CN112963338B - Water pump visual optimization operation control method, device, equipment, system and medium - Google Patents
Water pump visual optimization operation control method, device, equipment, system and medium Download PDFInfo
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- CN112963338B CN112963338B CN202110304577.1A CN202110304577A CN112963338B CN 112963338 B CN112963338 B CN 112963338B CN 202110304577 A CN202110304577 A CN 202110304577A CN 112963338 B CN112963338 B CN 112963338B
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- 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
Abstract
The invention discloses a method, a device, equipment, a system and a medium for controlling the visual optimized operation of a water pump, wherein the method comprises the following steps: establishing a water pump working condition operation model comprising a high-efficiency region and a non-high-efficiency region, and establishing a functional relation between current and water pump lift, flow and efficiency; collecting operating parameters of a water pump and a motor thereof, and calculating to obtain the flow, the lift and the efficiency of the water pump motor; adding a current operating condition point consisting of lift and flow to a water pump operating condition model; if the current is not in the high-efficiency working condition area, based on the functional relation between the current and the pump lift, the flow and the efficiency of the water pump, the current reduction and the maximum of the motor are taken as targets, and the optimal working condition point is optimized in the high-efficiency working condition area under the condition of the actual working requirements of the pump lift, the flow and the efficiency of the water pump; and correspondingly adjusting the operation parameters of the water pump according to the optimal working condition point, and calculating and displaying the variable quantity of the motor current. The invention is convenient for water pump operation and maintenance personnel to judge whether the working point operates efficiently, realizes automatic adjustment of the working point to the efficient area, and saves power consumption.
Description
Technical Field
The invention belongs to the field of water supply, and particularly relates to a water pump visual optimization operation control method, device, equipment, system and medium based on the Internet of things.
Background
The operational reliability, low power consumption and operational optimization of the water pump are the concerns of the pump industry, and are the consideration basis for selecting the water pump and the pump system by a design unit. The performance of a water pump can be represented by a set of performance curves that are constructed from the differences in its head (inlet and outlet pressure), flow rate and installation (pipe resistance). The curve is a function of head, flow, power consumption and efficiency. A typical water pump manufacturing plant derives measurements, typically modeled as a type of pump, from the process of liquid (water) flowing through the pump, water being directed from the inlet of the pump into the center of the rotating blades and thus being thrown towards the edge of the impeller. The curve is released (advertised) in the specification and given to the customer along with the pump. The water pump optimization design house designs a pump system (the design of a pipeline device and the pipe resistance factor) by combining a water pump performance (characteristic) curve with an application scene (a water taking or water supplying pump station). In order to meet the requirements (such as the outlet pressure and the flow of a main pipe) of an application scene, an end user (such as a water taking or water supply pump station) operates, operates and maintains, but rarely pays attention to whether the actual working condition operating point of the water pump is in a high-efficiency design operating area.
And the operation energy consumption of the water pump system is the main operation and maintenance cost. When a water pump terminal user (such as a pump station or an industrial circulating water system) needs to improve the operation efficiency and reduce the operation cost, a water pump and a system expert are requested to measure and analyze according to the actual operation condition, an operation optimization design parameter is given by combining the system design load (including a water pump performance characteristic curve) and the actual requirement, and the optimal operating condition point of the water pump device is ensured by adjusting according to the optimized and adjusted actual operation condition.
Disclosure of Invention
The invention provides a water pump visual optimization operation control method, a water pump visual optimization operation control device, water pump visual optimization operation control equipment, a water pump visual optimization operation control system and a water pump visual optimization operation control medium based on the Internet of things, which are suitable for operation and maintenance personnel of a water pump system to visually judge whether a water pump operates efficiently or not, the optimal working condition point of the water pump is automatically optimized under a non-efficient operation working condition, and the optimized operation can save a large amount of power consumption.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a water pump visualization optimization operation control method based on the Internet of things comprises the following steps:
establishing a water pump working condition operation model comprising a high-efficiency operation working condition area and a non-high-efficiency operation working condition area according to the type of the water pump; establishing a functional relation model of the motor current of the water pump related to the lift, flow and efficiency of the water pump;
the method comprises the steps of collecting the flow Q and the inlet and outlet pressure of a water pump and the working current, voltage and frequency of a water pump motor in real time, calculating the lift H of the water pump according to the inlet and outlet pressure, and calculating the output power P of the water pump motor according to the working current and voltage of the water pump motor 2 According to the flow Q and the lift H of the water pump and the output power P of the water pump motor 2 Computing water pumpEfficiency η of p (ii) a Adding a current operating condition point of the water pump consisting of the lift H and the flow Q into a water pump operating condition operating model;
if the current operating condition point of the water pump is not in the high-efficiency operating condition area, based on a functional relation model of the motor current related to the pump lift, flow and efficiency, the maximum reduction of the motor current is taken as a target, and the optimal operating condition point is optimized in the high-efficiency operating condition area under the condition of the actual operating requirements of the pump lift, flow and efficiency;
according to the optimal working condition point obtained by optimization, the flow Q ', the lift H' and the efficiency eta of the water pump are corresponding p And', adjusting the operation parameters of the water pump, and calculating and displaying the variation of the current of the motor.
In a more preferred technical solution, the actual working requirement of the pump head, the flow rate and the efficiency means that the variation of the flow rate, the pump head and/or the efficiency is within a preset range.
In a more optimal technical scheme, the flow and inlet and outlet pressure of the water pump and the working current, voltage and frequency of a water pump motor are acquired by adopting a sensor with an internet of things communication module and uploaded in real time.
In a more preferred embodiment, the functional relationship model of the motor current of the water pump with respect to the pump head, flow rate and efficiency is expressed as:
wherein I is the working current of the water pump motor, U is the working voltage of the water pump motor, Q is the flow of the water pump, H is the lift of the water pump, cos phi is the power factor of the water pump motor, eta is m Efficiency of the water pump motor, eta p Is the efficiency of the water pump.
In a more optimal technical scheme, the optimal working condition point is optimized by adopting a maximum likelihood estimation algorithm.
The utility model provides a visual operation controlling means that optimizes of water pump based on thing networking, includes:
the system comprises a working condition coordinate system and motor current functional relation pre-establishing module, and is used for: establishing a water pump working condition operation model comprising a high-efficiency operation working condition area and a non-high-efficiency operation working condition area according to the type of the water pump; establishing a functional relation model of the motor current of the water pump related to the lift, flow and efficiency of the water pump;
a current operating condition point determination module to: the method comprises the steps of collecting the flow Q and the inlet and outlet pressure of a water pump and the working current, voltage and frequency of a water pump motor in real time, calculating the lift H of the water pump according to the inlet and outlet pressure, and calculating the output power P of the water pump motor according to the working current and voltage of the water pump motor 2 According to the flow Q and the lift H of the water pump and the output power P of the water pump motor 2 Calculating efficiency eta of water pump p (ii) a Adding a current operating condition point of the water pump consisting of the lift H and the flow Q into a water pump operating condition operating model;
an optimal operating point optimizing module for: if the current operating condition point of the water pump is not in the high-efficiency operating condition area, optimizing the optimal operating condition point in the high-efficiency operating condition area by taking the actual working requirements of the pump lift, the flow and the efficiency of the water pump as conditions and taking the reduced quantity of the motor current as a target based on a functional relation model of the motor current relative to the pump lift, the flow and the efficiency of the water pump;
a parameter adjustment module to: according to the optimal working condition point obtained by optimization, the flow Q ', the lift H' and the efficiency eta of the water pump are corresponding p And', adjusting the operation parameters of the water pump and calculating the variation of the current of the motor.
An electronic device comprises a memory and a processor, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is enabled to implement the water pump visualization optimization operation control method based on the internet of things according to any one of the technical schemes.
A water pump visualization optimization operation control system based on the Internet of things comprises a plurality of sensors of the Internet of things, a display and the equipment in the technical scheme; the sensor of the internet of things is used for acquiring the flow Q and the inlet and outlet pressure of the water pump and the working current, voltage and frequency of a water pump motor in real time and uploading the working current, voltage and frequency to the equipment; the display is used for displaying the variation of the motor current calculated by the equipment.
A computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the method for controlling visualization and optimized operation of a water pump based on the internet of things according to any one of the above technical solutions is implemented.
Advantageous effects
The invention obtains the flow rate, inlet and outlet pressure of the water pump and the working current, voltage and frequency of the water pump motor in real time, and converts the flow rate, inlet and outlet pressure and working current, voltage and frequency into the current running lift H, flow Q and efficiency eta p The current operating condition point of the water pump, which is easy to understand by the operation and maintenance personnel of the water pump system, is obtained and expressed in the operating model of the water pump, and the operation and maintenance personnel of the water pump system can intuitively judge whether the current operating condition point of the water pump operates efficiently or not; if the water pump is not operated efficiently, based on a functional relation model of the motor current related to the pump lift, the flow and the efficiency of the water pump, the maximum reduction of the motor current is taken as a target, the actual working requirements of the pump lift, the flow and the efficiency of the water pump are taken as conditions, the optimal working condition point is optimized in the efficient operation working condition area by adopting a maximum possibility estimation algorithm, the efficient operation of the water pump is realized, and the power consumption is saved considerably.
Drawings
FIG. 1 is a characteristic curve, efficiency curve, stack assembly curve, power curve for a water pump;
FIG. 2 is a model of operation of the water pump according to the present embodiment;
FIG. 3 is a statistical plot of operating points of the present embodiment against historical data;
FIG. 4 is a diagram illustrating the effect of moving the operating point from the non-efficient operating region to the efficient operating region on the power consumption of the water pump according to the present embodiment;
FIG. 5 is a flowchart illustrating the optimization of the optimal operating point by applying Maximum Likelihood Estimation (MLE) according to this embodiment.
Detailed Description
The following describes embodiments of the present invention in detail, which are developed based on the technical solutions of the present invention, and give detailed implementation manners and specific operation procedures to further explain the technical solutions of the present invention.
The invention effectively converts the operation data of the pump system into the working condition points in the working condition coordinate system by adopting the technology of the Internet of things, optimizes the optimal working point of the current operation working condition point in the efficient working condition area of the working condition coordinate system, is convenient for any operation and maintenance personnel of the pump system to understand and adjust the operation parameters of the water pump, ensures that the water pump operates under the efficient working condition and can save energy consumption.
The method integrates water pump operation data (including historical data), combines a water pump system (including a pump station main pipe device system) and working condition operation area modeling by using the technology of the Internet of things. The method comprises the steps that data are obtained through an internet of things sensor, real-time operation data are accumulated in a cloud database, a data interface is provided by a cloud platform to import historical data, and therefore a set of pump system operation condition points are obtained through calculation and displayed in a water pump system operation condition model area. And establishing a multivariate corresponding function relation with the water pump operation data at any point in the water pump working condition model area. The water pump working condition model area is divided into a high-efficiency (optimized) operation working condition area and a non-high-efficiency operation working condition area. And translating the working condition points in the non-efficient operation working condition area to the efficient operation working condition area, wherein the multivariate nonlinear difference between a group of 'water pump operation data' generated after the movement and the water pump operation data of the working condition points before the movement is generated is a visualization result of the water pump operation optimization solution. If we design an optimization solution aiming at the non-efficient operation condition point, the result is equivalent to the difference, and the prediction operation optimization economic benefit is actually reflected, such as the parallel operation of a plurality of pumps (the output power of a single pump is adjusted), and the frequency (motor) is adjusted. Therefore, the change of economic benefits after the system is optimized can be displayed in a quantitative digital form by fully utilizing real-time collected data and historical data in the operation of moving working condition points of the water pump working condition model, and the advantages of the technology of the Internet of things are exerted.
Example 1
The embodiment 1 provides a water pump visualization optimal operation control method based on the internet of things, which includes the following steps:
The performance of a water pump (taking a centrifugal pump as an example) is described by a group of performance curves, and the change relations of the head, power, efficiency and flow of the water pump are described under a certain rotating speed of a water pump motor. It reflects the change rule of the basic performance of the water pump and can be used as the basis for selecting and using the pump. The characteristic curves of various types of water pumps are different, but have a common change trend, as shown in figure 1. Wherein, (1) the characteristic (characteristic) curve of the water pump is provided by a water pump plant under a certain power frequency (such as 50 Hz), and the characteristic curve translates along with the change of the frequency. (2) And (4) a pipe network device curve is established through testing after installation. (3) The operating condition point of the water pump refers to the flow Q, the lift H and the output power P of the motor at a certain instant of the operation of the water pump 2 Efficiency eta p And when the working conditions are equal, the factor for determining the operating condition point of the water pump is the intersection point of a water pump performance curve and a pipeline device system characteristic curve (representing pipe resistance). (4) The efficiency curve of the water pump, provided by the water pump plant, changes with the frequency. (5) And the power curve of the water pump shaft and the power of the water pump shaft represent the input power of the water pump or the output power of the motor.
Fig. 2 shows the established operating model of the water pump working condition. Wherein, (1) the high-efficient operating mode region of water pump is according to efficiency curve and the characteristic curve and the appointed efficiency interval of water pump along with frequency variation and is decided: determining a flow range in an area formed by reducing 5% -10% of the design efficiency of the water pump as a base point; and a fan-shaped area is formed by the flow range corresponding to the efficiency curve according to the characteristic curve of the water pump changing along with the frequency. The division of the efficient operation working condition area of the water pump is a conventional technology in the technical field of water pump systems, and the invention is not specifically explained. (2) The characteristic curve of the water pump which translates along with the change of the frequency is combined with the change of the efficiency curve along with the frequency to form a high-efficiency fan-shaped working condition area of the water pump. (3) The water pump is in a non-efficient operation condition area.
Because the traditional design method is used for leading the water pump to mostly operate in a non-high-efficiency working condition area, the invention considers that the operation efficiency of the water pump is judged, evaluated and optimized according to the current operation working condition point of the water pump, and leads the water pump system to operate in the high-efficiency operation working condition area under the condition of meeting the water supply requirement (outlet pressure or flow of a main pipe) by methods of frequency modulation, parallel connection of a plurality of water pumps and the like.
The general water pump and the motor are combined in a matching way and both have a power consumption curve and an efficiency curve. In a conventional water pump manual, power consumption refers to shaft power or motor output power, and efficiency values include water pump efficiency. Efficiency η of water pump p The water pump gives energy P to the liquid (water) H And input pump shaft (power) energy P 2 The relationship between them, expressed as:
wherein ρ is a liquid density (kg/m) 3 ) (ii) a g is gravity acceleration (m/s) 2 ) (ii) a Q is the flow (m) 3 H); h is the head (m). In this embodiment, the liquid flowing through the water pump is water, and assuming that the temperature is 20 ℃, there are:
P H ＝2.72×Q×H；
the motor draws active power from the power supply, called motor input power, by P 1 And (4) showing. The mechanical power output from the motor shaft, referred to as the motor output power, also called shaft power, is represented by P 2 And (4) showing. Efficiency η of the electrical machine m I.e. the relation between input and output power is:
wherein the efficiency η of the machine m The internal losses of the motor are quantified, among other things, by winding losses, core losses and mechanical losses.
The input power calculation formula of the motor is as follows:
wherein, U is the motor line voltage, constant, I is the line current, cos phi is the power factor, is the motor design parameter, constant.
Thus, the input pump shaft power is:
P 2 ＝(2.72×Q×H)/η p
rated parameters cos phi and line voltage U and efficiency eta are designed through a motor m Power P of water pump 2 Establishing flow Q and motor input power P 1 And the corresponding relation of the line current I, the working current I of the water pump motor, the flow Q, the lift H and the efficiency eta p The following functional relation model is established:
wherein I is the working current of the water pump motor, U is the working voltage of the water pump motor, Q is the flow of the water pump, H is the lift of the water pump, cos phi is the power factor of the water pump motor, eta is m Efficiency of the water pump motor, eta p Is the efficiency of the water pump.
The flow and inlet and outlet pressure of the water pump and the working current, voltage and frequency of a water pump motor are acquired by a sensor with an internet of things communication module and uploaded in real time. Specifically, the method comprises the following steps:
digital sensors for collecting flow and digital sensors for collecting inlet and outlet pressure are arranged on the water pump equipment and the main pipe device, the flow and the inlet and outlet pressure of the water pump are collected in real time respectively, and collected data are uploaded to the Internet of things water pump application cloud platform through the 4G (or WiFi) communication module(ii) a The sensor that will be used for gathering the operating current of water pump motor respectively, voltage and frequency sets up in water pump motor department, gather corresponding data respectively in real time, or directly from PLC, the operating current of water pump motor is read in converter and the switch board, voltage and frequency data, and upload the data of gathering or reading to thing networking water pump through 4G (or wiFi) communication module and use the cloud platform, or obtain data through rs485, upload to thing networking water pump and use the cloud platform through 4G (or wiFi), can use the cloud platform by thing networking water pump in this step 2, according to the data conversion that uploads obtains the lift H that the water pump is currently operated, flow Q, efficiency eta p And obtaining the current operating condition point of the water pump, which is easy to understand by operation and maintenance personnel of the water pump system, so as to further judge whether the water pump operates efficiently at present more intuitively.
And 3, if the current operating condition point of the water pump is not in the efficient operating condition area, optimizing the optimal operating condition point in the efficient operating condition area by adopting a maximum possibility estimation algorithm on the basis of a functional relation model of the motor current related to the pump lift, flow and efficiency, aiming at maximizing the reduction amount of the motor current and taking the actual working requirements of the pump lift, flow and efficiency as conditions.
If the current operating condition point of the water pump is not in the efficient operating condition area, the operating condition of the water pump is necessary to be adjusted to the efficient operating condition area, so that the optimal operating condition point is optimized in the efficient operating condition area on the basis of the functional relation model of the motor current related to the pump lift, the flow and the efficiency, which is established in the step 1, by taking the reduction of the motor current as the target and taking the actual operating requirements of the pump lift, the flow and the efficiency as conditions.
The optimal working condition point obtained by optimizing in the efficient operation working condition area is equivalent to moving the working condition point from the non-efficient operation working condition area to the efficient operation working condition area relative to the current operation working condition point of the water pump, as shown in fig. 5, so that the following variable quantity functional relation can be further obtained by a functional relation model of the motor current related to the lift, flow and efficiency of the water pump:
△I＝f(△Q，△H，△η p )。
the actual working requirements of the pump head, flow and efficiency refer to the variation (Δ Q, Δ H, Δ η, respectively) of the flow, the pump head and/or the efficiency p ) In the preset range corresponding to the current application scene (such as season, design of a plurality of pump systems). Such as: under the condition that the flow is unchanged (delta Q = 0), water pumps are adopted to run in parallel according to the configuration of a pump system, the output power of a motor of the water pumps is adjusted through frequency modulation (frequency reduction), and the total power consumption is reduced. If the actual operating requirements are not taken into account,
the operating point of the water pump represents the operation optimization of the water pump system in the high-efficiency operating area, and energy conservation is one aspect of the operation optimization of the water pump system. Therefore, the energy consumption is taken as an optimization target for the operation optimization of the water pump, and the working current of the motor is reduced by more than 0 as much as possible under the precondition that the actual working requirements of the pump lift, flow and efficiency are met, and the reduction is maximized. As shown in FIG. 4, in order to achieve Δ I >0, the operating point is first translated from FIG. 4- (1) to FIG. 4- (2); the operation optimization takes energy saving as the first priority, namely, the operating point is shifted from fig. 4- (2) to fig. 4- (3) to achieve the minimization.
The invention is not specifically described, but only a more popular example is used to explain the application of the MLE to the optimal operating point of the invention:
(1) As shown in fig. 5, the current corresponding to the current operating point of the water pump is used as an assumed target function result (1);
(2) Assuming an objective function, and taking the result as an input variable for determining an application scenario and a pump system (2), adjusting the flow and the lift according to the current application scenario (such as season) and the pump system (such as the design of a plurality of pumps);
(3) Inputting the parameters into a water pump expert system to calculate an objective function (3);
(4) The result and the operation parameters are fed back to the starting end (4);
(5) Subtracting the current parameter (optimized) causing the input current to change from the assumed objective function current, if the result is less than 0, replacing the assumed objective function result with the optimized overcurrent parameter, and repeating the step (2);
(6) The convergence result is determined by setting the Iteration count (Iteration) or by the amount of the decreasing difference. And calculating a new working condition point according to the current parameter after the convergence result, and displaying the new working condition point in a visual working condition area (6).
And (3) verifying the optimized operation effect:
data collected from the water pump over the past year is obtained from the database, assuming a data collection frequency of once per minute. The accumulated data will produce 525,600 operating points in the water pump operating region, including both the high efficiency and non-high efficiency regions. According to the design of the traditional pump station system, at least 70% of working condition points (367,920 points) are in a non-efficient operation working condition area, as shown in fig. 3. Because the calculated operating points are displayed on the computer page, each operating point corresponds to its original collected data. Software operation can make the mouse once select partial or all working condition points in the non-high-efficiency working area, drag the mouse into the high-efficiency working area according to the method, then calculate the delta I corresponding to each working condition point, and accumulate the current reduction of all dragged working points
Namely, the method saves the power consumption by optimizing the operation of the working condition of the water pump, and finally saves the power consumption
And displaying to achieve the purpose of data visualization. If the operation data of the pump system in the past year shows the water taking and supplying conditions all the year round, the visual result has practical significance and representativeness.
Example 2
The embodiment provides a water pump visualization optimal operation control device based on the internet of things, which is an embodiment of a device corresponding to the water pump visualization optimal operation control method based on the internet of things described in embodiment 1, and mainly includes:
the system comprises a working condition coordinate system and motor current functional relation pre-establishing module, and is used for: establishing a water pump working condition operation model comprising a high-efficiency operation working condition area and a non-high-efficiency operation working condition area according to the type of the water pump; establishing a functional relation model of the motor current of the water pump related to the lift, flow and efficiency of the water pump;
a current operating condition point determination module to: the method comprises the steps of collecting the flow Q and the inlet and outlet pressure of a water pump and the working current, voltage and frequency of a water pump motor in real time, calculating the lift H of the water pump according to the inlet and outlet pressure, and calculating the output power P of the water pump motor according to the working current and voltage of the water pump motor 2 According to the flow Q and the lift H of the water pump and the output power P of the water pump motor 2 Calculating efficiency eta of water pump p (ii) a Adding a current operating condition point of the water pump consisting of the lift H and the flow Q into a water pump operating condition operating model;
an optimal operating point optimizing module for: if the current operating condition point of the water pump is not in the high-efficiency operating condition area, optimizing the optimal operating condition point in the high-efficiency operating condition area by taking the actual working requirements of the pump lift, the flow and the efficiency of the water pump as conditions and taking the reduced quantity of the motor current as a target based on a functional relation model of the motor current relative to the pump lift, the flow and the efficiency of the water pump;
a parameter adjustment module to: according to the optimal working condition point obtained by optimization, the flow Q ', the lift H' and the efficiency eta of the water pump are corresponding p And', adjusting the operation parameters of the water pump and calculating the variation of the current of the motor.
The specific working principle of each module in the water pump visual optimized operation control device is referred to the description of each corresponding step in the water pump visual optimized operation control method.
Example 3
The embodiment provides an electronic device, comprising a processor and a memory; wherein: the memory is to store computer instructions; the processor is configured to execute the computer instructions stored in the memory, and specifically, to execute the water pump visualization optimization operation control method according to embodiment 1.
Example 4
The embodiment provides a water pump visualization optimization operation control system based on the internet of things, which comprises a plurality of sensors of the internet of things, a display and the equipment in the embodiment 3; the sensor of the internet of things is used for acquiring the flow Q and the inlet and outlet pressure of the water pump and the working current, voltage and frequency of a water pump motor in real time and uploading the working current, voltage and frequency to the equipment; the display is used for displaying the variation of the motor current calculated by the equipment.
Example 5
The present embodiment provides a computer medium for storing a program, wherein when the program is executed, the program is used to implement the water pump visualization optimization operation control method described in embodiment 1 above.
The above embodiments are preferred embodiments of the present application, and those skilled in the art can make various changes or modifications without departing from the general concept of the present application, and such changes or modifications should fall within the scope of the claims of the present application.
Claims (9)
1. A water pump visualization optimization operation control method based on the Internet of things is characterized by comprising the following steps:
establishing a water pump working condition operation model comprising a high-efficiency operation working condition area and a non-high-efficiency operation working condition area according to the type of the water pump; establishing a functional relation model of the motor current of the water pump related to the lift, flow and efficiency of the water pump;
the method comprises the steps of collecting the flow Q and the inlet and outlet pressure of a water pump and the working current, voltage and frequency of a water pump motor in real time, calculating the lift H of the water pump according to the inlet and outlet pressure, and calculating the output power P of the water pump motor according to the working current and voltage of the water pump motor 2 According to the flow Q and the lift H of the water pump and the output power P of the water pump motor 2 Calculating efficiency eta of water pump p (ii) a Adding a current operating condition point of the water pump consisting of the lift H and the flow Q into a water pump operating condition operating model;
if the current operating condition point of the water pump is not in the high-efficiency operating condition area, optimizing the optimal operating condition point in the high-efficiency operating condition area by taking the actual working requirements of the pump lift, the flow and the efficiency of the water pump as conditions and taking the reduced quantity of the motor current as a target based on a functional relation model of the motor current relative to the pump lift, the flow and the efficiency of the water pump;
according to the optimal working condition point obtained by optimization, the flow Q ', the lift H' and the efficiency eta of the water pump are corresponding p And', adjusting the operation parameters of the water pump, and calculating and displaying the variation of the current of the motor.
2. The water pump visualization optimization operation control method based on the Internet of things according to claim 1, wherein the actual working requirements of the pump lift, the flow and the efficiency mean that the variation of the flow, the pump lift and/or the efficiency is within a preset range.
3. The water pump visualization optimization operation control method based on the Internet of things of claim 1, wherein the flow and inlet and outlet pressure of the water pump, and the working current, voltage and frequency of a water pump motor are acquired by a sensor with an Internet of things communication module and uploaded in real time.
4. The water pump visualization optimization operation control method based on the internet of things of claim 1, wherein a functional relation model of the motor current of the water pump with respect to the pump head, the flow and the efficiency is represented as:
wherein I is the working current of the water pump motor, U is the working voltage of the water pump motor, Q is the flow of the water pump, H is the lift of the water pump, cos phi is the power factor of the water pump motor, eta is m Efficiency of the water pump motor, eta p Is the efficiency of the water pump.
5. The water pump visualization optimization operation control method based on the Internet of things according to claim 1, wherein the optimal working condition point is optimized by adopting a maximum likelihood estimation algorithm.
6. The utility model provides a visual operation controlling means that optimizes of water pump based on thing networking which characterized in that includes:
the system comprises a working condition coordinate system and motor current functional relation pre-establishing module, and is used for: establishing a water pump working condition operation model comprising a high-efficiency operation working condition area and a non-high-efficiency operation working condition area according to the type of the water pump; establishing a functional relation model of the motor current of the water pump related to the lift, flow and efficiency of the water pump;
a current operating condition point determination module to: the method comprises the steps of collecting the flow Q and the inlet and outlet pressure of a water pump and the working current, voltage and frequency of a water pump motor in real time, calculating the lift H of the water pump according to the inlet and outlet pressure, and calculating the output power P of the water pump motor according to the working current and voltage of the water pump motor 2 According to the flow Q and the lift H of the water pump and the output power P of the water pump motor 2 Calculating efficiency eta of water pump p (ii) a Adding a current operating condition point of the water pump consisting of the lift H and the flow Q into a water pump operating condition operating model;
an optimal operating point optimizing module to: if the current operating condition point of the water pump is not in the high-efficiency operating condition area, optimizing the optimal operating condition point in the high-efficiency operating condition area by taking the actual working requirements of the pump lift, the flow and the efficiency of the water pump as conditions and taking the reduced quantity of the motor current as a target based on a functional relation model of the motor current relative to the pump lift, the flow and the efficiency of the water pump;
a parameter adjustment module to: according to the optimal working condition point obtained by optimization, the flow Q ', the lift H' and the efficiency eta of the water pump are corresponding p And', adjusting the operation parameters of the water pump and calculating the variation of the current of the motor.
7. An electronic device comprising a memory and a processor, the memory having stored therein a computer program, wherein the computer program, when executed by the processor, causes the processor to carry out the method according to any one of claims 1 to 5.
8. An Internet of things-based water pump visualization optimization operation control system is characterized by comprising a plurality of Internet of things sensors, a display and the equipment of claim 7; the sensor of the Internet of things is used for acquiring the flow Q and the inlet and outlet pressure of the water pump and the working current, voltage and frequency of a water pump motor in real time and uploading the working current, voltage and frequency to the equipment; the display is used for displaying the variation of the motor current calculated by the equipment.
9. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
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| CN115293514B (en) * | 2022-07-08 | 2023-05-12 | 深圳市前海能源科技发展有限公司 | Regional energy supply control method, system and storage medium |
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