US20130287596A1 - Method and system for identifying and controlling a centrifugal pump - Google Patents

Method and system for identifying and controlling a centrifugal pump Download PDF

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Publication number
US20130287596A1
US20130287596A1 US13/871,592 US201313871592A US2013287596A1 US 20130287596 A1 US20130287596 A1 US 20130287596A1 US 201313871592 A US201313871592 A US 201313871592A US 2013287596 A1 US2013287596 A1 US 2013287596A1
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US
United States
Prior art keywords
control
pumping circuit
flow rate
centrifugal pump
electric motor
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.)
Abandoned
Application number
US13/871,592
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English (en)
Inventor
Marc GENEAU
Philippe Le Goualec
François Malrait
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.)
Schneider Toshiba Inverter Europe SAS
Original Assignee
Schneider Toshiba Inverter Europe SAS
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 Schneider Toshiba Inverter Europe SAS filed Critical Schneider Toshiba Inverter Europe SAS
Assigned to SCHNEIDER TOSHIBA INVERTER EUROPE SAS reassignment SCHNEIDER TOSHIBA INVERTER EUROPE SAS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Geneau, Marc, LE GOUALEC, Philippe, MALRAIT, FRANCOIS
Publication of US20130287596A1 publication Critical patent/US20130287596A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines

Definitions

  • the present invention relates to a method and a system for identifying and controlling a centrifugal pump.
  • a pumping circuit in which a centrifugal pump is included is driven by a control system.
  • This control system comprises an electric motor actuating the centrifugal pump and controlled by a variable speed drive.
  • the system also comprises a valve or a cock making it possible to control the flow rate in the pumping circuit.
  • the control of the centrifugal pump is carried out on the basis of pump curves. These pump curves are defined for a single speed called the nominal speed and represent the pressure as a function of the flow rate, the mechanical power as a function of the flow rate. For a speed other than the nominal speed, there are laws of extrapolation called Rateau laws for creating the link between the magnitudes of the pumping circuit (pressure, flow rate) and the mechanical magnitudes (power, speed):
  • the pump curves and the extrapolation laws can already be stored in the system or reconstituted during an identification phase.
  • a pressure sensor and a flow-rate sensor are used to measure the flow rate and the pressure of the fluid flowing in the pumping circuit at each speed of the electric motor corresponding to a mechanical power supplied to the pump.
  • the identification phase carried out at a nominal speed, allows a correlation between the measurement data of the system, whether they be the data associated with the pumping circuit (pressure, flow rate) or the mechanical data (speed, power).
  • the known drawbacks in the use of these data are of several orders:
  • the object of the invention is to propose a control and identification method and system making it possible, during a dedicated phase, to be sure of the synchronized correlation between the mechanical data applied to the electric motor that are available in the variable speed drive and the data of the pumping circuit collected by the external sensors. This correlation will make it possible to estimate with very great accuracy the magnitudes of the pumping circuit (pressure, flow rate) without using sensors in the pumping circuit, independently of the manufacturer data, that is to say of the nominal pump curves.
  • the finality of the estimation of pressure and flow rate magnitudes can be either to diagnose the measurement elements, or to control or monitor the pumping circuit without pressure and flow-rate sensors.
  • the second step, the third step and the fourth step are carried out for several speeds applied to the electric motor.
  • the third step and the fourth step are carried out for each operating point of the solenoid valve.
  • the invention also relates to a system for controlling a centrifugal pump included in a pumping circuit, said control system comprising:
  • control and processing unit is included in the variable speed drive.
  • FIG. 1 represents the pumping circuit and the control system of the invention
  • FIG. 2 represents the sequence applied during the phase of identifying the centrifugal pump
  • FIGS. 3A and 3B represent respectively the pressure/flow rate pump curves and the motor power/flow rate pump curves characterized by the sequence of FIG. 2 . Marked in bold are the pump curves at the nominal speed.
  • a pumping circuit comprises a centrifugal pump 1 controlled by a control system.
  • a control system comprises an electric motor 2 designed to actuate the centrifugal pump and a variable speed drive 3 designed to control said electric motor.
  • variable speed drive Since the architecture of a variable speed drive is well known, it will not be described in the present application.
  • the characterization of the centrifugal pump 1 consists in carrying out an identification phase prior to the normal operation of the pump in the pumping circuit. This identification phase is carried out at least once, for example before the first start-up of the pumping circuit.
  • the identification phase of the centrifugal pump 1 consists in reconstituting the pump curves for the nominal speed but also at other operating speeds in order to cover the complete operating range.
  • pump curves define, for each speed of the electric motor, the pressure (Pf) of the fluid flowing in the pumping circuit as a function of the flow rate (Df) of the fluid flowing in the pumping circuit ( FIG. 3A ) and the motor power (Pmot) as a function of the flow rate (Df) of the fluid flowing in the pumping circuit ( FIG. 3B ).
  • the control system In order to reconstitute the pump curves, the control system must also comprise a pressure sensor 4 designed to measure the pressure (Pf) of the fluid that flows in the pumping circuit and a flow-rate sensor 5 designed to measure the flow rate (Df) of the fluid flowing in the pumping circuit. Once the identification phase is complete, these sensors are no longer of any use and can be removed.
  • the pumping actuator consisting of a variable speed drive and a centrifugal pump identified according to the proposed method can be inserted into another pumping circuit that has no sensors of the pressure and flow-rate magnitudes and thus provide a control with no sensor of the pumping circuit.
  • control system comprises a control and processing unit 30 making it possible to centralize the control and processing.
  • This control and processing unit 30 may for example be a programmable controller or be that which is already present in the variable speed drive 3 . In the rest of the description, it will be considered that the control and processing unit 30 is included in the variable speed drive.
  • the control and processing unit 30 comprises a module for identifying the characteristics of the centrifugal pump 1 , activated by the operator or activated automatically, for example when the system is first switched on.
  • FIG. 1 The control system of the invention is shown in FIG. 1 .
  • the variable speed drive 3 is connected to the electric motor 2 and the electric motor 2 controls the centrifugal pump 1 .
  • a solenoid valve 6 placed on the pumping circuit, is controlled directly by the control and processing unit 30 .
  • the flow-rate sensor 5 and the pressure sensor 4 are connected directly to the control and processing unit 30 in order to send their measurement data to the latter.
  • the control and processing unit 30 activates means for controlling the variable speed drive 3 in order to apply a first speed to the electric motor 2 .
  • the speed is for example chosen from a range stretching from 30% to 120% of the nominal speed.
  • the control and processing unit 30 activates means for controlling the solenoid valve 6 for an operating point.
  • the control and processing unit 30 records the values supplied by the sensor 4 for sensing the pressure (Pf) of the fluid flowing in the pumping circuit and by the sensor 5 for sensing the flow rate (Df) of the fluid flowing in the pumping circuit and determines, by measurement or by estimation, the power (PMot) supplied by the variable speed drive 3 . All these measurement data are sent to the control and processing unit 30 which records them in storage means (step E 4 ). The control and processing unit 30 repeats the same operations for a new speed to be applied to the electric motor 2 , until all of the speeds have been scanned. Based on the collected data, the control and processing unit 30 activates means for determining the pump curves.
  • control and processing unit 30 establishes each pump curve in order to cover several possible cases of use:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
US13/871,592 2012-04-26 2013-04-26 Method and system for identifying and controlling a centrifugal pump Abandoned US20130287596A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1253882 2012-04-26
FR1253882A FR2990007B1 (fr) 2012-04-26 2012-04-26 Procede et systeme d'identification et de commande d'une pompe centrifuge

Publications (1)

Publication Number Publication Date
US20130287596A1 true US20130287596A1 (en) 2013-10-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/871,592 Abandoned US20130287596A1 (en) 2012-04-26 2013-04-26 Method and system for identifying and controlling a centrifugal pump

Country Status (6)

Country Link
US (1) US20130287596A1 (ja)
EP (1) EP2657529A1 (ja)
JP (1) JP2013227975A (ja)
CN (1) CN103375412B (ja)
BR (1) BR102013009522A2 (ja)
FR (1) FR2990007B1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076549A1 (en) * 2014-09-12 2016-03-17 Smith & Loveless Inc. Pump control for operation on a variable pressure force main
US10415562B2 (en) * 2015-12-19 2019-09-17 Schlumberger Technology Corporation Automated operation of wellsite pumping equipment

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573403B1 (en) * 2011-09-20 2017-12-06 Grundfos Holding A/S Pump
EP2932342B1 (en) * 2012-12-12 2021-05-19 S. A. Armstrong Limited Co-ordinated sensorless control system
JP6290119B2 (ja) * 2015-02-25 2018-03-07 株式会社東芝 運転効率推定システム、運転効率推定方法、運転効率推定装置及びコンピュータプログラム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070212210A1 (en) * 2006-03-08 2007-09-13 Itt Manufacturing Enterprises, Inc. Method for determining pump flow without the use of traditional sensors

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
JPS58113596A (ja) * 1981-12-28 1983-07-06 Toshiba Corp ポンプの流量制御装置
US5240380A (en) * 1991-05-21 1993-08-31 Sundstrand Corporation Variable speed control for centrifugal pumps
US6260004B1 (en) * 1997-12-31 2001-07-10 Innovation Management Group, Inc. Method and apparatus for diagnosing a pump system
US6655922B1 (en) * 2001-08-10 2003-12-02 Rockwell Automation Technologies, Inc. System and method for detecting and diagnosing pump cavitation
JP2006307682A (ja) * 2005-04-26 2006-11-09 Ebara Densan Ltd ポンプ装置
EP1748573B1 (de) * 2005-07-29 2010-03-31 Grundfos Management A/S Verfahren zur Datenübertragung zwischen einem Pumpenaggregat und einer Steuereinrichtung sowie ein entsprechend ausgebildetes Pumpensystem
DE102006022740A1 (de) * 2006-05-12 2007-11-15 Ksb Aktiengesellschaft Einrichtung zur Messwertübertragung
US8092190B2 (en) * 2007-04-06 2012-01-10 Baker Hughes Incorporated Systems and methods for reducing pump downtime by determining rotation speed using a variable speed drive
DE102007022348A1 (de) * 2007-05-12 2008-11-13 Ksb Aktiengesellschaft Einrichtung und Verfahren zur Störungsüberwachung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070212210A1 (en) * 2006-03-08 2007-09-13 Itt Manufacturing Enterprises, Inc. Method for determining pump flow without the use of traditional sensors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160076549A1 (en) * 2014-09-12 2016-03-17 Smith & Loveless Inc. Pump control for operation on a variable pressure force main
US9886018B2 (en) * 2014-09-12 2018-02-06 Smith & Loveless Inc. Pump control for operation on a variable pressure force main
US10415562B2 (en) * 2015-12-19 2019-09-17 Schlumberger Technology Corporation Automated operation of wellsite pumping equipment

Also Published As

Publication number Publication date
EP2657529A1 (fr) 2013-10-30
CN103375412B (zh) 2016-08-03
FR2990007B1 (fr) 2014-04-18
FR2990007A1 (fr) 2013-11-01
BR102013009522A2 (pt) 2016-02-16
JP2013227975A (ja) 2013-11-07
CN103375412A (zh) 2013-10-30

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Owner name: SCHNEIDER TOSHIBA INVERTER EUROPE SAS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GENEAU, MARC;LE GOUALEC, PHILIPPE;MALRAIT, FRANCOIS;REEL/FRAME:030303/0647

Effective date: 20130307

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION