, 8, 9 an eine 0 zweite Sammelschiene 10 angeschlossen.15 each transformer 1, 2, 3, 4 has a control winding, parts of which can be switched on and off with a tap changer. The primary side of each transformer 1, 2, 3, 4 is side to a bus bar 5 and the Sekundär¬ via a respective power switches 6, 7, 8, 9 connected to a second bus bar 0 10th
Jedem Stufenschalter ist ein mikroprozessorgesteuerter Digitalregler 11, 12, 13, 14 zugeordnet, der, wenn erforderlich, den Motorantrieb des StufenschaltersA microprocessor-controlled digital controller 11, 12, 13, 14 is assigned to each tap changer and, if necessary, the motor drive of the tap changer
25 ansteuert. Jeder Digitalregler 11, 12, 13, 14 wird über einen Stromwandler 15, 16, 17, 18 mit einem dem Sekundär¬ strom des Transformators 1, 2, 3, 4 proportionalem Strom Iα, Iz, Is, ∑4 beaufschlagt und erhält weiters über einen Spannungswandler 19, 20, 21, 22 eine Spannung, die der25 controls. Each digital controller 11, 12, 13, 14 is acted upon by a current transformer 15, 16, 17, 18 with a current Iα, Iz, Is, ∑4 proportional to the secondary current of the transformer 1, 2, 3, 4, and is also received a voltage converter 19, 20, 21, 22 a voltage that the
50 auf der Sammelschiene 10 proportional ist. Diese wird als üi.r bezeichnet.5 0 on the busbar 10 is proportional. This is called üi.r.
Die Digitalregler 11, 12, 13, 14 halten die Spannung U.011 auf einem von der Sammelschiene 10 entfernten Punkt •:__ oder einer anderen Sammelschiene 23 konstant, d.h. sie berücksichtigen den Wirk- und Blindwiderstand in der Leitung 24. In jedem Digitalregler 11, 12, 13, 14 ist eine serielle Schnittstelle eingebaut, über welche alle Digitalregler 11, 12, 13, 14 zu einem Ring zusammengeschaltet sind. Als Verbindungsleitungen zwischen den Digitalreglern 11, 12, 13, 14 sind Lichtwellenleiter am besten geeignet. Über den Ring werden die Blindstrom-, Wirkstromanteile der Transformatoren 1, 2, 3, 4 und der Leitungsfaktor, welcher zur Anpassung der Leitungen an die Trafo-Nenn¬ ströme notwendig ist, zwischen den Digitalreglern 11, 12, 13, 14 ausgetauscht. Damit wird von jedem Digitalregler 11, 12, 13, 14 der Stufenschalter im zugehörigen Trans¬ formator 1, 2, 3, 4 derart eingestellt, daß nur minimaler Kreisblindstrom fließt.The digital regulators 11, 12, 13, 14 keep the voltage U.011 constant at a point distant from the busbar 10: __ or another busbar 23, ie they take into account the effective and reactive resistance in the line 24. A serial interface is installed in each digital controller 11, 12, 13, 14, via which all digital controllers 11, 12, 13, 14 are connected to form a ring. Optical fibers are most suitable as connecting lines between the digital controllers 11, 12, 13, 14. The reactive current, active current components of the transformers 1, 2, 3, 4 and the line factor, which is necessary for adapting the lines to the nominal transformer currents, are exchanged between the digital controllers 11, 12, 13, 14 via the ring. Each digital controller 11, 12, 13, 14 thus sets the tap changer in the associated transformer 1, 2, 3, 4 in such a way that only minimal circulating reactive current flows.
In Fig. 2 ist das Zeigerdiagramm für den Parallelbetrieb von drei Transformatoren dargestellt. Es sind dabei die Spannung ü die Ströme Ix, Ia, I3 der Transformatoren und deren Wirk- IWι, Iwz, Iw-3 und Blindstromanteile IBX, IB2, IB3 eingezeichnet. Mit Index L sind die Ströme nach der Regelung bezeichnet. 2 shows the vector diagram for the parallel operation of three transformers. The voltage ü the currents Ix, Ia, I 3 of the transformers and their active I W ι, Iwz, Iw-3 and reactive current components IBX, IB2, IB3 are shown. The currents after the regulation are designated with index L.

Claims

- -PATENTANSPRÜCHE - PATENT CLAIMS
1. Anordnung zur Spannungsregelung beim Parallelbetrieb von Transformatoren, dadurch gekennzeichnet, daß jeder Transformator (1, 2, 3, 4) einen Stufenschalter aufweist, der mit einem mikroprozessorgesteuerten Digitalregler (11, 12, 13, 14) verbunden ist, der die Stufenspannung regelt, und daß jeder Digitalregler (11, 12, 13, 14) eine Schnittstelle aufweist über die die Digitalregler (11, 12, 13, 14) zu einem Ring verbunden sind, und daß die Digitalregler (11, 12, 13, 14) die Meß- und Regelwerte über den Ring untereinander austauschen und damit den zwischen den Transformatoren (1, 2, 3, 4) fließenden Ausgleichsström bzw. Kreisblindstrom auf ein Minimum regeln.1. Arrangement for voltage regulation when operating transformers in parallel, characterized in that each transformer (1, 2, 3, 4) has a tap changer which is connected to a microprocessor-controlled digital regulator (11, 12, 13, 14) which regulates the tap voltage , and that each digital controller (11, 12, 13, 14) has an interface via which the digital controllers (11, 12, 13, 14) are connected to form a ring, and that the digital controllers (11, 12, 13, 14) have the Exchange measured and control values with each other via the ring and thus control the compensating current or circulating reactive current flowing between the transformers (1, 2, 3, 4) to a minimum.
2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß jeder Digitalregler (11, 12, 13, 14) einen als digitalen Toleranzbandregler arbeitenden Mikroprozessor aufweist, an den mindestens zwei A/D-Wandler - von denen vorzugs¬ weise einer mit der Sekundärseite eines Spannungswandlers (19, 20, 21, 22) und ein zweiter mit der Sekundärseite eines Stromwandlers (15, 16, 17, 18) verbunden ist -, Schnittstellen, wobei vorzugsweise als Ausgabeschnitt- stellen Relaistreiber und als Eingabeschnittstellen2. Arrangement according to claim 1, characterized in that each digital controller (11, 12, 13, 14) has a microprocessor operating as a digital tolerance band controller, to the at least two A / D converters - one of which preferably with the secondary side of one Voltage converter (19, 20, 21, 22) and a second one is connected to the secondary side of a current converter (15, 16, 17, 18), interfaces, relay drivers preferably as output interfaces and input interfaces
Optokoppler vorgesehen sind, eine alphanumerische Anzei¬ ge, vorzugsweise ein LCD-Display, ein Hauptschalter und Einstellorgane, mit denen veränderbare Parameter aufruf¬ bar, einstellbar und abspeicherbar sind, angeschlossen sind, und daß der Mikroprozessor einerseits die Phasen¬ verschiebung der SekundärSignale der Strom- und Span¬ nungswandler erfaßt und daraus den cosCp ermittelt und andererseits aus den aufbereiteten bzw. digitalisierten Sekundärsignalen die Frequenz, die Wirkleistung, die Scheinleistung und den Blindstrom errechnet, und daß bei einer Abweichung der Transformatorspannung vom einge¬ stellten Toleranzband zum vorgewählten Spannungssoliwert eine Verzögerungsstufe im Mikroprozessor anspricht und nach Ablauf der Verzögerungszeit, soferne der Spannungs- istwert noch außerhalb des Toleranzbandeε liegt, der Stufenschalter des Transformators (1, 2, 3, 4) entspre- chend verstellt wird. Optocouplers are provided, an alphanumeric display, preferably an LCD display, a main switch and setting elements with which changeable parameters can be called up, set and stored, are connected, and the microprocessor on the one hand the phase shift of the secondary signals of the current - Detects and voltage converter and determines the cosCp from it and on the other hand calculates the frequency, the active power, the apparent power and the reactive current from the processed or digitized secondary signals, and that if the transformer voltage deviates from the set tolerance band to the preselected voltage solitary value a delay stage in the microprocessor responds and after the delay time has elapsed, provided that the actual voltage value is still outside the tolerance band, the tap changer of the transformer (1, 2, 3, 4) is adjusted accordingly.
PCT/AT1993/000026 1992-02-19 1993-02-19 Voltage regulation arrangement for parallel transformer operation WO1993017480A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0029792A ATA29792A (en) 1992-02-19 1992-02-19 ARRANGEMENT FOR VOLTAGE REGULATION IN PARALLEL OPERATION OF TRANSFORMERS
ATA297/92 1992-02-19

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WO1993017480A1 true WO1993017480A1 (en) 1993-09-02

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692858A1 (en) * 1994-07-14 1996-01-17 MASCHINENFABRIK REINHAUSEN GmbH Method for displaying a power plant configuration of any of more power busbars parallel connected step transformators with a tension regulator and a display array for the display
DE102008053193A1 (en) * 2008-10-24 2010-04-29 Maschinenfabrik Reinhausen Gmbh Method for parallel control of transformers with tap changers
DE102014119158A1 (en) 2014-12-19 2016-06-23 Maschinenfabrik Reinhausen Gmbh Selective parallel running procedure for measuring / control devices

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GB1088754A (en) * 1963-07-12 1967-10-25 Bruce Pebbles Ind Ltd Transformer control arrangement
GB2188800A (en) * 1986-04-05 1987-10-07 Reinhausen Maschf Scheubeck Method of controlling parallel operation of tapped transformers in master-follower relationship

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Publication number Priority date Publication date Assignee Title
GB1088754A (en) * 1963-07-12 1967-10-25 Bruce Pebbles Ind Ltd Transformer control arrangement
GB2188800A (en) * 1986-04-05 1987-10-07 Reinhausen Maschf Scheubeck Method of controlling parallel operation of tapped transformers in master-follower relationship

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Title
4TH IECI ANNUAL CONFERENCE PROCEEDINGS "INDUSTRIAL APPLICATIONS OF MICROPROCESSORS" 20. März 1978, PHILADELPHIA Seiten 60 - 65 GRONDIN 'design of a microcomputer controlling a group of parallel tap changing transformers' *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0692858A1 (en) * 1994-07-14 1996-01-17 MASCHINENFABRIK REINHAUSEN GmbH Method for displaying a power plant configuration of any of more power busbars parallel connected step transformators with a tension regulator and a display array for the display
CN1041875C (en) * 1994-07-14 1999-01-27 赖茵豪森机械制造公司 Method for displaying arrangement state of multiple adjustable transformer device and detector of same
DE102008053193A1 (en) * 2008-10-24 2010-04-29 Maschinenfabrik Reinhausen Gmbh Method for parallel control of transformers with tap changers
WO2010045995A3 (en) * 2008-10-24 2011-05-26 Maschinenfabrik Reinhausen Gmbh Method for parallel control of transformers having step switches
DE102014119158A1 (en) 2014-12-19 2016-06-23 Maschinenfabrik Reinhausen Gmbh Selective parallel running procedure for measuring / control devices
WO2016096355A1 (en) 2014-12-19 2016-06-23 Maschinenfabrik Reinhausen Gmbh Selective parallel running method for measuring/control devices
US10193341B2 (en) 2014-12-19 2019-01-29 Maschinenfabrik Reinhausen Gmbh Method of operating parallel transformers

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