110 results about "Single point mooring" patented technology

The invention provides a single-point mooring floating type fan platform capable of actively yawing, and belongs to the technical field of offshore wind power. The problem that the aerodynamic efficiency of an impeller is reduced due to the fact that a fan platform needs to bear multiple coupling effects of ocean currents and waves and the fan platform deviates from the best windward direction due to the hydrodynamic force coupling effect when an included angle is formed between the ocean current direction and the wind direction under the action of the complex ocean environment is solved. The system comprises a wind turbine generator, a mast type tower, a platform foundation, a single-point mooring device and a flow guide device, the edge of the platform foundation is connected with the single-point mooring device and can rotate by 360 degrees around the single-point mooring device. The flow guiding device is installed at the edge position of the platform foundation and arranged opposite to the single-point mooring device, the horizontal section of the flow guiding device is in a symmetrical streamline shape, and the flow guiding device is provided with a driving device which drives the flow guiding device to rotate in the horizontal direction and adjusts the acting force of ocean current on the fan platform. The power generation device is mainly used for improving the power generation efficiency of the mast type tower offshore wind turbine platform.

A gravity type variable-length seabed single-point mooring connecting device of a floating fan comprises a floating body with at least two pulley fairlead devices, a single-point anchor arranged on the seabed and connected with a rotatable device, and at least one weight located in water below the floating body. Wherein the heavy block is connected with the single-point anchor through a mooring rope passing through the pulley fair lead. The offshore mooring system is small in seabed coverage area, environment-friendly, high in mooring system efficiency, safer, more reliable, practical and feasible, has a wind indicator function, and can be used for offshore mooring positioning of the floating type wind power platform with the water depth ranging from 50 m to 300 m or even larger than 1500 m.

The invention discloses a tension leg single point mooring type floating fan platform. The floating body is located on the water surface and used for carrying a wind power generation device, and the tension leg mechanism is located under the water surface. The upper portion of the tension leg mechanism is movably connected with the floating body, and the lower portion of the tension leg mechanism is movably connected with an anchoring point underwater. When the floating body generates an upward or downward displacement trend under the action of wind and wave external force, the tension legs generate tension balance in the opposite direction on the floating body; when the floating body moves upwards, the tension legs are tensioned to prevent the rising height of the floating body, and when the floating body moves downwards, the tension of the tension legs resists the sinking amplitude of the floating body. The wind turbine platform has a multi-angle or multi-dimensional rotating function in the marine environment, the posture of the floating body can be dynamically adjusted according to the comprehensive load direction of wind, waves and flow, the balance direction is precisely matched with the floating body, and the platform can effectively capture wind energy and convert the wind energy into electric energy in the complex marine environment; and the adverse effect of external force on the stability and safety of the whole platform is effectively reduced.

The invention relates to the technical field of electric digital data processing, in particular to a single point mooring system liquid slip ring spring energy storage sealing ring optimization design method which comprises the following steps: establishing a two-dimensional axial symmetry model of a liquid slip ring spring energy storage sealing ring; the peak contact stress, the linear contact stress and the maximum shear stress of the liquid slip ring spring energy storage sealing ring under the actual working condition are obtained; establishing a sealing performance evaluation system of the liquid slip ring spring energy storage sealing ring; screening out key structure parameters to form a data set; constructing a back-propagation neural network model, training the weight and bias of the back-propagation neural network model, evaluating the trained back-propagation neural network model, and finally obtaining an optimal parameter combination and a finite element model based on the optimal parameter combination. According to the method, the optimal parameter combination meeting the sealing performance requirement can be determined, so that the overall sealing effect is improved, and the sealing reliability is improved.

The invention discloses a multifunctional ship single-point mooring chain stopper, which belongs to the technical field of ship equipment, and comprises a chain stopper seat welded on a deck; the stop assembly is rotationally connected to the chain control seat; the distance adjusting assembly is slidably connected to the surface of the stop assembly; the pin fixing assembly is connected to the interior of one end of the stop assembly in a clamped mode; the speed reduction assembly is slidably connected to the side face of the stop assembly. When it is observed that the gap between the anchor chain and the chain control switch blade is increased, the [-shaped stop block slides on the surface of the chain control switch blade, so that the inclined groove in the side face of the [-shaped stop block is tightly attached to the anchor chain all the time, and effective braking of the anchor chain is achieved. When the chain control knife switch is closed, energy of the anchor chain in the moving process can be absorbed and consumed through preferential contact of the speed reduction block and the anchor chain and the damping effect of hydraulic oil, impact force and vibration of the anchor chain are reduced, danger caused by closing when the anchor chain slides out at a high speed is relieved, and the chain control knife switch has the advantages of being high in stability and safety.

The invention relates to a single-point mooring system, in particular to a design method of a hydraulic locking device of an FPSO single-point mooring system, which comprises the following steps: S1, mounting a guide frame assembly; s2, the sliding shoe assembly is installed in the guide frame assembly; s3, the supporting assembly is assembled; s4, the fixing assembly is installed on the supporting assembly; s5, the locking assembly is installed between the guide frame assembly and the supporting assembly; s6, the supporting assembly is positioned and installed on the deck; s7, tie-back of the buoy from the mouth of the moon pool; s8, releasing the buoy from the mouth of the moon pool; the device has high efficiency, flexibility, stability, safety, strong adaptability, durability, reliability, safety and maintainability, is optimized in structure and easy to operate, and provides an efficient, stable and safe solution for mooring operation in ocean engineering.

The invention provides an active yaw control method for a single-point mooring floating type draught fan platform, and belongs to the technical field of offshore wind power. A wind direction angle is obtained in real time through a wind direction sensor, and the deviation between the wind direction angle and the azimuth angle of a platform main shaft is judged; the system calculates the average wind direction in a set time window so as to suppress the influence of high-frequency wind direction disturbance. The controller dynamically calls a model predictive control (MPC) algorithm according to wind direction deviation, outputs a target rotation angle of the flow guide rudder, drives the flow guide rudder to adjust the direction of the flow guide rudder, generates a yaw moment acting on the platform, and guides the platform to rotate around a single-point mooring rotor to realize active wind facing; the guide rudder assembly and the hydraulic driving system are arranged between the vertical columns with the heaving plates in cooperation with the platform, accurate and rapid attitude control can be achieved, and the wind facing capacity and the structural stability of the draught fan are remarkably improved. According to the wind turbine platform, the wind facing posture can be adjusted in real time according to the change of the wind direction, so that the wind energy utilization efficiency is improved, and the power generation requirement under the deep and far sea complex environment is met.

Aspects of the disclosure pertain to single point mooring systems and method used in relation to single point mooring systems wherein, the system divides the restoring weight for the mooring system in two and removes hinges and swivel joints from the gravitational load path suspending the restoring weight.

A floating photovoltaic system (1) comprising a flotation unit (100) and a mooring system (30), wherein the flotation unit (100) comprises at least one sail (2) having at least one vertical or near vertical photovoltaic panel (20) mounted on a mast (3) and supported on a base (5), wherein the base (5) further comprises at least one buoyancy element (10); and wherein the mooring system (30) comprises a single point mooring buoy (32) connected to at least one buoyancy element (10) or the base (5) via mooring lines (33), and at least one mooring line (34) from the single point mooring buoy (32) tethered to at least one anchor point (36).

The application discloses a kind of single-point mooring chain and anchor chain disc connection damage monitoring and inhibiting device and method, it is related to the inner turret type single-point mooring safety monitoring and protection technical field, the device is set in the tower body structure under the turret of the inner turret type single-point mooring system, including: motion measurement module, contact load measurement module, mooring chain measurement module, collaborative control module and inhibiting drive module, motion measurement module is used to obtain the motion characteristics of turret;Contact load measurement module is used to measure contact interface load and wear amount;Mooring chain measurement module is used to obtain chain body posture and tension;Collaborative control module carries out damage grade determination and instruction output;Inhibiting drive module executes pre-tightening force adjustment, mechanical locking and wear compensation to realize hierarchical inhibition.The application solves the problem of insufficient in-situ monitoring capability of contact interface in the prior art, lack of active inhibition means, realizes in-situ perception, intelligent determination and hierarchical inhibition of intelligent control of the damage of mooring chain and anchor chain disc connection.

The application discloses a special tool for adjusting and fixing a single-point mooring chain stopper, and relates to the technical field of ocean engineering.The special tool for adjusting and fixing a single-point mooring chain stopper comprises a chain stopper trunnion shell and two chain stopper X-axis joint cylinders, the chain stopper X-axis joint cylinders are located on the two sides of the chain stopper trunnion shell, the chain stopper X-axis joint cylinders can rotate around the chain stopper trunnion shell through internal pin shafts, the chain stopper trunnion shell is provided with a fixing tool on the side facing the chain stopper X-axis joint cylinders, and the fixing tool comprises a support fixed on the chain stopper trunnion shell and an eye ring fixed on the top end of the chain stopper X-axis joint cylinder.The first rotating shaft, the second rotating shaft and the fixing rod are arranged, the relative position of the first rotating shaft and the second rotating shaft is changed by adjusting the rotary motion of the left threaded rod and the right threaded rod at the two ends of the fixing rod, and the relative angle between the chain stopper trunnion shell and the chain stopper X-axis joint cylinder is adjusted and fixed.

The invention relates to the technical field of ocean energy development and utilization, in particular to a soft rigid arm single-point mooring wave energy power generation device which comprises a floating structure, a mooring support, a hinge power generation module, a mooring leg, a mooring arm, a column hinge shaft and a mooring tower. One end of the mooring leg is connected to the mooring support through one hinge power generation module, the other end of the mooring leg is connected to the lower end of the mooring arm through the other hinge power generation module, the upper end of the mooring arm is connected to the mooring tower through a column hinge shaft, and the mooring tower is fixedly installed on a seabed. The six-degree-of-freedom motion of the floating body can be subjected to energy capture, so that wave energy is converted; the flexible rigid arm single-point mooring system can adapt to the change of the wind wave direction and comply with the weather cock effect; the soft rigid arm single-point mooring system not only can position the wave energy power generation device, but also can convert wave energy, that is, the soft rigid arm single-point mooring system also has a wave energy conversion function.

The invention discloses a wave energy device combined with an internal turret type single-point mooring system, which comprises a rear bent pipe wave energy power generation device and the internal turret type single-point mooring system, wherein a rotary joint in the internal turret type single-point mooring system is detachably mounted at the bottom of the rear bent pipe wave energy power generation device; the rear elbow pipe is located below the gravity center of the rear elbow pipe wave energy power generation device; an inner turret in the inner turret type single-point mooring system is hollow and is divided into a plurality of cabins, and ballast water pumps are arranged at the bottoms of the cabins. The rotating joint is fixedly mounted below the gravity center position, and the inner side of the rotating joint is connected with the inner rotating tower, so that swaying, surging and rolling motions, irrelevant to power generation, of the wave energy power generation device under the action of an environmental load are reduced, and meanwhile, the pitching and heaving motions relevant to power generation cannot be influenced; by means of the adjustable ballast water inner turret type single point mooring system, the rear bent pipe wave energy power generation device can be controlled to keep good power generation efficiency under different sea conditions.

A high-voltage electrical power supply line for the provides a secure and water-proof connection transfer of high-voltage electricity through an inner high-voltage electrical cable between a single point mooring (SPM) buoy and / or a caternary anchor leg mooring (CALM) buoy and an LNG vessel moored to the SPM CALM buoy, with a secured connection on each end of the high-voltage electrical cable, disallowing and prevent current flow through high-voltage electrical cable until a secure and confirmed connection is established between connectors attaching the high-voltage electrical power supply line to the SPM CALM buoy and the LNG vessel.

This invention belongs to the field of energy supply and marine engineering for electric vessels at sea. It discloses a modular, mobile charging and swapping platform for electric vessels at sea and its operating method, solving the problem of frequent return-to-port charging for electric vessels due to reliance on shore-based charging facilities. The platform consists of multiple floating modules and a bow guide module. The modules are connected by hinged connectors, robotic arms, and connecting rods, allowing for flexible adjustment of the number of modules according to the power needs of different electric vessels. The platform utilizes renewable energy sources such as offshore wind farms for charging and is moved to the operating area of ​​the electric vessel by tugboat to provide power replenishment, reducing the time and cost of returning to port for charging. The platform employs a single-point mooring system, enabling flexible positioning during charging via the robotic arm. This invention significantly improves the operating efficiency and endurance of electric vessels at sea, reduces the frequency of returning to port for charging, and has broad application prospects, especially suitable for vessel operations in deep-sea and remote waters.

The application relates to the field of offshore wind power generation, in particular to a double-impeller wind turbine outer rotating tower type single-point mooring system which comprises a floating foundation, a first wind turbine, a second wind turbine and a single-point mooring device, the floating foundation comprises a main stand and a V-shaped support, the first wind turbine and the second wind turbine are separately installed on the top of the V-shaped support, the bottom of the main stand is provided with a lower floating box, the single-point mooring device comprises an outer rotating tower, a main bearing, an anchor chain disc and an anchor chain, the upper end of the main stand is provided with an outer extension column, the end of the outer extension column away from the main stand is provided with a mounting groove, the outer rotating tower is arranged in the mounting groove, the anchor chain disc is fixedly connected with the bottom of the outer rotating tower, one end of the anchor chain is connected with the anchor chain disc, and the other end is fixed with a seabed, the inner ring of the main bearing is connected with the outer rotating tower, and the outer ring is connected with the inner wall of the mounting groove, and the outer rotating tower and the main bearing are located above the waterline of seawater. The floating foundation of the application can rotate around the mooring point, the unit yawing system is cancelled, and the unit failure rate is reduced.

The invention provides an active yawing single-point mooring floating type fan platform based on the Magnus effect, and belongs to the technical field of offshore wind power. The problem that invalid energy consumption exists when an existing platform is prevented from deviating through a flow guide rudder structure under the condition that ocean current is inconsistent with the wind direction is solved. The wind turbine generator system comprises a wind turbine generator set, a supporting tower, a platform foundation and a single-point mooring device. The top end of the supporting tower is connected with a wind turbine generator set, the bottom end of the supporting tower is connected with the platform foundation, the platform foundation comprises a mooring stand column, a plurality of yaw adjusting stand columns and a plurality of connecting structures, the lower portions of the mooring stand columns are connected with a single-point mooring device, yaw adjusting devices are arranged on the yaw adjusting stand columns, and each yaw adjusting device comprises a rotating body. The rotating speed and the rotating direction of the rotating body can be adjusted, and the rotating body and ocean current act to generate the Magnus effect to generate acting force to drive the platform foundation to rotate around the single-point mooring device. The device is mainly used for improving the power generation efficiency of the fan platform.

The invention belongs to the technical field of ocean engineering, and discloses a design and optimization method of a single-point mooring system of a floating type double-fan foundation structure, which comprises the following steps: selecting an initial mooring mode; analyzing and calculating to find out control working conditions of mooring line tension and platform motion response and corresponding wind wave flow directions; the ship-shaped buoy is rotated to the optimal wave facing angle, and frequency domain hydrodynamic analysis is carried out; mooring time domain analysis is carried out, and parameters of a mooring line are modified; judging a mooring mode; carrying out mooring time domain analysis under the working condition corresponding to the maximum platform motion response, and judging the length of a mooring cable; s8, judging whether the motion response of the platform meets the specification or not, and if not, executing S8; redefining a group of mooring systems configured with counterweight chains, and finding out a counterweight chain sensitivity parameter combination meeting the specification requirements; and the counterweight chain with the lowest cost is selected for mooring time domain analysis until the platform motion response meets the standard design requirement, and the final mooring mode is determined. The construction and construction installation cost of the floating foundation mooring system is remarkably reduced.

The application discloses a three-wind-wheel floating type wind turbine generator structure and an automatic wind alignment control method. The system comprises a floating foundation, a main wind turbine generator set without a yaw system, an auxiliary wind turbine generator set without a yaw system and a single-point mooring system. The floating foundation comprises an upwind arm and a downwind arm. One end of the upwind arm is connected with one end of the downwind arm. An included angle is formed between the upwind arm and the downwind arm and between the downwind arms, and the downwind arms are symmetrically arranged. The main wind turbine generator set is arranged at the connection between the upwind arm and the downwind arm. The auxiliary wind turbine generator set is arranged at one end of the corresponding downwind arm away from the upwind arm. The single-point mooring system is arranged at one end of the upwind arm away from the downwind arm. The application has the advantages of low cost and high wind alignment precision.

The invention relates to the technical field of ocean engineering, and discloses a self-propelled fishery breeding platform with variable aquaculture water volume, which comprises a single-point mooring system (9), a ship-shaped main body structure of the self-propelled fishery breeding platform is a double-bottom double-side structure, and a plurality of groups of aquaculture net cages (2) with variable water volume are symmetrically arranged on the left side and the right side of the self-propelled fishery breeding platform; the scissor type arm-extending buoyancy tanks (3) rotationally connected with the main ship body support the fishing net trusses (4) to form the outer side boundary of the culture net cage (2); a single-point mooring system (9) is arranged at the head of the platform, and a fishery catch cold storage area (6), a living area (7) and a propelling system (8) are arranged at the tail of the platform. The scissor-type arm-extending buoyancy tanks are arranged in the breeding net cage areas on the two sides of the platform main hull and connected with the fishing net trusses, when the scissor-type arm-extending buoyancy tanks are opened, the fishing net trusses are driven to extend out of the two sides of the platform main hull together with flexible fishing nets at the bottom, the water volume of the breeding net cages is enlarged, and the breeding capacity of fishery products is improved.

The utility model relates to single point mooring field especially based on fluid transfer structure of single point mooring system, including symmetrical distribution's lower valve body, the inside center of lower valve body is equipped with round groove, the upper side of lower valve body is equipped with upper valve body, the upper side fixedly equipped with the integrated mounting box of upper valve body, the inside of mounting box is equipped with fixed connection's locating post, the inside of round groove is equipped with the valve core of rotation connection, the utility model discloses the device body is connected with fluid transmission pipeline, when the sea is rough, first pipeline place starts to break first, two lower valve bodies are far away from each other after the break of first pipeline, make the installation strip in two mounting boxes all from another mounting box and draw out, the rack and spur gear engagement drive spur gear rotation 90 degrees simultaneously, thereby drive valve core rotation degree closes transmission passage, make the device realize the self -lock of pipeline break -down under the condition of no power, further reduce the loss caused when fluid transmission pipeline damage.

The invention relates to a floating foundation for wind turbine generators and a method for installing a wind turbine generator on top of and performing maintenance on said foundation. The floating foundation includes a tower and two support legs pivotally connected to the tower, forming a tripod-like structure. The floating foundation may include hydrodynamic damping elements and a single point mooring system leaving the foundation free to weathervane. The invention also relates to a method for using the structure as a crane, lowering and raising the turbine platform against and from e.g. a service barge during maintenance or assembly.

The utility model discloses a kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing devices, including outer ring body, reinforcing support plate inner wall middle position is equipped with oil filler, and reinforcing support plate inside upper and lower edge is equipped with splicing slot, splicing slot inner wall is inserted and is installed with mounting block, and mounting block one side is rotatably embedded and installed with sliding bead, mounting block and reinforcing support plate one side are inserted and installed with first fixed bolt.This kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing device can be side supported by reinforcing support plate, and can be stably rotated by sliding bead, mounting block, and the effect is good, and high-efficiency corrosion-resistant treatment can be carried out by the zirconia ceramic ball material quality of ball and the double-layer structure of nano ceramic coating and organic fluorocarbon coating coating, can adapt to complex marine environment, and high-efficiency heat dissipation can be carried out while being fixed by bolt seat, heat-conducting block and second fixed bolt, and the effect is good.

The invention relates to a single-point mooring system, in particular to a bearing sealing device for the single-point mooring system, and the single-point mooring system comprises a central stand column, a rotary table and a bearing arranged between the central stand column and the rotary table; the water retaining plate is provided with a supporting ring, a water retaining plate and a support, the supporting ring is fixedly connected to the central stand column, and the water retaining plate is detachably installed on the supporting ring through bolts; the bottom of the support is detachably connected to the rotary table through bolts, and a rubber ring used for sealing is arranged on the top of the support. A buffer gasket is arranged at the bottom of the water baffle, and the top of the rubber ring makes contact with the buffer gasket. Through triple protection mechanisms of fixed sealing, dynamic sealing and external protection, and by matching with a regular lubrication maintenance function, all-directional protection of the bearing is realized, and long-term reliable operation of equipment under severe working conditions is ensured.

A single-pile-leg single-point mooring device capable of being matched with a shuttle tanker is provided with a base and a rotating tower, the base is provided with a circular base body, a pipeline platform is welded to the side face of the base body, and an insertion pile is fixed to the bottom of the base body. The turret is fixed on the base main body, the turret is provided with a round turret main body, a liquid slip ring is fixed in the turret main body, the liquid slip ring consists of a fixed slip ring and a movable slip ring, the turret main body is fixedly connected with the fixed slip ring, an adaptive tower is fixed at the bottom of the turret main body, and the adaptive tower is inserted into the turret main body from the upper part of the base main body to be fixed; and an S-shaped pipe group is fixed in the turret main body. The S pipe set is composed of an upper pipe section and a lower pipe section, the upper pipe section is fixedly connected with the movable sliding ring, the lower pipe section penetrates through the turret body, is located in the adaptive tower and is fixedly connected with the fixed sliding ring, and the free end of the upper pipe section is connected with a conveying pipeline on the cruise ship. Compared with a traditional semi-submersible single-point mooring device, the semi-submersible single-point mooring device has the advantages of being compact in structure, light in weight, convenient to operate, safe, reliable and the like and can be applied to deepwater sea areas.

The invention discloses a single-point mooring floating type offshore wind turbine which comprises a floating foundation, a mooring assembly and a sail, a tower drum is arranged on the floating foundation, a machine head is installed at the upper end of the tower drum, the mooring assembly comprises a mooring cable and a mooring foundation, the mooring cable is connected with the floating foundation and the mooring foundation, and the mooring cable is connected with the mooring foundation. The mooring foundation is suitable for being fixed to the seabed, the sail is installed above the floating foundation, and the floating foundation is suitable for being driven by the sail to rotate around the mooring cable so that a machine head can face the wind direction. The single-point mooring floating type offshore wind turbine has the advantages that the utilization rate of wind energy resources is high, and the power generation efficiency of the wind turbine is high.

The invention discloses a tension leg buoy type single-point mooring system which comprises a mooring column module, a buoy module and a buoy module. The mooring column module is used for being connected with a ship. The buoy device is used for stably floating on the sea surface, so that the ship is moored at a single point; the tying column module is arranged in the middle of the top of the buoy device; the acceleration folding and unfolding device is used for adjusting the floating state of the buoy and floats on the sea surface or sinks under the sea bottom; the tension leg platform is used for supporting the buoy device and is arranged under the buoy device; and the fixing module is used for fixing the quick tightening device and the tension leg platform. The device realizes instant switching of the states of the buoys, effectively prolongs the service life of the system, and shows excellent performance and adaptability. A tension leg system and an adjustable floating state buoy structure are combined, an acceleration retracting and releasing device is arranged, and the acceleration retracting and releasing system can retract the buoy under the sea surface when a severe environment comes, so that the safety of the whole single-point mooring system is improved, and the service life of the single-point mooring system is prolonged.

The invention discloses a single-point mooring system liquid slip ring sealing performance testing device, which belongs to the technical field of sealing performance testing and comprises a supporting and positioning mechanism, and a single-point mooring system liquid slip ring to be tested is placed on the supporting and positioning mechanism. The device further comprises a swing driving mechanism, a lifting driving mechanism and a rotation driving mechanism. The lifting driving mechanism is mounted above the swinging driving mechanism, and the rotating driving mechanism is mounted above the lifting driving mechanism; a supporting part of the supporting and positioning mechanism is mounted above the rotary driving mechanism, and a positioning part of the supporting and positioning mechanism is mounted on the side surface of the lifting driving mechanism; the device further comprises a sealing performance testing mechanism and a simulation dynamic control system. According to the device, oscillation, heaving and falling of the to-be-tested liquid slip ring of the single-point mooring system on the sea are simulated through the swing driving mechanism, the lifting driving mechanism and the rotation driving mechanism respectively, the working state of the liquid slip ring of the single-point mooring system during offshore operation is fully restored, and the test result of the liquid slip ring of the single-point mooring system is more accurate.

A high-voltage electrical power supply line for the provides a secure and water-proof connection transfer of high-voltage electricity through an inner high-voltage electrical cable between a single point mooring (SPM) buoy and / or a caternary anchor leg mooring (CALM) buoy and an LNG vessel moored to the SPM CALM buoy, with a secured connection on each end of the high-voltage electrical cable, disallowing and prevent current flow through high-voltage electrical cable until a secure and confirmed connection is established between connectors attaching the high-voltage electrical power supply line to the SPM CALM buoy and the LNG vessel.