A method for electricity-hydrogen joint planning considering hydrogen production, storage, transmission and utilization

Abstract

This paper discloses a method for planning the combined operation of electricity and hydrogen, taking into account hydrogen production, storage, transportation, and utilization. Specifically, it includes a model for the combined operation of electricity and hydrogen, optimizing the nonlinear terms in the model to make it easier to solve. This method, from a global perspective of the electricity-hydrogen coupled system, integrates constraints such as regional electricity-hydrogen resource integration, hydrogen storage capacity allocation, and optimal transportation scheduling to minimize the total cost of the combined operation of electricity and hydrogen, avoiding the waste of resources caused by planning and operating a single system. Therefore, it is suitable for widespread application.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric hydrogen production, and specifically relates to an electric hydrogen joint planning method considering hydrogen production, storage, transmission and utilization. Background Art

[0002] Among all clean energy sources, hydrogen is widely considered the secondary energy source with the greatest potential for future development. It possesses numerous advantages over other energy sources, including abundant reserves, high energy density, and storability. Hydrogen emits water after use, achieving zero carbon emissions and zero pollution. Furthermore, hydrogen's unique advantages of storage, transport, and power generation make it suitable for large-scale use in energy storage and power generation, enabling the conversion of hydrogen and electricity into each other, complementing each other's strengths.

[0003] Among the various hydrogen production technologies currently available, water electrolysis technology, which uses electricity generated by renewable energy as power, is the most mature and has the greatest potential. It has mature technology, simple equipment, and is pollution-free. The resulting hydrogen has high purity and low impurity content. It is suitable for various occasions and is the best way to the hydrogen economy.

[0004] The electric-hydrogen coupling system is a new physical entity created by the coupling of electric power and hydrogen production. Current research on electric-hydrogen coupling has focused solely on the power and hydrogen energy sectors, with no reported methods for system-level planning. In the power sector, research primarily focuses on modeling the electrolyzer, the power load, and on its system-level operation and planning, without considering downstream storage and transportation. In the hydrogen energy sector, research primarily focuses on modeling and planning the hydrogen supply chain, encompassing power generation, hydrogen production, transportation, storage, and consumption. There is a lack of research on planning electric-hydrogen coupling systems coupled to the power grid, and a lack of research on minimizing the total cost of combined electric-hydrogen operation systems. This results in irrational planning for electric-hydrogen production systems and waste of resources. Summary of the Invention

[0005] The purpose of the present invention is to provide an electric-hydrogen joint planning method that takes into account hydrogen production, storage, transportation and use, and comprehensively constrains regional electric-hydrogen resource integration, hydrogen storage capacity configuration and optimal transportation scheduling, so as to avoid the waste of resources caused by planning and operating a single system.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A method for electric-hydrogen joint planning considering hydrogen production, storage, transmission and utilization includes the following steps:

[0008] Step S1: Model the hydrogen production node. For any k-th hydrogen production node, the electrolyzer cluster of the hydrogen production node needs to meet the upper and lower limits of its dynamic operating power. Its total hydrogen production is:

[0009]

[0010] Among them, T is the time range of planned operation, K is the total number of hydrogen production nodes, represents the total amount of hydrogen produced by the kth hydrogen production node at time t; η EL Indicates the operating efficiency of the electrolyzer; represents the electrolysis power of the kth hydrogen production node at time t;

[0011] The electrolysis power satisfies the following constraints:

[0012]

[0013] in, and The minimum and maximum adjustment coefficients of the dynamic operating power of the cluster electrolyzers respectively;

[0014] S2: Model the power supply node. The electricity used for hydrogen production comes from the power grid. Consider the existing base load and incremental hydrogen production load for the connected power supply node. The hydrogen production load must meet the safe operation conditions of the power supply node. The existing base load power is directly given by the predicted historical data, while the incremental hydrogen production load needs to be constrained according to the actual power supply connection status of the hydrogen production node and must meet the following requirements:

[0015] A: The load rate of the power node does not exceed the maximum load rate for safe operation; that is:

[0016]

[0017] Where M is the total number of power nodes, It is composed of binary 0 / 1 variables, representing the connection relationship between the mth power supply node and the kth hydrogen production node. L is the binary line connection matrix L = [M, K]; represents the hydrogen production power provided by the mth power supply node to the kth hydrogen production node at time t; represents the base load power of the mth power node at time t; is the maximum load rate of the mth power node, is the rated power;

[0018] B: The power of each power supply line of the hydrogen production node should not exceed the maximum transmission power of the line; that is,

[0019]

[0020] in, For the line Maximum transmission power;

[0021] S3: Model the hydrogen transport link. In this link, liquid hydrogen is transported by a tube bundle vehicle. The hydrogen in the hydrogen storage tank of the hydrogen production node is delivered to the hydrogen storage tank of the hydrogen consumption node through the transportation network. The hydrogen transport volume is:

[0022]

[0023] Among them, T c Indicates the hydrogen transport time, represents the amount of hydrogen transported on the path from the kth hydrogen production node to the nth hydrogen load side, Indicates the total amount of hydrogen transported to the nth hydrogen load side;

[0024] Set the daily hydrogen delivery time to a fixed time, and the maximum hydrogen delivery capacity limit meets the following requirements:

[0025]

[0026] in, and They represent the minimum and maximum values ​​of hydrogen transported along the route respectively;

[0027] Its maximum transport distance limit meets:

[0028] 0≤Dist k→n ≤Dist max ;

[0029] Among them, Dist k→n Indicates the actual hydrogen transportation distance of the path, Dist max Indicates the maximum hydrogen transport distance of this path;

[0030] S4: Model the hydrogen storage process, using hydrogen storage tanks and high-pressure gaseous hydrogen storage technology to achieve intraday balance between hydrogen production and hydrogen consumption. The hydrogen storage tanks must meet the material balance requirements for continuous storage and long-term storage. The hydrogen storage processes on both the hydrogen production and hydrogen consumption sides must meet the following constraints:

[0031]

[0032] Among them, N HS (t) represents the hydrogen storage capacity of the hydrogen storage tank at time t; and They represent the amount of hydrogen flowing in and out at time t, respectively, and the hydrogen production node side and Respectively represent the total amount of hydrogen produced by the electrolyzer and the total amount of hydrogen transported by the tube bundle truck, and the hydrogen node side and They represent the total amount of hydrogen transported by the tube bundle truck and the total amount of hydrogen used by the hydrogen load; and Indicates the efficiency of hydrogen inflow and outflow; N HS (0) and NHS (T) represents the hydrogen storage capacity of the hydrogen storage tank at the initial time and the end time respectively; Indicates the maximum value of hydrogen outflow, limited by the compressor power; and Respectively represent the maximum and minimum values ​​of the hydrogen storage tank capacity;

[0033] S5: Model the hydrogen consumption process and establish a lumped hydrogen load model. The total amount of hydrogen used by the hydrogen load is balanced with the total amount of hydrogen storage tanks and hydrogen transportation. The constraints are as follows:

[0034]

[0035] in, represents the hydrogen storage capacity of the hydrogen storage tank of hydrogen-using node n at time t; represents the total amount of hydrogen used by hydrogen-using node n at time t;

[0036] S6: Construct a joint planning objective function. The objective function includes two parts: cost and benefit. Since the grid hydrogen production electricity price and hydrogen sales price are fixed, once the hydrogen consumption is determined, the total hydrogen production electricity and total hydrogen sales revenue are constant and do not participate in the objective function optimization. Therefore, the objective function of this model only considers internal investment and operation and maintenance costs. The specific expression of the objective function is as follows:

[0037]

[0038] Among them, Cost Line Cost represents the investment cost of the power supply line. EL Cost represents the cost of the electrolytic cell. Car Cost represents the hydrogen transportation cost. HS Indicates the cost of hydrogen storage tank, Cost HS Including the cost of hydrogen storage tanks at hydrogen production nodes and hydrogen storage tank costs on the hydrogen load side Two parts; ann is the present value minus the annuity conversion factor, r is the discount rate, and Y is the useful life; c Line 、c EL 、c HS 、c Car are the unit costs of the line, electrolyzer, hydrogen storage tank and hydrogen bundle vehicle respectively; Line 、fix HS 、fix EL Respectively represent the proportion of fixed operation and maintenance costs of power supply lines, hydrogen storage tanks and electrolyzers to investment costs; Dist k→m Indicates the distance between the hydrogen production node and the power supply node; Dist k→n Indicates the distance between the hydrogen production node and the hydrogen load, represents the hydrogen storage tank capacity of the kth hydrogen production node, Indicates the hydrogen storage tank capacity of the nth hydrogen load node.

[0039] Furthermore, in the present invention, the power of each power supply line of the hydrogen production node in step S2 should not exceed the maximum transmission power constraint of the line, and the following is obtained:

[0040]

[0041] in, and The product term represents the actual hydrogen production power of the power supply circuit.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The present invention discloses an electric-hydrogen joint planning method considering hydrogen production, storage, transmission and use, which specifically includes an electric-hydrogen joint planning model considering hydrogen production, storage, transmission and use, and optimizes the nonlinear terms in the model to make the model easier to solve; this method takes a global perspective of the electric-hydrogen coupled system, and comprehensively constrains regional electric-hydrogen resource integration, hydrogen storage capacity configuration and optimal transportation scheduling, so that the total cost of the electric-hydrogen joint operation system is minimized, avoiding resource waste caused by planning and operating a single system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is the structural intention of the production-storage-transmission-use electricity and hydrogen joint planning model in the embodiment of the present invention.

[0045] Figure 2 This is a schematic diagram of a scenario to be planned in an embodiment of the present invention.

[0046] Figure 3 This is a schematic diagram of the annual predicted basic load of power node 1 in an embodiment of the present invention.

[0047] Figure 4 This is a schematic diagram of the annual predicted basic load of power node 2 in an embodiment of the present invention.

[0048] Figure 5 This is a schematic diagram of the annual predicted basic load of power node 3 in an embodiment of the present invention.

[0049] Figure 6 This is a schematic diagram of the annual predicted basic load of power node 4 in an embodiment of the present invention.

[0050] Figure 7 This is a schematic diagram of the annual predicted basic load of power node 5 in an embodiment of the present invention.

[0051] Figure 8 This is a schematic diagram of the annual predicted hydrogen consumption of hydrogen load node 6 in an embodiment of the present invention.

[0052] Figure 9 This is a schematic diagram of the annual predicted hydrogen consumption of hydrogen load node 7 in an embodiment of the present invention.

[0053] Figure 10 This is a schematic diagram of the annual predicted hydrogen consumption of hydrogen load node 8 in an embodiment of the present invention.

[0054] Figure 11 This is a schematic diagram of the annual predicted hydrogen consumption of hydrogen load node 9 in an embodiment of the present invention.

[0055] Figure 12 This is a schematic diagram of the power supply line planning results in an embodiment of the present invention.

[0056] Figure 13 This is a schematic diagram of hydrogen consumption and transportation scheduling planning for hydrogen load node 9 in the first quarter in an embodiment of the present invention.

[0057] Figure 14 This is a schematic diagram of hydrogen consumption and transportation scheduling planning for hydrogen load node 8 in the first quarter in an embodiment of the present invention.

[0058] Figure 15 This is a schematic diagram of hydrogen consumption and transportation scheduling planning for hydrogen load node 7 in the first quarter in an embodiment of the present invention.

[0059] Figure 16 This is a schematic diagram of hydrogen consumption and transportation scheduling planning for hydrogen load node 6 in the first quarter in an embodiment of the present invention.

[0060] Figure 17 This is a schematic diagram of the hydrogen storage tank capacity at a hydrogen load node within a certain week in an embodiment of the present invention.

[0061] Figure 18 This is a schematic diagram of the total daily hydrogen production of a power supply node in an embodiment of the present invention. DETAILED DESCRIPTION

[0062] The present invention will be further described below with reference to the accompanying drawings and examples. The embodiments of the present invention include but are not limited to the following examples.

[0063] Example

[0064] The present invention discloses a method for electric-hydrogen joint planning that considers hydrogen production, storage, transmission and use. The electric-hydrogen joint planning includes hydrogen production, transmission, storage and use. The hydrogen production stage uses electrolyzers, the hydrogen transmission stage uses tube bundle vehicles, the hydrogen storage stage uses hydrogen storage tanks, and the hydrogen use stage is a mixed field of transportation and industry. The hydrogen production stage can only be located in a chemical park, and it is necessary to plan the power supply node for hydrogen production. Both the hydrogen production and hydrogen use sides are equipped with hydrogen storage tanks, such as Figure 1As shown. For a given number of M power supply nodes, N hydrogen load nodes, and K chemical park hydrogen production nodes in any area, through joint planning of electricity and hydrogen, the total cost of grid line expansion, hydrogen transportation, hydrogen storage tank investment, and operation and maintenance can be minimized while satisfying the material balance of N hydrogen loads and the power balance of M power supply nodes. Hydrogen production by electrolysis of water purchases electricity from the power grid. Assuming that the electricity price and hydrogen price are constant, the revenue from hydrogen sales is constant after the total hydrogen consumption is determined. The time planning scale is hours, and the annual analysis is a total of 8760 hours. Through joint planning of electricity and hydrogen, the installed capacity of the electrolyzers of the K hydrogen production nodes and the hydrogen storage tank capacity of the hydrogen production nodes, the power supply line planning from M to K, the hydrogen storage tank capacity of the N hydrogen load sides, and the daily hydrogen transportation scheduling plan are obtained.

[0065] Model the hydrogen production node. For any k-th hydrogen production node, the electrolyzer cluster of the hydrogen production node needs to meet the upper and lower limits of its dynamic operating power. Its total hydrogen production is:

[0066]

[0067] Among them, T is the time range of planned operation, K is the total number of hydrogen production nodes, represents the total amount of hydrogen produced by the kth hydrogen production node at time t; η EL Indicates the operating efficiency of the electrolyzer; represents the electrolysis power of the kth hydrogen production node at time t.

[0068] The electrolysis power satisfies the following constraints:

[0069]

[0070] in, and The minimum and maximum adjustment coefficients of the dynamic operating power of the cluster electrolyzers respectively;

[0071] Model the power supply node. The electricity used for hydrogen production comes from the power grid. Consider the existing base load and incremental hydrogen production load for the connected power supply node. The hydrogen production load must meet the safe operation conditions of the power supply node. The existing base load power is directly given by the predicted historical data. The incremental hydrogen production load needs to be constrained according to the actual power supply connection status of the hydrogen production node and must meet the following requirements:

[0072] A: The load rate of the power node does not exceed the maximum load rate for safe operation; that is:

[0073]

[0074] Where M is the total number of power nodes, It is composed of binary 0 / 1 variables, representing the connection relationship between the mth power supply node and the kth hydrogen production node. L is the binary line connection matrix L = [M, K]; represents the hydrogen production power provided by the mth power supply node to the kth hydrogen production node at time t; represents the base load power of the mth power node at time t; is the maximum load rate of the mth power node, is the rated power.

[0075] B: The power of each power supply line of the hydrogen production node should not exceed the maximum transmission power of the line; that is,

[0076]

[0077] in, For the line The maximum transmission power of and The product term of represents the actual hydrogen production power of the power supply circuit, but nonlinearity is introduced, so the product term of the actual hydrogen production power can be adjusted to the formula In, use replace Linearization yields:

[0078]

[0079] By optimizing the nonlinear terms, the model is converted into a mixed integer linear programming form (MILP), which can be solved by commercial solvers, thereby simplifying the model calculation.

[0080] S3: Model the hydrogen transport link. In this link, liquid hydrogen is transported by a tube bundle vehicle. The hydrogen in the hydrogen storage tank of the hydrogen production node is delivered to the hydrogen storage tank of the hydrogen consumption node through the transportation network. The hydrogen transport volume is:

[0081]

[0082] Among them, T c Indicates the hydrogen transport time, represents the amount of hydrogen transported on the path from the kth hydrogen production node to the nth hydrogen load side, Indicates the total amount of hydrogen transported to the nth hydrogen load side;

[0083] Set the daily hydrogen delivery time to a fixed time, and the maximum hydrogen delivery capacity limit meets the following requirements:

[0084]

[0085] in, and They represent the minimum and maximum values ​​of hydrogen transported along the route respectively;

[0086] Its maximum transport distance limit meets:

[0087] 0≤Dist k→n ≤Dist max ;

[0088] Among them, Dist k→n Indicates the actual hydrogen transportation distance of the path, Dist max Indicates the maximum hydrogen transportation distance of this path.

[0089] Model the hydrogen storage process, using hydrogen storage tanks and high-pressure gaseous hydrogen storage technology to achieve daily balance between hydrogen production and hydrogen consumption. The hydrogen storage tanks must meet the material balance requirements for continuous storage and long-term storage. The hydrogen storage processes on both the hydrogen production and hydrogen consumption sides must meet the following constraints:

[0090]

[0091] Among them, N HS (t) represents the hydrogen storage capacity of the hydrogen storage tank at time t; and They represent the amount of hydrogen flowing in and out at time t, respectively, and the hydrogen production node side and Respectively represent the total amount of hydrogen produced by the electrolyzer and the total amount of hydrogen transported by the tube bundle truck, and the hydrogen node side and They represent the total amount of hydrogen transported by the tube bundle truck and the total amount of hydrogen used by the hydrogen load; and Indicates the efficiency of hydrogen inflow and outflow; N HS (0) and N HS (T) represents the hydrogen storage capacity of the hydrogen storage tank at the initial time and the end time respectively; Indicates the maximum value of hydrogen outflow, limited by the compressor power; and Respectively represent the maximum and minimum values ​​of the hydrogen storage tank capacity;

[0092] The hydrogen consumption link is modeled and a lumped hydrogen load model is established. The total amount of hydrogen used by the hydrogen load is balanced with the total amount of hydrogen storage tanks and hydrogen transportation. The constraints are as follows:

[0093]

[0094] in, represents the hydrogen storage capacity of the hydrogen storage tank of hydrogen-using node n at time t; represents the total amount of hydrogen used by hydrogen-using node n at time t;

[0095] The joint planning objective function is constructed. The objective function includes two parts: cost and benefit. Since the grid hydrogen production electricity price and hydrogen sales price are fixed, once the hydrogen consumption is determined, the total hydrogen production electricity and total hydrogen sales revenue are constant and do not participate in the objective function optimization. Therefore, the objective function of this model only considers internal investment and operation and maintenance costs. The specific expression of the objective function is as follows:

[0096]

[0097] Among them, Cost Line Cost represents the investment cost of the power supply line. EL Cost represents the cost of the electrolytic cell. Car Cost represents the hydrogen transportation cost. HS Indicates the cost of hydrogen storage tank, Cost HS Including the cost of hydrogen storage tanks at hydrogen production nodes and hydrogen storage tank costs on the hydrogen load side Two parts; ann is the present value minus the annuity conversion factor, r is the discount rate, and Y is the useful life; c Line 、c EL 、c HS 、c Car are the unit costs of the line, electrolyzer, hydrogen storage tank and hydrogen bundle vehicle respectively; Line 、fix HS 、fix EL Respectively represent the proportion of fixed operation and maintenance costs of power supply lines, hydrogen storage tanks and electrolyzers to investment costs; Dist k→m Indicates the distance between the hydrogen production node and the power supply node; Dist k→n Indicates the distance between the hydrogen production node and the hydrogen load, represents the hydrogen storage tank capacity of the kth hydrogen production node, Indicates the hydrogen storage tank capacity of the nth hydrogen load node.

[0098] For the above objective function, the maximum iteration step size, solution time and solution error of the solver are set, and commonly used solvers such as CPLEX or GUROBI are used.

[0099] Input the annual base load power curve of M power nodes and 8760 hours of power data, which can be obtained through historical data prediction, scenario simulation, etc.

[0100] Input the annual hydrogen consumption curve of N hydrogen load nodes and 8760 hours of hydrogen consumption data, which can be obtained through historical data prediction, scenario simulation, etc.

[0101] Input the two-dimensional plane coordinate data of the power supply node, hydrogen load node and hydrogen production node.

[0102] Finally, the model can output the power supply line planning from M power nodes to K hydrogen production nodes, the installed power of the electrolyzer hydrogen production of the K hydrogen production nodes; the hydrogen storage tank capacity of the K hydrogen production nodes; the hydrogen storage tank capacity of the N hydrogen consumption nodes; and the hydrogen transportation scheduling plan of the tube bundle vehicle at the transportation time.

[0103] Specifically, a planned electricity-hydrogen scenario of power transmission-hydrogen production-hydrogen storage-hydrogen transmission-hydrogen use is as follows: Figure 2 As shown in Figure 1, the scenario includes 5 power supply nodes (numbered 1 to 5), 4 hydrogen load nodes (numbered 6 to 9), and 5 chemical park hydrogen production nodes (numbered 10 to 14). The 6#, 8#, and 9# hydrogen load nodes are close to the 10# and 11# hydrogen production nodes, and the 7# hydrogen load node is close to the 12# hydrogen production node. The spatial distances between the nodes are shown in Table 1. Through prediction, the basic load curve of each power supply node in the next year is as follows: Figures 3 to 7 As shown in the figure, the hydrogen load curve of each hydrogen node is shown in Figures 8-11 The rated power of the power supply nodes is 500MW, and the rated hydrogen consumption of the hydrogen consumption nodes are 10,000, 18,000, 15,000, and 30,000 Nm3 respectively. 3 .

[0104] The operating environment of this embodiment is:

[0105] The operating system is Windows 11, 64-bit. The processor is 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30 GHz. The memory is 16.0 GB. The software platform is Matlab 2018b. The solver is Gurobi 9.5.0.

[0106] Step 1: Input the electricity-hydrogen location data, future base load data, and future hydrogen consumption data of the scenario to be planned;

[0107] Input the spatial location data of regional electric hydrogen resources in Table 1, input Figures 3 to 7 8760-hour basic load curve data of power node, input Figure 4 8760-hour hydrogen consumption curve data of hydrogen nodes. The rated power of power nodes is 500MW, and the rated hydrogen consumption of hydrogen nodes is 10,000, 18,000, 15,000, and 30,000 Nm3 respectively. 3 .

[0108] Table 1 Spatial location of regional electric hydrogen resources

[0109]

[0110] Step 2: Input model parameters and configure the solver; the relevant model configuration is shown in Table 2.

[0111] Table 2 Parameters of the electric-hydrogen joint planning model

[0112]

[0113] Set the GUROBI solver to a maximum solution time of 43200 seconds (12 hours) and a solution tolerance of 0.05. Start the solver and perform the calculation.

[0114] Step 3: Post-processing

[0115] After the solution is completed, the results of the electricity-hydrogen joint planning are obtained. According to the configuration of a single electrolyzer with a capacity of 5MW, the final planning results can be obtained as shown in Table 3. The planning results of the hydrogen power supply line are shown in Table 3. Figure 12 , detailed hydrogen transportation scheduling plan can be found in Figures 13-16 , the hydrogen storage tank capacity of the hydrogen node in a certain week is shown in Figure 17 , the total amount of hydrogen produced per day by the power supply node is shown in Figure 18 .

[0116] Table 3 Detailed planning results

[0117]

[0118] Through the above design, the method of the present invention takes a global perspective of the electric-hydrogen coupling system, and comprehensively constrains regional electric-hydrogen resource integration, hydrogen storage capacity configuration, and optimal transportation scheduling, so that the total cost of the electric-hydrogen joint operation system is minimized, avoiding the waste of resources caused by planning and operating a single system.

[0119] The above embodiment is only one of the preferred implementation methods of the present invention and should not be used to limit the scope of protection of the present invention. Any changes or modifications that have no substantive meaning made to the main design concept and spirit of the present invention, as long as the technical problems solved are still consistent with the present invention, should be included in the scope of protection of the present invention.

Claims

1. A method for electricity-hydrogen joint planning considering hydrogen production, storage, transmission and use, characterized in that: The following steps are involved: Step S1: Model the hydrogen production node. For any k-th hydrogen production node, the electrolyzer cluster of the hydrogen production node needs to meet the upper and lower limits of its dynamic operating power. Its total hydrogen production is: Among them, T is the time range of planned operation, K is the total number of hydrogen production nodes, represents the total amount of hydrogen produced by the kth hydrogen production node at time t; η EL Indicates the operating efficiency of the electrolyzer; represents the electrolysis power of the kth hydrogen production node at time t; The electrolysis power satisfies the following constraints: in, and The minimum and maximum adjustment coefficients of the dynamic operating power of the cluster electrolyzers respectively; S2: Model the power supply node. The electricity used for hydrogen production comes from the power grid. Consider the existing base load and incremental hydrogen production load for the connected power supply node. The hydrogen production load must meet the safe operation conditions of the power supply node. The existing base load power is directly given by the predicted historical data, while the incremental hydrogen production load needs to be constrained according to the actual power supply connection status of the hydrogen production node and must meet the following requirements: A: The load rate of the power node does not exceed the maximum load rate for safe operation; that is: Where M is the total number of power nodes, It is composed of binary 0 / 1 variables, representing the connection relationship between the mth power supply node and the kth hydrogen production node. L is the binary line connection matrix L = [M, K]; represents the hydrogen production power provided by the mth power supply node to the kth hydrogen production node at time t; represents the base load power of the mth power node at time t; is the maximum load rate of the mth power node, is the rated power; B: The power of each power supply line of the hydrogen production node should not exceed the maximum transmission power of the line; that is, in, For the line Maximum transmission power; S3: Model the hydrogen transport link. In this link, liquid hydrogen is transported by a tube bundle vehicle. The hydrogen in the hydrogen storage tank of the hydrogen production node is delivered to the hydrogen storage tank of the hydrogen consumption node through the transportation network. The hydrogen transport volume is: Among them, T c Indicates the hydrogen transport time, represents the amount of hydrogen transported on the path from the kth hydrogen production node to the nth hydrogen load side, Indicates the total amount of hydrogen transported to the nth hydrogen load side; Set the daily hydrogen delivery time to a fixed time, and the maximum hydrogen delivery capacity limit meets the following requirements: in, and They represent the minimum and maximum values ​​of hydrogen transported along the route respectively; Its maximum transport distance limit meets: 0≤Dist k→n ≤Dist max ; Among them, Dist k→n Indicates the actual hydrogen transportation distance of the path, Dist max Indicates the maximum hydrogen transport distance of this path; S4: Model the hydrogen storage process, using hydrogen storage tanks and high-pressure gaseous hydrogen storage technology to achieve intraday balance between hydrogen production and hydrogen consumption. The hydrogen storage tanks must meet the material balance requirements for continuous storage and long-term storage. The hydrogen storage processes on both the hydrogen production and hydrogen consumption sides must meet the following constraints: Among them, N HS (t) represents the hydrogen storage capacity of the hydrogen storage tank at time t; N H2,in (t) and N H2,out (t) represents the amount of hydrogen flowing in and out at time t, and N H2,in (t) and N H2,out (t) represents the total amount of hydrogen produced by the electrolyzer and the total amount of hydrogen transported by the tube bundle truck, and the hydrogen node side N H2,in (t) and N H2,out (t) represents the total amount of hydrogen transported by the tube bundle truck and the total amount of hydrogen used for hydrogen load; and Indicates the efficiency of hydrogen inflow and outflow; N HS (0) and N HS (T) represents the hydrogen storage capacity of the hydrogen storage tank at the initial time and the end time respectively; Indicates the maximum value of hydrogen outflow, limited by the compressor power; and Respectively represent the maximum and minimum values ​​of the hydrogen storage tank capacity; S5: Model the hydrogen consumption process and establish a lumped hydrogen load model. The total amount of hydrogen used by the hydrogen load is balanced with the total amount of hydrogen storage tanks and hydrogen transportation. The constraints are as follows: in, represents the hydrogen storage capacity of the hydrogen storage tank of hydrogen-using node n at time t; represents the total amount of hydrogen used by hydrogen-using node n at time t; S6: Construct a joint planning objective function. The objective function includes two parts: cost and benefit. Since the grid hydrogen production electricity price and hydrogen sales price are fixed, once the hydrogen consumption is determined, the total hydrogen production electricity and total hydrogen sales revenue are constant and do not participate in the objective function optimization. Therefore, the objective function of this model only considers internal investment and operation and maintenance costs. The specific expression of the objective function is as follows: Among them, Cost Line Cost represents the investment cost of the power supply line. EL Cost represents the cost of the electrolytic cell. Car Cost represents the hydrogen transportation cost. HS Indicates the cost of hydrogen storage tank, Cost HS Including the cost of hydrogen storage tanks at hydrogen production nodes and hydrogen storage tank costs on the hydrogen load side Two parts; ann is the present value minus the annuity conversion factor, r is the discount rate, and Y is the useful life; c Line 、c EL 、c HS 、c Car are the unit costs of the line, electrolyzer, hydrogen storage tank and hydrogen bundle vehicle respectively; Line 、fix HS 、fix EL Respectively represent the proportion of fixed operation and maintenance costs of power supply lines, hydrogen storage tanks and electrolyzers to investment costs; Dist k→m Indicates the distance between the hydrogen production node and the power supply node; Dist k→n Indicates the distance between the hydrogen production node and the hydrogen load, represents the hydrogen storage tank capacity of the kth hydrogen production node, Indicates the hydrogen storage tank capacity of the nth hydrogen load node.

2. The method for electricity-hydrogen joint planning considering hydrogen production, storage, transmission and use according to claim 1 is characterized in that: The power of each power supply line of the hydrogen production node in step S2 should not exceed the maximum transmission power constraint of the line, and the following is obtained: in, and The product term represents the actual hydrogen production power of the power supply circuit.

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