KR20170049893A - Propulsion control system for floating offshore plant - Google Patents

Propulsion control system for floating offshore plant Download PDF

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Publication number
KR20170049893A
KR20170049893A KR1020150150781A KR20150150781A KR20170049893A KR 20170049893 A KR20170049893 A KR 20170049893A KR 1020150150781 A KR1020150150781 A KR 1020150150781A KR 20150150781 A KR20150150781 A KR 20150150781A KR 20170049893 A KR20170049893 A KR 20170049893A
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KR
South Korea
Prior art keywords
hull
propulsion control
ship
propulsion
thruster
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Application number
KR1020150150781A
Other languages
Korean (ko)
Inventor
김덕기
Original Assignee
현대중공업 주식회사
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Priority to KR1020150150781A priority Critical patent/KR20170049893A/en
Publication of KR20170049893A publication Critical patent/KR20170049893A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/21—Control means for engine or transmission, specially adapted for use on marine vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B49/00—Arrangements of nautical instruments or navigational aids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
    • B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/125—Arrangements on vessels of propulsion elements directly acting on water of propellers movably mounted with respect to hull, e.g. adjustable in direction, e.g. podded azimuthing thrusters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
    • G01C13/002—Measuring the movement of open water
    • G01C13/006—Measuring the movement of open water horizontal movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2213/00—Navigational aids and use thereof, not otherwise provided for in this class
    • B63B2213/02—Navigational aids and use thereof, not otherwise provided for in this class using satellite radio beacon positioning systems, e.g. the Global Positioning System GPS

Abstract

A propulsion control system for a floating offshore plant includes: a detector for detecting a current position and an offshore condition of the hull; A propulsion control unit for determining the movement of the ship based on the sea condition and generating a control signal for propelling the ship based on the current position of the ship when the movement of the ship is determined; And a thruster driving unit for driving a stern side thruster that provides thrust according to a control signal generated from the propulsion control unit to move the hull. And a variable thruster for imparting thrust to the stern side.
Accordingly, it is possible to move the hull to the proper position by performing self-disposition according to the sea condition, if necessary, at a fixed mooring position, away from the level of simply adjusting / maintaining the forward direction of the floating offshore plant.

Figure P1020150150781

Description

[0001] PROPULSION CONTROL SYSTEM FOR FLOATING OFFSHORE PLANT [0002]

The present invention relates to a propulsion control system for a floating offshore plant, and more particularly to a propulsion control system for a floating offshore plant, in which the propulsion direction of a floating offshore plant is simply adjusted / maintained at a fixed mooring position, And to a propulsion control system for a floating offshore plant.

Floating offshore plants such as LNG-FPSO (Floating Production Storage and Offloading) and FLNG (Floating Liquefied Natural Gas) are used to produce, store and unload LNG by mining natural gas buried in the sea floor As a marine facility.

Such a floating offshore plant consists of a sub-facility (hull) that floats all facilities at sea and stores LNG, and a topside that pretreats, liquefies and unloads LNG.

In the floating type offshore plant, when the LNG produced and stored by itself is transported to the user, the LNG vessel 10 is stuck to the floating offshore plant 20 and the floating offshore plant 20 to the LNG carrier 10, the LNG carrier 10 transfers the LNG to the user.

When the LNG ship 10 is unloaded to the LNG ship 10 by docking the LNG ship 10 to the floating offshore plant 20 as described above, the hull of the floating offshore plant 20 can be unloaded by the anchor chain 51, A turret 50 which collects the natural gas collected from the platform of the seabed so that the distance between the LNG vessel 10 and the LNG vessel 10 is maintained within a predetermined range, It is necessary to adjust the position of the plant 20 in the left and right directions.

Thus, in the past, a turret system was used to adjust the hull position of the floating offshore plant 20.

The turret system comprises a turret 50, which is a fixed cylindrical steel structure that is connected to a mooring line and is not rotating, wherein the hull of the floating offshore plant 20 is coupled to the turret 50 by a bearing system and a rotary coupling , The hull of the floating offshore plant (20) is freely rotated about the turret (50) by the propulsive force and the steering of the stern side to adjust the position and smooth the flow of the submerged fluid.

That is, in the conventional floating-type offshore plant 20, the hull is fixed at a specific position, and the hull of the floating offshore plant 20 is rotated in place around the turret 50 as illustrated in FIG. 2, / RTI >

Such a conventional floating offshore plant 20 is configured such that it can adjust / maintain the bow direction only, is not capable of self-limiting at all, or is capable of extremely limited positional movement on the extension line of the mooring function.

Therefore, if a floating offshore plant is to be moved to another area, for example due to an unusual climate, hurricane or severe offshore climate change can occur and there is a significant risk to the operation, appropriate action is difficult, There is a problem that the re-installation, operation, and maintenance take a lot of time and cost, resulting in a decrease in economy.

Korean Registered Patent No. 10-1307571 (Date of Notification: 2013.09.12.)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and its object is to provide a floating structure for a floating mooring plant, And to provide a propulsion control system for a floating offshore plant capable of moving a hull to an appropriate position by performing an obstacle avoidance operation.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to another aspect of the present invention, there is provided a propulsion control system for a floating offshore plant, comprising: a detection unit for detecting a current position and an offshore condition of a ship; A propulsion control unit for determining whether to move the ship based on the sea state detected by the detection unit and generating a control signal for propelling the ship based on the current position of the ship when the movement of the ship is determined; And a thruster driving unit for driving the stern side thrusters for providing thrust according to the control signal generated from the propulsion control unit to move the hull.

In the propulsion control system for a floating offshore plant according to the present invention, the detection unit may include: a gyro compass for detecting azimuth information; A wind sensor for detecting wind direction and velocity information; A current sensor for detecting direction and velocity information of the current; And a GPS signal receiver for receiving GPS (Global Positioning System) signals from the satellite.

In the propulsion control system for a floating offshore plant according to the present invention, the propulsion control unit grasps the sea state based on wind direction and velocity information from the wind sensor, current direction and velocity information from the current sensor, A monitoring unit for determining whether or not to move the hull according to the movement of the hull; And a controller for grasping the current position of the hull by the GPS signal from the gyro compass and the GPS signal from the GPS signal receiver to determine the current position of the hull and the control for propelling the hull based on the difference between the current position of the hull and a predetermined target position And an operation unit for generating a signal.

In the propulsion control system for a floating offshore plant according to the present invention, the operation unit may transmit a hull movement request to an external monitoring server and receive a target position with a good resolution state by the manager in response thereto.

In the propulsion control system for a floating offshore plant according to the present invention, the calculating unit itself selects the target position according to a predetermined moving reference, the target position being an arbitrary point outside the predetermined influence radius from the current position of the hull, It can be selected from the nearest point among the registered plural candidate points, and the previously registered coastal mooring point.

In the propulsion control system for a floating offshore plant according to the present invention, the thruster drive unit selectively drives each of the motors for driving the two thruster-side thrusters in accordance with a control signal output from the propulsion control unit It is possible to move the hull to a predetermined target position while adjusting the propulsion direction and the propulsion speed.

In the propulsion control system for a floating offshore plant according to the present invention, each of the variable thruster is provided on a stern side, and includes a propeller in a duct and is coupled to the bottom of the hull through a support, The propulsion direction is adjusted by adjusting the duct and the propeller to the left and right direction of the ship by rotating the supporter so that the driving shaft provided inside the support is driven by the motor to rotate the propeller to generate propulsive force in the forward and backward directions .

According to the propulsion control system for a floating offshore plant according to the present invention, when the floating direction of the floating offshore plant is not simply adjusted / maintained at a fixed mooring position, Position.

Figure 1 illustrates the operation of a conventional floating offshore plant.
Figure 2 illustrates the use of a turret in a conventional floating offshore plant.
3 is a bottom view illustrating the installation of a thruster for hull movement of a floating offshore plant according to the present invention.
4 is a side view illustrating the installation of a variable thruster applicable to the present invention.
5 is a block diagram illustrating a propulsion control system for a floating offshore plant in accordance with the present invention.
6 is a perspective view illustrating a variable thruster applicable to the present invention.

Hereinafter, a propulsion control system for a floating offshore plant according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The propulsion control system for a floating offshore plant according to the present invention is intended to give maneuverability to a floating offshore plant structure so that self-monitoring is possible. In order to implement this, a bottom view of FIG. 3 and a view Likewise, the thruster 40 is installed on the bottom of the floating marine plant 20 so that the hull of the floating marine plant 20 can be moved by driving the thruster 40 .

Preferably, two variable thrusters 40 for propelling the hull are provided on the stern side. Through the two variable thrusters 40, propulsive force is imparted to the hull in the forward, backward, .

The variable thruster (40) installed on the stern side of the floating offshore plant (20) is installed so as to be immersed in seawater.

As described above, the variable stator 40 is installed on the stern side of the floating offshore plant 20, and the variable thruster 40 is driven to draw the seawater to generate the propulsive force, The hull position of the offshore plant 20 can be moved.

In one embodiment, each variable thruster 40 has one propeller, which adjusts the direction of the propeller to the left and right to adjust the propulsion direction and generate propulsive forces in the forward and backward directions (e.g., the Y-axis direction) And the position of the hull of the floating offshore plant (20) is shifted by the corresponding thrust.

In this configuration, the floating floating plant 20 can be fixedly moored at a predetermined position as it is known, and then rotated around the turret 50 to adjust its position in the left and right directions by a certain amount.

In this state, for example, when the marine condition deteriorates and the hull position is to be moved to another area that is separated from the current mooring area by a certain distance, the mooring using the turret 50 and other facilities is released, It is possible to move the hull of the floating marine plant 20 by appropriately controlling the drive of the stern side variable thruster 40, thereby achieving its own appeal.

5 is a block diagram illustrating a propulsion control system for a floating offshore plant in accordance with the present invention.

5, the propulsion control system for a floating offshore plant according to the present invention includes a detection unit 110, a hull integrated control unit 120, a propulsion control unit 130, and thruster driving units 141 and 142, It is possible to implement the self-defense according to the state of the sea state by controlling the driving of the variable thruster 40 installed on the stern side.

The integrated ship control unit 120 includes a centralized control unit 20 for controlling the overall operation of the floating marine plant 20 for producing, storing, and unloading the LNG, including a mooring function of the floating marine plant 20 or a self- to be.

The propulsion control unit 130 is a part for controlling the self-containment function of the floating integrated plant 20 in cooperation with the ship integration control unit 120, and may be integrally implemented with the ship integration control unit 120 according to the embodiment.

The detection unit 110 detects the current position and the sea state of the hull to provide the propulsion control unit 130 with its own detection.

In one embodiment, the detection unit 110 includes a wind sensor 112 and a current sensor 113 for grasping the sea condition, and further includes a gyro compass 111 and a GPS signal receiving unit 114).

The wind sensor 112 detects wind direction and velocity information and provides the detected wind direction and velocity information to the propulsion control unit 130. The current sensor 113 detects the current direction and velocity information of the current and provides it to the propulsion control unit 130.

The gyro compass 111 detects the azimuth information and provides it to the propulsion control unit 130. The GPS signal receiving unit 114 receives a Global Positioning System (GPS) signal from the satellite and provides it to the propulsion control unit 130.

The propulsion control unit 130 controls the thruster driving units 141 and 142 for driving the two variable thrusters 40 installed on the aft side of the floating offshore plant 20 as described above, 20 based on the current state of the hull detected by the detection unit 110 when the movement of the hull is determined based on the resolution state detected by the detection unit 110, And generates a control signal for hull propulsion.

For this, the above-described propulsion control unit 130 may include a monitoring unit 131 and an operation unit 132.

The monitoring unit 131 detects the change of the sea state based on the wind direction and velocity information from the wind sensor 112 and the current direction and velocity information from the current sensor 113, .

For example, when the wind direction and the speed, or the direction and velocity of the sea current suddenly change suddenly several times or exceed the threshold value for a predetermined time or more, it is determined that the sea condition deteriorates and the movement of the hull can be determined.

The calculation unit 132 determines the current position of the hull by the azimuth information from the gyro compass 111 and the GPS signal from the GPS signal reception unit 114 when the hull movement is determined in the monitoring unit 131, Based on the difference between the target position and the predetermined target position, generates a control signal for hull propulsion and applies the corresponding control signal to the thruster driving units 141 and 142. [

The operation unit 132 may transmit a hull movement request to an external monitoring server and receive a target position in a good resolution state by the manager in response to the hull movement request.

Also, the calculation unit 132 may select the target position itself according to a predetermined moving reference. In this case, the target position may be selected as an arbitrary point outside the predetermined influence radius from the current position of the hull, the closest point among the plurality of candidate points previously registered, and the previously registered coastal aqueduct.

The thruster driving units 141 and 142 drive the stern side thrusters 40 that provide thrust according to the control signal applied from the calculating unit 132 of the propulsion control unit 130 to move the hull.

5, the stern side thrusters 40 are provided by the two variable thrusters 40 described above, and thruster driving units 141 and 142 are also provided by two And drives each of the variable thruster (40).

At this time, the thruster driving units 141 and 142 selectively drive two motors for driving the aft-side variable thruster 40 according to the control signal output from the propulsion control unit 130 (the frequency- The speed of each of the two motors may be varied by applying a current to adjust the propulsion direction and the propulsion speed to move the hull to a predetermined target position.

6 is a perspective view illustrating a variable thruster applicable to the present invention.

Each variable thruster 40 installed at the stern side of the floating offshore plant 20 can be configured as illustrated in Fig.

Referring to FIG. 6, the variable thruster 40 has a propeller 43 inside a duct 42, is coupled to the bottom of the hull through a support 41, drives the motor to support the support 41 The duct 42 and the propeller 43 are rotated in the left and right direction by a corresponding angle so as to adjust the propulsion direction so that the drive shaft provided in the support table 41 is rotated by the motor And the propeller 43 is rotated to generate propulsive force in the forward and backward directions as illustrated by the arrow B or arrow B 'so as to adjust the propelling direction of the propeller 42 in the left and right direction of the ship, To generate forward and backward propulsive forces.

The configuration of the propulsion control system for a floating offshore plant according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the technical idea of the present invention.

20: Floating marine plant
40: variable thruster
50: Turret
110:
120:
130: Propulsion control unit
141, 142: thruster driving unit

Claims (7)

A detector for detecting the current position and the sea condition of the ship;
A propulsion control unit for determining whether to move the ship based on the sea state detected by the detection unit and generating a control signal for propelling the ship based on the current position of the ship when the movement of the ship is determined; And
And a thruster driving unit for driving a stern side thruster that provides thrust according to a control signal generated from the propulsion control unit to move the hull.
The method according to claim 1,
Wherein:
A gyro compass for detecting azimuth information;
A wind sensor for detecting wind direction and velocity information;
A current sensor for detecting direction and velocity information of the current; And
And a GPS signal receiving unit for receiving GPS (Global Positioning System) signals from the satellite.
3. The method of claim 2,
The propulsion control unit includes:
A monitoring unit for determining a sea state based on wind direction and speed information from the wind sensor and a current direction and speed information from the current sensor and determining whether the ship is moving according to a sea state; And
When the hull is determined to be moving, the current position of the hull is detected by the orientation information from the gyro compass and the GPS signal from the GPS signal receiving unit, and based on the difference between the current position of the hull and the predetermined target position, And a control unit for controlling the operation of the propulsion control system for a floating offshore plant.
The method of claim 3,
Wherein the operation unit transmits a hull movement request to an external monitoring server and receives a target position in a good resolution state by the manager in response thereto.
The method of claim 3,
The target position is selected at any point outside the predefined radius of influence from the current position of the hull, the closest point among the plurality of previously registered candidate points, And a coastal side mooring point. The propulsion control system for a floating offshore plant according to claim 1,
The method according to claim 1,
The thruster driver includes:
Wherein each of the motors for driving the two stern-type variable thrusters is selectively and variable-speed-controlled in accordance with a control signal output from the propulsion control unit, and the hull is moved to a predetermined target position while adjusting a propulsion direction and a propulsion speed. Propulsion control system for a floating offshore plant.
The method according to claim 6,
In the variable thruster,
The propeller is mounted on the stern side, and a propeller is provided inside the duct. The propeller is coupled to the bottom of the hull through a support base. The propeller is rotated by driving the motor to adjust the duct and the propeller in the left- And the driving shaft provided in the support is driven by a motor to rotate the propeller so as to generate propulsive forces in the forward and backward directions.
KR1020150150781A 2015-10-29 2015-10-29 Propulsion control system for floating offshore plant KR20170049893A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107368028A (en) * 2017-08-22 2017-11-21 姚静洁 A kind of electric propulsion control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107368028A (en) * 2017-08-22 2017-11-21 姚静洁 A kind of electric propulsion control system

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