CN113958516A - Method and equipment for measuring circulating water flow of circulating water pump - Google Patents
Method and equipment for measuring circulating water flow of circulating water pump Download PDFInfo
- Publication number
- CN113958516A CN113958516A CN202110948639.2A CN202110948639A CN113958516A CN 113958516 A CN113958516 A CN 113958516A CN 202110948639 A CN202110948639 A CN 202110948639A CN 113958516 A CN113958516 A CN 113958516A
- Authority
- CN
- China
- Prior art keywords
- circulating water
- water pump
- inlet
- determining
- outlet
- 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.)
- Pending
Links
Images
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
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- 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
Abstract
The invention discloses a method and a device for measuring circulating water flow of a circulating water pump, wherein the method comprises the following steps: acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data; determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump; the method comprises the steps of utilizing a neural network to model water flow data of the circulating water pump and inlet and outlet liquid pressure data of the circulating water pump, and directly determining a water flow value of the circulating water pump according to inlet and outlet liquid pressure values of the circulating water pump.
Description
Technical Field
The application relates to the technical field of turbo generator units, in particular to a method and equipment for measuring circulating water flow of a circulating water pump.
Background
The condenser vacuum of the power plant has important influence on the economy of the turbo generator unit. The condenser and the circulating water pump are key equipment of a unit vacuum system, the performance conditions of the condenser and the circulating water pump play an important role in unit vacuum and unit economy, and the flow of circulating water of a heat exchange tube bundle of the condenser directly influences the performance of the condenser.
In the prior art, a traditional measuring instrument is usually used for measuring the flow of circulating water of a heat exchange tube bundle of a condenser, but a large-sized turbo generator set is large in diameter of a circulating water pump (the diameter of an inlet pipeline and an outlet pipeline of the circulating water pump is more than 1 meter), the flow of the circulating water pump is large (more than 3 ten thousand tons per hour), and thus no precise instrument can accurately measure the flow of the circulating water on line at present. Most of circulating water pipelines of power plants are buried underground deeply, and straight pipe sections of pipelines exposed on the ground surface are short and cannot meet the measurement requirements of some measuring instruments (such as ultrasonic measuring instruments), so that the measuring instruments cannot accurately measure the flow of large-caliber circulating water pumps.
Therefore, how to measure the circulating water flow of the large-caliber circulating water pump quickly and accurately is a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention provides a method for measuring circulating water flow of a circulating water pump, which is used for solving the technical problem that the circulating water flow of the circulating water pump cannot be measured quickly and accurately in the prior art, and comprises the following steps:
acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data;
determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump;
and modeling the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, and directly determining the water flow value of the circulating water pump according to the inlet and outlet liquid pressure values of the circulating water pump.
Preferably, a neural network is used for modeling the water flow data of the circulating water pump and the liquid pressure data of the inlet and the outlet of the circulating water pump, and the water flow value of the circulating water pump is directly determined by the liquid pressure value of the inlet and the outlet of the circulating water pump, specifically:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet and outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
Preferably, the method comprises the steps of acquiring operation data of a power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data, and specifically comprises the following steps:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
Preferably, the lift value of the circulating water pump and the water flow value of the circulating water pump are determined according to the actual rotating speed of the circulating water pump, and the method specifically comprises the following steps:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
Preferably, before the operation data of the power plant unit is obtained in real time and the actual rotating speed of the circulating water pump is determined according to the operation data, the method further comprises the following steps:
and performing dead pixel judgment and true value judgment on the collected operation data.
Preferably, the operation data includes input frequency, pole number, actual rated power, rated rotation speed, rated voltage, rated current, height of an inlet and an outlet of the circulating water pump, liquid pressure of the inlet and the outlet of the circulating water pump, radius of an inlet and an outlet pipeline of the circulating water pump, and the like of the motor.
Correspondingly, the invention also provides a device for measuring the circulating water flow of the circulating water pump, which comprises:
the first determining module is used for acquiring the operation data of the power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data;
the second determining module is used for determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump;
and the third determining module is used for modeling the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, and directly determining the water flow value of the circulating water pump according to the inlet and outlet liquid pressure values of the circulating water pump.
Preferably, the third determining module is specifically configured to:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet and outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
Preferably, the first determining module is specifically configured to:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
Preferably, the second determining module is specifically configured to:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a method and a device for measuring circulating water flow of a circulating water pump, wherein the method comprises the following steps: acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data; determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump; the method comprises the steps of utilizing a neural network to model water flow data of the circulating water pump and inlet and outlet liquid pressure data of the circulating water pump, and directly determining a water flow value of the circulating water pump according to an inlet and outlet liquid pressure value of the circulating water pump.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for measuring a circulating water flow rate of a circulating water pump according to an embodiment of the present invention;
fig. 2 shows a schematic structural diagram of a device for measuring the circulating water flow rate of a circulating water pump according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
As described in the background art, although a measuring instrument is used for measuring the circulating water flow of the circulating water pump in the prior art, some existing methods have the problems that the circulating water flow of the circulating water pump cannot be measured quickly and accurately, particularly the circulating water flow of the large-caliber circulating water pump cannot be measured and the like.
In order to solve the above problems, an embodiment of the present application provides a method and an apparatus for measuring a circulating water flow rate of a circulating water pump, where the method includes: acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data; determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump; the method comprises the steps of utilizing a neural network to model water flow data of the circulating water pump and inlet and outlet liquid pressure data of the circulating water pump, and directly determining a water flow value of the circulating water pump according to inlet and outlet liquid pressure values of the circulating water pump.
Fig. 1 is a schematic flow chart of a method for measuring a circulating water flow rate of a circulating water pump according to an embodiment of the present invention, the method including:
s101, acquiring operation data of the power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data.
Specifically, real-time operation data of a circulating water pump system of the power plant unit DCS system are collected, and the actual rotating speed of the circulating water pump is determined through operation according to the collected operation data.
In order to accurately acquire the actual rotating speed of the circulating water pump, in a preferred embodiment of the scheme, the operation data of the power plant unit is acquired in real time, and the actual rotating speed of the circulating water pump is determined according to the operation data, specifically:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
Specifically, the actual rotation speed of the motor is obtained according to the following formula:
ns＝60*f2/(p/2)；
Sn＝(ns-ne)/ns；
Sns＝0.5*1-(1-4*(1-Sn)*Sn*Pns/Pn)0.5)；
n02＝60*f2/(p/2)；
nns＝(1-Sns)*n02；
A＝Sns/(1-Sns)2；
S2＝0.5*((2+1/A)-((2+1/A)2-4)0.5)；
n2＝(1-S2)*n02。
wherein ns is the synchronous rotating speed of the motor, f2 is the input frequency of the motor, p is the pole number of the motor, Sn is the rated slip of the motor, ne is the rated slip of the motor, Sns is the actual rated slip of the motor, Pn is the rated power of the motor, Pns is the actual rated power of the motor (the rated power of the circulating water pump), nns is the actual rated rotating speed of the motor, S2 is the actual slip of the motor, n02 is the actual synchronous rotating speed of the motor, A is an intermediate variable (dimensionless), and n2 is the actual rotating speed of the motor. The obtained unit operation data comprises the input frequency, the rated rotating speed, the pole number, the rated power, the actual rated power and the like of the motor. The actual rotational speed of the motor can thus be derived.
In order to accurately obtain the circulating water flow rate of the circulating water pump, in a preferred embodiment of the present disclosure, before obtaining the operation data of the power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data, the method further includes:
and performing dead pixel judgment and true value judgment on the collected operation data.
Specifically, collected unit operation data are preprocessed, wherein the preprocessing comprises dead pixel judgment, true value judgment and the like, errors of calculated results caused by data distortion are prevented, and water flow is accurately circulated.
And S102, determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump.
Specifically, after the actual rotating speed of the circulating water pump is obtained, a formula of a circulating water pump lift value and a formula of a circulating water pump water flow value are obtained by using a circulating water pump standard characteristic curve, and the formula of the circulating water pump lift value and the formula of the circulating water pump water flow value are obtained by using a bernoulli equation. And combining the two formulas to obtain the lift value of the circulating water pump and the water flow value of the circulating water pump.
In order to accurately obtain the lift value of the circulating water pump and the water flow value of the circulating water pump, in a preferred embodiment of the present disclosure, the lift value of the circulating water pump and the water flow value of the circulating water pump are determined according to the actual rotating speed of the circulating water pump, and specifically:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
Specifically, a first characteristic curve of the circulating water pump at the actual rotating speed is determined according to a proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump, namely a standard characteristic curve, a relational expression of a lift value of the circulating water pump and a water flow value of the circulating water pump can be determined according to the first characteristic curve, another relational expression of the lift value of the circulating water pump and the water flow value of the circulating water pump is obtained according to the bernoulli theorem, and the lift value of the circulating water pump and the water flow value of the circulating water pump are finally obtained by combining the two expressions.
H＝f(Q)＝(n2/ne)2*f(Q)；
H＝(p2-p1)/(ρg)+【(v2)2-(v12)】/2g+z2-z1，v1＝4Q/(πd12)，
v2＝4Q/(πd22)；
H is the lift value of the circulating water pump, Q is the water flow value of the circulating water pump, n2 is the actual rotating speed of the circulating water pump, and p1 and p2 are the liquid pressure values of the inlet and the outlet of the circulating water pump; v1 and v2 are liquid flow rates at the inlet and the outlet of the circulating water pump, z1 and z2 are height values of the inlet and the outlet of the circulating water pump, and d1 and d2 are radiuses of pipelines at the inlet and the outlet of the circulating water pump.
In order to accurately obtain the water flow value of the circulating water pump, in a preferred embodiment of the present disclosure, the operation data includes an input frequency, a pole number, an actual rated power, a rated rotation speed, a rated voltage, a rated current, a height of an inlet and an outlet of the circulating water pump, a liquid pressure of the inlet and the outlet of the circulating water pump, a radius of an inlet and an outlet pipeline of the circulating water pump, and the like of the motor.
Specifically, the operation data of the power plant unit comprises input frequency, pole number, actual rated power, rated rotating speed, rated voltage, rated current, inlet and outlet height of the circulating water pump, inlet and outlet liquid pressure of the circulating water pump, inlet and outlet pipeline radius of the circulating water pump and the like of the motor, and a water flow value is finally obtained according to known data.
S103, modeling is carried out on water flow data of the circulating water pump and inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, and the water flow value of the circulating water pump is directly determined according to the inlet and outlet liquid pressure values of the circulating water pump.
Specifically, modeling is carried out on the obtained water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, an inlet and outlet pressure-flow model of the circulating water pump is constructed, and the water flow value of the circulating water pump is directly determined according to the inlet and outlet liquid pressure value of the circulating water pump.
In order to determine the water flow value of the circulating water pump quickly and accurately, in a preferred embodiment of the present disclosure, a neural network is used to model the water flow data of the circulating water pump and the liquid pressure data at the inlet and the outlet of the circulating water pump, and the water flow value of the circulating water pump is directly determined according to the liquid pressure values at the inlet and the outlet of the circulating water pump, specifically:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet and outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
Specifically, the obtained water flow value of the circulating water pump and the corresponding inlet and outlet liquid pressure values of the circulating water pump are written into a database to obtain water flow data of the circulating water pump and inlet and outlet pressure data of the circulating water pump, normalization and continuation processing are carried out on the water flow data of the circulating water pump and the inlet and outlet pressure data of the circulating water pump to establish a neural network, a BP algorithm is adopted to train the neural network, the water flow of the circulating water pump can be approximated by a three-layer feedforward neural network, and a learned target function is as follows: yj ═ f (i ═ 0 Σ n wi ×) where f is the selected activation function, and the ReLU function is selected as the excitation function for the hidden neurons, as follows:
where n is the number of samples, yj is the expected output, and xi is the model input. The weight value of the neural network is corrected by adopting a speed gradient descent method, a circulating water pump inlet and outlet pressure-flow model can be finally obtained after the neural network is trained, and the circulating water pump water flow value is directly obtained from the circulating water pump inlet and outlet liquid pressure value based on the circulating water pump inlet and outlet pressure-flow model. The online soft measurement of the flow of the circulating water pump is realized, the difficulty that the online measurement of the flow of the circulating water of the power plant is inaccurate and the offline measurement is not good is solved, and a basis is provided for the real-time monitoring and diagnosis of a cold end system of the turbo generator unit.
In order to further explain the technical idea of the present invention, the technical solution of the present invention is now described with reference to specific application scenarios.
The method comprises the following specific steps:
first, data acquisition is performed.
The method comprises the steps of collecting real-time operation data of a circulating water pump system of a power plant unit DCS system, wherein the operation data comprise input frequency, pole number, actual rated power, rated rotating speed, rated voltage, rated current of a motor, inlet and outlet height of a circulating water pump, inlet and outlet liquid pressure of the circulating water pump, inlet and outlet pipeline radius of the circulating water pump and the like. And then, preprocessing the operation data, including dead pixel judgment, true value judgment and the like, so as to prevent the error of the calculated result caused by data distortion and accurately ensure the circulating water flow of the circulating water pump.
And secondly, determining the actual rotating speed of the circulating water pump.
The actual rotation speed of the motor is obtained according to the formula as follows:
ns＝60*f2/(p/2)；
Sn＝(ns-ne)/ns；
Sns＝0.5*1-(1-4*(1-Sn)*Sn*Pns/Pn)0.5)；
n02＝60*f2/(p/2)；
nns＝(1-Sns)*n02；
A＝Sns/(1-Sns)2；
S2＝0.5*((2+1/A)-((2+1/A)2-4)0.5)；
n2＝(1-S2)*n02。
wherein ns is the synchronous rotating speed of the motor, f2 is the input frequency of the motor, p is the pole number of the motor, Sn is the rated slip of the motor, ne is the rated slip of the motor, Sns is the actual rated slip of the motor, Pn is the rated power of the motor, Pns is the actual rated power of the motor (the rated power of the circulating water pump), nns is the actual rated rotating speed of the motor, S2 is the actual slip of the motor, n02 is the actual synchronous rotating speed of the motor, A is an intermediate variable (dimensionless), and n2 is the actual rotating speed of the motor.
And thirdly, circularly determining the lift value of the circulating water pump and the water flow value of the circulating water pump.
Determining a first characteristic curve of the circulating water pump under the actual rotating speed according to a proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump, determining a relational expression of a circulating water pump lift value and a circulating water pump water flow value according to the first characteristic curve, obtaining another circulating water pump lift value and a relational expression of the circulating water pump water flow value according to Bernoulli's theorem, and finally obtaining the circulating water pump lift value and the circulating water pump water flow value by combining the first characteristic curve and the relational expression.
And fourthly, modeling data.
Writing the obtained water flow value of the circulating water pump and the corresponding inlet and outlet liquid pressure values of the circulating water pump into a database to obtain water flow data of the circulating water pump and inlet and outlet pressure data of the circulating water pump, carrying out normalization and continuation processing on the water flow data of the circulating water pump and the inlet and outlet pressure data of the circulating water pump to establish a neural network, training the neural network by adopting a BP algorithm, finally obtaining an inlet and outlet pressure-flow model of the circulating water pump after the neural network is trained, and directly obtaining the water flow value of the circulating water pump from the inlet and outlet liquid pressure values of the circulating water pump based on the inlet and outlet pressure-flow model of the circulating water pump. The online soft measurement of the flow of the circulating water pump is realized, the problems of inaccurate online measurement and poor offline measurement of the flow of the circulating water in the power plant are solved, and a basis is provided for the real-time monitoring and diagnosis of a cold end system of the turbo generator unit.
By applying the technical scheme, the invention discloses a method and equipment for measuring circulating water flow of a circulating water pump, wherein the method comprises the following steps: acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data; determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump; the method is characterized in that a neural network is utilized to model water flow data of the circulating water pump and inlet and outlet liquid pressure data of the circulating water pump, and the water flow value of the circulating water pump is directly determined according to the inlet and outlet liquid pressure value of the circulating water pump.
In order to achieve the above technical object, an embodiment of the present application further provides an apparatus for measuring a flow rate of a circulating water pump, as shown in fig. 2, the apparatus including:
the first determining module 201 is used for acquiring operation data of a power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data;
a second determining module 202, configured to determine the head value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotational speed of the circulating water pump;
and the third determining module 203 is configured to utilize a neural network to model the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump, and directly determine the water flow value of the circulating water pump according to the inlet and outlet liquid pressure values of the circulating water pump.
In a specific application scenario, the third determining module is specifically configured to:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet and outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
In a specific application scenario, the first determining module is specifically configured to:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
In a specific application scenario, the second determining module is specifically configured to:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A method for measuring the circulating water flow of a circulating water pump is characterized by comprising the following steps:
acquiring operation data of a power plant unit in real time and determining the actual rotating speed of a circulating water pump according to the operation data;
determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump;
and modeling the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, and directly determining the water flow value of the circulating water pump according to the inlet and outlet liquid pressure values of the circulating water pump.
2. The method according to claim 1, wherein the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump are modeled by using a neural network, and the water flow value of the circulating water pump is directly determined by the inlet and outlet liquid pressure value of the circulating water pump, specifically:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet/outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
3. The method according to claim 1, characterized by acquiring operation data of the power plant unit in real time and determining the actual rotation speed of the circulating water pump according to the operation data, specifically:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
4. The method according to claim 1, characterized in that the circulating water pump head value and the circulating water pump water flow value are determined according to the actual rotating speed of the circulating water pump, specifically:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
5. The method of claim 2, wherein before obtaining operating data of the power plant unit in real time and determining an actual rotational speed of the circulating water pump based on the operating data, further comprising:
and performing dead pixel judgment and true value judgment on the collected operation data.
6. The method of claim 5, wherein the operational data includes input frequency, pole count, actual power rating, speed rating, voltage rating, current rating, inlet and outlet height of the circulating water pump, inlet and outlet fluid pressure of the circulating water pump, inlet and outlet pipe radius of the circulating water pump, and the like, of the electric motor.
7. An apparatus for measuring a flow rate of circulating water of a circulating water pump, the apparatus comprising:
the first determining module is used for acquiring the operation data of the power plant unit in real time and determining the actual rotating speed of the circulating water pump according to the operation data;
the second determining module is used for determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the actual rotating speed of the circulating water pump;
and the third determining module is used for modeling the water flow data of the circulating water pump and the inlet and outlet liquid pressure data of the circulating water pump by utilizing a neural network, and directly determining the water flow value of the circulating water pump according to the inlet and outlet liquid pressure values of the circulating water pump.
8. The device of claim 7, wherein the third determination module is specifically configured to:
carrying out normalization and continuation processing on the collected water flow data of the circulating water pump and the pressure data of the inlet and the outlet of the circulating water pump to establish a neural network;
training the neural network according to a BP algorithm, and determining an inlet/outlet pressure-flow model of the circulating water pump after the neural network is trained;
and directly determining the water flow value of the circulating water pump according to the pressure value of the liquid at the inlet and the outlet of the circulating water pump based on the pressure-flow model at the inlet and the outlet of the circulating water pump.
9. The device of claim 7, wherein the first determination module is specifically configured to:
and determining the actual rotating speed of the motor according to the input frequency, the rated rotating speed, the pole number, the rated power and the actual rated power of the motor.
10. The device of claim 7, wherein the second determination module is specifically configured to:
determining a first characteristic curve of the circulating water pump under the actual rotating speed according to the proportional law of the circulating water pump and a preset characteristic curve of the circulating water pump;
and determining the lift value of the circulating water pump and the water flow value of the circulating water pump according to the first characteristic curve and Bernoulli theorem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948639.2A CN113958516A (en) | 2021-08-18 | 2021-08-18 | Method and equipment for measuring circulating water flow of circulating water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110948639.2A CN113958516A (en) | 2021-08-18 | 2021-08-18 | Method and equipment for measuring circulating water flow of circulating water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113958516A true CN113958516A (en) | 2022-01-21 |
Family
ID=79460487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110948639.2A Pending CN113958516A (en) | 2021-08-18 | 2021-08-18 | Method and equipment for measuring circulating water flow of circulating water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113958516A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076128A (en) * | 2022-06-24 | 2022-09-20 | 广州安捷制造有限公司 | Water pump water flow measuring method, device, equipment and storage medium |
| CN116292336A (en) * | 2023-05-12 | 2023-06-23 | 安徽明泉水设备有限公司 | Water pump blade detection method |
| CN117662450A (en) * | 2024-01-30 | 2024-03-08 | 合肥新沪屏蔽泵有限公司 | Water pump fluid flow determination method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612930Y (en) * | 2003-03-28 | 2004-04-21 | 广州三业科技有限公司 | Diesel engine water pump flow detecting and overload-proof apparatus |
| CN105675066A (en) * | 2016-01-19 | 2016-06-15 | 中国农业大学 | Flow measurement method and device |
| CN111237181A (en) * | 2020-01-10 | 2020-06-05 | 常州英集动力科技有限公司 | On-line identification and optimal regulation and control method and regulation and control system for operating characteristics of water pump system |
| CN111947900A (en) * | 2019-05-15 | 2020-11-17 | 莱斯特里兹泵吸有限责任公司 | Method for determining the flow rate of a fluid delivered by a pump |
-
2021
- 2021-08-18 CN CN202110948639.2A patent/CN113958516A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2612930Y (en) * | 2003-03-28 | 2004-04-21 | 广州三业科技有限公司 | Diesel engine water pump flow detecting and overload-proof apparatus |
| CN105675066A (en) * | 2016-01-19 | 2016-06-15 | 中国农业大学 | Flow measurement method and device |
| CN111947900A (en) * | 2019-05-15 | 2020-11-17 | 莱斯特里兹泵吸有限责任公司 | Method for determining the flow rate of a fluid delivered by a pump |
| CN111237181A (en) * | 2020-01-10 | 2020-06-05 | 常州英集动力科技有限公司 | On-line identification and optimal regulation and control method and regulation and control system for operating characteristics of water pump system |
Non-Patent Citations (1)
| Title |
|---|
| 董恩山等: "《内外线电机》", pages: 56 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076128A (en) * | 2022-06-24 | 2022-09-20 | 广州安捷制造有限公司 | Water pump water flow measuring method, device, equipment and storage medium |
| CN115076128B (en) * | 2022-06-24 | 2024-01-02 | 广州安捷制造有限公司 | Water pump water flow measurement method, device, equipment and storage medium |
| CN116292336A (en) * | 2023-05-12 | 2023-06-23 | 安徽明泉水设备有限公司 | Water pump blade detection method |
| CN116292336B (en) * | 2023-05-12 | 2023-09-19 | 安徽明泉水设备有限公司 | Water pump blade detection method |
| CN117662450A (en) * | 2024-01-30 | 2024-03-08 | 合肥新沪屏蔽泵有限公司 | Water pump fluid flow determination method and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113958516A (en) | Method and equipment for measuring circulating water flow of circulating water pump | |
| CN105042339B (en) | One kind is based on nondimensional leakage of finished oil pipeline amount estimating system and method | |
| CN109190166B (en) | Cavitation judgment and state evaluation method and system for vane pump | |
| CN107202028B (en) | A kind of turbocharger centrifugal compressor surge recognition methods | |
| CN108360608B (en) | Pipe burst identification and positioning method for water delivery pipe of water supply system | |
| CN106936627B (en) | Thermal power equipment performance monitoring method based on big data analysis and mining | |
| CN109425483A (en) | Running of wind generating set status assessment and prediction technique based on SCADA and CMS | |
| CN108435819B (en) | Energy consumption abnormity detection method for aluminum profile extruder | |
| CN110244205A (en) | Cable accessory Recognition of Partial Discharge based on convolutional neural networks under a kind of small data quantity | |
| CN106121622B (en) | A kind of Multiple faults diagnosis approach of the Dlagnosis of Sucker Rod Pumping Well based on indicator card | |
| CN114109859B (en) | Centrifugal pump performance neural network prediction method without flow sensing | |
| CN110188143A (en) | A kind of power plant Vibration Trouble of Induced Draft Fan diagnostic method | |
| CN111174990A (en) | Pipeline leakage detection and leakage position positioning device and method and simulation test device and method | |
| CN106404091B (en) | A kind of pumping plant flow survey method based on volumetric method | |
| CN100348863C (en) | Method for measuring pump characteristic curve by means of pipeline characteristic curve | |
| CN110807231B (en) | Water pump operation efficiency online detection method and detection device | |
| CN112686181B (en) | Hydraulic turbine fault diagnosis method based on interpolation axis track | |
| CN104298806A (en) | Hydropower station dynamic property computer-assisted testing method | |
| CN110032155A (en) | A kind of thermal power plant's system of sea cooling water running optimizatin instructs system | |
| CN109408978A (en) | A kind of circulating water flow online soft sensor method | |
| CN116205087B (en) | Rain and sewage drainage pipe network anomaly analysis method and device based on edge computing gateway | |
| CN115600933B (en) | Electric meter power quality detection method and system based on Internet of things | |
| CN105090084B (en) | Draught fan online monitoring system and method | |
| CN111553226A (en) | Method for extracting river monitoring section water surface width based on remote sensing interpretation technology | |
| CN110686830B (en) | On-line diesel engine piston ring state detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |