A provincial collaborative multi-type electrolytic hydrogen production method considering electric energy transmission

Abstract

The application discloses a kind of provincial collaborative multi-type electrolytic hydrogen production methods considering electric energy transmission, it is related to the application field of integrated energy system, including the establishment of provincial electric energy transmission model, the model is for provincial area through extra-high voltage transmission line and is modeled for electric energy transmission, fully simulates the real utilization of extra-high voltage transmission line, second, for the difference of the working characteristics of different types of electrolytic cell, the multi-type electrolytic cell model considering power characteristics and climbing characteristics is established, effectively simulates the real working state of different electrolytic cell.Then model the rest in the model, such as fan, photovoltaic, hydroelectric, compressor, hydrogen storage tank, energy storage equipment, etc., establish a provincial collaborative supply chain model, finally, with the minimum total operating cost of system as the goal, establish a provincial collaborative multi-type electrolytic hydrogen production system considering electric energy transmission, realize provincial collaboration to reduce overall hydrogen production cost.

Description

Technical Field

[0001] This invention belongs to the field of integrated energy system application technology, specifically relating to a provincial-level collaborative multi-type electrolysis hydrogen production method that considers power transmission. Background Technology

[0002] Renewable energy electrolysis for hydrogen production serves as a crucial means of absorbing a high proportion of fluctuating renewable energy sources. On one hand, it addresses the massive renewable energy generation resulting from grid connection of high-proportion renewable energy; on the other hand, it effectively promotes the popularization and development of zero-carbon hydrogen energy. Renewable energy electrolysis for hydrogen production has become one of the important sources of hydrogen energy. Currently, there are three main problems with using renewable energy for hydrogen production: 1. The intermittent and fluctuating nature of renewable energy leads to an unstable hydrogen supply, and the high investment in electrolyzers results in high hydrogen production costs; 2. Significant differences in wind and solar resources across different regions lead to vastly different hydrogen production costs, hindering the comprehensive development of hydrogen energy; 3. Some regions possess substantial potential for renewable energy hydrogen production, but due to limited local hydrogen demand, there is a lack of efficient utilization of renewable energy sources. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a provincial-level collaborative multi-type electrolysis hydrogen production method that takes into account power transmission.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission includes the following steps:

[0006] To model power transmission through ultra-high voltage (UHV) transmission lines in provincial regions, simulate the actual utilization of UHV transmission lines, and establish a provincial power transmission model;

[0007] To address the differences in the working characteristics of different types of electrolyzers, a multi-type electrolyzer model considering power characteristics and ramp-up characteristics is established. The model simulates the actual working conditions of different types of electrolyzers.

[0008] Modeling was conducted for wind turbines, photovoltaic cells, hydropower, compressors, hydrogen storage tanks, and energy storage equipment to establish a provincial-level collaborative supply chain model;

[0009] Furthermore, with the goal of minimizing the total system operating cost, a provincial-level collaborative multi-type electrolysis hydrogen production model considering power transmission was established.

[0010] Furthermore, the method for establishing the provincial-level power transmission model includes:

[0011] Constraints are imposed on the provincial power transmission capacity and the utilization hours of the provincial power transmission capacity.

[0012] Furthermore, the power characteristics and ramp-up characteristics of the multi-type electrolytic cell models include:

[0013] The power characteristics and ramp-up characteristics of alkaline water electrolyzers, proton exchange membrane electrolyzers, and high-temperature solid oxide electrolyzers were determined.

[0014] Furthermore, the method for establishing the provincial collaborative supply chain model includes:

[0015] Under the condition of power balance in the provincial collaborative supply chain system, constraints are imposed on the reserve power, renewable energy generation, and equipment capacity of the provincial collaborative supply chain system.

[0016] Furthermore, the power balance of the provincial collaborative supply chain system is specifically as follows:

[0017]

[0018] in, and Let be the output power of the photovoltaic cells (pv), wind turbines (wt), and hydropower stations (hg) in the s-th region at time t. Let tg be the output power of the k-th thermal power generating unit in the s-th region at time t. and Let be the charging and discharging power of the battery storage in the s-th region at time t. Let be the net electrical load of the s-th region at time t (ignoring the electrical load under inter-provincial power transmission). Let be the input electrical power of the compressor in the s-th region at time t.

[0019] Furthermore, the aforementioned The negative sign should be used to indicate electrical energy output. For the receiving end, It should be positive to indicate electrical energy input.

[0020] Furthermore, the method for establishing the provincial collaborative supply chain model also includes:

[0021] Constraints are imposed on the operation of wind and solar power equipment, hydropower stations, thermal power generating units, battery energy storage, compressors, hydrogen storage tanks, and hydrogen load within the provincial collaborative supply chain.

[0022] Furthermore, the method for establishing the provincial-level collaborative multi-type electrolysis hydrogen production model considering power transmission includes:

[0023] A target function is established for a provincial-level collaborative multi-type electrolysis hydrogen production model that considers power transmission. The target function is:

[0024]

[0025] Where COST represents the total system cost for provincial collaborative regions, C inv,s C om,s and C op,s These represent the annual system investment cost, annual fixed operation and maintenance cost, and annual variable operation and maintenance cost for the s-th region, respectively.

[0026] The beneficial effects of this invention are:

[0027] Therefore, this invention, based on the provincial collaborative supply chain model, further considers inter-provincial power transmission and multiple types of electrolyzer technologies. A provincial power transmission model is established, modeling power transmission through ultra-high voltage (UHV) transmission lines within a province, fully simulating the actual utilization of UHV transmission lines. Secondly, considering the differences in the operating characteristics of different types of electrolyzers, a multi-type electrolyzer model considering power characteristics and ramp-up characteristics is established, effectively simulating the actual operating states of different electrolyzers. Then, other components in the model, such as wind turbines, photovoltaics, hydropower, compressors, hydrogen storage tanks, and energy storage equipment, are modeled to establish a provincial collaborative supply chain model. Finally, with the goal of minimizing the total system operating cost, a provincial collaborative multi-type electrolysis hydrogen production system considering power transmission is established to achieve provincial collaboration and reduce the overall hydrogen production cost.

[0028] Renewable energy electrolysis for hydrogen production serves as a crucial means of absorbing a high proportion of fluctuating renewable energy sources. On one hand, it addresses the massive renewable energy generation resulting from grid integration of these sources; on the other hand, it effectively promotes the widespread adoption and development of zero-carbon hydrogen energy. Renewable energy electrolysis for hydrogen production has become one of the important sources of hydrogen energy.

[0029] This invention, which considers provincial-level collaborative multi-type electrolysis hydrogen production technology based on power transmission, effectively simulates the real operation of provincial-level power transmission and multi-type electrolyzers, and achieves provincial-level collaboration to reduce the overall cost of hydrogen production. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a structural diagram of a provincial-level collaborative multi-type electrolysis hydrogen production system considering power transmission, as described in this invention.

[0032] Figure 2This is a flowchart of the method steps of the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention, based on a provincial collaborative supply chain model, further considers inter-provincial power transmission and various types of electrolytic cell technologies. Furthermore, considering China's mature ultra-high voltage (UHV) transmission technology, enabling large-scale power transmission, this invention establishes a provincial power transmission model. This model models power transmission across provincial regions via UHV transmission lines, fully simulating the actual utilization of these lines.

[0035] like Figure 1 As shown, a provincial-level collaborative multi-type electrolysis hydrogen production system considering power transmission includes photovoltaic cells, wind turbines, hydropower stations, multiple types of electrolyzers, compressors, hydrogen storage tanks, batteries, and ultra-high voltage transmission lines. Among them, photovoltaic cells, wind turbines, and hydropower stations generate electricity, multiple types of electrolyzers convert electricity into hydrogen energy, compressors compress the converted hydrogen energy and store it in hydrogen storage tanks, and the remaining electricity is stored in batteries for real-time power balancing. The ultra-high voltage transmission line serves as an inter-provincial power transmission line to realize the consumption of surplus electricity.

[0036] like Figure 2 As shown, a provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission specifically includes the following steps:

[0037] (1) Establish a provincial-level power transmission model;

[0038] The provincial power transmission power constraint is:

[0039]

[0040] in, Let be the transmission power of the l-th UHV transmission line in the s-th region at time t. This represents the maximum transmission power limit of the l-th ultra-high voltage transmission line in the s-th region.

[0041] The provincial-level power transmission utilization hours constraint is:

[0042]

[0043] Among them, T max The system scheduling end time. This represents the annual remaining utilization hours of the l-th ultra-high voltage transmission line in the s-th region (excluding the utilization hours of this ultra-high voltage line).

[0044] (2) Establish models for multiple types of electrolytic cells;

[0045] The power characteristics and ramp-up characteristics of the alkaline water electrolyzer (AWE) are as follows:

[0046]

[0047]

[0048]

[0049] in, and Let awe be the input electrical power of region s at time t and time t-1. The configuration capacity of AWE for the s-th region. The value of awe represents the working status of the s-th region at time t. A value of 1 indicates that the corresponding type of electrolytic cell is in operation, and a value of 0 indicates that the corresponding type of electrolytic cell is not in operation.

[0050] The power characteristics and ramp-up characteristics of a proton exchange membrane electrolyzer (PEM) are as follows:

[0051]

[0052]

[0053]

[0054] in, and Let pem be the input electrical power of region s at time t and time t-1. Let the configuration capacity of the PEM in the s-th region be [the capacity of the PEM]. The value of PEM represents the working status of the s-th region at time t. A value of 1 indicates that the corresponding type of electrolytic cell is in operation, and a value of 0 indicates that the corresponding type of electrolytic cell is not in operation.

[0055] The power characteristics and ramp-up characteristics of a high-temperature solid oxide electrolyzer (SOE) are as follows:

[0056]

[0057]

[0058]

[0059] in, and Let soe be the input electrical power of region s at time t and time t-1. The configuration capacity of the SOE in the s-th region. The value of soe represents the working status of the s-th region at time t. A value of 1 indicates that the corresponding type of electrolytic cell is running, and a value of 0 indicates that the corresponding type of electrolytic cell is not running.

[0060] (3) Establish a provincial-level collaborative supply chain model;

[0061] Provincial-level collaborative supply chain system power balance:

[0062]

[0063] in, and Let be the output power of the photovoltaic cells (pv), wind turbines (wt), and hydropower stations (hg) in the s-th region at time t. Let tg be the output power of the k-th thermal power generating unit in the s-th region at time t. and Let be the charging and discharging power of the battery storage in the s-th region at time t. Let be the net electrical load of the s-th region at time t (ignoring the electrical load under inter-provincial power transmission). Let be the input electrical power of the compressor in the s-th region at time t. It should be noted that for the transmission side... The negative sign should be used to indicate electrical energy output. For the receiving end, A positive sign should be used to indicate electrical energy input;

[0064] Provincial-level collaborative supply chain system backup power constraints:

[0065]

[0066] in, and Let be the unit output power of the photovoltaic cell and the wind turbine in the s-th region at time t, respectively. and These represent the newly configured and already configured photovoltaic cell capacities in the s-th region, respectively. and These represent the newly configured and existing wind turbine capacities in the s-th region, respectively. Let be the online capacity of the k-th thermal power generating unit in the s-th region at time t. and These are the battery energy storage reserve power and the hydropower station reserve power of the s-th region at time t, respectively;

[0067] Constraints on renewable energy power generation in provincial collaborative supply chain systems:

[0068]

[0069] Wherein, β represents the minimum proportion of renewable energy generation;

[0070] Provincial-level collaborative supply chain system equipment capacity constraints:

[0071]

[0072] in, and The configuration capacity of photovoltaic cells (PV), wind turbines (WT), alkaline water electrolyzers (AWE), proton exchange membrane electrolyzers (PEM), high-temperature solid oxide electrolyzers (SOE), compressors (HC), hydrogen storage tanks (HS), battery charging and discharging (EPS), and battery storage (EES) in region s are respectively.

[0073] Operational constraints of provincial collaborative supply chain for wind and solar power equipment:

[0074]

[0075]

[0076] Operational constraints of provincial collaborative supply chain hydropower stations:

[0077]

[0078]

[0079]

[0080] in, Let be the existing installed capacity of the hydropower station in region s. Let be the annual utilization hours of the run-of-river hydropower station in the s-th region;

[0081] Operational constraints of provincial collaborative supply chain thermal power generating units:

[0082]

[0083]

[0084]

[0085]

[0086]

[0087]

[0088] in, and These represent the starting capacity and shutdown capacity of the k-th thermal power generating unit in the s-th region at time t, respectively. su,k and T sd,k These represent the start-up and shutdown times of the k-th thermal power generating unit, respectively. For the existing installed capacity of thermal power generating units in region s, and These are the lower and upper limits of the output power ratio of the k-th thermal power generating unit, respectively, δ rp,k Let the gradient be the rate of the k-th thermal power generating unit;

[0089] Constraints on the operation of battery energy storage in provincial collaborative supply chains:

[0090]

[0091]

[0092]

[0093]

[0094]

[0095]

[0096] in, and η represents the battery storage capacity of the s-th region at time t and time t-1, respectively. es+ and η es- These are the charging and discharging efficiencies of the battery, respectively. and These represent the battery storage capacity of the s-th region at the start and end of the scheduling process, respectively.

[0097] Provincial collaborative supply chain compressor operation constraints:

[0098]

[0099]

[0100]

[0101] in, Let η be the hydrogen flow rate input to the compressor in region s at time t. awe η pem and η soe, respectively, are the conversion efficiencies of awe, pem and soe, lhv is the lower heating value of hydrogen combustion, and ω is the unit power consumption of the compressor;

[0102] Operational constraints of hydrogen storage tanks in provincial collaborative supply chains:

[0103]

[0104]

[0105]

[0106]

[0107]

[0108] in, The hydrogen flow rate input to the hydrogen storage tank in region s at time t is... Let σ be the hydrogen load of the s-th region at time t. hc The hydrogen filling and discharging loss rate of the hydrogen storage tank. and Let be the hydrogen storage capacity of the s-th region at time t and time t-1, respectively. and These represent the hydrogen storage capacity of the s-th region at the start and end of the scheduling process, respectively.

[0109] Provincial-level collaborative supply chain hydrogen load constraints:

[0110]

[0111]

[0112] in, Let be the annual hydrogen demand of the s-th region.

[0113] (4) Establish a provincial-level collaborative multi-type electrolysis hydrogen production model that takes into account power transmission.

[0114] The objective function of the provincial-level collaborative multi-type electrolysis hydrogen production model considering power transmission is:

[0115]

[0116]

[0117]

[0118]

[0119] Where COST represents the total system cost for provincial collaborative regions, Cinv,s C om,s and C op,s These represent the annual system investment cost, annual fixed operation and maintenance cost, and annual variable operation and maintenance cost for the s-th region, respectively. The annual investment cost of the i-th type of equipment is, and These represent the annual investment costs of PV, WT, AWE, PEM, SOE, HC, HS, EPS, and EE, respectively. The annual fixed maintenance cost of the i-th type of equipment is, and These represent the annual fixed operating costs of pv, wt, awe, pem, soe, hc, hs, eps, and ees, respectively. This represents the annual fixed operation and maintenance cost of the k-th thermal power generating unit. This represents the annual fixed operation and maintenance cost of hydropower. and Let these represent the annual variable operation and maintenance cost and the unit startup cost of the k-th thermal power generating unit, respectively. This indicates the annual variable operation and maintenance cost of hydropower.

[0120] The capital recovery factor for the i-th type of equipment is κ. i , i.e. κ pv κ wt κ awe κ pem κ soe κ hc κ hs κ eps and κ ees Let represent the capital recovery factors of PV, WT, AWE, PEM, SOE, HC, HS, EPS, and EE, respectively, and their values ​​are calculated as follows:

[0121]

[0122] Where r is the discount rate, N i Let be the lifespan of the corresponding i-th type of device.

[0123] This invention discloses a provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission. The method includes establishing a provincial-level power transmission model, which models power transmission through ultra-high voltage (UHV) transmission lines within a province, fully simulating the actual utilization of these lines. Secondly, considering the differences in operating characteristics of different types of electrolyzers, a multi-type electrolyzer model considering power characteristics and ramp-up characteristics is established, effectively simulating the actual operating states of different electrolyzers. Then, other components in the model, such as wind turbines, photovoltaics, hydropower, compressors, hydrogen storage tanks, and energy storage equipment, are modeled to establish a provincial-level collaborative supply chain model. Finally, with the goal of minimizing the total system operating cost, a provincial-level collaborative multi-type electrolysis hydrogen production system considering power transmission is established, achieving provincial collaboration to reduce the overall hydrogen production cost. Results show that this method effectively simulates the actual operating conditions of provincial-level power transmission and multi-type electrolyzers, and achieves provincial collaboration to reduce the overall hydrogen production cost.

[0124] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0125] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission, characterized in that, Includes the following steps: To model power transmission through ultra-high voltage (UHV) transmission lines in provincial regions, simulate the actual utilization of UHV transmission lines, and establish a provincial power transmission model; To address the differences in the working characteristics of different types of electrolyzers, a multi-type electrolyzer model considering power characteristics and ramp-up characteristics is established to simulate the actual working conditions of different electrolyzers. The multi-type electrolyzer model includes an alkaline water electrolyzer, a proton exchange membrane electrolyzer, and a high-temperature solid oxide electrolyzer. Modeling was conducted for wind turbines, photovoltaic cells, hydropower, compressors, hydrogen storage tanks, generators, and energy storage equipment to establish a provincial-level collaborative supply chain model; Furthermore, with the goal of minimizing the total system operating cost, a provincial-level collaborative multi-type electrolysis hydrogen production model considering power transmission was established. The method for establishing the provincial-level collaborative supply chain model includes: Under the condition of power balance in the provincial collaborative supply chain system, constraints are imposed on the reserve power, new energy power generation, and equipment capacity of the provincial collaborative supply chain system. The specific details of the power balance in the provincial collaborative supply chain system are as follows: in, , and Let be the output power of the photovoltaic cells, wind turbines, and hydropower stations in the s-th region at time t. Let be the output power of the k-th thermal power generating unit in the s-th region at time t. and Let be the charging and discharging power of the battery storage in the s-th region at time t. Let be the net electrical load of the s-th region at time t, where the net electrical load is the electrical load without considering inter-provincial power transmission. Let be the input electrical power of the compressor in the s-th region at time t; For the power transmission side, the aforementioned The negative sign should be used to indicate electrical energy output. For the receiving end, It should be positive to indicate electrical energy input.

2. The provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission according to claim 1, characterized in that, The method for establishing the provincial-level power transmission model includes: Constraints are imposed on the provincial power transmission capacity and the utilization hours of the provincial power transmission capacity.

3. The provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission according to claim 1, characterized in that, The method for establishing the provincial collaborative supply chain model also includes: Constraints are imposed on the operation of wind and solar power equipment, hydropower stations, thermal power generating units, battery energy storage, compressors, hydrogen storage tanks, and hydrogen load within the provincial collaborative supply chain.

4. The provincial-level collaborative multi-type electrolysis hydrogen production method considering power transmission according to claim 1, characterized in that, The method for establishing the provincial-level collaborative multi-type electrolysis hydrogen production model considering power transmission includes: A target function is established for a provincial-level collaborative multi-type electrolysis hydrogen production model that considers power transmission. The target function is: in, The total system cost for provincial-level collaborative regions. , and These represent the annual system investment cost, annual fixed operation and maintenance cost, and annual variable operation and maintenance cost for the s-th region, respectively.

5. A system for executing the provincial-level coordinated multi-type electrolysis hydrogen production method considering power transmission as described in any one of claims 1-4, characterized in that, It includes photovoltaic cells, wind turbines, hydropower stations, various types of electrolyzers, compressors, hydrogen storage tanks, batteries, and ultra-high voltage transmission lines. Among them, photovoltaic cells, wind turbines, and hydropower stations generate electricity, various types of electrolyzers convert electricity into hydrogen energy, compressors compress the converted hydrogen energy and store it in hydrogen storage tanks, and the remaining electricity is stored in batteries for real-time power balance. The ultra-high voltage transmission lines are used for inter-provincial power transmission.

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