[go: up one dir, main page]

EP0684366B1 - Procédé et système pour la commande et la régulation de la puissance d'une centrale à vapeur - Google Patents

Procédé et système pour la commande et la régulation de la puissance d'une centrale à vapeur Download PDF

Info

Publication number
EP0684366B1
EP0684366B1 EP95107786A EP95107786A EP0684366B1 EP 0684366 B1 EP0684366 B1 EP 0684366B1 EP 95107786 A EP95107786 A EP 95107786A EP 95107786 A EP95107786 A EP 95107786A EP 0684366 B1 EP0684366 B1 EP 0684366B1
Authority
EP
European Patent Office
Prior art keywords
output
pressure
controller
control
initial pressure
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 - Lifetime
Application number
EP95107786A
Other languages
German (de)
English (en)
Other versions
EP0684366A1 (fr
Inventor
Rudolf Sindelar
Lothar Vogelbacher
Ralph Kneidl
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP0684366A1 publication Critical patent/EP0684366A1/fr
Application granted granted Critical
Publication of EP0684366B1 publication Critical patent/EP0684366B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a method for model-based Control and regulation of the output of a steam power plant block according to the preamble of claim 1.
  • the invention relates to a device for Execution of the procedure.
  • Such a method is known from DE 36 32 041 C2.
  • This Procedures including a supplement that relates to a procedure for restoring the turbine reserve after the correction of a power setpoint change relates, is also known from DE 41 24 678 C2.
  • the known The method is particularly suitable for frequency control by changing the power setpoint in a steam power plant block, for example due to a drop in network frequency, in compliance with requirements to the dynamic performance of the Deutsche Verbundippo eV, Heidelberg, (DVG) in the publication "Das supply-oriented behavior of thermal power plants ", DVG, October 1991.
  • the DVG requirements in particular the defined dynamics in the event of a change in performance the method according to the invention should also suffice.
  • EP-A2-0100 532 describes a method for regulating the power of a steam power plant block with a once-through steam generator known.
  • the fuel supply to the steam generator is regulated by a power regulator; a to control parallel control of the fuel supply takes place Not. Not even direct or indirect control of the turbine inlet valves.
  • the process works with a pre-pressure control.
  • the specified pressure setpoint is determined by a pressure correction signal influenced.
  • the turbine intake valves are now proceed in such a way that steam is emitted or removed as required is saved.
  • the correction signal is with a electrical replica of the model Steam generator behavior formed.
  • the replica is as Input signal the control signal of the power controller supplied.
  • This is only a small degree of coordination of pressure setpoint and fuel supply.
  • the dynamic behavior of the power controller output signal is not just about the performance of the Controlled system, but also on the parameters of the Power controller.
  • the invention is based on the method DE 36 32 041 C2 is based on the task of further development specify a faster control of heating faults enables and also a variant for fixed pressure operation allows. Compliance with the DVG requirements including an at least monotonous transition to a a new level of performance should also continue to exist as well as a predominantly controlled intervention in the process. In addition, a facility is to carry out the procedure can be specified.
  • This task is carried out in a method for control and Regulation of the output of a steam power plant block after Preamble of claim 1 by its characterizing Features resolved.
  • Advantages of the method according to the invention exist under another in that by including the form regulation a very fast and stable adjustment and therefore also stable maintenance of the FD pressure, which is subject to the heating disturbances, and by a good to the respective operating mode adapted replication of the controlled system behavior a practical only controlled transition to a new level of performance is achieved.
  • the steam pressure setpoint is not only the error of the process model is practically eliminated, but the whole block control more stable.
  • the procedure can be universal with several for one selectable modes set up facility, as well with a simplified, for a certain operating mode equipped control and regulation device performed will.
  • 1 and 2 show a universal for different Operating modes adjustable control and regulating device, 1 shows an overall arrangement, whose process model is shown in detail in FIG. 2.
  • a model shown in FIGS. 1 and 2, referred to as a universal process model or universal predictor 100, is supplied as input signals: A fuel control signal B, the power control deviation P d and a predetermined power setpoint P V.
  • Output signals are - depending on operating mode switches 115 to 119 - a turbine inlet valve control signal S, a power setpoint P S , a pressure setpoint signal D, a vapor pressure setpoint p S and a pressure setpoint component D S.
  • the overall arrangement also contains further operating mode switches 118 to 120 and 125 to 129, which with the aid of a Operating mode selector 121 can be operated.
  • the mode selector 121 contains two lines with keys, with each line making a selection by pressing a key must become.
  • the invention relates to a further development of the process and the facility, which are already known from DE 36 32 041 C2. Furnishing components, that are already described there and also used again in the device according to the invention are matched to facilitate understanding Provide reference numerals. Also signal names were taken over.
  • the fuel control signal B is in a function generator 33a, 33b depending on required changes in performance and formed with an adapted override.
  • the predetermined power P V supplied as a further input signal to the process model 100 is the output signal of a function generator 19b which ensures an at least monotonous increase in the block power P.
  • the input signal of the function generator 19b is a step amplitude X, which is supplied by a power increase limiter, which takes into account the energy reserve given by throttling.
  • the process model 100 contains several function formers, namely a function generator 30 with a transfer function between vapor pressure and fuel, a function builder 22 with a transfer function between electrical Power and fuel, a function builder 28 with a transfer function between steam pressure and valve position, a function generator 102 with a transfer function between valve position and steam pressure, one Function generator 103 with a transfer function between Valve position and electrical power and one Function generator 21 also with a transfer function between turbine valve position and electrical power.
  • Other components of the process model 100 are one P controller 63, addition points 20, 29, 106 to 109, 104 and 114, a selector 105 and a multiplier 111.
  • the electrical circuit of the components and the mode of operation the device is set by the switch positions fixed.
  • Pressing the a and F buttons selects an operating mode "turbine leads, boiler follows, fixed pressure".
  • the pressure regulator 4 receives its setpoint from the addition point 124, the coupling signal D S formed in the process model 100 causing the pressure regulator 4 to become inactive.
  • the positioner 3 is switched off.
  • the power regulator 2 and the pressure regulator 4 have a corrective action on the fuel.
  • the control signals B and S are used for control.
  • the valve control signal S acts on the turbine control valves by means of the setpoint of the positioner 3 (switch 127 / b, 125 / b).
  • the power regulator 2 has a corrective effect on the pressure setpoint (switch positions 120 / b, 119 / b, 126 / b, 129 / G) and the pressure regulator 4 (switch 128 / b) on the fuel via the addition point 8.
  • This mode of operation is known from DE 36 32 041, apart from the control deviation P d being applied to the power controller 2 by means of addition point 121 to the setpoint of the positioner 3.
  • the method variants VG and VF described below are inventive.
  • the desired inactivity of the admission pressure regulator 101 during the control by the pressure setpoint p S supplied by the process model 100 is achieved - in contrast to the arrangement according to FIG. 4 - by the direct control of the turbine valves by means of the valve control signal S and the connection at the addition point 9. Since the pressure setpoint p S has the same time profile as the actual pressure, the control deviation at the addition point 110 is practically zero.
  • the operating mode is activated by pressing the V and F keys "Boiler leads, turbine follows, fixed pressure, pre-pressure control" chosen. Analogous to the aforementioned VG mode, too here the trubine control valves directly through the control signal S controlled.
  • FIG. 3 shows a modification of the arrangement for the case that the realization of the summation point 9 is not possible is.
  • the turbine control valves can then only indirectly, d. H. by means of the targeted adjustment of the respective controller 101 or 2 can be controlled.
  • a switch 140 brought into the position corresponding to the operating mode and the valve control signal S by function generator 141 or 142 dynamically deformed additively to the respective Setpoint is applied via addition points 143 or 144.
  • the dynamic deformation by the function generator 141 or 142 takes place with the inverse transfer function of the respective Controller 101 or 2.
  • Fig. 5 shows a simplified one provided with reference numeral 133F Execution of the process model for a fixed printing company with pre-pressure control. Deviating from the arrangement 1, a controlled system 1b is considered here in addition to the power plant block 1 includes the admission pressure regulator 101. The dynamic behavior of the controlled system 1b is determined by reproduced a function generator 131. How it works 5 is described below.
  • the fuel is controlled by control signal B. Its effect on the increase in output when the primary pressure regulator 101 is switched on is simulated by the function generator 131.
  • a power unit P pS is formed, which is to be removed from the boiler by targeted control of the pressure setpoint p S.
  • the required time profile of the pressure setpoint p S is determined by a function generator 132 as component p S , V. This pressure setpoint component p S , V is added at the addition point 109 to the fixed pressure setpoint, the nominal pressure setpoint p S , N.
  • the power control deviation P d remains zero.
  • the power controller 2 has a corrective action on the fuel mass flow m ⁇ B via the addition point 8.
  • the control deviation is added to the pressure setpoint via the addition point 108 after amplification by the multiplier 111.
  • Fig. 4 shows a very similar arrangement as Fig. 5, but for a sliding pressure operation with upstream pressure control.
  • the nominal pressure value p S is switched in this case, instead of the nominal pressure value p S, N at the summation point 109, a control signal D B.
  • the control signal D B is formed in a function generator 136; its course over time corresponds to the change in live steam pressure in response to the fuel mass flow m ⁇ B changed by the control (B).
  • the power component P B is formed in a function generator 134 adapted to the sliding pressure operation.
  • process models 133G, 133F shown in FIGS. 4 and 5 are each set up for a specific operating mode, all of the operating modes described above can be operated with the universal process model 100 according to FIG. 3.
  • the simulation of the power component P B for sliding pressure and fixed pressure takes place differently, depending on the position of the switch 115.
  • the signals from the function formers 102 and 103 are zero when the switch 115 is in the G position. If the FD pressure simulated by the function generator 30 after a power increase by the fuel control signal B exceeds the nominal pressure setpoint p S , N , the difference present is detected by means of the selection element 105 and the addition point 106.
  • the function generator 102, 103 and the addition point 104 firstly activate the simulation of the power component P B for the fixed pressure and secondly the turbine control valves are opened further by the signal S p .
  • switch 115 For operation with fixed pressure in the entire power control range of the power plant block, switch 115 is in the F position bring and here are the output signals the function generator 102 and 103 changed performance.
  • the signal S Y stores the power from the boiler and the signal S Y in turn is brought to zero by the effect of the respective feedback mentioned above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feedback Control In General (AREA)
  • Control Of Turbines (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Claims (7)

  1. Procédé de commande et de régulation de la puissance d'un bloc de centrale thermique à vapeur (1) à l'aide d'un dispositif de commande et de régulation comprenant un modèle de processus (100, 133) qui reproduit le comportement dynamique du processus de la centrale et un régulateur de puissance (3),
    a) une réserve d'énergie, obtenue par diminution de l'ouverture des vannes d'admission de turbine, étant constituée et utilisée avec une composante de puissance qui garantit une augmentation de puissance avec un passage strictement monotone ou au moins sensiblement monotone à un niveau de puissance supérieur et
    b) un passage à un nouveau niveau de puissance ayant lieu essentiellement de manière commandée, à l'aide de signaux (B, S) pour une action commandée sur l'alimentation en combustible et sur la position des vannes de turbine, de sorte que le dispositif de régulation reste dans une large mesure inactif,
    caractérisé par le fait qu'il comporte une régulation de pression d'admission de vapeur vive à l'aide d'un régulateur de pression d'admission (101),
    c) le modèle de processus (100, 133) formant une valeur de consigne de pression de vapeur (pS) pour le régulateur de pression d'admission (101), celle-ci ayant pour effet que le régulateur de pression d'admission (101) reste également dans une large mesure inactif,
    d) la valeur de consigne de pression de vapeur (pS) étant formée de manière différente pour le fonctionnement à pression glissante et pour le fonctionnement à pression constante,
    e) l'écart de réglage (pd) du régulateur de puissance (2), lequel agit directement et de manière corrective sur l'alimentation en combustible, étant combiné de manière additive (108) à la valeur de consigne de pression de vapeur (pS) et
    f) le signal de sortie du régulateur de pression d'admission (101) étant combiné de manière additive (9) au signal de commande (S) pour former le signal de réglage (Y) pour les vannes d'admission de turbine.
  2. Procédé selon la revendication 1, caractérisé par le fait qu'en fonctionnement à pression constante, on forme la valeur de consigne de pression de vapeur (pS) sur la base d'une simulation de la variation de la pression de vapeur (FBp)G prévisible en réaction à une alimentation en combustible modifiée.
  3. Procédé selon la revendication 1, caractérisé par le fait qu'en fonctionnement à pression glissante, on forme la valeur de consigne de pression de vapeur (pS) sur la base d'une simulation de la variation de la puissance (FBp)G prévisible en réaction à une alimentation en combustible modifiée.
  4. Procédé selon une des revendications précédentes, modifié en ce qu'on ne combine pas de manière additive le signal de sortie du régulateur de pression d'admission (101) avec le signal de commande (S) pour former le signal de réglage (Y) des vannes d'admission de turbine, mais on combine de manière additive (143, 144) le signal de commande (S), déformé dynamiquement avec la fonction de transfert inverse (1/FR) du régulateur de puissance ou du régulateur de pression d'admission, avec la valeur de consigne (PS, pS) concernée.
  5. Procédé selon une des revendications 1 à 3, caractérisé par le fait qu'on ne combine pas de manière additive le signal de sortie du régulateur de pression d'admission (101) avec le signal de commande (S) pour former le signal de réglage (Y) des vannes d'admission de turbine, mais on utilise directement le signal de sortie du régulateur de pression d'admission (101) comme grandeur réglante (Y) pour le réglage des vannes d'admission de la turbine.
  6. Dispositif de commande et de régulation de la puissance (P) d'un bloc de centrale thermique à vapeur (1) comportant les composants suivants:
    a) un modèle de processus (100) qui, sur la base d'une valeur de consigne de puissance (pV) imposée, provoquant une augmentation de puissance strictement monotone ou au moins sensiblement monotone, forme des signaux de commande (B, S) pour une commande de l'alimentation en combustible (mB) et de la position des vannes d'admission de turbine (Y),
    b) un régulateur de puissance (2),
    c) un régulateur de position de vanne d'admission de turbine (3)
    d) un régulateur de pression de vapeur (4),
    caractérisé par le fait
    e) qu'un régulateur de pression d'admission de vapeur vive (101) est en outre prévu,
    f) que le modèle de processus (100) est réalisé sous forme de modèle universel avec possibilité de réglage sur chacun des modes de fonctionnement (F, G, V, a, b) énumérés sous les caractéristiques g) et h),
    g) que des moyens (115, 116, 121, 129) sont prévus pour commuter de manière sélective sur l'un des modes de fonctionnement à pression glissante (G) ou à pression constante (F),
    h) que des moyens (117 à 121, 125 à 128) sont prévus pour commuter de manière sélective sur l'un des modes de fonctionnement "Régulation de la pression d'admission de vapeur vive" (V) ou "Turbine mène, Chaudière suit" (a) ou "Chaudière mène, turbine suit" (b).
  7. Dispositif de commande et de régulation de la puissance (P) d'un bloc de centrale thermique à vapeur (1d) comprenant les composants suivants:
    a) un modèle de processus (133F, 133G) qui, sur la base d'une valeur de consigne de puissance (PV) imposée, provoquant une augmentation de puissance strictement monotone ou au moins sensiblement monotone, forme un signal de commande (B) pour une commande de l'alimentation en combustible (mB) et
    b) un régulateur de puissance (2),
    caractérisé par le fait
    c) qu'un régulateur de pression d'admission de vapeur vive (101) est prévu dans le bloc de centrale thermique à vapeur (1d), lequel régulateur fournit une grandeur réglante (Y) pour le réglage des vannes d'admission de turbine et
    d) que le modèle de processus (133F, 133G) comporte des moyens (131, 20, 132, 108, 109) pour le fonctionnement à pression constante et des moyens (134 à 135, 20, 108, 109, 111) pour le fonctionnement à pression glissante pour former une valeur de consigne de pression de vapeur vive (pS) dépendante de la chaleur, de la puissance ou du combustible, qui est transmise en tant que valeur de consigne au régulateur de pression d'admission (101).
EP95107786A 1994-05-26 1995-05-22 Procédé et système pour la commande et la régulation de la puissance d'une centrale à vapeur Expired - Lifetime EP0684366B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4418298 1994-05-26
DE4418298A DE4418298A1 (de) 1994-05-26 1994-05-26 Verfahren und Einrichtung zur Steuerung und Regelung der Leistung eines Dampfkraftwerksblocks

Publications (2)

Publication Number Publication Date
EP0684366A1 EP0684366A1 (fr) 1995-11-29
EP0684366B1 true EP0684366B1 (fr) 1998-01-07

Family

ID=6518962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95107786A Expired - Lifetime EP0684366B1 (fr) 1994-05-26 1995-05-22 Procédé et système pour la commande et la régulation de la puissance d'une centrale à vapeur

Country Status (4)

Country Link
EP (1) EP0684366B1 (fr)
CZ (1) CZ288540B6 (fr)
DE (2) DE4418298A1 (fr)
PL (1) PL176577B1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1647677B1 (fr) * 2004-10-12 2013-02-20 Siemens Aktiengesellschaft Méthode pour simuler les caractéristiques de fonctionnement d'une installation de turbine à vapeur
EP1647676B1 (fr) * 2004-10-12 2013-03-27 Siemens Aktiengesellschaft Méthode pour simuler les caractéristiques de fonctionnement d'une installation de turbine à vapeur
CN105116720B (zh) * 2015-09-23 2017-10-03 云南电力试验研究院(集团)有限公司 火电机组压控阀控方式一次调频主汽压力自适应优化方法
CN110635493A (zh) * 2019-09-19 2019-12-31 国网天津市电力公司电力科学研究院 一种燃机气门调频快速响应控制方法
CN114458398B (zh) * 2022-01-27 2023-11-03 中广核工程有限公司 汽轮机阀门的控制方法、装置、控制设备、汽轮机和介质

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228996A1 (de) * 1982-08-03 1984-02-09 Siemens AG, 1000 Berlin und 8000 München Verfahren und einrichtung zur leistungsregelung an einem kraftwerksblock
DE3304292A1 (de) * 1982-10-11 1984-04-12 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und vorrichtung zum ausregeln von netzfrequenzeinbruechen bei einem gleitdruckbetriebenen dampfkraftwerkblock
DE3632041A1 (de) * 1985-10-03 1987-04-09 Bbc Brown Boveri & Cie Verfahren und einrichtung zur regelung der leistung eines dampfkraftwerkblocks
DE3541148C3 (de) * 1985-11-21 1995-12-07 Man Energie Gmbh Verfahren zur Regelung einer Dampfturbine

Also Published As

Publication number Publication date
PL308739A1 (en) 1995-11-27
DE4418298A1 (de) 1995-11-30
CZ134895A3 (en) 1996-01-17
CZ288540B6 (cs) 2001-07-11
EP0684366A1 (fr) 1995-11-29
PL176577B1 (pl) 1999-06-30
DE59501200D1 (de) 1998-02-12

Similar Documents

Publication Publication Date Title
DE3116340C2 (de) Verfahren und Regeleinrichtung zum Begrenzen der bei Belastungsänderungen auftretenden thermischen Beanspruchung von Bauteilen einer Dampfturbine
EP0642707B1 (fr) Procede et dispositif de regulation d'un ensemble turbine-generateur
DE2817322A1 (de) Pi-regelsystem
DE2438930A1 (de) Verfahren zum betrieb mindestens zweier haupt-einlassventile und einer mehrzahl reglerventile einer dampfturbinenanordnung
EP1174591A1 (fr) Procédé de régulation primaire avec des centrales combinées avec turbines à gaz et à vapeur
DE3632041C2 (fr)
DE2025528C3 (de) Regeleinrichtung für eine Dampfturbinen-Kraftanlage
EP0100532B1 (fr) Procédé et dispositif pour la régulation de la puissance d'une centrale
EP0684366B1 (fr) Procédé et système pour la commande et la régulation de la puissance d'une centrale à vapeur
EP1053512B1 (fr) Procede et dispositif pour reguler le fonctionnement d'un groupe electrogene a turbine a gaz, en particulier de centrales electriques a gaz et a vapeur
DE3037780A1 (de) Verfahren und system zum regeln des betriebes einer anzapfdampfturbine
DE4344118C2 (de) Verfahren und Einrichtung zur Steuerung und Regelung der Dampfkraftwerksleistung unter Einsatz von Kondensatstopp
DE2900336A1 (de) Verfahren und einrichtung zum steuern von ventilen einer dampfturbine bei einem betriebsartwechsel
DE102004058171A1 (de) Verfahren und Modul zum vorrausschauenden Anfahren von Dampfturbinen
EP3101250A1 (fr) Opération d'une turbine à gaz à écart interpolé de ligne d'opépartions
DE2908147C2 (de) Raumgerät, das über Leitungen mit einem witterungsgeführten Regler zum Regeln der Vorlauftemperatur verbunden ist
DE3541148C2 (fr)
DE4124678C2 (fr)
EP0842350B1 (fr) Systeme de regulation du regime d'une turbine et procede de regulation du regime d'une turbine pendant un delestage
DE2356390C2 (de) Verfahren zur Steuerung des Betriebs einer Dampfturbine
DE4023900A1 (de) Vorrichtung zum regeln einer turbine
DE3716259C2 (fr)
DE1426803A1 (de) Elektrohydraulische Regeleinrichtung fuer eine Dampfturbine
EP1165951B1 (fr) Procede de regulation d'une turbine a vapeur a soutirage de vapeur, dispositif de regulation y relatif et turbine a vapeur a soutirage de vapeur
EP0107774A1 (fr) Dispositif de régulation pour une installation de chauffage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950926

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19970623

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59501200

Country of ref document: DE

Date of ref document: 19980212

ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980209

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20140521

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20140529

Year of fee payment: 20

Ref country code: FR

Payment date: 20140527

Year of fee payment: 20

Ref country code: DE

Payment date: 20140521

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59501200

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20150521

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20150521