Port multi-energy fusion system, self-consistent operation method, equipment and medium thereof

Abstract

The present application relates to the technical field of multi-energy fusion, and particularly provides a port multi-energy fusion system, a self-consistent operation method thereof, equipment and a medium, aiming at solving the problem of low new energy utilization rate. In the system provided by the present application, the direct current area subsystem includes new energy power generation devices, direct current side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells and direct current loads which are connected to the direct current bus and placed nearby; the first alternating current area subsystem includes new energy power generation devices, alternating current side energy storage devices and a part of alternating current loads which are connected to the first section alternating current bus and placed nearby; the second alternating current area subsystem includes another part of alternating current loads which are connected to the second section alternating current bus; the direct current bus, the first section alternating current bus and the second section alternating current bus are interconnected through flexible multi-state switches to realize power balance. Through the power flow transfer of the flexible multi-state switches and the cooperation of the distributed energy storage, the power and energy of the power generation devices and the loads are self-consistent, and the new energy utilization rate is improved.

Description

Technical Field

[0001] This invention relates to the field of multi-energy integration technology, specifically to a port area multi-energy integration system and its self-consistent operation method, equipment and medium. Background Technology

[0002] With the rapid development of the port industry, the demand for electricity in port areas has also increased. Port area electricity is mainly used for bridge cranes, gantry cranes, yard lighting, and ship power. At the same time, the port area's geographical location on the coast provides ample sunshine and wind power, and it is rich in renewable resources.

[0003] To better utilize the port area's renewable resources, wind and solar power generation systems are often installed to supply electricity. However, the port area currently suffers from insufficient renewable energy absorption, resulting in a mismatch between the electricity generated and consumed, severely impacting the utilization rate of renewable energy.

[0004] Accordingly, a new technical solution is needed in this field to solve the above problems. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings, this invention is proposed to solve or at least partially solve the technical problem of the utilization rate of new energy sources.

[0006] In a first aspect, a port area multi-energy integrated system is provided, which includes a DC regional subsystem, a first AC regional subsystem, and a second AC regional subsystem.

[0007] The DC regional subsystem includes DC-type new energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area, all connected to the same DC bus and placed nearby. The DC-side energy storage devices are hybrid energy storage devices composed of energy-type energy storage devices and power-type energy storage devices.

[0008] The first AC area subsystem includes AC-type new energy power generation devices, AC-side energy storage devices, and a portion of AC-type loads within the port area, which are connected to the first AC busbar within the port area and placed nearby. The AC-side energy storage devices are power-type energy storage devices.

[0009] The second AC area subsystem includes another portion of AC loads connected to the second AC busbar within the port area;

[0010] The DC bus, the first AC bus section, and the second AC bus section are interconnected through a flexible multi-state switch to achieve power balance among the DC area subsystem, the first AC area subsystem, and the second AC area subsystem.

[0011] In one technical solution of the aforementioned port area multi-energy integration system, the DC-type new energy power generation device includes a first DC-type new energy power generation unit and a second DC-type new energy power generation unit.

[0012] The first DC-type new energy power generation unit is connected to the DC bus;

[0013] The second DC-type new energy power generation unit is connected to the second AC bus and is placed nearby with another part of the AC load;

[0014] Among them, the DC power generation of the first DC-type new energy power generation unit is less than the maximum DC load power of the DC-type load in the DC area subsystem.

[0015] In one technical solution of the aforementioned port area multi-energy integration system, the DC-side energy storage device in the DC area subsystem is removed or replaced by a hybrid energy storage device with an energy-type energy storage device.

[0016] In one technical solution of the aforementioned multi-energy integrated system for the port area,

[0017] DC-type new energy power generation devices include photovoltaic power generation devices;

[0018] AC-type new energy power generation devices include wind power discharge devices.

[0019] Secondly, a self-consistent operation method for the port area multi-energy integrated system described in the first aspect is provided, the self-consistent operation method comprising:

[0020] Configure the capacity and power of the DC-side energy storage device based on the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load;

[0021] Configure the capacity and power of the AC-side energy storage device based on the DC power generation, the AC power generation of the AC-type new energy power generation device, and the AC load power of the AC-type load.

[0022] Configure the charging and discharging strategy of the DC-side energy storage device based on the DC power generation and DC load power.

[0023] Configure the charging and discharging strategy of the AC-side energy storage device based on the AC power generation and AC load power.

[0024] The operating power of the water electrolysis hydrogen production unit is controlled based on the DC power generation, AC power generation, DC load power, and AC load power.

[0025] In one technical solution of the self-consistent operation method of the aforementioned port area multi-energy integration system, the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the energy-type energy storage device in the DC-side energy storage device through the following methods:

[0026] When the DC power generation is greater than the DC load power, the excess electricity generated by the DC-type new energy power generation device within a preset first time period is calculated. The excess electricity is the difference between the electricity generated by the DC-type new energy power generation device and the electricity consumed by the DC-type load.

[0027] The capacity of the energy storage device is determined based on the excess electricity generated and the energy storage utilization rate of the energy storage device.

[0028] Calculate the maximum power difference between DC power generation and DC load power within a preset second time period, and use the maximum power difference as the power configuration standard for energy storage devices;

[0029] The actual power of the energy storage device is determined according to the power configuration standard.

[0030] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "determining the actual power of the energy storage device according to the power configuration standard" specifically includes:

[0031] The power configuration standard is adjusted based on the power configuration cost of energy storage devices;

[0032] The actual power of the energy storage device is determined based on the adjusted power configuration standard.

[0033] In one technical solution of the self-consistent operation method of the aforementioned port area multi-energy integration system, the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the power-type energy storage device in the DC-side energy storage device through the following methods:

[0034] The difference between the power configuration standard of the energy-type energy storage device and the actual power of the energy-type energy storage device is obtained as the actual power of the power-type energy storage device;

[0035] The capacity of a power-type energy storage device is determined based on its actual power, the duration of a single discharge, and the voltage.

[0036] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "configuring the capacity and power of the AC-side energy storage device based on the DC power generation, the AC power generation of the AC-type new energy power generation device, and the AC load power of the AC-type load" specifically includes:

[0037] Step S1: Determine whether the AC power generation is less than the AC load power;

[0038] If so, add the DC power generation to the AC power generation and then subtract the AC load power. Based on the result, configure the actual power of the power-type energy storage device in the AC side energy storage device.

[0039] If not, then the actual power of the power-type energy storage device in the AC-side energy storage device is configured directly according to the DC power generation.

[0040] Step S2: Determine the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the voltage.

[0041] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "determining the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the voltage" specifically includes:

[0042] Based on the actual power of the power-type energy storage device, the duration of a single discharge, and the voltage, the capacity of the power-type energy storage device is calculated using the following formula:

[0043]

[0044] Where C represents the capacity of the power storage device, P represents the actual power of the power storage device, t represents the duration of a single discharge of the power storage device, U1 represents the voltage of the power storage device after charging, U2 represents the voltage of the power storage device before charging, and λ represents a preset constant coefficient.

[0045] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "configuring the charging and discharging strategy of the DC-side energy storage device according to the DC power generation and DC load power" specifically includes:

[0046] Within a preset third time period, the first time period in which the DC power generation is greater than the DC load power and the second time period in which the DC power generation is less than or equal to the DC load power are obtained;

[0047] During the first time period, the DC-side energy storage device is charged.

[0048] During the second time period, the DC-side energy storage device is controlled to discharge.

[0049] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "configuring the charging and discharging strategy of the AC-side energy storage device according to the AC power generation and AC load power" specifically includes:

[0050] The system obtains the relationship between AC power generation and AC load power within the current statistical period. If the AC power generation is greater than or equal to the AC load power within the current statistical period, the system controls the AC-side energy storage device to charge within the next statistical period. If the AC power generation is less than the AC load power within the current statistical period, the system controls the AC-side energy storage device to discharge within the next statistical period.

[0051] After the current statistical period ends, the relationship between AC power generation and AC load power is calculated for the next preset statistical period, and the charging and discharging strategy of the AC-side energy storage device is updated based on this relationship.

[0052] In one technical solution of the self-consistent operation method of the aforementioned multi-energy integrated system in the port area, the step of "controlling the operating power of the water electrolysis hydrogen production device based on the DC power generation, AC power generation, DC load power, and AC load power" specifically includes:

[0053] Determine whether the DC power generation is greater than the DC load power and / or whether the AC power generation is greater than the AC load power;

[0054] If the DC power generation is greater than the DC load power and / or the AC power generation is greater than the AC load power, then increase the operating power of the water electrolysis hydrogen production unit.

[0055] Otherwise, reduce the operating power of the water electrolysis hydrogen production unit.

[0056] In one technical solution of the self-consistent operation method for the aforementioned multi-energy integrated system in the port area, the self-consistent operation method further includes:

[0057] Determine whether the AC power generation capacity is greater than the AC load capacity;

[0058] If so, then start all or part of the high-power AC loads;

[0059] If not, then stop all or part of the high-power AC loads.

[0060] In a third aspect, a computer device is provided, comprising a processor and a storage device, the storage device being adapted to store a plurality of program codes, the program codes being adapted to be loaded and run by the processor to execute the self-consistent operation method of the port area multi-energy integration system described in any of the above-described technical solutions.

[0061] In a fourth aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored therein, the program codes being adapted to be loaded and run by a processor to perform the self-consistent operation method of the port area multi-energy integrated system described in any of the above-described technical solutions.

[0062] Solution 1. A port area multi-energy integrated system, characterized in that the port area multi-energy integrated system includes a DC regional subsystem, a first AC regional subsystem, and a second AC regional subsystem;

[0063] The DC regional subsystem includes DC-type new energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area, all connected to the same DC bus and placed nearby. The DC-side energy storage device is a hybrid energy storage device composed of energy-type energy storage devices and power-type energy storage devices.

[0064] The first AC area subsystem includes an AC-type new energy power generation device, an AC-side energy storage device, and a portion of AC-type loads within the port area, which are connected to the first AC busbar within the port area and placed nearby. The AC-side energy storage device is a power-type energy storage device.

[0065] The second AC area subsystem includes another portion of AC loads connected to the second AC busbar within the port area;

[0066] The DC bus, the first AC bus segment, and the second AC bus segment are interconnected via a flexible multi-state switch to achieve power balance among the DC subsystem, the first AC subsystem, and the second AC subsystem.

[0067] Option 2. The port area multi-energy integration system according to Option 1, characterized in that the DC-type new energy power generation device includes a first DC-type new energy power generation unit and a second DC-type new energy power generation unit;

[0068] The first DC-type new energy power generation unit is connected to the DC bus;

[0069] The second DC-type new energy power generation unit is connected to the second AC bus and is placed close to the other part of the AC load;

[0070] Wherein, the DC power generation of the first DC-type new energy power generation unit is less than the maximum DC load power of the DC-type load in the DC area subsystem.

[0071] Option 3. According to the port area multi-energy integration system described in Option 2, the DC-side energy storage device in the DC area subsystem is removed or replaced by a hybrid energy storage device with an energy-type energy storage device.

[0072] Option 4. The port area multi-energy integrated system according to Option 1, characterized in that,

[0073] The DC-type new energy power generation device includes a photovoltaic power generation device;

[0074] The AC-type new energy power generation device includes a wind power discharge device.

[0075] Option 5. A self-consistent operation method for a port area multi-energy integrated system, characterized in that the port area multi-energy integrated system is any one of Options 1 to 4, and the self-consistent operation method includes:

[0076] Configure the capacity and power of the DC-side energy storage device based on the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load;

[0077] Based on the DC power generation, the AC power generation of the AC-type new energy power generation device, and the AC load power of the AC-type load, configure the capacity and power of the AC-side energy storage device;

[0078] Configure the charging and discharging strategy of the DC-side energy storage device based on the DC power generation and DC load power.

[0079] Configure the charging and discharging strategy of the AC-side energy storage device based on the AC power generation and AC load power.

[0080] The operating power of the water electrolysis hydrogen production unit is controlled based on the DC power generation, AC power generation, DC load power, and AC load power.

[0081] Option 6. The self-consistent operation method of the port area multi-energy integration system according to Option 5, characterized in that the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the energy-type energy storage device in the DC-side energy storage device in the following ways:

[0082] When the DC power generation is greater than the DC load power, the excess electricity generated by the DC-type new energy power generation device within a preset first time period is calculated. The excess electricity is the difference between the electricity generated by the DC-type new energy power generation device and the electricity consumed by the DC-type load.

[0083] The capacity of the energy storage device is determined based on the over-generated electricity and the energy storage utilization rate of the energy storage device.

[0084] Calculate the maximum power difference between the DC power generation and the DC load power within a preset second time period, and use the maximum power difference as the power configuration standard for the energy storage device;

[0085] The actual power of the energy storage device is determined according to the power configuration standard.

[0086] Option 7. The self-consistent operation method of the port area multi-energy integrated system according to Option 6, characterized in that the step of "determining the actual power of the energy storage device according to the power configuration standard" specifically includes:

[0087] The power configuration standard is adjusted based on the power configuration cost of the energy storage device.

[0088] The actual power of the energy storage device is determined based on the adjusted power configuration standard.

[0089] Option 8. The self-consistent operation method of the port area multi-energy integration system according to Option 6, characterized in that the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the power-type energy storage device in the DC-side energy storage device in the following ways:

[0090] The difference between the power configuration standard of the energy storage device and the actual power of the energy storage device is obtained and used as the actual power of the power storage device.

[0091] The capacity of the power-type energy storage device is determined based on its actual power, the duration of a single discharge, and the voltage.

[0092] Scheme 9. The self-consistent operation method of the port area multi-energy integration system according to Scheme 5, characterized in that the step of "configuring the capacity and power of the AC-side energy storage device according to the DC power generation, the AC power generation of the AC-type new energy power generation device and the AC load power of the AC-type load" specifically includes:

[0093] Step S1: Determine whether the AC power generation is less than the AC load power;

[0094] If so, add the DC power generation to the AC power generation and then subtract the AC load power. Based on the result, configure the actual power of the power-type energy storage device in the AC side energy storage device.

[0095] If not, then the actual power of the power-type energy storage device in the AC-side energy storage device is configured directly according to the DC power generation.

[0096] Step S2: Determine the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the charging voltage.

[0097] Option 10. The self-consistent operation method of the port area multi-energy integrated system according to Option 8 or 9, characterized in that the step of "determining the capacity of the power-type energy storage device based on the actual power of the power-type energy storage device, the duration of a single discharge, and the charging voltage" specifically includes:

[0098] Based on the actual power of the power-type energy storage device, the duration of a single discharge, and the charging voltage, the capacity of the power-type energy storage device is calculated using the following formula:

[0099] Wherein, represents the capacity of the power-type energy storage device, represents the actual power of the power-type energy storage device, represents the duration of a single discharge of the power-type energy storage device, represents the voltage of the power-type energy storage device after charging, represents the voltage of the power-type energy storage device before charging, and represents a preset constant coefficient.

[0100] Option 11. The self-consistent operation method of the port area multi-energy integrated system according to Option 5, characterized in that the step of "configuring the charging and discharging strategy of the DC-side energy storage device according to the DC power generation and DC load power" specifically includes:

[0101] Within a preset third time period, the first time period in which the DC power generation is greater than the DC load power and the second time period in which the DC power generation is less than or equal to the DC load power are obtained;

[0102] During the first time period, the DC-side energy storage device is charged.

[0103] During the second time period, the DC-side energy storage device is controlled to discharge.

[0104] Option 12. The self-consistent operation method of the port area multi-energy integrated system according to Option 5, characterized in that the step of "configuring the charging and discharging strategy of the AC side energy storage device according to the AC power generation and AC load power" specifically includes:

[0105] The system obtains the relationship between AC power generation and AC load power within the current statistical period. If the AC power generation is greater than or equal to the AC load power within the current statistical period, the system controls the AC-side energy storage device to charge within the next statistical period. If the AC power generation is less than the AC load power within the current statistical period, the system controls the AC-side energy storage device to discharge within the next statistical period.

[0106] After the current statistical period ends, the relationship between AC power generation and AC load power is calculated for the next preset statistical period, and the charging and discharging strategy of the AC-side energy storage device is updated based on the relationship.

[0107] Option 13. The self-consistent operation method of the port area multi-energy integrated system according to Option 5, characterized in that the step of "controlling the operating power of the water electrolysis hydrogen production device according to the DC power generation, AC power generation, DC load power and AC load power" specifically includes:

[0108] Determine whether the DC power generation is greater than the DC load power and / or whether the AC power generation is greater than the AC load power;

[0109] If the DC power generation is greater than the DC load power and / or the AC power generation is greater than the AC load power, then increase the operating power of the water electrolysis hydrogen production unit.

[0110] Otherwise, reduce the operating power of the water electrolysis hydrogen production unit.

[0111] Option 14. The self-consistent operation method of the port area multi-energy integrated system according to Option 5, characterized in that the self-consistent operation method further includes:

[0112] Determine whether the AC power generation capacity is greater than the AC load capacity;

[0113] If so, then start all or part of the high-power AC loads;

[0114] If not, then stop all or part of the high-power AC loads.

[0115] Option 15. A computer device comprising a processor and a storage device, the storage device being adapted to store a plurality of program codes, characterized in that the program codes are adapted to be loaded and run by the processor to execute a self-consistent operation method of a port area multi-energy integrated system as described in any one of Options 5 to 14.

[0116] Scheme 16. A computer-readable storage medium storing a plurality of program codes, characterized in that the program codes are adapted to be loaded and run by a processor to perform a self-consistent operation method of a port area multi-energy integrated system as described in any one of Schemes 5 to 14.

[0117] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects:

[0118] By placing DC-type renewable energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area nearby, the DC-type loads and water electrolysis hydrogen production devices can consume the electricity generated by the DC-type renewable energy power generation devices as much as possible, achieving DC-side energy self-sufficiency. Similarly, placing AC-type renewable energy power generation devices, AC-side energy storage devices, and some AC-type loads within the port area nearby achieves AC-side energy self-sufficiency. This self-sufficiency between DC and AC sides improves energy utilization and avoids energy waste. The water electrolysis hydrogen production device installed in the port area's multi-energy integrated system can increase its operating power when the DC power generation is greater than the DC load power and / or the AC power generation is greater than the AC load power, and vice versa. This allows for adjusting the load power of the port area's multi-energy integrated system by regulating the operating power of the water electrolysis hydrogen production device, matching the load power of the port area's multi-energy integrated system with the renewable energy power generation, further improving energy utilization. When the demand for new energy power generation cannot be met by new energy power generation devices, the hydrogen produced by the water electrolysis hydrogen production device can be used to generate electricity through hydrogen fuel cells, giving full play to the advantages of hydrogen energy in large-capacity, long-term energy storage.

[0119] By adopting a self-consistent operation method for the aforementioned multi-energy integrated system in the port area, and configuring DC-side and AC-side energy storage devices, electrical energy is stored when the electricity generated by the new energy power generation devices cannot be consumed by the load, thus avoiding energy waste. Simultaneously, the charging and discharging strategies of the DC-side energy storage devices are configured according to the DC power generation and DC load power, ensuring that the DC-side energy storage devices can charge and discharge according to different conditions, guaranteeing the stability of DC load power consumption, and thus ensuring DC power safety. Similarly, the charging and discharging strategies of the AC-side energy storage devices are configured according to the AC power generation and AC load power, similarly ensuring the stability and safety of AC load power consumption. Finally, the operating power of the water electrolysis hydrogen production device is controlled according to the DC power generation, AC power generation, DC load power, and AC load power, smoothing out fluctuations in the port area's multi-energy integrated system and achieving self-consistent operation, making the port area more low-carbon and environmentally friendly. When the new energy power generation devices cannot meet the load demand, the hydrogen produced by the water electrolysis hydrogen production device can be consumed by hydrogen fuel cells to generate electricity, further ensuring the self-consistent operation of the port area's multi-energy integrated system. Attached Figure Description

[0120] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Wherein:

[0121] Figure 1 This is a schematic diagram of the main structure of a port area multi-energy integration system according to an embodiment of the present invention;

[0122] Figure 2 This is a schematic diagram of the main structure of a port area multi-energy integration system according to an embodiment of the present invention;

[0123] Figure 3 This is a schematic flowchart of the main steps of a self-consistent operation method for a multi-energy fusion system according to an embodiment of the present invention;

[0124] Figure 4 This is a schematic diagram of the main steps in configuring the capacity and power of the AC-side energy storage device in a multi-energy fusion system according to an embodiment of the present invention. Detailed Implementation

[0125] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0126] In the description of this invention, "processor" can include hardware, software, or a combination of both. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B.

[0127] The terminology involved in this invention will be explained below.

[0128] A flexible multi-state switch (FMSS) refers to a power electronic device built with power electronic components, providing functions such as power flow balance and voltage support. Depending on the type of power conversion structure used, flexible multi-state switches include, but are not limited to: flexible multi-state switches based on AC / DC / AC power conversion structures, flexible multi-state switches based on AC / AC power conversion structures, flexible multi-state switches based on AC / DC power conversion structures, and flexible multi-state switches based on DC / DC power conversion structures. A multi-port flexible multi-state switch refers to a flexible multi-state switch with multiple power input / output ports.

[0129] First, please refer to the appendix. Figure 1 , Figure 1This is a schematic diagram of the main structure of a port area multi-energy integrated system according to an embodiment of the present invention. Figure 1 As shown, the port area multi-energy integration system in this embodiment of the invention mainly includes a DC area subsystem, a first AC area subsystem, and a second AC area subsystem.

[0130] The DC regional subsystem includes DC-type new energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area, all connected to the same DC bus and placed nearby. The DC-side energy storage devices are hybrid energy storage devices composed of energy-type energy storage devices and power-type energy storage devices.

[0131] "Proximity placement" refers to the proximity of the devices. For example, placing a DC-type renewable energy power generation device and a DC-type load within the port area means that the DC-type load within the port area is located in the vicinity of the DC-type renewable energy power generation device. A DC-type renewable energy power generation device refers to a power generation device that generates direct current, such as a photovoltaic power generation device. A DC-side energy storage device refers to equipment such as batteries or supercapacitors that can store the electrical energy generated by the DC-type renewable energy power generation device. A water electrolysis hydrogen production device can be an alkaline water electrolysis hydrogen production device, a proton exchange membrane (PEM) hydrogen production device, or other commonly used water electrolysis hydrogen production devices. A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The DC-type renewable energy power generation device, DC-side energy storage device, water electrolysis hydrogen production device, and hydrogen fuel cell mentioned above are all commonly used devices in this field. This embodiment of the invention does not specifically limit the type of device used. A DC-type load within the port area refers to electrical appliances that operate using direct current, such as DC charging piles and emergency lighting.

[0132] The first AC area subsystem includes AC-type new energy power generation devices, AC-side energy storage devices, and a portion of AC-type loads within the port area, all connected to the first AC busbar within the port area and placed nearby. The AC-side energy storage devices are power-type energy storage devices.

[0133] The meaning of "placement nearby" is the same as that of the DC regional subsystem mentioned above, and will not be repeated here. AC-type renewable energy power generation devices refer to power generation devices that generate AC current, such as wind power generation devices and tidal power generation devices. AC-side energy storage devices refer to equipment such as supercapacitors that can store the electrical energy generated by AC-type renewable energy power generation devices. AC-type loads refer to electrical appliances such as bridge cranes and gantry cranes that operate using AC power.

[0134] The second AC area subsystem includes another portion of AC loads connected to the second AC busbar within the port area;

[0135] The DC bus, the first AC bus section, and the second AC bus section are interconnected through a flexible multi-state switch to achieve power balance among the DC area subsystem, the first AC area subsystem, and the second AC area subsystem.

[0136] In the DC regional subsystem, power balancing refers to the consumption of electrical energy generated by DC-type renewable energy power generation devices by DC-type loads and water electrolysis hydrogen production devices within the port area, and / or storage by DC-side energy storage devices. In the AC regional subsystem, power balancing refers to the storage of electrical energy generated by AC-type renewable energy power generation devices by AC-side energy storage devices and / or consumption by AC-type loads within the port area.

[0137] By placing DC-type renewable energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area nearby, the DC-type loads and water electrolysis hydrogen production devices can consume the electricity generated by the DC-type renewable energy power generation devices as much as possible, achieving DC-side energy self-sufficiency. Similarly, placing AC-type renewable energy power generation devices, AC-side energy storage devices, and some AC-type loads within the port area nearby achieves AC-side energy self-sufficiency. Through energy self-sufficiency on both the DC and AC sides, the utilization rate of electricity is improved, and energy waste is avoided.

[0138] See the appendix below. Figure 2 , Figure 2 This is a schematic diagram of the main structure of a port area multi-energy integrated system according to an embodiment of the present invention. Figure 2 As shown, the DC-type new energy power generation device in this embodiment of the invention includes a first DC-type new energy power generation unit and a second DC-type new energy power generation unit.

[0139] The first DC-type new energy power generation unit is connected to the DC bus.

[0140] A DC-type new energy power generation device consists of multiple new energy power generation units. Therefore, the DC-type new energy power generation device can be divided into multiple DC-type new energy power generation units, and different DC-type new energy power generation units can be connected to different busbars.

[0141] The second DC-type new energy power generation unit is connected to the second AC bus and is placed nearby with another part of the AC load. Among them, the DC power generation of the first DC-type new energy power generation unit is less than the maximum DC load power of the DC load in the DC area subsystem.

[0142] The DC power generation of the first DC-type new energy power generation unit is less than the maximum DC load power of the DC-type load in the DC area subsystem, which means that the electrical energy generated by the first DC-type new energy power generation unit can be completely consumed by the DC load in the DC area subsystem.

[0143] By splitting the DC-type renewable energy power generation device into multiple DC-type renewable energy power generation units, the DC-type renewable energy power generation unit can be smaller than the maximum DC load power. Therefore, the DC-type renewable energy power generation unit can be completely consumed by the load without the need to configure DC-side energy storage devices, which reduces the cost of configuring DC-side energy storage devices and improves the economic efficiency of the port area's multi-energy integration system.

[0144] In one embodiment of the present invention, the DC-side energy storage device in the DC area subsystem is removed or replaced by a hybrid energy storage device with an energy-type energy storage device.

[0145] In one embodiment of the present invention, the DC-type new energy power generation device includes a photovoltaic power generation device, and the AC-type new energy power generation device includes a wind power discharge device.

[0146] The following describes an embodiment of the self-consistent operation method of the multi-energy fusion system provided by the present invention.

[0147] See appendix Figure 3 , Figure 3 This is a schematic flowchart illustrating the main steps of a self-consistent operation method for a multi-energy fusion system according to an embodiment of the present invention. Figure 3 As shown, the self-consistent operation method of the multi-energy fusion system in this embodiment of the invention mainly includes the following steps S101 to S105.

[0148] Step S101: Configure the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load.

[0149] The purpose of configuring DC-side energy storage devices is to store the electricity generated by DC-type new energy power generation devices but not consumed by DC-type loads, so as to avoid the waste of electrical energy. Therefore, the capacity and power of DC-side energy storage devices need to be configured according to the DC power generation of DC-type new energy power generation devices and the DC load power of DC-type loads.

[0150] Step S102: Configure the capacity and power of the AC-side energy storage device according to the DC power generation, the AC power generation of the AC-type new energy power generation device and the AC load power of the AC-type load.

[0151] Since some DC-type new energy power generation units of the DC-type new energy power generation device can be connected to the AC bus through the AC-DC power conversion structure, the capacity and power of the AC-side energy storage device should be considered not only by the AC power generation of the AC-type new energy power generation device and the AC load power of the AC-type load, but also by the DC power generation.

[0152] Step S103: Configure the charging and discharging strategy of the DC-side energy storage device according to the DC power generation and DC load power.

[0153] The charging and discharging strategy of DC-side energy storage devices refers to the strategy for charging and discharging DC-side energy storage devices.

[0154] Step S104: Configure the charging and discharging strategy of the AC-side energy storage device according to the AC power generation and AC load power.

[0155] The charging and discharging strategy of AC-side energy storage devices refers to the strategy for charging and discharging AC-side energy storage devices.

[0156] Step S105: Control the operating power of the water electrolysis hydrogen production device based on the DC power generation, AC power generation, DC load power and AC load power.

[0157] The water electrolysis hydrogen production unit can operate safely within a range of 30% to 100% of its rated operating power. Therefore, the operating power of the water electrolysis hydrogen production unit can be controlled according to the actual conditions of the DC power generation, AC power generation, DC load power, and AC load power. When the DC power generation and AC power generation are low, and the DC load power and AC load power are high, the operating power of the water electrolysis hydrogen production unit can be reduced; conversely, the operating power of the water electrolysis hydrogen production unit can be increased.

[0158] Based on the methods described in steps S101 to S105 above, by configuring DC-side and AC-side energy storage devices, electrical energy generated by the new energy power generation device that cannot be consumed by the load is stored, thus avoiding energy waste. Simultaneously, configuring the charging and discharging strategy of the DC-side energy storage device according to the DC power generation and DC load power ensures that the DC-side energy storage device can charge and discharge according to different situations, guaranteeing the stability of DC load power consumption and thus ensuring DC-side power safety. Similarly, configuring the charging and discharging strategy of the AC-side energy storage device according to the AC power generation and AC load power also ensures the stability and safety of AC load power consumption. Finally, by controlling the operating power of the water electrolysis hydrogen production device based on the DC power generation, AC power generation, DC load power, and AC load power, fluctuations in the port area's multi-energy integrated system are mitigated.

[0159] The following provides further explanation of steps S101 and S104.

[0160] I. Explanation of step S101.

[0161] In one possible implementation of the first embodiment of the present invention, the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load (the aforementioned step S101)" specifically includes configuring the capacity and power of the energy-type energy storage device in the DC-side energy storage device through the following steps 11 to 14:

[0162] Step 11: When the DC power generation is greater than the DC load power, calculate the excess electricity generated by the DC-type new energy power generation device within the preset first time period. The excess electricity is the difference between the electricity generated by the DC-type new energy power generation device and the electricity consumed by the DC-type load.

[0163] When the DC power generation exceeds the DC load power, it means that the electricity generated by the DC-type new energy power generation device cannot be fully consumed by the DC load, and the excess electricity needs to be stored. The specific duration of the preset first time period can be set by those skilled in the art according to actual needs, and this embodiment of the invention does not limit it.

[0164] As an example, the first duration can be 24 hours. When the DC power generation is greater than the DC load power, the excess electricity generated by the DC-type new energy power generation device in 24 hours is 2600 kWh, that is, the electrical energy that needs to be stored in 24 hours is 2600 kWh.

[0165] Step 12: Determine the capacity of the energy storage device based on the excess electricity generated and the energy storage utilization rate of the energy storage device.

[0166] Energy storage devices need to convert electrical energy into chemical energy for storage during the energy storage process. Therefore, the energy storage utilization rate of energy storage devices cannot reach 100%. In order to store the excess electricity, energy storage devices with higher capacity need to be configured.

[0167] For example, if the excess electricity generation is 2600 kWh and the energy storage utilization rate is 80%, then the required capacity of the energy storage device is 2600 / 0.8 = 3.25 MWh.

[0168] Step 13: Calculate the maximum power difference between DC power generation and DC load power within the preset second time period, and use the maximum power difference as the power configuration standard for energy storage devices.

[0169] As the environment changes, the DC power generation capacity also changes, and similarly, the DC load power also changes with user usage. To ensure that the power of the energy storage device can meet the demand, the maximum power difference between the DC power generation capacity and the DC load power can be used as the power configuration standard for the energy storage device. The specific duration of the second preset time can be set by those skilled in the art according to actual needs, and this embodiment of the invention does not impose any limitations.

[0170] As an example, the second duration can be 24 hours, and the maximum power difference between DC power generation and DC load power is 1.16MW. Therefore, the power configuration standard for energy storage devices is 1.16MW.

[0171] Step 14: Determine the actual power of the energy storage device according to the power configuration standard.

[0172] After obtaining the power configuration standard, the power configuration standard can be directly used as the actual power of the energy storage device, or it can be adjusted according to actual needs based on the power configuration standard.

[0173] Using the methods described in steps 11 to 14 above, the excess electricity generated by the DC-type new energy power generation device is first obtained. Then, based on the excess electricity and the energy storage utilization rate of the energy storage device, the capacity of the energy storage device is determined, ensuring that the capacity of the energy storage device can store the excess electricity and preventing its waste. When determining the actual power of the energy storage device, the maximum power difference between the DC power generation and the DC load power within a preset second time period is selected as the standard, ensuring that the energy storage device can meet the demand.

[0174] The power configuration cost of an energy storage device is directly proportional to its actual power; the greater the actual power of the energy storage device, the higher its power configuration cost.

[0175] In one embodiment of the first embodiment of the present invention, the step of "determining the actual power of the energy storage device according to the power configuration standard (step 14 above)" specifically includes the following steps 21 to 22:

[0176] Step 21: Adjust the power configuration standard according to the power configuration cost of the energy storage device.

[0177] To reduce the power configuration cost of energy storage devices, the actual power of the energy storage device can be appropriately reduced. For example, if the standard power configuration for an energy storage device is 1.16MW, the standard can be adjusted to 1MW to reduce the power configuration cost. It should be noted that those skilled in the art can increase the power configuration standard to ensure the stability of the energy storage device; such increases in power configuration standard also fall within the protection scope of this invention.

[0178] Step 22: Determine the actual power of the energy storage device based on the adjusted power configuration standard.

[0179] After obtaining the adjusted power configuration standard, the adjusted power configuration standard can be used as the actual power of the energy storage device.

[0180] By using the methods in steps 21 to 22 above, the power configuration standard is adjusted according to the power configuration cost, thereby reducing the actual power of the energy storage device and thus reducing the cost of the energy storage device.

[0181] In one embodiment of the first embodiment of the present invention, the step of "configuring the capacity and power of the DC-side energy storage device according to the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load (the aforementioned step S101)" specifically includes configuring the capacity and power of the power-type energy storage device in the DC-side energy storage device through the following steps 31 to 32:

[0182] Step 31: Obtain the difference between the power configuration standard of the energy storage device and the actual power of the energy storage device, and use it as the actual power of the power storage device.

[0183] Due to factors such as safety and configuration costs, the actual power output of an energy storage device may differ from its power configuration standard. This difference represents the power deficiency in the energy storage device. To compensate for this power deficiency, the actual power output of a power-type energy storage device can be set to the difference between the power configuration standard and the actual power output of the energy storage device.

[0184] For example, if the power configuration standard of an energy storage device is 1.16MW and the actual power of the energy storage device is 1MW, the difference between the power configuration standard and the actual power of the energy storage device is 0.16MW. Therefore, the actual power of the power storage device is 0.16MW.

[0185] Step 32: Determine the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the voltage.

[0186] The duration of a single discharge refers to the time it takes for the capacitor to begin discharging and reach the minimum voltage required to support the load. Voltage refers to the difference between the minimum voltage required to support the load and the maximum voltage of the capacitor. Combining these parameters, the capacity of a power storage device can be determined.

[0187] By configuring the capacity and power of the power-type energy storage device in the DC-side energy storage device using the methods in steps 31 to 32 above, the power-type energy storage device can fill the power gap of the energy-type energy storage device. Under the premise of ensuring that the energy storage device meets the demand, the hardware cost of the power-type energy storage device is reduced, and the economic efficiency of the port area's multi-energy integration system is improved.

[0188] II. Further explanation of step S102.

[0189] In one embodiment of the first embodiment of the present invention, such as Figure 4 As shown, the step of "configuring the capacity and power of the AC-side energy storage device according to the DC power generation, the AC power generation of the AC-type new energy power generation device, and the AC load power of the AC-type load (as described in step S102)" specifically includes the following steps S201 to S204:

[0190] Step S201: Determine whether the AC power generation is less than the AC load power. If yes, proceed to step S202; otherwise, proceed to step S203.

[0191] Step S202: Add the DC power generation power to the AC power generation power, then subtract the AC load power, and configure the actual power of the power-type energy storage device in the AC side energy storage device according to the result.

[0192] When the AC power generation is less than the AC load power, the DC power generation needs to be supplied to the AC load power. Therefore, the DC power generation needs to be added to the AC power generation and then the AC load power needs to be subtracted to obtain the power required for the AC side energy storage device.

[0193] Step S203: Directly configure the actual power of the power-type energy storage device in the AC-side energy storage device according to the DC power generation.

[0194] When the AC power generation is greater than or equal to the AC load power, there is no need to supply the DC power generation to the AC load power. Therefore, the actual power of the power-type energy storage device in the AC side energy storage device can be configured according to the DC power generation.

[0195] Step S204: Determine the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the voltage.

[0196] The method and steps for determining the capacity of the power-type energy storage device here are the same as those for determining the capacity of the power-type energy storage device in step 32 above, and will not be repeated here.

[0197] By using the methods described in steps S201 to S204 above, the capacity and power of the AC-side energy storage device can be configured. The capacity and power of the AC-side energy storage device can be configured according to the relationship between the AC power generation and the AC load power, ensuring that the AC-side energy storage device can meet the energy storage needs under different conditions.

[0198] In one embodiment of the first embodiment of the present invention, the step of "determining the capacity of the power-type energy storage device based on the actual power of the power-type energy storage device, the duration of a single discharge, and the voltage (the aforementioned step S204)" specifically includes:

[0199] Based on the actual power of the power-type energy storage device, the duration of a single discharge, and the voltage, the capacity of the power-type energy storage device is calculated using the following formula:

[0200]

[0201] Where C represents the capacity of the power storage device, P represents the actual power of the power storage device, t represents the duration of a single discharge of the power storage device, U1 represents the voltage of the power storage device after charging, U2 represents the voltage of the power storage device before charging, and λ represents a preset constant coefficient.

[0202] The preset constant coefficient can be set by those skilled in the art according to actual needs. The embodiments of the present invention do not limit the specific value of the preset constant coefficient. The actual power of the power energy storage device can be obtained by the method described in step 31 above. The voltage of the power energy storage device before and after charging and the duration of a single discharge of the power energy storage device can be obtained by actual measurement.

[0203] III. Further explanation of step S103.

[0204] In one embodiment of the first embodiment of the present invention, the step of “configuring the charging and discharging strategy of the DC-side energy storage device according to the DC power generation and DC load power (the aforementioned step S103)” specifically includes the following steps 41 to 42:

[0205] Step 41: Obtain the first time period in which the DC power generation is greater than the DC load power and the second time period in which the DC power generation is less than or equal to the DC load power within a preset third time period.

[0206] The preset third duration can be set by those skilled in the art according to actual needs. The embodiments of the present invention do not limit the specific value of the preset third duration.

[0207] Step 42: During the first time period, control the DC-side energy storage device to charge.

[0208] Step 43: During the second time period, control the DC side energy storage device to discharge.

[0209] By configuring the charging and discharging strategy of the DC-side energy storage device using the methods in steps 41 to 43 above, the excess electricity generated when the DC power generation is greater than the DC load power can be stored by the energy storage device and released when the DC power generation is less than or equal to the DC load power, thus avoiding the waste of excess electricity and further ensuring the stability of DC load power consumption.

[0210] IV. Further explanation of step S104.

[0211] In one embodiment of the first embodiment of the present invention, the step of “configuring the charging and discharging strategy of the AC-side energy storage device according to the AC power generation and AC load power (the aforementioned step S104)” specifically includes the following steps 51 to 52:

[0212] Step 51: Obtain the relationship between AC power generation and AC load power within the current statistical period. If the AC power generation is greater than or equal to the AC load power within the current statistical period, then control the AC-side energy storage device to charge within the next statistical period. If the AC power generation is less than the AC load power within the current statistical period, then control the AC-side energy storage device to discharge within the next statistical period.

[0213] The duration of the statistical analysis can be set by those skilled in the art according to actual needs. The embodiments of this invention do not limit the specific value of the statistical duration. It should be noted that the statistical duration is typically chosen to be a relatively small value, such as 15 seconds.

[0214] Step 52: After the current statistical period ends, calculate the relationship between AC power generation and AC load power in the next preset statistical period, and update the charging and discharging strategy of the AC side energy storage device according to the relationship.

[0215] As an example, if the AC power generation was greater than or equal to the AC load power in the previous statistical period, then the AC-side energy storage device will be charged in the current statistical period. If the AC power generation is greater than or equal to the AC load power in the current statistical period, then the AC-side energy storage device will be charged in the next statistical period.

[0216] By configuring the charging and discharging strategy of the AC-side energy storage device using the methods described in steps 51 to 52 above, the charging and discharging strategy of the AC-side energy storage device in the next statistical period can be predicted quickly and accurately based on the relationship between the AC power generation and AC load power in the current statistical period, thus ensuring the real-time performance and accuracy of the charging and discharging strategy of the AC-side energy storage device.

[0217] V. Further explanation of step S105.

[0218] The water electrolysis hydrogen production unit can operate safely within a range of 30% to 100% of its rated operating power. Therefore, the load of the port area's multi-energy integrated system can be adjusted by regulating the operating power of the water electrolysis hydrogen production unit.

[0219] In one embodiment of the first embodiment of the present invention, the step of "controlling the operating power of the water electrolysis hydrogen production device according to the DC power generation power, AC power generation power, DC load power and AC load power (the aforementioned step S105)" specifically includes the following steps 61 to 63:

[0220] Step 61: Determine whether the DC power generation is greater than the DC load power and / or whether the AC power generation is greater than the AC load power.

[0221] Step 62: If the DC power generation is greater than the DC load power and / or the AC power generation is greater than the AC load power, then increase the operating power of the water electrolysis hydrogen production unit.

[0222] When the DC power generation exceeds the DC load power and / or the AC power generation exceeds the AC load power, it means that the generated electricity cannot be fully consumed by the load. Therefore, the operating power of the water electrolysis hydrogen production unit can be increased. Increasing the operating power of the water electrolysis hydrogen production unit can be achieved by increasing its voltage.

[0223] Step 63: Otherwise, reduce the operating power of the water electrolysis hydrogen production unit.

[0224] When the DC power generation is less than or equal to the DC load power and / or the AC power generation is less than or equal to the AC load power, it means that the generated electricity cannot meet the load. Therefore, the operating power of the water electrolysis hydrogen production unit can be reduced. Reducing the operating power of the water electrolysis hydrogen production unit can be achieved by lowering its voltage.

[0225] It should be noted that, regardless of whether the operating power of the water electrolysis hydrogen production unit is increased or decreased, it must be ensured that the operating power of the water electrolysis hydrogen production unit is within the safe operating range.

[0226] By using the methods in steps 61 to 63 above, when the power generation of the port area's multi-energy integrated system is greater than the load power, the operating power of the water electrolysis hydrogen production device is increased; conversely, the operating power of the water electrolysis hydrogen production device is reduced. This achieves dynamic adjustment of the operating power of the water electrolysis hydrogen production device and reduces fluctuations in the port area's multi-energy integrated system.

[0227] Since high-power electrical equipment is usually an AC load, the power of the AC load can be controlled by controlling the high-power AC load.

[0228] In one embodiment of the second embodiment of the present invention, the self-consistent operation method further includes the following steps 71 to 73:

[0229] Step 71: Determine whether the AC power generation is greater than the AC load power.

[0230] Step 72: If so, start all or part of the high-power AC loads.

[0231] High-power AC loads refer to equipment such as ship unloaders and gantry cranes.

[0232] Step 73: If not, stop all or part of the high-power AC loads.

[0233] By controlling the high-power AC loads in steps 71 to 73 above, all or part of the high-power AC loads are started when the AC power generation is greater than the AC load power, and all or part of the high-power AC loads are stopped when the AC power generation is less than or equal to the AC load power. This reduces the fluctuation of AC load power and ensures the stability of the port area's multi-energy integration system.

[0234] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0235] Those skilled in the art will understand that all or part of the processes in the method of the above embodiment of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0236] Furthermore, the present invention also provides a computer device.

[0237] In one embodiment of a computer device according to the present invention, the computer device includes a processor and a storage device. The storage device may be configured to store a program for executing the self-consistent operation method of the port area multi-energy integrated system described in the above-described method embodiments. The processor may be configured to execute the program stored in the storage device. This program includes, but is not limited to, a program for executing the self-consistent operation method of the port area multi-energy integrated system described in the above-described method embodiments. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer device may be a control device comprising various electronic devices.

[0238] Furthermore, the present invention also provides a computer-readable storage medium.

[0239] In one embodiment of the computer-readable storage medium according to the present invention, the computer-readable storage medium may be configured to store a program for executing the self-consistent operation method of the port area multi-energy fusion system described in the above-described method embodiments. This program may be loaded and run by a processor to implement the self-consistent operation method of the port area multi-energy fusion system. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer-readable storage medium may be a storage device comprising various electronic devices. Optionally, in the embodiments of the present invention, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0240] The technical solution of the present invention has been described above with reference to one embodiment shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions resulting from such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A multi-energy integrated system for port areas, characterized in that, The port area multi-energy integrated system includes a DC regional subsystem, a first AC regional subsystem, and a second AC regional subsystem. The DC regional subsystem includes DC-type new energy power generation devices, DC-side energy storage devices, water electrolysis hydrogen production devices, hydrogen fuel cells, and DC-type loads within the port area, all connected to the same DC bus and placed nearby. The DC-side energy storage device is a hybrid energy storage device composed of energy-type energy storage devices and power-type energy storage devices. The first AC area subsystem includes an AC-type new energy power generation device, an AC-side energy storage device, and a portion of AC-type loads within the port area, which are connected to the first AC busbar within the port area and placed nearby. The AC-side energy storage device is a power-type energy storage device. The second AC area subsystem includes another portion of AC loads connected to the second AC busbar within the port area; The DC bus, the first AC bus section, and the second AC bus section are interconnected by a flexible multi-state switch to achieve power balance of the DC area subsystem, the first AC area subsystem, and the second AC area subsystem. The capacity and power of the AC-side energy storage device are configured in the following manner: Step S1: Determine whether the AC power generation of the AC-type new energy power generation device is less than the AC load power of the AC-type load; If so, the DC power generation of the DC-type new energy power generation device is added to the AC power generation, and then the AC load power is subtracted. Based on the result, the actual power of the power-type energy storage device in the AC-side energy storage device is configured. If not, then the actual power of the power-type energy storage device in the AC-side energy storage device is configured directly according to the DC power generation. Step S2: Determine the capacity of the power-type energy storage device based on its actual power, the duration of a single discharge, and the charging voltage.

2. The port area multi-energy integrated system according to claim 1, characterized in that, The DC-type new energy power generation device includes a first DC-type new energy power generation unit and a second DC-type new energy power generation unit; The first DC-type new energy power generation unit is connected to the DC bus; The second DC-type new energy power generation unit is connected to the second AC bus and is placed close to the other part of the AC load; Wherein, the DC power generation of the first DC-type new energy power generation unit is less than the maximum DC load power of the DC-type load in the DC area subsystem.

3. The port area multi-energy integrated system according to claim 2, characterized in that, The DC-side energy storage device in the DC area subsystem is removed or replaced by a hybrid energy storage device with an energy-type energy storage device.

4. The port area multi-energy integrated system according to claim 1, characterized in that, The DC-type new energy power generation device includes a photovoltaic power generation device; The AC-type new energy power generation device includes a wind power discharge device.

5. A self-consistent operation method for a multi-energy integrated system in a port area, characterized in that, The port area multi-energy integrated system is the port area multi-energy integrated system as described in any one of claims 1 to 4, and the self-consistent operation method includes: Configure the capacity and power of the DC-side energy storage device based on the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load; Configure the charging and discharging strategy of the DC-side energy storage device based on the DC power generation and DC load power. Configure the charging and discharging strategy of the AC-side energy storage device based on the AC power generation and AC load power. The operating power of the water electrolysis hydrogen production unit is controlled based on the DC power generation, AC power generation, DC load power, and AC load power.

6. The self-consistent operation method of the port area multi-energy integrated system according to claim 5, characterized in that, The step of "configuring the capacity and power of the DC-side energy storage device based on the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the energy storage device in the DC-side energy storage device through the following methods: When the DC power generation is greater than the DC load power, the excess electricity generated by the DC-type new energy power generation device within a preset first time period is calculated. The excess electricity is the difference between the electricity generated by the DC-type new energy power generation device and the electricity consumed by the DC-type load. The capacity of the energy storage device is determined based on the over-generated electricity and the energy storage utilization rate of the energy storage device. Calculate the maximum power difference between the DC power generation and the DC load power within a preset second time period, and use the maximum power difference as the power configuration standard for the energy storage device; The actual power of the energy storage device is determined according to the power configuration standard.

7. The self-consistent operation method of the port area multi-energy integrated system according to claim 6, characterized in that, The step of "determining the actual power of the energy storage device according to the power configuration standard" specifically includes: The power configuration standard is adjusted based on the power configuration cost of the energy storage device. The actual power of the energy storage device is determined based on the adjusted power configuration standard.

8. The self-consistent operation method of the port area multi-energy integrated system according to claim 6, characterized in that, The step of "configuring the capacity and power of the DC-side energy storage device based on the DC power generation of the DC-type new energy power generation device and the DC load power of the DC-type load" specifically includes configuring the capacity and power of the power-type energy storage device in the DC-side energy storage device through the following methods: The difference between the power configuration standard of the energy storage device and the actual power of the energy storage device is obtained and used as the actual power of the power storage device. The capacity of the power-type energy storage device is determined based on its actual power, the duration of a single discharge, and the voltage.

9. The self-consistent operation method of the port area multi-energy integrated system according to claim 8, characterized in that, The self-consistent operation method also includes: Based on the actual power of the power-type energy storage device, the duration of a single discharge, and the charging voltage, the capacity of the power-type energy storage device is calculated using the following formula: in, This indicates the capacity of the power-type energy storage device. This indicates the actual power of the power-type energy storage device. This indicates the duration of a single discharge of the power-type energy storage device. This indicates the voltage of the power-type energy storage device after charging. This indicates the voltage of the power-type energy storage device before charging. This represents the preset constant coefficient.

10. The self-consistent operation method of the port area multi-energy integrated system according to claim 5, characterized in that, The steps of "configuring the charging and discharging strategy of the DC-side energy storage device based on the DC power generation and DC load power" specifically include: Within a preset third time period, the first time period in which the DC power generation is greater than the DC load power and the second time period in which the DC power generation is less than or equal to the DC load power are obtained; During the first time period, the DC-side energy storage device is charged. During the second time period, the DC-side energy storage device is controlled to discharge.

11. The self-consistent operation method of the port area multi-energy integrated system according to claim 5, characterized in that, The steps of "configuring the charging and discharging strategy of the AC-side energy storage device based on the AC power generation and AC load power" specifically include: The system obtains the relationship between AC power generation and AC load power within the current statistical period. If the AC power generation is greater than or equal to the AC load power within the current statistical period, the system controls the AC-side energy storage device to charge within the next statistical period. If the AC power generation is less than the AC load power within the current statistical period, the system controls the AC-side energy storage device to discharge within the next statistical period. After the current statistical period ends, the relationship between AC power generation and AC load power is calculated for the next preset statistical period, and the charging and discharging strategy of the AC-side energy storage device is updated based on the relationship.

12. The self-consistent operation method of the port area multi-energy integrated system according to claim 5, characterized in that, The steps for "controlling the operating power of the water electrolysis hydrogen production unit based on DC power generation, AC power generation, DC load power, and AC load power" specifically include: Determine whether the DC power generation is greater than the DC load power and / or whether the AC power generation is greater than the AC load power; If the DC power generation is greater than the DC load power and / or the AC power generation is greater than the AC load power, then increase the operating power of the water electrolysis hydrogen production unit. Otherwise, reduce the operating power of the water electrolysis hydrogen production unit.

13. The self-consistent operation method of the port area multi-energy integrated system according to claim 5, characterized in that, The self-consistent operation method also includes: Determine whether the AC power generation capacity is greater than the AC load capacity; If so, then start all or part of the high-power AC loads; If not, then stop all or part of the high-power AC loads.

14. A computer device comprising a processor and a storage device, said storage device being adapted to store a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to perform the self-consistent operation method of the port area multi-energy integration system according to any one of claims 5 to 13.

15. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the self-consistent operation method of the port area multi-energy integration system as described in any one of claims 5 to 13.

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