JP2019094901A - Tidal current power generating system and mooring device - Google Patents

Abstract

To cause an orientation of a power generator to be varied in response to an orientation of a tidal current and to reduce a possibility in which the power generator is contacted with a sea bottom even if a size of the tidal current becomes large.SOLUTION: A tidal current power generating system is provided with a power generator 20, a mooring rope 30 and an intermediate weight 40. The power generator 20 is provided with a turbine, the power generator and a casing. The turbine is rotated by tide. The power generator generates power under rotation of said turbine. The casing holds said turbine and said power generator inside of it and has a mooring point. The mooring rope 30 is engaged with a sea bottom 51, extends from the sea bottom 51 toward the casing and is engaged with the mooring point. The casing has such an annular shape as one in which it passes towards a first opening and a second opening. The mooring point is placed near the first opening, a center of buoyancy of the power generator is placed near said second opening rather than the center of buoyancy. The intermediate weight 40 pulls the mooring rope 30 between the casing and the sea bottom 51 in a vertical downward direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tidal power generation system that generates power by tidal current and a mooring apparatus therefor.

  There is known a tidal power generation system that generates electricity by the flow of seawater during full and low tides, that is, tidal current. A tidal current power generation system arranges a turbine in seawater and generates electricity by rotating a generator by rotation of the turbine by tidal current. The generator is moored, for example, by cords extending from the seabed.

JP-A-55-72665 Patent No. 4642747 Patent No. 6150046

  In a tidal power generation system in which a mooring cable is connected to generate power from a floating generator, it is necessary to change the direction of the generator according to the change in the direction of the tidal current.

  In Patent Document 1, the center of gravity and the center of buoyancy of the floating body on which the generator is mounted are matched on the center line of the floating body, and a mooring point 4 is provided on a horizontal line orthogonal to the center line through this point. It has been shown to change the first moment of section of the floating body before and after the mooring point.

  In addition, if the gravity center, the buoyancy center, and the mooring point 4 are all the same, when the tidal current is lost, the posture of the floating body is not determined uniquely, so the explanation of FIG. 8 (paragraph 7, lines 1 to 5) In the eye, the mooring point 4 is provided offset to the inlet side of the floating body.

  However, if the mooring point is shifted as described above, the buoyancy of the floating body is greater than that of gravity, so the moment of buoyancy is larger than the moment due to gravity with respect to the mooring point, and floating occurs when tidal current occurs I can not keep my body horizontal.

  In patent document 2, it is shown that it has a mooring point 9 in order to make the turbine 3 provided with the turbine blade 5 pivotable, and the center of gravity and the center of buoyancy of the turbine are separated from each other.

  Although the positional relationship between the center of gravity and the center of buoyancy in Patent Document 2 is not specified, it is assumed that the center of buoyancy of the turbine 3 is on the turbine blade 5 side with respect to the center of gravity in order to attain the posture 8 of FIG. can do.

  However, in the positional relationship as described above, the moment of buoyancy is larger than the moment of gravity with respect to the mooring point, and the turbine can not be held horizontally when a tidal current occurs.

  In addition, in a tidal power generation system that generates electric power from a floating power generator connected to a mooring line, when the power flow is increased and the power received by the power generation device is increased, the power generation device sinks larger. If the sink of the power generation device becomes large, the power generation device may come in contact with the seabed and be damaged.

  For this purpose, Patent Document 3 includes a mooring angle detection means 9 for detecting an angle change of the mooring cord 7 due to the sinking of the power generation apparatus, but in consideration of adhesion of rust and marine life, such a detector is provided. It is better not to

  Therefore, an object of the present invention is to reduce the possibility of the power generation apparatus coming into contact with the seabed, even when the power flow in the tidal power generation system becomes large.

  In order to achieve the above object, the present invention, in a tidal power generation system, holds a turbine that rotates by tidal current, a generator that generates electricity by the rotation of the turbine, the turbine and the generator inside and outside. A tidal power generation system comprising: a power generation apparatus comprising: a casing having a mooring point formed thereon; and a mooring cord anchored to the seabed and extended from the seabed to the casing and anchored to the mooring point, The casing has an annular shape penetrating toward the first opening and the second opening, and the second opening is formed in a funnel shape larger than the first opening, and the anchoring point is the second opening Closer to the first opening, the center of buoyancy of the generator is closer to the second opening than the mooring point, and the center of gravity of the generator is closer to the second opening than the center of buoyancy. Do

  Further, according to the present invention, in a tidal power generation system, a turbine rotating by power flow, a generator generating electricity by rotation of the turbine, the turbine and the generator are held inside, and a mooring point is formed outside A generator comprising a casing, a mooring cord anchored to the seabed, extending from the seabed to the casing and anchored to the mooring point, vertically connecting the mooring cord between the casing and the seabed And an intermediate weight to be pulled downward.

  The present invention also includes a turbine that rotates by a tidal current, a generator that generates electricity by rotation of the turbine, and a casing that holds the turbine and the generator inside and a mooring point is formed on the outside. In a mooring device of a power generation apparatus, a mooring cord anchored to the seabed, extending from the seabed to the casing, and anchored to the mooring point, and the mooring cord vertically downward between the casing and the seabed And an intermediate weight to be pulled.

  ADVANTAGE OF THE INVENTION According to this invention, even when tidal current becomes large in a tidal current power generation system, possibility that a power generating device contacts the sea bed can be reduced.

FIG. 1 is a side view of a first embodiment of a tidal power generation system according to the present invention. FIG. 1 is a top view of a first embodiment of a tidal power generation system according to the present invention. FIG. 1 is a side view of a power generation device in a first embodiment of a tidal power generation system according to the present invention. It is a front view of the electric power generating apparatus in 1st Embodiment of the tidal current power generation system which concerns on this invention. It is a rear view of the electric power generating apparatus in 1st Embodiment of the tidal current power generation system which concerns on this invention. It is a side view which shows the attitude | position at the time of the diverted flow of 1st Embodiment of the tidal current power generation system which concerns on this invention. It is a side view which shows the attitude | position in case the power flow of 1st Embodiment of the tidal current power generation system which concerns on this invention is large. It is a side view which shows the attitude | position in case the tidal current of 1st Embodiment of the tidal current power generation system which concerns on this invention is still larger. It is a side view of a second embodiment of the tidal power generation system according to the present invention. It is a side view of a 3rd embodiment of a tidal current power generation system concerning the present invention. It is a top view of 3rd Embodiment of the tidal current power generation system which concerns on this invention. It is a side view showing the attitude at the time of the diversion of a 3rd embodiment of the tidal current power generation system concerning the present invention. It is a side view which shows the attitude | position in case the power flow of 3rd Embodiment of the tidal current power generation system which concerns on this invention is large. It is a side view which shows the attitude | position in case the power flow of 3rd Embodiment of the tidal current power generation system which concerns on this invention is still larger.

  Several embodiments of a tidal power generation system according to the present invention will be described with reference to the drawings. Note that these embodiments are merely illustrative, and the present invention is not limited thereto. The same or similar configurations will be denoted by the same reference symbols, and overlapping descriptions will be omitted.

First Embodiment
FIG. 1 is a side view of a first embodiment of a tidal power generation system according to the present invention. FIG. 2 is a top view of the tidal power generation system of the present embodiment. FIG. 3 is a side view of the power generation apparatus in the present embodiment. FIG. 4 is a front view of the power generation device in the present embodiment. FIG. 5 is a rear view of the power generation device according to the present embodiment.

  The tidal current power generation system 10 of the present embodiment generates power by tidal current. Here, the tidal current is the flow of sea water (seawater), and includes the flow of sea water whose direction is periodically changed by the tide. For example, seawater flows generally in the direction of arrow 91 in the time zone for high tide, and flows in the direction of arrow 92 in the time zone for low tide. FIG. 1 shows the situation when the direction of the tidal current is the direction of the arrow 92.

  The tidal power generation system 10 includes a power generation device 20, a mooring cord 30, and an intermediate weight 40. The power generator 20 has a turbine 27, a generator 26 and a casing 23. The casing 23 is formed in an annular shape penetrating from the first opening 21 toward the second opening 22. Each of the first opening 21 and the second opening 22 of the casing 23 is circular. The second opening 22 of the casing 23 is larger than the first opening 21. The casing 23 is funnel-shaped. A pair of horizontal wings 24 project on both sides in the horizontal direction on the outer surface of the casing 23.

  The mooring line 30 is anchored to the seabed 51 with an anchor 50. The mooring line 30 extends from the seabed 51 to the casing 23. The end opposite to the bottom 51 of the mooring cord 30 is attached to the casing 23. The end on the casing 23 side of the mooring cord 30 branches into two, and is attached to the anchoring point 25 of the horizontal wing 24 of the casing 23 respectively. The attachment portion of the mooring cord 30 to the horizontal wing 24 is preferably rotatable.

  Casing 23 is made of resin, for example. The casing 23 may be made of a steel plate having a watertight hollow portion formed therein. The turbine 27 is made of, for example, a resin. The turbine may be formed of steel plate or other metal plate. The generator 26 is coupled to the rotational shaft of the turbine 27 and generates electricity by the rotation of the turbine 27. A cable (not shown) is connected to the generator 26, and the generated electricity is connected to, for example, a land transmission line. The power generation device 20 is formed such that the buoyancy in seawater as a whole is greater than the gravity.

  The mooring cord 30 is, for example, a bundle of metal wires. The anchor 50 rotatably supports the mooring line 30, for example.

  The intermediate weight 40 is made of, for example, steel, and gravity is larger than buoyancy. The intermediate weight 40 is fixed at, for example, the center of the mooring line 30. The total of the buoyancy received by the mooring cord 30, the intermediate weight 40, and the power generation device 20 is larger than the gravity received by the mooring cord 30, the intermediate weight 40, and the power generation device 20.

  FIG. 6 is a side view showing the attitude of the tidal power generation system of the present embodiment at the time of diverting.

  At the time of diverting, that is, when there is no tidal current or the tidal current magnitude is below a certain threshold, the sum of the buoyancy received by the mooring cord 30, the intermediate weight 40 and the generator 20 is the mooring cord 30 and the intermediate weight 40. And the power generation device 20 is larger than the gravity received, the second opening 22 of the casing 23 is up and stopped. If the mooring line 30 is sufficiently long, the casing 23 floats on the sea surface.

  FIG. 7 is a side view showing an example of the attitude when the tidal current of the tidal power generation system of the present embodiment is generated.

  When the magnitude of the power flow is equal to or greater than a threshold value, the power generation device 20 is flowed in the direction of the arrow 92, as shown in FIG. When the angle θ between the axis of the power generator 20 and the tidal current is positive (θ> 0 degrees), a clockwise moment 922 acts on the mooring point 25. When θ = 0 degrees, as in the present embodiment, if casing 23 is axially symmetrical about the axis from first opening 21 to second opening 22, moment 922 is 0 because of its symmetry. It becomes (zero).

  As shown in FIG. 3, the mooring point 25 is provided relatively close to the first opening 21. The buoyancy center 201 of the power generation device 20 is located closer to the second opening 22 than the mooring point 25. That is, the power generation device 20 is formed such that its buoyancy center 201 is located between the mooring point 25 and the second opening 22. The center of gravity 202 of the power generation device 20 is located closer to the second opening 22 than the center of buoyancy 201. That is, the power generation device 20 is formed such that the center of gravity 202 thereof is located between the buoyancy center 201 and the second opening 22.

Assuming that the distance between the mooring point 25 and the buoyancy center 201 is a, and the distance between the mooring point 25 and the center of gravity 202 is b,
a × (buoyancy of the generator) = b × (gravity of the generator)
The moments generated by the buoyancy and gravity of the generator 20 balance. As a result, the axis of the power generation device 20 coincides with the tidal current direction, becomes horizontal and faces the tidal current. At this time, since the axial center of the power generation device 20 coincides with the tidal current direction, the moment generated by the force received by the casing 23 from the tidal current is zero.

a × (buoyancy of the generator)> b × (gravity of the generator)
In such a case, a moment (counterclockwise direction in FIG. 3) acts on the second opening 22 upward with respect to the anchoring point 25. Therefore, the angle θ between the axis of the power generation device 20 and the current flow is positive (θ> 0 degrees), and the moment the power generation device 20 receives from the current flow and the moment generated in the power generation device 20 by the buoyancy and gravity of the power generation device 29 are At a balanced angle, the generator 20 is substantially stationary.

  As shown in FIG. 1, the power generation apparatus 20 is flowed to face the flow with the first opening 21 on the upstream side and the second opening 22 on the downstream side. Since the length of the mooring cord 30 is limited, when the power generation device 20 is flowed downstream, the power generation device 20 sinks into the sea.

  When the power generation device 20 sinks into the sea where there is a tidal current, the turbine 27 rotates. When the turbine 27 rotates, the shaft of the generator 26 rotates and the generator 26 rotates.

  The power generation device 20 has the same structure as a wind turbine using a so-called wind lens. That is, by the casing 23 acting as a fluid collecting fluid, a stronger flow hits the turbine 27. In addition, since a vortex is formed on the downstream side of the casing 23, the pressure in the vicinity of the second opening 22 is reduced, and the flow of seawater becomes faster. For this reason, power generation efficiency is improved.

  FIG. 8 is a side view showing a posture when the tidal current of the tidal power generation system according to the present embodiment is further large.

  When the power flow is increased, the power to push the power generation device 20 in the horizontal direction is increased, so the power generation device 20 sinks deeper. The power generation device 20 is stabilized at a position where the force received from the current flow and the buoyancy received by the mooring cord 30, the intermediate weight 40, and the power generation device 20 can be balanced.

  When the tidal current further increases, first, the intermediate weight 40 contacts the seabed 51. When the intermediate weight 40 contacts the sea bed 51, apparently, the gravity acting on the intermediate weight 40 and the anchor 50 of the mooring cord 30 to the intermediate weight 40 disappears. For this reason, apparently the buoyancy acting on the power generation device 20 is increased. As a result, the sinking of the power generation device 20 is suppressed.

  As described above, in the tidal current power generation system 10 according to the present embodiment, even when the tidal current increases, the possibility that the power generation device 20 contacts the sea bed 51 is reduced without using a detector or the like. As a result, the possibility of breakage due to the power generation device 20 coming into contact with the seabed is reduced. Thus, the tidal power generation system 10 can be an economical and reliable system. Further, since the tidal current is stronger to some extent above the vicinity of the seabed 51, the tidal power generation system 20 of the present embodiment does not reduce the amount of power generation much.

  Even when the direction of the tidal current is changed, for example, when the direction of the tidal current is reversed, such as when the tidal current changes from the rising tide, the power generation apparatus 20 faces the tidal current and generates power. As a result, the power generation efficiency of the power generation device 20 can be improved.

  Further, in the tidal power generation system according to the present embodiment, since the horizontal wing 24 is provided in the casing 23, the vibration in the rotational direction around the axis is suppressed. When the attachment portion of the mooring cord 30 to the horizontal wing 24 is rotatable, the anchoring point 25 of the horizontal wing 24 rotates in response to the change in the attitude of the casing 23, so that excessive stress is not generated at the mooring point.

  The buoyancy center 201 of the power generation device 20 is located closer to the second opening 22 than the mooring point 25. For this reason, when the power flow becomes small and power generation can not be performed, the power generation device 20 rotates about 90 degrees to change the posture such that the second opening 22 faces upward. For this reason, the attachment part of the mooring cord 30 does not rotate in the same direction, and a twist accumulates.

  Furthermore, by forming the buoyancy center 201 of the power generation device 20 so as to be closer to the second opening 22 than the mooring point 25, when the tidal current becomes smaller, the power generation device 20 has an attitude in which the second opening 22 faces upward. Take Since the second opening 22 is larger than the first opening 21, it is easy to access from the sea and maintain when the second opening 22 faces upward. In addition, since the second opening 22 larger than the first opening 21 faces upward, the moment generated by the force received by the power generation device 20 from the tidal current is the direction of the power generation device 20 from the first opening 21 to the second opening 22 Will be parallel to the tide. For this reason, even when the power flow is low, the first opening 21 is directed upstream and the second opening 22 is downstream.

  In the present embodiment, the intermediate weight 40 is fixed to the mooring cord 30, but it may be anything as long as it pulls the mooring cord 30 vertically downward by gravity. For example, a rope may be fixed to the mooring cord 30, and a weight may be attached to the lower end of the rope. Moreover, the intermediate weight 40 may be plural. Furthermore, the intermediate weight 40 may be attached to the mooring cord 30 so as to be movable in a predetermined range of the central portion of the mooring cord 30.

  In the present embodiment, the casing 23 is an annular shape whose cross section is surrounded by an outer circle and an inner circle, but is not limited to a circle and may be a polygon, for example, an outer circle and an inner circle Either or both may be polygons. Also, either or both of the outer circle and the inner circle may be elliptical. Furthermore, from the first opening 21 to the second opening, it may be changed from a circle to an ellipse or from an ellipse to a circle, or from a circle to a polygon or from a polygon to a circle.

Second Embodiment
FIG. 9 is a side view of the second embodiment of the tidal power generation system according to the present invention.

  The tidal current power generation system 10 of the present embodiment is obtained by removing the intermediate cone 40 from the tidal current power generation system (see, for example, FIG. 1) of the first embodiment.

  When the magnitude of the tidal current is above a certain threshold, the generator 20 is caused to flow in the direction of the arrow 92. When the angle θ between the axis of the power generator 20 and the tidal current is positive (θ> 0 degrees), a clockwise moment 922 acts on the mooring point 25. When θ = 0 degrees, as in the present embodiment, if casing 23 is axially symmetrical about the axis from first opening 21 to second opening 22, moment 922 is 0 because of its symmetry. It becomes (zero).

Assuming that the distance between the mooring point 25 and the buoyancy center 201 is a, and the distance between the mooring point 25 and the center of gravity 202 is b,
a × (buoyancy of the generator) = b × (gravity of the generator)
The moments generated by the buoyancy and gravity of the generator 20 balance. As a result, the axis of the power generation device 20 coincides with the direction of the tidal current, becomes horizontal and faces the other. At this time, since the axial center of the power generation device 20 coincides with the tidal current direction, the moment generated by the force received by the casing 23 from the tidal current is zero.

a × (buoyancy of the generator)> b × (gravity of the generator)
In such a case, a moment (counterclockwise direction in FIG. 3) acts on the second opening 22 upward with respect to the anchoring point 25. Therefore, the angle θ between the axis of the power generation device 20 and the current flow is positive (θ> 0 degrees), and the moment the power generation device 20 receives from the current flow and the moment produced in the power generation device 20 by the buoyancy and gravity of the power generation device 20 are At a balanced angle, the generator 20 is substantially stationary.

  In addition, when the maximum magnitude of the tidal current is known in advance, the relationship between the buoyancy of the power generation device 20 and the gravity can be appropriately defined to prevent the contact with the seabed 51.

  In order to adjust the positional relationship between the center of gravity and the center of gravity of the power generation device 20, the additional mass may be fixed substantially coaxially with the generator. The additional mass may be a nut portion of a screw-nut mechanism, or a plurality of mass plates of unit weight may be stacked and fixed.

Third Embodiment
FIG. 10 is a side view of the third embodiment of the tidal power generation system according to the present invention. FIG. 11 is a top view of the tidal power generation system of the present embodiment.

  The tidal current power generation system 11 of the present embodiment has four mooring lines 30. Further, the intermediate weight 40 is fixed at the center of each mooring line 30. The four mooring cords 30 are provided two each on both sides of the direction of the tidal current with respect to the power generation device 20. The mooring cords 30 located on the same side of the current flow direction with respect to the power generation device 20 are anchored to the seabed at a position spaced apart in the direction crossing the current flow. The width of the locking position of the mooring cord 30 located on the same side of the power flow direction with respect to the power generation device 20 is wider than the width of the mounting position of the mooring cord 30 on the power generation device 20.

  Even in such a tidal power generation system 11, the direction of the tidal current is opposite in the full tide and the low tide, but is generally fixed. Therefore, even if the power generating apparatus 20 is connected by the four mooring lines 30, the direction of the tidal current can be substantially faced.

  FIG. 12 is a side view showing the attitude of the tidal power generation system of the present embodiment at the time of diverting.

  At the time of diverting, that is, when there is no tidal current or the tidal current magnitude is below a certain threshold, the sum of the buoyancy received by the mooring cord 30, the intermediate weight 40 and the generator 20 is the mooring cord 30 and the intermediate weight 40. And the power generation device 20 is larger than the gravity received, the second opening 22 of the casing 23 is up and stopped. If the mooring line 30 is sufficiently long, the casing 23 floats on the sea surface.

  When the power flow is increased, the power to push the power generation device 20 in the horizontal direction is increased, so the power generation device 20 sinks deeply as shown in FIG. The power generation device 20 is stabilized at a position where the force received from the current flow and the buoyancy received by the mooring cord 30, the intermediate weight 40, and the power generation device 20 can be balanced. At this time, the intermediate weight 40 attached to the downstream mooring line 30 sinks deeper than the upstream intermediate weight 40.

  FIG. 13 is a side view showing an attitude when the tidal current of the tidal power generation system of the present embodiment is larger.

  When the tidal current becomes larger, first, the intermediate weight 40 attached to the downstream mooring line 30 contacts the seabed 51. When the intermediate weight 40 contacts the sea bed 51, apparently, the gravity acting on the intermediate weight 40 and the anchor 50 of the mooring cord 30 to the intermediate weight 40 disappears. For this reason, apparently the buoyancy acting on the power generation device 20 is increased. As a result, the sinking of the power generation device 20 is suppressed.

  FIG. 14 is a side view showing a posture when the tidal current of the tidal power generation system according to the present embodiment is further large.

  When the tidal current is larger than in the state of FIG. 14, the intermediate weight 40 attached to the upstream mooring line 30 also contacts the seabed 51. When the intermediate weight 40 contacts the sea bed 51, apparently, the gravity acting on the intermediate weight 40 and the anchor 50 of the mooring cord 30 to the intermediate weight 40 disappears. For this reason, apparently the buoyancy acting on the power generation device 20 becomes larger. As a result, the sinking of the power generation device 20 is further suppressed.

  As described above, in the tidal power generation system 11 of the present embodiment, even when the tidal current increases, the possibility that the power generation device 20 contacts the seabed 51 is reduced. As a result, the possibility of breakage due to the power generation device 20 coming into contact with the seabed is reduced. Further, since the tidal current is stronger to some extent above the vicinity of the seabed 51, the tidal power generation system 11 of the present embodiment does not significantly reduce the amount of power generation.

  Furthermore, in the present embodiment, since the intermediate weight 40 is disposed on the upstream side and the downstream side, the change in buoyancy due to the landing of the intermediate weight 40 on the seabed 51 can be made in two stages. For this reason, the appropriate height in seawater can be maintained with respect to the size of a wider current.

  Further, in the present embodiment, the mooring cords 30 are anchored to the seabed at locations separated in the direction transverse to the flow of tidal current. For this reason, even when the direction of the tidal current changes, the intermediate weight 40 attached to one of the mooring cords 30 first contacts the seabed 51 across the direction of the tidal current. Horizontal yawing is suppressed.

DESCRIPTION OF SYMBOLS 10 ... Tidal current power generation system, 11 ... Tidal current power generation system, 20 ... Power generation device, 21 ... 1st opening, 22 ... 2nd opening, 23 ... Casing, 24 ... Horizontal wing, 25 ... Mooring point, 26 ... Generator, 27 ... Turbine, 30: mooring cord, 40: intermediate weight, 50: anchor, 51: sea bed, 201: buoyancy center, 202: center of gravity, 922: moment

Claims (6)

A power generation apparatus comprising: a turbine rotating by a tidal current; a generator generating electricity by rotation of the turbine; and a casing holding the turbine and the generator inside and having a mooring point formed on the outside.
A mooring cord anchored to the seabed and extending from the seabed to the casing and anchored to the mooring point;
Tidal power generation system having
The casing has an annular shape penetrating toward the first opening and the second opening, and the second opening is formed in a funnel shape larger than the first opening.
The mooring point is closer to the first opening than the second opening;
The center of buoyancy of the generator is closer to the second opening than the mooring point,
The center of gravity of the generator is closer to the second opening than the center of buoyancy,
A tidal power generation system characterized by   The distance between the center of buoyancy and the mooring point multiplied by the buoyancy of the power generator is equal to or greater than the distance between the center of gravity and the mooring point multiplied by the gravity of the generator. The tidal power generation system according to 1.   The tidal power generation system according to any one of claims 1 to 2, further comprising an intermediate weight that pulls the mooring cord vertically downward between the casing and the seabed.   The tidal current power generation system according to any one of claims 1 to 3, wherein the mooring cord includes two anchored to the seabed at a location separated in the direction of the flow of the tidal current. . A power generation apparatus comprising: a turbine rotating by a tidal current; a generator generating electricity by rotation of the turbine; and a casing holding the turbine and the generator inside and having a mooring point formed on the outside.
A mooring cord anchored to the seabed and extending from the seabed to the casing and anchored to the mooring point;
An intermediate weight which pulls the mooring cord vertically downward between the casing and the seabed;
A tidal power generation system characterized by having: A mooring device for a power generation system, comprising: a turbine rotating by a tidal current; a generator generating electricity by rotation of the turbine; and a casing holding the turbine and the generator inside and having a mooring point formed on the outside In
A mooring cord anchored to the seabed and extending from the seabed to the casing and anchored to the mooring point;
An intermediate weight which pulls the mooring cord vertically downward between the casing and the seabed;
Mooring device characterized by having.

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