A digital-physical interaction simulation system and control method for a deep offshore energy island

Abstract

The application provides a digital-physical interaction simulation system and control method for a deep-sea energy island, which comprises a physical presentation layer, a digital simulation layer and a driving interaction layer. The physical presentation layer is a scaled physical model comprising display devices; the digital simulation layer comprises a digital monitoring interface and a digital model constructed based on a process simulation platform; and the driving interaction layer adopts a programmable controller. The method comprises the following steps: inputting an instruction in the digital monitoring interface, receiving the instruction by the programmable controller, outputting a control signal to the simulation digital model, calculating and generating state data by the digital model and feeding back the state data to the controller, driving each display screen on the physical model to display data by the controller, outputting data to the digital monitoring interface, observing the state change of the physical model and evaluating the effect, and then adjusting the instruction to complete a digital-physical interaction process. The application can effectively improve the operation efficiency of the energy island system and the utilization rate of renewable energy.

Description

Technical Field

[0001] This invention relates to the field of energy system modeling, simulation and control technology, specifically to a data-physical interaction simulation system and control method for deep-sea energy islands. Background Technology

[0002] In response to the national strategic goal of "carbon peaking and carbon neutrality," and focusing on the core needs of energy transformation in coastal areas, it is imperative to promote a clean and low-carbon transformation of the energy structure. Currently, deep-sea energy development has become an important direction for the transformation of coastal areas. Deep-sea energy typically integrates various devices such as wind power, photovoltaic power, wave power generation, hydrogen production, ammonia and methanol synthesis, and energy storage, forming a complex multi-energy system. A key issue in the design of energy island control systems is how to effectively verify system control strategies and intuitively demonstrate system control behavior.

[0003] Currently, purely digital simulation methods lack realistic physical feedback, making it difficult to simulate the actual coupling effects within the system. Building a full-scale model verification platform is time-consuming, costly, and structurally difficult to adjust. For the unique application scenario of deep-sea energy islands, characterized by strong energy volatility, harsh operating environments, and challenging maintenance, it is crucial to fully verify the rationality of the overall architecture, the effectiveness of the control strategy, and the stability of system operation in a low-cost, visual manner during the system design phase. Therefore, a method is needed to design that can synchronously simulate states on a scaled-down physical model and interact with the digital control system in real time and intuitively to achieve control of the energy island system. Summary of the Invention

[0004] The present invention aims to provide a digital-physical interactive simulation system and control method for deep-sea energy islands, realizing real-time two-way interaction between the digital control system and the physical model.

[0005] The specific method is as follows: A digital-physical interaction simulation system for deep-sea energy islands includes a physical presentation layer, a digital system layer, and a driving interaction layer.

[0006] The physical rendering layer includes: The scaled-down physical model is a physical model of the deep-sea energy island created using 3D printing technology. It includes the following symbolic modules: power generation module, energy conversion module, energy storage and distribution module, and data display module.

[0007] Power generation modules: models of wind power generation devices, photovoltaic panels, and wave energy generation devices; Energy conversion modules: Models of electrolytic hydrogen production equipment, ammonia synthesis equipment, and alcohol synthesis equipment; Energy storage and power distribution modules: Models of energy storage and power distribution equipment; Data display module: It adopts a display screen and is installed next to each key device in the physical model of the energy island. It is used to display the simulated operation data calculated by the digital part in real time and keep it consistent with the simulated data on the digital monitoring interface; the auxiliary structure includes an energy island model display base and pipelines connecting each module. Energy transmission module: Multi-segment programmable LED light strips are laid along the key equipment of the energy island model and are divided into power generation section, hydrogen production section, ammonia synthesis section and alcohol synthesis section according to the process flow. The LEDs in each segment are independently controlled and used to map key status parameters such as wind and solar power generation, hydrogen production, ammonia production and alcohol production in real time.

[0008] The digital simulation layer includes digital models based on physical model simulation and digital monitoring interfaces: The digital model is built on a process simulation platform to simulate the material and energy conversion in the process of generating electricity from wind, solar and wave energy, producing hydrogen by electrolysis of water, and synthesizing ammonia and methanol in a deep-sea energy island. As a virtual controlled object of the system, it receives control commands, calculates key system parameters, and outputs status data.

[0009] The digital monitoring interface is the visualization platform of the deep-sea energy island's digital-physical interaction simulation system. The interface runs on graphical software on a computer and adopts a modular layout based on the operating logic of the deep-sea energy island system to realize system monitoring and control.

[0010] The driving interaction layer uses a programmable controller to connect the digital system layer and the physical presentation layer. It is used to realize the real-time driving of digital model state data to the physical presentation device and upload digital model feedback data to the monitoring interface to form a complete interactive control.

[0011] A control method for a data-physical interactive simulation system for deep-sea energy islands includes the following steps: S1. Design and build a physical model of the deep-sea energy island system, including offshore wind, solar and wave power generation modules, hydrogen production and ammonia synthesis energy conversion modules, energy storage and power distribution modules, and auxiliary structures. Install displays at the key equipment locations of the model and connect the displays to the programmable controller.

[0012] S2. Construct a digital model of the system on a process simulation platform, design a visual monitoring interface in computer graphics software, and establish a connection with the programmable controller.

[0013] S3. Write a control program in the programmable controller to generate analog signals according to instructions, control the digital model to perform calculations, drive the display screen on the physical model, and receive data synchronously through the digital monitoring interface.

[0014] S4. Input instructions into the digital monitoring interface, the controller receives the instructions, controls the digital model to calculate and output data, synchronously updates the display screen and the content displayed on the digital monitoring interface, simulates the actual equipment response, and realizes two-way interaction between the control system and the physical model.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention proposes a two-way interactive mode between a digital control system and a physical model of an energy island. Through 3D printing technology, low-cost hardware of programmable controllers and simulation software, a deep-sea energy island system is designed and constructed, a visual digital monitoring platform is established, and the control of deep-sea wind and solar power is simulated, realizing the physical presentation and dynamic demonstration of a complex energy system.

[0016] (2) It supports controlling the display of physical models from the digital interface, verifying the system control strategy and improving the level of visualization, and intuitively showing the operation mechanism of deep-sea energy islands. The modular design makes it easy to add or remove equipment and adjust the structure, and is suitable for various energy system simulation needs.

[0017] (3) The digital-physical interactive simulation system can improve the grid connection and absorption capacity of deep-sea wind power and photovoltaic power and the operating efficiency of energy island through rapid verification, improve the utilization rate of renewable energy, and reduce carbon emissions from the energy supply side. Attached Figure Description

[0018] Figure 1 This is a framework diagram of the physical and digital models in this invention.

[0019] Figure 2 This is a framework diagram of the data-object interaction simulation system in this invention.

[0020] List of reference numerals in the attached diagram: 1-Electrolyzer, 2-Hydrogen compressor, 3-Hydrogen storage tank, 4-Nitrogen compressor, 5-Ammonia synthesis reactor, 6-Ammonia storage tank, 7-CO2 compressor, 8-Methanol synthesis reactor, 9-Methanol distillation column, 10-Methanol storage tank; A1 - Diverter, A2, A3 - Mixers, B1, B5, B8 - Stoichiometric reactors, B2, B6, B9 - Flash tanks, B3 - Component separators, B4, B7 - Compressors, B10 - Distillation column. Detailed Implementation

[0021] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0022] Figure 1 The figure shows the scaled-down physical model framework and corresponding simulation digital model of the deep-sea energy island in this invention.

[0023] The physical model mainly includes a power generation module, a hydrogen production module, an ammonia synthesis module, a methanol synthesis module, and an energy transmission module.

[0024] The power generation module includes models of wind power generation devices, photovoltaic panels, and wave energy generation devices to simulate offshore wind, solar, and wave energy generation. After the electricity is collected into the energy storage device, it is converted from DC to AC by an inverter. Part of the electricity is transmitted to the grid, and the other part supplies power to the hydrogen production device and the ammonia synthesis device. In the hydrogen production module, electrolyzer 1 uses desalinated seawater to electrolyze water to produce hydrogen, and hydrogen compressor 2 compresses hydrogen and delivers it to hydrogen storage tank 3 to provide hydrogen for the synthesis of ammonia and alcohols; In the ammonia synthesis module, nitrogen separated from the compressed air by the nitrogen compressor 4 is transported together with hydrogen from the hydrogen storage tank to the ammonia synthesis reactor 5 for reaction. After the product is cooled and condensed, it is separated and the separated liquid ammonia is stored in the ammonia storage tank 6. In the alcohol synthesis module, CO2 collected by CO2 compressor 7 is transported to alcohol synthesis reactor 8 along with hydrogen in hydrogen storage tank for reaction. After the product is condensed and separated, crude methanol enters alcohol distillation column 9 for distillation and is stored in alcohol storage tank 10. Finally, the generated liquid ammonia and methanol are transported by sea. In the energy transmission module, WS2812B programmable LED light strips are selected, with an operating voltage of 5V and a LED density of 30 LEDs / meter. Based on the dimensions of the energy island model, a light strip with a total length of 2 meters and 60 LEDs is cut and then divided into four sections according to the process flow: the power generation section is laid from the convergence point of wind, solar and wave energy in the diagram to electrolyzer 1; the hydrogen production section is laid from electrolyzer 1 to hydrogen storage tank 3; the ammonia synthesis section is laid from hydrogen storage tank 3 to ammonia storage tank 6; and the methanol synthesis section is laid from hydrogen storage tank 3 to methanol storage tank 10.

[0025] A digital model was built on the Aspen Plus V12 process simulation platform, which includes chemical unit modules such as a water electrolysis hydrogen production reactor, an ammonia synthesis reactor, a methanol synthesis reactor, and a distillation column. The model is based on thermodynamic equations and reaction kinetics, and calculates hydrogen production, ammonia production, methanol production and corresponding power consumption based on power generation, which serves as the system's state feedback source.

[0026] The basic method for setting up the physical properties in the hydrogen production process is ELECNRTL. The raw material H2O enters B1—a stoichiometric reactor—and reacts according to the chemical reaction equation for hydrogen production via water electrolysis. The generated H2 and O2 enter a flash tank B2 for vapor-liquid separation. The mixed gas then enters a component separator B3 to obtain H2. The hydrogen then passes through a splitter A1 to provide raw materials for the synthesis of ammonia and alcohols. The newly built process section for ammonia synthesis uses the PR-BM method for setting physical properties. H2 and N2 are split and passed through mixer A3 in a 3:1 ratio, then enter compressor B4 for compression. In stoichiometric reactor B5, they react according to the chemical reaction equation to generate a gas-liquid mixture that enters flash tank B6 to separate liquid ammonia. The newly constructed process section for methanol synthesis uses the NRTL-RK method for setting physical properties. H2 and CO2 are split and passed through mixer A2 in a 3:1 ratio, then enter compressor B7 for compression. In stoichiometric reactor B8, they react according to the chemical reaction equation to generate a gas-liquid mixture, which enters flash tank B9 to separate methanol and water-liquid phase mixture, and then enters distillation column B10 to separate methanol.

[0027] Figure 2 The diagram shows the framework of the digital-physical interaction simulation system of this invention. The system consists of a digital simulation layer, a physical presentation layer, and a driving interaction layer. The digital simulation layer includes a digital monitoring interface and a simulated digital model. The physical presentation part consists of a 3D-printed scaled-down physical model, an SSD1306 OLED display screen, and LED light strips. The driving interaction layer is a programmable controller.

[0028] The programmable controller in the driver interaction layer uses a Raspberry Pi 5, running Raspberry Pi OS Lite (64-bit), and is accessed remotely via SSH. It connects to the same local area network as the digital emulation layer via an Ethernet interface. GPIO interfaces are used to control LED strips, and the I2C bus drives multiple OLED displays. The Raspberry Pi control program includes a data receiving and parsing module, a data mapping and transmission module, and a multi-device synchronization driver module.

[0029] The physical model includes wind, solar, and wave power generation modules, a hydrogen production module, an ammonia / methanol synthesis module, and an energy storage and power distribution module. Each module has an independent display screen to show power data. Display screens are connected to a Raspberry Pi expansion board. All displays use a PCA9548 I2C multiplexer to extend the channel bus in parallel, with the SDA and SCL pins connected in parallel, and GND as a common ground. For each display screen, display content is generated according to its corresponding device type. LED strips are independently powered by an external 5V power supply, and the four strips are connected to the GPIO18, GPIO19, GPIO21, and GPIO12 pins of the Raspberry Pi. The LED strips and the Raspberry Pi share a common ground to ensure stable signal transmission.

[0030] The simulation digital model includes an electrolytic hydrogen production model, an ammonia synthesis model, and a methanol synthesis model. The digital monitoring interface is a designed visualization panel. The operator inputs the power generation command of wind, solar, and wave energy, sends the command to the Raspberry Pi, receives the command, and outputs control signals to the simulation digital model. The digital model calculates and generates status data such as the power consumption of hydrogen production and ammonia and methanol synthesis, and feeds it back to the Raspberry Pi. The Raspberry Pi outputs data to the digital monitoring interface and drives the various displays on the physical model to display the data, completing a digital-physical interaction process.

[0031] The method and specific implementation of the present invention have been described in detail above. Of course, in addition to the examples described above, the present invention may have other embodiments, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection of the present invention.

Claims

1. A digital-physical interactive simulation system for deep-sea energy islands, characterized in that, It includes a physical presentation layer, a digital simulation layer, and a driver interaction layer; The physical presentation layer includes a scaled-down physical model, which is a physical model of the deep-sea energy island created using 3D printing technology. It comprises a power generation module, an energy conversion module, an energy storage and distribution module, a data display module, and an energy transmission module. The power generation module includes models of wind power generation devices, photovoltaic panels, and wave energy generation devices. The energy conversion module includes models of electrolytic hydrogen production equipment, ammonia synthesis equipment, and alcohol synthesis equipment. The energy storage and distribution module includes models of energy storage and distribution equipment. The data display module uses a display screen installed next to each key piece of equipment in the energy island physical model to display the simulated operating data calculated by the digital part in real time, maintaining consistency with the simulated data on the digital monitoring interface. The energy transmission module consists of multiple programmable LED light strips laid along the key equipment of the energy island model, divided into power generation, hydrogen production, ammonia synthesis, and alcohol synthesis sections according to the process flow. Each section of LEDs is independently controlled, used to map key status parameters such as wind and solar power generation power, hydrogen production, ammonia production, and alcohol production in real time. The digital simulation layer includes a digital model based on a physical model simulation and a digital monitoring interface. The digital model is built on a process simulation platform, simulating the material and energy conversion processes in the deep-sea energy island's wind, solar, and wave energy power generation, water electrolysis for hydrogen production, and ammonia and methanol synthesis. As a virtual controlled object of the system, it receives control commands, calculates key system parameters, and outputs status data. The digital monitoring interface is a visualization platform for the deep-sea energy island's digital-physical interaction simulation system. The interface runs on graphical software on a computer and adopts a modular layout based on the system's operational logic to achieve system monitoring and control. The driving interaction layer uses a programmable controller to connect the digital system layer and the physical presentation layer. It is used to realize the real-time driving of digital model state data to the physical presentation device and upload digital model feedback data to the monitoring interface to form a complete interactive control.

2. The data-physical interaction simulation system for deep-sea energy islands according to claim 1, characterized in that, The power generation module includes wind power generation devices, photovoltaic panels, and wave energy generation devices to simulate offshore wind, solar, and wave energy generation. After the electricity is collected in the energy storage device, it is converted from DC to AC by an inverter. Part of the electricity is transmitted to the grid, and the other part supplies power to the hydrogen production device and the ammonia synthesis device.

3. The data-physical interaction simulation system for deep-sea energy islands according to claim 1, characterized in that, The electrolytic hydrogen production equipment, ammonia synthesis equipment, and methanol synthesis equipment of the energy conversion module correspond to the hydrogen production module, ammonia synthesis module, and methanol synthesis module, respectively. In the hydrogen production module, an electrolyzer uses desalinated seawater to electrolyze water to produce hydrogen. A hydrogen compressor compresses the hydrogen and delivers it to a hydrogen storage tank to provide hydrogen for the synthesis of ammonia and methanol. In the ammonia synthesis module, a nitrogen compressor compresses nitrogen separated from the air and delivers it to the ammonia synthesis reactor along with the hydrogen in the hydrogen storage tank for reaction. After the product is cooled and condensed, it is separated, and the separated liquid ammonia is stored in an ammonia storage tank. In the methanol synthesis module, a CO2 compressor compresses the captured CO2 and delivers it to the alcohol synthesis reactor along with the hydrogen in the hydrogen storage tank for reaction. After the product is condensed and separated, crude methanol enters an alcohol distillation column for distillation and is stored in an alcohol storage tank. Finally, the generated liquid ammonia and methanol are transported by sea.

4. The data-physical interaction simulation system for deep-sea energy islands according to claim 1, characterized in that, Digital models were built on the Aspen Plus V12 process simulation platform, including hydrogen production, ammonia synthesis, and methanol processes; The basic method for setting physical properties in the hydrogen production process is ELECNRTL. The raw material H2O enters the stoichiometric reactor B1 and reacts according to the chemical reaction equation for hydrogen production by water electrolysis. The generated H2 and O2 enter the flash tank B2 for vapor-liquid separation. The mixed gas enters the component separator B3 to obtain H2. H2 passes through the splitter A1 to provide raw materials for the synthesis of ammonia and alcohol. The newly built process section of the ammonia synthesis process uses the PR-BM method for setting physical properties. H2 and N2 are split and passed through mixer A3 in a 3:1 ratio, then enter compressor B4 for compression. In stoichiometric reactor B5, they react according to the chemical reaction equation to generate a gas-liquid mixture that enters flash tank B6 to separate liquid ammonia. The newly constructed process section for methanol synthesis uses the NRTL-RK method for setting physical properties. H2 and CO2 are split and passed through mixer A2 in a 3:1 ratio, then enter compressor B7 for compression. In stoichiometric reactor B8, they react according to the chemical reaction equation to generate a gas-liquid mixture, which enters flash tank B9 to separate methanol and water-liquid phase mixture, and then enters distillation column B10 to separate methanol.

5. A data-physical interactive simulation system for deep-sea energy islands according to claim 1, characterized in that, It also includes auxiliary structures, which include an energy island model display base and pipelines for connecting the various modules.

6. A control method for a data-physical interactive simulation system for deep-sea energy islands, characterized in that, Based on the system as described in any one of claims 1-5, it includes: S1. Design and build a physical model of the deep-sea energy island system, including offshore wind, solar and wave power generation modules, hydrogen production and ammonia synthesis energy conversion modules, energy storage and power distribution modules and auxiliary structures. Install displays at key equipment locations on the model and connect the displays to a programmable controller. S2. Construct a digital model of the system on a process simulation platform, design a visual monitoring interface in computer graphics software, and establish a connection with the programmable controller. S3. Write a control program in the programmable controller to generate analog signals according to instructions, control the digital model to perform calculations, drive the display screen on the physical model, and receive data synchronously through the digital monitoring interface. S4. Input instructions into the digital monitoring interface, the programmable controller receives the instructions, controls the digital model to calculate and output data, synchronously updates the display screen and the digital monitoring interface, simulates the actual equipment response, and realizes two-way interaction between the control system and the physical model.

Images