High-pressure water injection pump pipe network simulation platform built based on SIMULINK

Abstract

The invention relates to a high-pressure water injection pump pipe network simulation platform built based on SIMULINK. The high-pressure water injection pump pipe network simulation platform comprises a water injection pump platform module, a water injection pump module and a monitoring control module. The water injection pump platform module is used for simulating the whole water injection pump platform; the water injection pump module is used for controlling the water injection pump platform module; the monitoring control module is used for monitoring flow and pressure parameters of all points of a pipeline in the water injection pump platform module and sending a control signal to the water injection pump module. According to the platform, models of the permanent magnet synchronous motor, the water injection pump and the pipe network are built through the digital twin technology, the conditions of flow, pressure, efficiency and the like of different nodes and pump components of the pipe network are monitored, and the operation stability of the platform is guaranteed. Therefore, the method can be widely applied to the field of water injection pump system control.

Description

Technical Field

[0001] The present invention relates to the field of injection pump system control, and particularly to a high-pressure injection pump pipe network simulation platform built based on SIMULINK. Background Art

[0002] China is rich in marine resources, with the marine oil reserves of about 24 billion tons, and the offshore oil and gas will become the main replacement area of China's energy. The injection pump system maintains the formation pressure of the oilfield by injecting water into the wellbore, and plays an important role in maintaining the oil production of the oilfield and ensuring the safe production of oil. Among them, the high-pressure injection pump, as the core component of the injection pump system, has a large power and an efficiency of 70% - 85%, and its energy consumption accounts for 30 - 40% of the total energy consumption of the offshore platform. The complex downhole working conditions lead to the long-term inefficient operation of the injection pump system and huge energy consumption. The high-pressure injection pump is generally driven by an asynchronous motor, which is a typical high-energy-consuming device, and the power of its driving motor is generally between 500 - 1500 kW. The annual injection volume of the oilfield varies greatly. The injection pump adjusts the flow rate through the outlet valve, and the pump operates in the inefficient area of the off-design condition for a long time. When operating under light load, the motor efficiency drops significantly, generally lower than 75%.

[0003] Aiming at the problems of low operation efficiency, backward regulation mode and huge energy consumption of the injection pump on the offshore platform, through the research on the drive of high-power permanent magnet variable-frequency motor, the efficient operation strategy of the pump and motor system, and the variable-condition intelligent control algorithm, the overall operation efficiency under complex working conditions of the injection system can be improved, energy conservation and consumption reduction can be achieved, carbon emissions can be reduced, and the national "dual carbon" goal can be helped to be achieved at an early date. However, during the operation of the injection pump system, due to its sealing property and measurement difficulties, the pump efficiency, motor efficiency, pipeline network loss, etc. cannot be directly measured. Summary of the Invention

[0004] Aiming at the technical problems that in the actual operation of a large injection pump system, due to the sealing property and measurement difficulties of the system, the pump efficiency, motor efficiency, pipeline network loss, etc. cannot be directly measured, the present invention provides an injection pump pipe network simulation platform built based on SIMULINK. This platform uses digital twin technology to build models of the motor, injection pump and pipeline network, monitors the flow rate, pressure, efficiency, etc. of different nodes of the pipeline network and pump and motor components, and ensures the stability of the platform operation.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A high-pressure injection pump pipe network simulation platform built based on SIMULINK, comprising: an injection pump platform module, an injection pump module and a monitoring and control module; The injection pump platform module is used to simulate the entire injection pump platform; The injection pump module is used to control the injection pump platform module; The monitoring and control module is used to monitor the flow rate and pressure parameters at various points in the pipeline of the water injection pump platform module, and send control signals to the water injection pump module.

[0006] Further, the water injection pump platform module includes a constant head water storage tank, a return water pool, a first water injection pump platform, a second water injection pump platform, first to third resistance pipelines, and a water inlet water storage tank; The constant head water storage tank is respectively connected to one ends of the first water injection pump platform and the second water injection pump platform, and the other ends of the first water injection pump platform and the second water injection pump platform are respectively connected to the first resistance pipeline and the second resistance pipeline; The other ends of the first resistance pipeline and the second resistance pipeline are connected in parallel and then connected to the third resistance pipeline, and the third resistance pipeline is connected to the water inlet water storage tank; The return water pool is connected to the water head water storage tank.

[0007] Further, the water injection pump module includes a permanent magnet synchronous motor module, a centrifugal pump module, and fourth to seventh resistance pipelines; The output end of the permanent magnet synchronous motor module is connected to the centrifugal pump module, the output end of the centrifugal pump module is sequentially connected to the fourth resistance pipeline and the fifth resistance pipeline, and the fifth resistance pipeline is used as an output end to be connected to the first water injection pump platform to control the flow rate and pressure of the first water injection pump platform; The other output end of the centrifugal pump module is sequentially connected to the sixth resistance pipeline and the seventh resistance pipeline, and the seventh resistance pipeline is used as another output end to be connected to the second water injection pump platform to control the flow rate and pressure of the second water injection pump platform.

[0008] Further, the permanent magnet motor module includes a 380V power supply, a voltage inverter, an SVPWM module, a coordinate transformation module, a PI controller, and an oscilloscope connected in sequence.

[0009] Further, the monitoring and control module includes a data monitoring module, a steady-state analysis module, a transient analysis module, and a control and regulation module; The data monitoring module is used to monitor the flow rate and pressure parameters at various points in the pipeline of the water injection pump platform module; The steady-state analysis module and the transient analysis module are respectively used to perform steady-state and transient analyses on the system operation state according to the monitoring data; The control and regulation module is used to adjust the real-time flow rate of the centrifugal pump module according to the calculation results of the steady-state analysis module and the transient analysis module.

[0010] Further, the data monitoring module includes a temperature monitoring module, a pressure monitoring module, and a voltage monitoring module; The temperature monitoring module is used to monitor the temperatures at the outlet of the constant head water storage tank, the inlet of the first water injection pump platform, and the inlet end of the water inlet storage tank in real time; The voltage monitoring module is used to monitor the voltages of the constant head water storage tank and the water inlet storage tank in real time; The pressure monitoring module is used to monitor the pressures at preset positions of each resistance pipeline in real time.

[0011] Furthermore, the steady-state analysis module is built-in with a pipe network hydraulic calculation mathematical model, a parameter identification model, and an operation model; The pipe network hydraulic calculation mathematical model is used to describe the relationships between various attributes of the pipe network through matrices and solve them by the iterative method to obtain steady-state parameters; The parameter identification model is used to predict the pipe flow rate and pressure data based on the steady-state parameters; The operation model is used to calculate the pump efficiency, motor efficiency, and pipe network losses based on the pipe flow rate and pressure data, and use them as inputs to the control and regulation module.

[0012] Furthermore, the transient analysis module is built-in with a curve drawing module, an operation state identification module, and an output module; The curve drawing module is used to simulate the pressure fluctuations and flow rate fluctuations during the transient process under changing working conditions based on the characteristic line method of the non-constant flow differential equations of the pressurized pipeline, and draw the pressure and flow rate change curves of each water supply pipeline in the technical water supply pipe network; The operation state identification module is used to analyze the drawn curves and identify the operation states of the system under different working conditions; The output module is used to send the operation state analysis results to the control and regulation module.

[0013] Furthermore, the relevant curves drawn by the curve drawing module include the characteristic curves of the centrifugal pump module and the pipeline characteristic curves of each resistance pipeline.

[0014] Furthermore, the control and regulation module includes a throttle regulation module and a variable frequency speed regulation module; The throttle regulation module is used to adjust the opening degree of the valve on the corresponding outlet pipeline according to the real-time flow demand of the user end, so as to adjust the real-time flow rate of the water injection pump platform; The variable frequency speed regulation module is used to adjust the power supply frequency or voltage of the permanent magnet motor module according to the real-time flow demand of the user end, and then adjust the real-time flow rate of the water injection pump platform.

[0015] Due to the adoption of the above technical solutions, the present invention has the following advantages: 1. The present invention is based on an existing actual water injection pump platform. During the operation of the system, due to the system's enclosure and measurement difficulties, it is impossible to directly measure pump efficiency, motor efficiency, pipeline losses, etc. Functional modules of SIMULINK are used to model the main components in the permanent magnet motor-driven high-pressure water injection system, including the overall platform construction of the motor, water injection pump, and pipeline network, and monitor parameters such as flow rate and pressure at various points in the pipeline to ensure the stable operation of the system.

[0016] 2. The present invention conducts simulation and performance analysis on the selected high-power permanent magnet motor, and adjusts parameters such as model current and size in SIMULINK to meet the performance requirements of the prototype motor. The characteristics curve of the permanent magnet synchronous motor under different rotational speeds and load conditions is studied through numerical simulation, and thus the high-efficiency working area and rotational speed range of the motor are obtained. Through the digital twin technology of the platform, it is easier to study the energy conversion mechanism and internal energy loss mechanism of the permanent magnet synchronous motor under different working conditions. The variable-frequency energy-saving control technology of the permanent magnet motor is embedded in the demonstration prototype, an energy-saving intelligent control system for the water injection system is established, the starting, speed-changing, load-changing processes, and steady-state operation process are selected as typical working conditions, and the energy consumption evaluation and energy-saving effect evaluation of the new water injection pump system are carried out. It lays a foundation for studying the efficient operation strategy of the pump-motor system and the digital twin platform research.

[0017] Therefore, the present invention can be widely applied to the control field of water injection pump systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as limiting the present invention. Throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1a is the overall model of the offshore high-pressure water injection pump platform built based on SIMULINK provided by the embodiment of the present invention; Figure 1b is Figure 1a the component module of the water injection pump modules connected in parallel in the system; Figure 2 is the schematic diagram of the construction of the permanent magnet motor module provided by the embodiment of the present invention; The reference numerals in the drawings are as follows: 1. Water storage tank; 2. Return water pool; 3. Water injection pump platform; 4. Resistance pipeline; 5. Inlet water storage tank; 6. Permanent magnet synchronous motor module; 7. Centrifugal pump module. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0020] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Aiming at the problems of low operating efficiency, backward regulation mode and huge energy consumption of water injection pumps on offshore platforms, in order to ensure the safety requirements of the flow and pressure of the water injection pump system under steady-state and transient conditions and achieve the goal of green energy conservation at the same time, the present invention provides a water injection pump network simulation platform built based on SIMULINK. This platform models the main components in the high-pressure water injection system driven by permanent magnet motors, including the models of motors, water injection pumps and pipe networks, and monitors the parameters such as pressure and flow at each node of the pipeline in real time to ensure the stability of the overall system and lay a foundation for the operation of the later experimental platform.

[0022] Embodiment 1 As Figure 1a and Figure 1b shown, this embodiment provides a high-pressure water injection pump network simulation platform built based on SIMULINK, which includes: a water injection pump platform module, a water injection pump module and a monitoring and control module. Among them, the water injection pump platform module is used to simulate the entire water injection pump platform; the water injection pump module is used to control the water injection pump platform module; the monitoring and control module is used to monitor the parameters such as the flow rate and pressure at each point of the pipeline in the water injection pump platform module and send control signals to the water injection pump module to ensure the stable operation of the system.

[0023] Furthermore, the water injection pump platform module includes a constant head water storage tank 1, a return water pool 2, a first water injection pump platform 31, a second water injection pump platform 32, first to third resistance pipes 41 to 43, and a water inlet water storage tank 5. Among them, the water head water storage tank 1 is respectively connected to one end of the first water injection pump platform 31 and the second water injection pump platform 32, and the other ends of the first water injection pump platform 31 and the second water injection pump platform 32 are respectively connected to the first resistance pipe 41 and the second resistance pipe 42; the other ends of the first resistance pipe 41 and the second resistance pipe 42 are connected in parallel and then connected to the third resistance pipe 43, and the third resistance pipe 43 is connected to the water inlet water storage tank 5.

[0024] Furthermore, the water injection pump module includes a permanent magnet synchronous motor module 6, a centrifugal pump module 7, and fourth to seventh resistance pipes 44 to 48. Among them, the output end of the permanent magnet synchronous motor module 6 is connected to the centrifugal pump module 7, the output end of the centrifugal pump module is successively connected to the fourth resistance pipe and the fifth resistance pipe, and the other end of the fifth resistance pipe is used as the output end to be connected to the first water injection pump platform 31 to control the flow rate and pressure of the first water injection pump platform 31 to ensure the stable operation of the system. The other end of the centrifugal pump module 7 is successively connected to the sixth resistance pipe and the seventh resistance pipe, and the seventh resistance pipe is used as another output end to be connected to the second water injection pump platform 32 to further adjust the flow rate and pressure of the system to ensure the efficient operation of the system.

[0025] Furthermore, the permanent magnet motor module 6 and the centrifugal pump module 7 are arranged in accordance with the actual situation.

[0026] Furthermore, as Figure 2 shown, the permanent magnet motor module 6 includes a 380V power supply, a voltage inverter, an SVPWM module, a coordinate transformation module, a PI controller, an oscilloscope, etc. connected in sequence. In this embodiment, compared with the prior art, the permanent magnet motor module improves the response speed and control accuracy of the system by optimizing the module connection method.

[0027] Furthermore, the monitoring and control module includes a data monitoring module, a steady-state analysis module, a transient analysis module, and a control and adjustment module. Among them, the data monitoring module is used to monitor parameters such as the flow rate and pressure at each point of the pipeline in the water injection pump platform module; the steady-state analysis module and the transient analysis module are respectively used to perform steady-state and transient analyses based on the monitoring data; the control and adjustment module is used to adjust the real-time flow rate of the centrifugal pump module according to the calculation results of the steady-state analysis module and the transient analysis module.

[0028] Furthermore, the data monitoring module includes a temperature monitoring module, a pressure monitoring module, and a voltage monitoring module. Among them, the temperature monitoring module ( Figure 1a represented by the letter T inFigure 1a which is represented by the letter V in the figure) is used to monitor the voltage of the water head storage tank 1 and the water inlet storage tank 5 in real time; the pressure monitoring module ( Figure 1a which is represented by a small box with V in the figure) is used to monitor the pressure at the preset positions of each resistance pipeline in real time.

[0029] Furthermore, the steady-state analysis module is built-in with a mathematical model for hydraulic calculation of the pipe network, a parameter identification model, and an operation model. Among them, the mathematical model for hydraulic calculation of the pipe network is used to describe the relationship between the various attributes of the pipe network through a matrix and solve it by the iterative method to obtain steady-state parameters; the parameter identification model is used to predict the pipeline flow rate and pressure data based on the steady-state parameters; the operation model is used to calculate the pump efficiency, motor efficiency, and pipe network losses based on the pipeline flow rate and pressure data for subsequent throttle regulation and variable frequency speed regulation to optimize the system operation efficiency and solve the measurement difficulty problem of the existing water injection system.

[0030] Furthermore, the transient analysis module is built-in with a curve drawing module, a curve analysis module, and an output module. Among them, the curve drawing module is used to simulate the pressure fluctuation and flow rate fluctuation during the transient process under changing working conditions based on the characteristic line method of the non-constant flow differential equations of the pressurized pipeline, and draw the pressure and flow rate change curves of each water supply pipeline in the technical water supply pipe network; the curve analysis module is used to analyze the drawn pressure and flow rate change curves to identify the operation state of the system under different working conditions; the output module is used to send the operation state analysis result to the control and regulation module.

[0031] Furthermore, the relevant curves drawn in the curve drawing module include the characteristic curve of the centrifugal pump module and the pipeline characteristic curve of each resistance pipeline.

[0032] Specifically, since there are six main operating parameters of the centrifugal pump module 7, including: flow rate ( Q ), head ( H ), shaft power ( N ), efficiency ( η ), rotational speed ( n ), and net positive suction head ( NPSHr ). Among them, the head, shaft power, and efficiency are all related to the real-time operating conditions of the centrifugal pump. According to the actual product data of the centrifugal pump, in this embodiment, the characteristic curve of the centrifugal pump mainly includes Q~H characteristic curve, Q~N characteristic curve, and Q~η characteristic curve. These curves can be obtained by fitting 5 to 10 data points obtained by simulation during power frequency operation through the least squares method or interpolation method.

[0033] Each resistance pipeline corresponds to a Q~H pipeline characteristic curve:

[0034] In the formula, is the total head required for the water supply system, with the unit of m, is the total current flow required by the pipe network, with the unit of m 3 / h. is the pipe resistance coefficient, with the unit of h 2 / m 2 ; is the static water pressure, with the unit of m 。

[0035] Furthermore, the control and regulation module includes a throttling regulation module and a variable frequency speed regulation module. Among them, the throttling regulation module is used to adjust the opening degree of the valve on the corresponding outlet pipeline according to the real-time flow demand of the user end, so as to realize the regulation of the real-time flow of the water injection pump platform; the variable frequency speed regulation module is used to adjust the power supply frequency or voltage of the permanent magnet motor module 6 according to the real-time flow demand of the user end, and then regulate the real-time flow of the water injection pump platform.

[0036] Furthermore, the throttling regulation is used to control the real-time flow of the water pump. The throttling regulation can also be called a control valve or valve regulation. The regulation method is to timely adjust the opening degree of the valve on the outlet pipeline of the water pump according to the real-time flow demand of the user end (in Figure 1a a valve is provided on the outlet pipeline of the actual water injection pump platform module to regulate the flow of the water pump. By adjusting the opening degree of the valve, the real-time flow of the water pump can be regulated to meet the real-time flow demand of the user end). Thus, the regulation of the real-time operating condition of the water pump is completed. During the operation of the system using throttling regulation, the real-time operating point of the water pump changes until it meets the system requirements. When the real-time flow demand suddenly decreases at a certain moment or time period of the system, closing the valve will undoubtedly increase the local resistance of the pipeline, causing the characteristic curve of the pipeline system to become steeper and the real-time operating points of the water pump and pipeline system to decrease, thus achieving the purpose of throttling. In addition, since the flow-axial power characteristic curve of the centrifugal pump is an ascending type, when using valve throttling regulation, when the flow decreases, the shaft power N of the water pump also decreases accordingly, so there is no overload risk to the water pump motor. Moreover, using valve regulation is simple and convenient, so it is still a commonly used method in the actual operation of water supply pumping stations.

[0037] In some embodiments, the core of the variable frequency speed regulation is the frequency converter. This regulation method is to convert the power frequency electricity supplied by the power grid into alternating current with variable voltage and frequency through the frequency converter, and then supply it to the permanent magnet motor module 6 and change the motor speed in real time as needed, so that the water pump can operate at variable speed.

[0038] Among them, when the power supply frequency or voltage of the permanent magnet motor module 6 changes, the synchronous speed of the motor will also change accordingly , but considering the slip ratio varies accordingly with the synchronous speed of the motor, and the corresponding formula is:

[0039] In the formula, is the actual speed of the motor, and thus the calculation formula for the actual speed of the motor is:

[0040] From this formula, it can be seen that during the regulation process of the operating conditions of the parallel pump group in the water supply system, by adjusting the supply frequency of the permanent magnet motor 6 within a certain range, the motor speed can be correspondingly changed, thereby completing the regulation of the real-time operating point.

[0041] In some embodiments, for the real-time operating point of the system operation, it is the balance point jointly formed by the parallel water pump unit and the pipeline system. For the regulation of the real-time operating point of the water pump, either by changing the characteristic curve of the water pump, i.e., variable frequency speed regulation; or by changing the characteristic curve of the pipeline, i.e., valve regulation or other regulation methods. No matter which regulation method is used, relevant indicators such as the stability and energy conservation of the system should be considered as much as possible while achieving water supply balance.

[0042] In summary, the present invention discloses an offshore high-pressure water injection pump pipe network platform built based on SIMULINK. Using the functional modules of SIMULINK to model the main components in the high-pressure water injection system driven by a permanent magnet motor, including the motor, water injection pump, and the overall platform construction of the pipe network, and monitoring parameters such as the flow rate and pressure at each point of its pipeline to ensure the stable operation of the system. It lays a foundation for researching the efficient operation strategy of the machine-pump system and the digital twin platform research.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A high-pressure water injection pump network simulation platform based on SIMULINK, characterized in that: include: Water injection pump platform module, water injection pump module and monitoring and control module; The water injection pump platform module is used to simulate the entire water injection pump platform; The water injection pump module is used to control the water injection pump platform module; The monitoring and control module is used to monitor the flow and pressure parameters of each point in the pipeline of the water injection pump platform module, and send a control signal to the water injection pump module.

2. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 1, characterized in that: The water injection pump platform module includes a constant head water storage tank, a return water tank, a first water injection pump platform, a second water injection pump platform, first to third resistance pipelines and a water inlet storage tank; The constant water head water storage tank is connected to one end of the first water injection pump platform and the second water injection pump platform respectively, and the other ends of the first water injection pump platform and the second water injection pump platform are connected to the first resistance pipeline and the second resistance pipeline respectively; The other ends of the first resistance pipeline and the second resistance pipeline are connected in parallel and then connected to the third resistance pipeline, and the third resistance pipeline is connected to the water inlet storage tank; The return water tank is connected to the head water storage tank.

3. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 2, characterized in that: The water injection pump module includes a permanent magnet synchronous motor module, a centrifugal pump module and fourth to seventh resistance pipelines; The output end of the permanent magnet synchronous motor module is connected to the centrifugal pump module, and the output end of the centrifugal pump module is connected to the fourth resistor pipeline and the fifth resistor pipeline in sequence, and the fifth resistor pipeline is connected to the first water injection pump platform as an output end, so as to control the flow rate and pressure of the first water injection pump platform; The other output end of the centrifugal pump module is connected to the sixth resistor pipeline and the seventh resistor pipeline in sequence, and the seventh resistor pipeline is connected to the second water injection pump platform as another output end for controlling the flow and pressure of the second water injection pump platform.

4. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 3, characterized in that: The permanent magnet motor module includes a 380V power supply, a voltage inverter, an SVPWM module, a coordinate transformation module, a PI controller and an oscilloscope which are connected in sequence.

5. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 3, characterized in that: The monitoring and control module includes a data monitoring module, a steady-state analysis module, a transient analysis module and a control and regulation module; The data monitoring module is used to monitor the flow and pressure parameters of each point in the pipeline of the water injection pump platform module; The steady-state analysis module and the transient analysis module are used to perform steady-state and transient analysis on the system operation status according to the monitoring data, respectively; The control and regulation module is used to regulate the real-time flow of the centrifugal pump module according to the calculation results of the steady-state analysis module and the transient analysis module.

6. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 5, characterized in that: The data monitoring module includes a temperature monitoring module, a pressure monitoring module and a voltage monitoring module; The temperature monitoring module is used to monitor the temperature of the constant head water storage tank outlet, the first water injection pump platform inlet and the water inlet water storage tank inlet in real time; The voltage monitoring module is used to monitor the voltage of the constant head water storage tank and the water inlet water storage tank in real time; The pressure monitoring module is used to monitor the pressure at a preset position of each resistance pipeline in real time.

7. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 5, characterized in that: The steady-state analysis module has a built-in pipe network hydraulic calculation mathematical model, a parameter identification model and an operation model; The pipe network hydraulic calculation mathematical model is used to describe the relationship between various attributes of the pipe network through a matrix, and to obtain steady-state parameters by using an iterative method for solution; The parameter identification model is used to predict pipeline flow and pressure data based on steady-state parameters; The operation model is used to calculate the pump efficiency, motor efficiency and pipeline network loss according to the pipeline flow and pressure data, which serve as the input of the control and regulation module.

8. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 5, characterized in that: The transient analysis module has built-in curve drawing module, operation status identification module and output module; The curve drawing module is used to simulate the pressure fluctuation and flow fluctuation in the transient process under the change of working conditions based on the characteristic line method of the differential equation group of unsteady flow in the pressurized pipeline, and draw the pressure and flow change curves of each water supply pipeline in the technical water supply network; The operating state identification module is used to analyze the drawn curve and identify the operating state of the system under different working conditions; The output module is used to send the operating status analysis result to the control and regulation module.

9. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 8, characterized in that: The relevant curves drawn by the curve drawing module include the characteristic curve of the centrifugal pump module and the pipeline characteristic curves of each resistance pipeline.

10. A high-pressure water injection pump network simulation platform based on SIMULINK as claimed in claim 5, characterized in that: The control and regulation module includes a throttling regulation module and a variable frequency speed regulation module; The throttling adjustment module is used to adjust the opening of the valve on the corresponding water outlet pipeline according to the real-time flow demand of the user end, so as to adjust the real-time flow of the water injection pump platform; The variable frequency speed regulation module is used to adjust the power supply frequency or voltage of the permanent magnet motor module according to the real-time flow demand of the user end, and then adjust the real-time flow of the water injection pump platform.

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