A method and device for evaluating an integrated energy system for offshore wind power hydrogen storage and transportation

Abstract

The present invention discloses an offshore wind power hydrogen storage and transportation integrated energy system evaluation method and device. The method responds to the evaluation request through the control end, obtains the system cost data and wind speed data, and interpolates the wind turbine power curve to determine the output power of a single wind turbine; determines the dispatchable power according to the output power of a single wind turbine, the power consumption of seawater desalination, and the power consumption of the compression system; if the remaining hydrogen storage capacity is zero, the hydrogen production amount and the power sold to the grid at each moment are determined according to the dispatchable power and the energy storage charge state; if the remaining hydrogen storage capacity is not zero, the hydrogen production amount and the power sold to the grid at each moment are determined according to the dispatchable power, the rated power of hydrogen production, and the energy storage charge state, and multiple system economic indicators are determined to evaluate the degree of system configuration optimization within the evaluation time period. By simulating the system, the corresponding system economic indicators are obtained, and the system configuration of the integrated energy system is more accurately optimized.

Description

Technical Field

[0001] The present invention relates to the field of system evaluation technology, and in particular to an evaluation method and device for an offshore wind power hydrogen storage and transportation integrated energy system. Background Art

[0002] The global pursuit of clean energy is driving continuous improvements in wind power system optimization. However, due to the inherent volatility of wind power and the limitations of current grid connection technology and capacity, wind curtailment and power rationing remain extremely severe. Significant amounts of wind energy resources remain unutilized, resulting in significant energy waste and hindering the sustainable development of the wind power industry.

[0003] To effectively utilize wind power resources, "wind power hydrogen production" has become an innovative solution. By coupling wind power with hydrogen production, wind power can be consumed locally, and hydrogen energy storage can be used to store renewable energy on a large scale and over a long period of time. This effectively addresses the challenges associated with the intermittent and unstable nature of wind power and significantly improves the overall utilization efficiency of wind energy resources.

[0004] However, due to the fluctuating characteristics of the output power of offshore wind power plants and the complex source-load relationship of the wind-electricity-hydrogen-storage-transportation integrated energy system in the compression, storage, transportation and other links, it is difficult to accurately optimize the system configuration of the integrated energy system. Summary of the Invention

[0005] The present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation method and device, which solves the technical problem of difficulty in accurately optimizing the system configuration of the integrated energy system due to the influence of factors such as the output power fluctuation characteristics of the offshore wind power plant and the complex source-load relationship of the wind-power-hydrogen-storage-transportation integrated energy system on the compression, storage, and transportation links.

[0006] The present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation method, which is applied to a control terminal that is communicatively connected to the offshore wind power hydrogen storage and transportation integrated energy system. The offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The method includes:

[0007] In response to the evaluation request, obtaining system cost data and wind speed data of the wind power system model at each moment in the evaluation time period, and interpolating the wind turbine power curve to determine the output power of a single wind turbine;

[0008] Determining the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model;

[0009] If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, the hydrogen production amount and the grid-connected electricity sales power at each moment are determined according to the dispatchable power and the energy storage charge state of the energy storage system model;

[0010] If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero, the hydrogen production amount and the grid-connected electricity sales power at each moment are determined according to the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model;

[0011] According to the total hydrogen production, the grid-connected electricity sales power and the cost data, a plurality of system economic indicators are determined to evaluate the degree of system configuration optimization within the evaluation time period.

[0012] Optionally, determining the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model includes:

[0013] Calculating the product of the number of wind turbines in the wind power system model and the output power of the single wind turbine to obtain the total wind power output power;

[0014] Calculating a first difference between the total wind power output power and the seawater desalination power consumption of the seawater desalination system model at a previous moment;

[0015] The difference between the first difference and the compression system power consumption of the hydrogen compression model at the current moment is calculated to obtain the dispatchable power at the current moment.

[0016] Optionally, determining the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model includes:

[0017] Determining the hydrogen production distributable power and the energy storage system output power at each moment according to a comparison result of the energy storage charge state of the energy storage system model with a first preset value and in combination with the dispatchable power;

[0018] Calculating the difference between the dispatchable power and the output power of the energy storage system to obtain the grid-connected power for sale at each moment;

[0019] Determining the actual power consumption of hydrogen production according to a comparison result of the hydrogen production allocable power and the preset heating rated power;

[0020] The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

[0021] Optionally, the determining of the hydrogen production distributable power and the energy storage system output power at each moment based on the comparison result of the energy storage state of charge of the energy storage system model with a first preset value and the dispatchable power includes:

[0022] determining the hydrogen production allocatable power of the hydrogen production system model as a second preset value;

[0023] If the energy storage state of charge of the energy storage system model is a first preset value, the energy storage system output power of the energy storage system model is determined to be a second preset value;

[0024] If the energy storage state of charge is less than a first preset value, determining whether the dispatchable power is less than the energy storage battery capacity of the energy storage system model;

[0025] If it is less than, the energy storage system output power of the energy storage system model is determined as the dispatchable power;

[0026] If not, the energy storage system output power of the energy storage system model is determined as the energy storage battery capacity.

[0027] Optionally, determining the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage state of charge of the energy storage system model includes:

[0028] Determine the hydrogen production distributable power and the energy storage system output power at each moment according to a comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model, combined with the energy storage charge state of the energy storage system model;

[0029] Determining the actual power consumption of hydrogen production according to a comparison result of the hydrogen production allocable power and the preset heating rated power;

[0030] Calculating the difference between the dispatchable power, the actual power consumption of hydrogen production, and the output power of the energy storage system to obtain the grid-connected power for sale at each moment;

[0031] The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

[0032] Optionally, determining the hydrogen production distributable power and the energy storage system output power at each moment according to the comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model in combination with the energy storage charge state of the energy storage system model includes:

[0033] comparing the dispatchable power with the hydrogen production rated power of the hydrogen production system model;

[0034] If the dispatchable power is greater than the hydrogen production rated power, a first product of the number of hydrogen production equipment in the hydrogen production system model and the rated capacity of the equipment is calculated as the hydrogen production allocable power;

[0035] Determining the output power of the energy storage system according to the energy storage charge state of the energy storage system model, combined with the dispatchable power and the hydrogen production allocable power;

[0036] If the dispatchable power is not greater than the hydrogen production rated power, determining the output power of the energy storage system according to the first multiplier and the dispatchable power;

[0037] The sum of the dispatchable power and the output power of the energy storage system is calculated to obtain the hydrogen production allocable power.

[0038] Optionally, determining the output power of the energy storage system according to the energy storage state of charge of the energy storage system model, in combination with the dispatchable power and the hydrogen production allocable power, includes:

[0039]

[0040] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model.

[0041] Optionally, determining the output power of the energy storage system according to the first product value and the dispatchable power includes:

[0042]

[0043] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model, is the number of hydrogen production equipment, is the rated capacity of the hydrogen production equipment.

[0044] Optionally, the determining of a plurality of system economic indicators according to the total hydrogen production, the grid-connected electricity sales power and the cost data includes:

[0045] After summing up all the hydrogen production amounts according to the evaluation time period, calculating the ratio between the sum and the preset hydrogen production coefficient to obtain the total hydrogen production amount;

[0046] After calculating the second product of the total hydrogen production amount and the hydrogen selling price, the difference between the total hydrogen production amount and the hydrogen transportation cost is calculated to obtain the total hydrogen revenue;

[0047] After summing up all the on-grid electricity sales power according to the evaluation time period, calculating a third multiplication value between the sum and the on-grid electricity price;

[0048] Calculating the ratio between the third multiplication value and the preset electricity price coefficient to obtain the total revenue from electricity sales;

[0049] According to the total hydrogen revenue and the total electricity sales revenue, combined with the cost data, a plurality of system economic indicators are determined.

[0050] The present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation device, which is applied to a control terminal in communication with the offshore wind power hydrogen storage and transportation integrated energy system. The offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The device includes:

[0051] a wind speed processing module, configured to respond to an evaluation request, obtain system cost data and wind speed data of the wind power system model at each moment within an evaluation period, and interpolate a wind turbine power curve to determine a single wind turbine output power;

[0052] a dispatchable power calculation module, configured to determine the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model;

[0053] a first hydrogen production and electricity sales module, configured to determine the hydrogen production amount and the grid-connected electricity sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero;

[0054] The second hydrogen production and electricity sales module is used to determine the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero;

[0055] The system economic index determination module is used to determine multiple system economic indicators according to the total hydrogen production, the grid-connected electricity sales power and the cost data, so as to evaluate the degree of system configuration optimization within the evaluation time period.

[0056] It can be seen from the above technical solutions that the present invention has the following advantages:

[0057] The present invention obtains system cost data and wind speed data of the wind power system model at each moment in the evaluation time period through a control terminal response to an evaluation request, and interpolates the wind turbine power curve to determine the output power of a single wind turbine; determines the dispatchable power according to the output power of the single wind turbine, the desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, then determines the hydrogen production amount and the grid-connected power sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero, then determines the hydrogen production amount and the grid-connected power sales power at each moment based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model; and determines multiple system economic indicators based on the total hydrogen production amount, grid-connected power sales power, and cost data to evaluate the degree of system configuration optimization within the evaluation time period. By simulating the system, corresponding system economic indicators are obtained, and the system configuration of the integrated energy system is more accurately optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] 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.

[0059] Figure 1 A flowchart of the steps of a method for evaluating an offshore wind power hydrogen storage and transportation integrated energy system provided by an embodiment of the present invention;

[0060] Figure 2 is a schematic diagram of a wind turbine power output curve in an embodiment of the present invention;

[0061] Figure 3 Schematic diagram of a hydrogen production system model in an embodiment of the present invention;

[0062] Figure 4 Schematic diagram of a hydrogen production comprehensive efficiency curve of a hydrogen production system model ALE in an embodiment of the present invention;

[0063] Figure 5 A capacity diagram of a hydrogen storage system provided in an embodiment of the present invention;

[0064] Figure 6 A schematic diagram of a SoC curve of an energy storage system provided by an embodiment of the present invention;

[0065] Figure 7 A schematic diagram of the total output power of a wind farm and the power consumed by ALE provided in an embodiment of the present invention;

[0066] Figure 8 A schematic diagram of temperature changes of an ALE electrolyte provided by an embodiment of the present invention;

[0067] Figure 9 A schematic flow chart of a method for evaluating an offshore wind power hydrogen storage and transportation integrated energy system provided by an embodiment of the present invention;

[0068] Figure 10 This is a structural block diagram of an offshore wind power hydrogen storage and transportation integrated energy system evaluation device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0069] The embodiments of the present invention provide an offshore wind power hydrogen storage and transportation integrated energy system evaluation method and device, which is used to solve the technical problem of difficulty in accurately optimizing the system configuration of the integrated energy system due to the fluctuating characteristics of the output power of the offshore wind power plant and the complex source-load relationship of the wind-power-hydrogen-storage-transportation integrated energy system in the compression, storage, transportation and other links. When the system is in operation, the offshore wind power plant generates wind power, and part of the power is used for centralized hydrogen production at sea. The prepared hydrogen is stored in a nearby hydrogen storage pipe after passing through the compression system. The surplus wind power can charge the energy storage system. When the wind power used for hydrogen production is insufficient, the energy storage system can supply power to the hydrogen production system. When the wind power is excessive, the energy storage system can be charged and electricity can be sold online. The stored compressed hydrogen is transported to the shore by ship when the conditions for the transportation event are met. Due to the randomness of wind speed, the output power of the offshore wind farm is unstable. The alkaline water electrolysis hydrogen production system can only maintain efficient and safe operation under a relatively stable power input. Hydrogen production equipment is susceptible to reduced efficiency under frequent power fluctuations. Frequent starts and stops can even accelerate equipment aging and increase maintenance costs. Therefore, to address this contradiction, adding energy storage systems to offshore wind power hydrogen production systems can smooth wind power output, optimize hydrogen production efficiency, and improve system utilization.

[0070] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0071] See also Figure 1 , Figure 1A flowchart of the steps of an offshore wind power hydrogen storage and transportation integrated energy system evaluation method provided in an embodiment of the present invention.

[0072] The present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation method, which is applied to a control terminal that is communicatively connected to the offshore wind power hydrogen storage and transportation integrated energy system. The offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The method includes:

[0073] Step 101: In response to an evaluation request, obtain system cost data and wind speed data of the wind power system model at each moment in the evaluation period, interpolate the wind turbine power curve, and determine the output power of a single wind turbine;

[0074] System cost data refers to the costs of constructing multiple subsystems of an integrated offshore wind power, hydrogen storage, and transportation energy system. Subsystems may include, but are not limited to, a desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. This system cost data includes, but is not limited to, the total cost of the desalination system, the total cost of the energy storage system, the total cost of hydrogen compression, the total cost of hydrogen storage tanks, the total cost of hydrogen transportation, the total cost of hydrogen production, and the total cost of offshore wind power construction.

[0075] The wind speed data is the wind speed of a single wind turbine at time t during the evaluation period.

[0076] In an embodiment of the present invention, after receiving the evaluation request, the control end obtains system cost data and wind speed data of the wind power system model at each moment in the evaluation time period as a data basis for subsequent evaluation.

[0077] See also Figure 2 , Figure 2 Schematic diagram of a wind turbine power output curve in an embodiment of the present invention.

[0078] In the embodiment of the present invention, after obtaining the wind speed data at time t, the wind speed data is converted into the output power of a single wind turbine using linear interpolation. The specific linear interpolation process is as follows:

[0079]

[0080] in, is the output power of a single wind turbine at the current time t, which is active power; is the wind speed data at the current time t; and is the specific coordinate of the wind turbine in the wind turbine power output curve, representing the The output power of a single wind turbine at the wind speed at the location is ,exist The output power of a single wind turbine at the wind speed at the location is ; is the efficiency coefficient of the fan.

[0081] Step 102: determining the dispatchable power according to the output power of a single wind turbine, the desalination power consumption of the desalination system model, and the compression system power consumption of the hydrogen compression model;

[0082] In one example of the present invention, step 102 may include the following sub-steps:

[0083] Calculate the product of the number of wind turbines in the wind power system model and the output power of a single wind turbine to obtain the total wind power output power;

[0084] Calculating a first difference between the total wind power output power and the seawater desalination power consumption of the seawater desalination system model at a previous moment;

[0085] The difference between the first difference and the power consumption of the compression system of the hydrogen compression model at the current moment is calculated to obtain the dispatchable power at the current moment.

[0086] To facilitate subsequent power calculations, the following settings can be made for each model within the system: the remaining capacity of the hydrogen storage tank in the hydrogen storage and transportation model is 100%, that is, the SoH is 1. The SoC of the energy storage battery in the energy storage system is 1, and the electrolyte temperature of the alkaline hydrolysis hydrogen production system in the hydrogen production system model is at the rated operating temperature.

[0087] The power that can be allocated to each subsystem model is calculated using power balance. To ensure stable operation of the system, the wind farm output power will give priority to meeting the power required by the compression system after generating hydrogen at time t-1, and the power required by the seawater desalination system at time t is estimated according to the hydrogen production at time t-1, that is, the dispatchable power at time t. This power will be used for charging the energy storage system, powering the alkaline electrolysis hydrogen production system, and generating power on the grid under different working conditions. The calculation formula is as follows:

[0088]

[0089] in, is the number of wind turbines in the wind power system model, For the previous moment The power consumption of seawater desalination is is the power consumed by the compression system at the current time t.

[0090] It should be noted that the power consumption of seawater desalination can be calculated through the seawater desalination system model. Since the alkaline water electrolysis hydrogen production equipment has high requirements for water quality, directly using seawater for electrolysis will not only cause corrosion of electrodes and equipment, but also generate harmful by-products due to the presence of impurities and salts, which will not only reduce the electrolysis efficiency, but also affect the purity of hydrogen and increase maintenance costs. In this offshore wind power hydrogen production system, according to the hydrogen production reaction equation, 2 moles of water are required to prepare 2 moles of hydrogen, that is, 9 kg of water is consumed for every kilogram of hydrogen. Therefore, the power consumption of seawater desalination at time t is for:

[0091]

[0092] The electric power consumed by producing hydrogen at the current simulation moment (unit: ), that is, the power consumed by seawater desalination, is the energy consumption coefficient (unit: ), is the weight of hydrogen produced at simulation time t (in kg). Since the model is updated every 10 minutes, the formula is scaled accordingly.

[0093] At the same time, the hydrogen output by the alkaline water electrolysis hydrogen production equipment is stored after passing through the compression equipment. Before establishing the economic model of the hydrogen compression system, it is necessary to use the sliding window method to calculate the maximum hydrogen production per unit time period (such as per hour) during the simulation process. , as shown below:

[0094]

[0095] Then, the total number of hydrogen compression equipment that can meet the maximum hydrogen production per unit time is calculated by rounding up. , as shown below:

[0096]

[0097] Where, is the rated hydrogen compression rate of a single hydrogen compression device (unit: kg / hour). Therefore, the compression system power consumption of the hydrogen compression system for:

[0098]

[0099] in, is the energy consumption coefficient of the hydrogen compressor.

[0100] In this embodiment, after obtaining the dispatchable power, the remaining hydrogen storage capacity of the hydrogen storage and transportation model is used to determine whether the transportation event needs to be executed at the current moment and whether hydrogen production needs to continue. The energy storage charge state of the energy storage system is further combined to distinguish the usage of the dispatchable power. Combined with the rated hydrogen production power of the hydrogen production system model, the oxygen production amount and grid-connected electricity sales power at each moment in the evaluation time period are determined.

[0101] In this embodiment, the hydrogen storage and transportation model does not consider the type of hydrogen storage tanks. Its operation and economic characteristics are only related to the total number of hydrogen storage tanks. The remaining hydrogen storage capacity at time t is (State of Hydrogen) can be calculated as follows:

[0102]

[0103] Among them, j is the simulation time when the last transportation event occurred, is the rated capacity of a single hydrogen storage tank, in kilograms; is the number of hydrogen storage tanks, in pieces; is the weight of hydrogen produced at time t (in kg).

[0104] For the state of charge of the energy storage battery in the energy storage system model The calculation formula for the state of charge is as follows:

[0105]

[0106] in, is the output power of the energy storage converter at the simulation time t (in kW), is the energy storage battery capacity (in kWh).

[0107] Step 103: If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, the hydrogen production amount and grid-connected electricity sales power at each moment are determined based on the dispatchable power and the energy storage charge state of the energy storage system model;

[0108] In this embodiment, the energy storage system model is divided into two parts: the energy storage battery and the energy storage converter. The energy storage battery type, the rate of change limit of the energy storage converter output power, and the input / output power limits of the energy storage battery are ignored. If the remaining hydrogen storage capacity is zero, the SoH is 0 or close to 0, indicating that the hydrogen storage is full and meets transportation conditions. The alkaline electrolysis hydrogen production system stops hydrogen production. Except for charging the battery pack via the PCS (Power Conversion System, energy storage converter) when the energy storage system meets charging conditions, all remaining power is sold to the grid. When the SoC of the energy storage system model is 1, the energy storage converter within the energy storage system model is shut down. When the SoC is less than 1, the dispatchable power is used to charge the battery pack within the energy storage system model. Under these conditions, the dispatchable power is used to determine the power available for hydrogen production and the power available for grid sale.

[0109] In one example of the present invention, step 103 may include the following sub-steps S11-S14:

[0110] S11. Determine the distributable hydrogen production power and the energy storage system output power at each moment based on a comparison result of the energy storage charge state of the energy storage system model with a first preset value and in combination with the dispatchable power;

[0111] Optionally, S11 may include the following sub-steps:

[0112] determining the hydrogen production allocatable power of the hydrogen production system model as a second preset value;

[0113] If the energy storage state of charge of the energy storage system model is a first preset value, the energy storage system output power of the energy storage system model is determined to be a second preset value;

[0114] If the energy storage state of charge is less than the first preset value, determining whether the dispatchable power is less than the energy storage battery capacity of the energy storage system model;

[0115] If it is less than, the energy storage system output power of the energy storage system model is determined as the dispatchable power;

[0116] If it is not less than, the energy storage system output power of the energy storage system model is determined as the energy storage battery capacity.

[0117] In this embodiment, the above process can be implemented by the following process, wherein the first preset value is 1 and the second preset value is 0:

[0118] When the alkaline electrolysis hydrogen production system model stops producing hydrogen, that is, the hydrogen production power available at time t for:

[0119]

[0120] At this time, the output power of the energy storage system model at time t is have:

[0121]

[0122] in, is the capacity of the energy storage converter in the energy storage system model.

[0123] S12. Calculate the difference between the dispatchable power and the energy storage system output power to obtain the grid-connected power for sale at each moment;

[0124] The power sold to the grid at time t for:

[0125]

[0126] S13, determining the actual power consumption of hydrogen production according to the comparison result of the hydrogen production allocable power and the preset heating rated power;

[0127] See also Figure 3 , Figure 3 Schematic diagram of a hydrogen production system model in an embodiment of the present invention.

[0128] In this embodiment, if the distributable power for hydrogen production is greater than the preset rated power for heating, the actual power consumption for hydrogen production will be Determined as the heating rated power; if the hydrogen production distributable power is not greater than the preset heating rated power, the actual hydrogen production power consumption Determine the power allocable for hydrogen production.

[0129] In this embodiment, the actual power consumption of hydrogen production and the electrolyte temperature at each moment can be obtained through the above hydrogen production system model schematic diagram.

[0130] S14. The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

[0131] See also Figure 4 , Figure 4 Schematic diagram of a hydrogen production comprehensive efficiency curve of a hydrogen production system model ALE in an embodiment of the present invention.

[0132] In this embodiment, the ALE comprehensive efficiency curve is interpolated to obtain the ALE hydrogen production at the current time t. , the specific interpolation process is as follows:

[0133]

[0134]

[0135] in, is the actual power consumption of hydrogen production at time t, is the rated electrical power of the hydrogen production system model ALE, and They are the efficiency curve data points, that is, at the load rate In the case of , Similarly; is the ALE efficiency coefficient, is the weight of hydrogen produced at simulation time t (in kg), It is the conversion coefficient of hydrogen volume and mass at standard atmospheric pressure and room temperature.

[0136] Step 104: If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero, the hydrogen production capacity and grid-connected electricity sales power at each moment are determined based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model.

[0137] In this embodiment, if the remaining hydrogen storage capacity is not zero, it indicates that hydrogen production can continue and the transportation conditions are not met. The alkaline electrolysis hydrogen production system is given priority for power supply, and the rated power of the alkaline electrolysis hydrogen production system and the dispatchable power are compared. The relationship between and the SoC status of the energy storage battery determines the working status of the energy storage system model.

[0138] In one example of the present invention, step 104 may include the following sub-steps S21-S24:

[0139] S21. Determine the hydrogen production distributable power and the energy storage system output power at each moment based on a comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model, combined with the energy storage charge state of the energy storage system model;

[0140] Furthermore, S21 may include the following sub-steps S211-S215:

[0141] S211. Compare the dispatchable power and the hydrogen production rated power of the hydrogen production system model;

[0142] S212. If the dispatchable power is greater than the rated power of hydrogen production, the first product of the number of hydrogen production equipment in the hydrogen production system model and the rated capacity of the equipment is calculated as the dispatchable power of hydrogen production;

[0143] When dispatchable power When the hydrogen production power is greater than the rated power of the hydrogen production system model, the hydrogen production power available at time t is for:

[0144]

[0145] in, is the number of ALEs in the hydrogen production system model (unit: unit), It is the rated capacity of a single ALE (in kW).

[0146] S213. Determine the output power of the energy storage system according to the energy storage charge state of the energy storage system model, combined with the dispatchable power and the hydrogen production allocable power;

[0147] Optionally, S213 is implemented by the following process:

[0148]

[0149] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model.

[0150] S214. If the dispatchable power is not greater than the rated hydrogen production power, determine the output power of the energy storage system according to the first product value and the dispatchable power;

[0151] Optionally, S214 is implemented by the following process:

[0152]

[0153] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model, is the number of hydrogen production equipment, is the rated capacity of the hydrogen production equipment.

[0154] S215. Calculate the sum of the dispatchable power and the output power of the energy storage system to obtain the distributable power for hydrogen production;

[0155] In this embodiment, when the dispatchable power is not greater than the rated power of hydrogen production, the allocable power for hydrogen production is:

[0156]

[0157] S22. Determine the actual power consumption of hydrogen production according to the comparison result of the hydrogen production allocable power and the preset heating rated power;

[0158] S23. Calculate the difference between the dispatchable power, the actual power consumption of hydrogen production, and the output power of the energy storage system to obtain the grid-connected power for sale at each moment;

[0159] In this embodiment, after the actual hydrogen production power is calculated, the grid-connected electricity sales power is:

[0160]

[0161] S24. The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

[0162] The specific execution process of S22 and S24 can be found in S13-S14, which will not be repeated here.

[0163] Step 105 : Determine multiple system economic indicators based on the total hydrogen production, grid-connected electricity sales power, and cost data to evaluate the degree of system configuration optimization within the evaluation period.

[0164] In one example of the present invention, step 105 may include the following sub-steps:

[0165] After summing up all hydrogen production according to the evaluation time period, the ratio between the sum and the preset hydrogen production coefficient is calculated to obtain the total hydrogen production;

[0166] After calculating the second product of the total hydrogen production and the hydrogen selling price, calculate the difference between this and the hydrogen transportation cost to obtain the total hydrogen revenue;

[0167] After summing up all the on-grid electricity sales power according to the evaluation period, calculate the third multiplication value between it and the on-grid electricity price;

[0168] Calculate the ratio between the third multiplication value and the preset electricity price coefficient to obtain the total revenue from electricity sales;

[0169] Based on the total hydrogen revenue and total electricity sales revenue, combined with cost data, multiple system economic indicators are determined.

[0170] System economic indicators are used to assess the revenue and utilization of an offshore wind power, hydrogen storage, and transportation integrated energy system under its current configuration over an evaluation period. This allows users to adaptively optimize the configuration of various system models within the system based on these indicators. These indicators can include various types, including but not limited to total hydrogen production, total hydrogen revenue, total electricity consumed for hydrogen production, total electricity sales revenue, total investment cost, total net revenue, total return on investment, and hydrogen production system utilization.

[0171] For the total hydrogen production (in kg), the power consumed by the alkaline electrolysis hydrogen production system at the simulation time t is obtained. Then, the hydrogen production at simulation time t is obtained through its efficiency curve (in liters), and after the simulation is completed at each moment of the evaluation period, the total hydrogen production is calculated using the following formula: :

[0172]

[0173] For the total revenue of hydrogen (in ten thousand yuan), the total revenue of hydrogen after deducting transportation costs is Calculated as follows:

[0174]

[0175] in, is the selling price of hydrogen, is the total cost of hydrogen transportation.

[0176] It should be noted that in this offshore wind power hydrogen storage and transportation integrated energy system, the hydrogen production system model is an alkaline electrolysis hydrogen production system model. The hydrogen produced by the alkaline electrolysis hydrogen production system passes through a compression system and is stored in a hydrogen storage tank. After meeting specific conditions (such as the remaining capacity of the hydrogen storage tank is zero, or a transportation event occurs at a fixed interval), the stored hydrogen is transported to shore by ship. For ease of analysis, in this example, the single shipping cost is independent of the weight of the transported hydrogen and is a fixed value. The time it takes to transport the hydrogen from the hydrogen storage tank to the ship is negligible, and there is no hydrogen storage loss in the hydrogen storage tank system.

[0177] In this model, the prepared hydrogen transportation process is divided into two modes: fixed interval transportation and dynamic interval transportation for analysis. When the fixed interval transportation mode is adopted, the interval between each transportation event is a fixed value. (The unit is the same as the time t of the evaluation period), so the total number of transports during the simulation is The calculation formula is as follows:

[0178]

[0179] in, is the total simulation length, i.e. the evaluation period.

[0180] When the dynamic interval transport mode is used, the trigger condition for the transport event is the remaining capacity of the hydrogen storage tank. is 0, so the total number of transports It can only be obtained statistically through simulation.

[0181] In summary, the total cost of hydrogen transportation can be calculated as follows:

[0182]

[0183] in, is the total cost of hydrogen transportation, For single transportation cost.

[0184] Total electricity consumption for hydrogen production (unit: kWh), which is calculated as follows:

[0185]

[0186] in, is the electrical power consumed by hydrogen production at the simulation time t, that is, the actual power consumed by hydrogen production, and N is the maximum value of the evaluation time period.

[0187] For total revenue from electricity sales (Unit is ten thousand yuan), the calculation process is as follows:

[0188]

[0189] in, is the on-grid electricity price (unit: 10,000 yuan / kWh),

[0190] For the total investment cost , which can be obtained and calculated through cost data. In this embodiment, the cost data may include but is not limited to the cost of hydrogen production system equipment, the cost of offshore wind farm construction, the total expenditure cost of the seawater desalination system, the total expenditure cost of hydrogen compression equipment, the total cost of hydrogen storage tanks, and the total cost of the energy storage system.

[0191] The total cost of the seawater desalination system can be calculated as follows:

[0192]

[0193] in, is the total cost of the seawater desalination system (in ten thousand yuan), is the electricity price (unit: 10,000 yuan / kWh), is the fixed equipment investment cost (in ten thousand yuan), The cumulative interval is 1~N.

[0194] The total outlay cost of hydrogen compression equipment can be calculated as follows:

[0195]

[0196] in, is the total expenditure cost of hydrogen compression equipment (in ten thousand yuan), is the cost of a single hydrogen compression equipment (in ten thousand yuan), with the cumulative range being 1~N.

[0197] Total cost of hydrogen storage tank It can be calculated as follows:

[0198]

[0199] Among them, is the number of hydrogen storage tanks (in pieces), is the cost of a single hydrogen storage tank (unit: 10,000 yuan).

[0200] Total cost of energy storage system It can be calculated as follows:

[0201]

[0202] in, is the energy storage battery capacity (in kWh), is the energy storage battery cost coefficient (unit: 10,000 yuan / kWh), is the capacity of the energy storage converter (in kW), is the cost coefficient of the energy storage converter (unit: 10,000 yuan / kWh).

[0203] After obtaining the above data, the total investment cost (in ten thousand yuan) can be calculated as follows:

[0204]

[0205] Among them, the cost of hydrogen production system equipment can be express, is the number of single alkaline electrolysis hydrogen production systems (unit: unit), The cost of a single unit (unit: unit / 10,000 yuan); the construction cost of an offshore wind farm can be express, is the total capacity of the offshore wind farm (unit: kW), is the construction cost coefficient of offshore wind farm (unit: kW / 10,000 yuan).

[0206] The total net income (in ten thousand yuan) can be calculated as follows:

[0207]

[0208] The total return on investment (in percentage) can be calculated as follows:

[0209]

[0210] For the utilization rate of the hydrogen production system (in percentage), taking the total evaluation period of 30 days as an example, the ratio of the actual total mass of hydrogen produced by the alkaline electrolysis hydrogen production system to the theoretical total mass of hydrogen produced is calculated as follows:

[0211]

[0212] In addition, for the model system parameters not described above in the embodiments of the present invention, please refer to Table 1 below:

[0213]

[0214] In this embodiment, by calculating the above-mentioned system economic indicators, the operating status of the offshore wind power hydrogen storage and transportation integrated energy system during the evaluation period can be accurately known. By constructing a gradient table of the configuration parameters of each system model, the system model can be improved and re-evaluated according to each group of configuration parameters to select the configuration parameters with the highest utilization rate and economic benefits.

[0215] In the specific implementation, to make it easier for users to understand, an example of simulating an offshore wind power hydrogen storage and transportation integrated energy system according to the evaluation time period can be provided:

[0216] In the simulation, the energy storage converter's SoC range was set to 0.3 to 1. When the ALE did not reach rated power, the energy storage system output power through the PCS. Only when the ALE reached rated power did the PCS use excess power from the wind farm to charge the energy storage battery. The generated hydrogen was compressed and stored in tanks, then transported to its destination via a five-day sea freight schedule. The simulation scenario is shown in Table 2 below:

[0217]

[0218] After running this method for simulation, the simulation results are shown in Table 3 below:

[0219]

[0220] After adding the 5MWh energy storage system, the utilization rate of the electrolysis hydrogen production system is 66.6767%, and transportation events occur 6 times per month. However, due to the large capacity of the hydrogen storage system, it is always in a state of not being full, and the ALE does not stop working. In this scenario, the capacity of the hydrogen storage system is as follows: Figure 5 As shown, the horizontal axis is the event and the vertical axis is the hydrogen storage capacity. It can be seen that the hydrogen storage capacity has steadily increased and stably triggered hydrogen transportation, and the ALE has not stopped working.

[0221] The SoC curve of the energy storage system is as follows: Figure 6 As shown, the horizontal axis is time and the vertical axis is SoC. It can be seen that after adding the energy storage system, it can dynamically adjust to different load demands in a short time, and at the same time, it does not exceed the upper and lower limits of charge and discharge during the charging and discharging process.

[0222] The total output power of the wind farm and the power consumed by ALE are as follows: Figure 7 As shown in the figure, the horizontal axis represents time, and the vertical axis represents the output active power of the wind system model. It can be seen that both hydrogen production power and total power fluctuate significantly throughout the entire time period. This fluctuation may be related to the variability of wind resources at the wind farm. Unstable wind conditions can lead to variations in wind farm output power. The fact that hydrogen production power is generally lower than total power suggests that the wind power system model may be exporting some of its electricity to the energy storage system and hydrogen compression system.

[0223] ALE electrolyte temperature Figure 8 As shown, it can be seen that the temperature of the electrolyzer is in a stable state for most of the time, which is more conducive to the occurrence of the electrolytic hydrogen production process.

[0224] See also Figure 9 , Figure 9 A flow chart of a method for evaluating an offshore wind power hydrogen storage and transportation integrated energy system provided in an embodiment of the present invention.

[0225] In this embodiment, the model parameters of all system models in the offshore wind power hydrogen storage and transportation integrated energy system are initialized first; the wind speed V[t] at time t is obtained, and the wind farm output power at time t is calculated; the seawater desalination power consumption at time t-1 is calculated; the compression system power consumption at time t-1 is calculated; the remaining capacity SoH[t] of the hydrogen storage system is calculated; the state of charge SoC[t] of the energy storage system is calculated; and the dispatchable power P is calculated. dispatch[t] ; Determine whether the transportation conditions are met according to the remaining capacity of the hydrogen storage system; if so, the hydrogen storage system SoH=1, and the transportation event is accumulated; if not, determine whether the hydrogen storage tank capacity has SoH=1; if so, calculate the energy storage and hydrogen production system rate P ALE[t] and PPCS[t]; calculate the online power P grid[t] ; If SoH is not equal to 1, then judge P dispatch[t ]>N ALE *C ALE ; According to the judgment results, call different formulas to calculate the energy storage and hydrogen production system rate P ALE[t] With P PCS[t] and Internet power P grid[t] ; After the calculation is completed, the above data is transmitted to the hydrogen production system model to calculate the hydrogen production amount; determine whether the simulation is completed; if it is not completed, set t=t+1, repeat the execution to obtain the wind speed V[t] at time t, calculate the wind farm output power at time t and the following steps; if it is completed, use the hydrogen production, grid-connected power and other related power calculation system economic indicators to accurately evaluate the system configuration.

[0226] In an embodiment of the present invention, the control end responds to the evaluation request, obtains the system cost data and the wind speed data of the wind power system model at each moment in the evaluation time period, and interpolates the wind turbine power curve to determine the output power of a single wind turbine; determines the dispatchable power according to the output power of the single wind turbine, the desalination power consumption of the seawater desalination system model, and the compression system consumption power of the hydrogen compression model; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, then determines the hydrogen production amount and the grid-connected power sales power at each moment according to the dispatchable power and the energy storage charge state of the energy storage system model; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero, then determines the hydrogen production amount and the grid-connected power sales power at each moment according to the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model; determines multiple system economic indicators according to the total hydrogen production amount, grid-connected power sales power, and cost data to evaluate the degree of system configuration optimization within the evaluation time period. By simulating the system, the corresponding system economic indicators are obtained, and the system configuration of the integrated energy system is more accurately optimized.

[0227] See also Figure 10 , Figure 10 This is a structural block diagram of an offshore wind power hydrogen storage and transportation integrated energy system evaluation device in an embodiment of the present invention.

[0228] The present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation device, which is applied to a control terminal connected to the offshore wind power hydrogen storage and transportation integrated energy system. The offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The device includes:

[0229] The wind speed processing module 901 is used to respond to the evaluation request, obtain the system cost data and the wind speed data of the wind power system model at each moment in the evaluation period, and interpolate the wind turbine power curve to determine the output power of a single wind turbine;

[0230] The dispatchable power calculation module 902 is used to determine the dispatchable power according to the output power of a single wind turbine, the desalination power consumption of the desalination system model, and the compression system power consumption of the hydrogen compression model;

[0231] The first hydrogen production and electricity sales module 903 is used to determine the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero;

[0232] The second hydrogen production and electricity sales module 904 is used to determine the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero;

[0233] The system economic index determination module 905 is used to determine multiple system economic indicators according to the total hydrogen production, grid-connected electricity sales power and cost data to evaluate the degree of system configuration optimization within the evaluation period.

[0234] Optionally, the schedulable power calculation module 902 is specifically configured to:

[0235] Calculate the product of the number of wind turbines in the wind power system model and the output power of a single wind turbine to obtain the total wind power output power;

[0236] Calculating a first difference between the total wind power output power and the seawater desalination power consumption of the seawater desalination system model at a previous moment;

[0237] The difference between the first difference and the power consumption of the compression system of the hydrogen compression model at the current moment is calculated to obtain the dispatchable power at the current moment.

[0238] Optionally, the first hydrogen production and electricity sales module 903 includes:

[0239] A first allocable power calculation submodule is configured to determine the allocable hydrogen production power and the energy storage system output power at each moment in accordance with a comparison result of the energy storage charge state of the energy storage system model with a first preset value and in combination with the dispatchable power;

[0240] The first electricity sales power calculation submodule is used to calculate the difference between the dispatchable power and the output power of the energy storage system to obtain the on-grid electricity sales power at each moment;

[0241] The first power consumption calculation submodule is used to determine the actual power consumption of hydrogen production according to the comparison result of the hydrogen production allocable power and the preset heating rated power;

[0242] The first hydrogen production amount calculation submodule is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model using the actual power consumption of hydrogen production to determine the hydrogen production amount at each moment.

[0243] Optionally, the first allocatable power calculation submodule is specifically configured to:

[0244] determining the hydrogen production allocatable power of the hydrogen production system model as a second preset value;

[0245] If the energy storage state of charge of the energy storage system model is a first preset value, the energy storage system output power of the energy storage system model is determined to be a second preset value;

[0246] If the energy storage state of charge is less than the first preset value, determining whether the dispatchable power is less than the energy storage battery capacity of the energy storage system model;

[0247] If it is less than, the energy storage system output power of the energy storage system model is determined as the dispatchable power;

[0248] If it is not less than, the energy storage system output power of the energy storage system model is determined as the energy storage battery capacity.

[0249] Optionally, the second hydrogen production and electricity sales module 904 includes:

[0250] The second allocable power calculation submodule is used to determine the allocable hydrogen production power and the energy storage system output power at each moment based on the comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model, combined with the energy storage charge state of the energy storage system model;

[0251] The second power consumption calculation submodule is used to determine the actual power consumption of hydrogen production according to the comparison result of the hydrogen production allocable power and the preset heating rated power;

[0252] The second electricity sales power calculation submodule is used to calculate the difference between the dispatchable power and the actual hydrogen production power consumption and the output power of the energy storage system to obtain the grid-connected electricity sales power at each moment;

[0253] The second hydrogen production amount calculation submodule is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model using the actual power consumption of hydrogen production to determine the hydrogen production amount at each moment.

[0254] Optionally, the second allocable power calculation submodule specifically includes:

[0255] a comparison unit, used for comparing the dispatchable power and the hydrogen production rated power of the hydrogen production system model;

[0256] A first allocable power calculation unit is configured to calculate, if the dispatchable power is greater than the rated hydrogen production power, a first product of the number of hydrogen production equipment in the hydrogen production system model and the rated capacity of the equipment as the allocable hydrogen production power;

[0257] A first energy storage power calculation unit is used to determine the output power of the energy storage system according to the energy storage charge state of the energy storage system model, combined with the dispatchable power and the hydrogen production allocable power;

[0258] a second energy storage power calculation unit, configured to determine the output power of the energy storage system according to the first product value and the dispatchable power if the dispatchable power is not greater than the rated power of hydrogen production;

[0259] The second distributable power calculation unit is used to calculate the sum of the dispatchable power and the output power of the energy storage system to obtain the hydrogen production distributable power.

[0260] Optionally, the first energy storage power calculation unit is specifically configured to:

[0261]

[0262] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model.

[0263] Optionally, the second energy storage power calculation unit is specifically configured to:

[0264]

[0265] in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model, is the number of hydrogen production equipment, is the rated capacity of the hydrogen production equipment.

[0266] Optionally, the system economic index determination module 905 is specifically configured to:

[0267] After summing up all hydrogen production according to the evaluation time period, the ratio between the sum and the preset hydrogen production coefficient is calculated to obtain the total hydrogen production;

[0268] After calculating the second product of the total hydrogen production and the hydrogen selling price, calculate the difference between this and the hydrogen transportation cost to obtain the total hydrogen revenue;

[0269] After summing up all the on-grid electricity sales power according to the evaluation period, calculate the third multiplication value between it and the on-grid electricity price;

[0270] Calculate the ratio between the third multiplication value and the preset electricity price coefficient to obtain the total revenue from electricity sales;

[0271] Based on the total hydrogen revenue and total electricity sales revenue, combined with cost data, multiple system economic indicators are determined.

[0272] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and modules can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0273] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0274] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected to achieve the purpose of the present embodiment according to actual needs.

[0275] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for evaluating an offshore wind power hydrogen storage and transportation integrated energy system, characterized in that: A control terminal is applied to a communication connection with an offshore wind power hydrogen storage and transportation integrated energy system, wherein the offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The method includes: In response to the evaluation request, obtaining system cost data and wind speed data of the wind power system model at each moment in the evaluation time period, and interpolating the wind turbine power curve to determine the output power of a single wind turbine; Determining the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model; If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, the hydrogen production amount and the grid-connected electricity sales power at each moment are determined according to the dispatchable power and the energy storage charge state of the energy storage system model; If the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero, the hydrogen production amount and the grid-connected electricity sales power at each moment are determined according to the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model; Determining a plurality of system economic indicators according to the total hydrogen production, the grid-connected electricity sales power, and the cost data to evaluate the degree of system configuration optimization within the evaluation time period; The determining of the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model includes: Calculating the product of the number of wind turbines in the wind power system model and the output power of the single wind turbine to obtain the total wind power output power; Calculating a first difference between the total wind power output power and the seawater desalination power consumption of the seawater desalination system model at a previous moment; Calculating the difference between the first difference and the compression system power consumption of the hydrogen compression model at the current moment to obtain the dispatchable power at the current moment; The method of determining the hydrogen production amount and the grid-connected electricity sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model includes: Determining the hydrogen production distributable power and the energy storage system output power at each moment according to a comparison result of the energy storage charge state of the energy storage system model with a first preset value and in combination with the dispatchable power; Calculating the difference between the dispatchable power and the output power of the energy storage system to obtain the grid-connected power for sale at each moment; Determining the actual power consumption of hydrogen production according to a comparison result of the hydrogen production allocable power and the preset heating rated power; The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

2. The method according to claim 1, characterized in that The determining of the hydrogen production distributable power and the energy storage system output power at each moment according to the comparison result of the energy storage charge state of the energy storage system model with the first preset value and in combination with the dispatchable power includes: determining the hydrogen production allocatable power of the hydrogen production system model as a second preset value; If the energy storage state of charge of the energy storage system model is a first preset value, the energy storage system output power of the energy storage system model is determined to be a second preset value; If the energy storage state of charge is less than a first preset value, determining whether the dispatchable power is less than the energy storage battery capacity of the energy storage system model; If it is less than, the energy storage system output power of the energy storage system model is determined as the dispatchable power; If not, the energy storage system output power of the energy storage system model is determined as the energy storage battery capacity.

3. The method according to claim 1, characterized in that The determining of the hydrogen production amount and the grid-connected electricity sales power at each moment according to the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model includes: Determine the hydrogen production distributable power and the energy storage system output power at each moment according to a comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model, combined with the energy storage charge state of the energy storage system model; Determining the actual power consumption of hydrogen production according to a comparison result of the hydrogen production allocable power and the preset heating rated power; Calculating the difference between the dispatchable power, the actual power consumption of hydrogen production, and the output power of the energy storage system to obtain the grid-connected power for sale at each moment; The actual power consumption of hydrogen production is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model to determine the amount of hydrogen produced at each moment.

4. The method according to claim 3, characterized in that The method of determining the hydrogen production distributable power and the energy storage system output power at each moment according to the comparison result of the dispatchable power and the hydrogen production rated power of the hydrogen production system model in combination with the energy storage charge state of the energy storage system model includes: comparing the dispatchable power with the hydrogen production rated power of the hydrogen production system model; If the dispatchable power is greater than the hydrogen production rated power, a first product of the number of hydrogen production equipment in the hydrogen production system model and the rated capacity of the equipment is calculated as the hydrogen production allocable power; Determining the output power of the energy storage system according to the energy storage charge state of the energy storage system model, combined with the dispatchable power and the hydrogen production allocable power; If the dispatchable power is not greater than the hydrogen production rated power, determining the output power of the energy storage system according to the first multiplier and the dispatchable power; The sum of the dispatchable power and the output power of the energy storage system is calculated to obtain the hydrogen production allocable power.

5. The method according to claim 4, characterized in that The determining the output power of the energy storage system according to the energy storage state of charge of the energy storage system model, in combination with the dispatchable power and the hydrogen production allocable power, includes: ； in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model.

6. The method according to claim 4, characterized in that The determining the output power of the energy storage system according to the first multiplier and the dispatchable power includes: ； in, is the output power of the energy storage system at time t, is the dispatchable power at time t, is the allocable power for hydrogen production at time t, is the energy storage charge state of the energy storage system model, is the energy storage converter capacity of the energy storage system model, is the number of hydrogen production equipment, is the rated capacity of the hydrogen production equipment.

7. The method according to claim 1, characterized in that Determining multiple system economic indicators based on the total hydrogen production, the grid-connected electricity sales power, and the cost data includes: After summing up all the hydrogen production amounts according to the evaluation time period, calculating the ratio between the sum and the preset hydrogen production coefficient to obtain the total hydrogen production amount; After calculating the second product of the total hydrogen production amount and the hydrogen selling price, the difference between the total hydrogen production amount and the hydrogen transportation cost is calculated to obtain the total hydrogen revenue; After summing up all the on-grid electricity sales power according to the evaluation time period, calculating a third multiplication value between the sum and the on-grid electricity price; Calculating the ratio between the third multiplication value and the preset electricity price coefficient to obtain the total revenue from electricity sales; According to the total hydrogen revenue and the total electricity sales revenue, combined with the cost data, a plurality of system economic indicators are determined.

8. An offshore wind power hydrogen storage and transportation integrated energy system evaluation device, characterized in that: A control terminal for communication with an offshore wind power hydrogen storage and transportation integrated energy system, wherein the offshore wind power hydrogen storage and transportation integrated energy system includes a seawater desalination system model, a hydrogen production system model, a wind power system model, an energy storage system model, a hydrogen storage and transportation model, and a hydrogen compression model. The device includes: a wind speed processing module, configured to respond to an evaluation request, obtain system cost data and wind speed data of the wind power system model at each moment within an evaluation period, and interpolate a wind turbine power curve to determine a single wind turbine output power; a dispatchable power calculation module, configured to determine the dispatchable power according to the output power of the single wind turbine, the seawater desalination power consumption of the seawater desalination system model, and the compression system power consumption of the hydrogen compression model; a first hydrogen production and electricity sales module, configured to determine the hydrogen production amount and the grid-connected electricity sales power at each moment based on the dispatchable power and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero; The second hydrogen production and electricity sales module is used to determine the hydrogen production amount and grid-connected electricity sales power at each moment based on the dispatchable power, the hydrogen production rated power of the hydrogen production system model, and the energy storage charge state of the energy storage system model if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero; a system economic index determination module, configured to determine a plurality of system economic indicators according to the total hydrogen production, the grid-connected electricity sales power, and the cost data, so as to evaluate the degree of system configuration optimization within the evaluation time period; The dispatchable power calculation module is specifically used for: Calculating the product of the number of wind turbines in the wind power system model and the output power of the single wind turbine to obtain the total wind power output power; Calculating a first difference between the total wind power output power and the seawater desalination power consumption of the seawater desalination system model at a previous moment; Calculating the difference between the first difference and the compression system power consumption of the hydrogen compression model at the current moment to obtain the dispatchable power at the current moment; The first hydrogen production and electricity sales module includes: A first allocable power calculation submodule is configured to determine the allocable hydrogen production power and the energy storage system output power at each moment in accordance with a comparison result of the energy storage state of charge of the energy storage system model with a first preset value and in combination with the dispatchable power; A first electricity sales power calculation submodule is used to calculate the difference between the dispatchable power and the output power of the energy storage system to obtain the on-grid electricity sales power at each moment; A first power consumption calculation submodule is configured to determine the actual power consumption of hydrogen production according to a comparison result of the hydrogen production allocable power and the preset heating rated power; The first hydrogen production amount calculation submodule is used to interpolate the hydrogen production comprehensive efficiency curve of the hydrogen production system model using the actual hydrogen production power consumption to determine the hydrogen production amount at each moment.

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