[go: up one dir, main page]

WO1998014843A1 - Dispositif de surveillance pour un systeme de regulation de l'acheminement d'un fluide de travail a une turbine, notamment a une turbine a gaz - Google Patents

Dispositif de surveillance pour un systeme de regulation de l'acheminement d'un fluide de travail a une turbine, notamment a une turbine a gaz Download PDF

Info

Publication number
WO1998014843A1
WO1998014843A1 PCT/DE1997/002222 DE9702222W WO9814843A1 WO 1998014843 A1 WO1998014843 A1 WO 1998014843A1 DE 9702222 W DE9702222 W DE 9702222W WO 9814843 A1 WO9814843 A1 WO 9814843A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
logic
monitoring device
output
control element
Prior art date
Application number
PCT/DE1997/002222
Other languages
German (de)
English (en)
Inventor
Gerhard RÜHL
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1998014843A1 publication Critical patent/WO1998014843A1/fr

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D1/00—Measuring arrangements giving results other than momentary value of variable, of general application
    • G01D1/18—Measuring arrangements giving results other than momentary value of variable, of general application with arrangements for signalling that a predetermined value of an unspecified parameter has been exceeded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42306—Excess in error, compare reference with feedback
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42319—What kind of actuator failure

Definitions

  • Turbines have actuating devices with which the supply of the drive medium to the turbine is regulated.
  • the actuators generally contain an actuating element for the drive medium, in particular an actuating valve, and an associated position control loop for the actuating element. Faults, particularly in the position control loop for the control element, must be recognized quickly and reliably. This is particularly true for gas turbines. Since these are often operated in one working point in which the maximum load capacity of the
  • Turbine drive medium actuator malfunctions can have various causes. On the one hand, e.g. due to a failure of the positioner, the control signal provided for the control element is missing at the output of the positioner. On the other hand, the one supplied to the positioner
  • the invention has for its object to provide an electrical monitoring circuit, with which the occurrence of Malfunctions of the actuator can be recognized quickly and safely.
  • FIG. 1 shows a basic illustration of the control device for a turbine with positioner and control element, and a basic circuit diagram of the monitoring device according to the invention
  • FIG. 3 shows a further, advantageous two-channel version of the monitoring device according to the invention.
  • FIG. 1 a basic illustration of a gas turbine is shown by way of example under reference numeral 24.
  • This has a combustion chamber 27 which is supplied with a drive medium via a feed 32, i.e. a combustion gas.
  • the combustion chamber 27 is additionally supplied with combustion air from the left-hand side via a feed 25 and a compressor 26.
  • a feed 32 i.e. a combustion gas.
  • the combustion chamber 27 is additionally supplied with combustion air from the left-hand side via a feed 25 and a compressor 26.
  • the actual turbine part 28 adjoins the combustion chamber 27, which quasi ends with the gas outlet 29.
  • Compressor 26 and turbine part 28 are generally connected to a generator 31 via a turbine shaft 30.
  • An adjusting device 39 for the drive medium of the turbine is arranged in the feed 32. This contains an actuator 33 for the drive medium, in particular a hydraulic valve, and a hydraulic or electric actuator 35 for the actuator 33.
  • a position control circuit generates an actuating signal 13, which acts on the actuator 35 of the actuating device 39.
  • the position control circuit contains a position controller 34, to which the deviation of an actual position value 1 and a position setpoint 36 tapped at the valve 33 for the gas supply 32 of the gas turbine 24 is supplied.
  • a control signal 13 for the control valve 33 is finally formed at the output of the positioner 34.
  • the monitoring device 37 according to the invention for the adjusting device consisting of the position control circuit and the adjusting element 39 has a signal converter 2 which has at least a differentiating transmission behavior, i.e. at least a so-called DTI behavior.
  • the position transducer 1 is supplied to the signal converter 2 at the output of the actuating element 35 as an input variable.
  • the monitoring device 37 according to the invention also contains a logic evaluation circuit 38. These are at least the signal 6 at the output of the signal converter 2 and that for the
  • Control element 35 in the control device 39 certain control signal 13 supplied.
  • the logic evaluation circuit 38 generates a fault signal 18 at the output by comparing the two input signals 1 and 13 at least when, despite the presence of an actuating signal 13, the signal 6 at the output of the signal converter 2 has no appreciable amount. In this way, a divergence between control signal 13 and actual position value 2 can be detected quickly and reliably. If, for example, the monitoring device 37 detects the occurrence of a control signal 13 without a corresponding change in the actual position value 1, detected by an output signal 6 on the signal converter 2, a fault signal 18 is emitted.
  • the logic evaluation circuit 38 has, as further elements, a first and a second minimum value detector 7 and 14.
  • the first minimum value detector 7 is supplied with the signal 6 at the output of the signal converter 2.
  • the minimum value detector 7 outputs at least one active first binary signal 8 at the output when the supplied signal 6 has an amount that is greater than a first minimum value.
  • a threshold of approximately 5% of the measuring range can advantageously be specified as the first minimum value.
  • the control signal 13 intended for the actuating device 39 or its actuator 35 is fed to the second minimum value detector 14.
  • the minimum value detector 8 outputs at least one active second binary signal 9 at the output if the supplied control signal 13 has an amount that is greater than a second minimum value.
  • a threshold of approximately 25% of the measuring range can advantageously be specified as the second minimum value.
  • a logic comparison circuit 17 following the two minimum value detectors 7 and 8 generates a fault signal 18 at least when the first binary signal 8 is inactive and the second binary signal 9 is active.
  • the logic comparison circuit 17 contains at least one logic AND gate, to which the first binary signal 8 at the output of the first minimum value detector 7 is supplied in inverted form and the second binary signal 9 at the output of the second minimum value detector 8 in unchanged form become.
  • An actuating signal 13 with a sufficient size lying above a background noise is detected by an active second binary signal.
  • An active fault signal 18 then appears at the output of the logic AND gate 17 of the logic comparison circuit when, in such a case, the detection of the absence of a change in the actual position value 1 causes an inactive state of the first binary signal 8.
  • the logic evaluation circuit 38 of the monitoring device has two separate monitoring channels for separate monitoring of the actuating device 39 in the event of a positive actuating movement in the direction of the open or a negative actuating movement in the direction of the closed state.
  • the signal channel for positive positioning movements being provided with the reference symbol 40 and the signal channel for negative positioning movements being provided with the reference symbol 42.
  • a first logic signal 41 is then generated from these signal channels when there is a positive actuating movement of the actuating element and a second logic alarm signal 43 when there is a negative actuating movement of the actuating element.
  • the two logic signal signals 41, 43 at the output of the monitoring channels 40, 42 are finally combined via a logic gate, in particular a logic OR gate 21, to form the fault signal 18.
  • both minimum value detectors 7 and 14 each have a two-channel output, each providing a pair of binary signals 81, 82 and 91, 92, respectively. So the binary sig- signals 81 or 91 at the output of the minimum value detector 7 or 14 are active if a positive change 6 of the actual position value is exceeded by exceeding a positive threshold value of e.g.> 5% and a positive change of the control signal 13 for by exceeding a positive threshold value of e.g.> 25% the actuator is detected.
  • the binary signals 82 and 92 at the output of the minimum value detector 7 and 14 are active if a negative change 6 in the actual position value is undershot by falling below a negative threshold value, for example, and a drop below a negative threshold value of, for example,> -25% negative change in the control signal 13 for the actuator is detected.
  • the two minimum value detectors 7, 14 thus each generate a pair of first and second binary signals 81, 82 and 91, 92, respectively, a signal from each pair, in the example of FIG. 3, the signals 81 and 91, when the actuating element moves 39 in the direction of the open state and the other signals of the pairs, in the example of FIG. 3 the signals 82 and 92 are active when the actuating element 39 moves in the direction of the closed state.
  • the signals 81 and 91, which are active when the actuating element 39 moves in the direction of the open state are advantageously fed to the first logic comparison means 44, which are in the logic in the first monitoring channel 40
  • Comparison circuit 17 are arranged. These activate the monitoring device according to the invention in the case of a positive adjusting direction for the generation of a fault signal 18. Furthermore, in the advantageous circuit of FIG. 3, the signals 82 and 92 which are active when the actuating element 39 moves in the direction of the closed state are fed to second logic comparison means 45 which are arranged in the second monitoring channel 42 in the logic comparison circuit. These activate the monitoring device according to the invention in the case of a negative setting direction for the generation of a fault signal 18. According to a further embodiment, which has also already been illustrated in the example in FIG. 3, the monitoring device according to the invention contains means 10 for detecting the reaching of an end position of the actuating element 39 in the open and closed state. In the example in FIG.
  • the actual position value 1 of the actuating element 33 is evaluated by the means 10.
  • the means 10 block the first logical comparison means 44 for generating a fault signal 18 when the end position of the control element 33 is reached in the open state, ie the control element is fully open at the positive stop.
  • the means 10 have a comparator 101 which emits an inactive signal which blocks the first logical comparison means 44 when the actual position value 1 of the adjusting element 33 has exceeded a value of, for example, 98% of the adjusting range.
  • the means 10 block the second logical comparison means 45 for generating a fault signal 18 when the end position of the actuating element 33 is reached in the closed state, ie the actuating element is fully closed at the negative stop.
  • the means 10 have a further comparator 102 which emits an inactive signal which blocks the second logical comparison means 45 when the actual position value 1 of the adjusting element 33 has fallen below a value of, for example, 2% of the adjusting range.
  • the logic comparison circuit 17 advantageously has delay means which only release a fault signal 18 after a predetermined delay time has elapsed, and otherwise suppress a fault signal 18 at the output of the monitoring device 37 if it has become inactive before the delay time has expired.
  • the delay means contain adjustable binary time elements 22, 23, one of which is arranged in each of the first logic comparison means 44 of the first signal channel 40 and one in the second logic comparison means 45 of the second signal channel 42.
  • the logic comparison means 44 and 45 each contain a logic AND gate 19 and 20 at the inputs, with which the binary signals 81, 91 and 82, 92 are combined by the minimum value detectors 7 and 14, respectively.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Devices In Control Systems (AREA)
  • Control Of Turbines (AREA)

Abstract

Le dispositif de surveillance (37) comprend un convertisseur de signal (2) qui présente une réponse (DT1) au moins à action dérivée et auquel est acheminée la valeur effective de position (1) de l'élément de régulation (33, 35). Au moins le signal (6) à la sortie du premier convertisseur de signal (2) et le signal de régulation (13) déterminé pour l'élément de régulation (39; 33, 35) sont acheminés à un circuit d'évaluation logique (38). Ce circuit produit un signal d'indication de panne (18) au moins lorsque, en dépit de la présence d'un signal de régulation (13), le signal (6) à la sortie du premier convertisseur de signal (2) ne présente pas de valeur.
PCT/DE1997/002222 1996-09-30 1997-09-26 Dispositif de surveillance pour un systeme de regulation de l'acheminement d'un fluide de travail a une turbine, notamment a une turbine a gaz WO1998014843A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29617014.3 1996-09-30
DE29617014U DE29617014U1 (de) 1996-09-30 1996-09-30 Überwachungsvorrichtung für eine Stellvorrichtung in der Zuführung des Antriebsmediums einer Turbine, insbesondere einer Gasturbine

Publications (1)

Publication Number Publication Date
WO1998014843A1 true WO1998014843A1 (fr) 1998-04-09

Family

ID=8029948

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1997/002222 WO1998014843A1 (fr) 1996-09-30 1997-09-26 Dispositif de surveillance pour un systeme de regulation de l'acheminement d'un fluide de travail a une turbine, notamment a une turbine a gaz

Country Status (2)

Country Link
DE (1) DE29617014U1 (fr)
WO (1) WO1998014843A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216110B1 (en) * 1998-02-27 2001-04-10 Microsoft Corporation System and method for publishing calendar information to a publicly accessible location

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090065A (en) * 1972-04-26 1978-05-16 Westinghouse Electric Corp. System and method for operating a steam turbine with protection provisions for a valve positioning contingency
JPS59158301A (ja) * 1983-02-26 1984-09-07 Toshiba Corp 蒸気タ−ビンの制御装置
JPS61286505A (ja) * 1985-06-13 1986-12-17 Toshiba Corp 制御弁異常診断装置
JPH02298607A (ja) * 1989-05-11 1990-12-11 Toshiba Corp 地熱蒸気タービンのバイパス制御装置
US5233512A (en) * 1990-06-21 1993-08-03 General Electric Company Method and apparatus for actuator fault detection

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT370851B (de) * 1980-07-07 1983-05-10 Simmering Graz Pauker Ag Turbinen-regel- und schutzsystem
DE3242355C1 (de) * 1982-11-16 1984-06-07 Aktiengesellschaft Kühnle, Kopp & Kausch, 6710 Frankenthal Abfangvorrichtung zur Drehzahlregelung
DE4005546A1 (de) * 1990-02-22 1991-08-29 Gutehoffnungshuette Man Verfahren zur redundanten drehzahlregelung und vorrichtung zur durchfuehrung dieses verfahrens
US5609465A (en) * 1995-09-25 1997-03-11 Compressor Controls Corporation Method and apparatus for overspeed prevention using open-loop response

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090065A (en) * 1972-04-26 1978-05-16 Westinghouse Electric Corp. System and method for operating a steam turbine with protection provisions for a valve positioning contingency
JPS59158301A (ja) * 1983-02-26 1984-09-07 Toshiba Corp 蒸気タ−ビンの制御装置
JPS61286505A (ja) * 1985-06-13 1986-12-17 Toshiba Corp 制御弁異常診断装置
JPH02298607A (ja) * 1989-05-11 1990-12-11 Toshiba Corp 地熱蒸気タービンのバイパス制御装置
US5233512A (en) * 1990-06-21 1993-08-03 General Electric Company Method and apparatus for actuator fault detection

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 007 (M - 350) 12 January 1985 (1985-01-12) *
PATENT ABSTRACTS OF JAPAN vol. 011, no. 155 (M - 589) 20 May 1987 (1987-05-20) *
PATENT ABSTRACTS OF JAPAN vol. 015, no. 073 (M - 1084) 20 February 1991 (1991-02-20) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6216110B1 (en) * 1998-02-27 2001-04-10 Microsoft Corporation System and method for publishing calendar information to a publicly accessible location

Also Published As

Publication number Publication date
DE29617014U1 (de) 1997-10-30

Similar Documents

Publication Publication Date Title
DE102005024686B4 (de) Stellungsregler
DE102009009875B4 (de) Einrichtung zur Erfassung von Fehlfunktionen elektromagnetischer Bremsen von Robotern
DE102015005198B4 (de) Bremsantriebssteuervorrichtung mit Regelwidrigkeitsdetektion
EP2387523B1 (fr) Procédé pour exploiter un système hydraulique ou pneumatique
DE2643492C2 (de) Blockiergeschützte Fahrzeugbremsanlage
DE19921828A1 (de) Verfahren zum Betreiben eines Stellungsreglers und insbesondere dieses Verfahren anwendender Stellungsregler
EP3019387B1 (fr) Système de direction électrohydraulique
DE2904980C2 (fr)
DE102004042891B3 (de) Sicherheitsschaltung für medienbetriebene Verbraucher und Verfahren zum Betrieb derselben
EP1527347A1 (fr) Procede pour surveiller au moins deux soupapes electromagnetiques d'un moteur a combustion interne faisant partie notamment d'un vehicule automobile
DE10118885C1 (de) Vakuumerzeuger
EP4454968A1 (fr) Procédé de détection d'un dysfonctionnement d'un embrayage automatique numérique d'un véhicule ferroviaire et embrayage automatique numérique
EP3575909B1 (fr) Procédé de surveillance d'une pluralité de systèmes mécaniques
WO2006072377A1 (fr) Dispositif de soupape electrohydraulique redondant
WO2009141131A1 (fr) Dispositif et procédé de commande pour une soupape à fermeture rapide d'une turbine à vapeur
EP1570199A1 (fr) Procede de controle d'une conduite tubulaire et regulateur de position destine a une soupape de regulation
WO1998014843A1 (fr) Dispositif de surveillance pour un systeme de regulation de l'acheminement d'un fluide de travail a une turbine, notamment a une turbine a gaz
CH619509A5 (fr)
DE102014201750A1 (de) Verfahren zur Überwachung eines Versorgungsdruckes in einem pneumatischen oder hydraulischen Drucksystem und Steuerluftsystem
EP0443384A2 (fr) Procédé de régulation rédondante de la vitesse de rotation et dispositif pour la mise en oeuvre de ce procédé
DE1958017A1 (de) Schaltungsanordnung zur gesicherten Steuerung von Schalthandlungen
DE4017045A1 (de) System zur steuerung eines kraftfahrzeugs
WO2021123029A1 (fr) Procédé de test de la fonctionnalité d'une électrovanne pour le déclenchement d'une soupape de sécurité
WO2016198109A1 (fr) Procédé de fonctionnement d'un mécanisme de commande électrique ou fluidique et commande de déplacement d'un mécanisme de commande
DE2451098C3 (de) Einrichtung zur Überwachung von zwei parallel arbeitenden Leistungsaggregaten

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP KR RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 1998516135

Format of ref document f/p: F

122 Ep: pct application non-entry in european phase