Electro-hydrogen energy supply system information model based on CIM model expansion

Abstract

The invention belongs to the technical field of electric power system information models, and discloses an electric hydrogen energy supply system information model based on CIM model expansion so as to solve the problem of limitation of an existing model. The establishment of the model comprises the following steps: analyzing coupling and conversion paths among energy flows of electricity, heat, hydrogen and methanol in the electricity-hydrogen energy supply system, determining entity types of energy equipment contained in the electricity-hydrogen energy supply system, and abstracting corresponding new types; based on a common information model (CIM) and an expansion principle specified by the IEC61970 series standard, establishing a relationship between each new class and an original class in the CIM by adopting an inheritance mode, and establishing an interaction relationship between the new classes through a correlation and / or aggregation mode based on an energy coupling relationship obtained by analysis, so as to preliminarily establish a basic information model of the electricity-hydrogen energy supply system; and abstracting corresponding attributes and characteristic curves for each new class on the basis of configuration operation parameters of an electricity-hydrogen energy supply system entity so as to expand the basic information model.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system information models, and in particular relates to an electric hydrogen energy supply system information model based on the CIM model expansion. Background Art

[0002] The Common Information Model (CIM) is a standardized abstract data model for the power and energy sector. As the core of standard protocols such as IEC61970 and IEC61968, it uses object-oriented modeling to abstract entities and relationships within power systems, such as generators, transformers, and lines, into unified classes and attributes, forming a comprehensive data definition encompassing static topology and dynamic data. Its core goal is to achieve a shared understanding of power resources across different systems through the use of common terminology and object structures. Its modular design supports expansion, breaking down data silos and ensuring data consistency and interoperability. This provides fundamental support for grid dispatch automation, cross-system integration, and the integration of new devices.

[0003] Hydrogen, with its clean, efficient, and storable properties, has become a key energy carrier in multi-energy complementary systems, driving the rapid development of electric-hydrogen energy supply systems. By integrating multiple energy conversion devices, such as water electrolysis for hydrogen production, fuel cell power generation, and chemical energy storage, these systems achieve the coordinated optimization and efficient utilization of multiple energy sources, including electricity, hydrogen, and thermal energy.

[0004] However, the complex integrated architecture of the electric-hydrogen energy supply system poses significant challenges to information management. The various energy conversion devices (such as electrolyzers, fuel cells, and trigeneration units) and energy storage devices (such as solid-gas hybrid hydrogen storage and electrochemical energy storage) within the system come from different manufacturers and utilize heterogeneous data structures and communication protocols, leading to severe information silos within the system. This data exchange barrier not only hinders the coordinated optimization and control of multiple energy flows but also limits improvements in overall system operational efficiency. While the CIM model proposed in the existing IEC61970 series of standards provides a unified data modeling framework for power systems, its core model primarily targets traditional power equipment and lacks standardized descriptions of key energy-coupled devices in the electric-hydrogen energy supply system. Specifically, it excludes class definitions for novel energy conversion devices such as hydrogen electrolyzers and fuel cells; lacks modeling methods for multiple energy-coupled relationships; and lacks standardized interaction parameters between the energy storage system and energy conversion devices. These model limitations make interoperability between devices in the electric-hydrogen energy supply system difficult, severely restricting the system's intelligent management capabilities and development potential. Summary of the Invention

[0005] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an electric-hydrogen energy supply system information model based on the CIM model expansion that meets one or more of the above-mentioned needs, so as to achieve the goal of enhancing the versatility of the electric-hydrogen energy supply system information model, optimizing its scalability, making the architecture clearer, and improving practicality and accuracy.

[0006] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions: The present invention provides an electric hydrogen energy supply system information model based on the CIM model expansion, and the establishment of the electric hydrogen energy supply system information model includes the following steps: S1. Analyze the coupling and conversion paths among the energy flows of electricity, heat, hydrogen, and methanol in the electric-hydrogen energy supply system, determine the energy equipment included in the electric-hydrogen energy supply system, and establish corresponding new categories; S2. Based on the Common Information Model (CIM) and extension principles specified in the IEC61970 series of standards, establish relationships between the new classes expanded in step S1 and the original classes in the CIM using inheritance. Based on the energy coupling relationship analyzed in step S1, establish interactive relationships between the new classes through association and / or aggregation, thereby preliminarily establishing a basic information model of the electric hydrogen energy supply system, so that the model can reflect the mutual relationship between energy flows. S3. Based on the configuration and operating parameters of the electric hydrogen energy supply system, corresponding attributes and characteristic curves are added to each new class expanded in step S1, thereby expanding the basic information model established in step S2 to obtain the electric hydrogen energy supply system information model that can describe the system characteristics.

[0007] As a preferred solution, the coupling and conversion path in step S1 includes an electric energy flow path, specifically: The generation of electric energy flow includes distributed energy in the electric hydrogen energy supply system and micro-gas turbines in the trigeneration system, wherein the distributed energy includes photovoltaics and wind turbines; The flow of electrical energy is bidirectional, including transmission with the grid through tie lines; The energy conversion methods of electric energy flow include directly supplying power to the load or performing bidirectional charging and discharging with the hybrid energy storage system according to the power balance status, and the other way is converted into hydrogen energy flow, heat energy flow, and methanol energy flow through various equipment respectively; specifically, it is converted into hydrogen energy flow and heat energy flow through hydrogen electrolyzers; and converted into methanol energy flow through carbon capture equipment and methanol synthesis equipment.

[0008] As a preferred solution, the coupling and conversion path in step S1 also includes a hydrogen energy flow coupling path, specifically: The hydrogen energy flow is coupled with the electrical energy flow through the hydrogen electrolyzer and hydrogen fuel cell. The heat generated by the hydrogen electrolyzer and hydrogen fuel cell during operation is transferred to the heat exchanger to realize the conversion of hydrogen energy flow into thermal energy flow. The hydrogen energy flow is used as a raw material and converted into a methanol energy flow through a methanol synthesis unit; By coupling the hydrogen electrolyzer with the electric energy flow, hydrogen is produced by the principle of water electrolysis and stored in a hybrid hydrogen storage device, realizing the conversion of electric energy flow into hydrogen energy flow; The coupling between the hydrogen fuel cell and the electric energy flow is established to supply the hydrogen stored in the hybrid hydrogen storage device to the anode, so that it reacts chemically with oxygen in the electrolyte, thereby converting the hydrogen energy flow into the electric energy flow.

[0009] As a preferred solution, the coupling and conversion path in step S1 also includes a heat flow coupling path, specifically: A coupling relationship is established with the electricity, hydrogen, and methanol energy flows through a heat exchanger, including the recovery of heat generated by the electrolysis process of the hydrogen electrolyzer, the power generation process of the hydrogen fuel cell, the power generation process of the methanol fuel cell, and the micro-turbine combustion process of the trigeneration system; The coupling and conversion path in step S1 also includes a methanol energy flow coupling path, specifically: Through the methanol synthesis reaction, hydrogen energy flow and carbon elements are synthesized into methanol under the drive of electric energy flow; The methanol energy flow is converted into electrical energy flow and thermal energy flow through a methanol fuel cell.

[0010] As a preferred solution, the energy equipment includes energy conversion equipment, multi-energy flow storage equipment and auxiliary equipment; the energy equipment included in the electric hydrogen energy supply system is determined and the corresponding new category is established, including: For energy conversion equipment, we have established alkaline electrolyzers, proton exchange membrane electrolyzers, proton exchange membrane fuel cells, solid oxide fuel cells, micro-turbines, absorption cooling and heating units, carbon capture devices, methanol synthesis equipment, and methanol fuel cells; For multi-energy flow storage devices, hybrid hydrogen storage unit class, hybrid energy storage unit class and methanol storage tank class are established. The hybrid hydrogen storage unit class is expanded into solid hydrogen storage class, gas hydrogen storage class and water heater class. The hybrid energy storage unit class is expanded into flywheel energy storage class, liquid flow energy storage class, lead-carbon energy storage class, supercapacitor class, lithium-ion battery class and sodium-ion battery class. For auxiliary equipment, a public workstation equipment category and a methanol separation device category are established, and the public workstation category is expanded to include a pure water system category, a compressed air system category, a circulating water system category, a cooling water system category, a nitrogen supply system category and a heat exchanger category.

[0011] As a preferred solution, step S2 establishes a relationship between each new class expanded in step S1 and the original class in the CIM by inheritance, including: The alkaline electrolyzer class, proton exchange membrane electrolyzer class, absorption chiller class, and methanol synthesis equipment class are inherited from the original power system resource (PowerSystemResource) class in the CIM; The proton exchange membrane fuel cell class, solid oxide fuel cell class, micro-turbine class and methanol fuel cell class are inherited from the original prime mover (PrimeMover) class in the CIM; The hybrid hydrogen storage unit class, hybrid energy storage unit class and methanol storage tank class are inherited from the original generating unit (GeneratingUnit) class and conducting equipment (ConductingEquipment) class in the CIM; The carbon capture device class, public workstation equipment class, heat exchanger class, and methanol separation device class are inherited from the original equipment class in the CIM.

[0012] As a preferred solution, the energy coupling relationship obtained by analyzing step S1 in step S2 includes: The hydrogen electrolyzer converts the electrical energy flow into hydrogen energy flow and heat energy flow through the electrolysis of water through the pure water system, cooling water system, nitrogen supply system, and heat exchanger, and stores the hydrogen energy in the hybrid hydrogen storage unit; The hydrogen fuel cell consumes the hydrogen stored in the hybrid hydrogen storage unit and converts the hydrogen energy flow into electrical energy flow and thermal energy flow through a heat exchanger; The carbon capture equipment captures carbon dioxide from the exhaust gas of the micro-turbine combustion and provides carbon-containing raw materials for the methanol synthesis process through the compressed air system. The hydrogen supply equipment for the methanol synthesis process is a hybrid hydrogen storage unit, based on which the electrical energy flow and hydrogen energy flow are converted into methanol energy flow; The methanol synthesis equipment stores the synthesized methanol in a methanol storage tank through a methanol separation device. The methanol storage tank converts the methanol energy flow into electrical energy flow and thermal energy flow through a methanol fuel cell generator and a heat exchanger.

[0013] As a preferred solution, in step S2, based on the energy coupling relationship obtained by analysis in step S1, establishing the interaction relationship between the new classes by association and / or aggregation includes: Associating the alkaline electrolyzer class and the proton exchange membrane electrolyzer class with the pure water system class, the cooling water system class, the nitrogen supply system class, the heat exchanger class and the hybrid hydrogen storage unit class; Associating the proton exchange membrane fuel cell type, the solid oxide fuel cell type, the heat exchanger type and the hybrid hydrogen storage unit type; Associating the carbon capture device with the micro-turbine class and the compressed air system class; Associate the methanol synthesis equipment category with the compressed air system category, and the mixed hydrogen storage unit category with the methanol separation device category; Associate the methanol storage tank category with the methanol separation device category and the methanol fuel cell category; Associate the methanol fuel cell class with the heat exchanger class; Aggregating solid hydrogen storage, gas hydrogen storage and water heater through the mixed hydrogen storage unit; The hybrid energy storage unit aggregates flywheel energy storage, liquid flow energy storage, lead-carbon energy storage, supercapacitor, lithium-ion battery and sodium-ion battery; The public workstation equipment includes pure water systems, gas compressors, circulating water systems, cooling water systems, nitrogen supply systems and heat exchangers; The trigeneration system is aggregated into micro-turbines and absorption cooling and heating units.

[0014] As a preferred solution, the configuration and operating parameters of the electric hydrogen energy supply system include installed capacity, power, efficiency, pressure, temperature and flow, etc.; the characteristic curves include operating output power curve, multi-energy flow storage state curve, hydrogen production curve, operating temperature curve, synthesis curve, etc.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention first conducts a comprehensive and in-depth analysis of the coupling and conversion mechanisms between the various energy flows (electricity, heat, hydrogen, and methanol) in the electric-hydrogen energy supply system. Through rigorous research, these device types are identified and the complex coupling relationships between them are clarified. This in-depth exploration of the underlying system mechanisms provides a solid theoretical foundation for the subsequent construction of a precise and efficient information model of the electric-hydrogen energy supply system, ensuring that the model truly and accurately reflects the actual system operation.

[0016] Based on a deep understanding of the coupling and conversion mechanism, the present invention further conducts a detailed analysis of the newly created classes and properties required to expand the above-mentioned equipment. The specific equipment is abstracted into a series of new classes with universality, and the diverse operating parameters of different equipment are abstracted into the properties of the new classes. This abstract processing method makes the model no longer limited to specific equipment models and specifications, greatly improving the versatility of the model. No matter what new equipment is introduced into the electric hydrogen energy supply system in the future, as long as it conforms to the basic energy flow coupling and conversion principles, it can be included in the model by adjusting the properties and relationships of the new class, thereby enhancing the scalability of the model and providing strong support for the long-term development and upgrading of the system.

[0017] Based on energy flow relationships and the interaction logic between devices, the present invention defines the relationships between new classes, existing classes, and new classes. By generalizing and inheriting relevant new classes from existing classes, knowledge reuse and model simplification are achieved, avoiding the workload and complexity brought about by repeated modeling. At the same time, by using association, aggregation, and other methods to establish relationships between new classes, the interactions and collaborative working mechanisms between devices are clearly depicted. This reasonable definition of inter-class relationships constructs a hierarchical and logically clear model architecture, making the model easy to understand and maintain.

[0018] The present invention closely combines the physical quantities in the actual design, configuration and energy management process of the electric hydrogen energy supply system, such as installed capacity, power, efficiency, pressure, temperature and flow, and sets detailed attributes for each new class. These attributes not only cover the basic operating parameters of the equipment, but also take into account the dynamic changes of the system under different working conditions. In addition, relevant characteristic curves such as power output curves, multi-energy flow storage state curves, hydrogen production curves, operating temperature curves, synthesis curves, etc. are added to further enrich the information of the model. These characteristic curves can intuitively reflect the performance of the equipment under different conditions, and provide an important reference basis for the operation optimization and energy management of the system. By combining actual physical quantities and characteristic curves, the electric hydrogen energy supply system information model constructed by the present invention has higher practicality and accuracy, and can better meet the needs of practical applications.

[0019] In summary, the present invention constructs an information model of the electric-hydrogen energy supply system with strong versatility, good scalability, clear architecture, high practicality and accuracy through in-depth analysis of the coupling conversion mechanism of the electric-hydrogen energy supply system, abstract processing of equipment and parameters, reasonable definition of inter-class relationships, and combination of actual physical quantities and characteristic curves. It provides strong technical support for the optimized design, efficient operation and scientific management of the electric-hydrogen energy supply system.

[0020] Further or more detailed beneficial effects will be described in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a flowchart of a method for establishing an information model of an electric hydrogen energy supply system according to an embodiment of the present invention.

[0023] Figure 2Schematic diagram of the coupling and conversion paths among the electricity, heat, hydrogen and methanol energy flows in the electric hydrogen energy supply system according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the equipment classification of the trigeneration system described in an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the classification of public workstation equipment described in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the classification of the hybrid hydrogen storage unit described in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the classification of the hydrogen electrolyzer equipment described in an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the classification of hydrogen fuel cell equipment described in an embodiment of the present invention.

[0029] Figure 8 This is a classification diagram of the methanol production and fuel cell system described in an embodiment of the present invention.

[0030] Figure 9 This is a schematic diagram of the classification of hybrid energy storage units described in an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] In the following description, multiple embodiments of the present invention are provided. Different embodiments may be replaced or combined, and therefore the present invention may be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present invention should also be considered to include embodiments that include one or more of all other possible combinations of A, B, C, and D, even if such embodiments may not be explicitly described in the following text.

[0033] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements described without departing from the scope of the present invention. Various examples may appropriately omit, replace, or add various processes or components. For example, the described method may be performed in an order different from the order described, and various steps may be added, omitted, or combined. Furthermore, features described in some examples may be combined in other examples.

[0034] This embodiment provides an information model of an electric hydrogen energy supply system based on the CIM model expansion. Figure 1 The establishment of the electric hydrogen energy supply system information model shown includes the following steps: S1. Analyze the coupling and conversion paths among the energy flows of electricity, heat, hydrogen, and methanol in the electric-hydrogen energy supply system, determine the energy equipment included in the electric-hydrogen energy supply system, and establish corresponding new categories; S2. Based on the Common Information Model (CIM) and extension principles specified in the IEC61970 series of standards, establish relationships between the new classes expanded in step S1 and the original classes in the CIM using inheritance. Based on the energy coupling relationship analyzed in step S1, establish interactive relationships between the new classes through association and / or aggregation, thereby preliminarily establishing a basic information model of the electric hydrogen energy supply system, so that the model can reflect the mutual relationship between energy flows. S3. Based on the configuration and operating parameters of the electric hydrogen energy supply system, corresponding attributes and characteristic curves are added to each new class expanded in step S1, thereby expanding the basic information model established in step S2 to obtain the electric hydrogen energy supply system information model that can describe the system characteristics.

[0035] CIM uses object-oriented modeling techniques, using the Unified Modeling Language (UML) notation. Each class is defined in text by defining its attributes and defining relationships with other classes through inheritance, association, and aggregation. A CIM class is a group of objects with the same attributes in the real world, providing an abstract description for all objects belonging to that class. Therefore, when establishing relevant classes in the CIM model, it is necessary to first analyze the coupling and conversion paths between the electricity, heat, hydrogen, and methanol energy flows in the electric-hydrogen energy supply system, clarify the composition and types of key equipment in each energy flow conversion process, and abstract the specific equipment into a series of new classes as the basis for establishing new classes. Based on the CIM model definition, when expanding new classes, it is necessary to define their attributes and establish relationships between them. More specifically, the attributes of the new classes are derived by abstracting the electrical and physical parameters of each device in the electric-hydrogen energy supply system. Relationships between classes are defined based on the energy flow relationships and the interaction logic between devices in the electric-hydrogen energy supply system. The relevant new classes are generalized by inheriting from existing classes, and relationships between the new classes are established through association and aggregation. For example, for the coupling equipment that converts electric energy flow into hydrogen energy flow, it is necessary to clarify that the electric energy flow is converted into hydrogen energy flow through the hydrogen electrolyzer, so a new class needs to be established for the hydrogen electrolyzer; at the same time, it has electrical and physical parameters such as operating temperature, system operating pressure, and rated power in actual operation, so when defining the electrolyzer class, the above parameters need to be considered as its attributes; in the flow path of the hydrogen energy flow, the electrolyzer converts the electric energy flow into hydrogen energy flow and then flows to the hybrid energy storage, so it is necessary to establish an association between the electrolyzer class and the hybrid energy storage class.

[0036] Specifically, this embodiment provides a preferred implementation method, such as Figure 2The coupling and conversion path in step S1 shown includes an electric energy flow path, specifically: The generation of electric energy flow includes distributed energy in the electric hydrogen energy supply system and micro-gas turbines in the trigeneration system, wherein the distributed energy includes photovoltaics and wind turbines; The flow of electrical energy is bidirectional, including transmission with the grid through tie lines; The energy conversion methods of electric energy flow include directly supplying power to the load or performing bidirectional charging and discharging with the hybrid energy storage system according to the power balance status, and the other way is converted into hydrogen energy flow, heat energy flow, and methanol energy flow through various equipment respectively; specifically, it is converted into hydrogen energy flow and heat energy flow through hydrogen electrolyzers; and converted into methanol energy flow through carbon capture equipment and methanol synthesis equipment.

[0037] Specifically, this embodiment provides a preferred implementation method, such as Figure 2 The coupling and conversion path in step S1 shown also includes a hydrogen energy flow coupling path, specifically: The hydrogen energy flow is coupled with the electrical energy flow through the hydrogen electrolyzer and hydrogen fuel cell. The heat generated by the hydrogen electrolyzer and hydrogen fuel cell during operation is transferred to the heat exchanger, thereby realizing the conversion of hydrogen energy flow into thermal energy flow. The hydrogen energy flow is used as a raw material and converted into a methanol energy flow through a methanol synthesis unit; The conversion and storage of electrical energy flow into hydrogen energy flow requires a coupling relationship between the hydrogen electrolyzer and the electrical energy flow, and the hydrogen is produced by the principle of water electrolysis and stored in a hybrid hydrogen storage device. The conversion of hydrogen energy flow into electrical energy flow requires coupling through a hydrogen fuel cell, supplying the hydrogen stored in the hybrid hydrogen storage device to the anode, causing it to chemically react with oxygen in the electrolyte, thereby converting the stored hydrogen energy flow into electrical energy flow.

[0038] Specifically, this embodiment provides a preferred implementation method, such as Figure 2 The coupling and conversion path in step S1 shown also includes a heat flow coupling path, specifically: The heat flow is coupled with the electricity, hydrogen and methanol energy flows through the heat exchanger, namely the electrolysis process of the hydrogen recovery electrolyzer, that is, the electricity flow is partially converted into heat flow; the power generation process of the hydrogen fuel cell, that is, the hydrogen flow is partially converted into heat flow; the heat generated in the power generation process of the methanol fuel cell, that is, the methanol flow is partially converted into heat flow; The coupling and conversion path in step S1 also includes a methanol energy flow coupling path, specifically: The methanol energy flow is converted into the hydrogen energy flow and the carbon dioxide energy flow by the methanol synthesis equipment under the drive of the electric energy flow, and is stored in the synthesized methanol; The methanol energy flow is converted into electrical energy flow and thermal energy flow through the methanol fuel cell.

[0039] The above steps analyze the energy devices required for the conversion paths and mutual coupling of electricity, hydrogen, heat, and methanol energy flows to determine the energy devices included in the electric-hydrogen energy supply system and establish new classes based on these existing devices. This example is based on the IEC61970 standard and follows the CIM modeling approach and extension rules. The software platform used is Enterprise Architect to expand new classes, add attributes, and establish inheritance, association, and aggregation relationships between different classes.

[0040] Specifically, this embodiment provides a preferred implementation method, wherein the energy equipment includes energy conversion equipment, multi-energy flow storage equipment, and auxiliary equipment; the energy equipment included in the electric hydrogen energy supply system is determined and the corresponding new class is established, including: Create a new class in the Enterprise Architect platform.

[0041] The process of creating a new class for energy conversion devices is as follows: against Figure 2 The trigeneration system entity in the energy flow path shown is mainly composed of micro-turbines and absorption cooling and heating units. Therefore, two new classes, micro-turbines and absorption cooling and heating units, are created. Figure 3 As shown; against Figure 2 The hydrogen electrolyzer entity in the energy flow path shown is subdivided into two types of hydrogen electrolyzers: alkaline electrolyzer and proton exchange membrane electrolyzer. Therefore, two new categories, alkaline electrolyzer and proton exchange membrane electrolyzer, are newly created. In addition, based on the hydrogen production characteristics of the electrolyzer entity, new alkaline electrolyzer hydrogen transmission pipe categories and proton exchange membrane electrolyzer hydrogen transmission pipe categories are newly created, such as Figure 6 As shown; against Figure 2 The hydrogen fuel cell entity in the energy flow path shown is subdivided into two types of hydrogen fuel cells: proton exchange membrane fuel cell and solid oxide fuel cell. Therefore, two new classes, proton exchange membrane fuel cell class and solid oxide fuel cell class, are created, such as Figure 7 As shown; against Figure 2 For the carbon capture, methanol synthesis and methanol fuel cell in the energy flow path shown, new carbon capture device, methanol synthesis equipment and methanol fuel cell categories are established respectively. Figure 8 As shown; The process of creating a new class for multi-energy flow storage devices is as follows: against Figure 2The hybrid hydrogen storage in the energy flow path shown is mainly composed of three main devices: solid hydrogen storage, gas hydrogen storage and water heater. Therefore, a new hybrid hydrogen storage unit class is created, and solid hydrogen storage, gas hydrogen storage and water heater classes are created according to their component equipment. The latter three are related to the hybrid hydrogen storage unit class through aggregation, as shown in the following example: Figure 5 As shown; against Figure 2 The hybrid energy storage in the energy flow path shown is mainly composed of flywheel energy storage, liquid flow energy storage, lead-carbon energy storage, supercapacitors, lithium-ion batteries and sodium-ion batteries. Therefore, a new hybrid energy storage unit class is created, and according to its component equipment, a new flywheel energy storage class, liquid flow energy storage class, lead-carbon energy storage class, supercapacitor class, lithium-ion battery class and sodium-ion battery class are created, as shown in the following figure: Figure 9 As shown; The process of creating a new class for assistive devices is as follows: against Figure 2 For the synthetic methanol in the energy flow path shown, it is analyzed that its normal operation in reality requires the assistance of a methanol separation device. The synthesized methanol is transported to the methanol storage tank through the methanol separation device, so a new methanol separation device class is created; against Figure 2 The public auxiliary equipment required for the normal operation of each device in the energy flow path shown above is a new public workstation equipment class. The auxiliary function is specifically manifested in that in the actual operation of the above-mentioned physical equipment, the support of auxiliary systems such as pure water system, cooling water system, compressed air system, circulating water system, nitrogen supply system, heat exchanger system, etc. is required. Among them, the heat exchanger class is Figure 2 The heat exchanger in the energy flow path shown corresponds to the hydrogen electrolyzer, hydrogen fuel cell, cooling and heating units in the trigeneration system, and methanol fuel cell. Therefore, the pure water system class, compressed air system class, circulating water system class, cooling water system class, nitrogen supply system class, and heat exchanger class are abstracted for the actual equipment entity, such as Figure 4 shown.

[0042] Specifically, this embodiment provides a preferred implementation method, wherein the step S2 establishes a relationship between each new class expanded in step S1 and the original class in the CIM by inheritance, including: In the EnterpriseArchitect platform, establish an inheritance relationship between the new class and the existing class in the original CIM model, as follows: The alkaline electrolyzer class, proton exchange membrane electrolyzer class, absorption chiller class, and methanol synthesis equipment class establish an inheritance relationship with the power system resource (PowerSystemResource) class in the original CIM model; The proton exchange membrane fuel cell class, solid oxide fuel cell class, micro-turbine class and methanol fuel cell class establish an inheritance relationship with the prime mover (PrimeMover) class in the original CIM model; The hybrid hydrogen storage unit class, hybrid energy storage unit class and methanol storage tank class establish inheritance relationships with the generating unit (GeneratingUnit) class and conducting equipment (ConductingEquipment) class in the original CIM model; The carbon capture device class, public workstation equipment class and methanol separation device class establish inheritance relationships with the Equipment class in the original CIM model.

[0043] Specifically, this embodiment provides a preferred implementation method, in step S2, the energy coupling relationship obtained by analyzing step S1 includes: The hydrogen electrolyzer converts the electrical energy flow into hydrogen energy flow and heat energy flow through the pure water system, cooling water system, nitrogen supply system and heat exchanger through water electrolysis, and the produced hydrogen is stored in the mixed hydrogen storage unit through the hydrogen transmission pipeline; The hydrogen fuel cell consumes the hydrogen stored in the hybrid hydrogen storage unit and converts the hydrogen energy flow into electrical energy flow and thermal energy flow through a heat exchanger; The carbon capture equipment captures carbon dioxide from the exhaust gas of the micro-turbine combustion and provides carbon-containing raw materials for the methanol synthesis process through the compressed air system. The hydrogen supply equipment for the methanol synthesis process is a hybrid hydrogen storage unit, based on which the electrical energy flow and hydrogen energy flow are converted into methanol energy flow; The methanol synthesis equipment stores the synthesized methanol in a methanol storage tank through a methanol separation device. The methanol storage tank converts the methanol energy flow into electrical energy flow and thermal energy flow through a methanol fuel cell generator and a heat exchanger.

[0044] Specifically, this embodiment provides a preferred implementation method, wherein in step S2, based on the energy coupling relationship obtained by analysis in step S1, the interaction relationship between the new classes is established by association and / or aggregation, including: To create associations / aggregations between different classes in Enterprise Architect, use the following: Establishing an association relationship between the alkaline electrolyzer class, the proton exchange membrane electrolyzer class, the pure water system class, the cooling water system class, the nitrogen supply system class, the heat exchanger class, and the hybrid hydrogen storage unit class; Establishing an association relationship between the proton exchange membrane fuel cell type, the solid oxide fuel cell type, the heat exchanger type and the hybrid hydrogen storage unit type; Establishing an association relationship between the carbon capture device, the micro-turbine category, and the compressed air system category; Establish associations between the methanol synthesis equipment category and the compressed air system category, and between the mixed hydrogen storage unit category and the methanol separation device category; Establish an association between the methanol storage tank category, the methanol separation device category, and the methanol fuel cell category; Establish an association between the methanol fuel cell category and the heat exchanger category; Establishing an aggregation relationship between the mixed hydrogen storage unit type and the solid hydrogen storage type, and between the gas hydrogen storage type and the water heater type; Establishing a polymerization relationship between the alkaline electrolytic cell and the alkaline electrolytic cell hydrogen transmission pipe; Establishing an aggregation relationship between the proton exchange membrane electrolyzer and the proton exchange membrane electrolyzer hydrogen transmission pipe; Establishing an aggregation relationship between the hybrid energy storage unit type and the flywheel energy storage type, liquid flow energy storage type, lead-carbon energy storage type, supercapacitor type, lithium-ion battery type and sodium-ion battery type; Establishing an aggregation relationship between the public workstation equipment class and the pure water system class, the gas compressor class, the circulating water system class, the cooling water system class, the nitrogen supply system class, and the heat exchanger class; An aggregation relationship is established between the trigeneration system class, the micro-turbine class and the absorption cooling and heating unit class.

[0045] Specifically, this embodiment provides a preferred implementation method, in step S3, corresponding attributes and characteristic curves are added to each new class expanded in step S2 to obtain the electric hydrogen functional system information model capable of describing the system characteristics, including: The properties of different classes are defined in the Enterprise Architect platform as follows: The parameters involved in the configuration and operation of the trigeneration system, such as installed capacity, power generation efficiency, thermal efficiency, flue gas temperature, rated power, implementation power, high-temperature chilled water generation, water flow, cold water inlet temperature, cold water outlet temperature, cooling water pressure, operating frequency, high-temperature hot water generation, and hot water outlet temperature, are abstracted into corresponding attributes of the micro-turbine class and the cooling and heating unit class, such as Figure 3 As shown; For the parameters involved in the configuration and operation of the public workstation equipment entity, such as rated flow, rated head, rated power, pure water capacity, air flow, rated pressure, return water temperature, outlet water temperature, outlet air pressure, heat exchange area, heat exchange power, primary side temperature, secondary side temperature, cooling water capacity, cooling water flow, etc., they are abstracted into corresponding attributes of pure water system class, compressed air system class, circulating water system class, nitrogen supply system class, cooling water system class and heat exchanger class, such as Figure 4 As shown; The parameters of the hybrid hydrogen storage system involved in the configuration and operation process, such as hydrogen absorption pressure, hydrogen desorption pressure, hydrogen storage capacity, maximum hydrogen absorption flow rate, maximum hydrogen desorption flow rate, maximum working pressure, working pressure, rated power, rated voltage, and water tank volume, are abstracted into corresponding attributes of solid hydrogen storage, gas hydrogen storage, and water heater, such as Figure 5As shown; The maximum pressure, operating temperature, rated power, automatic gas source pressure, system operating pressure, output, and hydrogen purity parameters involved in the configuration and operation of the hydrogen electrolyzer entity are abstracted into corresponding attributes of alkaline electrolyzer class, proton exchange membrane electrolyzer class, alkaline electrolyzer hydrogen transmission pipe class, and proton exchange membrane hydrogen transmission pipe class, such as Figure 6 As shown; The gas flow, hydrogen inlet pressure, rated power, cooling water outlet temperature, cooling water flow, rated operating temperature, and electrochemical efficiency parameters involved in the configuration and operation of the hydrogen fuel cell entity are abstracted into corresponding properties of the proton exchange membrane fuel cell class and the solid oxide fuel cell class, such as Figure 7 As shown; For the parameters involved in the configuration and operation of methanol preparation and methanol fuel cell entities, such as methanol production, methanol purity, methanol temperature, working flow, working pressure, working temperature, flue gas absorption flow, absorption pressure, absorption temperature, installed capacity, power generation efficiency, etc., they are abstracted into corresponding attributes of carbon capture device class, micro-turbine class, synthetic methanol unit class, methanol separation device class, methanol storage tank class, and methanol fuel cell class, such as Figure 8 As shown; For the parameters of hybrid energy storage entities involved in the configuration and operation process, such as charging and discharging efficiency, maximum speed, minimum speed, rated capacity, rated power, and rated voltage, they are abstracted into corresponding attributes of flywheel energy storage, liquid flow energy storage, lead-carbon energy storage, supercapacitor, lithium-ion battery, and sodium-ion battery, such as Figure 9 As shown; The different types of characteristic curves defined in the Enterprise Architect platform are inherited from the Curve class in the original CIM model, as follows: In view of the dynamic characteristics of the trigeneration system entity during operation, the absorption cooling and heating unit curve is added to describe the operation status of the absorption cooling and heating unit, and an aggregation relationship is established with the absorption cooling and heating unit class; the micro-gas turbine curve is added to describe the power output curve of the micro-gas turbine unit, and an aggregation relationship is established with the micro-gas turbine class; In view of the dynamic characteristics of the hybrid hydrogen storage entity during operation, hydrogen absorption and desorption curves are added to describe the changes in the hydrogen absorption and desorption power of the hybrid hydrogen storage device during operation; a hydrogen storage state curve is added to describe the changes in the hydrogen storage capacity of the hybrid hydrogen storage device over time, and both are aggregated with the hybrid hydrogen storage unit class. In view of the dynamic characteristics of the hydrogen electrolyzer entity during operation, the alkaline electrolyzer hydrogen production curve and the proton exchange membrane electrolyzer hydrogen production curve are added to describe the changes in the hydrogen production status of the two electrolyzers, and an aggregation relationship is established with the alkaline electrolyzer hydrogen transmission pipe type and the proton exchange membrane electrolyzer hydrogen transmission pipe type respectively; the alkaline electrolyzer power curve and the proton exchange membrane electrolyzer power curve are added to describe the changes in the input power of the two electrolyzers, and an aggregation relationship is established with the alkaline electrolyzer type and the proton exchange membrane electrolyzer type respectively; In view of the dynamic characteristics of hydrogen fuel cell entities during operation, the proton exchange membrane fuel cell curve and solid oxide fuel cell curve are added to describe the changes in the output power of the two fuel cells, and aggregation relationships are established with the proton exchange membrane fuel cell category and the solid oxide fuel cell category respectively; In view of the dynamic characteristics of methanol preparation and methanol fuel cell entities during operation, a methanol synthesis curve is added to describe the dynamic changes in methanol production and establish an aggregation relationship with the synthetic methanol unit class; a methanol storage state curve is added to describe the changes in methanol reserves in the methanol storage tank and establish an aggregation relationship with the methanol storage tank class; a methanol fuel cell curve is added to describe the changes in the output power of the methanol fuel cell and establish an aggregation relationship with the methanol fuel cell class; In view of the dynamic characteristics of the hybrid energy storage entity during operation, energy storage charging and discharging curves are added to describe the charging and discharging state changes of the hybrid energy storage system, and an aggregation relationship is established with the hybrid energy storage unit class.

[0046] It should be noted that for the aforementioned method embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0047] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0048] The foregoing is merely an exemplary embodiment of the present invention and is not intended to limit the scope of the present invention. That is, any equivalent changes and modifications made in accordance with the teachings of the present invention are still within the scope of the present invention. A person skilled in the art will readily come up with the embodiments of the present invention after considering the specification and practicing the disclosure herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not described in the present invention. The description and examples are to be regarded as exemplary only, and the scope and spirit of the present invention are defined by the claims.

Claims

1. An information model of an electric hydrogen energy supply system based on the CIM model, characterized in that: The establishment of the electric hydrogen energy supply system information model includes the following steps: S1. Analyze the coupling and conversion paths among the energy flows of electricity, heat, hydrogen, and methanol in the electric-hydrogen energy supply system, determine the energy equipment included in the electric-hydrogen energy supply system, and establish corresponding new categories; S2. Based on the Common Information Model (CIM) and extension principles specified in the IEC61970 series of standards, establish relationships between the new classes expanded in step S1 and the original classes in the CIM using inheritance. Based on the energy coupling relationship analyzed in step S1, establish interactive relationships between the new classes through association and / or aggregation, thereby preliminarily establishing a basic information model of the electric hydrogen energy supply system, so that the model can reflect the mutual relationship between energy flows. S3. Based on the configuration and operating parameters of the electric hydrogen energy supply system, corresponding attributes and characteristic curves are added to each new class expanded in step S1, thereby expanding the basic information model established in step S2 to obtain the electric hydrogen energy supply system information model that can describe the system characteristics.

2. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 1 is characterized in that: The coupling and conversion path in step S1 includes an electric energy flow path, specifically: The generation of electric energy flow includes distributed energy in the electric hydrogen energy supply system and micro-gas turbines in the trigeneration system, wherein the distributed energy includes photovoltaics and wind turbines; The flow of electrical energy is bidirectional, including transmission with the grid through tie lines; The energy conversion methods of electric energy flow include directly supplying power to the load or performing bidirectional charging and discharging with the hybrid energy storage system according to the power balance status, and the other way is converted into hydrogen energy flow, heat energy flow, and methanol energy flow through various equipment respectively; specifically, it is converted into hydrogen energy flow and heat energy flow through hydrogen electrolyzers; and converted into methanol energy flow through carbon capture equipment and methanol synthesis equipment.

3. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 2 is characterized in that: The coupling and conversion path in step S1 also includes a hydrogen energy flow coupling path, specifically: The hydrogen energy flow is coupled with the electrical energy flow through the hydrogen electrolyzer and hydrogen fuel cell. The heat generated by the hydrogen electrolyzer and hydrogen fuel cell during operation is transferred to the heat exchanger to realize the conversion of hydrogen energy flow into thermal energy flow. The hydrogen energy flow is used as a raw material and converted into a methanol energy flow through a methanol synthesis unit; By coupling the hydrogen electrolyzer with the electric energy flow, hydrogen is produced by the principle of water electrolysis and stored in the mixed hydrogen storage, realizing the conversion of electric energy flow into hydrogen energy flow; The coupling between the hydrogen fuel cell and the electric energy flow is established to supply the hydrogen stored in the hybrid hydrogen storage device to the anode, so that it reacts chemically with oxygen in the electrolyte, thereby converting the hydrogen energy flow into the electric energy flow.

4. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 3 is characterized in that: The coupling and conversion path in step S1 also includes a heat flow coupling path, specifically: A coupling relationship is established with the electricity, hydrogen, and methanol energy flows through a heat exchanger, including the recovery of heat generated by the electrolysis process of the hydrogen electrolyzer, the power generation process of the hydrogen fuel cell, the power generation process of the methanol fuel cell, and the micro-turbine combustion process of the trigeneration system; The coupling and conversion path in step S1 also includes a methanol energy flow coupling path, specifically: Through the methanol synthesis reaction, hydrogen energy flow and carbon elements are synthesized into methanol under the drive of electric energy flow; The methanol energy flow is converted into electrical energy flow and thermal energy flow through a methanol fuel cell.

5. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 3 is characterized in that: The coupling and conversion path in step S1 also includes a methanol energy flow coupling path, specifically: Through the methanol synthesis reaction, hydrogen energy flow and carbon elements are synthesized into methanol under the drive of electric energy flow; The methanol energy flow is converted into electrical energy flow and thermal energy flow through a methanol fuel cell.

6. The electric hydrogen energy supply system information model based on the CIM model extension according to claim 5 is characterized by: The energy equipment includes energy conversion equipment, multi-energy flow storage equipment and auxiliary equipment; The energy equipment included in the electric hydrogen energy supply system is determined and the corresponding new categories are established, including: For energy conversion equipment, we have established alkaline electrolyzers, proton exchange membrane electrolyzers, proton exchange membrane fuel cells, solid oxide fuel cells, micro-turbines, absorption cooling and heating units, carbon capture devices, methanol synthesis equipment, and methanol fuel cells; For multi-energy flow storage devices, hybrid hydrogen storage unit class, hybrid energy storage unit class and methanol storage tank class are established. The hybrid hydrogen storage unit class is expanded into solid hydrogen storage class, gas hydrogen storage class and water heater class. The hybrid energy storage unit class is expanded into flywheel energy storage class, liquid flow energy storage class, lead-carbon energy storage class, supercapacitor class, lithium-ion battery class and sodium-ion battery class. For auxiliary equipment, a public workstation equipment category and a methanol separation device category are established, and the public workstation category is expanded to include a pure water system category, a compressed air system category, a circulating water system category, a cooling water system category, a nitrogen supply system category and a heat exchanger category.

7. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 6 is characterized in that: Step S2 establishes relationships between the new classes expanded in step S1 and the original classes in the CIM by inheritance, including: The alkaline electrolyzer class, proton exchange membrane electrolyzer class, absorption chiller class, and methanol synthesis equipment class are inherited from the original power system class in the CIM; The proton exchange membrane fuel cell class, solid oxide fuel cell class, micro-turbine class and methanol fuel cell class are inherited from the original prime mover class in the CIM; The hybrid hydrogen storage unit class, hybrid energy storage unit class and methanol storage tank class are inherited from the original power generation unit class and conductive equipment class in the CIM; The carbon capture device class, public workstation equipment class and methanol separation device class are inherited from the original equipment class in the CIM.

8. The electric hydrogen energy supply system information model based on the CIM model extension according to claim 7 is characterized in that: The energy coupling relationship obtained by analyzing step S1 in step S2 includes: The hydrogen electrolyzer converts the electrical energy flow into hydrogen energy flow and heat energy flow through the electrolysis of water through the pure water system, cooling water system, nitrogen supply system, and heat exchanger, and stores the hydrogen energy in the hybrid hydrogen storage unit; The hydrogen fuel cell consumes the hydrogen stored in the hybrid hydrogen storage unit and converts the hydrogen energy flow into electrical energy flow and thermal energy flow through a heat exchanger; The carbon capture equipment captures carbon dioxide from the exhaust gas of the micro-turbine combustion and provides carbon-containing raw materials for the methanol synthesis process through the compressed air system. The hydrogen supply equipment for the methanol synthesis process is a hybrid hydrogen storage unit, based on which the electrical energy flow and hydrogen energy flow are converted into methanol energy flow; The methanol synthesis equipment stores the synthesized methanol in a methanol storage tank through a methanol separation device. The methanol storage tank converts the methanol energy flow into electrical energy flow and thermal energy flow through a methanol fuel cell generator and a heat exchanger.

9. The electric hydrogen energy supply system information model based on the CIM model expansion according to claim 8 is characterized in that: In step S2, based on the energy coupling relationship obtained by analysis in step S1, an interaction relationship between the new classes is established by association and / or aggregation, including: Associating the alkaline electrolyzer class and the proton exchange membrane electrolyzer class with the pure water system class, the cooling water system class, the nitrogen supply system class, the heat exchanger class and the hybrid hydrogen storage unit class; Associating the proton exchange membrane fuel cell type, the solid oxide fuel cell type, the heat exchanger type and the hybrid hydrogen storage unit type; Associating the carbon capture device with the micro-turbine class and the compressed air system class; Associate the methanol synthesis equipment category with the compressed air system category, and the mixed hydrogen storage unit category with the methanol separation device category; Associate the methanol storage tank category with the methanol separation device category and the methanol fuel cell category; Associate the methanol fuel cell class with the heat exchanger class; Aggregating solid hydrogen storage, gas hydrogen storage and water heater through the mixed hydrogen storage unit; The hybrid energy storage unit aggregates flywheel energy storage, liquid flow energy storage, lead-carbon energy storage, supercapacitor, lithium-ion battery and sodium-ion battery; The public workstation equipment includes pure water systems, gas compressors, circulating water systems, cooling water systems, nitrogen supply systems and heat exchangers; The trigeneration system is aggregated into micro-turbines and absorption cooling and heating units.

10. The electric hydrogen energy supply system information model based on the CIM model extension according to claim 9 is characterized by: The configuration and operating parameters of the electric hydrogen energy supply system include installed capacity, power, efficiency, pressure, temperature and flow rate; The characteristic curves include an operating output power curve, a multi-energy flow storage state curve, a hydrogen production curve, an operating temperature curve, a synthesis curve, and the like.

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