Network Hydraulic Model Overview
The pipe network hydraulic model system integrates the static information of the GIS system and the dynamic information of the SCADA system, and combines the forecast, estimation and distribution of water consumption, and performs hydraulic modeling and simulation calculations for the water supply system of the water company according to the hydraulic theory, and can track the water supply online The hydraulic operation status of the system can calculate the hydraulic information such as flow, pressure drop, flow velocity of all pipelines, pressure of water plants and user nodes in real time, and provide a basis for scientific scheduling and management of the water supply system. The hydraulic model system of pipe network is the foundation of pipe network leakage control and partition metering.
Through the hydraulic simulation and application system of the water supply pipe network, the urban water supply pipe network buried underground can be visualized, and the hidden world of water in the pipe network can be truly presented. It is an auxiliary decision-making tool to realize the scientific management of the water supply system. The most effective tool for the actual operation of the pipe network.
The hydraulic model of the pipe network is the engine of smart water affairs
Construction goal of hydraulic model of pipe network
(1) Through the construction of the hydraulic model system of the pipeline network, realize the 24h dynamic simulation of the operation status of the pipeline network, analyze the pressure distribution and pressure change of the pipeline network operating conditions, guide the operation and scheduling of the pipeline network in real time, and improve the economy of the pipeline network operation and construction sex and safety.
(2) With the help of the hydraulic model system of the pipe network, analyze the operating conditions of the established water supply pipe network, evaluate and predict the characteristics of the water supply, and then propose necessary plans for the transformation and optimization of the pipe network.
(3) Use the hydraulic model of the pipe network to diagnose abnormal conditions in the pipe network, find the dispatching plan for dealing with emergencies in the water supply system by simulating the switch, start and stop of valves or pumps, and analyze the impact and consequences of projects or accidents on the pipe network, Guide the daily water supply network scheduling and reduce operating costs.
Capabilities of the Network Hydraulic Model
According to the current SCADA, automatic control system detection data, etc., the water supply pipe network model can be used to simulate and analyze the operation status of the entire water supply pipe network. And simulate various scenarios. The system should support scenario simulation configuration management, and at the same time, it can conduct multi-dimensional analysis and statistics on the simulation results. The entire online simulation analysis should be run on the dispatcher operation platform, which is easy to operate and the operation process should conform to the schedule It supports the business logic of employees' daily work and is easy to use.
It is necessary to support the basic requirements of various scheduling methods for simulating pumps, valves and other facilities.
(1) It can accurately simulate various facilities in the pipeline network, including: nodes, water source points, reservoirs/pools, water tanks; pipelines, fire hydrants, water meters, flow meters, water pumps, booster pump stations, reservoir pump stations, valves, etc.
(2) In addition to accurately simulating fixed-speed pumps, it can also simulate variable-frequency pumps, and how the variable-frequency pumps adjust the operating conditions of water pumps according to pressure and flow.
(3) It can accurately simulate the operation mode of booster pumping station and reservoir pumping station, mainly including:
Simulate the switching status of existing pumping stations;
Simulate the scheduling method of pump station opening and closing according to time;
Simulate the operation mode of pressurized reservoir pumping station and reservoir pumping station according to flow or pressure scheduling;
Simulate the operation mode of automatic opening and closing according to the water level of the reservoir in the pumping station of the reservoir.
(4) Various scheduling valves can be simulated. In addition to controlling the valve opening according to time, it can also simulate the operation of the valve according to the relationship between pressure, flow and flow water level in the pipeline network. Including: ordinary valves (gate valves, butterfly valves, etc.), check valves; scheduling valves (manual, automatic) such as pressure reducing valves, flow regulating valves; floating ball valves, flow control valves and other valves.
On the one hand, it is possible to grasp the real-time operation status of the established pipeline network, analyze the operation functions of each component in the pipeline network system, find problems existing in the current situation of the pipeline network, predict the impact of pipeline network maintenance and transformation on the overall system, and formulate scientifically and rationally. Short-term and long-term pipeline network reconstruction and expansion plans;
On the other hand, it can analyze and predict the operating conditions of the water supply system under different boundary conditions of the operation of the pipeline network, and provide auxiliary decision support for the safe operation of the pipeline network system, the improvement of operational efficiency, energy saving and consumption reduction, and the provision of enterprise customer service levels .
Specifically in:
a. Planning, design and expansion of water supply system;
b. Optimize the operation mode and pipe network structure of the water supply system to improve the safety of the water supply system;
c. Optimize the planning and design of the pipeline network to make the investment more reasonable and efficient;
d. Guide and help arrange leak detection activities to reduce leakage rate and improve water supply efficiency;
e. Priority assessment of pipe network reconstruction;
f. Diagnose abnormal conditions in the pipeline network, such as: wrongly closing valves, sudden changes in friction, etc., and propose solutions;
g. Analyze the degree of impact of accidents or projects on users' water use, analyze the causes of water difficulties, and improve the level of water supply service obligations;
h. Investigate the phenomenon of "water return" in large-scale water supply systems;
i. Simulation analysis of water supply areas with multiple water sources, dynamic drawing of hydraulic boundary lines, and finding the economic opening of seasonal valves;
j. Analyze the daily operation conditions of the pipe network, guide the daily water supply scheduling of the pipe network, and optimize the operating cost
Make scheduling plans for holidays and accidents;
k. Help to select the location of measuring points in the pipe network and optimize the arrangement of measuring points;
h. Connected to the SCADA system, online real-time simulation, grasp the real-time operation status of the water supply network, realize offline or online optimal scheduling, and assist scheduling decision-making;
i. Provide a feasible solution to regional pressure fluctuation problems and reduce pipe bursts;
j. Develop water quality models based on hydraulic models, simulate pollutant diffusion process, analyze water age, and diagnose water quality failures.