EP3156651B1 - Dispositif d'augmentation de pression - Google Patents

Dispositif d'augmentation de pression Download PDF

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Publication number
EP3156651B1
EP3156651B1 EP15190110.5A EP15190110A EP3156651B1 EP 3156651 B1 EP3156651 B1 EP 3156651B1 EP 15190110 A EP15190110 A EP 15190110A EP 3156651 B1 EP3156651 B1 EP 3156651B1
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EP
European Patent Office
Prior art keywords
pressure
control device
booster pump
designed
manner
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.)
Active
Application number
EP15190110.5A
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German (de)
English (en)
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EP3156651A1 (fr
Inventor
Torben Thorsager Dissing
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Grundfos Management AS
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Grundfos Management AS
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Priority to EP15190110.5A priority Critical patent/EP3156651B1/fr
Priority to RU2016140465A priority patent/RU2658719C2/ru
Priority to US15/293,708 priority patent/US11326591B2/en
Priority to CN201610902881.5A priority patent/CN106869249B/zh
Publication of EP3156651A1 publication Critical patent/EP3156651A1/fr
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Publication of EP3156651B1 publication Critical patent/EP3156651B1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/09—Component parts or accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • F04D15/0027—Varying behaviour or the very pump
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00—Use of pumping plants or installations; Layouts thereof
    • E03B5/02—Use of pumping plants or installations; Layouts thereof arranged in buildings
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems
    • E03B7/04—Domestic or like local pipe systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/04—Pressure in the outlet chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/06—Pressure in a (hydraulic) circuit

Definitions

  • the invention relates to a pressure-increasing device for increasing the pressure of a liquid flowing through a line.
  • Such pressure boosting devices are used, for example, in the drinking water supply of buildings, when the line-side pressure in a drinking water supply is not high enough, for example, to convey the drinking water to the top floors of a building.
  • Such pressure increasing devices have one or more pressure increasing pumps which can be connected in parallel or in series and which are switched on when the pressure on the output side of the pressure increasing pumps falls below a predetermined limit value. Accordingly, the booster pumps are switched off again when a desired target pressure is reached. In addition to such a start-stop operation, it is possible, in particular with larger flow rates, to operate the booster pumps constantly and to regulate their speed in order to adapt the pressure in the desired manner.
  • EP 2 778 296 A1 describes a pump system for a water supply network with a central pump which is arranged on the input side of a branched water supply network.
  • the pressure-increasing device is regulated on the basis of a model of the supply network so that there is always a sufficiently high pressure at all points in the water supply network. This involves adjusting the output pressure of the pressure-increasing device.
  • the object of the invention is to improve a pressure increasing device for increasing the pressure of a liquid flowing through a line in such a way that an automatic adaptation to the respective hydraulic system takes place in order to minimize the pressure fluctuations occurring.
  • This object is achieved by a pressure increasing device with the features specified in claim 1.
  • the pressure increasing device is used to increase the pressure of a liquid flowing through a line, for example drinking water in a drinking water line.
  • the pressure increasing device has at least one pressure increasing pump.
  • several booster pumps can also be connected in parallel and / or in series. If the term booster pump is used in the following, this also expressly includes such arrangements of several booster pumps.
  • the pressure-increasing device also has a control device which controls the booster pump. For this purpose, there is at least one pressure sensor arranged on the output side of the pressure booster pump on or in the line, which is connected to the control device in such a way that measured pressure values recorded by the pressure sensor are transmitted to the control device.
  • the control device is designed such that it controls the booster pump in a start-stop mode at least in one operating range. That is, the pump is when it reaches an upper Pressure limit switched off and switched on when a lower pressure limit is reached. In this way, the pressure in the line on the outlet side of the pressure increasing device is kept between the upper and lower pressure limit values.
  • the control device is designed such that it automatically adjusts at least one pressure control parameter of the control device in this start-stop mode.
  • a pressure control parameter is a parameter on which the control of the pressure booster pump by the control device is based, in particular a parameter which influences the switch-on and switch-off times in start-stop operation.
  • the automatic adjustment of this at least one pressure control parameter takes place according to the invention on the basis of the time advance of at least one pressure value detected by the pressure sensor. In this way, a self-learning system is created that automatically adapts to the current conditions in the hydraulic system on the output side of the pressure increasing device.
  • the control device is preferably designed such that the adaptation takes place in such a way that the pressure difference between the upper and lower pressure limit values is minimized without increasing the number of switch-on processes above a predetermined limit value. This ensures that the running time of the pressure booster pump in the start-stop mode is essentially not extended, while at the same time comfort is improved by minimizing pressure fluctuations in the system. In this way, comfort can be increased with simultaneous energy efficiency.
  • the pressure increasing device or its control device is designed in such a way that the at least one pressure control parameter which is automatically adapted is the upper and / or the lower pressure limit value.
  • the pressure control parameter can be the difference between the upper and the lower pressure limit, ie a hysteresis range.
  • the adaptation of the pressure limit values or their difference enables an automatic adaptation of the pressure booster to the subsequent hydraulic system or the conditions prevailing in the system by adapting the pressure limit values so that the pressure difference is minimized during operation without the number of switch-on processes or . to significantly increase the total duty cycle of the booster pump. In this way a gain in comfort is achieved.
  • the control device is designed in such a way that the adaptation of the at least one pressure control parameter, for example the upper and / or lower pressure limit value, takes place on the basis of the lead time of the at least one detected pressure value in such evaluation periods, in which is given a constant flow in the line.
  • This has the advantage that pressure fluctuations, which result, for example, from the opening and closing of tapping points or consumers in the hydraulic system, have essentially no influence on the measurement and adaptation of the pressure control parameter. This ensures that essentially only influences that originate from the system itself are taken into account. If, for example, one or more taps in a drinking water pipe are opened, there is a sudden drop in pressure in the system with a sudden increase in flow. These changes in status do not come from the design of the system but from user behavior and should, if possible, be disregarded during the adjustment. This means that the evaluation should preferably take place in a stable operating state.
  • control device is designed in such a way that it places the evaluation periods in those periods in which the pressure booster pump is switched on in the start-stop operation. That is to say, the pressure curve over time, on the basis of which the adjustment of the pressure control parameter takes place, is preferably recorded during the pressure increase by the pressure increase pump.
  • control device is designed in such a way that the said evaluation periods are placed in time periods in which a speed of the pressure booster pump is increased or decreased by the control device.
  • the control device is preferably designed in such a way that it monitors the pressure profile, that is, the profile of the pressure measured by the at least one pressure sensor in the system, in the evaluation periods and only adjusts the at least one pressure control parameter as long as the pressure profile is in predefined Limits a target pressure curve follows. If this is the case, it can be concluded from this that there are no changes in the stable operating state, which result, for example, from the fact that draw-off points are opened or closed. According to the invention, these influences should be excluded as far as possible.
  • control device is designed such that it is used to adapt the at least a pressure control parameter uses a prediction error system identification method. As described above, the deviation from a predicted pressure value is considered and an adaptation is carried out in such a way that this deviation or this error is minimized.
  • the control device preferably has a prediction system for predicting a pressure value on the basis of a prediction model.
  • the prediction system is designed such that the prediction is made as a function of the speed of the pressure booster pump. That is, the prediction system predicts an expected pressure value in the system as a function of a current speed of the pressure booster pump.
  • the prediction system adapts at least one system parameter in the prediction model on the basis of a predetermined algorithm. What is achieved thereby is that the prediction model is adapted to the actual system and the prediction error is minimized or becomes smaller.
  • this system can also be used to detect changes in the hydraulic system, for example leaks. If larger changes in the at least one system parameter in the prediction model are required after a previously constant operation, this indicates a change in the system, for example a leak.
  • the control device can be designed in such a way that, if it detects such a deviation, it indicates, for example, an error.
  • the prediction system is preferably designed such that it uses a prediction model that is an autoregressive model (ARX model), in particular an autoregressive model (ARX model) of the first order.
  • a prediction of the pressure values can be achieved in a simple manner on the basis of such a model.
  • at least one system parameter used can be adapted in the manner described above in order to minimize the prediction error.
  • control device is designed such that the at least one pressure control parameter is stored in the prediction model as a function of the at least one system parameter, in particular on the basis of a predetermined algorithm or a table, in particular a predetermined one and stored in the control device Table, is fixed.
  • the pressure limit values described above can also be adapted as pressure control parameters as a function of the system parameter in the prediction model, which is adapted in the manner described above.
  • the pressure control parameter which in start-stop operation preferably influences the switch-on and / or switch-off times of the pressure booster pump, is adapted as a function of the at least one adapted system parameter, so that in addition to minimizing the prediction error in the In the manner described above, the pressure difference between switching the pressure booster pump on and off can be minimized and thus a gain in comfort can be achieved.
  • the control device preferably has a pressure regulator which regulates the pressure increasing pump to a pressure setpoint.
  • the pressure setpoint is fed to the pressure regulator as an input variable.
  • the pressure setpoint is preferably provided by the control device set on the basis of a desired pressure value specified by a user.
  • the at least one pressure control parameter can be a control or regulating parameter in the pressure regulator.
  • a pressure control parameter can be adapted alone or in addition to other pressure control parameters in the manner described above on the basis of the time profile of the pressure value.
  • the pressure increasing device is designed such that a check valve is arranged on the outlet side of the pressure increasing pump.
  • a check valve is advantageous in order to ensure, when the pressure increasing pump is switched off, that the liquid does not flow back and that the pressure is maintained on the outlet side of the pressure increasing pump, that is to say on the outlet side of the check valve.
  • This check valve also closes at low flow rates. In such a state, a change in the speed of the pressure booster pump no longer has any influence on the actual pressure, which is measured by the pressure sensor downstream of the check valve.
  • the pressure sensor is preferably arranged downstream of the check valve.
  • the control device can switch the controller to the start-stop mode described. The described adaptation of the at least one pressure control parameter then takes place in this state.
  • the control device is preferably designed so that it controls the booster pump in an operating range in which there is a low flow rate, in the described start-stop operation, and to reach the booster pump in at least one other operating range, preferably an operating range with a higher flow rate a desired pressure increase regulates their speed.
  • the limit for the start-stop operation can be set in a known manner, for example in the from DE 38 24 293 A1 known manner. In particular, as described above, this can be recognized by the action of the check valve and by whether the actual pressure profile follows the predicted pressure profile within the desired limits.
  • the pressure booster pump is preferably in continuous operation and the pressure is set in the desired manner by speed control or speed adjustment.
  • the pressure increasing pump is preferably an electronically controlled pump, in particular a pump controlled via a frequency converter, so that the speed can be changed as required.
  • the control device is preferably designed such that it detects the area of low flow.
  • the control device can preferably have a flow detection model which is designed to detect the low flow operating range on the basis of at least one pressure value detected by the pressure sensor and on the basis of changes in the speed of the pressure booster pump.
  • the pressure sensor is preferably arranged behind a check valve, as described above.
  • the flow detection model can recognize the area of low flow from the fact that when the check valve is closed, which occurs at low flow, the measured pressure value no longer follows a change in the setpoint pressure. The That is, the limit for the low speed range in which the start-stop mode is switched on depends on the function of the check valve and preferably on its bias.
  • Fig. 1 shows schematically a pressure-increasing device in a drinking water supply line.
  • the pressure increasing device has a pressure booster pump 2, to which a check valve 4 is connected further downstream on the output side.
  • a buffer tank 6 is arranged on the outlet side of the check valve 4, which buffer tank can be designed in the usual way as a storage tank with a membrane and a closed air volume arranged above it.
  • a pressure sensor 8 is arranged further downstream, which detects the pressure P on the output side of the pressure increasing pump 2 and on the output side of the check valve 4.
  • a valve 10 is shown schematically, which is intended to represent one or more consumers, for example extraction points, and via which the flow in the line 5 is set on the outlet side of the check valve 4. It is to be understood that, instead of a valve 10, a branched network with a plurality of valves 10 can be connected to the line 5 in practice.
  • control device 12 which controls or regulates the pressure increasing pump 2.
  • the pressure booster pump 2 is switched on and off by the control device 12, on the one hand, but its speed is also regulated on the other.
  • the pressure booster pump 2 can be controlled via a speed controller, in particular a frequency converter.
  • the control device 12 is signal-connected to the pressure sensor 8, so that it receives the pressure values detected by the pressure sensor 8.
  • booster pump 2 instead of a single pressure increasing pump 2, several pressure increasing pumps connected in parallel and / or in series could also be used, which are controlled or regulated by the control device 12. If a booster pump 2 is described here, it is to be understood that this also expressly includes an arrangement of a plurality of booster pumps 2.
  • the pressure booster pump 2 When the pressure increasing device shown is in operation, there are preferably two operating states, namely an operating state of low flow and an operating state of high flow.
  • the pressure booster pump 2 In the high flow operating state, the pressure booster pump 2 preferably runs continuously and its speed is regulated via the control device 12 as a function of the pressure value detected at the pressure sensor 8 in order to achieve or maintain a setpoint pressure value.
  • the check valve 4 closes and the speed control of the pressure booster pump 2 no longer has any influence on reducing the pressure in the line 5.
  • pressure control as described above can no longer be carried out.
  • the pressure-increasing device switches to a start-stop mode in which the pressure-increasing pump 2 is switched on when the pressure P in the line 5 falls below a lower pressure limit value, and the pressure-increasing pump 2 is switched off when the pressure P in the line 5 has reached an upper pressure limit. This switching on and off of the pressure increasing pump 2 is accomplished by the control device 12.
  • FIG. 2a and Figure 2b the pressure P in the line 5 is plotted against the time t in the upper diagram.
  • the lower diagram shows the switch-on states of the pressure booster pump 2 over the time t. If the value is 1, the pressure increasing pump 2 is switched on;
  • Fig. 2a shows in the upper curve the pressure curve over time t with a small tank volume and in the lower curve the associated switch-on states.
  • the pressure booster pump 2 is always switched off when the upper pressure limit value P 1 is reached T A switched off. The pressure then falls to the lower pressure limit value P 2 .
  • the upper pressure limit value P 1 is reduced to the pressure limit value P 1 'and the lower pressure limit value P 2 is increased to the lower pressure limit value P 2 ', ie the hysteresis range is reduced to P 1 '- P 2 '.
  • the pressure difference between switching the pressure booster pump 2 off and on is thus reduced.
  • the time interval between the switching-off times T A and the switching-on times T E is also shortened again.
  • FIG. 7 which shows the pressure curve P over time t, similar to the upper curve in Figure 2b .
  • a first operating state a there is a low flow rate with a small tank volume.
  • the actual pressure P fluctuates around the pressure P u selected by the user in a relatively large range.
  • the switching intervals are short.
  • the operating state b in Fig. 7 represents a low flow condition with a larger tank volume.
  • the pressure fluctuations remain the same, but the intervals between switching the pressure increasing pump 2 on and off lengthen.
  • the operating range c represents a low flow rate with a large tank volume after the adjustment of the Pressure limit values P 1 and P 2 .
  • the switching intervals are shortened again.
  • the pressure fluctuation is reduced by the desired value P u .
  • the operating range d corresponds to an operating range with a high flow rate, in which the pressure increasing pump 2 is no longer operated in start-stop operation but in constant operation with pressure regulation. There are essentially no pressure fluctuations in this operating range.
  • Fig. 3 shows in a diagram the sequence of the regulation or control of the pressure booster pump 2 by the control device 12.
  • the in Fig. 3 The control components shown are integrated in the control device 12 or run there in corresponding modules. These are in particular software modules.
  • the physical system 14 and its influences on the control or regulation are shown in Fig. 3 indicated by the dashed line.
  • An essential component of the physical system 14 is a transfer function 16 which represents the hydraulic system or is formed by the hydraulic system and on which the conversion of the speed n of the pressure increasing pump 2 into the pressure P in the line 5 depends.
  • a user-dependent transfer function 18 which represents the influence of the position of the valve 10.
  • the speed n is the output variable of a pressure regulator 20 which is integrated in the control device 12.
  • the pressure regulator 20 is supplied with a setpoint pressure P S , from which the actual pressure P at the subtracter 22 is subtracted.
  • the setpoint pressure P S is calculated or output by a state control or state regulating module 24.
  • a pressure P u desired by the user is fed to the state control module 24 as an input variable.
  • the difference between the upper pressure limit value P 1 and the lower pressure limit value P 2 , ie a hysteresis range P 1 -P 2 is determined in a parameter module 28. This takes place on the basis of the parameters a 1 and b 1 determined in a prediction module 26.
  • a prediction model is used, which in the present example is an autoregressive model of the first order (ARX model). Its parameters a 1 and b 1 are determined in a prediction module 26.
  • the prediction module 26 is supplied with the actual pressure P, the speed n and a status value Z as input variables, the status value Z representing the operating range, namely an operating range of low flow or an operating range of high flow, with the start-stop- Operation is applied.
  • the regulation or control is adapted to the state of the physical system 14 by using the parameter module 28 the pressure control parameter in the form of the difference P 1 - P 2 of the pressure limit values P 1 and P 2 is adapted.
  • the difference between the pressure limit values P 1 and P 2 is an example of a pressure control parameter to be adapted.
  • pressure control parameters can also be adapted in a corresponding manner, for example parameters which flow into the pressure regulation.
  • the actual pressure limit values P 1 and P 2 are set by the state control module 24 based on the desired pressure P U , so that the desired pressure P U is preferably located in the middle of the hysteresis range P 1 -P 2 .
  • the control device 12 and in particular its status control module 24 have, in particular, an operating status recognition function in order to determine the area of low flow in which a start-stop operation is to take place. How this works is based on Fig. 4 explained.
  • Fig. 1 the lower curve shows the speed n of the booster pump 2 over time t.
  • the upper curve shows the pressure profile of the pressure P over time t, the solid line representing the actually measured pressure P at the pressure sensor 8 and the dashed line representing the setpoint pressure P S.
  • the middle diagram in Fig. 4 shows the flow rate Q over time t.
  • the three diagrams shown represent a chronologically parallel sequence. At time t1, the flow rate Q drops, so that the operating state changes from a state of high flow to the state of low flow or essentially no flow.
  • the actual pressure P initially increases and falls again to the setpoint pressure P S due to the pressure control carried out in the pressure regulator 20.
  • the detection takes place as to whether a state of lower flow is present.
  • the setpoint pressure P S and thus the speed n are reduced and a check is made as to whether the actual pressure profile P follows the profile of the setpoint pressure P S.
  • Fig. 4 clearly not the case.
  • the system then switches to start-stop mode.
  • the pressure increasing pump 2 is switched on between the times t3 and t4 and t5 and t6.
  • the speed n and thus the pressure P increase.
  • the pressure increasing pump 2 is switched off between times t4 and t5 and after time t6.
  • the speed initially drops.
  • the pressure P then drops more slowly, as shown in FIG Fig. 2 was explained.
  • a 1 and b 1 represent two parameters.
  • ⁇ represents a step size parameter and e the prediction error.
  • the mode of operation of the prediction error model for adapting the predicted pressure P p is based on Fig. 5 explained.
  • Fig. 5 shows in the upper diagram the pressure plotted against time t, the solid line showing the measured pressure P and the dashed line showing the predicted pressure P p .
  • the second diagram shows the prediction error e versus time t and the two lower curves represent the parameters a 1 and b 1 versus time t. It can be seen that the predicted pressure P p initially deviates significantly from the actual pressure P. This results in a prediction error e, on the basis of which the parameters a 1 and b 1 are adapted in such a way that the predicted pressure P p and the actual pressure P are made to coincide, that is to say the prediction error e is essentially zero.
  • this prediction error method is also used to adapt at least one pressure control parameter in the parameter module 28.
  • the pressure control parameter is the difference P 1 - P 2 between the pressure limit values P 1 and P 2 .
  • these pressure limit values are adapted on the basis of parameter b 1 .
  • a table is stored in the control device 12, in particular in the parameter module 28, which defines pressure differences between the pressure limit values P 1 and P 2 , ie pressure hysteresis ranges, for certain parameters b 1 .
  • pressure limit values P 1 and P 2 could also be stored directly in the table, but for this it would also be necessary to supply the desired pressure Pu to the parameter module 28 and to take this into account in the table.
  • a table from which the pressure difference P 1 -P 2 result can for example as in Fig. 6 look shown.
  • a pressure difference or a hysteresis range of 0.1 bar is provided between the pressure limit values P 1 and P 2
  • a pressure difference or hysteresis range of 0.5 bar is provided. It is conceivable that the table is designed in more detail in even more printing steps in order to enable a finer adjustment.
  • the described adaptation of the parameters a 1 and b 1 takes place preferably at operating points or in operating ranges of the pressure booster pump 2 in which a stable operating state, that is to say in particular a flow that is as constant as possible, is given.
  • a stable operating state that is to say in particular a flow that is as constant as possible.
  • the control device 12 is preferably designed in such a way that it recognizes these operating states. In particular, it recognizes a change in the flow rate from the fact that the Pressure suddenly changes or the actually measured pressure P deviates from the setpoint pressure P S.
  • control device 12 can be designed so that, for example, whenever the pressure booster pump 2 is switched on in start-stop operation, a parameter adjustment of the parameters a 1 and b 1 is carried out, provided that there are no changes in the pressure curve due to a change in the position of the Valve is detected.
  • the table, according to which the difference P 1 - P 2 of the pressure limit values P 1 and P 2 is adjusted, is predetermined in such a way that, depending on the parameter b 1, the pressure difference or pressure hysteresis range P 1 - P 2 is determined in such a way that the pressure difference is minimized without the number of switch-on operations of the booster pump 2 exceeding a certain limit. This is guaranteed by the predetermined table. Since the parameter b 1 is dependent on the course of the measured pressure P, the difference P 1 - P 2 of the pressure limit values P 1 and P 2 , which represents the pressure control parameter, are also calculated on the basis of the course of the measured pressure P adjusted.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Computer Hardware Design (AREA)
  • Structural Engineering (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Fluid Pressure (AREA)

Claims (15)

  1. Dispositif d'augmentation de pression pour l'augmentation de la pression d'un liquide passant par un conduit (5), avec au moins une pompe d'augmentation de pression (2), un dispositif de commande (12) qui commande la pompe d'augmentation de pression (2), ainsi qu'au moins un capteur de pression (8) disposé du côté de la sortie de la pompe d'augmentation de pression (2) et relié au dispositif de commande, le dispositif de commande (12) étant configuré de façon qu'il commande la pompe d'augmentation de pression (2) au moins dans une plage de fonctionnement en fonctionnement marche-arrêt de façon telle qu'il arrête la pompe d'augmentation de pression (2) lorsqu'une valeur limite supérieure de pression est atteinte et la met en route lorsqu'une valeur limite inférieure est atteinte,
    caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que, lors du fonctionnement marche-arrêt, il adapte automatiquement au moins un paramètre de commande de pression (P1, P2) du dispositif de commande (12) sur la base de l'évolution dans le temps d'au moins une valeur de pression (P) saisie par le capteur de pression.
  2. Dispositif d'augmentation de pression selon la revendication 1, caractérisé en ce que ledit au moins un paramètre de commande de pression (P1, P2) est la valeur limite supérieure et/ou inférieure ou une différence de pression (P1 - P2) entre les valeurs limites de pression supérieure et inférieure.
  3. Dispositif d'augmentation de pression selon la revendication 1 ou 2, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que l'adaptation dudit au moins un paramètre de commande de pression (P1, P2) s'effectue sur la base de l'évolution dans le temps de ladite au moins une valeur de pression (P) saisie, dans des périodes d'évaluation dans lesquelles un flux constant (Q) est donné dans le conduit (5).
  4. Dispositif d'augmentation de pression selon la revendication 3, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle qu'il dispose les périodes d'évaluation dans des périodes pendant lesquelles la pompe d'augmentation de pression (2) est activée lors du fonctionnement marche-arrêt.
  5. Dispositif d'augmentation de pression selon la revendication 3 ou 4, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle qu'il dispose les périodes d'évaluation dans des périodes pendant lesquelles un nombre de tours (n) de la pompe d'augmentation de pression (2) est augmenté ou diminué par le dispositif de commande.
  6. Dispositif d'augmentation de pression selon l'une des revendications 3 à 5, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle qu'il surveille l'évolution de la pression (P) dans les périodes d'évaluation et n'effectue une adaptation dudit paramètre de commande de pression (P1, P2) qu'aussi longtemps que l'évolution de la pression (P) suit une évolution de consigne de la pression (Ps) dans des limites prédéfinies.
  7. Dispositif d'augmentation de pression selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que, pour l'adaptation dudit au moins paramètre de commande de pression (P1, P2), il utilise une méthode d'erreur de prévision (prediction error system identification method).
  8. Dispositif d'augmentation de pression selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que le dispositif de commande (12) comprend un système de prévision (26) pour la prévision d'une valeur de pression (Pp) sur la base d'un modèle de prévision en fonction du nombre de tours (n) de la pompe d'augmentation de pression (2), et que le système de prévision (26) adapte, dans le cas d'un écart de la valeur de pression (P) réellement mesurée d'une valeur de pression prévue (Pp), au moins un paramètre (a1, b1) dans le modèle de prévision, sur la base d'un algorithme prédéterminé.
  9. Dispositif d'augmentation de pression selon la revendication 8, caractérisé en ce que le modèle de prévision est un modèle autorégressif (modèle ARX), en particulier un modèle autorégressif (modèle ARX) de premier ordre.
  10. Dispositif d'augmentation de pression selon la revendication 8 ou 9, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que ledit au moins paramètre de commande de pression (P1, P2) est déterminé en fonction dudit paramètre (a1, b1) dans le modèle de prévision, en particulier sur la base d'un algorithme prédéterminé ou d'une table.
  11. Dispositif d'augmentation de pression selon l'une des revendications 8 à 10, caractérisé en ce que le dispositif de commande (12) comprend un régulateur de pression (20) qui règle la pompe d'augmentation de pression (2) à la valeur de pression de consigne (Ps).
  12. Dispositif d'augmentation de pression selon la revendication 11, caractérisé en ce que ledit au moins paramètre de commande de pression est un paramètre de régulation dans le régulateur de pression (20).
  13. Dispositif d'augmentation de pression selon l'une des revendications précédentes, caractérisé en ce qu'un clapet anti-retour (4) est disposé du côté de la sortie de la pompe d'augmentation de pression (2).
  14. Dispositif d'augmentation de pression selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (12) est configuré de façon telle que, dans une plage de fonctionnement dans laquelle un flux (Q) est faible, il fait passer la pompe d'augmentation de pression (2) en fonctionnement marche-arrêt, et que, dans au moins une autre plage de fonctionnement, il règle la pompe d'augmentation de pression (2) par son nombre de tours (n) pour atteindre une augmentation de pression souhaitée.
  15. Dispositif d'augmentation de pression selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (12) comprend un module de reconnaissance de flux qui est configuré pour reconnaître la plage de fonctionnement d'un flux (Q) faible sur la base d'au moins une valeur de pression (P) saisie par le capteur de pression (8) et sur la base de changements d'une pression de consigne (Ps) de la pompe d'augmentation de pression (2).
EP15190110.5A 2015-10-16 2015-10-16 Dispositif d'augmentation de pression Active EP3156651B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15190110.5A EP3156651B1 (fr) 2015-10-16 2015-10-16 Dispositif d'augmentation de pression
RU2016140465A RU2658719C2 (ru) 2015-10-16 2016-10-14 Повышающее давление устройство
US15/293,708 US11326591B2 (en) 2015-10-16 2016-10-14 Pressure boosting device
CN201610902881.5A CN106869249B (zh) 2015-10-16 2016-10-17 增压装置

Applications Claiming Priority (1)

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EP15190110.5A EP3156651B1 (fr) 2015-10-16 2015-10-16 Dispositif d'augmentation de pression

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BR112019019726A2 (pt) 2017-03-22 2020-11-17 Jonathan Ballesteros aparelho, sistema e dispositivo de baixo fluxo
BE1026577B1 (nl) 2018-08-29 2020-03-30 Atlas Copco Airpower Nv Compressor of pomp voorzien van een sturing voor de regeling van een regelparameter en werkwijze voor de regeling daarbij toegepast
CN110454370B (zh) * 2019-08-19 2020-11-10 蘑菇物联技术（深圳）有限公司 一种动态优化空压站联控压力带的方法
DE102019213530A1 (de) * 2019-09-05 2021-03-11 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Wasserverteilungssystems
DE102020105670A1 (de) 2020-03-03 2021-09-09 KSB SE & Co. KGaA Druckerhöhungsanlage zur Erhöhung des Versorgungsdrucks in der Wasserversorgung wenigstens einer Entnahmestelle oder eines hydraulischen Verbrauchers
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RU2016140465A (ru) 2018-04-17
US11326591B2 (en) 2022-05-10
CN106869249A (zh) 2017-06-20
US20170107702A1 (en) 2017-04-20
CN106869249B (zh) 2020-06-19
EP3156651A1 (fr) 2017-04-19
RU2658719C2 (ru) 2018-06-22

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