WO2023008261A1

WO2023008261A1 - Power generation facility and power generation method

Info

Publication number: WO2023008261A1
Application number: PCT/JP2022/028082
Authority: WO
Inventors: 聡児玉
Original assignee: 三菱重工業株式会社; 三菱パワー株式会社
Priority date: 2021-07-29
Filing date: 2022-07-19
Publication date: 2023-02-02
Also published as: GB2623913A; GB202401022D0; JP2023019429A

Abstract

Provided is a power generation facility that is able to achieve an increase in natural energy power conversion devices efficiently. This power generation facility (1) comprises: a floating body (3) that is moored, and floats on the surface of water; a plurality of power conversion modules (M1) that are provided on the floating body (3), and that convert tidal currents and wave power to power; shared power generation modules (M2) for converting the power derived from each power conversion module (M1) to electricity; and a power transmission module (M3) for transmitting the electricity generated by the power generation modules (M2) to the outside. The floating body (3) is provided with a solar power generation device (9).

Description

Power generation equipment and power generation method

This disclosure relates to power generation facilities and power generation methods that generate power using tidal currents.

Various power generation facilities have been proposed to obtain power from natural energy in the ocean. For example, Patent Literature 1 discloses a hull equipped with photovoltaic power generation equipment, wind power generation equipment, wave power generation equipment, and tidal power generation equipment.

Utility Model Registration No. 3169982

However, in Patent Document 1, a power conversion device that converts wave energy and tidal energy into power is provided. It is not preferable because it causes energy loss in the generator.
Assuming that the number of power converters will increase as power generation equipment becomes larger or scales up, it is necessary to consider an installation form that has a wide range of applications. In particular, unlike the hull that can navigate by itself, such as Patent Document 1, when installing power converters on a floating body moored in the ocean, it is preferable to be able to flexibly cope with an increase or decrease in the number of installations.

The present disclosure has been made in view of such circumstances, and provides a power generation facility and a power generation method that can efficiently increase the number of power conversion devices that convert tidal power and / or wave power into power and maintenance work. intended to provide

A power generation facility according to an aspect of the present disclosure includes a floating body that is moored and floats on a water surface, a plurality of power conversion modules that are provided on the floating body and convert tidal currents and/or wave power into power, and , a common power generation module that converts the motive power led from each power conversion module into electric power, and a power transmission module that transmits the power generated by the power generation module to the outside.

A power generation method according to an aspect of the present disclosure includes a step of converting tidal currents and/or wave power into power by a plurality of power conversion modules provided on a floating body that is moored and floating on the water surface; It includes a step of converting the motive power introduced from the power conversion module into electric power, and a step of transmitting the electric power generated by the power generation module to the outside by a power transmission module.

It is possible to efficiently increase the number of power converters that convert tidal power and/or wave power into power.

1 is a schematic configuration diagram showing power generation equipment according to a first embodiment of the present disclosure; FIG. FIG. 2 is a schematic configuration diagram showing a hydraulic circuit of the tidal current power generation facility of FIG. 1; FIG. 3 is a schematic configuration diagram showing a modification of FIG. 2; FIG. 2 is a schematic configuration diagram showing an air flow of the wave power generation facility of FIG. 1; FIG. 5 is a schematic configuration diagram showing a modification of FIG. 4; FIG. 3 is a plan view showing a state in which a plurality of floating bodies are arranged; It is the bottom view which showed the power generation equipment which concerns on 2nd Embodiment. FIG. 8 is a longitudinal sectional view showing a schematic configuration of the power generation equipment of FIG. 7; FIG. 8 is a bottom view showing a state in which a plurality of floating bodies of FIG. 7 are arranged; FIG. 8 is a bottom view of the floating body of FIG. 7; 10B is a side view of FIG. 10A; FIG. FIG. 4 is a bottom view showing a state in which the floating body is moored with mooring cables having expansion devices.

Embodiments according to the present disclosure will be described below with reference to the drawings.
[First embodiment]
A first embodiment of the present disclosure will be described below.
FIG. 1 shows a power generation facility 1 according to the first embodiment. The power generation facility 1 includes a floating body 3 , a tidal power generation facility 5 , a wave power generation facility 7 , and a solar power generation device 9 .

The floating body 3 has a hollow box shape, for example, a rectangular parallelepiped, and floats on the sea surface WS. The floating body 3 is moored to a fixed point in the sea (not shown) by a mooring cable 11 .

The tidal power generation facility 5 includes a tidal turbine 13 . The tidal current turbine 13 is rotated by the tidal current TS. The rotational force of the tidal current turbine 13 is transmitted from the horizontally extending first shaft 15 to the vertically extending second shaft 17 . For example, two bevel gears 16 are provided between the first shaft 15 and the second shaft 17 . The method is not limited to bevel gears as long as the horizontal rotational force generated by the tidal current turbine 13 can be converted into vertical rotational force. The second shaft 17 is provided so as to pass through the floating body 3 .

A hydraulic pump 19 is connected to the second shaft 17 . The hydraulic pump 19 is provided above the floating body 3, that is, above the sea surface WS. This facilitates access to the hydraulic pump 19 and facilitates maintenance. The hydraulic pump 19 is driven by the rotational force transmitted from the second shaft 17, and the working fluid (working oil) is pressurized to a pressure equal to or higher than a predetermined pressure. Thereby, the tidal current TS is converted into power (hydraulic pressure). Hydraulic oil pressurized by the hydraulic pump 19 is guided to the hydraulic motor 23 through the hydraulic piping 21 .

The tidal current TS reverses (commutates) the flow direction several times a day. A hydraulic circuit 25 is provided as shown in FIG. 2 so that the hydraulic fluid guided to the hydraulic motor 23 flows in one direction even if the tidal current TS is commutated. In FIG. 2 , solid-line arrows indicate the rotation and flow direction of each part when the tidal current turbine 13 rotates forward, and broken-line arrows indicate the rotation and flow direction of the tidal current turbine 13 when the tidal current turbine 13 rotates in the reverse direction. A rotary positive displacement pump such as a gear pump or a screw pump is used as the hydraulic pump 19 . The hydraulic circuit 25 has a diamond-shaped hydraulic bridge circuit 25b, and a check valve 25a is provided on each of the four sides of the hydraulic bridge circuit 25b. By passing the hydraulic oil discharged from the hydraulic pump 19 through the hydraulic bridge circuit 25b, even if the tidal current turbine 13 is reversed, a unidirectional flow is formed from the outward path 30a to the return path 30b via the hydraulic motor 23.
The tidal current turbine 13, the hydraulic pump 19, the hydraulic circuit 25, and the like constitute a power conversion module M1 that converts the tidal current into hydraulic pressure.

When a reciprocating positive displacement pump such as a piston pump, plunger pump, or diaphragm pump is used as the hydraulic pump 19, the configuration shown in FIG. 3 is adopted. Rotation of the second shaft 17 is transmitted to the crank mechanism 27 to reciprocate the piston 29 within the cylinder 28 . Hydraulic oil discharged by a hydraulic pump 19 having a piston 29 is led to a hydraulic motor 23 by forming a unidirectional flow through check valves 31 provided in each of the outward path 30a and the return path 30b.

As shown in FIG. 1, the wave power generation facility 7 includes a wave turbine 33. The wave turbine 33 is rotated by air discharged from the space S1 and sucked into the space S1. The space S<b>1 is formed by an outer shell 35 provided on the side of the floating body 3 . The outer shell 35 is formed such that its upper portion is fixed to the upper portion of the floating body 3 and its lower portion is submerged in water. The lower part of the outer shell 35 is open so that seawater can enter. An opening 35a is formed in the upper portion of the outer shell 35, and air enters and exits the space S1 through the opening 35a.

The rotational force of the wave turbine 33 is transmitted to the horizontally extending third shaft 37 to drive the hydraulic pump 38 . This converts the wave force into power (hydraulic pressure). Hydraulic oil pressurized by the hydraulic pump 38 is guided to the hydraulic motor 23 through the hydraulic piping 39 .

In this embodiment shown in FIG. 1, the wave turbine 33 and the hydraulic pump 38 are provided on both sides of the floating body 3, respectively. The wave power turbine 33, the hydraulic pump 38, and the like constitute a power conversion module M1 that converts wave power into hydraulic pressure.

Each hydraulic pipe 39 of the wave turbine 33 merges with the hydraulic pipe 21 of the tidal current turbine 13 and is led to a common hydraulic motor 23. That is, the hydraulic fluid pressurized by the plurality of power conversion modules M1 is collected and led to the common hydraulic motor 23 .

The volume occupied by the air in the space S1 fluctuates according to the period of the waves, and accordingly the direction of the air entering and exiting the opening 35a is reversed. Therefore, the configuration as shown in FIG. 4 is adopted. As shown in FIG. 4, a solid-line arrow indicates when the sea surface WS rises in the space S1, and a broken-line arrow indicates when the sea surface WS descends.

The wave turbine 33 on the right side in FIG. 4 rotates when the sea surface WS rises and the air in the space S1 is discharged. Specifically, the air discharged from the opening 35a passes through the check valve 40, rotates the wave turbine 33, and is then discharged to the outside. Rotational force of the wave turbine 33 is transmitted to the hydraulic pump 38 via the third shaft 37 . When the sea surface WS descends, the check valve 40 prevents the air from flowing to the wave turbine 33, so that the sea surface WS does not reverse.

The wave turbine 33 on the left side in FIG. 4 rotates when the sea surface WS descends and sucks air into the space S1. Specifically, the outside air flows through the check valve 40 to the wave turbine 33 by sucking air from the opening 35a. This causes the wave turbine 33 to rotate, and the rotational force of the wave turbine 33 is transmitted to the hydraulic pump 38 via the third shaft 37 . When the sea surface WS rises, the check valve 40 prevents air from flowing to the wave turbine 33, so the reverse rotation does not occur.
As described above, hydraulic pressure is generated by one of the wave turbines 33 each time the sea surface WS rises and falls.

As shown in FIG. 5, a configuration using one wave turbine 33 is also possible. A plurality of check valves 42 are used to provide a discharge air path 44a flowing in the discharge direction and a suction air path 44b flowing in the suction direction. A common air path 44c is used for both the discharge air path 44a and the suction air path 44b. By arranging the wave turbine 33 in the common air path 44c, the air always flows through the wave turbine 33 in one direction.

A generator 24 is connected to the hydraulic motor 23 as shown in FIG. The hydraulic motor 23 is rotationally driven by the hydraulic pressure of hydraulic oil supplied from the power conversion module M1, and the rotational force of the hydraulic motor 23 rotationally drives the generator 24 to generate power. The hydraulic motor 23 and the generator 24 constitute a power generation module M2.

The power generated by the generator 24 is sent to the power transmission facility 26 and transmitted to the outside via the power transmission line 26a. The power transmission facility 26 constitutes a power transmission module M3. In the embodiment shown in FIG. 1, the power generation module M2 and the power transmission module M3 are integrated. However, the power generation module M2 and the power transmission module M3 may be provided separately.

The power conversion module M1, power generation module M2, and power transmission module M3 are monitored and controlled by a control unit (not shown). The control unit is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), a computer-readable storage medium, and a wired or wireless communication device. A series of processes for realizing various functions is stored in a storage medium or the like in the form of a program, for example, and the CPU reads out this program to a RAM or the like, and executes information processing and arithmetic processing. As a result, various functions are realized. The program may be pre-installed in a ROM or other storage medium, provided in a state stored in a computer-readable storage medium, or delivered via wired or wireless communication means. may be applied. Computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, semiconductor memories, and the like.

FIG. 6 shows a state in which a plurality of floating bodies 3 are arranged. A plurality of floating bodies 3 are arranged vertically and horizontally in plan view. One floating body 3 is provided with a power generation module M2 and a power transmission module M3 (power generation floating body 3A). A plurality of other floating bodies 3 are provided with power conversion modules M1 (power conversion floating bodies 3B). The power conversion module M1 is not provided in the power generation floating body 3A. The power conversion floating body 3B is not provided with the power generation module M2 and the power transmission module M3.
Therefore, in the configuration shown in FIG. 6, a power generation floating body 3A having common power generation modules M2 and power transmission modules M3 mounted thereon is provided for a plurality of power conversion floating bodies 3B.

Each floating body 3 is connected to each other so that it can be disconnected. Thereby, each floating body 3 can be separated from the other floating bodies 3 .

As shown in FIG. 1, a solar power generation device 9 is provided on the upper portion of the floating body 3. The solar power generation device 9 has a solar cell panel 9a, and a space for installing

hydraulic pumps

19, 38 and the like is formed between the solar cell panel 9a and the floating body 3. As shown in FIG. Electric power generated by the photovoltaic power generation device 9 is sent to the power transmission facility 26 . The power output and the like of the photovoltaic power generation device 9 are controlled by a control unit (not shown).

The effects of the present embodiment described above are as follows.
Since the functions of power conversion, power generation and power transmission are divided into the modules M1, M2 and M3, the power conversion module M1, the power generation module M2 and the power transmission module M3 can be arranged separately. This increases the degree of freedom in combining the modules M1, M2, and M3, and the modules M1, M2, and M3 are arranged according to the installation situation when the power generation facility 1 is enlarged by increasing the number of floating bodies 3. can do.
Since the power generated by the plurality of power conversion modules M1 is led to the common power generation module M2, compared to the case where the power conversion modules M1 are provided with the power generation modules M2 corresponding to each power conversion module M1 one-to-one to generate power, the hydraulic motor 23 and the generator 24 can be increased in capacity, the loss at the time of power conversion can be reduced, and the power generation efficiency can be increased. The number of installed power generation modules M2 can be reduced, and the cost for introduction and maintenance can be reduced. However, considering facility operation during maintenance of the power generation module M2 and the power transmission module M3, a plurality of power generation modules M2 and power transmission modules M3 can be installed.
Since the floating body 3 has a large occupied space and is not equipped with a wind power generator that increases the installation cost, the utilization efficiency of the installation space (the amount of power generated per unit space) is high, and the installation cost can be reduced.

A solar power generation device 9 is provided for the floating body 3. As a result, power can be generated by sunlight in addition to tidal currents and wave power, and the capacity of the power generation equipment 1 can be increased. It is possible to maintain a high facility utilization rate because power generation can be expected from either natural energy regardless of day or night, weather, or season. In particular, tidal currents can be predicted with high accuracy over the long term, making it easier to predict power generation and formulate maintenance plans.

A plurality of power conversion floating bodies 3B each having only the power conversion module M1 provided on the floating body 3 are provided, and power is supplied from each power conversion floating body 3B to the power generation floating body 3A provided with the common power generation module M2 to generate power. . As a result, it is possible to easily cope with the scale-up of the power generation equipment 1 by increasing the power conversion floating bodies 3B. A plurality of common power generation floating bodies 3A can also be provided, and are configured in consideration of the facility scale, reliability, and maintenance plan.

Each floating body 3 can be disconnected from another floating body 3. As a result, power generation as the power generation equipment 1 can be continued after only the specific floating body 3 is disconnected during maintenance or the like.

[Second embodiment]
Next, a second embodiment of the present disclosure will be described. This embodiment differs from the first embodiment in the structure of the floating body 3, but the rest of the configuration is the same. Therefore, in the following description, the differences will be mainly described, and the same reference numerals will be given to the common configurations, and the description thereof will be omitted.

FIG. 7 shows the floating body 3' in plan view. The floating body 3' has floating body parts 50 on both sides. That is, the floating body 3' is of a catamaran type.

Each floating body part 50 has a box shape with a space inside, and is provided along the longitudinal direction. A plurality of partition walls 52 are provided between the left and right floating body portions 50 in the figure. Each partition 52 is a plate-like body and extends so as to connect the left and right floating body portions 50 . Each partition wall 52 is provided at substantially constant intervals in the longitudinal direction at predetermined intervals.

A space S1 is formed by the left and right floating body parts 50 and the partition walls 52 adjacent in the longitudinal direction. The space S1 is used to drive the wave turbine 33 as described in the first embodiment. Therefore, a wave turbine 33 can be provided in each space S1. Although the wave turbines 33 are shown only for two spaces S1 in FIG. 7, the wave turbines 33 may be provided for all the spaces S1.

As shown in FIG. 8, the wave turbine 33 is provided within the space S1. The air in the space S1 enters and leaves the outside through the opening 35a.

A plurality of tidal current turbines 13 are provided for each floating body portion 50 so that the second shaft 17 penetrates through the floating body portion 50 . The number of tidal current turbines 13 is arbitrary and is appropriately set according to the amount of power generation required.

As shown in FIG. 9, a plurality of floating bodies 3' shown in FIG. 7 can be connected and arranged. As shown in FIG. 9, the floating bodies 3' may be arranged in the horizontal direction (width direction), or the floating bodies may be arranged in the vertical direction (longitudinal direction) or the vertical and horizontal directions.

As shown in FIGS. 10A and 10B, a keel (rudder) 54 may be provided at the bottom of each floating body section 50 so as to protrude downward. The tidal current turbine 13 and the wave turbine 33 are omitted in FIGS. 10A and 10B. The keel 54 allows the attitude of the floating body 3' to be adjusted so that the tidal current turbine 13 faces the direction of the tidal current TS.

As shown in FIG. 11, the mooring ropes 11 are used to support the four corners of the floating body 3′ in plan view, and the mooring ropes 11 are supported by reels (expansion devices) 56 provided at the respective mooring points on the floating body 3′. You can stretch it. By controlling each reel 56 by the control unit, the posture of the floating body 3' can be appropriately set according to the direction of the tidal current TS. In this case, compared with the case of using the keel 54, the movement of the floating body 3' can be kept within a narrow range.

The effects of the present embodiment described above are as follows.
A catamaran type floating body is formed by providing floating body portions 50 along the longitudinal direction on both sides of the floating body 3'. A plurality of partition walls 52 extending between the floating body portions 50 are provided in the longitudinal direction. A plurality of spaces S1 in which the volume of the gas phase changes according to changes in waves are formed in the area surrounded by the floating body portion 50 and the partition walls 52 on both sides. Since power can be obtained from wave power using a plurality of spaces S1, greater energy can be recovered from wave power.

Since the floating body 3' is provided with the keel 54, the attitude of the floating body 3' can be appropriately controlled according to the direction of the tidal current TS.

By extending and contracting the mooring cable 11 with the reel 56 according to the tidal current TS, it is possible to give the floating body 3' a posture suitable for the direction of the tidal current TS within a narrow range.

In each of the above-described embodiments, hydraulic pressure has been described as an example of power converted by tidal power and wave power, but the power to be converted is not limited to hydraulic pressure, and other power to be converted, such as air pressure, may be used.

The power generation facilities described in each embodiment described above are understood, for example, as follows.

A power generation facility according to an aspect of the present disclosure includes a floating body that is moored and floats on a water surface, a plurality of power conversion modules that are provided on the floating body and convert tidal currents and/or wave power into power, and each of the power conversion modules a common power generation module that converts the motive power led from the power generation module into power; and a power transmission module that transmits the power generated by the power generation module to the outside.

Since each function such as power conversion, power generation and power transmission is separated for each module, the power conversion module, power generation module and power transmission module can be arranged separately. As a result, the degree of freedom in combination of each module increases, and each module can be arranged according to the installation situation, for example, when increasing the number of floating bodies to increase the scale of the power generation facility.
Since the motive power generated by a plurality of power conversion modules is led to a common power generation module, compared to the case where each power conversion module is provided with a power generation module corresponding one-to-one to generate power, the loss during power conversion is reduced. less, and the power generation efficiency can be increased. The number of installed power generation modules can be reduced, and the cost for introduction and maintenance can be reduced.
The power conversion module has a function of converting power obtained from, for example, tidal currents or wave power into hydraulic pressure.
It is preferable that the floating body is not equipped with a wind power generator that increases the installation cost.

In the power generation facility according to one aspect of the present disclosure, the floating body includes a photovoltaic power generation device.

We decided to install a solar power generation device on the floating body. As a result, power can be generated by sunlight in addition to tidal currents and wave power, and the capacity of power generation facilities can be increased.

In a power generation facility according to an aspect of the present disclosure, a plurality of power conversion floating bodies in which the power conversion modules are provided in the floating bodies, power generated by the power conversion modules is guided from each of the power conversion floating bodies, and the and a power generation floating body in which a power generation module is provided on the floating body.

A plurality of power conversion floating bodies are provided, and power is supplied from each power conversion floating body to a common power generation floating body to generate power. As a result, it is possible to easily cope with the scale-up of power generation facilities by increasing the number of power conversion floating bodies.
A plurality of power generation floating bodies may be provided. The power generation floating body may be used as a power generation and transmission floating body by providing a power transmission module.

In the power generation facility according to one aspect of the present disclosure, the power conversion floating body and the power generation floating body are connected so as to be able to be disconnected from the other floating body.

By making it possible to disconnect from other floating bodies, it is possible to continue power generation as a power generation facility after disconnecting only a specific floating body during maintenance.

In the power generation facility according to an aspect of the present disclosure, the floating body includes floating body portions provided along the longitudinal direction on both sides, and a plurality of partition walls extending between the floating body portions and provided in the longitudinal direction. and obtaining power from wave force using a plurality of spaces surrounded by each of the floating body portions and each of the bulkheads.

A catamaran type floating body is formed by providing a floating body part along the longitudinal direction on each side. A plurality of partition walls extending between the floating body portions are provided in the longitudinal direction. A plurality of spaces whose volumes change according to changes in waves are formed in the areas surrounded by the floating bodies on both sides and the partition walls. Because multiple spaces can be used to derive power from the wave force, more energy can be recovered from the wave force.

In the power generation facility according to one aspect of the present disclosure, the floating body includes a keel.

We decided to install a keel on the floating body. Thereby, the posture of the floating body can be appropriately controlled according to the direction of the tide.

A power generation facility according to an aspect of the present disclosure includes a mooring cable for mooring the floating body, an expansion/contraction device for expanding and contracting the mooring cable, and a control unit for controlling the expansion/contraction device in accordance with tidal currents.

By expanding and contracting the mooring cable according to the tidal current, it is possible to give the floating body a suitable posture within a narrow range against the tidal current.

A power generation method according to an aspect of the present disclosure includes a step of converting tidal currents and/or wave power into power by a plurality of power conversion modules provided on a floating body that is moored and floating on the water surface; It has a step of converting the motive power led from the power conversion module into electric power, and a step of transmitting the electric power generated by the power generation module to the outside by a power transmission module.

1 power generation equipment 3, 3' floating body 3A power generation floating body 3B power conversion floating body 5 tidal power generation equipment 7 wave power generation equipment 9 photovoltaic power generation device 9a solar cell panel 11 mooring rope 13 tidal current turbine 15 first shaft 16 bevel gear 17 2 shafts 19 Hydraulic pump 21 Hydraulic piping 23 Hydraulic motor 24 Generator 25 Hydraulic circuit 25a Check valve 25b Hydraulic bridge circuit 26 Power transmission equipment 27 Crank mechanism 28 Cylinder 29 Piston

30a Forward path

30b Return path 31 Check valve 33 Wave turbine 35 Hull 35a opening 37 third shaft 38 hydraulic pump 39 hydraulic piping 40 check valve 42 check valve 44a discharge air path 44b suction air path 44c common air path 50 floating body portion 52 partition wall 54 keel (rudder)
56 reel (extension device)
M1 power conversion module M2 power generation module M3 power transmission module S1 space TS tidal current WS sea surface

Claims

a floating body that is moored and floats on the surface of the water;
a plurality of power conversion modules provided on the floating body for converting tidal currents and/or wave power into power;
a common power generation module that converts power guided from each of the power conversion modules into electric power;
a power transmission module that transmits power generated by the power generation module to the outside;
A power generation facility equipped with
The power generation facility according to claim 1, wherein the floating body is equipped with a solar power generation device.
a plurality of power conversion floating bodies each having the power conversion module provided on the floating body;
a power generation floating body in which power generated by the power conversion module is guided from each of the power conversion floating bodies, and the power generation module is provided on the floating body;
The power generation facility according to claim 1 or 2, comprising:
The power generation facility according to claim 3, wherein the power conversion floating body and the power generation floating body are connected so as to be able to be disconnected from the other floating body.
The floating body includes floating body sections provided along the longitudinal direction on both sides, and a plurality of partition walls extending between the floating body sections and provided in the longitudinal direction,
The power generation facility according to any one of claims 1 to 4, wherein power is obtained from wave force using a plurality of spaces surrounded by each of the floating body portions and each of the partition walls.
The power generation facility according to any one of claims 1 to 5, wherein the floating body has a keel.
a mooring cable for mooring the floating body;
An expansion device for expanding and contracting the mooring cable;
a control unit that controls the expansion and contraction device according to the tide;
The power generation facility according to any one of claims 1 to 6, comprising:
a step of converting tidal currents and/or wave power into power by a plurality of power conversion modules provided on a floating body that is moored and floats on the water surface;
converting power derived from each power conversion module into electric power by a common power generation module;
a step of transmitting the power generated by the power generation module to the outside by a power transmission module;
A power generation method comprising: