JP7139903B2 - Subsea floating type ocean current power generation device and subsea floating type ocean current power generation system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a subsea floating type ocean current power generation device and a subsea floating type ocean current power generation system.

A technique related to underwater floating type ocean current power generation is known, in which a turbine-equipped generator is made to float in the sea, and the generator generates electricity by means of an ocean current in the sea. For example, Patent Literature 1 discloses an underwater floating type ocean current power generator that is set to either a power generation state or a power generation suspended state based on an external command. The subsea floating type ocean current power generation device of Patent Document 1 includes a body having a ballast tank inside, a generator having a turbine that rotates in response to the ocean current, and an elevating mechanism that moves the generator up and down with respect to the body. . When shifting from the power generation suspension state to the power generation state, the elevator mechanism moves the generator to the power generation position below the main body, and fills the ballast tank with water until the main body reaches a predetermined depth. At the time of transition from the power generation state to the power generation suspension state, the lift mechanism moves the generator to the power generation suspension position above the main body, drains the ballast tank, and floats the main body.

Japanese Patent No. 6093839

By the way, even within an area where there is an ocean current, the current velocity varies depending on the location or season, and the current velocity distribution also occurs in the depth direction. . Therefore, it is desired to obtain more stable electric power.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a subsea floating type ocean current power generation device and a subsea floating type ocean current power generation system that can obtain more stable electric power.

One aspect of the present invention is a power generation unit that is suspended in the sea and generates power using the ocean current in the sea, an ultrasonic current meter that measures the current velocity at each position in the sea, and an ultrasonic current meter that measures the current velocity. and a position control section for controlling the position of the power generation section in the sea based on the current velocity.

According to this configuration, in the subsea floating type ocean current power generation device provided with the power generation unit that is suspended in the sea and generates power using the ocean current in the sea, the velocity of the ocean current at each position in the sea is measured by the ultrasonic current meter, Since the position control section controls the position of the power generation section in the sea based on the current velocity measured by the ultrasonic current meter, the power generation section can be easily positioned in the sea at a desired current velocity. Therefore, the generated power is less likely to be affected by fluctuations in flow velocity, and more stable power can be obtained.

In this case, the position control unit can move the power generation unit to a position in the sea where the electric power generated by the power generation unit increases based on the flow velocity measured by the ultrasonic current meter.

According to this configuration, the position control unit moves the power generation unit to a position in the sea where the power generated by the power generation unit increases based on the flow velocity measured by the ultrasonic current meter, so that greater power can be obtained. can be done.

Further, the position control unit determines the amount of power generated by the power generation unit, which increases by moving the power generation unit, by subtracting the amount of power consumed by moving the power generation unit. position can be controlled.

According to this configuration, the position control unit determines the amount of power generated by the power generation unit by subtracting the amount of power consumed by moving the power generation unit from the amount of power generated by the power generation unit, which increases when the power generation unit is moved. Because the position in the sea is controlled, a larger and more stable amount of power can be obtained.

In addition, the ultrasonic anemometer can measure current velocities at positions in the sea above and below the power generation unit.

According to this configuration, the ultrasonic current meter measures the current velocity at positions in the sea above and below the power generation unit, so it is possible to obtain the distribution of the current velocity in the depth direction in the sea, which is important for power generation. , the stability of power generation can be further improved.

In addition, two ultrasonic current meters are provided in the power generation unit, one ultrasonic current meter measures the flow velocity at a position in the sea diagonally above one side of the power generation unit, and the other ultrasonic current meter The current meter can measure the current velocity at a position in the sea diagonally below the other side of the power generation section.

According to this configuration, two ultrasonic current meters provided in the power generation unit are provided, and one of the ultrasonic current meters measures the flow velocity at a position in the sea diagonally above one side of the power generation unit, The other ultrasonic current meter measures the current velocity at the position in the sea diagonally below the other side of the power generation section. From the velocity at the position in the sea diagonally above on one side, it is also possible to infer the velocity of the upper part on one side, the lower part on one side and the upper part on the other side. . From the velocity at the position in the sea obliquely downward on the other side, it is also possible to infer the velocity of the bottom on the other side, part of the top on the other side and part of the bottom on one side. . Therefore, with a minimum number of ultrasonic anemometers provided in the power generation section, it is possible to acquire the flow velocity distribution in all directions above, below, and to the left and right sides of the power generation section.

In addition, a mooring part that is arranged on the seabed and mooring the power generation part may be further provided, and the ultrasonic anemometer may be provided in the mooring part.

According to this configuration, since the ultrasonic current meter is provided in the mooring section that is arranged on the seabed and mooring the power generation section, the current velocity of the ocean current reaching the power generation section can be measured in advance, and the current velocity can be predicted. It is easy to stand up, and it becomes easier to control the position of the power generation unit by the position control unit.

Moreover, it is possible to further include a pitch control section for controlling the pitch of the turbine for causing the power generation section to generate power by being rotated by the ocean current, based on the flow velocity measured by the ultrasonic current meter.

According to this configuration, the pitch control unit controls the pitch of the turbine for causing the power generation unit to generate power by being rotated by the ocean current based on the flow velocity measured by the ultrasonic anemometer. power can be obtained.

On the other hand, another aspect of the present invention is a subsea floating type ocean current power generation system including a plurality of the above subsea floating type ocean current power generation devices of the present invention.

According to this configuration, since the subsea floating type ocean current power generation system includes a plurality of the subsea floating type ocean current power generation devices of the present invention, it is possible to stably obtain larger electric power. In addition, it is possible to obtain more stable electric power by having each of the underwater floating type ocean current generators share information on the velocity of the ocean current with each other.

According to the subsea floating type ocean current power generation device of one aspect of the present invention and the subsea floating type ocean current power generation system of the other aspect of the present invention, more stable electric power can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the subsea floating type ocean current power generation apparatus which concerns on 1st Embodiment. It is a block diagram which shows the floating body of the underwater floating type ocean current power generation apparatus which concerns on 1st Embodiment. (A) is a diagram showing the ultrasonic anemometer of the left pod according to the first embodiment, and (B) is a diagram showing the measurement directions in all directions, up, down, left and right, of the ultrasonic anemometer according to the first embodiment. be. 4 is a flow chart showing the operation of the subsea floating type ocean current power generator according to the first embodiment. (A), (B), (C), (D) and (E) are diagrams showing various possible patterns of depth in the sea and current velocity. (A), (B) and (C) are diagrams showing the operation of the floating body of the subsea floating type ocean current power generation device according to the first embodiment. It is a figure which shows the loss which arises in an underwater floating type ocean current power generation device. (A) is a diagram showing the ultrasonic current meter of the left pod according to the second embodiment, and (B) is a diagram showing the measurement directions in all directions, up, down, left and right, of the ultrasonic current meter according to the second embodiment. be. It is a perspective view which shows the underwater floating type ocean current power generation apparatus which concerns on 3rd Embodiment. It is a perspective view which shows the subsea floating type ocean current power generation system which concerns on 4th Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the terms "upstream" or "downstream" are used with reference to ocean current flow. The term "before" means upstream of the current flow and the term "after" means downstream of the current flow. The term "side" means a direction perpendicular to and horizontal to the current flow. The terms "right" or "left" refer to directions perpendicular to and horizontal to the current flow and are used with reference to the rear or downstream side. The terms "upper" and "lower" are used with reference to the vertical direction when the floating body is in a stable state in the sea, which will be described later.

As shown in FIG. 1, an underwater floating type ocean current power generator 1A according to the first embodiment of the present invention includes a floating body 100A and mooring portions 200A. 100 A of floating bodies are made to float in the sea W, and generate electric power by the current of the sea W. 200 A of mooring parts are arrange|positioned at the seabed B, and mooring the floating body 100A with the mooring line 201. As shown in FIG. Electric power obtained by the power generation is sent to an external electric power system by, for example, mooring ropes 201 and cables (not shown) along the seabed B.

As shown in FIGS. 1 and 2, the floating body 100A includes a central pod 101, a left pod 102, a right pod 103, a turbine 104, an ultrasonic anemometer 105, a connecting portion 106, a power generation portion 111, a position control portion 112, a buoyancy It has an adjustment device 113 , an attitude control device 114 , a pitch control section 115 , a depth gauge 116 and a communication control section 117 . The total length and width of the floating body 100A are, for example, 10m to 100m.

The central pod 101, the left pod 102 and the right pod 103 are cylindrical containers with internal spaces. The center pod 101 is arranged between the left pod 102 and the right pod 103 in the left-right direction and above the left pod 102 and the right pod 103 . The left pod 102 and right pod 103 have, for example, the same structure. The central pod 101, the left pod 102 and the right pod 103 are arranged such that their longitudinal central axes are substantially parallel to each other. The central pod 101 , the left pod 102 and the right pod 103 are connected to each other by a connecting portion 106 .

The left pod 102 and the right pod 103 are provided with power generation units 111 . The power generation unit 111 is made to float in the sea W together with the floating body 100A, and generates power by the ocean current in the sea W. Each of the power generation units 111 generates electric power by rotating the turbines 104 arranged in each of the left pod 102 and the right pod 103 . That is, the subsea floating type ocean current power generation device 1A of this embodiment is a twin-engine type ocean current power generation device. The power generation unit 111 has a speed increaser (not shown) that increases the rotation speed of the generator with respect to the rotation speed of the turbine 104 . The power generated by each power generation unit 111 is, for example, 1000 kW. Also, for example, two turbines 104 are located behind the left pod 102 and the right pod 103 . That is, the downwind turbine is adopted in the floating body 100A. Further, in order to cancel the torque due to each other's rotation, the respective turbines 104 of the left pod 102 and the right pod 103 have opposite pitches and rotate in opposite directions upon receiving the ocean current.

Left pod 102 and right pod 103 are equipped with ultrasonic anemometers 105 . The ultrasonic anemometer 105 measures the velocity of the ocean current at each position in the sea W. The ultrasonic current meter 105 is a current meter that utilizes the Doppler effect of ultrasonic waves. In the ultrasonic current meter 105, the sound waves emitted from the ultrasonic current meter 105 are reflected by suspended solids in the sea W, and the returning sound undergoes a change in frequency (Doppler shift), which is proportional to the current velocity. It measures the velocity of ocean currents by using the fact that

In this embodiment, each of the left pod 102 and the right pod 103 includes four ultrasonic anemometers 105, as shown in FIGS. 3A and 3B. Each of the four ultrasonic anemometers 105 measures the current velocity of the ocean current at positions W above the left pod 102 and the right pod 103 , D below D, L and R on the left and right of the pod 103 . As a result, it is possible to acquire the distribution of the flow velocity in all directions above U, below D, and on the left and right sides of the power generation section 111 of the floating body 100A.

As shown in FIG. 2, central pod 101 includes position control 112 . The position control unit 112 controls the position of the power generation unit 111 in the sea W based on the flow velocity measured by the ultrasonic current meter 105 . The central pod 101 is equipped with a buoyancy adjustment device 113 . The buoyancy adjustment device 113 adjusts the buoyancy applied to the floating body 100A by pouring seawater into and out of the ballast tanks built in the central pod 101 . Each of the left pod 102 and the right pod 103 has an attitude control device 114 . The attitude control device 114 controls the attitude of the floating body 100A in the sea W by ballast tanks and thrusters arranged in the left pod 102 and the right pod 103 . The position control unit 112 controls the position of the power generation unit 111 in the sea W by controlling the operations of the buoyancy adjustment device 113 and the attitude control device 114 .

As will be described later, the position control unit 112 moves the power generation unit 111 together with the floating body 100A to a position in the sea W where the electric power generated by the power generation unit 111 of the floating body 100A increases based on the flow velocity measured by the ultrasonic current meter 105. move. More specifically, the position control unit 112 determines the amount of power consumed by moving the power generation unit 111 together with the floating body 100A from the amount of power generated by the power generation unit 111 that increases as the power generation unit 111 moves together with the floating body 100A. is subtracted, the position of the power generation unit 111 in the sea W is controlled.

The central pod 101 has a pitch control 115 . The pitch control unit 115 controls the pitch of the turbine 104 for causing the power generation unit 111 to generate power by being rotated by the ocean current based on the flow velocity measured by the ultrasonic current meter 105 . The central pod 101 also has a communication control unit 116 . The depth gauge 116 measures the depth of the power generation section 111 of the floating body 100A. The communication control unit 117 receives information on the current velocity at each position in the sea W measured by the ultrasonic current meter 105 via the mooring cable 201 and a cable (not shown) along the seabed B, Information about the generated power, information about the state of the floating body 100A, and the like are transmitted to the outside. The communication control unit 117 also receives command signals for controlling the operation of the floating body 100A from the outside.

The operation of the subsea floating type ocean current power generation device 1A according to this embodiment will be described below. An anchor 200A is placed on the seabed B, as shown in FIG. 100 A of floating bodies moored by 200 A of mooring parts are made to float in the sea W. FIG. As shown in FIG. 4, the ultrasonic current meter 105 of the subsea floating type ocean current generator 1A starts measuring the velocity of the ocean current at each position in the sea W (S1). The position control unit 112 of the underwater floating type ocean current power generation device 1A analyzes the ocean current velocity at each position in the sea W based on the current velocity measured by the ultrasonic current meter 105 (S2). The velocity of the ocean current at each position in the sea W is recorded as data associated with the position of the floating body 100A such as the depth of the power generation section 111 of the floating body 100A measured by the depth gauge 116 . The communication control unit 117 transmits the data to the outside.

As shown in FIGS. 5(A), 5(B), 5(C), 5(D) and 5(E), there are various patterns of the depth of the sea W and the velocity of the ocean current. . For example, as shown in FIG. 6A, due to changes in the state of the ocean current F in the sea W, the velocity of the ocean current F around the floating body 100A suspended in the sea W between the sea surface S and the seabed B is low. , the case where the velocity of the ocean current F at a position deeper than the position of the floating body 100A is high. The position control unit 112 evaluates the current velocity data at each position in the sea (S3).

The position control unit 112 determines that the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit 111 from the amount of power generated by the power generation unit 111, which increases as the power generation unit 111 is moved, is greater than a predetermined threshold. It is determined whether or not (S4). For example, when the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit 111 from the amount of power generated by the power generation unit 111, which increases by moving the power generation unit 111, is equal to or less than a predetermined positive threshold. Then, the position control unit 112 maintains the position in the sea W of the power generation unit 111 of the floating body 100A.

On the other hand, the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit 111 from the amount of power generated by the power generation unit 111, which increases by moving the power generation unit 111, exceeds a predetermined positive threshold. In this case, as shown in FIGS. 2, 6B, and 6C, the position control unit 112 moves the position in the sea W of the power generation unit 111 of the floating body 100A to the target position T ( S5). The position control unit 112 transmits a command signal to the buoyancy adjustment device 113 to control the buoyancy of the floating body 100A. Also, the position control unit 112 transmits a command signal to the attitude control device 114 to control the attitude of the floating body 100A. The position control unit 112 also transmits a command signal to the pitch control unit 115 to change the pitch of the turbine 104 to a pitch suitable for movement of the floating body 100A.

The position control unit 112 controls operations of the buoyancy adjustment device 113, the attitude control device 114, and the pitch control unit 115 based on the flow velocity of the ocean current F along the route from the current position of the floating body 100A to the target position T. For example, when there is a region where the velocity of the ocean current F is low and it is difficult to submerge the floating body 100A on the route to the target position T, which is deeper than the current position of the floating body 100A, the position control unit 112 instructs the buoyancy adjustment device 113 to A command signal is sent to increase the amount of water to be injected into the ballast tank. On the other hand, if there is a region where the floating body 100A is too submerged due to a rapid increase in the velocity of the ocean current F on the route to the target position T, which is deeper than the current position of the floating body 100A, the position control unit 112 controls the buoyancy adjustment device 113. Send a command signal to reduce the amount of water injected into the ballast tank.

As shown in FIGS. 2 and 6C, after the position of the power generation section 111 of the floating body 100A reaches the target position T, the position control section 112 transmits a command signal to the pitch control section 115, and the power generation section The pitch of the turbine 104 is changed to the pitch that maximizes the power generated by 111 (S6). The position control unit 112 moves the power generation unit 111 at the target position T based on the flow velocity of the ocean current F at each position in the sea W measured by the ultrasonic current meter 105. It is determined whether or not the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit 111 from the amount of power generated is greater than a predetermined threshold (S7).

For example, when the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit 111 from the amount of power generated by the power generation unit 111, which increases by moving the power generation unit 111, is equal to or less than a predetermined positive threshold. Then, the position control unit 112 maintains the position in the sea W of the power generation unit 111 of the floating body 100A (S8). On the other hand, the amount of power consumed by moving the power generation unit 111 is calculated from the amount of power generated by the power generation unit 111 that increases due to the movement of the power generation unit 111 due to changes in the state of the ocean current F in the sea W due to the tide or the like. If the subtracted power amount exceeds the predetermined positive threshold value, the position control unit 112 performs the above operations of S3 to S7.

According to this embodiment, in the subsea floating type ocean current power generation device 1A provided with the power generating unit 111 that is suspended in the sea W and generates power by the ocean current F in the sea W, the ultrasonic current meter 105 detects the current at each position in the sea W. The current velocity of the ocean current F is measured, and the position of the power generation unit 111 in the sea W is controlled by the position control unit 112 based on the current velocity measured by the ultrasonic current meter 105. It becomes easier to position the part 111 . Therefore, the generated power is less likely to be affected by fluctuations in flow velocity, and more stable power can be obtained.

Further, according to the present embodiment, the position control unit 112 moves the power generation unit 111 to a position in the sea W where the electric power generated by the power generation unit 111 increases based on the flow velocity measured by the ultrasonic current meter 105. Therefore, more power can be obtained.

Further, according to the present embodiment, the position control unit 112 subtracts the amount of power consumed by moving the power generation unit 111 from the amount of power generated by the power generation unit 111 that increases as the power generation unit 111 is moved. Since the position of the power generation unit 111 in the sea W is controlled based on the amount of power, a larger and more stable amount of power can be obtained.

Further, according to the present embodiment, the ultrasonic current meter 105 measures the current velocity at the positions in the sea W above and below the power generation unit 111, so the distribution of the current velocity in the depth direction in the sea, which is important for power generation can be obtained, and the stability of the power generation amount can be further improved. In other words, not only the downward direction of the power generation unit 111 but also the upward direction flow velocity can be measured, and an accurate distribution of the flow velocity in the depth direction in the sea can be obtained, and the stability of the power generation amount can be further improved. .

Further, according to the present embodiment, the pitch control unit 115 controls the pitch of the turbine 104 for causing the power generation unit 111 to generate power by being rotated by the ocean current based on the flow velocity measured by the ultrasonic current meter 105. Therefore, power can be obtained more efficiently.

As shown in FIG. 7, in the subsea floating type ocean current power generation device 1A, the energy of the ocean current F causes a loss due to the turbine, a loss due to the speed increaser, and a loss due to the generator. In FIG. 7, T' is the torque of the gearbox, n' is the rotation speed of the gearbox, Kg is the gear ratio of the gearbox, and I is the current generated by the generator. and V is the voltage generated by the generator. Since it is impossible to reduce these losses to 0, it is impossible to increase power generation without increasing the energy of ocean current F. In this embodiment, the position of the power generation unit 111 in the sea W is controlled to the position where the amount of power generated is maximized based on the flow velocity measured by the ultrasonic current meter 105 by the position control unit 112. You can always maximize your power consumption. Therefore, the power generation unit 111 can be installed at an optimum position, and power can be generated efficiently. Also, since the pitch of the turbine 104 is optimally controlled, losses due to the turbine can be reduced.

In the conventional subsea floating type ocean current generator, there is a possibility that the floating body 100A will float when the flow velocity becomes extremely slow. In addition, with the conventional subsea floating type ocean current generator, there is a possibility that it will not be possible to dive deeper from a region where the current velocity is extremely slow. On the other hand, in this embodiment, the position of the floating body 100A is controlled by the position control unit 112 based on the flow velocity measured by the ultrasonic anemometer 105. Floating can be prevented.

In addition, since information on the flow velocity on the movement path of the floating body 100A can be obtained, depth control of the floating body 100A is facilitated. If there is a region where the flow velocity is close to 0 on the diving route of the floating body 100A, there is a possibility that the floating body 100A cannot dive. However, according to this embodiment, countermeasures such as increasing the amount of water injected into the ballast tank to the buoyancy adjustment device 113 more than usual can be taken in advance. On the other hand, if there is a region where the current velocity increases rapidly on the submersion route of the floating body 100A, there is a possibility that the floating body 100A will submerge too much. According to the present embodiment, even if there is a region where the flow speed rapidly increases on the submergence route of the floating body 100A, countermeasures such as reducing the amount of water injected into the ballast tank to the buoyancy adjustment device 113 can be taken. Furthermore, according to the present embodiment, the ultrasonic anemometer 105 can measure the flow velocity around the blades of the turbine 104, and fluctuations in power generated by the power generation unit 111 can be controlled. Further, according to the present embodiment, the absolute depth from the sea surface S and the current velocity can be associated and recorded by taking into consideration the information on the depth of the power generating section 111 of the floating body 100A obtained by the depth gauge 116 .

A second embodiment of the present invention will be described below. As shown in FIGS. 8A and 8B, in the floating body 100B of the subsea floating type ocean current power generation device 1B of this embodiment, the left pod 102 and the right pod 103 that accommodate the power generation unit 111 are provided with One ultrasonic current meter 105 measures the current velocity at a position in the sea W diagonally above one side of the power generation unit 111, and the other ultrasonic current meter 105 measures the flow velocity at the position in the sea W obliquely below the other side of the power generation unit 111 . In the examples of FIGS. 8A and 8B, one ultrasonic current meter 105 measures the current velocity at a position in the sea W in the oblique upper left LU of the power generation unit 111, and the other ultrasonic current meter 105 measures the flow velocity at a position in the sea W diagonally below the diagonally lower right RD of the power generation unit 111 .

According to this embodiment, two ultrasonic current meters 105 provided in the power generation unit 111 are provided. is measured, and the other ultrasonic current meter 105 measures the flow velocity at a position in the sea W diagonally below the other side of the power generation unit 111 . From the velocity at the position in the sea W obliquely upward on one side, it is also possible to infer the velocity of the upper part on one side, part of the lower part on one side and part of the upper part on the other side. can. From the velocity at the position of the sea W obliquely downward on the other side, it is also possible to infer the velocity of the bottom on the other side, part of the top on the other side, and part of the bottom on one side. can. Therefore, the minimum number of ultrasonic anemometers 105 provided in the power generation section can acquire the flow velocity distribution in all directions above, below, and to the left and right sides of the power generation section 111 .

A third embodiment of the present invention will be described below. As shown in FIG. 9, the subsea floating type ocean current power generation device 1C of this embodiment is arranged on the seabed B and includes a mooring section 200B for mooring the power generation section 111 of the floating body 100A. The ultrasonic current meter 105 is also provided in the mooring section 200B in addition to the floating body 100A. In addition, the ultrasonic current meter 105 may be provided only in the mooring part 200B.

According to this embodiment, since the ultrasonic current meter 105 is provided in the mooring section 200B that is arranged on the seabed B and mooring the power generation section 111, the velocity of the ocean current that reaches the power generation section 111 can be measured in advance. This makes it easier to predict the flow velocity, making it easier for the position control section 112 to control the position of the power generation section 111 .

A fourth embodiment of the present invention will be described below. As shown in FIG. 10, the subsea floating type ocean current power generation system 300 of this embodiment includes a plurality of subsea floating type ocean current power generation devices 1C. Mooring portions 200B are arranged at different positions on the seabed B, and a floating body 100A is moored to each of the mooring portions 200B. The current velocity at each position in the sea W measured by the ultrasonic current meter 105 of the mooring part 200B is transmitted to the outside and other floating bodies 100A via cables (not shown) along the seabed B. In addition, the velocity of the ocean current at each position in the sea W measured by the ultrasonic current meter 105 of the floating body 100A is transmitted by the communication control unit 117 to the external and other floating bodies 100A.

Each position control unit 112 of the floating body 100A, in addition to the current velocity of the ocean current at each position in the sea W measured by its own ultrasonic current meter 105, measures the ultrasonic current velocity of the other floating body 100C and the mooring part 200B. The position of the floating body 100A is controlled based on the velocity of the ocean current at each position in the sea W measured by 105. The mooring part 200A may be arranged instead of the mooring part 200B, and the floating body 100B may be arranged instead of the floating body 100A.

According to this embodiment, since the subsea floating type ocean current power generation system 300 includes a plurality of the subsea floating type ocean current power generation devices 1C of the present invention, it is possible to obtain stable and larger electric power. In addition, it is also possible to obtain more stable electric power by sharing the information on the velocity of the ocean current in the sea W between each of the underwater floating type ocean current generators 1C.

Although the embodiments and modifications of the present invention have been described above, the present invention is not limited to the above embodiments.

1A, 1B, 1C Subsea Floating Current Power Generation Devices 100A, 100B Floating Body 101 Central Pod 102 Left Pod 103 Right Pod 104 Turbine 105 Ultrasonic Anemometer 106 Connection Part 111 Power Generation Part 112 Position Control Part 113 Buoyancy Adjustment Device 114 Attitude Control Device 115 Pitch control unit 116 Depth gauge 117 Communication control unit 200A, 200B Mooring unit 201 Mooring rope 300 Undersea floating type ocean current power generation system U Upward D Downward L Left R Right LU Diagonal upper left RD Diagonal lower right S Sea surface B Seabed W Undersea F Current T Target position

Claims (6)

a power generation unit that is suspended in the sea and generates power using the current in the sea;
an ultrasonic current meter that measures the velocity of the ocean current at each position in the sea;
a position control unit that controls the position of the power generation unit in the sea based on the flow velocity measured by the ultrasonic current meter ;
The position control unit
moving the power generation unit to a position in the sea where power generated by the power generation unit increases based on the flow velocity measured by the ultrasonic current meter ;
The position of the power generation unit in the sea based on the amount of power obtained by subtracting the amount of power consumed by moving the power generation unit from the amount of power generated by the power generation unit that increases by moving the power generation unit. An underwater floating type ocean current generator that controls 2. The subsea floating type ocean current power generation device according to claim 1 , wherein said ultrasonic anemometer measures said current velocity at said positions in the sea above and below said power generation unit. a power generation unit that is suspended in the sea and generates power using the current in the sea;
two ultrasonic current meters provided in the power generation unit for measuring the current velocity of the ocean current at each position in the sea;
a position control unit that controls the position of the power generation unit in the sea based on the flow velocity measured by the ultrasonic current meter ;
One of the ultrasonic anemometers measures the flow velocity at a position in the sea diagonally above one side of the power generation unit,
The other ultrasonic current meter measures the current velocity at the position in the sea obliquely below the other side of the power generation unit. further comprising a mooring portion arranged on the seabed for mooring the power generation portion;
The subsea floating type ocean current power generator according to any one of claims 1 to 3 , wherein the ultrasonic current meter is provided in the mooring section. Claims 1 to 4 , further comprising a pitch control unit that controls the pitch of the turbine for causing the power generation unit to generate power by being rotated by the ocean current based on the flow velocity measured by the ultrasonic current meter. The subsea floating type ocean current power generation device according to any one of 1. a power generation unit that is suspended in the sea and generates power using the current in the sea;
an ultrasonic current meter that measures the velocity of the ocean current at each position in the sea;
A plurality of subsea floating type ocean current power generation devices comprising a position control unit that controls the position of the power generation unit in the sea based on the flow velocity measured by the ultrasonic current meter ,
The position control unit of each of the plurality of floating ocean current power generating devices controls the current velocity at each position in the sea measured by its own ultrasonic current meter and the other floating ocean current power generating devices. and the current velocity at each position in the sea measured by the ultrasonic current meter of and the position of the power generation unit in the sea.

Images