Offshore wind power energy storage system combining wind energy and solar energy

Abstract

This invention discloses an offshore wind power energy storage system combining wind and solar energy, comprising: a fixed subsea device installed on the seabed, with multiple fixed subsea devices distributed in different areas of the seabed; an airbag unit, with the upper part of each fixed subsea device connected to the lower part of an airbag unit via a towing rope; a towing device located on the sea surface, with each fixed subsea device corresponding to a towing device, and the towing rope of the fixed subsea device bypassing the fixed subsea device before connecting to the towing device, the towing device controlling the depth of the corresponding airbag unit in the sea through the towing rope; and an air compressor unit and a pipeline control system. This invention enables the airbag unit to avoid undercurrent areas in a timely manner according to the type of undercurrent, thus avoiding danger and reducing damage to the airbag unit from undercurrents, thereby effectively resisting undercurrent disasters.

Description

Technical Field

[0001] This invention belongs to the field of energy storage technology, specifically relating to an offshore wind power energy storage system that combines wind and solar energy. Background Technology

[0002] As power generation technologies mature, especially with the large-scale expansion of solar and wind power generation, which are now extending beyond land to include offshore areas, clean energy offers significant advantages over thermal power. However, it also has drawbacks. For example, wind power generation is highly seasonal, with stable and sufficient output during windy seasons, but severely insufficient and unstable output during dry seasons. Solar power efficiency, on the other hand, is directly related to daily solar radiation intensity. Therefore, combining wind and solar energy into a combined power generation system can, to some extent, compensate for each other's shortcomings, but situations of overcapacity and undercapacity still exist.

[0003] To address the issue of excess power generation, an effective existing method is to convert electrical energy into other forms. For example, patent application number 202411753310.0 discloses an integrated offshore subsea power generation and storage system. This system combines compressed air energy storage with Pascal's law and the principle of hydrostatic pressure to convert electrical energy into high-pressure air, which is then stored in a flexible, constant-pressure air bladder on the seabed. When power generation is needed, the compressed air is released to generate electricity on demand. This solves the problem.

[0004] Although the aforementioned integrated power generation and energy storage system can solve the problems of energy storage and power overcapacity, it still has the following shortcomings:

[0005] 1. The inflation volume of each flexible constant-pressure air reservoir is determined by its depth on the seabed. While the internal energy balances the internal and external pressures, the buoyancy of the air reservoir is not considered. Buoyancy is proportional to the tension generated by the fastening device. To further increase the air capacity, either the depth must be increased to overcome the increased buoyancy caused by the larger volume of the air reservoir, or the fastening device must be strengthened to generate greater tension. However, this places higher demands on the structural strength of the air reservoir itself. Therefore, flexible constant-pressure air reservoirs are operated by introducing a fixed amount of compressed air at a fixed depth. The depth cannot be adjusted in real-time according to the amount of compressed air introduced to balance the internal and external pressures; that is, dynamic equilibrium cannot be achieved.

[0006] 2. Utilizing seabed hydrostatic pressure to store high-pressure air effectively solves container and storage safety issues, but other risks exist on the seabed. These include horizontal and vertical currents, visible surface water flow, and the fact that flexible, constant-pressure air storage bladders are fixed at a fixed depth on the seabed. If encountering vertical or horizontal currents, it is impossible to mitigate the risks by adjusting the depth and tightening the bladder, meaning the equipment has low risk resistance and lacks a safety feature. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an offshore wind power storage system combining wind and solar energy. The system includes: multiple subsea anchors fixed to the seabed, distributed across different areas; individual airbag units, each connected to the bottom of an airbag unit via a tow rope from the top of the anchor; a tow device located on the sea surface, with each anchor corresponding to a tow device, the tow rope of which passes around the anchor before connecting to the tow device, the tow device controlling the depth of the corresponding airbag unit in the sea via the tow rope; an air compressor unit and a pipeline control system, the air compressor unit connected to all airbag units via the pipeline control system, and all airbag units interconnected via the pipeline control system, the pipeline control system controlling the air volume and pressure supplied to the airbag units by the air compressor unit and the connection / disconnection between airbag units; and a combined wind and solar power generation system, electrically connected to both the air compressor unit and the pipeline control system. It includes an airbag anti-deviation device located on the sea surface. Each airbag unit corresponds to one airbag anti-deviation device, and the airbag anti-deviation device is connected to the top of the airbag unit through a rope. The airbag anti-deviation device pulls the airbag unit through the rope.

[0008] A preferred embodiment of the offshore wind power energy storage system of the present invention is as follows: the seabed fixing device includes a fixed pulley group, a movable pulley, and a limiting bracket; the fixed pulley group and the limiting bracket are both fixedly installed on the seabed, the movable pulley is connected to the bottom of the airbag unit, the traction rope passes around the movable pulley and the fixed pulley and is then connected to the traction device, and there are at least three traction ropes between the movable pulley and the fixed pulley; the limiting bracket is provided with a longitudinal limiting cylinder located between the movable pulley and the fixed pulley, and the three traction ropes between the movable pulley and the fixed pulley all pass through the longitudinal limiting cylinder.

[0009] The preferred embodiment of the offshore wind power energy storage system in this invention is as follows: both the traction device and the airbag anti-deviation device are equipped with a tension detection component, which is used to detect the tension of the corresponding traction rope or the tension of the corresponding rope in real time.

[0010] The beneficial effects of the offshore wind power energy storage system in this invention are as follows:

[0011] 1. The airbag unit is restrained in the sea by tow ropes and cables. The airbag unit itself is elastically deformable, and its position can be adjusted according to the inflation volume. The deeper the airbag unit is, the greater the air pressure it can withstand. However, overcoming the hydrostatic pressure of the seabed requires even higher pressure, placing higher demands on the air compressor unit. Therefore, the excess electricity from the wind and solar power generation system is converted into a corresponding amount of compressed air, and the sinking depth of the airbag unit is selected based on the amount of compressed air. Alternatively, compressed air can be released to generate electricity according to power generation needs, while the depth of the airbag unit is adjusted accordingly to achieve a dynamic balance and flexible energy storage.

[0012] 2. Undersea currents can be horizontal or vertical. The tow rope and cable work together to adjust the depth of the airbag unit in the sea, allowing it to rise or fall. Depending on the type of current, the airbag unit can be avoided in time to minimize damage from the current and thus effectively resist current disasters. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the connection structure of the seabed fixing device, airbag unit, airbag anti-deviation device and traction device in this invention.

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 This is a schematic diagram of the pipeline connection of the offshore wind power energy storage system that combines wind and solar energy in this invention.

[0017] Reference numerals in the attached drawings: 1. Seabed fixing device; 101. Fixed pulley block; 102. Movable pulley; 103. Limiting bracket; 104. Guide wheel; 105. Longitudinal limiting cylinder; 2. Airbag unit; 3. Airbag anti-deviation device; 4. Traction device; 5. Traction rope; 6. Rope; 7. Offshore fixed platform. Detailed Implementation

[0018] In view of the shortcomings of the prior art, the inventors of this invention, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0019] Example 1;

[0020] like Figure 1 and Figure 2As shown in Embodiment 1, an offshore wind power energy storage system combining wind and solar energy is provided. It includes multiple fixed subsea installations 1, distributed across different areas of the seabed. The number of fixed subsea installations 1 is not limited; an appropriate number can be selected based on the power generation scale to provide a solid foundation for subsequent energy storage. The specific distribution of the fixed subsea installations 1 can be determined according to the seabed environment, such as a linear, matrix, or L-shaped distribution. Fewer installations are placed in areas with strong currents, and the distribution should be as wide as possible to avoid all installations falling into such areas. The specific distribution shape should primarily avoid areas with strong currents. In cases where avoidance is not possible, a small number of installations 1 are placed in areas with strong currents, while the majority are placed in calm waters, with an alternating distribution to prevent overly dispersed distribution that would lengthen the gas supply pipeline.

[0021] like Figure 1As shown, this embodiment also includes an airbag unit 2, an airbag anti-deviation device 3, and a traction device 4. Each underwater fixed device 1 is connected to the bottom of an airbag unit 2 via a traction rope 5. Each underwater fixed device 1 corresponds to a traction device 4, and the traction rope 5 of the underwater fixed device 1 passes around the underwater fixed device 1 before connecting to the traction device 4. The traction device 4 controls the depth of the corresponding airbag unit 2 in the sea via the traction rope 5. Each airbag unit 2 corresponds to an airbag anti-deviation device 3, and the airbag anti-deviation device 3 is connected to the top of the airbag unit 2 via a rope 6. The airbag anti-deviation device 3 pulls the airbag unit 2 via the rope 6. Both the airbag anti-deviation device 3 and the traction device 4 are installed and fixed on the sea surface, and can be fixed via an offshore fixed platform 7. The specific fixing method is not limited in this embodiment. The traction device 4 and the airbag anti-deviation device 3 can be selected from winches with tension detection components, used to detect the tension of the corresponding traction rope 5 or the corresponding rope 6 in real time. The traction device 4 and the airbag anti-deviation device 3 respectively hold the bottom and top of the airbag unit 2, keeping the airbag unit 2 stable in the sea. The specific structure of the seabed fixing device 1 includes a fixed pulley group 101, a movable pulley 102, and a limiting bracket 103. The fixed pulley group 101 and the limiting bracket 103 are both fixedly installed on the seabed. The movable pulley 102 is connected to the bottom of the airbag unit 2. The traction rope 5 passes around the movable pulley 102 and the fixed pulley before connecting to the traction device 4, and there are at least three sections of traction rope 5 between the movable pulley 102 and the fixed pulley. The three-section rope winding method of the movable pulley 102 and the fixed pulley reduces the traction load of the airbag anti-deviation device 3 and the traction device 4, and improves the ability to resist undercurrents. The limiting bracket 103 is provided with a longitudinal limiting cylinder 105 located between the movable pulley 102 and the fixed pulley. All three sections of traction rope 5 between the movable pulley 102 and the fixed pulley pass through the longitudinal limiting cylinder 105. The function of the longitudinal limiting cylinder 105 is to limit the excessive swaying or deviation of the traction rope 5 from the pulley groove when the airbag unit 2 is pushed away from its original position by the current, thus preventing the traction rope 5 from falling off the movable pulley 102 and the fixed pulley. In addition, to separate the airbag unit 2 from the traction rope 5, a guide wheel 104 can be installed on the seabed. The guide wheel 104 is located near the fixed pulley to change the position of the traction rope 5.

[0022] This embodiment takes the matrix distribution of the seabed fixed device 1 as an example. Figure 2 Each dashed box represents the location of the airbag anti-deviation device 3 and the traction device 4 corresponding to a seabed fixed device 1.

[0023] like Figure 3As shown, this embodiment also includes an air compressor unit and a pipeline control system. The air compressor unit is connected to all the airbag units 2 through the pipeline control system, and all the airbag units 2 are interconnected through the pipeline control system. The pipeline control system controls the amount and pressure of air supplied to the airbag units 2 by the air compressor unit, as well as the connection and disconnection between the airbag units 2. It also includes a wind-solar power generation system, which is electrically connected to both the air compressor unit and the pipeline control system. After the electricity generated by the wind-solar power generation system meets the electricity demand, the excess electricity is stored in other ways. For example, the excess electricity can be used to power the air compressor unit, compressing the air into high-pressure air. The high-pressure air is dried and filtered by the pipeline control system and distributed to the airbag units 2. The volume of each airbag unit 2 is determined by the amount of high-pressure air, but must not exceed the maximum tolerable volume. When electricity is needed, such as at night or during seasons with weak winds, the airbag unit 2 will convert the stored high-pressure air into electrical energy through a worm gear generator set. During peak power generation periods, energy is stored in the form of compressed air, and during off-peak power generation periods or peak power consumption periods, electricity is generated on demand according to the amount of electricity consumed, thus solving the problem of energy storage caused by over-generation.

[0024] Example 2:

[0025] Example 2 provides a vertical undercurrent avoidance method for underwater airbags, based on the offshore wind power storage system combining wind and solar energy from Example 1. The steps are as follows:

[0026] Step 1: Complete Underwater Energy Storage: First, pull all the traction devices 4 to lower the corresponding airbag units 2 to the same depth in the sea. Simultaneously, the corresponding airbag anti-deviation devices 3 are released to keep the traction ropes 5 and 6 taut at all times. The airbag units 2 are pulled up and down, keeping them in the sea and preventing them from drifting with the waves. Then, the air compressor unit compresses air, which is dried through the pipeline control system and then introduced into the airbag units 2. The volume of the airbag units 2 increases, but remains less than the maximum tolerance volume of the airbag units 2, maintaining the airbag units 2 at a suitable depth in the sea.

[0027] Step 2: If it is an upward undercurrent, perform the following checks and adjustments: If the tension detection component of one or more traction devices 4 detects that the tension has increased beyond the set value, and at the same time the tension detection component of the corresponding airbag anti-deviation device 3 detects that the tension has decreased, it is determined to be an upward undercurrent. The traction device 4 pulls one airbag unit 2 in the upward undercurrent down to the origin area of ​​the upward undercurrent, and at the same time the airbag anti-deviation device 3 releases synchronously. During the descent, the volume of the airbag unit 2 decreases and the internal pressure increases. The pipeline control system connects the airbag unit 2 with the one that is not in the undercurrent with the high pressure. Compressed air flows from the high-pressure end to the low-pressure end until the air pressure is balanced and the air path is disconnected. Because the flow velocity is slowest in the dissipation and origin regions at both ends of the undercurrent, and the middle region of the undercurrent has the characteristics of small area and fastest flow velocity, moving airbag unit 2 below the origin region minimizes the water flow impact on airbag unit 2. Simultaneously, water pressure reduces the volume of airbag unit 2, and water pressure also helps to expel some high-pressure air, further reducing the volume of airbag unit 2, thereby reducing flow resistance, further reducing the water flow impact force, and improving risk resistance. If, during the process of compressed air flowing from the high-pressure end to the low-pressure end, the volume of airbag unit 2 at the low-pressure end increases to the maximum tolerable volume, and the air pressure has not reached equilibrium, the air path is disconnected. The pipeline control system connects the high-pressure airbag unit 2 with another airbag unit 2 not in the undercurrent until the air pressure is balanced and the air path is disconnected. To prevent a single airbag unit 2 from becoming too large and bursting, if the air pressure of airbag unit 2 at the high-pressure end still has not reached equilibrium with the air pressure of other airbag units 2, the above operation is repeated until the air pressure is balanced and the air path is disconnected. Following this method, all airbag units 2 in the rising dark current are subjected to the same operation. Utilizing the increased air pressure after descent, the high-pressure end and the low-pressure end are connected only through the pipeline control system. Without the aid of external energy, the compressed air from the high-pressure end enters the low-pressure end, transferring the energy in the high-risk dark current to the risk-free area, thus ensuring equipment safety.

[0028] Step 3: If it is a descending undercurrent, perform the following checks and adjustments: If the tension detection components of one or more traction devices 4 detect a decrease in tension, and at the same time, the tension detection components of the corresponding airbag anti-deviation device 3 detect an increase in tension exceeding the set value, it is determined to be a descending undercurrent. The airbag anti-deviation device 3 slowly releases one airbag unit 2 in the descending undercurrent to descend to the dissipation zone of the descending undercurrent, while the traction device 4 synchronously recovers. During the descent, the volume of the airbag unit 2 decreases, and the internal pressure increases. The pipeline control system connects the airbag unit 2 with the one not in the undercurrent with the higher air pressure, and compressed air flows from the high-pressure end to the low-pressure end until the air pressure is balanced and the air passage is disconnected. S8: Repeat the same operation, performing the same operation on all airbag units 2 in the descending undercurrent in sequence.

[0029] Example 3:

[0030] Example 3 provides a method for avoiding horizontal currents using underwater airbags, based on the offshore wind power storage system combining wind and solar energy from Example 1. The steps are as follows:

[0031] Step 1: Complete underwater energy storage: All traction devices 4 pull the corresponding airbag units 2 down to the same depth in the sea, while the corresponding airbag anti-deviation devices 3 are released synchronously, keeping the traction ropes 5 and 6 taut at all times. The air compressor unit compresses air, which is dried through the pipeline control system and then introduced into the airbag units 2. The volume of the airbag units 2 increases, but remains less than the maximum tolerance volume of the airbag units 2, maintaining the airbag units 2 at the desired depth in the sea.

[0032] Step 2: To address the horizontal undercurrent, perform the following checks and adjustments: If one or more traction devices 4 detect a pull force exceeding a set value, and simultaneously, the corresponding airbag anti-deviation device 3 detects a pull force exceeding a set value, it is determined to be a horizontal undercurrent. The traction device 4 slowly releases one airbag unit 2 from the horizontal undercurrent, and the airbag anti-deviation device 3 pulls synchronously, causing the airbag unit 2 to rise and its volume to increase. During the ascent, if both pull force detection components detect a significant decrease in pull force, it indicates that the airbag unit 2 is above the horizontal undercurrent, and the current depth should be maintained. If the volume of airbag unit 2 in S4 increases to the maximum tolerable volume, and the two tension detection components detect that the tension has not decreased significantly, it indicates that airbag unit 2 is not separated from the horizontal undercurrent. The traction device 4 slowly pulls, and the airbag anti-deviation device 3 releases simultaneously. Airbag unit 2 descends to the seabed or descends below the horizontal undercurrent. The volume of airbag unit 2 decreases, and the internal air pressure rises. The pipeline control system connects the airbag unit 2 with the high air pressure with an airbag unit 2 that is not in the undercurrent. Compressed air flows from the high pressure end to the low pressure end until the air pressure is balanced and the air path is disconnected.

[0033] Step 3: Repeat the above operation, performing the same operation on all airbag units 2 in the horizontal undercurrent in sequence.

[0034] The horizontal undercurrent avoidance method in Example 3 adopts the same avoidance principle as the vertical undercurrent avoidance method in Example 2. Both methods use the traction device 4 and the airbag anti-deviation device 3 to adjust the specific position of the airbag unit 2 in the undercurrent, thereby separating the airbag unit 2 from the undercurrent. At the same time, the air pressure and volume of the airbag unit 2 are adjusted to reduce flow resistance and improve the equipment's risk resistance.

[0035] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A vertical undercurrent avoidance method for an underwater airbag, characterized by: Based on a wind and solar energy combined offshore wind power energy storage system, the offshore wind power energy storage system combined with wind and solar energy includes a fixed underwater device installed on the seabed, and multiple fixed underwater devices are provided and distributed in different areas of the seabed. The system includes: individual airbag units, with each subsea anchor connected to the bottom of an airbag unit via a tow rope; a tow device located on the sea surface, with each subsea anchor corresponding to a tow device, the tow rope of which loops around the anchor before connecting to the tow device, and the tow device controlling the depth of the corresponding airbag unit in the sea via the tow rope; an air compressor unit and a pipeline control system, the air compressor unit being connected to all airbag units individually through the pipeline control system, and all airbag units being interconnected through the pipeline control system, the pipeline control system controlling the amount and pressure of air supplied to the airbag units by the air compressor unit and the connection / disconnection between airbag units; and a wind and solar power generation system, electrically connected to both the air compressor unit and the pipeline control system. The underwater fixing device includes a fixed pulley group, a movable pulley, and a limiting bracket. The fixed pulley group and the limiting bracket are both fixedly installed on the seabed. The movable pulley is connected below the airbag unit. The traction rope passes around the movable and fixed pulleys before connecting to the traction device, and there are at least three sections of traction rope between the movable and fixed pulleys. The limiting bracket has a longitudinal limiting cylinder located between the movable and fixed pulleys, and the three sections of traction rope between the movable and fixed pulleys all pass through the longitudinal limiting cylinder. It also includes an airbag anti-deviation device located on the sea surface. Each airbag unit corresponds to one airbag anti-deviation device, and the airbag anti-deviation device is connected to the top of the airbag unit via a rope. The airbag anti-deviation device pulls the airbag unit via the rope. Both the traction device and the airbag anti-deviation device are equipped with a tension detection component for real-time detection of the tension of the corresponding traction rope or the tension of the corresponding rope. The steps are as follows: S1. All traction devices pull the corresponding airbag units down to the same depth in the sea, and at the same time, the corresponding airbag anti-deviation devices are released synchronously to keep the traction ropes and cables taut. S2. The air compressor unit compresses air, which is then dried by the pipeline control system and introduced into the individual airbag units. The volume of the individual airbag units increases, but remains smaller than the maximum tolerance volume of the individual airbag units, thus maintaining the depth of the individual airbag units in the sea. S3. If the tension detection component of one or more traction devices detects that the tension increases beyond the set value, and at the same time the tension detection component of the corresponding airbag anti-deviation device detects that the tension decreases, it is determined to be an upward undercurrent. S4. The traction device pulls one of the airbag units in the rising dark current down to the origin area of ​​the rising dark current. At the same time, the airbag anti-deviation device is released synchronously. During the descent, the volume of the airbag unit decreases and the internal pressure increases. The pipeline control system connects the airbag unit with the high pressure with an airbag unit that is not in the dark current. Compressed air flows from the high pressure end to the low pressure end until the air pressure is balanced and the air path is disconnected. S401. If the volume of the airbag unit at the low-pressure end of S4 increases to the maximum tolerable volume and the air pressure does not reach equilibrium, the air path is disconnected. The pipeline control system connects the airbag unit with high air pressure to another airbag unit that is not in the dark flow until the air pressure is balanced and the air path is disconnected. S402. If the air pressure in S401 has not yet reached equilibrium, repeat S401 until the air pressure is balanced and then disconnect the air passage. S5. Perform the same operation on all airbag units in the rising dark current in sequence, following S4~S402. S6. If the tension detection component of one or more traction devices detects a decrease in tension, and at the same time the tension detection component of the corresponding airbag anti-deviation device detects an increase in tension exceeding the set value, it is determined to be a downward undercurrent. S7. The airbag anti-deviation device slowly releases one of the airbag units in the descending dark current to descend to the dissipation zone of the descending dark current. At the same time, the traction device synchronously recovers it. During the descent, the volume of the airbag unit decreases and the internal pressure increases. The pipeline control system connects the airbag unit with the high pressure with an airbag unit that is not in the dark current. Compressed air flows from the high pressure end to the low pressure end until the air pressure is balanced and the air path is disconnected. S8. Repeat S401~S5 to perform the same operation on all airbag units in the descending dark stream in sequence.

2. A method for avoiding hazards in horizontal currents using an underwater airbag, characterized in that: Based on a wind and solar energy combined offshore wind power energy storage system, the offshore wind power energy storage system combined with wind and solar energy includes a fixed underwater device installed on the seabed, and multiple fixed underwater devices are provided and distributed in different areas of the seabed. The system includes: individual airbag units, with each subsea anchor connected to the bottom of an airbag unit via a tow rope; a tow device located on the sea surface, with each subsea anchor corresponding to a tow device, the tow rope of which loops around the anchor before connecting to the tow device, and the tow device controlling the depth of the corresponding airbag unit in the sea via the tow rope; an air compressor unit and a pipeline control system, the air compressor unit being connected to all airbag units individually through the pipeline control system, and all airbag units being interconnected through the pipeline control system, the pipeline control system controlling the amount and pressure of air supplied to the airbag units by the air compressor unit and the connection / disconnection between airbag units; and a wind and solar power generation system, electrically connected to both the air compressor unit and the pipeline control system. The underwater fixing device includes a fixed pulley group, a movable pulley, and a limiting bracket. The fixed pulley group and the limiting bracket are both fixedly installed on the seabed. The movable pulley is connected below the airbag unit. The traction rope passes around the movable and fixed pulleys before connecting to the traction device, and there are at least three sections of traction rope between the movable and fixed pulleys. The limiting bracket has a longitudinal limiting cylinder located between the movable and fixed pulleys, and the three sections of traction rope between the movable and fixed pulleys all pass through the longitudinal limiting cylinder. It also includes an airbag anti-deviation device located on the sea surface. Each airbag unit corresponds to one airbag anti-deviation device, and the airbag anti-deviation device is connected to the top of the airbag unit via a rope. The airbag anti-deviation device pulls the airbag unit via the rope. Both the traction device and the airbag anti-deviation device are equipped with a tension detection component for real-time detection of the tension of the corresponding traction rope or the tension of the corresponding rope. The steps are as follows: S1. All traction devices pull the corresponding airbag units down to the same depth in the sea, and at the same time, the corresponding airbag anti-deviation devices are released synchronously to keep the traction ropes and cables taut. S2. The air compressor unit compresses air, which is then dried by the pipeline control system and introduced into the individual airbag units. The volume of the individual airbag units increases, but remains smaller than the maximum tolerance volume of the individual airbag units, thus maintaining the depth of the individual airbag units in the sea. S3. If the tension detection component of one or more traction devices detects that the tension value exceeds the set value, and at the same time the tension detection component of the corresponding airbag anti-deviation device detects that the tension value exceeds the set value, it is determined to be a horizontal undercurrent. S4. The traction device slowly releases one of the airbag units in the horizontal undercurrent. The airbag anti-deviation device pulls synchronously, and the airbag unit rises and its volume increases. If the two tension detection components detect a significant decrease in tension during the ascent, it indicates that the airbag unit is above the horizontal undercurrent and maintains the current depth. S5. If the volume of the airbag unit in S4 increases to the maximum withstand volume, and the two tension detection components detect that the tension has not decreased significantly, it means that the airbag unit is not separated from the horizontal undercurrent. The traction device slowly pulls, and the airbag anti-deviation device releases simultaneously. The airbag unit descends to the seabed or below the horizontal undercurrent. The volume of the airbag unit decreases, and the internal air pressure rises. The pipeline control system connects the airbag unit with the high air pressure to an airbag unit that is not in the undercurrent. Compressed air flows from the high pressure end to the low pressure end until the air pressure is balanced and the air path is disconnected. S6. Repeat S4~S5, performing the same operation on all airbag units in the horizontal undercurrent in sequence.

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