CN115510595A - Method for establishing and applying online hydraulic model of water supply pipe network of high-speed railway station - Google Patents
Method for establishing and applying online hydraulic model of water supply pipe network of high-speed railway station Download PDFInfo
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Abstract
A method for establishing and applying an online hydraulic model of a water supply pipe network of a high-speed railway station belongs to the technical field of water supply systems and comprises the following steps: s1: collecting and sorting basic attribute data of a water supply pipe network of a high-speed rail station; s2: establishing a water supply network topological structure model through EPANET pipe network modeling software according to the basic attribute data in the S1; s3: carrying out parameter assignment on each component of the topological structure model, and manually checking whether the topological structure and the valve state of the model are correct or not; s4: the model is checked on line, model parameters are corrected and adjusted in a self-adaptive mode, and whether the model meets the use requirements or not is judged through data checking of on-line monitoring points; s5: the application model analyzes the current operation situation of the pipe network, guides the operation scheduling of the water supply system, further optimizes the scheduling scientifically and reasonably, and controls and processes emergency accidents. The method carries out on-line hydraulic simulation on the scheduling control target, provides guidance for the operation scheduling of the water supply system, and realizes the scientization and modernization of the operation of the water supply system of the high-speed rail station.
Description
Technical Field
The invention belongs to the technical field of water supply systems, and particularly relates to a method for establishing and applying an online hydraulic model of a water supply network of a high-speed rail station.
Background
The water supply system of the high-speed rail station mainly comprises train water supply, station fire-fighting water, station water and the like, and consists of a pump room, a passenger train water supply plug, a fire hydrant and the like, and normal water supply and dispatching management of the high-speed rail station influence the train water supply safety of the high-speed rail motor train unit and the normal travel of passengers.
At present, most of water supply systems of high-speed railway stations are unattended, scheduling is carried out according to experience, and intelligent operation and maintenance management is not paid attention. The method is characterized in that an online hydraulic model is built for reflecting the hydraulic state of a water supply network of a high-speed railway station in real time, the model is a basis for carrying out intelligent management on the water supply network by using a computer technology, and is used for monitoring the pressure and flow data of key nodes in real time for an online monitoring system on the basis of a pipe network GIS (geographic information system), and carrying out simulation on dynamic parameters such as the pressure of water, the flow rate of water and the like in the water supply network of the high-speed railway station through steady-state hydraulic simulation calculation.
In the prior art, for example, publication number CN111077864a, entitled intelligent drainage scheduling and analyzing method and system, drainage monitoring management and scheduling analysis are performed based on a drainage network hydraulic model, so as to realize correlation between various types of monitoring data of drainage. However, the drainage pipe network hydraulic model is established based on design drawings of various industrial control facilities and information such as relevant basic data, the scheduling mode training is set to be fixed in sunny days, rainy days and the like, and the dynamic monitoring and adjusting adaptability is poor. The model in the analysis method is not an online hydraulic model, hydraulic simulation and check are not performed synchronously, the set scheduling strategy is an offline scheme library, and the timeliness is poor.
Disclosure of Invention
Aiming at the technical problems, the invention provides an establishing and applying method of an online hydraulic model of a water supply network of a high-speed rail station, which is used for performing online hydraulic simulation on a scheduling control target, providing guidance for operation scheduling of a water supply system and realizing scientization and modernization of operation of the water supply system of the high-speed rail station.
The invention adopts the following specific technical scheme:
a method for establishing and applying an online hydraulic model of a water supply pipe network of a high-speed railway station comprises the following steps:
s1: collecting and sorting basic attribute data of a water supply pipe network of a high-speed rail station;
s2: establishing a water supply network topological structure model through EPANET pipe network modeling software according to the basic attribute data in the S1;
s3: carrying out parameter assignment on each component of the topological structure model, and manually checking whether the topological structure and the valve state of the model are correct or not;
s4: the model is checked on line, model parameters are corrected and adjusted in a self-adaptive mode, and whether the model meets the use requirements or not is judged through data checking of on-line monitoring points;
s5: the application model analyzes the current operation situation of the pipe network, guides the operation scheduling of the water supply system, further optimizes the scheduling scientifically and reasonably, and controls and processes emergency accidents.
Preferably, the basic attribute data includes static attribute data and dynamic attribute data of the water supply system, the static attribute data constitutes a basic topology structure of the model, and the dynamic attribute data controls all time changes and operation processes of the model.
Preferably, the static attribute data comprises static data of a GIS (geographic information System) data, a water source, a water pump, a pipe section and a water utilization node of a pipe network, and is obtained by surveying/managing/collecting a GIS system, a pipe network system diagram and a personnel site.
Preferably, the dynamic attribute data includes data of the change process of pressure, flow, water level, water pump operation and valve state measured from each part of the pipe network, and is acquired by a data acquisition instrument and sensor equipment of the online monitoring system.
Preferably, the main elements of the topology of the model are pipe sections and water usage nodes, which are the microstructures of the actual water supply system.
Preferably, the online model checking method includes:
the hydraulic model and the online monitoring system are butted, actual working condition data are led into the model, model calculation is carried out through iterative real-time data, pipe section flow and water node pressure results calculated by the model are compared with online monitoring data of limited monitoring points, if errors exceed threshold values, reasons are analyzed, model parameters are modified and/or a model structure is checked, and the steps are repeated until the errors are qualified.
Preferably, the online check comprises the following four aspects:
a. checking the pressure of a water consumption node and the water consumption, wherein the water consumption comprises basic water consumption and random water consumption;
b. checking the roughness coefficient or the resistance coefficient of the pipe section;
c. checking a water supply system model, wherein the checking comprises model data information and image information of a water supply system;
d. checking the working characteristic curves of the equipment, such as the working characteristic curves of a valve and a water pump.
Preferably, the standard of the pressure check is that the error between the pressure of the pressure monitoring point with the pressure of more than 80% and the model calculation result is within +/-1.0 m, or the error between the pressure of the pressure monitoring point with the pressure of more than 90% and the model calculation result is within +/-2 m, or the average error between the flow of the monitoring point of the important water pipeline and the model calculation result is within +/-10%.
Preferably, the model application is that corresponding scheduling decisions are made on the opening and closing of the water pump and/or the opening of the valve on a model checked in S4 according to data monitored in real time in a pipe network, whether the scheduling decisions meet the water supply requirements or not is calculated and analyzed in real time, if the requirements are met, the scheduling strategies are considered to be reasonable and effective, actual operation can be issued for scheduling, and the on-site guidance of the on-line hydraulic model is achieved.
Preferably, the analysis of the current running situation in the step S5 mainly comprises the analysis of the rationality of the pipe network arrangement and the analysis of the running condition of a water utilization node; the control processing of the emergency accident firstly utilizes the model calculation result to quickly position the accident site, calculates the optimal valve closing scheme around the accident site to isolate the accident site, and evaluates whether the water supply capacity after closing the corresponding valve meets the water demand of the area outside the accident site.
The invention has the beneficial effects that:
(1) The water supply system of the high-speed rail station has the characteristics of large time-varying change and large water supply quantity change: if the fire hydrant normally operates, the fire hydrant does not need water, and the water consumption of a station is small; when the train is supplied with water, the water consumption is suddenly changed, and the flow change is large. The model integrates static attribute information of a GIS system and dynamic attribute information of an online monitoring system, forecasts, estimates and distributes water consumption, tracks the hydraulic running state of a water supply system of a high-speed rail station on line, calculates hydraulic information such as flow, flow rate and pressure of a pump station and a water consumption node of all pipelines in real time, provides a basis for scientific dispatching, system reconstruction and management of the water supply system of the high-speed rail station, and also provides support for safe water transmission and distribution of a water supply network;
(2) The hydraulic simulation and the check are carried out synchronously on the hydraulic model of the pipe network based on the online hydraulic model of the online monitoring system, so that the working state of the model and the working state of the water supply pipe network are consistent;
(3) Through the calculation of an online pipe network hydraulic model, the operation state of a pipe network after scheduling control can be intuitively known, and the uncertainty of decision depending on experience is avoided; meanwhile, the model calculation result reflects the hydraulic operation state of the whole pipe network, the pressure and flow change of the unmonitored nodes can be visually checked, the operation current situation of the water supply pipe network is analyzed, the weak points of the water supply system are known, and scientific basis is provided for planning management, operation maintenance, reconstruction and expansion, optimized scheduling and the like of the water supply pipe network;
(4) The hydraulic simulation of the water supply pipe network of the high-speed rail station provided by the invention realizes the uninterrupted simulation and monitoring of the pipe network state for 24 hours and provides real-time decision support. The model is in butt joint with an online monitoring system, data assimilation is achieved, full-automatic model verification is achieved, unattended operation is achieved, and workers only need to monitor the operation state of the pipe network at the client side.
Drawings
FIG. 1 is a flow chart of a method for establishing and applying an online hydraulic model of a water supply network of a high-speed railway station;
FIG. 2 is a schematic diagram of an application of an online hydraulic model of a water supply pipe network of a high-speed rail station according to a preferred embodiment of the invention;
fig. 3 is a schematic diagram of an on-line hydraulic model emergency accident of a water supply system of a high-speed rail station according to a preferred embodiment of the invention.
Detailed Description
The invention is further illustrated by the following specific examples. The starting materials and methods employed in the examples of the present invention are those conventionally available in the market and conventionally used in the art, unless otherwise specified.
Example 1
As shown in fig. 1, the embodiment discloses a method for establishing and applying an online hydraulic model of a water supply network of a high-speed railway station, which comprises the following steps:
s1: and collecting and sorting basic attribute data of a water supply network of a high-speed railway station.
Collecting basic attribute data of the pipe network required by modeling, reflecting the data or graphic information by means of investigation or field investigation, measurement and the like according to the actual water supply condition, and preparing for pipe network modeling and hydraulic simulation. The dynamic attribute data control method comprises static attribute data and dynamic attribute data of a water supply system, wherein the static attribute data form a basic topological structure of a model, and the dynamic attribute data control model controls all time changes and operation processes.
The static attribute data comprises GIS data of a pipe network, and static data of water sources, water pumps, pipe sections, water consumption nodes and the like, and is obtained by surveying/managing/collecting a GIS system, a pipe network system diagram and a personnel site. The dynamic attribute data comprises data such as pressure, flow, water level, water pump operation and valve state change process measured from each part of the pipe network, and is acquired by a data acquisition instrument and sensor equipment of the online monitoring system. The details are shown in tables 1 and 2 below.
TABLE 1 Water supply System static Attribute data
| Serial number | Categories | Data item | Source |
| 1 | Node point | Elevation, type | GIS, pipe network system diagram and field survey |
| 2 | Pipe line | Standard pipe diameter, pipe material, length, friction resistance | GIS, pipe network system diagram and field management personnel |
| 3 | Water pump | Flow, lift, rated power, Q-H-eta curve | GIS, pipe network system diagram, field data collection and field |
| 4 | Control valve | Type, caliber | GIS, pipe network system diagram and field management personnel |
| 5 | Water pool | Water level | GIS, on-site data collection |
TABLE 2 Water supply System dynamic Attribute data
S2: according to the basic attribute data in the S1, establishing a water supply pipe network topological structure model through EPANET pipe network modeling software:
static attribute data of the water supply network are led into EPANET to establish a topological structure of a water supply network model of the high-speed rail station, the topological structure of the model is a microstructure of an actual water supply system, and pipe sections and water consumption nodes are main elements forming a microcosmic hydraulic model and reflect the spatial structure and component composition of the actual pipe network. As the water supply system of the high-speed rail station belongs to a small and independent water supply area, in order to truly reflect the operation condition of the water supply system, a large number of topological structures are not suggested to be simplified during modeling.
S3: carrying out parameter assignment on each component of the topological structure model, and manually checking whether the topological structure and the valve state of the model are correct:
and giving corresponding parameters such as actually measured pressure and flow data of the water pump to each component of the model, monitoring node flow data, calculating node flow of the model and giving the node flow of the model. The operation model carries out preliminary analysis and calculation, and manual data inspection is carried out on the basis to check whether the topological structure of the pipe network and the valve state of the pipe network are correct or not, so that the accuracy of the model is ensured.
S4: the model is checked on line, model parameters are adjusted in a self-adaptive correction mode, and whether the model meets the use requirements or not is judged through data checking of online monitoring points:
the hydraulic model is connected with an online monitoring system, actual working condition data are led into the model, model calculation is carried out through iterative real-time data, pipe section flow and water node pressure results calculated by the model are compared with online monitoring data of limited monitoring points, pressure changes of pipe network nodes around the monitoring points are reflected through the pressure monitoring data of the limited monitoring points, and the pressure distribution condition of the whole pipe network is reflected to the greatest extent. And if the error exceeds a threshold value, analyzing the reason, modifying the model parameters and/or checking the model structure, and repeating the steps until the error is qualified. The model checking mainly comprises the following four aspects:
a. checking the pressure of a water consumption node and the water consumption, wherein the water consumption comprises basic water consumption and random water consumption;
b. checking the roughness coefficient or the resistance coefficient of the pipe section;
c. checking a water supply system model, wherein the checking comprises model data information and image information of a water supply system;
d. checking the working characteristic curve of the equipment, such as the working characteristic curve of a valve and a water pump.
The standard of the pressure checking is that the error between the pressure of the pressure monitoring point of more than 80% and the model calculation result is within +/-1.0 m, or the error between the pressure of the pressure monitoring point of more than 90% and the model calculation result is within +/-2 m, or the average error between the flow of the monitoring point of the important water pipeline and the model calculation result is within +/-10%, so that the sudden change of the water delivery quantity and the gradual change characteristic of the water consumption of a user after the pressure pump station of the high-speed rail station is dispatched can be accurately reflected.
S5: the application model analyzes the current operation situation of the pipe network, guides the operation scheduling of the water supply system, further optimizes the scheduling scientifically and reasonably, and controls and processes emergency accidents:
the analysis of the current operation situation mainly comprises the analysis of the rationality of the pipe network arrangement and the analysis of the operation conditions of water using nodes. Through the hydraulic parameters obtained by calculation, whether the arrangement and water supply of certain areas or pipe sections of the high-speed rail station are reasonable or not can be analyzed, simulation calculation is carried out on various possible operation working conditions, the technical and economic performances of various schemes can be compared and evaluated, and therefore the optimal operation scheduling scheme is sought, and the highest social benefit and economic benefit are achieved.
In the actual operation process of the water supply system of the high-speed rail station, the operation state at every moment changes, after the online hydraulic model is checked, the model calculation result reflects the hydraulic operation state of the whole pipe network, the pressure and flow change of the unmonitored nodes can be visually checked, the operation current situation of the water supply network is analyzed, the weak points of the water supply system are known, and scientific basis is provided for planning management, operation maintenance, reconstruction and expansion, optimized scheduling and the like of the water supply network. And performing corresponding water pump state adjustment according to information monitored in real time in a pipe network, performing corresponding scheduling decision on opening and closing of a water pump and/or valve opening on an online model verified in real time, calculating and analyzing whether the scheduling decision meets the water supply requirement or not in real time, and if the scheduling decision meets the requirement, considering that the scheduling strategy is reasonable and effective, issuing practical operation for scheduling, and realizing on-site guidance of the online hydraulic model for scheduling decision.
When an accident occurs in a water supply network, water supply to local areas, particularly high-speed railway stations and trains, cannot be stopped blindly, and the loss caused by the emergency water supply stopping scheme optimized by a hydraulic model is reduced to the minimum. Rapidly positioning to an accident site through calculation of a hydraulic model, checking the positions of valves needing to be closed around, calculating an optimal valve closing scheme, isolating the accident site, stopping water leakage for rush repair, guaranteeing timely water consumption outside the accident site to the maximum extent, and simultaneously rapidly maintaining the accident site; and evaluating whether the water supply capacity of the water supply system after the valve is closed can meet the water use requirement beyond the accident point.
The hydraulic modeling and simulation method for the water supply network of the high-speed rail station can provide a basis for predicting the operation condition of the future pipe network while mastering the operation state of the pipe network, also can provide emergency countermeasures and analyze accident reasons particularly in case of an accident as a main means for reducing the operation investment cost of the pipe network, can improve the management means through modeling, and improves the service level so as to ensure that water is supplied to a train efficiently, safely and with high quality.
Example 2
The pressure of user nodes needs to meet requirements, if the pressure is too high, the energy consumption of a pump station is too high, the water supply pressure is low, and users cannot normally use water, so that water use accidents are caused. The embodiment discloses a model pressure checking target of a preferred embodiment, and the pressure of each node, the flow velocity of each pipe section, the head loss and the like are obtained by performing analog simulation calculation on a water supply network according to a hydraulic model checked by online monitoring data. As a help assistant for operation managers of a water supply system, the water supply system helps to know the operation conditions of all parts except monitoring points in the water supply network in detail, and many problems which are not easy to find at ordinary times are found, such as regions with too low water supply pressure and reasons for the regions.
TABLE 3 calculation of pressure regulation targets
| Category of contrast | Before pressure regulation (m) | After pressure regulation (m) |
| Outlet pressure of pump station | 40 | 36 |
| Pressure of the worst point | 39 | 35 |
And the table 3 is a pump station pressure regulation and control target, the water pressure of the current system is too high, the rotating speed ratio of the water pump is regulated to reduce the energy consumption of the pump station, the outlet pressure of the water pump is reduced, and the water pressure requirement of the worst point is met. After the water supply pressure of the pump station is adjusted through online hydraulic model display, the change of the water supply quantity of the whole water supply network and the pressure of each pressure monitoring point of the pipe network enables a dispatcher to very intuitively know the node pressure condition outside a non-monitoring point and the flow state of a pipe section, so that the balance and reasonable pressure control of the water supply quantity of the pipe network are realized.
As shown in fig. 2, the operation state of the pipe network after demodulation degree control can be intuitively learned through online hydraulic model calculation, and uncertainty of decision making by experience is avoided.
Example 3
The embodiment discloses a control processing method for an emergency accident. When an accident occurs in a water supply network, water supply to local areas, particularly high-speed railway stations and trains, cannot be stopped blindly, and the loss caused by the emergency water supply stopping scheme optimized by a hydraulic model is reduced to the minimum. And rapidly positioning to an accident site through calculation of a hydraulic model, checking the positions of valves needing to be closed around, calculating an optimal valve closing scheme, and evaluating whether the water supply capacity of the water supply system after the valves are closed can meet the water consumption requirements outside the accident site. The accident point is isolated, water leakage is stopped for rush repair, timely water consumption outside the accident area is guaranteed to the maximum extent, and meanwhile the accident point is maintained quickly.
As shown in figure 3, for the accident maintenance of the explosive tube section, the maintenance valves 1, 2, 3 and 4 are closed in a simulated mode, and the scheme is the accident minimum influence scheme.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A method for establishing and applying an online hydraulic model of a water supply pipe network of a high-speed rail station is characterized by comprising the following steps:
s1: collecting and sorting basic attribute data of a water supply pipe network of a high-speed rail station;
s2: according to the basic attribute data in the S1, a water supply pipe network topological structure model is established through EPANET pipe network modeling software;
s3: performing parameter assignment on each component of the topological structure model, and manually checking whether the topological structure and the valve state of the model are correct or not;
s4: the model is checked on line, model parameters are corrected and adjusted in a self-adaptive mode, and whether the model meets the use requirements or not is judged through data checking of on-line monitoring points;
s5: the application model analyzes the current operation situation of the pipe network, guides the operation scheduling of the water supply system, further optimizes the scheduling scientifically and reasonably, and controls and processes emergency accidents.
2. The method for establishing and applying the online hydraulic model of the water supply network of the high-speed rail station as claimed in claim 1, wherein the basic attribute data comprises static attribute data and dynamic attribute data of the water supply system, the static attribute data forms a basic topological structure of the model, and the dynamic attribute data controls all time changes and operation processes of the model.
3. The method for establishing and applying the online hydraulic model of the water supply pipe network of the high-speed railway station as claimed in claim 2, wherein the static attribute data comprises static data of GIS data of the pipe network, water sources, water pumps, pipe sections and water consumption nodes, and is obtained by surveying/managing/collecting GIS systems, pipe network system diagrams and personnel site.
4. The method for establishing and applying the online hydraulic model of the water supply network of the high-speed rail station as claimed in claim 2, wherein the dynamic attribute data comprises the data of the pressure, flow, water level, water pump operation and valve state change process measured from each part of the pipe network, and the data is acquired by a data acquisition instrument and a sensor device of an online monitoring system.
5. The method for establishing and applying the online hydraulic model of the water supply network of the high-speed railway station according to claim 1, wherein the main elements of the topological structure of the model are pipe sections and water using nodes, and the microstructure of an actual water supply system is adopted.
6. The method for establishing and applying the online hydraulic model of the water supply pipe network of the high-speed rail station as claimed in claim 1, wherein the online model checking method comprises the following steps:
the hydraulic model and the online monitoring system are butted, actual working condition data are led into the model, model calculation is carried out through iterative real-time data, pipe section flow and water node pressure results calculated by the model are compared with online monitoring data of limited monitoring points, if errors exceed threshold values, reasons are analyzed, model parameters are modified and/or a model structure is checked, and the steps are repeated until the errors are qualified.
7. The method for establishing and applying the online hydraulic model of the water supply pipe network of the high-speed railway station as claimed in claim 6, wherein the online check comprises the following four aspects:
a. checking the pressure of a water consumption node and the water consumption, wherein the water consumption comprises basic water consumption and random water consumption;
b. checking the roughness coefficient or the resistance coefficient of the pipe section;
c. checking a water supply system model, wherein the checking comprises model data information and image information of a water supply system;
d. checking the working characteristic curves of the equipment, such as the working characteristic curves of a valve and a water pump.
8. The method for establishing and applying the online hydraulic model of the water supply network of the high-speed rail station as claimed in claim 7, wherein the standard for checking the pressure is that the error between the pressure of more than 80% of the pressure monitoring points and the model calculation result is within ± 1.0m, or the error between the pressure of more than 90% of the pressure monitoring points and the model calculation result is within ± 2m, or the average error between the flow of the important water supply pipeline monitoring points and the model calculation result is within ± 10%.
9. The method for establishing and applying the online hydraulic model of the water supply network of the high-speed rail station according to claim 1, wherein the model application is that corresponding scheduling decisions are made on the opening and closing of the water pump and/or the opening degree of the valve on a model checked in S4 according to data monitored in real time in a pipe network, whether the scheduling decisions meet the water supply requirements is calculated and analyzed in real time, if the requirements are met, the scheduling strategies are considered to be reasonable and effective, actual operation can be issued for scheduling, and the on-site guidance scheduling decisions of the online hydraulic model are realized.
10. The method for establishing and applying the online hydraulic model of the water supply pipe network of the high-speed rail station according to claim 1, wherein the current operation situation analysis in the S5 mainly comprises the analysis of the rationality of pipe network arrangement and the analysis of the operation conditions of water using nodes; the control processing of the emergency accident firstly utilizes the calculation result of the model to quickly position the accident site, calculates the optimal valve closing scheme around the accident site to isolate the accident site, and evaluating whether the water supply capacity after closing the corresponding valve meets the water demand of the area outside the accident site.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117150693A (en) * | 2023-09-03 | 2023-12-01 | 深圳市水务科技发展有限公司 | Drainage pipe network hybrid-joint transformation optimization model system based on deep learning |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117150693A (en) * | 2023-09-03 | 2023-12-01 | 深圳市水务科技发展有限公司 | Drainage pipe network hybrid-joint transformation optimization model system based on deep learning |
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