CN117215269A - Pump station APC control system - Google Patents
Pump station APC control system Download PDFInfo
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- CN117215269A CN117215269A CN202311249457.1A CN202311249457A CN117215269A CN 117215269 A CN117215269 A CN 117215269A CN 202311249457 A CN202311249457 A CN 202311249457A CN 117215269 A CN117215269 A CN 117215269A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000005457 optimization Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000003860 storage Methods 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000012552 review Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to a pump station APC control system, which comprises a pump station PLC control subsystem, a pump station APC platform, a pipe network SCADA subsystem and an HMI industrial control platform, wherein the pump station PLC control subsystem, the HMI industrial control platform and the pump station APC platform are connected through a pump station local area network, the pipe network SCADA subsystem is connected with the pump station local area network through a switch, and the pump station APC platform respectively performs integrated optimization control on a pump station and a pipe network after acquiring pump station operation conditions and company scheduling data from the pump station PLC control subsystem and the pipe network SCADA subsystem. Compared with the prior art, the invention improves the stability and disturbance rejection capability of the pump station control, and can better realize the safe and efficient automatic control of water supply of the pump station and pipe network combined system.
Description
Technical Field
The invention belongs to the technical field of industrial control, and particularly relates to an APC control system of a pump station.
Background
The basic facilities of urban water supply and distribution are a pump station and a pipe network, wherein the pump station and the pipe network are key assets of water supply, account for about 70% of the investment of the whole water service, are large households of water supply energy consumption, and account for about more than 60% of the total energy consumption of water supply; meanwhile, the pump station and the pipe network are short plates which are most easily threatened by weather, external force, pipe explosion and other security threats, and the important monitoring and protection are necessary, so that the pump station and the pipe network are definitely two key elements for urban security and stability water supply. PID (proportional, integral, derivative) control, as a commonly used control algorithm, can be used to implement water supply delivery control, however, it also has some drawbacks: firstly, proportional coefficient, integral time and differential time are required to be reasonably set in PID control so as to achieve a better control effect. However, due to complex dynamic characteristics of the system and changes of actual working conditions, a large number of tests and adjustment are often needed to obtain the optimal parameters, and the parameter adjustment process is complicated; secondly, the PID control is sensitive to parameter variation of the system, and when nonlinear, time-varying or unknown disturbance occurs to a controlled object, the PID control can not be well adapted and regulated, so that the control performance is reduced; again, the stability of the PID control depends on the choice of parameters, and if the parameters are not chosen properly or the system dynamics are complex, the PID control may oscillate, be less stable or be unstable. Therefore, in the face of the trend of large and complicated modern urban water supply process, the traditional PID control is insufficient, and a novel pump station control system is required to be designed, so that the stability and disturbance rejection capability of pump station control are improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the pump station APC control system which improves the stability and disturbance rejection of pump station control.
The aim of the invention can be achieved by the following technical scheme:
the invention provides a pump station APC control system, which comprises a pump station PLC control subsystem, a pump station APC platform, a pipe network SCADA subsystem and an HMI industrial control platform, wherein the pump station PLC control subsystem, the HMI industrial control platform and the pump station APC platform are connected through a pump station local area network, the pipe network SCADA subsystem is connected with the pump station local area network through a switch, and the pump station APC platform respectively performs integrated optimization control on a pump station and a pipe network after acquiring pump station operation conditions and company scheduling data from the pump station PLC control subsystem and the pipe network SCADA subsystem.
Further, the pump station APC platform adopts MPC to integrate and optimally control the pump station and the pipe network, and the concrete process is as follows:
acquiring real-time parameters, wherein the real-time parameters comprise pump station association pressure measurement point pressure, pump station association point flow, pump operation combination condition and pump station reservoir water storage condition;
calculating and optimizing the real-time parameters through a prediction model;
and sending the optimized parameters to a pump station PLC control subsystem and a pipe network SCADA subsystem, and adjusting the pump assembly operation proportion, the water outlet pressure setting, the pump station water outlet flow setting and the reservoir water storage setting.
Further, the prediction model comprises an engine pump combination equivalent model and a pipe network flow balance model.
Further, the predictive model is constrained by pump station load capacity and pipe network water supply load demand.
Further, the predictive model is corrected using a least squares method.
Further, the pipe network SCADA subsystem comprises a lower computer and an upper computer which are connected through an industrial communication network.
Further, the industrial communication network and the pumping station local area network configure backup and redundant devices.
Further, the lower computer comprises a data acquisition module and a monitoring module.
Further, the pump station PLC control subsystem comprises a central processing unit, an input part and an output part, and the pump station PLC control subsystem is connected through a bus.
Further, the HMI industrial control platform and the pump station APC platform are installed on the same computer hardware.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention sets up the pump station APC platform, link with PLC control subsystem of the pump station, pipe network SCADA subsystem and HMI industrial control platform, use the way that the existing control system is data source and control output, use APC to optimize the process control to integrate and optimize the pump station and its associated pipe network, have improved stability and anti-interference ability of pump station control, overcome control difficulties such as the big lag of the system, strong coupling, multi-interference, etc., have friendly man-machine interface, can realize pump station and pipe network combination system safe and high-efficient water supply automatic control better.
2. The invention supports the MPC with multiple inputs and outputs and constrained model prediction control, can optimize control parameters through the prediction model, including a pump station combination equivalent model and a pipe network flow balance model, and uses a least square method to correct the prediction model, thereby realizing high-quality and high-stability multivariable control.
3. The industrial communication network and the pump station local area network are provided with backup and redundant equipment, so that the reliability of the system is improved.
4. The pump station APC platform and the HMI industrial control platform are installed on the same computer hardware, and the control scheme is embedded into the existing operation interface, so that the pump station APC platform and the HMI industrial control platform are easy to accept by operators, and meanwhile, the pump station APC platform and the HMI industrial control platform are convenient to debug.
Drawings
Figure 1 is a schematic diagram of the structure of the present invention,
the system comprises an HMI industrial control platform, a pump station APC platform, a pump station PLC control subsystem, a pipe network SCADA subsystem, a pump station local area network, a switch and a power supply, wherein the HMI industrial control platform, the pump station APC platform, the pump station PLC control subsystem, the pipe network SCADA subsystem, the pump station local area network and the power supply are respectively arranged in sequence, and the HMI industrial control platform, the pump station APC platform, the pump station PLC control subsystem, the pipe network SCADA subsystem, the pump station local area network;
FIG. 2 is a block diagram of the data flow of pump station APC;
FIG. 3 is a schematic diagram of a pump station APC advanced process control scheme;
figure 4 is a schematic diagram of the architecture of the SCADA subsystem of the pipe network,
401, a lower computer, 402, an upper computer, 403, an industrial communication network, 411, a data acquisition module, 421 and a monitoring module;
figure 5 is a schematic diagram of the pump station PLC control subsystem,
301, a central processing unit (cpu), 302, an input part, 303 and an output part.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following examples.
Examples:
the embodiment provides a pump station APC control system, as shown in FIG. 1, including pump station PLC control subsystem 3, pump station APC platform 2, pipe network SCADA subsystem 4 and HMI industrial control platform 1, pump station PLC control subsystem 3, HMI industrial control platform 1 and pump station APC platform 2 link to each other through pump station LAN 5, pipe network SCADA subsystem 4 pass through switch 6 with pump station LAN 5 links to each other, and pump station APC platform 2 obtains pump station operating condition and company dispatch data from pump station PLC control subsystem 3 and pipe network SCADA subsystem 4 respectively after, integrates the optimization control to pump station and pipe network to current control system is the route of data source and control output, has fully utilized current control system's latent energy, promotes the control level.
In a preferred embodiment, the HMI industrial control platform 1 and the pump station APC platform 2 are installed on the same computer hardware, and the control scheme is embedded into the existing operation interface, so that the HMI industrial control platform is easy to accept by operators and is also convenient to debug. The pump station APC control platform 2 can communicate with configuration software such as FactoryTalk View SE, AVEVA System Platform, kingSCADA and the like through OPC, so that the pump station APC control platform can share a flow chart and an alarm interface with the configuration software of the HMI industrial control platform 1, and an operator can be connected between the HMI industrial control platform 1 and the APC platform 2 in a seamless manner; meanwhile, the current running condition is accurately tracked through second-level monitoring and statistics.
As shown in fig. 4, the pipe network SCADA subsystem 4 includes a lower computer 401 and an upper computer 402, which are connected through an industrial communication network 403, where the lower computer 401 includes a data acquisition module 411 and a monitoring module 421, where the data acquisition module is typically a PLC, and converts an equipment operation state, such as pump station related pressure measurement point, into an electrical signal through a sensor; the monitoring module 421 is generally an RTU, and can realize a monitoring function of the distributed PLC through remote information transmission; the upper computer 402 generally has a friendly man-machine interface, and is mainly used for acquiring the operation state of the monitoring device, and when the device has a problem, the state (such as normal, alarm, fault, etc.) among the devices can be displayed on the upper computer, and a control instruction is issued to the lower computer. In a preferred embodiment, the industrial communication network 403 and the pump station local area network 5 are each configured with backup and redundant devices to further increase the reliability of the system.
As shown in fig. 5, the pump station PLC control subsystem 3 includes a central processing unit 301, an input portion 302, and an output portion 303, which are connected by a bus, wherein the input portion 302 is used for collecting and storing data and information of actual operation of the pump station; the central processor 301 makes a reflection according to the actual action requirement of the controlled object based on the information acquired from the input section 302; the output section 303 issues a control command to the device to adjust the state of operation of the device in real time. The pump station APC platform 2 data is acquired from a company production management database and a pump station management station database, and the instruction is received from a company scheduling layer or a pump station management station monitoring center.
The data flow block diagram of the pump station APC platform 2 is shown in figure 2, the pump station PLC control subsystem 3 acquires the pump station operation conditions through sensors, including the pump operation combination condition (the pump start-stop combination and the equipment operation condition), the pump station reservoir water storage condition and the water quality condition, and sends the pump station operation conditions to the pump station APC platform through an industrial control network; the pipe network SCADA subsystem 4 acquires company scheduling data through sensors, wherein the company scheduling data comprises pump station association pressure measurement point pressure, pump station association point flow monitoring values, preset water supply modes and company scheduling instructions, monitors a plurality of pipe network parameters in real time and transmits the pipe network parameters to the pump station APC platform through a data link.
The pump station APC platform 2 is controlled by MPC (model predictive control), and the main aim is to quickly match the pipe network flow load change requirement on the premise of ensuring the water supply efficiency of the pump, so as to realize the steady-state operation and the economic operation of the pump station. The specific process is as shown in fig. 3: the whole control process is divided into an instruction layer, a calculation layer, a control layer and an execution layer, and comprises the following steps:
and the instruction layer issues a system target, and simultaneously calculates and optimizes the acquired real-time parameters including pump station association pressure measurement point pressure, pump station association point flow, pump operation combination condition and pump station reservoir water storage condition through a calculation performance module in the calculation layer.
Specifically, real-time parameters are calculated and optimized through a prediction model, and constraint in two aspects needs to be considered for the prediction model, namely the load capacity of a pump station; and secondly, the load demand of pipe network water supply. The prediction model has four inputs and four outputs, four control targets are respectively the pressure of the associated measuring point, the flow of the associated measuring point, the operation combination condition of the pump and the reservoir water level of the pump station, four control means are respectively the operation proportion of the pump, the setting of the water outlet pressure of the pump station, the setting of the water outlet flow of the pump station and the setting of the reservoir water storage, and the control method combining expert rules and nonlinear control is adopted to simultaneously adjust according to the load change of the pump station, so that the water supply on the basis of the efficiency of the pump station is ensured to match the load requirement, and the multivariable control on the operation of the pump station is realized in the control layer. The pump combination operates the proportion, the water pressure is presumed and obtains the optimum quantity under the current load through the goal optimization, accept the manual regulation quantity at the same time, the comprehensive result is used for controlling and outputting.
And issuing the optimized parameters to a pump station PLC control subsystem 3 and a pipe network SCADA subsystem 4 in an execution layer, so as to realize the control of equipment.
Specifically, the prediction model comprises an engine pump combination equivalent model and a pipe network flow balance model:
(1) Pump combination equivalent model
For example, a square pump station (people park) for water supply in a sea city comprises 4 pumps, 2 reservoir pumps, 1 reservoir pipeline dual-purpose pump and 1 pipeline pump; the pump station of the review park comprises 4 pumps, 2 reservoirs and 2 pipelines.
In this way, the operation of the pump station can be optimized by adopting a water pump equivalent model method, so that the purposes of stabilizing the water supply of the pump station and reducing the consumption are achieved, the operation modes of the pump station are required to be optimally combined, and especially, the pump station which is not equipped with a variable frequency pump and is not suitable for being equipped with a similar square pump station and a review park pump station is formed into an equivalent combined operation, namely a so-called virtual water pump model through reasonable optimization and collocation of the big pump and the small pump;
(2) Pipe network flow balance model
The pump station is an intermediate link of the whole water supply system, the upstream is connected with a water plant, the downstream is connected with a pipe network, and the pump station APC can acquire data of related measuring points from a water supply system data platform and optimize a pump station water supply mode according to water supply requirements. Therefore, the pipe network flow balance model can be cooperatively developed by combining the existing pipe network modeling of the company and the intelligent water plant project of the south factory to be developed.
In a preferred embodiment, the predictive model is calibrated using least squares to improve control performance and adaptability of the MPC to achieve high quality, highly stable multivariable control.
The system communication interface can adopt communication protocols such as OPC, MODBUS and the like, and can also customize the communication protocols. The OPC protocol uses a standard-based interface, can flexibly define rules of data acquisition and exchange, and supports functions of real-time data transmission, historical data reading, remote control and the like; the MODBUS protocol can communicate through different physical media, such as serial ports, ethernet, etc., and can also be extended to larger network environments, supporting a master-slave structure and a multi-master structure.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a pump station APC control system, its characterized in that includes pump station PLC control subsystem (3), pump station APC platform (2), pipe network SCADA subsystem (4) and HMI industry control platform (1), pump station PLC control subsystem (3), HMI industry control platform (1) and pump station APC platform (2) link to each other through pump station LAN (5), pipe network SCADA subsystem (4) through switch (6) with pump station LAN (5) link to each other, pump station APC platform (2) are respectively from pump station PLC control subsystem (3) and pipe network SCADA subsystem (4) after obtaining pump station operating condition and company's dispatch data, integrate the optimization control to pump station and pipe network.
2. The pump station APC control system according to claim 1, wherein the pump station APC platform adopts MPC to integrate and optimally control the pump station and the pipe network, and the concrete process is as follows:
acquiring real-time parameters, wherein the real-time parameters comprise pump station association pressure measurement point pressure, pump station association point flow, pump operation combination condition and pump station reservoir water storage condition;
calculating and optimizing the real-time parameters through a prediction model;
and sending the optimized parameters to a pump station PLC control subsystem and a pipe network SCADA subsystem, and adjusting the pump assembly operation proportion, the water outlet pressure setting, the pump station water outlet flow setting and the reservoir water storage setting.
3. A pump station APC control system according to claim 2, wherein said predictive model comprises a pump-combined equivalent model and a pipe network flow balance model.
4. A pump station APC control system according to claim 2, wherein said predictive model is constrained by pump station load capacity and pipe network water supply load requirements.
5. A pump station APC control system according to claim 2, wherein said predictive model is corrected using a least squares method.
6. The pump station APC control system according to claim 1, wherein said pipe network SCADA subsystem (4) comprises a lower computer (401) and an upper computer (402) connected by an industrial communication network (403).
7. A pump station APC control system according to claim 6, characterized in that said industrial communication network (403) and pump station local area network (5) are configured with backup and redundant devices.
8. A pump station APC control system according to claim 6, characterized in that said lower computer (401) comprises a data acquisition module (411) and a monitoring module (421).
9. A pump station APC control system according to claim 1, characterized in that said pump station PLC control subsystem (3) comprises a central processor (301), an input section (302) and an output section (303) connected by a bus.
10. A pump station APC control system according to claim 1, characterized in that said HMI industrial control platform (1) and said pump station APC platform (2) are installed on the same computer hardware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311249457.1A CN117215269A (en) | 2023-09-26 | 2023-09-26 | Pump station APC control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311249457.1A CN117215269A (en) | 2023-09-26 | 2023-09-26 | Pump station APC control system |
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| CN117215269A true CN117215269A (en) | 2023-12-12 |
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| CN202311249457.1A Pending CN117215269A (en) | 2023-09-26 | 2023-09-26 | Pump station APC control system |
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- 2023-09-26 CN CN202311249457.1A patent/CN117215269A/en active Pending
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