Bridge-land networking power supply system and method suitable for long-distance cross-sea bridge

Abstract

The invention relates to a bridge-land networking power supply system and method suitable for a long-distance cross-sea bridge, and the system comprises an offshore power module which converts renewable energy into electric energy based on various offshore power generation stations; the bridge power supply module is used for converting renewable energy into electric energy based on various bridge floor up-and-down power generation stations; the bridge energy storage module is used for storing and releasing the electric energy generated by the power supply module based on various bridge floor up-down energy storage power stations; the bridge power supply module meets the requirements of various electric facilities based on up-down power supply equipment on the bridge floor; the bridge-land networking module is used for laying a power transmission line based on a bridge frame, connecting the offshore power supply module, the bridge power supply module, the bridge energy storage module, the bridge power supply module and the intelligent control module into a whole, and interconnecting with land power grids on two sides of the bridge; and the intelligent control module carries out calculation by taking the first meeting of the power supply of the bridge as a target, and judges the power transmission direction and scale between the bridge-land networking module and land power grids on the two sides of the bridge.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of source network and load storage, in particular to a bridge-land networking power supply system and method suitable for long-distance sea-crossing bridges. BACKGROUND

[0002] With the development of society and economy in coastal areas, long-distance sea-crossing bridges are key hubs connecting the two sides of the continent, continent and peninsula, continent and island, and island and island. However, the energy supply of the bridge itself and the surrounding area faces many challenges. The traditional solution is to lay cables along the bridge from the mainland side for a long distance to power the bridge's lighting, monitoring, maintenance, service area and other facilities. Due to the long distance of the sea-crossing bridge, which usually spans tens of kilometers, the construction and maintenance cost of the power system is high, and the voltage drop, line failure rate, power loss and carbon emission scale are large. Moreover, the bridge relies entirely on external power grids for power supply, and in the event of natural disasters or accidents, the bridge cannot provide power communication, transportation, medical rescue, news publicity, disaster relief and other important functions, nor can it provide emergency power support for the land power grid on both sides of the bridge.

[0003] At the same time, the marine environment where the sea-crossing bridge is located has abundant renewable energy sources such as wind energy, solar energy, and wave energy. However, these resources along the bridge have not been effectively utilized. The existing development plan mainly utilizes a single energy form, such as laying photovoltaic panels on the bridge deck, without forming a comprehensive energy supply system that is complementary to other types of power sources, self-sufficient, and surplus power grid. In addition, the space of the bridge piers, service areas and other infrastructure is not fully utilized, and the potential energy and industrial value needs to be further explored.

[0004] Therefore, there is an urgent need for a power supply system and method that can convert the resources of long-distance sea-crossing bridges and their surrounding environment into a self-sufficient and externally collaborative power supply system, with the characteristics of three-dimensional, integrated and intelligent. SUMMARY

[0005] In order to solve the problems existing in the prior art, the present application provides a bridge-land networking power supply system and method suitable for long-distance sea-crossing bridges.

[0006] The technical scheme of the present application is as follows: On the one hand, the present application provides a bridge-land networking power supply system suitable for long-distance sea-crossing bridges, comprising: a marine power module for converting renewable energy into electricity based on various marine power stations; the various marine power stations are specifically marine wind turbine generators and marine photovoltaic arrays constructed along the bridge. The bridge power module is based on various types of bridge power stations on the bridge deck to convert renewable energy into electrical energy. The bridge energy storage module is based on various types of bridge energy storage stations on the bridge deck to store and release the electrical energy generated by the power module. The bridge power supply module is based on power supply equipment on the bridge deck to meet the needs of various power facilities; the power supply equipment includes direct current power supply equipment and alternating current power supply equipment. The bridge-land networking module is based on the bridge cable laying power transmission line to connect the offshore power module, the bridge power module, the bridge energy storage module, the bridge power supply module, and the intelligent control module into a whole, and interconnect with the land power grid on both sides of the bridge. The intelligent control module is based on the power generation capacity of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the demand of the bridge power supply module to calculate and determine the direction and scale of power transmission between the bridge-land networking module and the land power grid on both sides of the bridge.

[0007] As a preferred embodiment, the bridge deck power station is specifically a distributed photovoltaic power generation array using traffic safety facilities and auxiliary structures on the bridge deck, and the bridge deck power station is specifically a wave power generation device installed on the underwater part of the bridge pier.

[0008] As a preferred embodiment, the bridge deck traffic safety facilities and auxiliary structures include central dividers, guardrails, anti-glare boards, and safety free space above part of the road surface.

[0009] As a preferred embodiment, the various types of bridge deck and bridge deck energy storage stations include various types of bridge deck electrochemical energy storage devices and bridge deck compressed air energy storage devices.

[0010] As a preferred embodiment, the installation method of the power supply equipment includes fixed, mobile and hybrid, and realizes universalization and standardization with the device interface of various power facilities on the bridge deck and below the bridge deck.

[0011] As a preferred embodiment, the various power facilities include bridge power consumption, traffic facility charging and battery replacement equipment, and marine industry power consumption equipment.

[0012] As a preferred embodiment, the step of calculating and determining the direction and scale of power transmission between the bridge-land networking module and the land power grid on both sides of the bridge with the target of first meeting the power supply of the bridge is specifically: When the total power generation of the offshore power supply + the bridge power supply is greater than the sum of the bridge power supply demand + the bridge energy storage capacity, the bridge-land networking module sends the surplus power to the land power grid on both sides of the bridge, and the specific determination formula is as follows:

[0013] In the formula, is the power generation of the offshore power module, is the serial number of the offshore power module, is the total number of the offshore power module; is the power generation of the bridge power module, is the serial number of the bridge power module, is the total number of the bridge power module; is the demand of the bridge power supply module, is the serial number of the bridge power supply module, is the number of the bridge power supply module; is the total capacity of the bridge energy storage module, is the serial number of the bridge energy storage module, is the number of the bridge energy storage module; When the sum of the offshore power generation + the bridge power generation + the bridge energy storage capacity is less than the bridge power supply demand, the bridge land networking module is supplemented with power supply by the land power grid on both sides of the bridge, and the specific judgment formula is as follows:

[0014] When the total power generation of the offshore power + the bridge power is greater than or equal to the bridge power supply demand, and less than or equal to the sum of the bridge power supply demand + the bridge energy storage capacity, the bridge land networking module does not need to supply power to each other with the land power grid on both sides of the bridge, and is in a self-balancing state, and the specific judgment formula is as follows:

[0015] On the other hand, the application proposes a bridge land networking power supply method suitable for long-distance sea-crossing bridges, which comprises: Based on various types of offshore power stations for converting renewable energy into electric energy; the various types of offshore power stations are specifically offshore wind turbine generators and offshore photovoltaic power arrays constructed by utilizing the sea area along the bridge; Based on various types of bridge surface and bridge bottom power stations for converting renewable energy into electric energy; Based on various types of bridge surface and bridge bottom energy storage stations for storing and releasing the electric energy generated by the power modules; Based on the bridge surface and bridge bottom power supply equipment to meet the demand of various power facilities; the power supply equipment includes direct current power supply equipment and alternating current power supply equipment; Based on the bridge bridge laying power transmission lines, connecting the offshore power module, the bridge power module, the bridge energy storage module, the bridge power supply module and the intelligent control module into a whole, and interconnecting with the land power grid on both sides of the bridge; Based on the power generation capacity of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the demand of the bridge power supply module, the calculation is carried out with the goal of meeting the bridge power supply first, to judge the power transmission direction and scale between the bridge land networking module and the land power grid on both sides of the bridge.

[0016] In another aspect, the present application provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method for bridge-land networking power supply for long-distance sea-crossing bridge according to any one of the embodiments of the present application when executing the program.

[0017] In another aspect, the present application provides a computer readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method for bridge-land networking power supply for long-distance sea-crossing bridge according to any one of the embodiments of the present application.

[0018] The present application has the following beneficial effects: 1. The bridge-land networking power supply system for long-distance sea-crossing bridge according to the present application realizes full utilization of resources on the sea, on the bridge surface, under the bridge surface, and underwater along the bridge, maximizes the space utilization rate, improves the energy output density per unit area, and reduces the comprehensive investment level; and realizes the complementarity of different types of energy in time, improves the all-weather output smoothness and stability.

[0019] 2. The bridge-land networking power supply system for long-distance sea-crossing bridge according to the present application can meet the power supply demand of various power-consuming facilities such as lighting, monitoring, maintenance, bridge traffic facility charging and power exchange, and marine industry under the bridge by the power generated by the offshore power supply and the bridge power supply near the bridge, avoids the decline of power quality and the increase of line fault rate caused by long-distance power transmission, reduces the long-distance cable investment and power loss, improves the utilization efficiency of offshore and bridge power generation resources, improves the convenience of charging and the endurance of traffic facilities on the bridge, and improves the scale of clean energy development and the environmental protection and carbon reduction benefits.

[0020] 3. The bridge-land networking power supply system for long-distance sea-crossing bridge according to the present application considers the power provided by the offshore power supply and the bridge power supply, the charging and discharging capacity of the bridge energy storage, and the power demand of the bridge load, formulates an optimal power distribution scheme, and can meet the power supply demand of various power-consuming facilities on and under the bridge under normal circumstances.

[0021] 4. The bridge-land networking power supply system for long-distance sea-crossing bridge according to the present application fully integrates the power generation capacity of the offshore power supply and the bridge power supply, the regulation capacity of the bridge energy storage, the power supply capacity of the bridge power supply module, and the flexible operation mode of the bridge-land networking system, can meet the power supply demand of important functions such as communication, transportation, medical rescue, news propaganda, and disaster relief under the condition that the bridge faces a sudden event such as natural disaster or accident disaster and loses contact with the land on both sides; can also provide necessary emergency power support for the land power grid on both sides of the bridge; and helps the emergency management agencies to achieve the goal of "scientific emergency and intelligent emergency" under the condition of small probability, high risk, and super-conventional extreme situation.

[0022] 5. The bridge-land interconnection power supply system for long-distance cross-sea bridges in this invention can also serve as a backup interconnection channel for the onshore power grids on both sides of the bridge, enabling unified scheduling and operation of the power grid over a wider area; it can also add communication modules with the onshore power grids on both sides of the bridge or other bridge-land interconnection systems, enabling optimized configuration and utilization of the power generated by the offshore power source and the bridge power source over a wider area, and expanding the source-grid-load-storage benefits. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the connections between the modules of the system of the present invention; Figure 2 This is a schematic diagram showing the connections between modules in the simulation project. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0026] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0028] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0029] Example 1: See Figure 1 A bridge-land interconnected power supply system suitable for long-distance cross-sea bridges, comprising: The offshore power module converts renewable energy into electricity based on various types of offshore power plants; specifically, these offshore power plants utilize the sea area along the bridge to construct offshore wind turbines and offshore photovoltaic power generation arrays. In this embodiment, in addition to offshore wind power and offshore photovoltaic power stations, it also includes seawater temperature difference power stations, salt difference power stations, ocean current power stations, offshore biomass power stations and a series of offshore power stations that can convert offshore renewable energy into electric energy.

[0030] Bridge power module, based on various types of bridge power stations on the bridge deck, converts renewable energy into electric energy; Bridge energy storage module, based on various types of bridge energy storage stations on the bridge deck, stores and releases the electric energy generated by the power module; Bridge power supply module, based on power supply equipment on the bridge deck, meets the needs of various power utilization facilities; the power supply equipment includes direct current power supply equipment and alternating current power supply equipment; In this embodiment, the power supply equipment includes low-voltage direct current power supply equipment (such as 110V), medium-voltage direct current power supply equipment (such as 220V), low-voltage power frequency alternating current power supply equipment (such as 380V, 50Hz), medium-voltage power frequency alternating current power supply equipment (such as 110V, 50Hz), medium-voltage non-power frequency alternating current power supply equipment (such as 110V, 60Hz), other voltage and frequency alternating current power supply equipment, etc.

[0031] Bridge-land networking module, based on the bridge cable laying power transmission line, connects the offshore power module, the bridge power module, the bridge energy storage module, the bridge power supply module and the intelligent control module into a whole, and interconnects with the land power grid on both sides of the bridge; In this embodiment, in addition to the power transmission line, it also includes various types of connectors, switches, communication lines and other equipment connected to the line.

[0032] Intelligent control module, based on the power generation capacity of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the demand of the bridge power supply module, calculates to meet the bridge power supply as the target, judges the power transmission direction and scale between the bridge-land networking module and the land power grid on both sides of the bridge.

[0033] In this embodiment, the intelligent control module includes a data acquisition and monitoring module, an energy management module, a safety protection module and an information transmission communication module; based on the power generation capacity of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the demand of the bridge power supply module, the best operation mode between the modules is coordinated, the optimal scheduling between the modules is realized, and the power transmission direction and scale between the bridge-land networking module and the land power grid on both sides of the bridge is controlled.

[0034] The connection between the modules of the bridge-land networking power supply system is as follows Figure 1As shown, the bridge-land networking power supply system is composed of offshore power supply module, bridge power supply module, bridge energy storage module, bridge power supply module, land networking module and intelligent control module. The offshore power supply module, bridge power supply module and bridge energy storage module are aggregated and constructed into a whole through the intelligent control module. The demand of various power facilities on the bridge deck is met through the bridge power supply module. The interconnection with the land power grid on both sides of the bridge is realized through the bridge-land networking module.

[0035] As a preferred embodiment of the present embodiment, the power generation station on the bridge deck specifically utilizes the traffic safety facilities and auxiliary structures on the bridge deck to construct distributed photovoltaic power generation arrays. The power generation station under the bridge deck specifically utilizes the underwater part of the bridge pier to install wave power generation devices.

[0036] In the present embodiment, in addition to the bridge deck photovoltaic and underwater wave power generation device, the bridge deck also includes emergency diesel generating set and distributed wind power, as well as a series of power generation devices such as seawater temperature difference power generation device, salt difference power generation device and biomass power generation device under the bridge.

[0037] As a preferred embodiment of the present embodiment, the traffic safety facilities and auxiliary structures on the bridge deck include central median, guardrail, anti-glare board and safety idle space above part of the road surface.

[0038] As a preferred embodiment of the present embodiment, the various energy storage power stations on and under the bridge deck include various electrochemical energy storage devices on the bridge deck and compressed air energy storage devices under the bridge deck.

[0039] In the present embodiment, in addition to the electrochemical energy storage devices on the bridge deck and compressed air energy storage devices under the bridge deck, a series of energy storage devices such as gravity energy storage, flywheel energy storage, hydrogen energy storage, salt difference energy storage, thermal energy storage and floating energy storage platform are also included, which can store and release the electric energy generated by the power supply module.

[0040] As a preferred embodiment of the present embodiment, the installation mode of the power supply equipment includes fixed type, mobile type and hybrid type, and the device interface with various power facilities on and under the bridge deck is realized to be universalized and standardized.

[0041] As a preferred embodiment of the present embodiment, the various power facilities include bridge self-power, traffic facility charging and changing equipment and marine industry power equipment.

[0042] In the present embodiment, the various power facilities on and under the bridge deck include: bridge self-power, which is used to realize the functions of daily lighting, monitoring and maintenance of the bridge; traffic facility charging and changing, which constructs charging and changing stations in the service area on the bridge to provide green energy for passing vehicles; and marine industry power, which utilizes the water surface and underwater structure of the bridge pier to develop marine ranches, carry out aquaculture, environmental monitoring and leisure tourism activities, etc.

[0043] As a preferred embodiment of the present embodiment, the step of calculating and determining the power transmission direction and scale between the bridge-land networking module and the land power grid on both sides of the bridge with the goal of first meeting the power supply of the bridge is specifically: When the total power generation of the offshore power supply + the bridge power supply is greater than the sum of the bridge power supply demand + the bridge energy storage capacity, the bridge-land networking module will send the surplus power to the land power grid on both sides of the bridge. The specific determination formula is as follows:

[0044] In the formula, is the power generation of the offshore power supply module, is the serial number of the offshore power supply module, is the total number of offshore power supply modules; is the power generation of the bridge power supply module, is the serial number of the bridge power supply module, is the total number of bridge power supply modules; is the demand of the bridge power supply module, is the serial number of the bridge power supply module, is the number of bridge power supply modules; is the total capacity of the bridge energy storage module, is the serial number of the bridge energy storage module, is the number of bridge energy storage modules; When the sum of the offshore power generation + the bridge power generation + the bridge energy storage capacity is less than the bridge power supply demand, the land power grid on both sides of the bridge will supplement the power supply to the bridge-land networking module. The specific determination formula is as follows:

[0045] When the total power generation of the offshore power supply + the bridge power supply is greater than or equal to the bridge power supply demand, and less than or equal to the sum of the bridge power supply demand + the bridge energy storage capacity, the bridge-land networking module does not need to supply power to the land power grid on both sides of the bridge, and is in a self-balancing state. The specific determination formula is as follows:

[0046] Based on the above bridge-land networking power supply system, simulation tests are carried out, and the specific steps are as follows: A coastal sea-crossing bridge connecting the mainland and a nearby peninsula with a length of more than 40 kilometers is selected. The bridge is rich in offshore wind power and photovoltaic resources along the line, and is used for three-dimensional composite utilization demonstration.

[0047] The offshore power supply of the demonstration project includes 1 offshore wind power and 1 offshore photovoltaic power constructed in the sea area along the bridge; the bridge power supply includes distributed photovoltaic power generation arrays constructed in the central isolation belt, guardrails, anti-glare boards and part of the space above the road surface of the bridge deck, and wave power generation devices installed in the underwater part of the bridge pier; the bridge energy storage includes 1 electrochemical energy storage on the bridge deck and 1 compressed air energy storage power station under the bridge deck; the bridge power utilization facilities include the power utilization of the bridge itself, the charging and battery swapping station in the bridge service area and the marine ranch under the bridge deck.

[0048] The connection state between the modules is as shown in Figure 2 The specific connection mode is as follows: (1) The offshore power supply module, the bridge power supply module, the bridge energy storage module and the bridge power supply module are connected to the bridge-land networking module, thereby forming a whole; (2) The bridge-land networking module is interconnected with the land power grids on both sides of the bridge, and can be further interconnected with more onshore power grids or bridge-land networking modules; (3) The intelligent control module is connected to the bridge-land networking module, coordinates the optimal operation mode between the modules, realizes the optimal scheduling between the modules, and controls the direction and scale of power transmission between the bridge-land networking module and the land power grids on both sides of the bridge.

[0049] Three typical working conditions are selected, and the power generation or power utilization scales of the modules are shown in Table 1, wherein the maximum total charging and discharging scale of the bridge energy storage module is S=-20MW~+20MW.

[0050] Table 1 Power generation or power utilization scales of modules in different typical working conditions Unit: KW

[0051] (1) Sunny noon working condition: The total power generation of the offshore power supply module is H1=45MW, the total power generation of the bridge power supply module is Q1=30MW, and the total power of the bridge power supply module is L1=52MW.

[0052] It is satisfied that (H1+Q1)>(L1+S1), even if the energy storage is in the full charging state, the bridge-land networking module still needs to transport surplus power to the land power grids on both sides of the bridge.

[0053] (2) Night working condition: The total power generation of the offshore power supply module is H2=35MW, the total power generation of the bridge power supply module is Q2=20MW, and the total power of the bridge power supply module is L2=59MW.

[0054] It is satisfied that (H2+Q2+S2)>L2>(H2+Q2), so the energy storage is in the discharging mode, and the bridge-land networking module and the land power grids on both sides of the bridge do not need to transport power to each other, and are in a self-balancing state.

[0055] (3)Cloudy day condition: The total power generation of the offshore power module H3 = 20 MW, the total power generation of the bridge power module Q3 = 16 MW, and the total power of the bridge power supply module L3 = 58 MW.

[0056] Satisfying (H3 + Q3 + S3) < L3, even when the energy storage is in the full discharge mode, there is still a shortage of electric energy in the bridge-land interconnection module, and power needs to be supplied to the bridge from both sides of the bridge.

[0057] Embodiment 2: A bridge-land interconnection power supply method applicable to long-distance cross-sea bridges, the specific steps include: Converting renewable energy into electric energy based on various offshore power generation power stations; the various offshore power generation power stations are specifically to utilize the sea areas along the bridge to build offshore wind turbine generators and offshore photovoltaic power generation arrays; Converting renewable energy into electric energy based on various power generation power stations above and below the bridge deck; Storing and releasing the electric energy generated by the power module based on various energy storage power stations above and below the bridge deck; Meeting the needs of various electrical facilities based on the power supply equipment above and below the bridge deck; the power supply equipment includes DC power supply equipment and AC power supply equipment; Laying transmission lines based on the bridge truss to connect the offshore power module, the bridge power module, the bridge energy storage module, the bridge power supply module and the intelligent control module into a whole, and interconnecting with the onshore power grids on both sides of the bridge; Calculating based on the power generation capabilities of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the requirements of the bridge power supply module, with the goal of first meeting the bridge power supply, to judge the power transmission direction and scale between the bridge-land interconnection module and the onshore power grids on both sides of the bridge.

[0058] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A bridge-land interconnected power supply system suitable for long-distance cross-sea bridges, characterized in that, include: The offshore power module converts renewable energy into electricity based on various offshore power stations; specifically, these offshore power stations utilize the sea area along the bridge to construct offshore wind turbines and offshore photovoltaic arrays. The bridge power module converts renewable energy into electricity based on various on- and off-deck power stations. The bridge energy storage module stores and releases the electricity generated by the power modules based on various on- and off-deck energy storage stations. The bridge power supply module meets the needs of various electrical facilities based on the on- and off-deck power supply equipment; this power supply equipment includes both DC and AC power supply equipment. The bridge-land interconnection module, based on the power transmission lines laid on the bridge's bridge deck, connects the offshore power module, bridge power module, bridge energy storage module, bridge power supply module, and intelligent control module into a whole, and interconnects with the onshore power grids on both sides of the bridge. The intelligent control module, based on the power generation capacity of the offshore power module and bridge power module, the capacity of the bridge energy storage module, and the needs of the bridge power supply module, calculates and determines the direction and scale of power transmission between the bridge-land interconnection module and the onshore power grids on both sides of the bridge, with the goal of first meeting the power supply needs of the bridge.

2. The bridge-land interconnection power supply method applicable to long-distance cross-sea bridges according to claim 1, characterized in that, The power station on the bridge deck is specifically a distributed photovoltaic power generation array constructed using traffic safety facilities and ancillary structures on the bridge deck, while the power station under the bridge deck is specifically a wave energy power generation device installed on the underwater portion of the bridge piers.

3. The bridge-land interconnection power supply method applicable to long-distance cross-sea bridges according to claim 2, characterized in that, The traffic safety facilities and ancillary structures on the bridge deck include a central median strip, guardrails, anti-glare panels, and some safe open space above the road surface.

4. The bridge-land interconnection power supply method applicable to long-distance cross-sea bridges according to claim 1, characterized in that, The various bridge deck and under-bridge energy storage power stations include electrochemical energy storage devices on various bridge decks, as well as compressed air energy storage devices under the bridge decks.

5. A bridge-land interconnection power supply method suitable for long-distance cross-sea bridges according to claim 1, characterized in that, The power supply equipment can be installed in fixed, mobile, or hybrid ways, and its interfaces with various electrical facilities on and under the bridge are universal and standardized.

6. A bridge-land interconnection power supply method suitable for long-distance cross-sea bridges according to claim 1, characterized in that, The various power facilities include the bridge's own power supply, charging and swapping equipment for transportation facilities, and power equipment for the marine industry.

7. A bridge-land interconnection power supply method suitable for long-distance cross-sea bridges according to claim 1, characterized in that, The specific steps for calculating and determining the direction and scale of power transmission between the bridge-land network module and the land power grid on both sides of the bridge, with the goal of first satisfying the power supply needs of the bridge, are as follows: When the total power generation from the offshore power source and the bridge power source exceeds the sum of the bridge's power demand and its energy storage capacity, the bridge-land grid interconnection module will send the surplus power to the onshore power grid on both sides of the bridge. The specific judgment formula is as follows: In the formula, This refers to the power generation of the offshore power module. This is the serial number of the marine power module. This represents the total number of offshore power modules. This refers to the power generation of the bridge's power module. This is the serial number of the bridge power module. This represents the total number of power modules for the bridge. The power supply module requirements for the bridge This is the serial number of the power supply module for the bridge. The number of power supply modules for the bridge; This represents the total capacity of the bridge's energy storage modules. This is the serial number of the bridge's energy storage module. This refers to the number of energy storage modules for the bridge. When the sum of the power generation from the offshore power source, the power generation from the bridge power source, and the energy storage capacity of the bridge is less than the power supply demand of the bridge, the onshore power grids on both sides of the bridge will supplement the power supply to the bridge-land interconnection module. The specific judgment formula is as follows: When the total power generation of the offshore power source and the bridge power source is greater than or equal to the bridge's power supply demand, and less than or equal to the sum of the bridge's power supply demand and the bridge's energy storage capacity, the bridge-land grid interconnection module does not need to supply power to the onshore power grids on both sides of the bridge and is in a self-balancing state. The specific judgment formula is as follows: 。 8. A bridge-land interconnection power supply method suitable for long-distance cross-sea bridges, characterized in that, The specific steps include: Renewable energy is converted into electricity through various types of offshore power plants; these various types of offshore power plants specifically utilize the sea area along the bridge to construct offshore wind turbines and offshore photovoltaic power generation arrays. Renewable energy is converted into electricity by various bridge-mounted and above-ground power stations; Various bridge-mounted and under-bridge energy storage stations store and release the electrical energy generated by the power modules; The bridge deck power supply equipment meets the needs of various electrical facilities; the power supply equipment includes DC power supply equipment and AC power supply equipment. Based on the bridge's bridge deck, the power transmission lines are laid, connecting the offshore power module, the bridge power module, the bridge energy storage module, the bridge power supply module, and the intelligent control module into a whole, and interconnecting with the onshore power grid on both sides of the bridge. Based on the power generation capacity of the offshore power module and the bridge power module, the capacity of the bridge energy storage module, and the demand of the bridge power supply module, calculations are performed with the goal of first meeting the power supply needs of the bridge, to determine the direction and scale of power transmission between the bridge-land interconnection module and the onshore power grid on both sides of the bridge.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the bridge-land interconnection power supply method as described in claim 8, applicable to long-distance cross-sea bridges.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the bridge-land interconnection power supply method as described in claim 8 for long-distance cross-sea bridges.

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