EP3183434A1 - Coupling a gas turbine and a steam turbine with a target coupling angle by adjusting the polar wheel angle - Google Patents

Coupling a gas turbine and a steam turbine with a target coupling angle by adjusting the polar wheel angle

Info

Publication number
EP3183434A1
EP3183434A1 EP15774921.9A EP15774921A EP3183434A1 EP 3183434 A1 EP3183434 A1 EP 3183434A1 EP 15774921 A EP15774921 A EP 15774921A EP 3183434 A1 EP3183434 A1 EP 3183434A1
Authority
EP
European Patent Office
Prior art keywords
excitation
angle
gas turbine
coupling
excitation current
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.)
Granted
Application number
EP15774921.9A
Other languages
German (de)
French (fr)
Other versions
EP3183434B1 (en
Inventor
Martin Berning
Marc Diefenbach
Marcel Langer
Martin Ophey
Dennis Schlüter
Michael Winkel
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.)
Siemens AG
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
Priority to PL15774921T priority Critical patent/PL3183434T3/en
Publication of EP3183434A1 publication Critical patent/EP3183434A1/en
Application granted granted Critical
Publication of EP3183434B1 publication Critical patent/EP3183434B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K13/00—General layout or general methods of operation of complete plants
    • F01K13/02—Controlling, e.g. stopping or starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/12—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled
    • F01K23/16—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engines being mechanically coupled all the engines being turbines

Definitions

  • the excitation of the excitation winding can be changed by changing an excitation current flowing through the exciter winding.
  • the method comprises the following steps:
  • step a) and step b) temporally overlap at least partially ⁇ .
  • Step b) is always carried out when it is not or only difficult, for example not in a short time
  • Step a) Is possible time to step a) extend the target dome angle to it ⁇ .
  • Step a) is known, so that no further explanations are given for this purpose.
  • Step b) will be explained in more detail.
  • the so-called rotor angle can be influenced.
  • Under the Polradwinkel, also called load angle, is generally the angle to understand, under which the pole of a synchronous machine leads the synchronous rotating field. The details will not be discussed here because they are known to those of ordinary skill in the art. It is important to understand that changing the rotor angle changes the reactive power, but it remains possible to provide the required active power.
  • the invention thus makes it possible to influence not only the angular position of the steam turbine, but also the angular position of the gas turbine. Although usually only an influence of a few degrees is possible, nevertheless an additional degree of freedom is created, which the If required, it is very easy to facilitate and accelerate domes with target dome angles.
  • the rotor angle depends on the ratio of active power and reactive power. Since the ratio of active power and reactive power from the excitation, that depends on the excitation current, the appropriate choice of reactive power at ge ⁇ specified active power is basically equivalent to choose as saying the excitation current accordingly.
  • the relationships make it clear that it is not necessary to detect the rotor angle directly. It is basically enough to change the reactive power accordingly for a given active power. This can be used in the regulation on the already detected variables active power and reactive power.
  • Polradwinkel can be taken from a so-called performance diagram, as will be explained later.
  • In one embodiment is increased at a run ahead of the gas turbine with respect to the target clutch angle of the excitation current, and reduced at a lag of the gas turbine of the excitation current ⁇ .
  • the rotor angle can be lowered. So it is the angle by which the pole precedes the synchronous rotating field, lowered.
  • the generator and thus the gas turbine are thus, as it were et ⁇ turned back, so that eliminates the Vorausilen the gas turbine with respect to the Zielkuppelwinkel.
  • the change of the excitation current is used to fluctuations in the mains frequency, which make it difficult to reach the target clutch angle, finallyglei ⁇ chen.
  • the grid frequency in Germany a value of 50 hertz example ⁇ as is desired, nevertheless still occur small fluctuations. If these occur during the coup ⁇ pein, ie just in the run - up to the actual dome, while the steam turbine is accelerating or decelerating, it is often no longer possible to accelerate the Adjust steam turbine accordingly.
  • the change in the excitation current and the concomitant change in the rotor angle and thus the change in the angular position of the gas turbine is very important, if not indispensable, to engage quickly with target coupling angle.
  • the angle of the gas turbine by up to 5 ° Variegated ⁇ bar by the change of the excitation current is manageable, but still important. It remains that the essential degree of freedom in coupling is given by the appropriate acceleration of the steam turbine and the choice of dome time.
  • the excitation voltage is changed to change the excitation current. This allows a Be ⁇ influence of the excitation current in a simple manner.
  • the above considerations may also be used for a method of disengaging a steam turbine and a gas turbine connected to a generator.
  • the generator in turn has an excitation winding whose excitation can be changed by changing an excitation current flowing through the exciter winding.
  • the change of the rotor angle allows a rotation of the gas turbine. In certain situations, this may be advantageous when disengaging, ie when releasing the coupling between the gas turbine and the steam turbine. Above all, it is often possible to speed up the disengagement. This reduces the wear of the clutch.
  • a control device for a single shaft turbine set with a gas turbine, a steam turbine and a generator is likewise provided.
  • the control device is set up such that the method described above for Coupling and / or disengaging is feasible. It often suffice marginal changes of the already existing control device. In many cases you can limit yourself to another programming.
  • the implementation of the inventive method thus requires only very überschau ⁇ ble effort. Normally, a retrofit be ⁇ standing single-shaft turbine sets, strictly speaking, the side ⁇ impaired control device is possible. Further details will be described with reference to FIG. 1, which shows a performance diagram in which the relationships between reactive power, active power and rotor angle are shown.
  • the active power is plotted in MW.
  • the reactive power is entered in the Mvar on the high-value axis.
  • the line 1 runs at the Blindleis ⁇ tion 0. In the lying on the line 1 operating points so only active power is provided. For the operating points below line 1, the reactive power is negative, for the above positive.
  • the edges ending at the edge stand for certain values of the Cos phi, where phi is the angle between the voltage induced in the generator and the resulting current in the phasor diagram.
  • arrows 3, 4 and 5 emanating from an origin 2 at the bottom left. As can be seen, these ends at operating points with the same active power but different reactive power.
  • the track 6 which connects the two end points of the arrows 3 and 5, is a typi ⁇ shear area in which the reactive power can be adjusted, while the active power remains the same.
  • the angle between the arrows 3, 4 and 5 and the high-value axis is the respective pole wheel angle.
  • the location of Ur ⁇ jump 2 is metrologically determined.
  • the rotor angle can be read in the performance diagram, in which an arrow is drawn from the origin 2 to the respective operating point is determined and the angle of this arrow to the high-value axis.
  • the reactive power is to be increased for this purpose.
  • the excitation so the excitation voltage and thus reduce the excitation current as far as until the Polradwinkel is 42 °. It is therefore possible in a ⁇ way by a change in the reactive power, which can be brought about by changed excitation, to influence the Polradwinkel and thus to influence the target dome angle in an improved manner.

Abstract

The invention relates to a method for coupling a gas turbine connected to a generator and a steam turbine, wherein the generator has an excitation winding, the excitation of which can be changed by changing an excitation current flowing through the excitation winding, comprising the following steps: a) accelerating and/or decelerating the steam turbine in such a way that the coupling takes place with a target coupling angle; b) if necessary, changing the excitation current such that the excitation of the excitation winding changed in this way leads to a changed polar wheel angle, wherein the polar wheel angle is changed in such a way that the achieving of the target coupling angle is supported. The invention also relates to an analogous method, wherein the polar wheel angle is changed for the purposes of improved decoupling. A corresponding regulation device is also provided.

Description

Beschreibung description
Kuppeln einer Gasturbine und einer Dampfturbine mit Coupling a gas turbine and a steam turbine with
Zielkuppelwinkel mit Verstellen des Polradwinkels Target coupling angle with adjustment of the rotor angle
Beim Anfahren von Gasturbinenkraftwerken gilt es häufig die Dampfturbine zuzuschalten, sobald mit der Abwärme der Gastur¬ bine genügend Dampf zum Antreiben der Dampfturbine bereitge- stellt werden kann. Dazu werden die Gasturbine und die Dampf¬ turbine mittels einer Kupplung gekuppelt. Besonders zur Ver¬ meidung von Unwuchten werden Ansätze verfolgt, durch eine gezielte Regelung des Kuppelvorgangs bei einem Zielkuppelwinkel zu kuppeln. Dazu wird die Dampfturbine in geeigneter Weise beschleunigt. Die Frequenz der Gasturbine ist insoweit vor¬ gegeben als diese mit der Frequenz des Stromnetzes, in das die Einspeisung erfolgt, übereinstimmen muss. When starting of gas turbine power plants it is often to switch on the steam turbine once bereitge- with the waste heat of Gastur ¬ bine enough steam to drive the steam turbine sets can be. For this purpose, the gas turbine and the steam ¬ turbine are coupled by means of a coupling. Especially for Ver ¬ avoidance of unbalances approaches are used to couple through a targeted control of the coupling process at a target clutch angle. For this purpose, the steam turbine is accelerated in a suitable manner. The frequency of the gas turbine is given so far ¬ as this must match the frequency of the power grid into which the feed takes place.
Aus der EP 1 911 939 AI ist ein Verfahren zum Einkuppeln ei- ner Antriebswelle einer Strömungsmaschine mit einer From EP 1 911 939 AI a method for engaging a drive shaft of a turbomachine with a
Abtriebswelle mittels einer Kupplung bekannt. Die Strömungs¬ maschine wird auf eine in Bezug auf die Abtriebswelle unter¬ synchrone Drehzahl hochgefahren und auf dieser Haltedrehzahl gehalten, bevor ein Signal zum Start des Kuppeins gesetzt wird, um ein Kuppeln mit Zielkuppelwinkel zu erreichen. Bei der Strömungsmaschine handelt es sich im Regelfall um eine Dampfturbine und bei der Abtriebswelle um die Welle zum An¬ treiben des Generators. Aufgabe der Erfindung ist es eine Möglichkeit zum verbesser¬ ten Kuppeln mit Zielkuppelwinkel bereitzustellen. Die Lösung dieser Aufgabe findet sich insbesondere in den unabhängigen Ansprüchen. Die abhängigen Ansprüche geben vorteilhafte Wei¬ terentwicklungen an. In der Beschreibung und in den Zeichnun- gen sind weitere Informationen enthalten. Output shaft known by means of a coupling. The flow ¬ machine is raised to a synchronous with respect to the output shaft ¬ synchronous speed and held at this holding speed before a signal to start the Kuppeins is set to achieve a coupling with Zielkuppelwinkel. In the turbomachine is usually a steam turbine and the output shaft to the shaft for driving ¬ the generator. The object of the invention is to provide an opportunity for Improvement ¬ th domes with target engagement angle. The solution to this problem can be found in particular in the independent claims. The dependent claims disclose advantageous Wei ¬ develop- ments. The description and drawings contain further information.
Es wird ein Verfahren zum Kuppeln einer mit einem Generator verbundenen Gasturbine und einer Dampfturbine bereitgestellt, wobei der Generator eine Erregerwicklung aufweist. Die Erregung der Erregerwicklung kann durch Veränderung eines durch die Erregerwicklung fließenden Erregungsstroms verändert werden. Das Verfahren weist folgende Schritte auf: A method is provided for coupling a gas turbine and a steam turbine connected to a generator, wherein the generator has a field winding. The excitation of the excitation winding can be changed by changing an excitation current flowing through the exciter winding. The method comprises the following steps:
a) Beschleunigen und/oder Verzögern der Dampfturbine derart, dass das Kuppeln mit einem Zielkuppelwinkel erfolgt; a) accelerating and / or decelerating the steam turbine such that the coupling takes place with a target dome angle;
b) bei Bedarf Veränderung des Erregungsstroms, so dass die dadurch veränderte Erregung der Erregerwicklung zu einem veränderten Polradwinkel führt, wobei der Polradwinkel derart verändert wird, dass das Erreichen des Zielkuppelwinkels un¬ terstützt wird. b) If necessary, change of the excitation current, so that the resulting changed excitation of the excitation winding leads to a modified Polradwinkel, wherein the Polradwinkel is changed such that the achievement of the target coupling angle is supported un ¬ .
Es ist klar, dass Schritt a) und Schritt b) zeitlich zumin¬ dest teilweise überlappen. Schritt b) wird immer dann erfol- gen, wenn es nicht oder nur erschwert, etwa nicht in kurzerIt is clear that step a) and step b) temporally overlap at least partially ¬. Step b) is always carried out when it is not or only difficult, for example not in a short time
Zeit, möglich ist, mit Schritt a) den Zielkuppelwinkel zu er¬ reichen. Schritt a) ist bekannt, so dass hierzu keine weite¬ ren Ausführungen erfolgen. Schritt b) soll näher erläutert werden. Es gibt einen Frei¬ heitsgrad beim Erregungsstrom, der die Erregung der Erregerwicklung hervorruft. Dadurch kann der sogenannte Polradwinkel beeinflusst werden. Unter dem Polradwinkel, auch Lastwinkel genannt, ist allgemein der Winkel zu verstehen, unter dem das Polrad einer Synchronmaschine dem Synchrondrehfeld voreilt. Auf die Einzelheiten soll hier nicht eingegangen werden, da sie dem einschlägigen Fachmann bekannt sind. Wichtig ist zu verstehen, dass durch eine Veränderung des Polradwinkels sich die Blindleistung ändert, aber es möglich bleibt die gefor- derte Wirkleistung bereit zu stellen. Durch die Veränderung des Polradwinkels ist es möglich, der Forderung zu genügen, dass der Generator sich mit Netzfrequenz dreht und zugleich eine Veränderung der Winkellage des Generators und damit der Gasturbine erreichbar ist. Die Erfindung gestattet also, nicht nur die Winkellage der Dampfturbine, sondern auch die Winkellage der Gasturbine zu beeinflussen. Wenngleich im Regelfall nur eine Beeinflussung um wenige Grad möglich ist, wird doch ein zusätzlicher Freiheitsgrad geschaffen, der das Kuppeln mit Zielkuppelwinkel bei Bedarf sehr erleichtern und beschleunigen kann. Is possible time to step a) extend the target dome angle to it ¬. Step a) is known, so that no further explanations are given for this purpose. Step b) will be explained in more detail. There is a free ¬ ness grad excitation current, which causes the excitation of the field winding. As a result, the so-called rotor angle can be influenced. Under the Polradwinkel, also called load angle, is generally the angle to understand, under which the pole of a synchronous machine leads the synchronous rotating field. The details will not be discussed here because they are known to those of ordinary skill in the art. It is important to understand that changing the rotor angle changes the reactive power, but it remains possible to provide the required active power. By changing the Polradwinkels it is possible to meet the requirement that the generator rotates at mains frequency and at the same time a change in the angular position of the generator and thus the gas turbine can be achieved. The invention thus makes it possible to influence not only the angular position of the steam turbine, but also the angular position of the gas turbine. Although usually only an influence of a few degrees is possible, nevertheless an additional degree of freedom is created, which the If required, it is very easy to facilitate and accelerate domes with target dome angles.
Der Polradwinkel ist vom Verhältnis von Wirkleistung und Blindleistung abhängig. Da das Verhältnis von Wirkleistung und Blindleistung von der Erregung, also vom Erregungsstrom abhängt, ist die entsprechende Wahl der Blindleistung bei ge¬ gebener Wirkleistung grundsätzlich gleichbedeutend mit der Aussage den Erregungsstrom entsprechend zu wählen. Die Zusam- menhänge machen deutlich, dass es nicht erforderlich ist, den Polradwinkel unmittelbar zu erfassen. Es genügt im Grunde bei gegebener Wirkleistung die Blindleistung entsprechend zu ändern. Damit kann bei der Regelung auf die ohnehin erfassten Größen Wirkleistung und Blindleistung zurückgegriffen werden. Die Zusammenhänge zwischen Wirkleistung, Blindleistung undThe rotor angle depends on the ratio of active power and reactive power. Since the ratio of active power and reactive power from the excitation, that depends on the excitation current, the appropriate choice of reactive power at ge ¬ specified active power is basically equivalent to choose as saying the excitation current accordingly. The relationships make it clear that it is not necessary to detect the rotor angle directly. It is basically enough to change the reactive power accordingly for a given active power. This can be used in the regulation on the already detected variables active power and reactive power. The relationships between active power, reactive power and
Polradwinkel können einem sogenannten Leistungsdiagramm entnommen werden, wie später noch näher erläutert wird. Polradwinkel can be taken from a so-called performance diagram, as will be explained later.
In einer Ausführungsform wird bei einem Vorauseilen der Gas- turbine in Bezug auf den Zielkuppelwinkel der Erregungsstrom erhöht und bei einem Nacheilen der Gasturbine der Erregungs¬ strom gesenkt. Im Regelfall kann durch Erhöhung der Erregung der Polradwinkel gesenkt werden. Es wird also der Winkel um den das Polrad dem Synchrondrehfeld vorauseilt, gesenkt. Der Generator und damit die Gasturbine werden also gleichsam et¬ was zurückgedreht, so dass das Vorauseilen der Gasturbine in Bezug auf den Zielkuppelwinkel beseitigt. In one embodiment is increased at a run ahead of the gas turbine with respect to the target clutch angle of the excitation current, and reduced at a lag of the gas turbine of the excitation current ¬. As a rule, by increasing the excitation, the rotor angle can be lowered. So it is the angle by which the pole precedes the synchronous rotating field, lowered. The generator and thus the gas turbine are thus, as it were et ¬ turned back, so that eliminates the Vorausilen the gas turbine with respect to the Zielkuppelwinkel.
In einer Ausführungsform wird die Veränderung des Erregungs- Stroms eingesetzt um Schwankungen der Netzfrequenz, welche das Erreichen des Zielkuppelwinkels erschweren, auszuglei¬ chen. Wenngleich grundsätzlich angestrebt wird, die Netzfrequenz möglichst konstant zu halten, in Deutschland beispiels¬ weise wird ein Wert von 50 Hertz angestrebt, so treten den- noch kleine Schwankungen auf. Treten diese während des Kup¬ peins, also gerade auch im Vorfeld des eigentlichen Kuppeins, während die Dampfturbine beschleunigt oder verzögert wird, auf, ist es oft nicht mehr möglich die Beschleunigung der Dampfturbine entsprechend anzupassen. In diesem Fall ist die Veränderung des Erregungsstroms und die damit einhergehende Veränderung des Polradwinkels und somit die Veränderung der Winkellage der Gasturbine sehr wichtig, wenn nicht unver- zichtbar, um zügig mit Zielkuppelwinkel einzukuppeln. In one embodiment, the change of the excitation current is used to fluctuations in the mains frequency, which make it difficult to reach the target clutch angle, auszuglei ¬ chen. Although it is generally desirable to maintain the grid frequency as constant as possible, in Germany a value of 50 hertz example ¬ as is desired, nevertheless still occur small fluctuations. If these occur during the coup ¬ pein, ie just in the run - up to the actual dome, while the steam turbine is accelerating or decelerating, it is often no longer possible to accelerate the Adjust steam turbine accordingly. In this case, the change in the excitation current and the concomitant change in the rotor angle and thus the change in the angular position of the gas turbine is very important, if not indispensable, to engage quickly with target coupling angle.
In einer Ausführungsform ist durch die Veränderung des Erregungsstroms der Winkel der Gasturbine um bis zu 5° veränder¬ bar. Wie bereits erläutert ist die erreichbare Winkeländerung zwar überschaubar, aber eben dennoch wichtig. Es bleibt dabei, dass der wesentliche Freiheitsgrad beim Kuppeln durch die geeignete Beschleunigung der Dampfturbine und den Wahl des Kuppelzeitpunkts gegeben ist. In einer Ausführungsform wird zur Veränderung des Erregungsstroms die Erregerspannung verändert. Dies gestattet eine Be¬ einflussung des Erregerstroms in einfacher Weise. In one embodiment, the angle of the gas turbine by up to 5 ° Variegated ¬ bar by the change of the excitation current. As already explained, the achievable angle change is manageable, but still important. It remains that the essential degree of freedom in coupling is given by the appropriate acceleration of the steam turbine and the choice of dome time. In one embodiment, the excitation voltage is changed to change the excitation current. This allows a Be ¬ influence of the excitation current in a simple manner.
Die obigen Überlegungen können auch für ein Verfahren zum Auskuppeln einer Dampfturbine und einer mit einem Generator verbundenen Gasturbine genutzt werden. Der Generator weist wiederum eine Erregerwicklung auf, deren Erregung durch Veränderung eines durch die Erregerwicklung fließenden Erregungsstroms verändert werden kann. Beim Auskuppeln wird der Erregungsstrom derart verändert, dass die dadurch veränderte Erregung der Erregerwicklung zu einem veränderten Polradwinkel führt, der ein Auskuppeln erleichtert. Wie bereits oben beim Kuppeln beschrieben erlaubt die Veränderung des Polradwinkels eine Verdrehung der Gasturbine. In bestimmten Situa- tionen kann dies beim Auskuppeln, also beim Lösen der Kupplung zwischen Gasturbine und Dampfturbine vorteilhaft sein. Vor allem ist es oft möglich, das Auskuppeln zu beschleunigen. Dies senkt den Verschleiß der Kupplung. Es wird ebenfalls eine Regelungseinrichtung für einen Ein- wellen-Turbosatz mit einer Gasturbine, einer Dampfturbine und einem Generator bereit gestellt. Die Regelungseinrichtung ist derart eingerichtet, dass das oben beschriebene Verfahren zum Kuppeln und/oder Auskuppeln durchführbar ist. Dabei genügen oft marginale Änderungen der ohnehin vorhandenen Regelungseinrichtung. In vielen Fällen kann man sich auf eine andere Programmierung beschränken. Die Implementierung des erfin- dungsgemäßen Verfahrens erfordert somit nur sehr überschau¬ baren Aufwand. Im Normalfall ist auch eine Nachrüstung be¬ stehender Einwellen-Turbosätze, genau genommen der zuge¬ hörigen Regelungseinrichtung problemlos möglich. Weitere Einzelheiten sollen anhand der Figur 1 beschrieben werden, die ein Leistungsdiagramm zeigt, in dem die Zusammenhänge zwischen Blindleistung, Wirkleistung und Polradwinkel dargestellt sind. The above considerations may also be used for a method of disengaging a steam turbine and a gas turbine connected to a generator. The generator in turn has an excitation winding whose excitation can be changed by changing an excitation current flowing through the exciter winding. When disengaging the excitation current is changed so that the resulting change excitation of the exciter winding leads to a modified Polradwinkel that facilitates disengaging. As described above during coupling, the change of the rotor angle allows a rotation of the gas turbine. In certain situations, this may be advantageous when disengaging, ie when releasing the coupling between the gas turbine and the steam turbine. Above all, it is often possible to speed up the disengagement. This reduces the wear of the clutch. A control device for a single shaft turbine set with a gas turbine, a steam turbine and a generator is likewise provided. The control device is set up such that the method described above for Coupling and / or disengaging is feasible. It often suffice marginal changes of the already existing control device. In many cases you can limit yourself to another programming. The implementation of the inventive method thus requires only very überschau ¬ ble effort. Normally, a retrofit be ¬ standing single-shaft turbine sets, strictly speaking, the side ¬ impaired control device is possible. Further details will be described with reference to FIG. 1, which shows a performance diagram in which the relationships between reactive power, active power and rotor angle are shown.
Auf der Rechtswertachse von Figur 1 ist die Wirkleistung in MW aufgetragen. Auf der Hochwertachse ist die Blindleistung im Mvar eingetragen. Die Linie 1 verläuft bei der Blindleis¬ tung 0. Bei den auf der Linie 1 liegenden Betriebspunkten wird also nur Wirkleistung bereitgestellt. Bei den unterhalb der Linie 1 liegenden Betriebspunkten ist die Blindleistung negativ, bei den oberhalb liegenden positiv. Die am Rand endenden Geraden stehen für bestimmte Werte vom Cos phi, wobei phi der Winkel zwischen der im Generator induzierten Spannung und dem daraus resultierenden Strom im Zeigerdiagramm ist. On the right axis of Figure 1, the active power is plotted in MW. The reactive power is entered in the Mvar on the high-value axis. The line 1 runs at the Blindleis ¬ tion 0. In the lying on the line 1 operating points so only active power is provided. For the operating points below line 1, the reactive power is negative, for the above positive. The edges ending at the edge stand for certain values of the Cos phi, where phi is the angle between the voltage induced in the generator and the resulting current in the phasor diagram.
Vorliegend bedeutend sind die von einem links unten liegenden Ursprung 2 ausgehenden Pfeile 3, 4 und 5. Wie ersichtlich enden diese an Betriebspunkten mit derselben Wirkleistung, aber unterschiedlicher Blindleistung. Die Strecke 6 welche die beiden Endpunkte der Pfeile 3 und 5 verbindet, ist ein typi¬ scher Bereich in dem die Blindleistung verstellt werden kann, während die Wirkleistung gleich bleibt. Significant in the present case are the arrows 3, 4 and 5 emanating from an origin 2 at the bottom left. As can be seen, these ends at operating points with the same active power but different reactive power. The track 6 which connects the two end points of the arrows 3 and 5, is a typi ¬ shear area in which the reactive power can be adjusted, while the active power remains the same.
Der Winkel zwischen den Pfeilen 3, 4 sowie 5 und der Hoch- wertachse ist der jeweilige Polradwinkel. Die Lage des Ur¬ sprungs 2 ist messtechnisch bestimmt. Allgemein kann der Polradwinkel im Leistungsdiagramm abgelesen werden, in dem ein Pfeil vom Ursprung 2 zum jeweiligen Betriebspunkt gezogen wird und der Winkel dieses Pfeils zur Hochwertachse bestimmt wird . The angle between the arrows 3, 4 and 5 and the high-value axis is the respective pole wheel angle. The location of Ur ¬ jump 2 is metrologically determined. In general, the rotor angle can be read in the performance diagram, in which an arrow is drawn from the origin 2 to the respective operating point is determined and the angle of this arrow to the high-value axis.
Wird etwa beim Betriebspunkt, der am Ende von Pfeil 4 liegt, gekuppelt und von der Regelung festgestellt, dass die Gastur¬ bine für ein Kuppeln mit dem Zielkuppelwinkel um 2° voraus¬ eilt, dann gilt es den Polradwinkel um 2° zu senken. Wie im Leistungsdiagramm nach Figur 1 ersichtlich, ist hierzu die Blindleistung zu erhöhen. Dafür gilt es die Erregung, also die Erregerspannung und damit den Erregungsstrom soweit abzusenken, bis der Polradwinkel 42° beträgt. Es ist also in ein¬ facher Weise möglich durch eine Änderung der Blindleistung, die durch geänderte Erregung herbeigeführt werden kann, den Polradwinkel zu beeinflussen und damit in verbesserter Weise den Zielkuppelwinkel zu beeinflussen. If, for example, at the operating point, which is at the end of arrow 4, coupled and determined by the regulation that the Gastur ¬ bine for coupling with the Zielkuppelwinkel by 2 ° ahead ¬ rushes, then it is necessary to reduce the Polradwinkel by 2 °. As can be seen in the power diagram according to FIG. 1, the reactive power is to be increased for this purpose. For this, it is the excitation, so the excitation voltage and thus reduce the excitation current as far as until the Polradwinkel is 42 °. It is therefore possible in a ¬ way by a change in the reactive power, which can be brought about by changed excitation, to influence the Polradwinkel and thus to influence the target dome angle in an improved manner.

Claims

Patentansprüche claims
1. Verfahren zum Kuppeln einer mit einem Generator verbun- denen Gasturbine und einer Dampfturbine, 1. A method for coupling a gas turbine connected to a generator and a steam turbine,
wobei der Generator eine Erregerwicklung aufweist, deren Erregung durch Veränderung eines durch die Erregerwicklung fließenden Erregungsstroms verändert werden kann, mit fol¬ genden Schritten: wherein the generator has an exciter winding, the excitation can be varied by varying a current flowing through the field winding excitation current, with fol ¬ constricting steps of:
a) Beschleunigen und/oder Verzögern der Dampfturbine derart, dass das Kuppeln mit einem Zielkuppelwinkel erfolgt; b) bei Bedarf Veränderung des Erregungsstroms, so dass die dadurch veränderte Erregung der Erregerwicklung zu einem veränderten Polradwinkel führt,  a) accelerating and / or decelerating the steam turbine such that the coupling takes place with a target dome angle; b) if necessary, changing the excitation current so that the resulting excitation of the excitation winding leads to a modified rotor angle,
wobei der Polradwinkel derart verändert wird, dass das Er¬ reichen des Zielkuppelwinkels unterstützt wird. wherein the Polradwinkel is changed such that the He ¬ rich the target dome angle is supported.
2. Verfahren nach Anspruch 1, 2. The method according to claim 1,
dadurch gekennzeichnet, dass  characterized in that
bei einem Vorauseilen der Gasturbine in Bezug auf den Ziel¬ kuppelwinkel der Erregungsstrom erhöht wird und bei einem Nacheilen der Gasturbine der Erregungsstrom gesenkt wird. is increased in an advance of the gas turbine with respect to the target ¬ dome angle of the excitation current and is lowered in a lagging of the gas turbine, the excitation current.
3. Verfahren nach einem der vorhergehenden Ansprüche, 3. The method according to any one of the preceding claims,
dadurch gekennzeichnet, dass  characterized in that
die Veränderung des Erregungsstroms eingesetzt wird um Schwankungen der Netzfrequenz, welche das Erreichen des Zielkuppelwinkels erschweren, auszugleichen.  the change in the excitation current is used to compensate for fluctuations in the mains frequency, which complicate the achievement of the target dome angle.
4. Verfahren nach einem der vorhergehenden Ansprüche, 4. The method according to any one of the preceding claims,
dadurch gekennzeichnet, dass  characterized in that
durch die Veränderung des Erregungsstroms der Winkel der Gasturbine um bis zu 5° veränderbar ist. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass can be changed by changing the excitation current of the angle of the gas turbine by up to 5 °. Method according to one of the preceding claims, characterized in that
zur Veränderung des Erregungsstroms die Erregerspannung verändert wird. to change the excitation current, the excitation voltage is changed.
Verfahren zum Auskuppeln einer Dampfturbine und einer mit einem Generator verbundenen Gasturbine, Method for disengaging a steam turbine and a gas turbine connected to a generator,
wobei der Generator eine Erregerwicklung aufweist, deren Erregung durch Veränderung eines durch die Erregerwicklung fließenden Erregungsstroms verändert werden kann, the generator having a field winding whose excitation can be varied by changing an excitation current flowing through the field winding,
wobei der Erregungsstrom derart verändert wird, dass die dadurch veränderte Erregung der Erregerwicklung zu einem veränderten Polradwinkel führt, der ein Auskuppeln erleich tert . wherein the excitation current is changed such that the resulting change excitation of the exciter winding leads to a modified Polradwinkel, tert tert a uncoupling.
Regelungseinrichtung für einen Einwellen-Turbosatz mit einer Gasturbine, einer Dampfturbine und einem Generator, derart eingerichtet, dass ein Verfahren nach einem oder mehreren der vorhergehenden Ansprüche durchführbar ist. Control device for a single-shaft turbine set with a gas turbine, a steam turbine and a generator, arranged such that a method according to one or more of the preceding claims is feasible.
EP15774921.9A 2014-10-20 2015-10-05 Coupling of a gas turbine and a steam turbine with target coupling angle with adjustment of the pole wheel Not-in-force EP3183434B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15774921T PL3183434T3 (en) 2014-10-20 2015-10-05 Coupling of a gas turbine and a steam turbine with target coupling angle with adjustment of the pole wheel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14189509.4A EP3012419A1 (en) 2014-10-20 2014-10-20 Coupling of a gas turbine and a steam turbine with target coupling angle with adjustment of the pole wheel
PCT/EP2015/072913 WO2016062530A1 (en) 2014-10-20 2015-10-05 Coupling a gas turbine and a steam turbine with a target coupling angle by adjusting the polar wheel angle

Publications (2)

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EP3183434A1 true EP3183434A1 (en) 2017-06-28
EP3183434B1 EP3183434B1 (en) 2018-06-27

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EP15774921.9A Not-in-force EP3183434B1 (en) 2014-10-20 2015-10-05 Coupling of a gas turbine and a steam turbine with target coupling angle with adjustment of the pole wheel

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EP (2) EP3012419A1 (en)
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KR (1) KR20170073646A (en)
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PL (1) PL3183434T3 (en)
RU (1) RU2675023C2 (en)
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Publication number Priority date Publication date Assignee Title
US5483147A (en) * 1992-07-10 1996-01-09 Massachusetts Institute Of Technology Decentralized excitation control for an electrical power utility system
US6230480B1 (en) 1998-08-31 2001-05-15 Rollins, Iii William Scott High power density combined cycle power plant
RU2248453C2 (en) * 1998-08-31 2005-03-20 III Вильям Скотт Роллинс Electric power station and method of power generation with combination of cycles
JP2003013709A (en) * 2001-06-28 2003-01-15 Mitsubishi Heavy Ind Ltd Clutch engagement detector and uniaxial combined plant with the detector
JP3716244B2 (en) 2002-09-19 2005-11-16 三菱重工業株式会社 Operation control apparatus and operation control method for single-shaft combined plant provided with clutch.
JP3930462B2 (en) * 2003-08-01 2007-06-13 株式会社日立製作所 Single-shaft combined cycle power generation facility and operation method thereof
EP1911939A1 (en) * 2006-10-09 2008-04-16 Siemens Aktiengesellschaft Coupling action control with coupling angle
US8176723B2 (en) 2008-12-31 2012-05-15 General Electric Company Apparatus for starting a steam turbine against rated pressure
EP2447482A1 (en) * 2010-10-29 2012-05-02 Siemens Aktiengesellschaft Method for shutting down a turbo-generating set
JP5710530B2 (en) 2012-03-19 2015-04-30 株式会社協和コンサルタンツ Wind power generation system
WO2014125592A1 (en) 2013-02-14 2014-08-21 三菱重工業株式会社 Wind farm and method for operating and device for controlling same
AU2015289392B2 (en) * 2014-07-18 2017-12-21 Eip Technologies, Inc. Direct wind energy generation

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JP6518775B2 (en) 2019-05-22
PL3183434T3 (en) 2019-05-31
RU2017113069A (en) 2018-10-17
JP2017534242A (en) 2017-11-16
WO2016062530A1 (en) 2016-04-28
RU2017113069A3 (en) 2018-10-17
RU2675023C2 (en) 2018-12-14
KR20170073646A (en) 2017-06-28
CN107075972B (en) 2019-10-18
EP3012419A1 (en) 2016-04-27
CN107075972A (en) 2017-08-18
EP3183434B1 (en) 2018-06-27
US20170306800A1 (en) 2017-10-26
US10253655B2 (en) 2019-04-09

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