KR20220095150A - Floating tidal power generation system with weather-vaning capability - Google Patents

Abstract

A tidal current power generation system according to an embodiment of the present invention includes a turntable buoy; a floating platform including a first fuselage hull rotatably and detachably attached to the turntable buoy and a second fuselage hull rotatably and detachably attached to the turntable buoy opposite the first fuselage hull; a power generation system coupled with the floating platform and generating power through tidal flow; and a mooring system having one end coupled to the turntable buoy and the other end coupled to the seabed, and supporting the turntable buoy to be moored at a predetermined position.

Description

Floating tidal current generation system that can follow the current direction {FLOATING TIDAL POWER GENERATION SYSTEM WITH WEATHER-VANING CAPABILITY}

The embodiment relates to a floating tidal current generation system, and more particularly, to provide a tidal current direction following type (weather-vaning) floating tidal power generation system including a twin cylindrical hull.

In general, marine energy for generating electric power using seawater can be divided into wave power generation, tidal power generation, tidal power generation, and seawater temperature difference power generation according to the power generation method. Wave power generation is a method of generating electricity by using the vertical motion of the sea surface caused by waves, and tidal power generation is a method of generating electricity using potential energy of the difference in height and the water level due to tidal phenomena caused by the gravitational force of the moon or the sun. , tidal power generation is a method of generating electricity using the kinetic energy of tidal currents caused by high and low tides, and seawater temperature differential power generation is a method of generating electricity using the temperature difference between the surface and deep seawater.

Among them, tidal power generation using the kinetic energy of tidal currents typically has a form of independently generating power using one turbine. Since the size of the turbine is limited in the shallow waters, a plurality of small turbines are installed to operate a plurality of generators.

The tidal power generation system fixed to the seabed has a problem in that it is quite difficult to install and construct the power generation device and to maintain the power generation device. In addition, the tidal power generation system has a difficulty in requiring yaw control by yawing according to the direction of the tidal current.

A floating tidal current generation system is required to solve these problems.

The embodiment is intended to provide a floating tidal power generation system capable of improving power generation efficiency by following the direction of the current.

The embodiment is to provide a floating tidal power generation system that can improve the ease of installation and maintenance of the tidal current system.

The problem to be solved in the embodiment is not limited thereto, and it will be said that the purpose or effect that can be grasped from the solving means or embodiment of the problem described below is also included.

A tidal power generation system according to an embodiment of the present invention includes a turntable buoy; a first body hull rotatably and detachably attached to the turntable buoy; and a second body hull rotatably and detachably attached to the turntable buoy opposite the first body hull; a power generation system coupled to the floating platform and generating power through tidal flow; and a mooring system having one end coupled to the turntable buoy, the other end fixed to the seabed, and supporting the turntable buoy to be moored at a predetermined position.

The first body hull may include: a first cylinder coupled to the turntable buoy at a first angle with respect to an imaginary reference line passing through the center of the turntable buoy; and a second cylinder extending from the first cylinder, wherein the second body hull includes: a third cylinder coupled to the turntable buoy at a second angle with respect to an imaginary reference line passing through a center of the turntable buoy; and a fourth cylinder extending from the third cylinder.

The second cylinder may be spaced apart from the fourth cylinder by a preset distance and disposed in parallel.

The power generation system may include: a wing unit coupled to the floating platform in a foldable structure; a turbine unit coupled to the wing unit and generating power through the tidal flow; and a power conversion unit disposed on the floating platform and converting power generated from the turbine unit.

The wing portion may include: a first wing portion coupled to the second cylinder and disposed opposite to each other based on an imaginary central axis penetrating the second cylinder in a longitudinal direction; and a second wing portion; and a third wing part coupled to the fourth cylinder and arranged symmetrically with respect to an imaginary central axis penetrating the fourth cylinder in the longitudinal direction. and a fourth wing portion.

The turbine unit may include a; first turbine unit to fourth turbine unit sequentially disposed in the first wing unit to the fourth wing unit in the second direction.

The first turbine part to the fourth turbine part may be disposed in at least one of a front direction or a rear direction of the first wing part to the fourth wing part.

The first wing to the fourth wing may be controlled to form a predetermined angle in the underwater direction with respect to the horizontal plane in the first operation mode, and may be controlled to be parallel to the horizontal plane in the second operation mode.

When a failure occurs in at least one of the first turbine unit and the fourth turbine unit, the first to fourth turbine units stop driving the first turbine unit and the fourth turbine unit, and the second When a failure occurs in at least one of the turbine unit and the third turbine unit, driving of the second turbine unit and the third turbine unit may be stopped.

The first wing part to the fourth wing part include a space therein, and in the first operation mode, seawater is introduced into the inner space of the first wing part to the fourth wing part in the underwater direction with respect to the horizontal plane. Controlled to form a predetermined angle or, in the second operation mode, the seawater filled in the inner space of the first to the fourth wing may be discharged and controlled to be parallel to the horizontal plane.

The power generation system includes a first hydraulic system and a second hydraulic system, wherein the first hydraulic system and the second hydraulic system have, in a first operation mode, the first wing to the fourth wing on a horizontal plane. A driving force may be provided to form a predetermined angle with respect to the underwater direction, and in the second operation mode, the driving force may be provided so that the first to the fourth wing portions are parallel to the horizontal plane.

The power cable may further include a power cable for transmitting the power generated through the power generation system to an external power grid, wherein the power cable may maintain a predetermined shape within a preset minimum allowable radius.

The tidal current system may further include a thrust device for controlling the rotation based on the turntable buoy by following the direction of the tidal current of the sea.

According to the embodiment, it is possible to provide a floating tidal current generation system that is strong against changes in tidal currents by using a twin body.

By connecting the power line to the moonpool of the turntable mooring buoy, the problem of kinking the power line due to a change in current can be prevented.

By adopting a structure in which the turntable mooring buoy and the floating platform can be separated, it can be moved to a safe sea area in the event of a major failure or unexpected conditions such as a typhoon. This can be improved.

A plurality of turbines arranged in the twin body are arranged symmetrically with each other, and by collectively controlling the symmetric turbines, instability (such as posture) due to a failure is solved, and power generation efficiency can be improved.

Various and advantageous advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a view showing a tidal power generation system according to an embodiment of the present invention.
Figure 2 is a view showing the shape of a part of the configuration of the tidal power generation system according to an embodiment of the present invention.
Figure 3 is a perspective view showing the operation of the tidal power generation system in the first operation mode according to an embodiment of the present invention.
Figure 4 is a schematic diagram showing the operation of the tidal power generation system in the first operation mode according to an embodiment of the present invention.
5 is a perspective view showing the operation of the tidal power generation system in the second operation mode according to an embodiment of the present invention.
6 is a schematic diagram showing the operation of the tidal power generation system in the second operation mode according to an embodiment of the present invention.
7 is a perspective view illustrating the connection of a power cable, a mooring line, and a turntable buoy according to an embodiment of the present invention.
8 is a schematic diagram illustrating a connection of a power cable, a mooring line, and a turntable buoy according to an embodiment of the present invention.

Since the present invention may have various changes and may have various embodiments, specific embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as second, first, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but the same or corresponding components are given the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted.

1 is a view showing a tidal power generation system according to an embodiment of the present invention.

The tidal current generation system 10 according to an embodiment of the present invention relates to a floating tidal current generation system.

Referring to FIG. 1 , a tidal power generation system 10 according to an embodiment of the present invention includes a turntable buoy 100 , a floating platform 200 , a power generation system 300 , a mooring system 400 , and a power transmission system 500 . may include

The turntable buoy 100 may be a device that can be floated on the sea. That is, the turntable buoy 100 may be implemented with a structure and material that can receive at least a portion of the buoyancy from the sea and float on a horizontal plane.

The turntable buoy 100 may refer to a turntable type buoy. The turntable buoy 100 may be implemented in a structure to which a structure is attached so as to be rotatable. According to one embodiment, the turntable buoy 100 may be implemented in a structure to which a structure is attached so that it can rotate in a direction parallel to the horizontal plane of the sea when it is floated on the sea.

The turntable buoy 100 may be connected to the floating platform 200 . The turntable buoy 100 may be coupled to the floating platform 200 . The turntable buoy 100 may be connected to the mooring system 400 . The turntable buoy 100 may be coupled to the mooring system 400 . The turntable buoy 100 may be connected to the floating platform 200 and the mooring system 400 to maintain a position in a predetermined range at sea.

The turntable buoy 100 may be connected to the power transmission system 500 . The turntable buoy 100 may be connected to a power line and a communication line. The turntable buoy 100 may be used as a connection point between a power line and a communication line for transmitting power generated from the floating platform 200 and various signals. At this time, the turntable buoy 100 may be implemented so that even when the floating platform 200 rotates due to bird tracking, the disconnection of power transmission and communication does not occur through an electric swivel structure or thrust control, etc. have.

The floating platform 200 may be attached to the turntable buoy 100 . Floating platform 200 can be configured to ensure direct connection with turntable buoy 100 by adopting a structure in which rotation is free to ensure bird followability (weather vaning) that actively adapts to the direction of the current. That is, the floating platform 200 rotates in response to a change in the direction of the current with respect to the turntable buoy 100 , so that the turbine rotor mounted on the floating platform 200 always responds to the current in an upstream direction and the maximum amount of power generation has the advantage of obtaining

The floating platform 200 may include a first body hull 210 and a second body hull 220 . The floating platform 200 may be configured in a twin-bar shape including a first body hull 210 and a second body hull 220 to improve roll stability during operation.

The first body hull 210 may be attached to the turntable buoy 100 . According to an embodiment, the first body hull 210 may be rotatably attached to the turntable buoy 100 . For example, when the turntable buoy 100 is floated on the sea, the first hull 210 may rotate in a direction horizontal to the horizontal plane of the sea around the turntable buoy 100 . That is, the first body hull 210 may rotate around the turntable buoy 100 according to the influence of an external force such as a current. According to an embodiment, the first body hull 210 may be detachably attached to the turntable buoy 100 . If periodic repair of the tidal power generation system 10, repair due to an unexpected failure, etc. is required, the first fuselage hull 210 may be separated from the turntable buoy 100 and a new first fuselage hull 210 may be combined. have. Through this, there is an advantage in that the power generation efficiency and management efficiency of the tidal current generation system 10 can be improved.

The second body hull 220 may be attached to the turntable buoy 100 . According to an embodiment, the second body hull 220 may be rotatably attached to the turntable buoy 100 . For example, when the turntable buoy 100 is floated on the sea, the second fuselage hull 220 may rotate in a direction horizontal to the horizontal plane of the sea around the turntable buoy 100 . That is, the second body hull 220 may rotate around the turntable buoy 100 according to the influence of an external force such as a current. According to an embodiment, the second body hull 220 may be detachably attached to the turntable buoy 100 . If periodic repair of the tidal power generation system 10, repair due to unexpected failure, etc. is required, the second fuselage hull 220 may be separated from the turntable buoy 100 and a new second fuselage hull 220 may be combined. have. Through this, there is an advantage in that the power generation efficiency and management efficiency of the tidal current generation system 10 can be improved.

The power generation system 300 may be coupled to the floating platform 200 and generate electricity through a tidal flow. To this end, the power generation system 300 may include a wing unit, a turbine unit, and a power conversion unit.

The wing may be coupled to the floating platform 200 . The wing part 310 may be coupled to the first body hull 210 and the second body hull 220 included in the floating platform 200 . The wing part 310 may include first to fourth wing parts. The first wing part and the second wing part may be coupled to the first fuselage hull 210 , and the third wing part and the fourth wing part may be coupled to the second fuselage hull 220 .

The wing part 310 may move according to an operation mode. The wing unit 310 may move according to the first operation mode operated during the power generation of the tidal power generation system 10 and the first operation mode operated during maintenance of the tidal power generation system 10 . In the first operation mode, the wing portion 310 may be controlled to face the underwater direction on a horizontal plane. On the other hand, in the second operation mode, the wing portion 310 may be controlled to be parallel to the horizontal plane. That is, the wing portion 310 may be implemented as a folding structure that can take different postures depending on the operation mode.

The turbine unit 320 may be disposed on the wing unit 310 . The turbine unit 320 may be disposed in at least one of the front direction and the rear direction of the wing unit 310 . The turbine unit 320 may include first to fourth turbine units. The first to fourth turbine parts may be disposed on the first to fourth wing parts, respectively. That is, the first turbine part may be disposed on the first wing part, the second turbine part may be disposed on the second wing part, the third turbine part may be disposed on the third wing part, and the fourth turbine part may be disposed on the fourth wing part. have.

The turbine unit 320 may be partially driven according to circumstances such as failure. For example, when a failure occurs in a specific turbine unit in the first operation mode, the operation of the other turbine unit opposite to the corresponding turbine unit in which the failure occurs may be stopped. A detailed description thereof will be described in detail with reference to the drawings below.

The turbine unit 320 may include a rotor and a nacelle. The rotor may include a hub and a blade, and the nacelle may include a gear box and a generator. According to an embodiment, when the turbine unit 320 includes the first to fourth turbine units, the first to fourth turbine units may include a rotor and a nacelle, respectively. The turbine unit 320 may transmit power generated through the rotor and the nacelle to the power conversion unit 330 .

The power conversion unit 330 may be disposed inside the floating platform 200 , and may convert power generated by the turbine unit 320 . The power converter 330 may convert the power generated by the turbine into other power having different current, voltage, frequency, and the like. To this end, the power conversion unit 330 may include a device capable of performing power conversion, such as a power conversion device, a transformer. The power converter 330 may transmit the converted power to the outside of the tidal power generation system 300 through the power cable 510 .

The mooring system 400 may operate so that the tidal current generation system 10 is moored at a predetermined position. The mooring system 400 may be implemented so that even when the floating platform 200 rotates due to bird tracking, power transmission and communication are not disconnected through an electric swivel structure or thrust control.

To this end, the mooring system 400 may include a mooring line 410 and a mooring anchor 420 .

One end of the mooring line 410 may be coupled to the turntable buoy 100 and the other end may be coupled to the sea floor, thereby supporting the turntable buoy 100 to be moored at a predetermined position. The mooring line 410 may transmit all the loads acting on the turntable buoy 100 to the mooring anchor 420 .

The mooring line 410 may be selected in material and mooring method in consideration of the motion and mooring load of the floating platform 200 due to waves and current external forces. For example, the mooring line 410 may be implemented with materials such as chains, ropes, and wires based on the motion and mooring load of the floating platform 200 , and mooring such as a spread type suspension mooring, tendon mooring, etc. can be implemented in this way.

The mooring anchor 420 may be coupled to the seabed. The mooring anchor 420 may be coupled to the other end of the mooring line 410 . Accordingly, the mooring anchor 420 can connect the seabed and the mooring line 410, and the turntable buoy 100 and the floating platform 200 connected to the mooring line 410 can be supported so that they can be moored at a predetermined position. have. The mooring anchor 420 may transmit the load transmitted from the mooring line 410 to the ground.

The mooring anchor 420 may be implemented in various forms depending on the mooring load and the characteristics of the seabed. The mooring anchor 420 may include a dredging anchor, a block anchor, a suction anchor, a pile anchor, and the like.

The power transmission system 500 may refer to a cable system for transmitting power generated by the tidal power generation system 10 and transmitting and receiving data for the operation of the tidal power generation system 10 . The power transmission system 500 may include a power cable 510 and a communication cable 520 .

The power cable 510 may have one end coupled to the turntable buoy 100 , the other end connected to the power grid, and transmit power generated by the turbine unit 320 to the power grid.

The power cable 510 and the communication cable 520 may be implemented as a dynamic cable. The power cable 510 and the communication cable 520 are constantly subjected to dynamic loads by the behavior of the floating platform 200 and the turntable buoy 100 according to external forces such as waves and currents. In addition, the power cable 510 and the communication cable 520 have a high risk of interference with the mooring line 410 . Since the risk of failure of the power cable 510 and the communication cable 520 is high due to this external environment, the design of the power cable 510 and the communication cable 520 to solve the problem is required. Accordingly, the power cable 510 and the communication cable 520 according to the embodiment of the present invention may be implemented in a double helix armor structure. The power cable 510 and the communication cable 520 should be designed to withstand multidirectional dynamic fatigue loads. To this end, the power cable 510 and the communication cable 520 according to an embodiment of the present invention may be equipped with protective equipment such as a connection part, a bent part, a connection part, and the like. Such protective gear may include a bend restrictor, a bend stiffener, and the like.

On the other hand, the tidal power generation system 10 may further include a thrust device (thrust) for controlling the rotation based on the turntable buoy 100 by following the direction of the current in the sea.

Figure 2 is a view showing the shape of a part of the configuration of the tidal power generation system according to an embodiment of the present invention.

Referring to FIG. 2 , as described above, the floating platform 200 according to the embodiment of the present invention may include a first body hull 210 and a second body hull 220 .

The first body hull 210 may include a first cylinder 211 and a second cylinder 212 . The first cylinder 211 may be coupled to the turntable buoy 100 at a first angle with respect to an imaginary reference line Ref1 passing through the center of the turntable buoy 100 . The first end of the first cylinder 211 may be coupled to the turntable buoy 100 at a first angle with respect to an imaginary reference line Ref1 passing through the center of the turntable buoy 100 . The second cylinder 212 may extend from the first cylinder 211 . The second cylinder 212 may extend from the second end of the first cylinder 211 . The second cylinder 212 may extend while forming a predetermined angle with respect to the longitudinal direction of the first cylinder 211 .

The second body hull 220 may include a third cylinder 221 and a fourth cylinder 222 . The third cylinder 221 may be coupled to the turntable buoy 100 at a second angle with respect to an imaginary reference line Ref1 passing through the center of the turntable buoy 100 . The first end of the third cylinder 221 may be coupled to the turntable buoy 100 at a second angle with respect to an imaginary reference line Ref1 passing through the center of the turntable buoy 100 . The fourth cylinder 222 may extend from the third cylinder 221 . The fourth cylinder 222 may extend from the second end of the third cylinder 221 . The fourth cylinder 222 may extend while forming a predetermined angle with respect to the longitudinal direction of the third cylinder 221 .

The first body hull 210 and the second body hull 220 may be symmetrically disposed with respect to an imaginary reference line Ref1 passing through the center of the turntable buoy 100 . The first cylinder 211 may be symmetrically disposed with respect to the third cylinder 221 and the virtual reference line Ref1 . Accordingly, the second angle may be equal to the size of the first angle. In addition, the second cylinder 212 may be symmetrically disposed with respect to the fourth cylinder 222 and the virtual reference line Ref1 . In this case, the second cylinder 212 and the fourth cylinder 222 may be parallel to each other. That is, the second cylinder 212 may be spaced apart from the fourth cylinder 222 by a predetermined distance and disposed in parallel.

Referring to FIG. 2 , as described above, the power generation system 300 according to the embodiment of the present invention may include first to fourth wing parts 311 to 314 .

The first wing part 311 and the second wing part 312 may be coupled to the first fuselage hull 210 . The first wing part 311 and the second wing part 312 may be coupled to the second cylinder 212 . The first wing part 311 and the second wing part 312 may be disposed to face each other based on an imaginary central axis Ref2 penetrating the second cylinder 212 in the longitudinal direction.

The third wing part 313 and the fourth wing part 314 may be coupled to the second fuselage hull 220 . The third wing part 313 and the fourth wing part 314 may be coupled to the fourth cylinder 222 . The third wing part 313 and the fourth wing part 314 may be disposed to face each other based on an imaginary central axis Ref3 penetrating the fourth cylinder 222 in the longitudinal direction.

Referring to FIG. 2 , the power generation system 300 according to the embodiment of the present invention may include first to fourth turbine units 321 to 324 .

The first turbine part 321 may be disposed on the first wing part 311 . The second turbine part 322 may be disposed on the second wing part 312 . The third turbine part 323 may be disposed on the third wing part 313 . The fourth turbine unit 324 may be disposed on the fourth wing unit 314 .

The first turbine part 321 to the fourth turbine part 324 may be disposed in at least one of a front direction or a rear direction of the first wing part 311 to the fourth wing part 311 to 314 . In one embodiment, as shown in FIG. 2 , the first to fourth turbine parts 321 to 324 may be disposed in the front direction of the first to fourth wing parts 311 to 314 . Here, the front direction may mean a direction in which the turntable buoy 100 is located. In another embodiment, the first to fourth turbine parts 321 to 324 may be disposed in the rear direction of the first to fourth wing parts 311 to 314 . Here, the rear direction may mean a direction away from the turntable buoy 100 .

In this way, the tidal current generation system 10 according to the embodiment of the present invention not only improves the stability during operation through the twin-bar type floating platform 200, but also improves the first body hull 210 and the second By distributing two turbine units and four integrated turbine units in the fuselage hull 220, respectively, there is an advantage in that it is possible to secure the stability of trim and pitch motion by the driving thrust of the turbine unit.

Hereinafter, a driving process of the tidal power generation system 10 according to an operation mode will be described with reference to FIGS. 3 to 6 .

Figure 3 is a perspective view showing the operation of the tidal power generation system in the first operation mode according to the embodiment of the present invention, Figure 4 is a schematic diagram showing the operation of the tidal current generation system in the first operation mode according to the embodiment of the present invention.

Figure 5 is a perspective view showing the operation of the tidal power generation system in the second operation mode according to the embodiment of the present invention, Figure 6 is a schematic diagram showing the operation of the tidal current generation system in the second operation mode according to the embodiment of the present invention.

The first operation mode according to an embodiment of the present invention may refer to an operation mode in which the tidal power generation system 10 performs power generation. 3 and 4 , in the first operation mode, the first to fourth wing parts 311 to 314 may be controlled to form a predetermined angle in the underwater direction with respect to the horizontal plane. In this case, the predetermined angle may be set based on the length of the blade part and the blade length of the turbine part.

According to an embodiment, in the first operation mode, the first to fourth wing parts 311 to 314 may form a predetermined angle such that the blades of the turbine unit disposed in each are disposed lower than the water surface. Through this, in the tidal current generation system 10 according to an embodiment of the present invention, the blades of each turbine unit may receive sufficient driving force from the tidal current.

In addition, according to one embodiment, in the first operation mode, the first blade 311 and the second blade 312 are the blades of the first turbine unit 321 and the blades of the second turbine unit 322 . A predetermined angle may be formed with the water surface to form a predetermined interval during operation. The third wing unit 313 and the fourth wing unit 314 have a predetermined angle with the water surface so that the blade of the third turbine unit 323 and the blade of the fourth turbine unit 324 form a predetermined interval during operation. can be formed Through this, each turbine unit of the tidal current generation system 10 can be prevented from being damaged due to interference during driving.

As described above, the first turbine part and the fourth turbine part 321 to 324 may be sequentially disposed on the first wing part to the fourth wing part 311 to 314 in the first direction to the second direction, respectively. And, in the first operation mode, the turbine parts corresponding to each other among the first to fourth turbine parts 321 to 324 may be driven by pairing with each other.

According to one embodiment, the first turbine unit 321 and the fourth turbine unit 324 disposed on the outside of the tidal current generation system 10 among the plurality of turbine units may be driven by being paired with each other. For example, when a failure occurs in at least one of the first turbine unit 321 and the fourth turbine unit 324 , the driving of the first turbine unit 321 and the fourth turbine unit 324 may be stopped. have.

According to an embodiment, the second turbine unit 322 and the third turbine unit 323 disposed inside the tidal current generation system 10 among the plurality of turbine units may be driven by being paired with each other. For example, when a failure occurs in at least one of the second turbine unit 322 and the third turbine unit 323 , the driving of the second turbine unit 322 and the third turbine unit 323 may be stopped. have.

In this way, even in case of emergency (such as stopping the first unit), by simultaneously stopping the turbine units disposed at positions opposite to each other, it is possible to secure the stability of the platform during operation and improve the power generation continuity.

The second operation mode according to an embodiment of the present invention may mean an operation mode in a state in which power generation is not performed. In the second operation mode, maintenance and management of the tidal power generation system 10 may be performed. For example, in the second operation mode, repair, maintenance, replacement of some components of the tidal power generation system 10 may be performed. 5 and 6 , in the second operation mode, the first to fourth wing parts 311 to 314 may be controlled to be parallel to a horizontal plane.

According to one embodiment, in the second operation mode, the blade of the first turbine part 321 disposed on the first wing part 311 and the second turbine part 322 disposed on the second wing part 312 . The blades may be spaced apart by a predetermined interval. In addition, the blade of the third turbine unit 323 disposed on the third wing unit 313 and the blade of the fourth turbine unit 324 disposed on the fourth wing unit 314 may be spaced apart from each other by a predetermined distance. . In addition, the blade of the second turbine part 322 disposed on the second wing part 312 and the blade of the third turbine part 323 disposed on the third wing part 313 may be spaced apart by a predetermined distance. . As such, in the second operation mode, the blades of each turbine unit are spaced apart, thereby preventing damage due to interference between the blades.

As such, the tidal turbine mounted on the folding wing of the floating platform 200 is located at 10.25 m underwater (the center of the nacelle of the turbine) during power generation operation, but it is maintained by allowing it to float to the surface for management and repair. It has the advantage of maximizing convenience.

In order to drive the wing unit according to the first operation mode and the second operation mode, the tidal power generation system 10 according to an embodiment of the present invention may use seawater.

To this end, the first to fourth wing parts 311 to 314 may include a space therein. In the first operation mode, the first to fourth wing parts 311 to 314 may be controlled to form a predetermined angle in the underwater direction with respect to the horizontal plane by introducing seawater into the inner space. On the other hand, in the second operation mode, the first to fourth wing parts 311 to 314 may be controlled to be parallel to the horizontal plane by discharging the seawater filled in the inner space.

In order to drive the wing unit according to the first operation mode and the second operation mode, the tidal current generation system 10 according to another embodiment of the present invention may use a hydraulic system.

To this end, the first body hull 210 and the second body hull 220 may include a first hydraulic system and a second hydraulic system. At this time, the first hydraulic system provides driving force to the first wing unit 311 and the second wing unit 312 , and the second hydraulic system provides driving force to the third wing unit 313 and the fourth wing unit 314 . can provide The first hydraulic system and the second hydraulic system may provide driving force so that, in the first operation mode, the first to fourth wing parts 311 to 314 form a predetermined angle in the underwater direction with respect to the horizontal plane. On the other hand, the first hydraulic wing unit and the second hydraulic system may provide a driving force so that the first to fourth wing units 311 to 314 are parallel to the horizontal plane in the second operation mode.

7 is a perspective view illustrating the connection of a power cable, a mooring line, and a turntable buoy according to an embodiment of the present invention, and FIG.

7 and 8 , the power cable 510 and the mooring line 410 may be connected to the turntable buoy 100 . Specifically, the power cable 510 may be coupled to the turntable buoy 100 through a moonpul disposed in the center of the turntable buoy 100 .

As described above, the turntable buoy 100 according to the embodiment of the present invention may be rotatably connected to the floating platform 200 to be freely rotatable. Accordingly, the tidal power generation system 10 can secure the tidal followability (weather vaning) to actively adapt to the tidal direction. Accordingly, the turntable buoy 100 may be utilized as a connection point between the power cable 510 and the communication cable 520 for transmitting power generated from the floating platform 200 and various signals.

Power cable 510 and communication cable 520, which are always in motion in the water, while maintaining a minimum allowable radius (MBR), to avoid contact with the seabed, interference with the mooring line 410, etc. It may be configured to always maintain a specific underwater shape. According to an embodiment of the present invention, the power cable 510 and the communication cable 520 may always maintain a specific modified shape of the power cable 510 and the communication cable 520 through an auxiliary device such as an underwater buoy. .

In the above, the embodiment has been mainly described, but this is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in the range that does not depart from the essential characteristics of the present embodiment. It can be seen that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

10: tidal power system
100: turntable buoy
200: floating platform
300: power generation system
400: mooring system
500: power transmission system

Claims (13)

turntable buoy;
a first body hull rotatably and detachably attached to the turntable buoy; and a second body hull rotatably and detachably attached to the turntable buoy to face the first body hull;
a power generation system coupled to the floating platform and generating power through tidal flow; and
A tidal power generation system comprising a; one end coupled to the turntable buoy, the other end coupled to the sea floor, and a mooring system for supporting the turntable buoy to be moored at a predetermined position. According to claim 1,
The first fuselage hull,
a first cylinder coupled to the turntable buoy at a first angle with respect to an imaginary reference line passing through a center of the turntable buoy; and a second cylinder extending from the first cylinder.
The second fuselage hull,
a third cylinder coupled to the turntable buoy at a second angle with respect to an imaginary reference line passing through the center of the turntable buoy; and a fourth cylinder extending from the third cylinder. 3. The method of claim 2,
The second cylinder is
The tidal current generation system is spaced apart from the fourth cylinder by a predetermined distance and arranged in parallel. 3. The method of claim 2,
The power generation system is
a wing unit coupled to the floating platform in a foldable structure;
a turbine unit coupled to the wing unit and generating power through the tidal flow; and
A tidal power generation system comprising a; is disposed on the floating platform and converts the power produced by the turbine unit. 5. The method of claim 4,
The wing portion,
first wing portions coupled to the second cylinder and disposed to face each other based on a virtual central axis penetrating the second cylinder in the longitudinal direction; and a second wing portion; and
a third wing portion coupled to the fourth cylinder and disposed symmetrically with respect to an imaginary central axis passing through the fourth cylinder in the longitudinal direction; and a fourth wing unit; a tidal power generation system comprising a. 6. The method of claim 5,
The turbine unit,
A tidal power generation system comprising a; first turbine part to fourth turbine part sequentially arranged in the first wing part to the fourth wing part in the first direction to the second direction. 7. The method of claim 6,
The first turbine unit to the fourth turbine unit,
The tidal current generation system is disposed in at least one of the front direction or the rear direction of the first wing portion to the fourth wing portion. 7. The method of claim 6,
The first wing portion to the fourth wing portion,
In a first mode of operation, controlled to form an angle in the underwater direction with respect to the horizontal plane,
In the second operating mode, the tidal power generation system is controlled to be parallel to the horizontal plane. 9. The method of claim 8,
The first to fourth turbine units,
When a failure occurs in at least one of the first turbine unit and the fourth turbine unit, the driving of the first turbine unit and the fourth turbine unit is stopped,
When a failure occurs in at least one of the second turbine unit and the third turbine unit, the tidal current generation system in which the driving of the second turbine unit and the third turbine unit is stopped. 6. The method of claim 5,
The first wing portion to the fourth wing portion, including a space therein,
In the first operation mode, by introducing seawater into the inner space of the first wing to the fourth wing, control to form a predetermined angle in the underwater direction with respect to the horizontal plane,
In the second operation mode, the tidal power generation system for controlling the discharging the seawater filled in the inner space of the first wing to the fourth wing to be parallel to the horizontal plane. 10. The method of claim 9,
The power generation system includes a first hydraulic system and a second hydraulic system,
The first hydraulic system and the second hydraulic system,
In the first operation mode, the first to the fourth wing provides a driving force to form a predetermined angle in the underwater direction with respect to the horizontal plane,
In the second operation mode, the tidal current generation system for providing a driving force so that the first to the fourth wing portion is parallel to the horizontal plane. According to claim 1,
A power cable for transmitting the power generated through the power generation system to an external power grid; further comprising,
The power cable is
A tidal power generation system that maintains a predetermined shape within a preset minimum allowable radius. According to claim 1,
The tidal power generation system,
The tidal current system further comprising a; a thrust device for controlling the rotation based on the turntable buoy by following the direction of the current of the sea.

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