Liquid hydrogen superconducting co-melting energy storage semi-physical simulation system

Abstract

The invention discloses a liquid hydrogen superconducting co-melting energy storage semi-physical simulation system which comprises a liquid hydrogen superconducting co-melting energy storage physical system, a real-time simulation machine and an upper computer. The liquid hydrogen superconducting co-melting energy storage physical system comprises a fuel cell device, a water electrolysis hydrogen production device and a liquid hydrogen cooling superconducting magnetic energy storage device. The fuel cell device is used for providing electric power supply for the electric power system; the water electrolysis hydrogen production device is used for converting electric energy into chemical energy to be stored in hydrogen; the liquid hydrogen cooling superconducting magnetic energy storage device is used for carrying out liquid hydrogen energy storage and superconducting magnetic energy storage; the real-time simulation machine is used for generating a control signal of the liquid hydrogen superconducting co-melting energy storage physical system according to the operation parameters of the liquid hydrogen superconducting co-melting energy storage physical system and the operation condition of the simulation renewable energy power generation system; and the upper computer is used for monitoring and managing the operation conditions of the real-time simulation machine and the liquid hydrogen cooling superconducting magnetic energy storage real object device. According to the invention, the accuracy and reliability of the simulation result can be improved.

Description

Technical Field

[0001] The present invention relates to the field of liquid hydrogen superconducting eutectic energy storage, and in particular to a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system. Background Art

[0002] The existing single energy storage technology is still difficult to simultaneously meet the needs of large-scale renewable energy generation for medium- and long-term energy storage and ultra-short-term power storage. For this reason, liquid hydrogen superconducting fusion energy storage that combines energy-type liquid hydrogen energy storage and power-type superconducting magnetic energy storage has been proposed. The liquid hydrogen superconducting fusion energy storage system uses liquid hydrogen as a large-scale long-term energy storage medium, and realizes the two-way interaction of electric-hydrogen energy through water electrolysis and fuel cell components; at the same time, it uses the characteristics of fast response and high energy storage power of superconducting magnetic energy storage to provide short-term power support for the power system. The system combines the advantages of energy-type and power-type energy storage, can smooth power fluctuations at various time scales, and improve overall energy efficiency. In addition, liquid hydrogen is also used as a cooling medium for superconducting magnets, avoiding the cost increase caused by providing liquid nitrogen or liquid helium refrigeration systems for superconducting magnets alone, and realizing the dual coupling of hybrid energy storage devices in energy and matter.

[0003] As a new type of composite energy storage concept, liquid hydrogen superconducting symmetric energy storage is still in its infancy at home and abroad. Most of the research uses computer simulation methods to conduct pure digital simulation research on this energy storage technology. By constructing mathematical models of various components such as liquid hydrogen energy storage, superconducting magnetic energy storage, water electrolysis hydrogen production, and fuel cells, the operation of the liquid hydrogen superconducting symmetric energy storage system under different working conditions is simulated by computer, such as different grid loads and different operating modes. Then, the performance indicators of the system are analyzed through simulation results, such as energy conversion efficiency, response time, temperature change, and energy loss.

[0004] However, the normal operation of key components such as liquid hydrogen energy storage, superconducting magnetic energy storage, water electrolysis to produce hydrogen, fuel cells, etc. is affected by the coupling of multiple physical fields such as electric field, temperature field, flow field, magnetic field, etc., and the influence of other auxiliary equipment of the entire industrial-grade system (cooling equipment, circulation pumps, etc.) must be taken into account. These influencing factors are difficult to simulate in pure digital simulation. The existing pure digital simulation model of liquid hydrogen superconducting eutectic energy storage system cannot well describe the operation of the system, affecting the accuracy and reliability of the simulation results. Summary of the invention

[0005] The present invention provides a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system to solve the technical problem that the existing pure digital simulation model of the liquid hydrogen superconducting eutectic energy storage system cannot well describe the operation of the system, thus affecting the accuracy and reliability of the simulation results.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system, including: a liquid hydrogen superconducting eutectic energy storage physical system, a real-time simulation machine and a host computer;

[0007] The liquid hydrogen superconducting eutectic energy storage physical system comprises: a fuel cell device, a water electrolysis hydrogen production device and a liquid hydrogen cooling superconducting magnetic energy storage device;

[0008] The real-time simulation machine is connected to the liquid hydrogen superconducting eutectic energy storage physical system and the host computer respectively;

[0009] The fuel cell device is used to convert hydrogen into electrical energy through electrochemical reaction to provide power supply for the power system when the power demand is at a peak;

[0010] The water electrolysis hydrogen production device is used to generate hydrogen through water electrolysis reaction when the power demand is low, and convert the surplus electrical energy of the power system into chemical energy and store it in hydrogen;

[0011] The liquid hydrogen cooled superconducting magnetic energy storage device is used for liquid hydrogen energy storage and superconducting magnetic energy storage, and cools the superconducting magnet according to the low temperature characteristics of liquid hydrogen, and then stores or releases electrical energy according to the liquid hydrogen and the cooled superconducting magnet;

[0012] The real-time simulator is used to simulate the renewable energy power generation system and obtain the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, and generate a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system;

[0013] The host computer is used to monitor and manage the operation of the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device.

[0014] As a preferred solution, the liquid hydrogen superconducting eutectic energy storage physical system further includes: a bidirectional controllable DC power supply, a liquid hydrogen storage tank and a controllable circulation pump;

[0015] The bidirectional controllable DC power supply is connected to the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device respectively;

[0016] The liquid hydrogen storage tank is connected to the liquid hydrogen cooled superconducting magnetic energy storage device through the controllable circulation pump; the controllable circulation pump is also connected to the real-time simulator;

[0017] The bidirectional controllable DC power supply is used to provide electrical energy to the superconducting magnet in the liquid hydrogen-cooled superconducting magnetic energy storage device, and to simulate the charging and discharging conditions of the superconducting magnet through bidirectional power supply;

[0018] The liquid hydrogen storage tank is used to store liquid hydrogen, and to replenish or store liquid hydrogen for the liquid hydrogen-cooled superconducting magnetic energy storage device through the controllable circulation pump;

[0019] The controllable circulation pump is used to control the bidirectional flow of liquid hydrogen between the liquid hydrogen storage tank and the liquid hydrogen-cooled superconducting magnetic energy storage device.

[0020] As a preferred embodiment, the operating parameters of the liquid hydrogen superconducting eutectic energy storage physical system include: the electrolysis voltage of the water electrolysis hydrogen production device, the electrolysis current of the water electrolysis hydrogen production device, the electrolysis temperature of the water electrolysis hydrogen production device, the voltage of the fuel cell device, the current of the fuel cell device, the flow rate of the fuel cell device, the liquid hydrogen level of the liquid hydrogen cooled superconducting magnetic energy storage device, the superconducting magnet current of the liquid hydrogen cooled superconducting magnetic energy storage device and the temperature of the liquid hydrogen cooled superconducting magnetic energy storage device.

[0021] As a preferred solution, the simulated renewable energy power generation system includes: a renewable energy power system simulation model, a hydrogen liquefaction and vaporization model, and a power conversion and control unit;

[0022] The renewable energy power system simulation model is used to provide the grid structure and load demand for the simulated renewable energy power generation system, and simulate the real-time operation status of the grid; wherein the real-time operation status includes: power generation, transmission, distribution and load changes of the grid;

[0023] The hydrogen liquefaction and vaporization simulation model is used to simulate the thermodynamic behavior and energy conversion of hydrogen during the liquefaction and vaporization process;

[0024] The power conversion and control unit is used to realize the energy conversion between the simulated renewable energy power generation system and the liquid hydrogen cooled superconducting magnetic energy storage physical system, and to manage the charging and discharging process in the hydrogen cooled superconducting magnetic energy storage device.

[0025] As a preferred solution, the simulation of the renewable energy power generation system includes:

[0026] Constructing a renewable energy power system infrastructure, and using wind speed and light as driving signals for the infrastructure, and then constructing a corresponding renewable energy power system simulation model; wherein the infrastructure includes: power grid topology, power generation units, transmission lines and loads;

[0027] Obtaining the energy conversion efficiency of hydrogen during the compression process, cooling process, liquefaction process and vaporization process, as well as the corresponding safety operation constraints, and constructing a corresponding hydrogen liquefaction and vaporization model according to the energy conversion efficiency and the safety constraints;

[0028] Constructing a corresponding converter unit, and simulating the energy transfer between the liquid hydrogen superconducting eutectic energy storage system and the power grid or load according to the converter unit, thereby generating a corresponding power conversion and control unit;

[0029] According to the renewable energy power system simulation model, the hydrogen liquefaction and vaporization model and the power conversion and control unit, a simulation of the renewable energy power generation system is performed to generate a corresponding simulated renewable energy power generation system.

[0030] As a preferred embodiment, the control signals of the liquid hydrogen superconducting eutectic energy storage system include: the hydrogen flow control signal of the fuel cell device, the electrolysis current control signal of the water electrolysis hydrogen production device, the current control signal of the controllable bidirectional DC power supply and the flow control signal of the bidirectional circulation pump.

[0031] As a preferred solution, the step of obtaining the operating parameters of the liquid hydrogen superconducting eutectic energy storage system and generating a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system includes:

[0032] According to the operation status of the simulated renewable energy power generation system, the difference between the total power generation power and the total load power in the simulated renewable energy power generation system is calculated, and the difference is used as the unbalanced power of the simulated renewable energy power generation system;

[0033] The unbalanced power is decomposed into a high-frequency power component and a low-frequency power component, and a control signal of the liquid hydrogen superconducting eutectic energy storage system is generated according to the high-frequency power component, the low-frequency power component and the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the liquid hydrogen superconducting eutectic energy storage system can smooth the high-frequency power component and the low-frequency power component according to the control signal.

[0034] As a preferred solution, the control signal of the liquid hydrogen superconducting eutectic energy storage system is generated according to the high-frequency power component, the low-frequency power component and the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the liquid hydrogen superconducting eutectic energy storage system can smooth the high-frequency power component and the low-frequency power component according to the control signal, including:

[0035] For the high-frequency power component, a first control signal of a controllable bidirectional DC power supply in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the controllable bidirectional DC power supply controls the charge and discharge current of the liquid hydrogen superconducting eutectic energy storage device according to the first control signal to smooth the high-frequency power component;

[0036] For the low-frequency power component, when grid power redundancy occurs in the simulated renewable energy power generation system, a second control signal of the water electrolysis hydrogen production device in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the water electrolysis hydrogen production device converts excess electrical energy into hydrogen according to the second control signal, thereby smoothing the low-frequency power component;

[0037] When a power shortage occurs in the simulated renewable energy power generation system, a third control signal of the fuel cell device in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, thereby smoothing the low-frequency power component.

[0038] As a preferred embodiment, after the water electrolysis hydrogen production device converts the excess electrical energy into hydrogen according to the second control signal, it also includes:

[0039] The actual hydrogen production in the water electrolysis hydrogen production device is obtained, and then a fourth control signal of the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage physical system is generated according to the actual hydrogen production, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fourth control signal, and transports the liquid hydrogen in the liquid hydrogen storage tank to the liquid hydrogen superconducting eutectic energy storage device.

[0040] As a preferred solution, after the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, it further includes:

[0041] The actual power generation in the fuel cell device is obtained, and then a fifth control signal of the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage system is generated according to the actual power generation, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fifth control signal, and transports the liquid hydrogen in the liquid hydrogen superconducting eutectic energy storage device to the liquid hydrogen storage tank.

[0042] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0043] The present invention provides a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system, comprising: a liquid hydrogen superconducting eutectic energy storage physical system, a real-time simulation machine and a host computer; the liquid hydrogen superconducting eutectic energy storage physical system comprises: a fuel cell device, a water electrolysis hydrogen production device and a liquid hydrogen cooled superconducting magnetic energy storage device; the real-time simulation machine is connected to the liquid hydrogen superconducting eutectic energy storage physical system and the host computer respectively; the fuel cell device is used to convert hydrogen into electrical energy through electrochemical reaction when the power demand is at a peak, so as to provide power supply for the power system; the water electrolysis hydrogen production device is used to generate hydrogen through water electrolysis reaction when the power demand is at a low point, so as to convert the surplus electrical energy of the power system into chemical energy; The electrical energy is stored in hydrogen; the liquid hydrogen cooled superconducting magnetic energy storage device is used for liquid hydrogen energy storage and superconducting magnetic energy storage, and the superconducting magnet is cooled according to the low temperature characteristics of liquid hydrogen, and then the electrical energy is stored or released according to the liquid hydrogen and the cooled superconducting magnet; the real-time simulator is used for simulating the renewable energy power generation system, and obtaining the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, and generating the control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating status of the simulated renewable energy power generation system; the host computer is used for monitoring and managing the operating status of the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device.

[0044] Compared with traditional purely digital simulation research, the present invention adds physical objects such as water electrolysis hydrogen production devices, fuel cell devices, and liquid hydrogen-cooled superconducting magnetic energy storage devices. By introducing these actual physical devices, the credibility and accuracy of the simulation experiment are greatly improved, ensuring that the simulation results are closer to the actual application scenarios, greatly narrowing the gap between simulation and actual operation, and providing reliable technical support for the development of future prototypes and actual engineering applications. In addition, the present invention greatly enhances the ability to analyze system responses under complex working conditions through a real-time simulation platform and a host computer, combined with the real-time collaborative interactive operation of physical devices. This semi-physical simulation method can not only verify the dynamic behavior of the system under different complex working conditions, better describe the operation of the system, and improve the accuracy and reliability of the simulation results, but also effectively reduce the time and cost of prototype development and improve the safety of system testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system provided by an embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of the structure of a liquid hydrogen cooled superconducting magnetic energy storage device. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] Embodiment 1

[0055] Please refer to Figure 1 , is a schematic structural diagram of a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system provided by an embodiment of the present invention, comprising: a liquid hydrogen superconducting eutectic energy storage physical system, a real-time simulation machine and a host computer;

[0056] The liquid hydrogen superconducting eutectic energy storage physical system comprises: a fuel cell device, a water electrolysis hydrogen production device and a liquid hydrogen cooling superconducting magnetic energy storage device;

[0057] The real-time simulation machine is connected to the liquid hydrogen superconducting eutectic energy storage physical system and the host computer respectively;

[0058] The fuel cell device is used to convert hydrogen into electrical energy through electrochemical reaction to provide power supply for the power system when the power demand is at a peak;

[0059] The water electrolysis hydrogen production device is used to generate hydrogen through water electrolysis reaction when the power demand is low, and convert the surplus electrical energy of the power system into chemical energy and store it in hydrogen;

[0060] The liquid hydrogen cooled superconducting magnetic energy storage device is used for liquid hydrogen energy storage and superconducting magnetic energy storage, and cools the superconducting magnet according to the low temperature characteristics of liquid hydrogen, and then stores or releases electrical energy according to the liquid hydrogen and the cooled superconducting magnet;

[0061] The real-time simulator is used to simulate the renewable energy power generation system and obtain the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, and generate a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system;

[0062] The host computer is used to monitor and manage the operation of the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device.

[0063] Preferably, the liquid hydrogen superconducting eutectic energy storage physical system also includes: a bidirectional controllable DC power supply, a liquid hydrogen storage tank and a controllable circulation pump; the bidirectional controllable DC power supply is respectively connected to the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device; the liquid hydrogen storage tank is connected to the liquid hydrogen cooled superconducting magnetic energy storage device through the controllable circulation pump; the controllable circulation pump is also connected to the real-time simulator; the bidirectional controllable DC power supply is used to provide electrical energy to the superconducting magnet in the liquid hydrogen cooled superconducting magnetic energy storage device, and simulate the charging and discharging conditions of the superconducting magnet through bidirectional power supply; the liquid hydrogen storage tank is used to store liquid hydrogen, and replenish or store liquid hydrogen for the liquid hydrogen cooled superconducting magnetic energy storage device through the controllable circulation pump; the controllable circulation pump is used to control the bidirectional flow of liquid hydrogen between the liquid hydrogen storage tank and the liquid hydrogen cooled superconducting magnetic energy storage device.

[0064] Specifically, in view of the defects existing in the prior art, the purpose of the present invention is to combine the RT-LAB real-time simulator with actual hardware to provide a semi-physical simulation platform and method for liquid hydrogen superconducting symmetric energy storage. The simulation platform is divided into a physical side and a digital side. The physical side includes key components such as liquid hydrogen storage tanks, hydrogen-cooled superconducting magnets, water electrolysis hydrogen production devices, fuel cell devices, and controllable bidirectional power supplies. Compared with pure digital simulation, the physical replacement of these key components in the liquid hydrogen superconducting symmetric energy storage system is conducive to improving the accuracy and reliability of the simulation, and can better reflect the interaction between the system and the external environment and its real-time dynamic characteristics. The digital side builds a simulation model for renewable energy power generation and the corresponding control strategy to improve the cost of building a pure physical platform. At the same time, different application scenarios can be flexibly set or simulation parameters can be modified through the digital side to improve the safety and flexibility of simulation experiments.

[0065] The physical side and the digital side establish communication to realize real-time two-way interaction of signals, thereby realizing real-time simulation and simulating real scenes. At the same time, the experimental parameters of the physical side water electrolysis hydrogen production, fuel cells and superconducting magnets, liquid hydrogen characteristic parameters, etc. can be collected to provide data support for the testing and optimization of liquid hydrogen superconducting symmetric energy storage systems. Through this simulation platform, the performance of liquid hydrogen superconducting symmetric energy storage systems under different working conditions can be flexibly evaluated, and its potential advantages and problems in different application scenarios can be explored, thus providing important references for the design and practical application of liquid hydrogen superconducting symmetric energy storage systems.

[0066] In order to achieve the above technical objectives, the present invention provides a semi-physical simulation platform and method for liquid hydrogen superconducting eutectic energy storage. The platform uses the RT-LAB real-time simulator to construct a semi-physical simulation platform that integrates liquid hydrogen-cooled superconducting magnets, water electrolysis hydrogen production devices, fuel cell devices and their supporting components. Through the high-speed solution capability and real-time flexible control characteristics of RT-LAB, the platform can more realistically simulate the operating characteristics of liquid hydrogen superconducting eutectic energy storage devices in a variety of operating scenarios, significantly improve the reliability of simulation results, effectively reduce investment costs, and shorten the R&D cycle, thereby providing an advanced a priori testing platform for the design, verification and optimization of future prototypes, further promoting the rapid development of liquid hydrogen superconducting energy storage technology, and accelerating its implementation in practical applications.

[0067] Liquid hydrogen superconducting eutectic energy storage semi-physical simulation platform Figure 1 As shown, it mainly includes: a fuel cell device (1), a water electrolysis hydrogen production device (2), a bidirectional controllable DC power supply (3), a liquid hydrogen storage tank (4), a controllable circulation pump (5), a liquid hydrogen cooling superconducting magnetic energy storage device (6), an RT-LAB real-time simulator and a host computer. The fuel cell device (1), the water electrolysis hydrogen production device (2) and the liquid hydrogen cooling superconducting magnetic energy storage device (6) together constitute a liquid hydrogen superconducting eutectic energy storage physical system (7).

[0068] The fuel cell device (1) is used to convert hydrogen into electrical energy through an electrochemical reaction, and to provide power supply when the power demand is at a peak; the water electrolysis hydrogen production device (2) generates hydrogen through a water electrolysis reaction, and when the power demand is at a low point, the surplus electrical energy of the power system is converted into chemical energy and stored in hydrogen; the bidirectional controllable DC power supply (3) is used to provide electrical energy to the superconducting magnet (21), and the charging and discharging conditions of the superconducting magnet are simulated through bidirectional power supply; the liquid hydrogen storage tank (4) is used to store liquid hydrogen, and is used to replenish or transfer the liquid hydrogen for cooling the superconducting magnetic energy storage device (6); the controllable circulating pump (5) is used to control the liquid hydrogen in the liquid hydrogen storage tank (4) and The liquid hydrogen-cooled superconducting magnetic energy storage device (6) has a two-way flow between the two devices; the liquid hydrogen-cooled superconducting magnetic energy storage device (6) combines liquid hydrogen energy storage and superconducting magnetic energy storage, and uses the low temperature characteristics of liquid hydrogen to cool the superconducting magnet to achieve efficient electric energy storage and release, and is the core of the entire liquid hydrogen superconducting eutectic energy storage semi-physical simulation platform; the RT-LAB real-time simulator is used to perform real-time simulation and control of the system, simulate and replace the power system, hydrogen liquefaction / vaporization device and power conversion and controller that are difficult to achieve in the real object; the host computer is used to monitor and manage the entire simulation platform, and provides a human-computer interaction interface to facilitate operators to control the system and analyze data.

[0069] Preferably, the simulated renewable energy power generation system includes: a renewable energy power system simulation model, a hydrogen liquefaction and vaporization model, and a power conversion and control unit; the renewable energy power system simulation model is used to provide the simulated renewable energy power generation system with a grid structure and load demand, and simulate the real-time operation state of the grid; wherein the real-time operation state includes: power generation, transmission, distribution and load changes of the grid; the hydrogen liquefaction and vaporization simulation model is used to simulate the thermodynamic behavior and energy conversion of hydrogen during the liquefaction and vaporization process; the power conversion and control unit is used to realize the energy conversion between the simulated renewable energy power generation system and the liquid hydrogen-cooled superconducting magnetic energy storage physical system, and manage the charging and discharging process in the hydrogen-cooled superconducting magnetic energy storage device.

[0070] Preferably, the simulation of the renewable energy power generation system includes: constructing an infrastructure of the renewable energy power system, and using wind speed and light as driving signals of the infrastructure, thereby constructing a corresponding renewable energy power system simulation model; wherein the infrastructure includes: power grid topology, power generation units, transmission lines and loads; obtaining the energy conversion efficiency of hydrogen in the compression process, cooling process, liquefaction process and vaporization process, and the corresponding safety operation constraints, and constructing a corresponding hydrogen liquefaction and vaporization model according to the energy conversion efficiency and the safety constraints; constructing a corresponding converter unit, and simulating the energy transfer between the liquid hydrogen superconducting eutectic energy storage system and the power grid or load according to the converter unit, thereby generating a corresponding power conversion and control unit; according to the renewable energy power system simulation model, the hydrogen liquefaction and vaporization model and the power conversion and control unit, the simulation of the renewable energy power generation system is performed to generate a corresponding simulated renewable energy power generation system.

[0071] Specifically, the RT-LAB real-time simulator has high-performance parallel computing and I / O management capabilities, up to 64 analog or 128 digital I / O channels, and its I / O is modular and flexible, and can be customized according to demand to meet specific I / O needs. It builds a simulation model of a renewable energy power system with a high proportion of new energy, a hydrogen liquefaction / vaporization model, and a power conversion and control model of a liquid hydrogen superconducting eutectic energy storage system based on MATLAB / Simu link, and loads them into RT-LAB for real-time simulation operation, replacing the real power system, hydrogen liquefaction / vaporization device, and power conversion and controller.

[0072] In terms of specific construction methods, the simulation model of renewable energy power system: the Simscape Power Systems module in Simu Link is used to build the basic architecture of the power system, including grid topology, power generation units (wind power, photovoltaic, etc.), transmission lines and loads. The modeling of the new energy part needs to take into account its intermittent and fluctuating characteristics, and use appropriate external inputs such as wind speed and light as driving signals; hydrogen liquefaction / vaporization model: based on the energy conversion efficiency of hydrogen compression, cooling, liquefaction and vaporization processes, and considering the safe operation constraints of the hydrogen liquefaction / vaporization device, a hydrogen liquefaction / vaporization model is constructed; power conversion and control unit: an AC / DC converter unit is constructed to accurately describe the bidirectional conversion of energy and simulate the energy transfer between the liquid hydrogen superconducting eutectic energy storage system and the power grid or load.

[0073] In terms of specific functions, the renewable energy power system simulation model: provides the grid structure and load demand of the entire system, simulates the real-time operation status of the grid, including power generation, transmission, distribution and load changes, and verifies the performance of the liquid hydrogen superconducting eutectic energy storage system under different operating conditions; hydrogen liquefaction / vaporization model: simulates the thermodynamic behavior and energy conversion during the liquefaction and vaporization of hydrogen, verifies the efficiency and safety of the hydrogen liquefaction and vaporization process, ensures the stability and energy efficiency of the liquid hydrogen storage system under various working conditions, and considers the energy requirements during cooling and heating; power conversion and control unit: realizes energy conversion between the power system and the hydrogen energy storage system, and manages the charging and discharging process of the liquid hydrogen energy storage unit and the superconducting magnetic energy storage unit.

[0074] Preferably, the operating parameters of the liquid hydrogen superconducting eutectic energy storage physical system include: the electrolysis voltage of the water electrolysis hydrogen production device, the electrolysis current of the water electrolysis hydrogen production device, the electrolysis temperature of the water electrolysis hydrogen production device, the voltage of the fuel cell device, the current of the fuel cell device, the flow rate of the fuel cell device, the liquid hydrogen level of the liquid hydrogen cooled superconducting magnetic energy storage device, the superconducting magnet current of the liquid hydrogen cooled superconducting magnetic energy storage device and the temperature of the liquid hydrogen cooled superconducting magnetic energy storage device.

[0075] Preferably, the control signals of the liquid hydrogen superconducting eutectic energy storage system include: a hydrogen flow control signal of the fuel cell device, an electrolysis current control signal of the water electrolysis hydrogen production device, a current control signal of the controllable bidirectional DC power supply, and a flow control signal of the bidirectional circulation pump.

[0076] Specifically, in terms of signal transmission, the RT-LAB real-time simulator establishes TCP / IP (16) communication with the host computer through a network cable. The RT-LAB internally integrates analog input (AI, analog input) and analog output (AO, analog output) boards. The analog input boards input the measurement feedback signals of the water electrolysis hydrogen production device, the fuel cell device and the hydrogen-cooled superconducting magnetic energy storage device, corresponding to (8), (9) and (15) respectively. The measured physical quantity is converted into a standard analog voltage signal of 0 to 10 V through the corresponding sensor, and then transmitted to the interface between the physical device and the RT-LAB real-time simulator through the signal transmission line. The analog signal is converted into a digital signal through an analog input card (A / D converter) for processing and use by the simulation system; the analog output card outputs control signals for the fuel cell device, the water electrolysis hydrogen production device, the bidirectional controllable DC power supply and the bidirectional circulation pump, corresponding to (10), (11), (12) and (13) respectively. After the control signal is generated by the simulation system, it is converted into a standard analog voltage signal of 0 to 10V through the analog output card, and then transmitted to the physical device through the signal transmission line, and finally controls the operation of the physical device. Specifically, (8) corresponds to the electrolysis voltage, current, temperature and other signals of the water electrolysis hydrogen production device, (9) corresponds to the voltage, current and flow rate and other signals of the fuel cell device, (15) corresponds to the liquid hydrogen level, superconducting magnet current, temperature and other signals, (10) corresponds to the hydrogen flow control signal of the fuel cell device, (11) corresponds to the electrolysis current control signal of the water electrolysis hydrogen production device, (12) corresponds to the current control signal of the controllable bidirectional DC power supply, (13) corresponds to the flow control signal of the bidirectional circulation pump, and (14) corresponds to the power supply current of the superconducting magnet. All the above control and measurement signals can be displayed and recorded in real time by the host computer. The host computer can not only intuitively display the real-time status of each key parameter, but also continuously record the change trend and historical data of these signals, providing comprehensive support for system monitoring and analysis, ensuring the visual management of operations, and providing an important basis for subsequent performance optimization and fault diagnosis.

[0077] Preferably, the obtaining of the operating parameters of the physical liquid hydrogen superconducting eutectic energy storage system and generating a control signal of the physical liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system include: calculating the difference between the total power generation power and the total load power in the simulated renewable energy power generation system according to the operating conditions of the simulated renewable energy power generation system, and using the difference as the unbalanced power of the simulated renewable energy power generation system; decomposing the unbalanced power into a high-frequency power component and a low-frequency power component, and generating a control signal of the physical liquid hydrogen superconducting eutectic energy storage system according to the high-frequency power component, the low-frequency power component and the operating parameters of the physical liquid hydrogen superconducting eutectic energy storage system, so that the physical liquid hydrogen superconducting eutectic energy storage system smoothes the high-frequency power component and the low-frequency power component according to the control signal.

[0078] Preferably, the control signal of the liquid hydrogen superconducting eutectic energy storage system is generated according to the high-frequency power component, the low-frequency power component and the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the liquid hydrogen superconducting eutectic energy storage system can smooth the high-frequency power component and the low-frequency power component according to the control signal, including: for the high-frequency power component, according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, a first control signal of a controllable bidirectional DC power supply in the liquid hydrogen superconducting eutectic energy storage system is generated, so that the controllable bidirectional DC power supply controls the charge and discharge current of the liquid hydrogen superconducting eutectic energy storage device according to the first control signal to smooth the high-frequency power component; for the low-frequency power component, When grid power redundancy occurs in the simulated renewable energy power generation system, a second control signal is generated for the water electrolysis hydrogen production device in the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters of the physical liquid hydrogen superconducting eutectic energy storage system, so that the water electrolysis hydrogen production device converts excess electrical energy into hydrogen according to the second control signal, and smoothes the low-frequency power component; when grid power shortage occurs in the simulated renewable energy power generation system, a third control signal is generated for the fuel cell device in the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters of the physical liquid hydrogen superconducting eutectic energy storage system, so that the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, and smoothes the low-frequency power component.

[0079] Preferably, after the water electrolysis hydrogen production device converts excess electrical energy into hydrogen according to the second control signal, it also includes: obtaining the actual hydrogen production in the water electrolysis hydrogen production device, and then generating a fourth control signal for the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage system according to the actual hydrogen production, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fourth control signal, and transports the liquid hydrogen in the liquid hydrogen storage tank to the liquid hydrogen superconducting eutectic energy storage device.

[0080] Preferably, after the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, it also includes: obtaining the actual power generation in the fuel cell device, and then generating a fifth control signal for the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage system according to the actual power generation, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fifth control signal, and transports the liquid hydrogen in the liquid hydrogen superconducting eutectic energy storage device to the liquid hydrogen storage tank.

[0081] Specifically, the semi-physical simulation platform realistically simulates the main operation of the liquid hydrogen superconducting eutectic energy storage prototype through the three core devices of the fuel cell device (1), the water electrolysis hydrogen production device (2) and the liquid hydrogen cooled superconducting magnetic energy storage device (6) and their supporting components. Considering the high cost, huge time consumption and relatively low safety of the physical manufacturing of the new power system with a high proportion of new energy, the hydrogen liquefaction / vaporization device and the power conversion and control module, these parts are constructed on the RT-LAB real-time simulation platform in the form of digital models. Through the real-time solution function of the platform, the digital model can accurately control the coordinated operation of the physical device, which not only greatly improves the economy and safety of the simulation, but also provides an efficient and reliable verification method for the development of future actual prototypes.

[0082] The simulation method of this platform is as follows:

[0083] First, a TCP / IP communication (16) is established between the RT-LAB real-time simulator and the host computer to achieve a stable connection between the two. Using the host computer software, a simulation model of a new power system with a high proportion of new energy, a hydrogen liquefaction / vaporization device, and a power conversion and control module is constructed in the RT-LAB real-time simulator, and the corresponding input and output signal interfaces are configured. The power measurement module in Simu link is used to calculate the difference between the generated power and the load power in real time. Specifically, a power sensor is used to measure the power output and input of each component, and the difference between the total generated power and the total load power is calculated to obtain the unbalanced power (i.e., the difference between the generated power and the load). The unbalanced power of the system is filtered to decompose into high-frequency and low-frequency components, of which the high-frequency component is borne by the superconducting magnetic energy storage system and the low-frequency component is borne by the liquid hydrogen energy storage system. Since the carrying capacity of superconducting magnetic energy storage and liquid hydrogen energy storage is limited by the current system state, it is necessary to collect state signals (such as temperature, liquid level, etc.) in real time to evaluate the actual carrying capacity of each energy storage unit. Combined with these status signals, the simulation part will generate reasonable control signals to effectively distribute unbalanced power and accurately regulate the operating status of external components to ensure stable operation of the system and optimal utilization of energy storage resources.

[0084] Because superconducting magnets have extremely fast response speeds and high power density, they can store and release electrical energy in milliseconds. Therefore, when high-frequency power imbalance occurs in the power grid or system, superconducting magnets can quickly absorb or release electrical energy, smooth power fluctuations, and maintain stable operation of the system. The process of mutual conversion between electrical energy and hydrogen energy is relatively slow, and liquid hydrogen energy storage systems are suitable for handling low-frequency unbalanced power. Liquid hydrogen energy storage systems have high energy density and can store large amounts of energy for a long time, making them suitable for handling long-term power imbalances and large-scale energy storage needs.

[0085] For superconducting magnets, temperature is an important indicator because the performance of superconducting magnets is highly dependent on their operating temperature. By monitoring the temperature, it is possible to determine whether the superconducting magnet is in the best working state. If the temperature is too high, its carrying capacity will decrease. In addition, real-time monitoring of current and voltage can also evaluate the instantaneous power output capacity and current energy storage status of the superconducting magnet. For liquid hydrogen energy storage systems, the liquid level directly reflects the storage capacity of liquid hydrogen, thereby evaluating the available energy reserves.

[0086] The unbalanced power is decomposed into high-frequency components and low-frequency components by filtering. Next, the corresponding control signal is generated according to the filtered power components to adjust the output power of each energy storage unit. For superconducting magnets, the control signal will adjust its charging and discharging power to cope with high-frequency fluctuations; for liquid hydrogen energy storage systems, the control signal will adjust the operating power of fuel cell devices and water electrolysis hydrogen production devices to cope with low-frequency fluctuations.

[0087] In the power system simulation, in order to cope with high-frequency rapid power fluctuations, the operation of the controllable bidirectional DC power supply (3) is adjusted by sending control signals, thereby controlling the charging and discharging currents of the superconducting magnetic energy storage device to simulate its smoothing effect on high-frequency power fluctuations. With its high power density and rapid response capability, the superconducting magnetic energy storage device can effectively buffer these power fluctuations in a short time and maintain system stability.

[0088] For low-frequency power fluctuations in the power system, when power redundancy occurs in the power grid (i.e., power generation exceeds load demand), the operation of the water electrolysis hydrogen production device is controlled by signal (11) to convert excess electrical energy into hydrogen. The water electrolysis hydrogen production reaction equation is:

[0089]

[0090] Subsequently, based on the actual hydrogen production collected by signal (8), signal (13) is adjusted to control the flow rate of the bidirectional circulation pump, so that the liquid hydrogen in the liquid hydrogen storage tank (4) is transported to the liquid hydrogen cooled superconducting magnetic energy storage device (6). This process simulates the process of a hydrogen liquefaction device liquefying hydrogen and storing it in a liquid hydrogen cooled superconducting magnetic energy storage device, further improving the energy storage and regulation capabilities of the system.

[0091] In the power system, when low-frequency power fluctuations occur and the power shortage of the power grid occurs (i.e., the power generation is lower than the load demand), the operation of the fuel cell device is controlled by signal (10) to convert the stored hydrogen into electrical energy to supplement the power shortage in the simulated power system. The fuel cell is a device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis to produce hydrogen. Hydrogen and oxygen are supplied to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases free electrons and transmits through the external circuit to generate electrical energy. The reaction equation of the hydrogen fuel cell is:

[0092] 2H2+O2→2H2O (2)

[0093] According to the actual power generation collected by signal (9), the compensation amount is accurately adjusted to ensure the stable operation of the system. At the same time, according to the actual hydrogen demand, the flow rate of the two-way circulation pump is controlled by adjusting signal (13) to transport the liquid hydrogen in the liquid hydrogen cooled superconducting magnetic energy storage device (6) to the liquid hydrogen storage tank (4). This process simulates the process of liquid hydrogen vaporization device vaporizing liquid hydrogen into hydrogen, providing a continuous supply of hydrogen for the fuel cell to ensure its efficient operation. This process effectively simulates the response mechanism of the liquid hydrogen superconducting eutectic energy storage system in response to power shortages in the power grid, reflecting its key role in balancing power and stabilizing power supply in the power system.

[0094] Please refer to Figure 2, is a schematic diagram of the structure of a liquid hydrogen cooled superconducting magnetic energy storage device. The specific structure of the liquid hydrogen cooled superconducting magnetic energy storage device, which is the core component of the semi-physical simulation platform, mainly includes: a cryogenic liquid level transmitter (17), a high-precision digital current source (18), a cryogenic temperature sensor (19), liquid hydrogen (20), a superconducting magnet (21), an adiabatic dewar (22) and an aviation connector (23). Specifically, the cryogenic liquid level transmitter (17) needs to have an accuracy level of more than 1.0 and be able to withstand an ultra-low temperature environment of 20K. It is specially used to measure the liquid level height of liquid hydrogen in the adiabatic dewar. In order to ensure that the superconducting magnet is always immersed in liquid hydrogen and prevent the occurrence of quenching, the lowest liquid level of liquid hydrogen must always be higher than the height of the superconducting magnet. The cryogenic temperature sensor (19) uses a DT64 silicon diode temperature sensor, and the temperature measurement range covers 4 to 325K. Four temperature sensors are arranged inside the device to monitor the hydrogen temperature above the liquid surface, the liquid hydrogen temperature below the liquid surface, the surface temperature of the superconducting magnet, and the temperature at the bottom of the liquid hydrogen from top to bottom, respectively, to provide all-round temperature monitoring to ensure the safe and stable operation of the device. A high-precision digital current source (18) is used to provide a precise excitation current of 10μA for the low-temperature temperature sensor. It should be noted that an independent current channel must be set for each temperature sensor, and the four temperature sensors cannot be used in series to avoid affecting the accuracy of the current output, thereby ensuring the accuracy of the temperature measurement. The above-mentioned liquid level, temperature, and current of the superconducting magnet are all converted into analog signals and input into the RT-LAB real-time simulator for control feedback and data result analysis.

[0095] It can be seen that the present invention provides a liquid hydrogen superconducting eutectic energy storage semi-physical simulation system, through which the following beneficial effects can be achieved:

[0096] (1) This invention constructs a semi-physical simulation platform for a liquid hydrogen superconducting eutectic energy storage system. Compared with traditional pure digital simulation research, it adds key equipment - water electrolysis hydrogen production device, fuel cell device and liquid hydrogen cooled superconducting magnetic energy storage device and its supporting component integration. By introducing these actual physical devices, the credibility and accuracy of the simulation experiment are greatly improved, ensuring that the simulation results are closer to the real application scenarios, greatly narrowing the gap between simulation and actual operation, thereby providing reliable technical support for the development of future prototypes and actual engineering applications;

[0097] (2) The present invention uses the RT-LAB real-time simulation platform to achieve digital simulation of high-proportion new energy power systems, hydrogen liquefaction / vaporization devices, and power conversion and control modules, and combines the real-time collaborative interactive operation of physical devices to greatly enhance the ability to analyze system responses under complex working conditions. This semi-physical simulation method can not only verify the dynamic behavior of the system under different complex working conditions, but also effectively reduce the time and cost of prototype development and improve the safety of system testing;

[0098] (3) It can realize the dynamic selection and monitoring of key parameter variables of the physical side water electrolysis hydrogen production device, fuel cell device and liquid hydrogen cooled superconducting magnetic energy storage device during real-time operation, and dynamically adjust the model parameters on the digital side, providing a practical basis for actual engineering design;

[0099] (4) The multi-module scalable characteristics of the semi-physical simulation platform based on the RT-LAB real-time simulator provide greater flexibility and scalability for the subsequent test research and prototype development of the present invention. Simulation modules can be flexibly added or adjusted according to actual needs, so as to quickly adapt to different test requirements and research directions. This high scalability not only helps to accelerate the verification and optimization of new functions, but also can expand the capabilities of the simulation system without increasing hardware investment, laying a solid foundation for future large-scale applications.

[0100] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A liquid hydrogen superconducting eutectic energy storage semi-physical simulation system, characterized in that: include: Liquid hydrogen superconducting eutectic energy storage physical system, real-time simulator and host computer; The liquid hydrogen superconducting eutectic energy storage physical system comprises: a fuel cell device, a water electrolysis hydrogen production device and a liquid hydrogen cooling superconducting magnetic energy storage device; The real-time simulation machine is connected to the liquid hydrogen superconducting eutectic energy storage physical system and the host computer respectively; The fuel cell device is used to convert hydrogen into electrical energy through electrochemical reaction to provide power supply for the power system when the power demand is at a peak; The water electrolysis hydrogen production device is used to generate hydrogen through water electrolysis reaction when the power demand is low, and convert the surplus electrical energy of the power system into chemical energy and store it in hydrogen; The liquid hydrogen cooled superconducting magnetic energy storage device is used for liquid hydrogen energy storage and superconducting magnetic energy storage, and cools the superconducting magnet according to the low temperature characteristics of liquid hydrogen, and then stores or releases electrical energy according to the liquid hydrogen and the cooled superconducting magnet; The real-time simulator is used to simulate the renewable energy power generation system and obtain the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, and generate a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system; The host computer is used to monitor and manage the operation of the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device.

2. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 1, characterized in that: The liquid hydrogen superconducting eutectic energy storage physical system also includes: a bidirectional controllable DC power supply, a liquid hydrogen storage tank and a controllable circulation pump; The bidirectional controllable DC power supply is connected to the real-time simulator and the liquid hydrogen cooled superconducting magnetic energy storage device respectively; The liquid hydrogen storage tank is connected to the liquid hydrogen cooled superconducting magnetic energy storage device through the controllable circulation pump; the controllable circulation pump is also connected to the real-time simulator; The bidirectional controllable DC power supply is used to provide electrical energy to the superconducting magnet in the liquid hydrogen-cooled superconducting magnetic energy storage device, and to simulate the charging and discharging conditions of the superconducting magnet through bidirectional power supply; The liquid hydrogen storage tank is used to store liquid hydrogen, and to replenish or store liquid hydrogen for the liquid hydrogen-cooled superconducting magnetic energy storage device through the controllable circulation pump; The controllable circulation pump is used to control the bidirectional flow of liquid hydrogen between the liquid hydrogen storage tank and the liquid hydrogen-cooled superconducting magnetic energy storage device.

3. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 2, characterized in that: The operating parameters of the liquid hydrogen superconducting eutectic energy storage physical system include: the electrolysis voltage of the water electrolysis hydrogen production device, the electrolysis current of the water electrolysis hydrogen production device, the electrolysis temperature of the water electrolysis hydrogen production device, the voltage of the fuel cell device, the current of the fuel cell device, the flow rate of the fuel cell device, the liquid hydrogen level of the liquid hydrogen cooled superconducting magnetic energy storage device, the superconducting magnet current of the liquid hydrogen cooled superconducting magnetic energy storage device and the temperature of the liquid hydrogen cooled superconducting magnetic energy storage device.

4. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 3, characterized in that: The simulated renewable energy power generation system comprises: a renewable energy power system simulation model, a hydrogen liquefaction and vaporization model, and a power conversion and control unit; The renewable energy power system simulation model is used to provide the grid structure and load demand for the simulated renewable energy power generation system, and simulate the real-time operation status of the grid; wherein the real-time operation status includes: power generation, transmission, distribution and load changes of the grid; The hydrogen liquefaction and vaporization simulation model is used to simulate the thermodynamic behavior and energy conversion of hydrogen during the liquefaction and vaporization process; The power conversion and control unit is used to realize the energy conversion between the simulated renewable energy power generation system and the liquid hydrogen cooled superconducting magnetic energy storage physical system, and to manage the charging and discharging process in the hydrogen cooled superconducting magnetic energy storage device.

5. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 4, characterized in that: The simulation of the renewable energy power generation system comprises: Constructing a renewable energy power system infrastructure, and using wind speed and light as driving signals for the infrastructure, and then constructing a corresponding renewable energy power system simulation model; wherein the infrastructure includes: power grid topology, power generation units, transmission lines and loads; Obtaining the energy conversion efficiency of hydrogen during the compression process, cooling process, liquefaction process and vaporization process, as well as the corresponding safety operation constraints, and constructing a corresponding hydrogen liquefaction and vaporization model according to the energy conversion efficiency and the safety constraints; Constructing a corresponding converter unit, and simulating the energy transfer between the liquid hydrogen superconducting eutectic energy storage system and the power grid or load according to the converter unit, thereby generating a corresponding power conversion and control unit; According to the renewable energy power system simulation model, the hydrogen liquefaction and vaporization model and the power conversion and control unit, a simulation of the renewable energy power generation system is performed to generate a corresponding simulated renewable energy power generation system.

6. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 5, characterized in that: The control signals of the liquid hydrogen superconducting eutectic energy storage physical system include: the hydrogen flow control signal of the fuel cell device, the electrolysis current control signal of the water electrolysis hydrogen production device, the current control signal of the controllable bidirectional DC power supply and the flow control signal of the bidirectional circulation pump.

7. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 6, characterized in that: The obtaining of the operating parameters of the liquid hydrogen superconducting eutectic energy storage system and generating a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the operating parameters and the operating conditions of the simulated renewable energy power generation system include: According to the operation status of the simulated renewable energy power generation system, the difference between the total power generation power and the total load power in the simulated renewable energy power generation system is calculated, and the difference is used as the unbalanced power of the simulated renewable energy power generation system; The unbalanced power is decomposed into a high-frequency power component and a low-frequency power component, and a control signal of the liquid hydrogen superconducting eutectic energy storage system is generated according to the high-frequency power component, the low-frequency power component and the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the liquid hydrogen superconducting eutectic energy storage system can smooth the high-frequency power component and the low-frequency power component according to the control signal.

8. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 7, characterized in that: The step of generating a control signal of the liquid hydrogen superconducting eutectic energy storage system according to the high-frequency power component, the low-frequency power component and the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the liquid hydrogen superconducting eutectic energy storage system smoothes the high-frequency power component and the low-frequency power component according to the control signal, comprises: For the high-frequency power component, a first control signal of a controllable bidirectional DC power supply in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the controllable bidirectional DC power supply controls the charge and discharge current of the liquid hydrogen superconducting eutectic energy storage device according to the first control signal to smooth the high-frequency power component; For the low-frequency power component, when grid power redundancy occurs in the simulated renewable energy power generation system, a second control signal of the water electrolysis hydrogen production device in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the water electrolysis hydrogen production device converts excess electrical energy into hydrogen according to the second control signal, thereby smoothing the low-frequency power component; When a power shortage occurs in the simulated renewable energy power generation system, a third control signal of the fuel cell device in the liquid hydrogen superconducting eutectic energy storage system is generated according to the operating parameters of the liquid hydrogen superconducting eutectic energy storage system, so that the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, thereby smoothing the low-frequency power component.

9. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 8, characterized in that: After the water electrolysis hydrogen production device converts the excess electrical energy into hydrogen according to the second control signal, the device further includes: The actual hydrogen production in the water electrolysis hydrogen production device is obtained, and then a fourth control signal of the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage physical system is generated according to the actual hydrogen production, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fourth control signal, and transports the liquid hydrogen in the liquid hydrogen storage tank to the liquid hydrogen superconducting eutectic energy storage device.

10. The liquid hydrogen superconducting eutectic energy storage semi-physical simulation system according to claim 8, characterized in that: After the fuel cell device converts the stored hydrogen into electrical energy according to the third control signal, the method further comprises: The actual power generation in the fuel cell device is obtained, and then a fifth control signal of the bidirectional circulation pump in the liquid hydrogen superconducting eutectic energy storage system is generated according to the actual power generation, so that the bidirectional circulation pump adjusts the flow rate of liquid hydrogen transportation according to the fifth control signal, and transports the liquid hydrogen in the liquid hydrogen superconducting eutectic energy storage device to the liquid hydrogen storage tank.

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