JP7230702B2 - Subsea floating type ocean current generator - Google Patents

Description

The present invention relates to an underwater floating type ocean current generator.

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 floating body having a ballast tank inside, a generator having a turbine that rotates in response to the ocean current, and an elevating mechanism that raises and lowers the generator with respect to the floating body.

At the time of transition from the power generation suspension state to the power generation state, the generator is moved to the power generation position below the floating body by the lifting mechanism according to the command signal received from the command center on the ground via the communication cable, and the floating body is set in advance. Ballast tanks are filled to the specified depth. At the time of transition from the power generation state to the power generation suspension state, the generator is moved to the power generation suspension position above the floating body by the command signal received from the command center on the ground via the communication cable, and the ballast tank is lifted. The water is drained and the floating body is floated.

The underwater floating type ocean current power generation device of Patent Document 1 includes a storage battery and a power transmission control unit. The storage battery stores part of the power generated by the generator in the power generation state. The power transmission control unit not only transmits the power generated by the generator, but also uses the power stored in the storage battery when transitioning from the power generation state to the power generation suspension state and from the power generation suspension state to the power generation state. The turbine is braked by rotating the generator in the direction opposite to that during power generation.

Japanese Patent No. 6093839

By the way, with the above technology, if the power supply to the floating body from the outside of the floating body is lost, it becomes impossible to fill and drain the ballast tanks, for example, emergency water discharge cannot be performed, and there is a possibility that the floating body will not be able to float stably. There is

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a subsea floating type ocean current generator that can control the position of a floating body in the sea by using the electric power of a storage battery even when the power supply to the floating body from the outside of the floating body is lost. aim.

One aspect of the present invention includes a floating body that floats in the sea, a power generation unit that is integrated with the floating body and generates power using an ocean current in the sea, a position control unit that is integrated with the floating body and controls the position of the floating body in the sea, It is an underwater floating type ocean current power generation device that is integrated with a floating body and includes a storage battery that supplies electric power to a position control section.

According to this configuration, a floating body that is made to float in the sea, a power generation unit that is integrated with the floating body and generates power using an ocean current in the sea, and a position control section that is integrated with the floating body and controls the position of the floating body in the sea. In the subsea floating type ocean current power generation device, since power is supplied to the position control unit by the storage battery integrated with the floating body, even if the power supply to the floating body from the outside of the floating body is lost, can control the position of the floating body in the sea.

In this case, a storage battery control unit that controls charging and discharging of the storage battery is further provided, and the storage battery control unit causes the position control unit to supply power to the storage battery when power supply to the floating body from the outside of the floating body is lost. be able to.

According to this configuration, when the power supply to the floating body from the outside of the floating body is lost by the storage battery control section that controls charging and discharging of the storage battery, power is supplied from the storage battery to the position control section. Even if the power supply to the floating body from the outside is lost, the power of the storage battery can control the position of the floating body in the sea.

In this case, the storage battery control unit supplies the power generated by the power generation unit to the storage battery when power supply from the outside of the floating body to the floating body is lost and when the transmission line for the power generated by the power generation unit to the outside of the floating body is disconnected. can be charged.

According to this configuration, the storage battery control unit allows the power generation unit to supply power to the storage battery when power supply from the outside of the floating body to the floating body is lost and when the power transmission line for power generated by the power generation unit to the outside of the floating body is broken. Since the generated power is charged, the storage battery functions as a regenerative brake by absorbing the surplus power of the power generation unit when power generation is stopped in an emergency, and the regenerated energy can be stored in the storage battery.

Further, the storage battery control unit can cause the position control unit to supply power to the storage battery when the power generation unit starts power generation.

According to this configuration, power generation by the power generation unit is started by the storage battery control unit, and when a large amount of electric power is required to control the position of the floating body in the sea, such as sinking the floating body to a predetermined depth, the position control unit is controlled by the storage battery. Since electric power is supplied to the floating body, it is possible to reduce the load on the power supply source that supplies electric power to the floating body from the outside.

Further, the storage battery control unit can cause the position control unit to supply power to the storage battery when the power generation unit ends power generation.

According to this configuration, when power generation by the power generation unit is terminated by the storage battery control unit and a large amount of power is required to control the position of the floating object in the sea, such as raising the floating object to the surface of the sea, the storage battery controls the position control unit. Since electric power is supplied, it is possible to reduce the burden on the power supply source that supplies electric power to the floating body from the outside of the floating body.

Further, the storage battery control unit charges the storage battery with excess power generated by the power generation unit while the power generation unit is generating power, and causes the storage battery to supplement the insufficient power generated by the power generation unit. , the power generated by the power generation unit can be smoothed.

According to this configuration, the storage battery control unit causes the storage battery to be charged with excess power generated by the power generation unit while the power generation unit is generating power, and charges the storage battery with insufficient power generated by the power generation unit. By replenishing the power, the power generated by the power generation unit is smoothed, so the fluctuation range of the power generated by the underwater floating type ocean current power generation device is reduced, and the external power system of the floating body is not affected as a disturbance. can be reduced.

According to the subsea floating type ocean current power generation device of one aspect of the present invention, even if the power supply to the floating body from the outside of the floating body is lost, the position of the floating body in the sea can be controlled by the power of the storage battery. .

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the underwater floating type ocean current power generation apparatus which concerns on embodiment. 1 is a block diagram showing a floating body and land facilities of an underwater floating type ocean current power generator according to an embodiment; FIG. FIG. 4 is a diagram showing an operation when charging of a storage battery is performed before starting power generation of the subsea floating type ocean current power generation device according to the embodiment; FIG. 4 is a diagram showing the operation when power generation of the subsea floating type ocean current power generation device according to the embodiment is started. FIG. 10 is a diagram showing the operation of the subsea floating type ocean current power generation device according to the embodiment when power generation is being performed; FIG. 4 is a diagram showing an operation when power generation of the subsea floating type ocean current power generation device according to the embodiment is terminated; It is a figure which shows the operation|movement when the electric power supply to a floating body from the outside of a floating body of the subsea floating type ocean current power generation apparatus which concerns on embodiment is lost.

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 rearward or downstream view. The terms "upper" and "lower" are used with reference to a vertical line when the floating body is in a stable state in the sea, which will be described later.

As shown in FIG. 1 , the subsea floating type ocean current power generation device 1 according to the embodiment of the present invention includes a floating body 100 and a mooring section 200 . The floating body 100 is made to float in the sea W and generates electricity by the ocean current F in the sea W. The mooring section 200 is arranged on the seabed B and mooring the floating body 100 with mooring ropes 201 . The electric power obtained by the power generation is transmitted to the power system of the land facility by the mooring rope 201 and the cable 202 along the seabed B. Also, part of the electric power for operating the floating body 100 is transmitted from the power system of the land facility to the floating body 100 via the cable 202, which is a power transmission line. The floating body 100 includes a central pod 101 , a left power generation pod 120 , a right power generation pod 130 , a left hub 140 , a right hub 150 , a connecting portion 160 and turbine blades 170 . The total length and width of the floating body 100 are, for example, 10m to 70m.

The central pod 101, the left power generation pod 120, and the right power generation pod 130 are cylindrical containers having internal spaces. The center pod 101 is arranged between the left power generation pod 120 and the right power generation pod 130 in the left-right direction, and is arranged above the left power generation pod 120 and the right power generation pod 130 . The left power generation pod 120 and the right power generation pod 130 have, for example, the same structure. The center pod 101, the left power generation pod 120 and the right power generation pod 130 are arranged such that the longitudinal central axes of the center pod 101, the left power generation pod 120 and the right power generation pod 130 are substantially parallel to each other. The central pod 101 , the left power generation pod 120 and the right power generation pod 130 are connected to each other by a connecting portion 160 .

A turbine blade 170 is connected to the left power generation pod 120 via a left hub 140 . A turbine blade 170 is connected to the right power generation pod 130 via a right hub 150 . As shown in FIG. 2 , the left power generation pod 120 has an air conditioner 121 , a power generation section 122 , a storage battery control section 123 , a system control panel 124 and a left attitude adjustment device 125 . Similarly, the right power generation pod 130 also includes a power generation section 122 and the like. As described above, the right power generation pod 130 and the right hub 150 have the same structures as the left power generation pod 120 and the left hub 140, respectively, so illustration and description thereof will be omitted. The air conditioner 121 controls the temperature of the air inside the left power generation pod 120 using power transmitted from the land facility 300 via the cable 202 and power of a storage battery 180 of the storage battery control unit 123, which will be described later.

The power generation unit 122 is integrated with the floating body 100 inside the left power generation pod 120 and generates power by the ocean current F in the sea W. Each of the power generation units 122 generates electric power by rotating turbine blades 170 arranged in each of the left power generation pod 120 and the right power generation pod 130 . The subsea floating type ocean current power generation device 1 is a twin-engine type ocean current power generation device. Also, two turbine blades 170 are arranged behind the left power generation pod 120 and the right power generation pod 130 . That is, the floating body 100 employs a downwind turbine. Further, in order to cancel the torque due to each other's rotation, the turbine blades 170 of the left power generation pod 120 and the right power generation pod 130 have pitches opposite to each other, and rotate in opposite directions upon receiving ocean currents.

The storage battery control unit 123 controls charging and discharging of the storage battery 180 . The storage battery control unit 123 includes a storage battery 180 , an ocean current power generation converter 181 and a storage battery converter 182 . The storage battery 180 is integrated with the floating body 100 inside the left power generation pod 120 . The storage battery 180 has a capacity that allows the position control unit 102 of the central pod 101 , which will be described later, to operate without power transmitted from the land facility 300 via the cable 202 . The ocean current converter 181 includes an AC/DC converter 183 and a DC/AC inverter 184 connected in series. The battery converter 182 includes an AC/DC converter 185 and a DC/AC inverter 186 in series.

The AC/DC converter 183 of the ocean current power generation converter 181 and the AC/DC converter 185 of the storage battery converter 182 are connected in parallel with the power generation section 122 . The DC/AC inverter 184 of the ocean current power generation converter 181 and the DC/AC inverter 186 of the storage battery converter 182 are connected in parallel with the outside. The AC/DC converter 185 and the DC/AC inverter 186 of the storage battery converter 182 are connected in parallel with the storage battery 180 . Note that the ocean current power generation converter 181 may be omitted.

System control board 124 includes uninterruptible power supply 126 and transformer 127 . The uninterruptible power supply 126 provides a portion of the power required by the left power pod 120 and the central pod 101 controls. Transformer 127 transforms the power supplied from storage battery control unit 123 . The left attitude adjuster 125 includes a left attitude adjuster left control panel 128 . The operation of the left attitude adjustment device left control panel 128 is controlled by the attitude adjustment air chamber common panel 111 of the central pod 101 and the central attitude adjustment device left control panel 113 which will be described later. The left attitude adjustment device left control panel 128 controls the attitude of the floating body 100 in the sea W by controlling the operation of the turbine blade shifting mechanism 141 of the left hub 140 that controls the pitch of the turbine blades 170 and the thrusters (not shown). do.

The central pod 101 has a position controller 102 , a buoyancy adjustment tank 103 and an attitude adjustment device 110 . The position control unit 102 includes a buoyancy adjustment air chamber common panel 104 , a buoyancy adjustment device right side control panel 105 and a buoyancy adjustment device left side control panel 106 . The buoyancy adjustment air chamber common panel 104, the buoyancy adjustment device right side control panel 105, and the buoyancy adjustment device left side control panel 106 of the position control unit 102 fill and drain seawater into the buoyancy adjustment tank 103 built in the central pod 101, thereby controlling the floating body. Adjust the buoyancy applied to 100.

The attitude adjustment device 110 includes an attitude adjustment air chamber common panel 111 , a central attitude adjustment device right side control panel 112 , a central attitude adjustment device left side control panel 113 and a high voltage receiving/transforming panel 114 . The attitude adjustment air chamber common panel 111 and the central attitude adjustment device left control panel 113 control the operation of the left attitude adjustment device left control panel 128 of the left attitude adjustment device 125 of the left power generation pod 120 to control the movement of the floating body 100 in the sea W control your posture. The attitude adjustment air chamber common panel 111 and the central attitude adjustment device right side control panel 112 similarly control the operation of the right power generation pod 130 . The position control unit 102 is integrated with the floating body 100 and controls the position of the floating body 100 in the sea W. Moreover, as will be described later, the storage battery 180 is integrated with the floating body 100 and supplies power to the position control section 102 .

The high-voltage switchboard 114 transmits power generated by the power generation units 122 of the left power generation pod 120 and the right power generation pod 130 to the power system 302 of the land facility 300 via the cable 202 . Also, the high voltage receiving/transforming board 114 receives power generated by the power generation unit 303 of the power system 302 of the land facility 300 via the cable 202 as part of the power for operating the floating body 100 . The high voltage receiving/transforming board 114 may receive part of the electric power for operating the floating body 100 from a diesel generator or the like on a remote island. The land facility 300 includes a high voltage power receiving and transforming facility 301 between the power system 302 and the floating body 100 .

The operation of the underwater floating type ocean current generator 1 of this embodiment will be described below. As shown in FIG. 3, during a time when the load on the electric power system 302 or the diesel generator on the remote island is low, such as at night before the subsea floating type ocean current power generation device 1 starts generating power, for example, the power generation unit 303 of the electric power system 302 The storage battery 180 is charged by the electric power generated by the battery 180 via the cable 202 and the DC/AC inverter 186 of the storage battery converter 182 of the storage battery control unit 123 . The storage battery 180 may be gradually charged with less power during the day.

The two power generation units 122 and the storage battery control units 123 illustrated in FIGS. 3 to 7 referred to below mean the power generation units 122 and the storage battery control units 123 of the left power generation pod 120 and the right power generation pod 130, respectively. do. 3 to 7 are the air conditioner 121 and the left attitude adjustment device 125 of the left power generation pod 120, the turbine blade shifting mechanism 141 of the left hub 140, and the right power generation pod. 130 and equipment corresponding to the air conditioner 121 and the left attitude adjustment device 125 of 130 and equipment corresponding to the turbine blade shifting mechanism 141 of the right hub 150 . The auxiliary machine 190 includes the position controller 102 of the central pod 101 and the attitude adjustment device 110 . That is, the auxiliary machine 190 includes the position control unit 102, the attitude adjustment device 110, and other equipment necessary for the operation of the floating body 100.

As shown in FIG. 4 , the storage battery control unit 123 causes the storage battery 180 to supply electric power to the position control unit 102, the attitude adjustment device 110, and the like when the power generation unit 122 starts power generation. Electric power is supplied from the storage battery 180 to the auxiliary machine 190 via the DC/AC inverter 186 of the storage battery converter 182 to drive the auxiliary machine 190 such as the position control unit 102 and the attitude adjustment device 110 .

Electric power is supplied from the storage battery 180 to the power generation unit 122 via the DC/AC inverter 186 of the storage battery converter 182, the DC/AC inverter 184 of the ocean current power generation converter 181, and the AC/DC converter 183. 122 is driven as a motor. The pitch of the turbine blades 170 is controlled to a pitch suitable for the sinking of the floating body 100 by the turbine blade shifting mechanism 141 to which power is supplied from the storage battery 180 . As a result, the floating body 100 is moved to a position suitable for power generation in the sea W.

As shown in FIG. 5 , storage battery control unit 123 causes storage battery 180 to be charged with excess power generated by power generation unit 122 when power generation unit 122 is generating power. The power generated by the power generation unit 122 is smoothed by supplementing the power of the storage battery 180 with the remaining power. The pitch of the turbine blades 170 is controlled by the turbine blade changing mechanism 141 to a pitch suitable for power generation.

Electric power generated by the power generation unit 122 is transmitted to the land power system 302 via the AC/DC converter 183 of the ocean current power generation converter 181 , the DC/AC inverter 184 and the cable 202 . Moreover, the excessive power generated by the power generation unit 122 charges the storage battery 180 via the AC/DC converter 183 , the DC/AC inverter 184 , and the DC/AC inverter 186 of the storage battery converter 182 . Further, the electric power of the storage battery 180 supplements the insufficient electric power generated by the power generation section 122 via the DC/AC inverter 186 of the storage battery converter 182 .

As shown in FIG. 6, the storage battery control unit 123 causes the storage battery 180 to supply electric power to the position control unit 102, the attitude adjustment device 110, and the like when power generation by the power generation unit 122 is terminated. Electric power is supplied from the storage battery 180 to the auxiliary machine 190 via the DC/AC inverter 186 of the storage battery converter 182 to drive the auxiliary machine 190 such as the position control unit 102 and the attitude adjustment device 110 .

Electric power is supplied from the storage battery 180 to the power generation unit 122 via the DC/AC inverter 186 of the storage battery converter 182, the DC/AC inverter 184 of the ocean current power generation converter 181, and the AC/DC converter 183. 122 is driven as a motor. The pitch of the turbine blades 170 is controlled to a feathering pitch suitable for the levitation of the floating body 100 by the turbine blade changing mechanism 141 to which power is supplied from the storage battery 180 . Thereby, the floating body 100 is floated to the surface of the sea.

As shown in FIG. 7, the storage battery control unit 123 supplies power to the storage battery 180 for the position control unit 102, the attitude adjustment device 110, etc. when power supply to the floating body 100 from the outside of the floating body 100 is lost. Let Loss of power supply to the floating body 100 from the outside of the floating body 100 includes disconnection of the cable 202 . Further, the loss of power supply to the floating body 100 from the outside of the floating body 100 includes the failure of the power generating section 303 of the power system 302 and the diesel generator on the remote island.

Electric power is supplied from the storage battery 180 through the DC/AC inverter 186 of the storage battery converter 182 to drive the auxiliary machines 190 such as the position control unit 102 and the attitude adjustment device 110 . The pitch of the turbine blades 170 is controlled to a feathering pitch suitable for movement of the floating body 100 by the turbine blade changing mechanism 141 to which power is supplied from the storage battery 180 . Thereby, the floating body 100 is floated to the surface of the sea.

In addition, the storage battery control unit 123 causes the storage battery 180 to generate power when power supply from the outside of the floating body 100 to the floating body 100 is lost and when the power transmission line for the power generated by the power generation unit 122 to the outside of the floating body 100 is broken. The electric power generated by the unit 122 is charged. A break in the power transmission line to the outside of the floating body 100 for power generated by the power generation unit 122 includes a break in the cable 202 . Further, when the power transmission line for the power generated by the power generation unit 122 to the outside of the floating body 100 is disconnected, the time when the high-voltage power receiving/transforming equipment 301 and the power system 302 of the land facility 300 break down is included. Electric power generated by the power generation unit 122 charges the storage battery 180 via the AC/DC converter 185 of the storage battery converter 182 . The above operation described with reference to FIG. 7 may be performed when the equipment of the floating body 100 fails.

According to the present embodiment, a floating body 100 that is floating in the sea, a power generation unit 122 that is integrated with the floating body 100 and generates power by an ocean current F in the sea W, and a position of the floating body 100 in the sea W that is integrated with the floating body 100 In the subsea floating type ocean current power generation device 1 equipped with a position control unit 102 that controls The position of the floating body 100 in the sea W can be controlled by the power of the storage battery 180 even if the power supply to the floating body 100 is lost.

Further, according to the present embodiment, when power supply to the floating body 100 from the outside of the floating body 100 is lost, the storage battery 180 controls the position control part 102 and attitude Since power is supplied to the adjustment device 110 and the like, even if the power supply to the floating body 100 from the outside of the floating body 100 is lost, the position of the floating body 100 in the sea W is controlled by the power of the storage battery 180. be able to. That is, the power of the storage battery 180 is used to perform the emergency drainage operation of the buoyancy adjustment tank 103 and the attitude control by the attitude adjustment device 110 and the like, so that the floating body 100 can float stably.

In addition, according to the present embodiment, when power supply to the floating body 100 from the outside of the floating body 100 is lost by the storage battery control unit 123, or when the power transmission line for the power generated by the power generation unit 122 to the outside of the floating body 100 is disconnected. Since the storage battery 180 is sometimes charged with the power generated by the power generation unit 122, the storage battery 180 absorbs the surplus power of the power generation unit 122 when power generation is stopped in an emergency, thereby functioning as a regenerative brake and performing regeneration. Energy can be stored in battery 180 . In addition, a part of the electric power generated by the subsea floating type ocean current power generation device 1 and emergency regenerative energy are charged in the storage battery 180, and the electric power is used for emergency drainage operation of the buoyancy adjustment tank 103 and attitude control by the attitude adjustment device 110 and the like. is performed, the floating body 100 can float stably.

Further, according to the present embodiment, when power generation by the power generation unit 122 is started by the storage battery control unit 123 and a large amount of electric power is required to control the position of the floating body 100 in the sea W, such as sinking the floating body 100 to a predetermined depth. In addition, since power is supplied to the position control unit 102 from the storage battery 180, the load on the power supply source such as the power system 302 that supplies power to the floating body 100 from the outside of the floating body 100 and the diesel generator on the remote island is reduced. can be made

Further, according to the present embodiment, when power generation by the power generation unit 122 is terminated by the storage battery control unit 123 and a large amount of electric power is required to control the position of the floating body 100 in the sea W such as raising the floating body 100 to the surface of the sea, Since power is supplied to the position control unit 102 by the storage battery 180, the burden on the power supply source such as the power system 302 that supplies power to the floating body 100 from the outside of the floating body 100 and the diesel generator on the remote island can be reduced. can be done.

Further, according to the present embodiment, when the power generation unit 122 is generating power, the storage battery control unit 123 causes the storage battery 180 to be charged with excess power generated by the power generation unit 122 so that the power generation unit 122 can stop power generation. By supplementing the insufficient power with the power of the storage battery 180, the power generated by the power generation unit 122 is smoothed. The external power system 302 can be reduced in influence as a disturbance.

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

1 Subsea floating type ocean current generator 100 Floating body 101 Central pod 102 Position control unit 103 Buoyancy adjustment tank 104 Buoyancy adjustment air chamber common panel 105 Buoyancy adjustment device right side control panel 106 Buoyancy adjustment device left side control panel 110 Attitude adjustment device 111 Attitude adjustment air chamber Common panel 112 Central attitude adjustment device right control panel 113 Central attitude adjustment device left control panel 114 High voltage receiving/transforming panel 120 Left power generation pod 121 Air conditioner 122 Power generation unit 123 Storage battery control unit 124 System control panel 125 Left attitude adjustment device 126 Uninterruptible power supply Device 127 Transformer 128 Left attitude adjustment device Left control panel 130 Right power generation pod 140 Left hub 141 Turbine blade shifting mechanism 150 Right hub 160 Connection part 170 Turbine blade 180 Storage battery 181 Ocean current power generation converter 182 Storage battery converter 183 AC/DC Converter 184 DC/DC inverter 185 AC/DC converter 186 DC/AC inverter 190 Auxiliary equipment 200 Mooring section 201 Mooring rope 202 Cable 300 Land facility 301 High voltage receiving and transforming facility 302 Power system 303 Power generation section W Undersea F Ocean current B Undersea

Claims (12)

A floating body that is made to float in the sea,
a power generation unit that is integrated with the floating body and generates power using the ocean current in the sea;
a position control unit that is integrated with the floating body and controls the position of the floating body in the sea;
a storage battery integrated with the floating body and supplying power to the position control unit;
A storage battery control unit that controls charging and discharging of the storage battery,
The storage battery control unit controls the storage battery to the power generation unit when power supply from the outside of the floating body to the floating body is lost and when a power transmission line for power generated by the power generation unit to the outside of the floating body is broken. An underwater floating type ocean current generator that charges the power generated by the 2. The underwater floating type ocean current power generation device according to claim 1 , wherein said storage battery control unit causes said position control unit to supply power to said storage battery when power generation by said power generation unit is started. The subsea floating type ocean current power generation device according to claim 1 or 2 , wherein the storage battery control unit causes the position control unit to supply power to the storage battery when power generation by the power generation unit is terminated. The storage battery control unit charges the storage battery with excess power generated by the power generation unit while the power generation unit is generating power, and supplements insufficient power generated by the power generation unit with power of the storage battery. The subsea floating type ocean current power generation device according to any one of claims 1 to 3 , wherein the power generated by the power generation unit is smoothed by causing the power generation unit to rotate. A floating body that is made to float in the sea,
a power generation unit that is integrated with the floating body and generates power using the ocean current in the sea;
a position control unit that is integrated with the floating body and controls the position of the floating body in the sea;
a storage battery integrated with the floating body and supplying power to the position control unit;
A storage battery control unit that controls charging and discharging of the storage battery,
The storage battery control unit causes the position control unit to supply power to the storage battery when power generation by the power generation unit is started. The storage battery control unit controls the storage battery to the power generation unit when power supply from the outside of the floating body to the floating body is lost and when a power transmission line for power generated by the power generation unit to the outside of the floating body is broken. 6. The subsea floating type ocean current power generation device according to claim 5, which is charged with electric power generated by power generation. 7. The subsea floating type ocean current power generation device according to claim 5, wherein said storage battery control unit causes said position control unit to supply electric power to said storage battery when power generation by said power generation unit is terminated. The storage battery control unit charges the storage battery with excess power generated by the power generation unit while the power generation unit is generating power, and supplements insufficient power generated by the power generation unit with power of the storage battery. The subsea floating type ocean current power generation device according to any one of claims 5 to 7, wherein the power generated by the power generation unit is smoothed by causing the power generation unit to rotate. A floating body that is made to float in the sea,
a power generation unit that is integrated with the floating body and generates power using the ocean current in the sea;
a position control unit that is integrated with the floating body and controls the position of the floating body in the sea;
a storage battery integrated with the floating body and supplying power to the position control unit;
A storage battery control unit that controls charging and discharging of the storage battery,
The storage battery control unit causes the position control unit to supply power to the storage battery when power generation by the power generation unit is terminated. The storage battery control unit controls the storage battery to the power generation unit when power supply from the outside of the floating body to the floating body is lost and when a power transmission line for power generated by the power generation unit to the outside of the floating body is broken. 10. The subsea floating type ocean current power generation device according to claim 9, which is charged with power generated by power generation. The subsea floating type ocean current power generation device according to claim 9 or 10, wherein the storage battery control unit causes the position control unit to supply power to the storage battery when the power generation unit starts power generation. The storage battery control unit charges the storage battery with excess power generated by the power generation unit while the power generation unit is generating power, and supplements insufficient power generated by the power generation unit with power of the storage battery. The subsea floating type ocean current power generation device according to any one of claims 9 to 11, wherein the power generated by the power generation unit is smoothed by causing the

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