Offshore wind power hydrogen storage and transportation integrated energy system evaluation method and device

Abstract

The invention discloses an evaluation method and device for an offshore wind power hydrogen storage and transportation integrated energy system, and the method comprises the steps: obtaining system cost data and wind speed data through a control end in response to an evaluation request, carrying out the interpolation of a fan power curve, and determining the output power of a single fan; according to the output power of the single fan, the seawater desalination consumption power and the compression system consumption power, determining adjustable power; if the hydrogen storage residual capacity is zero, the hydrogen production amount and the online electricity selling power at each moment are determined according to the schedulable power and the energy storage charge state; and if the hydrogen storage residual capacity is not zero, determining the hydrogen production amount and the online electricity selling power at each moment according to the schedulable power, the hydrogen production rated power and the energy storage charge state, and determining a plurality of system economic indexes so as to evaluate the system configuration optimization degree in the evaluation time period. The system is subjected to analogue simulation, so that corresponding system economic indexes are obtained, and the system configuration of the comprehensive energy system is optimized more accurately.

Description

Technical Field

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

[0002] With the continuous pursuit of clean energy around the world, the optimization of wind power energy systems has been continuously improved. However, due to the inherent volatility of wind power and the limitations of current grid connection technology and capacity, the phenomenon of wind power curtailment and power rationing is still extremely serious. A large amount of wind energy resources have not been effectively utilized, resulting in serious waste of energy and hindering the sustainable development of the wind power industry.

[0003] In order to effectively utilize wind power resources, "wind power hydrogen production" has become an innovative solution. Through wind power coupling hydrogen production, wind power can be consumed on site, and hydrogen energy storage can be used to achieve large-scale, long-term storage of renewable energy, effectively solving the problems caused by the intermittent and unstable nature of wind energy, and greatly improving the comprehensive 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, which affects the compression, storage, and transportation 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 that it is difficult to accurately optimize the system configuration of the integrated energy system due to the fluctuation characteristics of the output power of the offshore wind power plant and the complex source-load relationship of the wind-electricity-hydrogen-storage-transportation integrated energy system on the compression, storage, transportation and other 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, 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:

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

[0008] 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;

[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 optimization of the system configuration 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] Calculate 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 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.

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

[0017] According to the comparison result of the energy storage charge state of the energy storage system model and the first preset value, combined with the dispatchable power, the hydrogen production allocable power and the energy storage system output power at each moment are determined;

[0018] Calculate 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 the 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 allocable 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 in combination with 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 charge state 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 charge state 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 output power of the energy storage system of the energy storage system model is determined as the dispatchable power;

[0026] 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.

[0027] Optionally, determining the hydrogen production amount and 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:

[0028] According to 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, determine the hydrogen production distributable power and the energy storage system output power at each moment;

[0029] 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;

[0030] 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;

[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, 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 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 rated power of hydrogen production, 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 allocable power for hydrogen production;

[0035] 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;

[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 charge state 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 multiplier 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, the ratio between the sum and the preset hydrogen production coefficient is calculated to obtain the total hydrogen production amount;

[0046] After calculating the second multiplication value between 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 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 that is communicatively connected to the offshore wind power hydrogen storage and transportation integrated energy system, wherein the offshore wind power hydrogen storage and transportation integrated energy system comprises 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, and the device comprises:

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

[0052] A dispatchable power calculation module, used 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] The first hydrogen production and electricity sales module is used to determine the hydrogen production amount and the grid-connected electricity 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 zero;

[0054] The second hydrogen production and electricity sales module is used to determine 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 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 indexes 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 responds to the evaluation request through the control end, 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; according to the output power of a single wind turbine, the desalination power consumption of the seawater desalination system model and the compression system power consumption of the hydrogen compression model, the dispatchable power is determined; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, the hydrogen production and online power 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 and online power 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; according to the total hydrogen production, online power sales power and cost data, 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 comprehensive 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0059] Figure 1 A flowchart of the steps of an offshore wind power hydrogen storage and transportation integrated energy system evaluation method 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 A schematic diagram of a hydrogen production system model in an embodiment of the present invention;

[0062] Figure 4 A 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 schematic diagram of a hydrogen storage system provided by 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 consumption of ALE provided in an embodiment of the present invention;

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

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

[0068] Fig.10 A structural block diagram of an offshore wind power hydrogen storage and transportation integrated energy system evaluation device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0069] The embodiment of the present invention provides an offshore wind power hydrogen storage and transportation integrated energy system evaluation method and device, which is used to solve the technical problem that it is difficult to accurately optimize the system configuration of the integrated energy system due to the fluctuation characteristics of the output power of the offshore wind power plant and the complex source-load relationship of the wind-electricity-hydrogen-storage-transportation integrated energy system in the compression, storage, transportation and other links. When the system is running, 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 the nearest hydrogen storage pipe after passing through the compression system. The remaining 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 redundant, 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 of 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 prone to efficiency decline under frequent power fluctuations, and may even accelerate equipment aging and increase maintenance costs due to frequent starts and stops. Therefore, in order to resolve this contradiction, an energy storage system is added to the offshore wind power hydrogen production system to 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 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, obtaining system cost data and wind speed data of a wind power system model at each moment in an evaluation period, and interpolating a wind turbine power curve to determine a single wind turbine output power;

[0074] System cost data refers to the cost of multiple subsystems for constructing an offshore wind power hydrogen storage and transportation integrated energy system. The 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. The 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 the embodiment of the present invention, after the control end receives the evaluation request, the system cost data and the wind speed data of the wind power system model at each moment in the evaluation time period are obtained as the 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 the wind speed data at time t is obtained, the wind speed data is converted into the output power of a single wind turbine by linear interpolation. The specific linear interpolation process is:

[0079]

[0080] in, is the output power of a single fan 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 output power of a single fan at the wind speed at the location is ,exist The output power of a single fan 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 seawater desalination power consumption of the seawater 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 number of wind turbines in the wind power system model and the multiplication value of 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 various models in the system can be set as follows: 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 balance is used to calculate the power that can be allocated to each subsystem model. To ensure the 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 electricity 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, the direct use of seawater 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 per kilogram of hydrogen. Therefore, the power consumption of seawater desalination at time t is for:

[0091]

[0092] The electrical power consumed by preparing hydrogen at the current simulation time (in units of ), 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 proportionally transformed 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] In the formula, 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 hydrogen production rated power of the hydrogen production system model, the oxygen production 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 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 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;

[0108] In this embodiment, the energy storage system model is divided into two parts: energy storage battery and energy storage converter. The type of energy storage battery is ignored, the change rate limit of the output power of the energy storage converter is ignored, and the input / output power limit of the energy storage battery is ignored. If the remaining capacity of the hydrogen storage is zero, SoH is 0 or close to 0 at this time, indicating that the hydrogen storage is full at this time and meets the transportation conditions. The alkaline electrolysis hydrogen production system stops hydrogen production, and the dispatchable power is used to charge the battery pack through PCS (Power Conversion System, energy storage converter) when the energy storage system meets the charging conditions. The remaining power is all sold online. When the SoC of the energy storage system model is 1, the energy storage converter in the energy storage system model is shut down, and when SoC <1, the dispatchable power is used to charge the battery pack in the energy storage system model. Under this condition, the dispatchable power is used as the basis to determine the distributable power for hydrogen production and the power for selling electricity online.

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

[0110] S11, according to the comparison result of the energy storage charge state of the energy storage system model and the first preset value, combined with the dispatchable power, determine the hydrogen production allocable power and the energy storage system output power at each moment;

[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 charge state 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 charge state 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 output power of the energy storage system 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 hydrogen production system model of alkaline electrolysis stops producing hydrogen, that is, the available power for hydrogen production at time t is for:

[0119]

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

[0121]

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

[0123] S12, 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;

[0124] The grid-connected power sold 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 allocable power for hydrogen production is greater than the preset rated power for heating, the actual power consumption for hydrogen production is Determined as the heating rated power; if the distributable power for hydrogen production is not greater than the preset heating rated power, the actual power consumption for hydrogen production 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 It is a 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 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;

[0137] In this embodiment, if the remaining hydrogen storage capacity is not zero, it indicates that hydrogen production can continue at this time, and the transportation conditions are not met. The alkaline electrolysis hydrogen production system is given priority, 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 an example of the present invention, step 104 may include the following sub-steps S21-S24:

[0139] S21, according to 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, determine the hydrogen production distributable power and the energy storage system output power at each moment;

[0140] Further, 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 ALE in the hydrogen production system model (unit), It is the rated capacity of a single ALE (in kW).

[0146] S213, 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;

[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 power of hydrogen production, the output power of the energy storage system is determined 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, calculating 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 of hydrogen production is:

[0156]

[0157] S22, 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;

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

[0159] In this embodiment, after the actual power of hydrogen production is calculated, the power sold to the grid 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] Among them, the specific execution process of S22 and S24 can be found in S13-S14, which will not be repeated here.

[0163] Step 105, according to the total hydrogen production, grid-connected electricity sales power and cost data, multiple system economic indicators are determined 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 multiplication value between the total hydrogen production and the hydrogen selling price, calculate the difference between the total hydrogen production 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 electricity sales revenue;

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

[0170] System economic indicators refer to the indicator data used to evaluate the revenue and utilization rate of the offshore wind power hydrogen storage and transportation integrated energy system under the current configuration during the evaluation period, so that users can adaptively optimize the configuration of each system model in the system according to the indicators. Its indicators can include various types, including but not limited to total hydrogen production, total hydrogen revenue, total electricity consumption for hydrogen production, total electricity sales revenue, total investment cost, total net income, total investment return rate and hydrogen production system utilization rate.

[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, that is, after each moment of the evaluation period is calculated, the total hydrogen production is calculated using the following formula :

[0172]

[0173] For the total hydrogen revenue (in 10,000 yuan), the total hydrogen revenue after deducting the transportation cost 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 prepared by the alkaline electrolysis hydrogen production system is stored in the hydrogen storage tank after passing through the compression system, and 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 the shore by ship. For the convenience of analysis, in this embodiment, the single shipping cost is independent of the weight of the transported hydrogen, the single shipping cost is a fixed value, the time for hydrogen to be transported 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 adopted, the trigger condition of 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 a single shipping cost.

[0184] Total electricity consumption for hydrogen production (in 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] Total revenue from electricity sales (Unit: 10,000 yuan), the calculation process is as follows:

[0188]

[0189] in, is the on-grid electricity price (in ten thousand 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 equipment cost of the hydrogen production system, the construction cost of the offshore wind farm, the total expenditure cost of the seawater desalination system, the total expenditure cost of the hydrogen compression equipment, the total cost of the hydrogen storage tank and the total cost of the energy storage system.

[0191] Among them, the total expenditure cost of the seawater desalination system can be calculated in the following way:

[0192]

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

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

[0195]

[0196] in, is the total cost of hydrogen compression equipment (in ten thousand yuan), is the cost of a single hydrogen compression equipment (in ten thousand yuan), and the cumulative range is 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 (in ten thousand yuan / kWh).

[0203] After calculating the above data, the total investment cost (in ten thousand yuan) can be calculated in the following way:

[0204]

[0205] Among them, the equipment cost of hydrogen production system 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 10,000 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 the following Table 1:

[0213]

[0214] In this embodiment, by calculating the above-mentioned system economic indicators, the operation 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, in order to make it easier for users to understand, an example of simulating the offshore wind power hydrogen storage and transportation integrated energy system according to the evaluation time period can be given:

[0216] In the simulation, the allowed range of the energy storage inverter SoC is set to 0.3 to 1. When ALE does not reach the rated power, the energy storage system outputs power through the PCS, and only when ALE reaches the rated power, the remaining power output by the wind farm is used to charge the energy storage battery through the PCS. The prepared hydrogen is compressed and stored in a gas tank, and transported to the destination through a sea transportation plan with a cycle of 5 days / time. 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 electrolytic hydrogen production system is 66.6767%, and the transportation incidents are caused 6 times per month. However, due to the large capacity of the hydrogen storage system, it is always not full, and the ALE does not stop working. Figure 5 As shown, the horizontal axis represents events and the vertical axis represents hydrogen storage. It can be seen that the hydrogen storage capacity increases steadily and stably triggers hydrogen transportation, and the ALE does not stop working.

[0221] Energy storage system SoC curve 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 charging and discharging during the charging and discharging process.

[0222] The total output power of the wind farm and the power consumed by the ALE are as follows: Figure 7 As shown, the horizontal axis is time and the vertical axis is the output active power of the wind system model. It can be seen that both the hydrogen production power and the total power have obvious fluctuations throughout the entire time period. This fluctuation may be related to the change of wind resources in the wind farm. Unstable wind power will cause changes in the output power of the wind farm, and the hydrogen production power is generally lower than the total power, indicating that the wind power system model may output part of the electrical energy 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 Fig. 9 , Fig. 9 A schematic flow chart of an offshore wind power hydrogen storage and transportation integrated energy system evaluation method 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 output power of the wind farm at time t is calculated; the 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 events are 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 determine 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 not, set t=t+1, repeat the execution to obtain the wind speed V[t] at time t, calculate the output power of the wind farm at time t and the following steps; if it is completed, use the hydrogen production, grid-connected power and 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; according to the output power of a single wind turbine, the desalination power consumption of the seawater desalination system model and the compression system power consumption of the hydrogen compression model, the dispatchable power is determined; if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is zero, the hydrogen production and online power 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 and online power 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; according to the total hydrogen production, online power sales power and cost data, 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.

[0227] See also Fig.10 , Fig.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 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 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 time 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 seawater desalination power consumption of the seawater 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 the grid-connected electricity 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 zero;

[0232] The second hydrogen production and electricity sales module 904 is used to determine 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 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 indexes 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 time period.

[0234] Optionally, the schedulable power calculation module 902 is specifically used for:

[0235] Calculate the number of wind turbines in the wind power system model and the multiplication value of 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 used to determine the allocable power for hydrogen production and the output power of the energy storage system at each moment in accordance with the comparison result between the energy storage charge state of the energy storage system model and the first preset value, combined with the dispatchable power;

[0240] The first power selling 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 online power selling 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 used for:

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

[0245] If the energy storage charge state 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 charge state 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 output power of the energy storage system 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 output power of the energy storage system at each moment according to 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 power consumption of hydrogen production 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 allocatable power calculation submodule specifically includes:

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

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

[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 is used 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 allocable 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 allocable power for hydrogen production.

[0260] Optionally, the first energy storage power calculation unit is specifically used for:

[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 used 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 used for:

[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 multiplication value between the total hydrogen production and the hydrogen selling price, calculate the difference between the total hydrogen production 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 electricity sales revenue;

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

[0272] Those skilled in the art can 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 only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, 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 separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[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 aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may 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, the system cost data and the wind speed data of the wind power system model at each moment in the evaluation time period are obtained, and the wind turbine power curve is interpolated to determine the output power of a single wind turbine; 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; 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; 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 optimization of the system configuration within the evaluation time period.

2. The method according to claim 1, characterized in that 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 comprises: Calculate 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; 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.

3. The method according to claim 1, characterized in that: The method of determining the hydrogen production amount and the grid-connected electricity sales power at each moment according to the dispatchable power and the energy storage charge state of the energy storage system model includes: According to the comparison result of the energy storage charge state of the energy storage system model and the first preset value, combined with the dispatchable power, the hydrogen production allocable power and the energy storage system output power at each moment are determined; Calculate 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 the 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.

4. The method according to claim 3, characterized in that The method of comparing the energy storage charge state of the energy storage system model with the first preset value and determining the hydrogen production allocable power and the energy storage system output power at each moment 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 charge state 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 charge state 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 output power of the energy storage system of the energy storage system model is determined as the dispatchable power; 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.

5. The method according to claim 1, characterized in that The method of determining 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: According to 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, determine the hydrogen production distributable power and the energy storage system output power at each moment; 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; 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; 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.

6. The method according to claim 5, 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 rated power of hydrogen production, 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 allocable power for hydrogen production; 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; 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.

7. The method according to claim 6, characterized in that The step of determining the output power of the energy storage system according to the energy storage charge state of the energy storage system model, in combination with the dispatchable power and the hydrogen production allocable power, comprises: 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.

8. The method according to claim 6, characterized in that The step of 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.

9. The method according to claim 1, characterized in that: Determining a plurality of system economic indicators according to 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, the ratio between the sum and the preset hydrogen production coefficient is calculated to obtain the total hydrogen production amount; After calculating the second multiplication value between 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 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.

10. An offshore wind power hydrogen storage and transportation integrated energy system evaluation device, characterized in that: A control terminal used for 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 device includes: A wind speed processing module is used to respond to the evaluation request, obtain system cost data and wind speed data of the wind power system model at each moment in the evaluation time period, and interpolate the wind turbine power curve to determine the output power of a single wind turbine; A dispatchable power calculation module, used 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; The first hydrogen production and electricity sales module is used to determine the hydrogen production amount and the grid-connected electricity 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 zero; The second hydrogen production and electricity sales module is used to determine 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 if the remaining hydrogen storage capacity of the hydrogen storage and transportation model is not zero; The system economic index determination module is used to determine multiple system economic indexes 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.

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