EP1564411B1 - Procédé de détection des erreurs de fonctionnement d'une unité de pompage - Google Patents

Procédé de détection des erreurs de fonctionnement d'une unité de pompage Download PDF

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Publication number
EP1564411B1
EP1564411B1 EP04002979A EP04002979A EP1564411B1 EP 1564411 B1 EP1564411 B1 EP 1564411B1 EP 04002979 A EP04002979 A EP 04002979A EP 04002979 A EP04002979 A EP 04002979A EP 1564411 B1 EP1564411 B1 EP 1564411B1
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Prior art keywords
pump
motor
variables
fault
hydraulic
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EP04002979A
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German (de)
English (en)
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EP1564411B2 (fr
EP1564411A1 (fr
Inventor
Carsten Kallesoe
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Grundfos AS
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Grundfos AS
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Priority to EP04002979.5A priority Critical patent/EP1564411B2/fr
Priority to AT04002979T priority patent/ATE389807T1/de
Priority to DE502004006565T priority patent/DE502004006565D1/de
Priority to CN200580008075.3A priority patent/CN1938520B/zh
Priority to US10/597,892 priority patent/US8070457B2/en
Priority to PCT/EP2005/001193 priority patent/WO2005078287A1/fr
Publication of EP1564411A1 publication Critical patent/EP1564411A1/fr
Publication of EP1564411B1 publication Critical patent/EP1564411B1/fr
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Priority to US13/284,049 priority patent/US8353676B2/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0245Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F04D15/0236Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption

Definitions

  • the invention relates to a method for determining errors in the operation of a pump unit, in particular a centrifugal pump unit according to the features specified in the preamble of claim 1.
  • EP-A-1 286 056 It belongs to the state of the art to detect in a pump unit cavitation in the pump by means of sensors which record the pump pressure and the flow rate. The data recorded by the sensors are fed to a classification system which determines through a neural network whether and to what extent cavitation exists.
  • EP-A-0 321 295 It belongs to the state of the art to detect by means of a variety of sensors hydraulic system data and mechanical data of the pump motor to detect critical operating conditions of the pump and turn off the pump if necessary in time when the pump z. B. runs dry or promotes closed valves.
  • pump units are therefore considered to be the state of the art for providing a large number of sensors, on the one hand in order to detect operating conditions, and on the other hand also to determine fault conditions of the system and / or the pump unit.
  • the disadvantage here is that the sensors required in this context not only consuming and expensive, but is often prone to failure. Gats to create, which is executable with the least possible sensor technology and a device for carrying out the method.
  • the basic idea of the present invention is to detect characteristic data which are generally available anyway or at least with little effort to determine the motor's electrical variables and at least one variable hydraulic variable of the pump for the electric motor and the hydraulic-mechanical pump and to evaluate them by mathematical linkage. In the simplest form, this is done by comparison with predetermined values, wherein both the comparison and the result is done automatically by means of electronic data processing, which thus determines whether an error in the operation of the pump is present or not.
  • the method according to the invention requires a minimum of sensor technology and, in the case of modern pumps, which are typically frequency-controlled, which in any case have digital data processing, can generally be implemented by software. It is particularly advantageous that the electrical power of the motor determining variables, namely typically the voltage applied to the motor and the motor current, anyway within the frequency converter electronics are available, so that for detecting a hydraulic variable, eg the pressure only one Pressure sensor is required, which incidentally in modern pumps also often Standard features.
  • the predetermined values required for comparison can be stored in digital form in corresponding memory components of the engine electronics.
  • the two electrical quantities of the motor determining the electrical power of the motor are mathematically linked to obtain at least one comparison value and, on the other hand, the at least one variable hydraulic variable the pump and a further determining the performance of the pump mechanical or hydraulic variable to obtain at least one further comparison value are mathematically linked, in which case it is determined by comparison with predetermined values based on the result of the mathematical link, whether an error exists or not.
  • the mathematical combination is carried out for the motor-side data by appropriate for the electrical and / or magnetic relationships in the engine determining equations whereas equations are used for the pump, which describe the hydraulic and / or mechanical system.
  • the values resulting from the respective links are compared either directly or with predetermined values stored in the memory electronics, after which the electronic data processing automatically determines whether an error exists or not.
  • the error magnitude is calculated as a deviation between a quantity derived from the engine model, e.g. B. T e or ⁇ and a corresponding from the mechanical-hydraulic model resulting size determined.
  • the method according to the invention has the advantage that it requires little storage space for the given values.
  • the pressure or differential pressure generated by the pump is advantageously used, since this size can be detected on the aggregate side and the provision of such a pressure sensor in numerous pump designs today is state of the art.
  • the amount delivered by the pump can advantageously also be used as a hydraulic variable.
  • the detection of the flow rate can also be done on the aggregate side, also for this are less complex and long-term stable measuring systems at your disposal.
  • an electrical motor model and for the mathematical combination of the mechanical-hydraulic pump size a mechanical-hydraulic pump / motor model is used for the mathematical link for determining the electrical power of the motor.
  • the electric motor model it is preferable to use one defined by the equations (1) to (5) or (6) to (9) or (10) to (14).
  • Equations (1) to (5) represent an electric dynamic motor model for an asynchronous motor.
  • Equations (6) to (9) also represent an electric static motor model for an asynchronous motor.
  • L s ⁇ di sd dt - R s ⁇ i sd + z p ⁇ ⁇ ⁇ L s ⁇ ⁇ rq + v sd
  • Equations (10) to (14) represent an electric dynamic motor model for a permanent magnet motor.
  • Equation (15) and at least one of Equations (16) and (17) are advantageously used.
  • Equation (15) represents the mechanical relationships between motor and pump, whereas equations (1b) and (17) describe the mechanical-hydraulic relationships in the pump.
  • Equation (15) represents the mechanical relationships between motor and pump, whereas equations (1b) and (17) describe the mechanical-hydraulic relationships in the pump.
  • Claim 8 defines, by way of example, how mathematical links are made to determine whether an error exists or not. On the storage of predetermined values can be completely omitted here in principle.
  • the basic idea of this, concrete method is, on the one hand with the aid of the engine model, to determine the engine torque resulting from the electrical variables on the motor shaft and the rotational speed, the latter also being able to be measured. With the aid of equations (16) and / or (17) a relationship between pressure and flow rate on the one hand and between power / torque and flow rate on the other hand is determined.
  • a tolerance band by variance of at least one of the variables a h0 to a h2 , a t0 to a t2 , B and J in order to register an error only if it is is also operationally relevant.
  • two hydraulic variables can preferably be determined by measuring and the determined values are compared with predetermined values to determine the type of error, wherein in each case the predetermined values define an area in three-dimensional space and it is determined whether or not the quantities determined lie on these areas (r * 1 to r * 4 ) and, based on the combination of the values, the type of error on the basis of given values Limit value combinations are determined.
  • the type of error can then be determined, for example, from the following table: Error type defect size r 1 , r 1 * r 2 , r 2 * r 3 , r 3 * r 4 r 4 * comparison area Increased friction due to mechanical defects 1 0 1 1
  • the surfaces formed in the three-dimensional space on the basis of predetermined values are typically space-curved surfaces whose values have previously been determined by the factory based on the respective unit or aggregate type and stored in the digital data memory on the aggregate side.
  • the aforementioned comparison surfaces r * 1 to r * 4 are arranged in a three-dimensional space which at r * 1 from the torque, the flow and the rotor speed, at r * 2 from the head, the flow rate and the rotor speed, for r * 3 from the torque, the head and the rotor speed as well are formed for r * 4 from the torque, the delivery head and the flow rate.
  • the variables defined in the table by the comparison surfaces r * 1 to r * 4 indicate the respective operating state, wherein the number 0 means that the respective value lies within the area defined by the predetermined values and 1 outside.
  • the error combination defined in the table due to increased friction due to mechanical defects can mean bearing damage or an otherwise caused increased frictional resistance between the rotating parts and the stationary parts of the aggregate.
  • the error combination marked under the generic term reduced promotion / missing pressure can be caused, for example, by errors or wear on the pump impeller or an obstacle in the pump inlet or outlet.
  • defect in the intake / missing flow error combination can be caused for example by defect of the ring seal at the suction of the pump.
  • the operating states designated in the table by the variables R 1 to R 4 are based on mathematical calculations of fault parameters r 1 to r 4 according to the equations (19) to (22), wherein the corresponding error amount becomes zero when a correct operation is present and the value 1 in case of error.
  • the table is to be understood in terms of the type of error in a similar manner as described above. Figuratively speaking, each represents the mistake sizes r 1 to r 4 are spaced from the corresponding areas r * 1 to r * 4 . However, the error quantities do not necessarily correspond to the areas r * 1 to r * 4 .
  • the error quantities r 1 to r 4 correspond to the equations (19) to (22) and correspond to the areas r * 1 to r * 4 in the FIGS. 7 to 10 ,
  • the pump unit when a fault is detected, the pump unit is actuated with a different speed, in order then to be able to narrow down the detected error more precisely on the basis of the resulting measuring results.
  • the mechanical-hydraulic pump / motor model comprises not only the pump unit itself, but also beyond at least parts of the acted upon by the pump hydraulic system, so that errors of this hydraulic system can be determined.
  • a centrifugal pump assembly In order to carry out the method according to the invention for determining the fault in operating states of a centrifugal pump assembly there are means for detecting two electrical variables determining the motor power and means for detecting at least one variable hydraulic size of the pump and means for detecting at least one further mechanical or mechanical performance determining the power of the pump provide hydraulic size and an electronic evaluation device which determines a fault condition of the pump unit based on the detected variables.
  • a sensor system for detecting the voltage applied to the motor supply voltage and the supply current and for detecting the pressure applied by the pump, preferably differential pressure and the delivery rate or the rotational speed is provided here.
  • an evaluation device is to be provided, which may be in the form of digital data processing, for example a microprocessor, in which the method according to the invention is implemented by software.
  • an electronic memory is also to be provided.
  • All components, with the exception of the sensors required for the detection of hydraulic variables, are preferably an integral part of the motor and / or pump electronics, so that constructively so far no further provisions for carrying out the method according to the invention are to be made.
  • Another embodiment may be a separate module provided in a panel or control panel, in the same way as a motor protection switch, but with the monitoring and diagnostic features as described above.
  • centrifugal pumps as can be seen from the mechanical-hydraulic pump model.
  • Such pumps may be, for example, industrial pumps, submersible pumps for sewage or water supply and heating circulation pumps.
  • Particularly advantageous is a diagnostic system according to the invention in canned pumps, since through early fault detection, the looping through of the can and thus outlet of the pumped liquid, eg. B. in the living area, preventively prevented.
  • the mechanical-hydraulic pump model In the application of the invention in Verdrängerpumpen Scheme the mechanical-hydraulic pump model must be adjusted according to the different physical relationships. The same applies to the use of other engine types for the electric motor model.
  • means are provided for generating and transmitting at least one error message to a display unit arranged on the pump unit or elsewhere, be it in the form of one or more indicator lights or a display with an alphanumeric display.
  • the transmission can be wireless, for example via infrared or radio but also wired, preferably in digital form.
  • FIG. 1 A simplified procedure is based on Fig. 1 shown.
  • the variable electrical power-determining variables flow, in particular the voltage V abc and the current i abc .
  • the product of these quantities defines the electrical power consumed by the motor.
  • the torque T e on the shaft of the motor and the rotational speed ⁇ derivable from the engine as they result arithmetically on the basis of the engine model.
  • This power-dependent electrical Sizes of the motor are linked to the determined mechanical delivery height H (pressure) in a pump model 2, for example according to equations (16) and (17), in which case the result is compared with predetermined operating values determined on the basis of defined operating points. If these input variables agree with the specified values, the pump set operates without errors. On the other hand, if the difference is greater than a predetermined amount, then an error signal r is generated which signals a malfunction of the pump.
  • Fig. 3 The system is structured as in Fig. 3 is shown in detail. Again, an electric motor model is provided, the input variables V abc and i abc and the example, a static motor model according to the equations (6) to (9) is based, as it is well known and based on Fig. 5 is shown.
  • the output variable of this static engine model is the engine torque T e , which in turn flows via the equation (15) input into the mechanical part of the pump model 3 a.
  • the hydraulic part of the pump model 3b is defined by equations (16) and (17), via which the hydraulic part of the plant 4 is coupled.
  • the hydraulic part of the plant is defined by equation (18) and based on Fig. 4 schematically shown, in which P in the pressure inlet of the pump, H p the differential pressure of the pump, Q the flow rate, P out the pressure at the consumer end of the system and V 1 the flow losses within the. Represent pump.
  • Z out is the static pressure level at the consumer end of the system and Z at the pump inlet.
  • Fig. 3 clarifies the relationship between the engine model, the mechanical part of the pump model, the hydraulic part of the pump model and the hydraulic part of the plant. While in the hydraulic parts of the pump model 3b and the hydraulic part of the plant Inlet and out flow, and go in the hydraulic part of the pump model 3b, the speed ⁇ r , which also enters the engine model 1. The torque determined from the hydraulic part of the pump model 3b in turn enters the mechanical part of the pump model 3a for determining the rotational speed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Electric Motors In General (AREA)
  • Fluid-Pressure Circuits (AREA)

Claims (16)

  1. Procédé pour la détermination d'erreurs dans le fonctionnement d'un groupe moto-pompe, selon lequel au moins deux grandeurs électriques du moteur, fixant la puissance électrique du moteur, et au moins une grandeur hydraulique variable de la pompe ainsi qu'au moins une grandeur supplémentaire, mécanique ou hydraulique, fixant la puissance de la pompe, sont détectées et, d'une part, les deux grandeurs électriques du moteur, fixant la puissance électrique du moteur, sont combinées mathématiquement, en vue de l'obtention d'au moins une valeur de comparaison, et, d'autre part, la au moins une grandeur hydraulique variable de la pompe ainsi que la au moins une grandeur supplémentaire, mécanique ou hydraulique, fixant la puissance de la pompe, sont combinées mathématiquement en vue de l'obtention d'au moins une valeur de comparaison, étant précisé que pour la combinaison mathématique, on emploie un modèle mathématique de moteur électrique (1) en liaison avec un modèle mathématique de pompe/moteur mécanique-hydraulique (3) et qu'à partir des résultats des combinaisons mathématiques, il est déterminé, par comparaison avec des valeurs pré-établies, si une erreur est présente ou non.
  2. Procédé selon la revendication 1, caractérisé en ce que la tension appliquée au moteur et le courant alimentant le moteur, sont détectés comme étant les grandeurs électriques fixant la puissance électrique du moteur.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que, lorsque la présence d'une erreur est déterminée, il est encore déterminé de quelle erreur il s'agit.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que la grandeur hydraulique détectée est la pression développée par la pompe.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la grandeur hydraulique détectée est le débit de refoulement de la pompe.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la grandeur hydraulique détectée est la pression différentielle entre l'aspiration et le refoulement de la pompe.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le modèle de moteur électrique (1) est formé par les équations suivantes s = di sd dt = - s i sd + L m L r r ψ rd + z p ω ψ rd + v sd
    Figure imgb0070
    s = di sq dt = - s i sq + L m L r r ψ rq - z p ω ψ rd + v sq
    Figure imgb0071
    d ψ rd dt = - r ψ rd - z p ω ψ rq + r L m i sd
    Figure imgb0072
    d ψ rq dt = - r ψ rq + z p ω ψ rd + r L m i sq
    Figure imgb0073
    T e = z p 3 2 L m L r ψ rd i sq - ψ rq i sd
    Figure imgb0074

    ou V s = Z s s I s
    Figure imgb0075
    ω = ω s - s ω s
    Figure imgb0076
    I r = V s Z r s
    Figure imgb0077
    T e = 3 R r I r 2 s
    Figure imgb0078

    ou L s di sd dt = - R s i sd + z p ω L s ψ rq + v sd
    Figure imgb0079
    L s di sq dt = - R s i sq - z p ω L s ψ rd + v sq
    Figure imgb0080
    d ψ rd dt = - z p ω ψ rq
    Figure imgb0081
    d ψ rq dt = - z p ω ψ rd
    Figure imgb0082
    T e = z p 3 2 ψ rd i sq - ψ rq i sd
    Figure imgb0083

    dans lesquelles
    isd est le courant du moteur dans la direction d
    isq est le courant du moteur dans la direction q
    ψrd est le flux magnétique du rotor dans la direction d
    ψrq est le flux magnétique du rotor dans la direction q
    Te est le couple du moteur
    νsd est la tension d'alimentation du moteur dans la direction d
    νsq est la tension d'alimentation du moteur dans la direction q
    ω est la vitesse angulaire du rotor et de la roue à aubes
    R's est la résistance équivalente de l'enroulement du stator
    R'r est la résistance équivalente de l'enroulement du rotor
    Lm est la résistance de couplage inductive entre l'enroulement du stator et l'enroulement du rotor
    L's est la résistance équivalente inductive de l'enroulement du stator
    Lr est la résistance inductive de l'enroulement du rotor
    zp est le nombre de paires de pôles
    Is est le courant de phase
    Vs est la tension de phase
    ωs est la fréquence de la tension d'alimentation
    ω est la vitesse de rotation réelle du rotor et de la roue à aubes
    s est le glissement du moteur
    Zs(s) est l'impédance du stator
    Zr(s) est l'impédance du rotor
    Rr est la résistance équivalente de l'enroulement du rotor
    Rs est la résistance équivalente de l'enroulement du stator
    Ls est la résistance inductive de l'enroulement du stator,
    d et q étant deux direction perpendiculaires l'une à l'autre perpendiculairement à l'arbre du moteur,
    et en ce que le modèle de pompe/moteur mécanique-hydraulique est formé par une équation J dt = T e - - T P
    Figure imgb0084
    et au moins l'une des équations H p = - a h 2 Q 2 + a h 1 + a h 0 ω 2
    Figure imgb0085
    T p = - a t 2 Q 2 + a t 1 + a t 0 ω 2
    Figure imgb0086
    dans lesquelles
    dt
    Figure imgb0087
    st la dérivée dans le temps de la vitesse angulaire du rotor
    Tp est le couple de rotation de la pompe
    J est le moment d'inertie du rotor, de la roue à aubes et du liquide transporté pris dans la roue à aubes
    B est la constante de frottement
    Q est le débit de refoulement de la pompe
    Hp est la pression différentielle engendrée par la pompe
    ah2, ah1, ah0 sont les paramètres qui dépeignent la relation entre la vitesse de rotation de la roue à aubes, le débit de refoulement et la pression différentielle et
    at2, at1, at0 sont les paramètres qui dépeignent la relation entre la vitesse de rotation de la roue à aubes, le débit de refoulement et le moment d'inertie.
  8. Procédé selon la revendication 7, caractérisé en ce que dans les équations (16) et (17), les grandeurs ah0-ah2 et at0-at2 sont établies, ainsi que dans l'équation (15), les grandeurs B et J, en ce qu'à partir du modèle du moteur électrique (1) conforme aux équations (1) - (5) ou (6) - (9) ou (10) - (14), un couple de moteur (Te) est déterminé et la vitesse de rotation est soit calculée, d'après les équations (1) - (5) ou (6) - (9) ou (10) - (14), soit mesurée, après quoi, à l'aide des équations (16) et/ou (17), une relation entre la pression et le débit de refoulement, d'une part, et/ou entre la puissance/le couple et le débit de refoulement, d'autre part, est déterminée, après quoi, de préférence à l'aide de l'équation (15), il est vérifié si les grandeurs calculées à l'aide du modèle de moteur (1) coïncident ou non avec les grandeurs calculées à l'aide du modèle de pompe (3) après application des grandeurs hydrauliques mesurées, une erreur étant enregistrée en cas d'absence de coïncidence.
  9. Procédé selon la revendication 7, caractérisé en ce qu'une bande de tolérance est établie par variance d'au moins l'une des grandeurs ah0-ah2 et at0-at2 et B et J.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour la détermination de la nature de l'erreur, en plus des deux grandeurs électriques deux grandeurs hydrauliques sont déterminées, de préférence par mesure, et les valeurs déterminées sont portées dans les équations selon la revendication 8, de telle manière que plusieurs grandeurs d'erreur (r1 - r4) en résultent, étant précisé qu'à partir de la combinaison des grandeurs d'erreur, la nature de l'erreur est déterminée sur la base de combinaisons de valeurs limites pré-établies.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour la détermination de la nature de l'erreur, en plus des deux grandeurs électriques deux grandeurs hydrauliques sont déterminées, de préférence par mesure, et les valeurs déterminées ou des valeurs dérivées de celles-ci sont comparées à des valeurs pré-établies, les valeurs pré-établies définissant chacune une surface, étant précisé qu'il est déterminé si les grandeurs déterminées ou les grandeurs dérivées de celles-ci sont situées ou non sur l'une de ces surfaces (r*1 - r*4), et que sur la base de la combinaison des grandeurs d'erreur, la nature de l'erreur est déterminée à partir de combinaisons pré-établies de valeurs limites.
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce que la détermination de la nature de l'erreur s'effectue à partir du tableau suivant Nature de l'erreur Grandeur d'erreur r1, r1* r2, r2* r3, r3* r4, r4* Surface de comparaison Frottement accru à cause de défauts mécaniques 1 0 1 1 Transport réduit/Pression insuffisante 0 1 1 1 Défaut dans la zone d'aspiration/débit de refoulement insuffisant 1 1 0 1 Arrêt du transport 1 1 1 1
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que lors de la détermination d'une erreur, le groupe moto-pompe est excité dans le sens d'une vitesse de rotation modifiée, pour à partir des résultats de mesure ou se présentant alors, spécifier avec plus de précision l'erreur déterminée.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que le modèle de pompe/moteur mécanique-hydraulique (3) englobe au moins des éléments du système hydraulique (4) alimenté par la pompe, de telle manière que des erreurs du système hydraulique (4) puissent également être déterminées.
  15. Procédé selon la revendication 14, caractérisé en ce que le système hydraulique (4) est défini par l'équation K J dQ dt = H p - p out + ρgz out - p in - ρgz in K v + K l Q 2
    Figure imgb0088
    dans laquelle
    KJ est la constante qui dépeint l'inertie de la colonne de liquide dans la tuyauterie
    KV la constante qui dépeint la perte de pression, fonction du débit, dans la vanne, et
    KL est la constante qui dépeint la perte de pression, fonction du débit, dans la tuyauterie
    Hp la pression différentielle de la pompe
    Pout la pression à l'extrémité, côté consommateur, de l'installation
    Pin la pression d'alimentation
    Zout le niveau de pression statique à l'extrémité, côté consommateur, de l'installation
    Zin le niveau de pression statique à l'entrée de la pompe
    p la densité du fluide transporté
    g la constante gravitationnelle.
  16. Procédé selon l'une des revendications précédentes, caractérisé en ce que les grandeurs r1 - r4 sont définies par les équations { J d ω ^ 1 dt = - B ω ^ 1 - - a t 2 Q 2 + a t 1 + a t 0 ω 2 + T e + k e ω - ω ^ 1 r 1 = q 1 ( ω - ω ^ 1 )
    Figure imgb0089
    { r 2 = q 2 ( - a h 2 Q 2 + a h 1 + a h 0 ω 2 - H p )
    Figure imgb0090
    { = a h 1 ω + a h 1 2 ω 2 - 4 a h 2 H p + a h 0 ω 2 2 a h 2 J d ω ^ 3 dt = - B ω ^ 3 - - a t 2 2 + a t 1 Qʹω + a t 0 ω 2 + T e + k 3 ω - ω ^ 3 r 3 = q 3 ( ω - ω ^ 3 )
    Figure imgb0091
    { ωʹ = - a h 1 H p + a h 1 2 H p 2 - 4 a h 2 H p + a h 0 Q 2 2 a h 2 J d ω ^ 4 dt = - B ω ^ 4 - - a t 2 Q 2 + a t 1 Qωʹ + a t 0 ωʹ 2 + T 6 + k 4 ωʹ - ω ^ 4 r 4 = q 4 ( ωʹ - ω ^ 4 )
    Figure imgb0092
    dans lesquelles
    k1, k3, k4 sont des constantes
    q1, q2, q3, q4 sont des constantes
    Q' est le débit de refoulement calculé, sur la base de la vitesse de rotation instantanée et de la pression mesurée,
    TM1 est la vitesse de rotation calculée du rotor sur la base des équations mécanqiues-hydrauliques (15) et (17)
    TM3 est la vitesse de rotation calculée du rotor sur la base des équations (15), (16) et (17)
    TM4 est la vitesse de rotation calculée du rotor sur la base des équations (15), (16) et (17)
    ω' est la vitesse de rotation calculée du rotor sur la base de la pression de refoulement mesurée et du débit de refoulement mesuré
    r1 - r4 sont des grandeurs d'erreur et
    r1 * - r4 * sont des surfaces fixées par trois variables, qui représentent un fonctionnement exempt d'erreurs de la pompe.
EP04002979.5A 2004-02-11 2004-02-11 Procédé de détection des erreurs de fonctionnement d'une unité de pompage Expired - Lifetime EP1564411B2 (fr)

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Application Number Priority Date Filing Date Title
EP04002979.5A EP1564411B2 (fr) 2004-02-11 2004-02-11 Procédé de détection des erreurs de fonctionnement d'une unité de pompage
AT04002979T ATE389807T1 (de) 2004-02-11 2004-02-11 Verfahren zur ermittlung von fehlern beim betrieb eines pumpenaggregates
DE502004006565T DE502004006565D1 (de) 2004-02-11 2004-02-11 Verfahren zur Ermittlung von Fehlern beim Betrieb eines Pumpenaggregates
US10/597,892 US8070457B2 (en) 2004-02-11 2005-02-05 Method for determining faults during the operation of a pump unit
CN200580008075.3A CN1938520B (zh) 2004-02-11 2005-02-05 用于确定泵单元运行时的故障的方法
PCT/EP2005/001193 WO2005078287A1 (fr) 2004-02-11 2005-02-05 Procede de determination d'anomalies lors du fonctionnement d'un groupe de pompage
US13/284,049 US8353676B2 (en) 2004-02-11 2011-10-28 Method for determining faults during the operation of a pump unit

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EP04002979.5A EP1564411B2 (fr) 2004-02-11 2004-02-11 Procédé de détection des erreurs de fonctionnement d'une unité de pompage

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EP1564411B2 (fr) 2015-08-05
US8070457B2 (en) 2011-12-06
CN1938520B (zh) 2011-07-20
US20120101788A1 (en) 2012-04-26
ATE389807T1 (de) 2008-04-15
US20080240931A1 (en) 2008-10-02
WO2005078287A1 (fr) 2005-08-25
CN1938520A (zh) 2007-03-28
DE502004006565D1 (de) 2008-04-30
US8353676B2 (en) 2013-01-15
EP1564411A1 (fr) 2005-08-17

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