CN113879475A - Dynamic ballast adjusting device and method for offshore wind power generation platform - Google Patents

Abstract

The invention relates to a dynamic ballast adjusting device and method for an offshore wind power generation platform. When the platform foundation inclines, the floating state sensors can timely acquire the inclination angle of the platform foundation and send the inclination angle to the controller, each liquid level sensor can synchronously detect the liquid level height of the corresponding adjustable ballast tank and send the liquid level height to the controller, and the specific load adjusting mode of each adjustable ballast tank is judged according to the inclination angle of the platform foundation and the liquid level height of each adjustable ballast tank. In addition, each adjustable ballast tank can be synchronously and independently adjusted, namely when one adjustable ballast tank is used for exhausting and adding water, the other adjustable ballast tank is synchronously used for aerating and draining water, so that each adjustable ballast tank can be synchronously and dynamically adjusted in time, the platform foundation can be quickly adjusted to the optimal position, the stability of the platform foundation on the sea surface can be improved, and the power generation efficiency can be improved.

Description

Dynamic ballast adjusting device and method for offshore wind power generation platform

Technical Field

The invention relates to the technical field of offshore wind power generation, in particular to a dynamic ballast adjusting device and method for an offshore wind power generation platform.

Background

Conventional floating wind power platforms have a foundation form including a mono-column type, a semi-submersible type, a tension leg type, and a barge damping pool type. The semi-submersible and barge damping pool type platform foundation mainly obtains enough stability through larger water plane inertia distance to resist marine environmental loads, particularly wind tilting moment applied to a fan. The upsizing of offshore wind turbines also tends to result in an increasing overturning moment on the platform foundation under the action of wind loads. In order to ensure that the static inclination angle (or average inclination angle) of the platform can be kept within the allowable range of the fan when the fan operates, ensure the stable operation of a generator set and the generating efficiency of the fan, higher requirements are provided for the stability of a basic platform.

In general, for foundations of two floating wind power generation platforms, namely a semi-submersible type floating wind power generation platform and a barge damping pool floating type floating wind power generation platform, two solutions are generally available in the face of the technical challenge that the floating foundation platform is required to maintain a small static inclination angle while the overturning moment is continuously increased due to the large-scale wind turbine: the first method is that the static restoring moment arm of the platform is increased by increasing the waterplane inertia moment of the platform and/or reducing the gravity center, so that the static water rigidity and stability of the platform are improved; the second is to balance the overturning moment brought by the fan by dynamically adjusting the ballast of the platform to generate a counter moment. However, the stability of the wind turbine on the basis of the floating wind power generation platform cannot be guaranteed, and when the attitude of the wind turbine deviates, the power generation efficiency of the wind turbine is greatly reduced.

Disclosure of Invention

Based on the above, it is necessary to overcome the defects of the prior art, and provide a dynamic ballast adjusting device and an adjusting method thereof for an offshore wind power generation platform, which can improve the stability and ensure higher power generation efficiency.

The technical scheme is as follows: a dynamic ballast adjustment apparatus for an offshore wind power generation platform, the dynamic ballast adjustment apparatus comprising: a platform foundation having at least three adjustable ballast tanks; the air compressor comprises at least three air inlet pipes, first switch valves and an air compressor unit, wherein the number of the air inlet pipes and the number of the first switch valves are at least three, one ends of the at least three air inlet pipes are communicated with the at least three adjustable ballast tanks in a one-to-one correspondence mode, the other ends of the at least three air inlet pipes are communicated with an air outlet of the air compressor unit, and the at least three first switch valves are arranged on the at least three air inlet pipes in a one-to-one correspondence mode and used for controlling the on-off of the air inlet pipes; the exhaust pipes and the second switch valves are at least three, one ends of at least three exhaust pipes are communicated with at least three adjustable ballast tanks in a one-to-one correspondence mode, the other ends of at least three exhaust pipes are used for being communicated with the external environment, and at least three second switch valves are arranged on at least three exhaust pipes in a one-to-one correspondence mode and used for controlling the on-off of the exhaust pipes; the water pipes and the third switch valves are at least three, one ends of the at least three water pipes are communicated with the bottoms of the at least three adjustable ballast tanks in a one-to-one correspondence manner, the other ends of the at least three water pipes are used for being communicated with the marine environment, and the at least three switch valves are arranged on the at least three water pipes in a one-to-one correspondence manner; the ballast tank comprises at least three liquid level sensors, floating state sensors and a controller, wherein the at least three liquid level sensors are correspondingly arranged in at least three adjustable ballast tanks one by one, and the liquid level sensors are used for detecting the liquid level heights of the corresponding adjustable ballast tanks; the floating state sensor is arranged on the platform foundation and is used for acquiring the inclination angle of the platform foundation; the controller is respectively electrically connected with the first switch valve, the second switch valve, the third switch valve, the liquid level sensor and the floating state sensor.

In the process that the dynamic ballast adjusting device of the offshore wind power generation platform works on the sea surface, when the platform foundation inclines due to the influence of wind force in an external environment, for example, the floating state sensor can timely acquire the inclination angle of the platform foundation and send the inclination angle to the controller, each liquid level sensor can synchronously detect the liquid level height of the corresponding adjustable ballast tank and send the liquid level height to the controller, and the controller correspondingly judges the specific load adjusting mode of each adjustable ballast tank according to the inclination angle of the platform foundation and the liquid level height of each adjustable ballast tank. For example, when the position of the first column where the adjustable ballast tank is located is relatively high, the adjustable ballast tank is enabled to perform air exhaust and water adding actions, that is, the first switch valve corresponding to the adjustable ballast tank is controlled to be closed, and the second switch valve and the third switch valve are controlled to be opened, so that air in the adjustable ballast tank is discharged outwards through the exhaust pipe, and external seawater synchronously enters the adjustable ballast tank through the water pipe; on the contrary, for example, when the position of the first column where the adjustable ballast tank is located is relatively low, the adjustable ballast tank is enabled to perform gas filling and water draining actions, that is, the first switch valve and the third switch valve corresponding to the adjustable ballast tank are both controlled to be opened and the second switch valve is controlled to be closed, so that air in the adjustable ballast tank enters the adjustable ballast tank through the gas inlet pipe, and ballast water in the adjustable ballast tank is synchronously discharged to sea water through the water pipe under the compression action of the air. Therefore, the stability of the offshore wind power generation platform on the sea surface can be improved by timely dynamically adjusting each adjustable ballast tank, and the power generation efficiency can be further improved.

In addition, each adjustable ballast tank is provided with an air inlet pipe, a first switch valve, an exhaust pipe, a second switch valve, a water pipe, a third switch valve and other accessories, each adjustable ballast tank can synchronously perform adjustment actions, namely when one adjustable ballast tank performs the actions of exhausting and adding water, the other adjustable ballast tank synchronously performs the actions of air-entrapping and water-discharging, so that each adjustable ballast tank can be synchronously and dynamically adjusted in time, the stability of the platform foundation on the sea surface can be improved, and the power generation efficiency can be improved.

In one embodiment, the platform foundation is a semi-submersible foundation comprising at least three first columns; at least three adjustable ballast tanks are arranged in the at least three first upright posts in a one-to-one correspondence manner.

In one embodiment, the semi-submersible foundation further comprises a second column; the second upright post is used for supporting the fan and is arranged in the area surrounded by at least three first upright posts or on the boundary.

In one embodiment, at least one longitudinal oscillation plate and/or at least one transverse oscillation plate is disposed within the adjustable ballast tank.

In one embodiment, the platform foundation is a barge damping pool foundation, and the barge damping pool foundation is provided with a plurality of compartments, and the number of the compartments is not less than the number of at least three adjustable ballast compartments; at least three adjustable ballast tanks are disposed in one-to-one correspondence in at least three of the plurality of compartments.

In one embodiment, the air compressor assembly includes an air compressor and an air compression tank connected to the air compressor; the air compression tank is communicated with the air inlet pipe; the air compressor unit is arranged at the bottom of the fan tower of the platform foundation and inside a cabin on a first deck or a second deck.

In one embodiment, the number of the air compressor units is at least three, and the at least three air compressor units are communicated with the at least three air inlet pipes in a one-to-one correspondence manner; or, the number of the air compressor units is one, and the air compressor units are respectively communicated with at least three air inlet pipes.

In one embodiment, the dynamic ballast adjustment device of the offshore wind power generation platform further comprises at least three air pressure sensors and a low-pass filtering unit; the at least three air pressure sensors are arranged in the at least three adjustable ballast tanks in a one-to-one correspondence manner, and are used for sensing the air pressure in the corresponding adjustable ballast tanks; the floating state sensor is also used for acquiring the draught position of the platform foundation; the air pressure sensor and the floating state sensor are both electrically connected with the low-pass filtering unit; the low-pass filtering unit is electrically connected with the controller.

In one embodiment, the controller is provided with a signal transceiving module; the signal receiving and transmitting module is used for being electrically connected with the remote terminal.

The adjusting method of the dynamic ballast adjusting device of the offshore wind power generation platform comprises the following steps:

acquiring the inclination angle of a platform foundation and the ballast water level of each adjustable ballast tank;

controlling an air compressor unit corresponding to at least one adjustable ballast tank at the downward inclined part of the platform foundation to work according to the inclination angle of the platform foundation and the ballast water liquid level of each adjustable ballast tank, wherein the corresponding first switch valve is opened, and the corresponding third switch valve is opened, so that at least one adjustable ballast tank at the downward inclined part of the platform foundation is inflated and ballast water is discharged; and synchronously controlling the opening of a second switch valve corresponding to at least one adjustable ballast tank at the upward inclined part of the platform foundation and the opening of a corresponding third switch valve, so that at least one adjustable ballast tank at the upward inclined part of the platform foundation is exhausted and ballast water is added.

According to the adjusting method of the dynamic ballast adjusting device of the offshore wind power generation platform, the inclination angle of the platform foundation and the ballast water liquid level of the adjustable ballast tank are detected in real time, corresponding adjustment is timely made according to the detection result, namely a certain amount of ballast water in at least one adjustable ballast tank at the downward inclination part of the platform foundation is discharged, meanwhile, at least one adjustable ballast tank at the upward inclination part of the platform foundation sucks a certain amount of ballast water, and the total amount of the ballast water is kept unchanged before and after the adjusting process. Therefore, the restoring moment for offsetting the average overturning moment borne by the platform foundation at present can be generated, so that the offshore floating type wind power generation platform is always kept in the optimal transverse/longitudinal inclination angle range of the wind power generation unit under the action of different wind directions and wind speeds, and the optimization of the platform power generation efficiency is facilitated.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a dynamic ballast adjustment apparatus of an offshore wind power generation platform according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a dynamic ballast adjustment apparatus of an offshore wind power generation platform according to another embodiment of the present invention;

FIG. 3 is a top view of a platform foundation according to an embodiment of the present invention including three first uprights;

FIG. 4 is a top view of a platform foundation according to an embodiment of the present invention including three first columns and three second columns;

FIG. 5 is a schematic structural diagram of a platform foundation according to an embodiment of the present invention, which is suitable for a barge damping pool type offshore wind power generation platform;

fig. 6 is a schematic structural diagram of a platform foundation according to another embodiment of the present invention, which is suitable for a barge damping pool type offshore wind power generation platform.

10. A dynamic ballast adjusting device of the offshore wind power generation platform; 11. a platform foundation; 111. an adjustable ballast tank; 112. a first upright post; 113. a first cross brace; 114. a second upright post; 115. a second cross brace; 116. a damping pool structure; 12. an air inlet pipe; 121. a first on-off valve; 13. an air compressor unit; 14. an exhaust pipe; 141. a second on-off valve; 15. a water pipe; 151. a third on-off valve; 16. a manifold.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 or 2, fig. 1 shows a schematic structural diagram of a dynamic ballast adjusting device 10 of an offshore wind power generation platform according to an embodiment of the present invention, and fig. 2 shows a schematic structural diagram of a dynamic ballast adjusting device 10 of an offshore wind power generation platform according to another embodiment of the present invention. According to an embodiment of the present invention, a dynamic ballast adjusting device 10 for an offshore wind turbine platform is provided, where the dynamic ballast adjusting device 10 for an offshore wind turbine platform includes: the air compressor comprises a platform base 11, an air inlet pipe 12, a first switch valve 121, an air compressor unit 13, an air outlet pipe 14, a second switch valve 141, a water pipe 15, a third switch valve 151, a liquid level sensor (not shown), a floating state sensor (not shown) and a controller (not shown). The platform foundation 11 is, for example, a semi-submersible foundation, and is provided with at least three adjustable ballast tanks 111. The number of the inlet pipes 12 and the number of the first switch valves 121 are at least three, one end of each of the at least three inlet pipes 12 is communicated with the at least three adjustable ballast tanks 111 in a one-to-one correspondence manner, and the other end of each of the at least three inlet pipes 12 is communicated with an air outlet of the air compressor unit 13. The at least three first switch valves 121 are disposed on the at least three intake pipes 12 in a one-to-one correspondence manner, and are used for controlling on/off of the intake pipes 12. The number of the exhaust pipes 14 and the number of the second switch valves 141 are at least three, one end of each of the at least three exhaust pipes 14 is communicated with the at least three adjustable ballast tanks 111 in a one-to-one correspondence manner, and the other end of each of the at least three exhaust pipes 14 is used for being communicated with the external environment. The at least three second switch valves 141 are disposed on the at least three exhaust pipes 14 in a one-to-one correspondence manner, and are used for controlling on/off of the exhaust pipes 14. The number of the water pipes 15 and the number of the third on-off valves 151 are at least three, one end of each of the at least three water pipes 15 is correspondingly communicated with the bottoms of the at least three adjustable ballast tanks 111, and the other ends of the at least three water pipes 15 are used for being communicated with the marine environment. The at least three third on/off valves 151 are disposed on the at least three water pipes 15 in a one-to-one correspondence. The number of the liquid level sensors is at least three, and the at least three liquid level sensors are correspondingly arranged in the at least three adjustable ballast tanks 111. The level sensor is used to detect the level of the corresponding adjustable ballast tank 111. The floating state sensor is arranged on the platform foundation 11 and used for acquiring the inclination angle of the platform foundation 11. The controller is electrically connected with the first switch valve 121, the second switch valve 141, the third switch valve 151, the liquid level sensor and the floating state sensor respectively.

Specifically, the end of the intake pipe 12 is disposed in communication with the top of the adjustable ballast tank 111. The end of the exhaust pipe 14 is communicatively disposed at the top of the adjustable ballast tank 111. Thus, the first switch valve 121 is positioned at the top of the adjustable ballast tank 111, so that the gas can be conveniently introduced into the adjustable ballast tank 111 when opened, and the gas in the adjustable ballast tank 111 can be conveniently discharged to the outside of the adjustable ballast tank 111 when the second switch valve 141 is opened. It is understood that the end of the inlet pipe 12 may be disposed in communication with other parts of the adjustable ballast tank 111, and is not limited herein, and may be disposed according to actual requirements. Similarly, the end of the outlet pipe may be connected to another part of the adjustable ballast tank 111, and may be provided according to actual circumstances without limitation.

In the process that the dynamic ballast adjusting device 10 of the offshore wind power generation platform works on the sea surface, when the platform foundation 11 inclines due to the influence of wind force in the external environment, for example, the floating state sensors can timely acquire the inclination angle of the platform foundation 11 and send the inclination angle to the controller, each liquid level sensor can synchronously detect the liquid level height of the corresponding adjustable ballast tank 111 and send the liquid level height to the controller, and the controller correspondingly judges the specific load adjusting mode of each adjustable ballast tank 111 according to the inclination angle of the platform foundation 11 and the liquid level height of each adjustable ballast tank 111. For example, when the position of the first column 112 where the adjustable ballast tank 111 is located is relatively high, the adjustable ballast tank 111 is made to perform the actions of exhausting and adding water, that is, the first switch valve 121 corresponding to the adjustable ballast tank 111 is controlled to be closed, and the second switch valve 141 and the third switch valve 151 are controlled to be both opened, so that the air in the adjustable ballast tank 111 is exhausted outwards through the exhaust pipe 14, and the external seawater synchronously enters the adjustable ballast tank 111 through the water pipe 15; conversely, for example, when the position of the first column 112 where the adjustable ballast tank 111 is located is relatively low, the adjustable ballast tank 111 is caused to perform air-filling and water-draining actions, that is, the first switch valve 121 and the third switch valve 151 corresponding to the adjustable ballast tank 111 are both controlled to be opened and the second switch valve 141 is controlled to be closed, so that the air in the adjustable ballast tank 111 enters the adjustable ballast tank 111 through the air inlet pipe 12, and the ballast water in the adjustable ballast tank 111 is synchronously discharged to the sea water through the water pipe 15 under the pressure of the air. In this way, by dynamically adjusting each adjustable ballast tank 111 in time, the offshore wind turbine platform can always keep floating under the action of constantly changing marine environmental loads, and the power generation efficiency can be further improved.

In addition, since each of the adjustable ballast tanks 111 is provided with the air inlet pipe 12, the first on-off valve 121, the air outlet pipe 14, the second on-off valve 141, the water pipe 15, the third on-off valve 151, and the like, the adjustable ballast tanks 111 can be adjusted simultaneously and independently. When one of the adjustable ballast tanks 111 is used for exhausting and adding water, the other adjustable ballast tank 111 is used for synchronously carrying out gas filling and water discharging, so that each adjustable ballast tank 111 can be synchronously and dynamically adjusted in time, the platform foundation 11 can be quickly adjusted to the optimal position, the stability of the platform foundation 11 on the sea surface can be improved, and the power generation efficiency can be improved.

In addition, in the first, second, and third on-off valves 121, 141, and 151 corresponding to any one of the adjustable ballast tanks 111, the second and third on-off valves 141 and 151 are normally in a normally closed state. Further, the first switching valve 121 and the second switching valve 141 are not opened at the same time.

Referring to fig. 1, 3 and 4, in one embodiment, the platform foundation 11 is a semi-submersible foundation, and the platform foundation 11 includes at least three first columns 112. At least three adjustable ballast tanks 111 are disposed inside at least three first columns 112 in a one-to-one correspondence. Thus, because each first upright column 112 is provided with the air inlet pipe 12, the first switch valve 121, the exhaust pipe 14, the second switch valve 141, the water pipe 15, the third switch valve 151 and other accessories, in the production process, the first upright column 112 and the related accessories can be combined together firstly, and each first upright column 112 is assembled together when being transported to the sea, so that the transportation operation and the assembly operation of the platform foundation 11 can be facilitated, the damage in the transportation process can be avoided, the independence is strong, and the working efficiency is high. Meanwhile, the ballast water pipe 15 systems of the adjustable ballast tanks 111 are mutually independent, so that the complicated arrangement of the ballast water pipes 15 among the upright post units is avoided, and the construction and operation and maintenance cost is greatly reduced. In addition, because the adjustable ballast tanks 111 are arranged inside each first upright column 112, that is, the height position of each first upright column 112 on the sea surface can be flexibly adjusted, the stability of the platform foundation 11 on the sea surface can be improved, and the power generation efficiency can be further improved.

It should be noted that the number of the first columns 112 included in the platform base 11 is, for example, three, four, five or other numbers, and is not limited herein.

It should be understood that the number of first columns 112 and adjustable ballast tanks 111 is not limited to a one-to-one correspondence, in other words, it is not necessary to provide an adjustable ballast tank 111 inside each first column 112. As an example, when the number of the first columns 112 is six, for example, the number of the adjustable ballast tanks 111 is three, wherein three first columns 112 are provided with one adjustable ballast tank 111, and the remaining three first columns 112 may not be provided with the adjustable ballast tanks 111, and the three first columns 112 provided with the adjustable ballast tanks 111 are arranged alternately with the three first columns 112 not provided with the adjustable ballast tanks 111. For another example, when the number of the first columns 112 is eight, the number of the adjustable ballast tanks 111 is four, wherein four first columns 112 are provided with one adjustable ballast tank 111, the remaining four first columns 112 may not be provided with the adjustable ballast tanks 111, and the four first columns 112 provided with the adjustable ballast tanks 111 are arranged alternately with the four first columns 112 not provided with the adjustable ballast tanks 111.

Referring to fig. 1, 3 and 4, in one embodiment, the platform foundation 11 further includes at least three first cross braces 113. At least three first cross braces 113 are connected between two adjacent first upright posts 112 in a one-to-one correspondence manner.

Referring to fig. 1 and 4, in an embodiment, the platform foundation 11 further includes a second upright 114, and the second upright 114 is used for supporting the wind turbine and disposed inside or on the boundary of the area surrounded by the at least three first uprights 112. Wherein, adjustable ballast tank may not be arranged in the second column 114, and adjustable ballast tank may also be provided, and the setting may be performed according to actual requirements.

Further, the platform foundation 11 further includes at least three second wales 115. The second upright posts 114 are respectively connected with one ends of at least three second cross braces 115, and the other ends of the at least three second cross braces 115 are correspondingly connected with the at least three first upright posts 112.

It should be noted that, the cross sections of the first upright column 112 and the second upright column 114 are, for example, circular cross sections, but in other embodiments, the cross sections of the first upright column 112 and the second upright column 114 may also be, but are not limited to, square, chamfered square, or polygonal, and may be set according to actual requirements.

Referring to fig. 5 or 6, in one embodiment, the platform foundation 11 is embodied as a barge damping pool type foundation, and the platform foundation 11 is provided with a plurality of compartments (not shown). The number of the plurality of compartments is not less than the number of the at least three adjustable ballast tanks 111. At least three adjustable ballast tanks 111 are arranged in a one-to-one correspondence in at least three of the plurality of compartments.

Specifically, at least three adjustable ballast tanks 111 are arranged in a one-to-one correspondence in at least three compartments that are not on the same straight line near the bow and stern sides. Therefore, the inclination angle of the platform foundation 11 can be adjusted, the stability of the offshore wind power generation platform on the sea surface is improved, and the power generation efficiency is not influenced.

As shown in fig. 5 and fig. 6, the platform foundation 11 is suitable for a barge damping pool type offshore wind power generation platform, the damping pool structure 116 is arranged in the middle of the platform foundation 11, and the peripheral part is used for arranging a compartment, specifically, a square frame body is provided, but it may be an enclosure frame with other shapes. A specific example of the number of the adjustable ballast tanks 111 is four, and four adjustable ballast tanks 111 are disposed in the four corners of the square frame body or in the middle of each side of the square frame body in a one-to-one correspondence.

It should be understood that fig. 5 and fig. 6 respectively show the arrangement of two types of adjustable ballast tanks 111 on the barge-type floating wind power generation platform, but in other embodiments, the arrangement of the adjustable ballast tanks 111 is not limited to the shown position, and the position meeting the ballast adjustment requirement may be selected and arranged according to the barge shape and cabin division.

In one embodiment, the air compressor package 13 includes an air compressor (not shown) and an air compression tank (not shown) connected to the air compressor. The air compression tank communicates with an intake pipe 12. The air compressor unit 13 is disposed inside a nacelle at the bottom of a fan tower of the platform foundation 11, on the first deck or the second deck. Thus, as the air compressor unit 13 is arranged in the cabin at the bottom of the fan tower, on the first deck or on the second deck, a complex bilge water pump system and ballast water pipes 15 between each adjustable ballast tank 111 are not needed, so that the arrangement of the cabin, the channel and related equipment and pipelines of ballast water is greatly simplified, and the construction and operation and maintenance costs of the system are reduced.

It should be noted that the first deck refers to the uppermost deck, which is also called the main deck; the second deck means a deck located below the first deck.

In a specific embodiment, at least three air compressor sets 13 are respectively arranged in the mechanical places on the second deck of the platform base 11 in a one-to-one correspondence manner, so that the arrangement of cabins and stairways of the platform can be simplified to the maximum extent, and the maintenance cost of the equipment is reduced.

Referring to fig. 1, in one embodiment, there are at least three air compressor sets 13, and the at least three air compressor sets 13 are in one-to-one communication with the at least three air inlet pipes 12. In this way, when the number of the air compressor sets 13 is at least three, that is, the gas is delivered to the interiors of the at least three adjustable ballast tanks 111 through the at least three intake pipes 12 in a one-to-one correspondence by the at least three air compressor sets 13.

Referring to fig. 2, in another embodiment, there is one air compressor set 13, and the air compressor sets 13 are respectively communicated with at least three air inlet pipes 12. That is, only one air compressor unit 13 may be centrally disposed, that is, the air compressor unit 13 is respectively communicated with at least three air inlet pipes 12, for example, through a compressed air main pipe 16, and the air can be supplied to each of the adjustable ballast tanks 111. In this embodiment, although the compressed air main pipe 16 is added, the number of compressed air units is reduced, the arrangement of the upright post machinery is simplified, and the compressed air upright post is suitable for sites with more gradual sea state changes.

In one embodiment, dynamic ballast adjustment apparatus 10 of an offshore wind power generation platform further comprises at least three air pressure sensors (not shown in the figures). The at least three air pressure sensors are correspondingly arranged in the at least three adjustable ballast tanks 111, and the air pressure sensors are used for sensing the air pressure in the corresponding adjustable ballast tanks 111. The air pressure sensor is electrically connected with the controller. In addition, it should be noted that the floating state sensor is also used for acquiring the draft position of the platform foundation 11, so as to control the total ballast water amount before and after the load adjustment process to be constant and the platform draft to be constant.

Further, an air pressure sensor and a liquid level sensor are arranged in each adjustable ballast tank 111, and the air pressure and the ballast water liquid level in each adjustable ballast tank 111 are monitored in real time, so that the height difference between the ballast water liquid level in each adjustable ballast tank 111 and the opening of the ballast water pipe 15 is maintained above a minimum design value, and the air pressure does not exceed the maximum design pressure value. As an example, the pressure in the adjustable ballast tank 111 does not exceed 3.0bar and the ballast water level is no higher than 90% of the tank depth, nor lower than 10% of its depth. As a specific example, the pressure within the adjustable ballast tank 111 may be maintained at about 2.0bar to 2.5bar when no ballast is being applied to ensure a quick response when ballast water needs to be removed.

In one embodiment, the dynamic ballast adjustment apparatus 10 of the offshore wind power generation platform further comprises a low pass filtering unit (not shown in the figures). The air pressure sensor and the floating state sensor are both electrically connected with the low-pass filtering unit. The low-pass filtering unit is electrically connected with the controller. The low-pass filtering unit filters the measured liquid level height signal, the measured inclination angle signal and the pressure signal in the adjustable ballast tank 111, and feeds back the result after filtering processing to the controller, and the controller correspondingly controls the first switch valve, the second switch valve and the third switch valve to work according to the result feedback.

It should be noted that, in order to eliminate the short-term platform attitude change caused by the periodic oscillation motion of the offshore wind turbine platform and the transient environmental disturbance to the maximum extent, the parameters set by the low-pass filter unit may be optimized according to the marine environmental characteristics of the platform operating site, so that, for example, when the inclination angle of the platform foundation 11 sensed by the floating sensor exceeds the preset threshold range, the controller controls the corresponding switches to operate, and when the sensed inclination angle of the platform foundation 11 is within the preset threshold range, the original operating state of each switch is maintained, thereby avoiding the frequent response of the controller and ensuring the active regulation efficiency.

In one embodiment, the controller is provided with a signal transceiving module. The signal receiving and transmitting module is used for being electrically connected with the remote terminal. Specifically, the remote terminal is, for example, an electronic control device such as a mobile phone, a computer, a tablet, and the like. Therefore, signals are transmitted between the remote terminal and the controller, on one hand, real-time state signals measured by the sensor are transmitted to the remote terminal, and the working state of the offshore wind power generation platform can be mastered in time; on the other hand, the remote controller can be remotely controlled to execute the operation instruction of the remote terminal to each switch valve, so that the remote manual ballast water transfer operation and the floating state adjustment operation are realized.

Specifically, the adjustable ballast tank 111 is specifically disposed at the bottom portion of the platform foundation 11, for example, so that the position of the platform foundation 11 can be dynamically adjusted, and the adjustment effect is good. Specifically, for first column 112, adjustable ballast tank 111 is disposed at the bottom end of first column 112, for example, and the bottom end of first column 112 is located below the sea surface, and the center of gravity is low, so as to facilitate dynamic adjustment of the position of first column 112; in addition, the water inside the adjustable ballast tank 111 may be directly discharged to the outside through the water pipe 15 into the seawater, or the seawater may be directly guided to the inside of the adjustable ballast tank 111 through the water pipe 15.

The driving modes of the first switching valve 121, the second switching valve 141, and the third switching valve 151 are not limited, and may be, for example, solenoid valves, hydraulic valves, pneumatic valves, or the like.

It should also be noted that the specific shape of the adjustable ballast tank 111 is the compartment division that meets the air tightness requirement, and the shape is determined by the shape and arrangement position of the platform. In some embodiments, the adjustable ballast tank 111 is embodied as a pressure-tight structure, including but not limited to spherical, cylindrical or prismatic tanks with flat, hemispherical or dished ends, and the like.

In some embodiments, to ensure that ballast water sloshing within the adjustable ballast tank 111 does not adversely affect the ballast balance adjustment process when the floating platform is subjected to vigorous rocking motion, the bottom of the adjustable ballast tank 111 is provided with, for example, at least one horizontal slosh plate having an open porosity. In this case, the lowest level limit of ballast water in the adjustable ballast tank 111 is located at the oscillation stop plate.

In some embodiments, at least one longitudinal and/or at least one transverse oscillation plate, for example, is disposed within each adjustable ballast tank 111 to avoid free level sloshing effects from affecting ballast adjustment control.

In some embodiments, platform foundation 11 further includes a fixed ballast tank disposed below adjustable ballast tank 111. For the purpose of minimizing the center of gravity of the floating wind power platform, the adjustable ballast tank 111 should be disposed as close to the baseline, i.e., close to the upper surface of the fixed ballast tank.

It should be noted that the adjustable ballast tank 111 is adjustable, which means that the ballast water in the tank can be discharged outwards or pumped inwards, so as to adjust the buoyancy. The fixation of the fixed ballast tank means that the weight of ballast water cannot be adjusted in the tank, and the tank of the fixed ballast tank is loaded with a certain amount of solid or fluid with a large specific gravity such as cement, iron ore sand or barite slurry as fixed ballast.

In one embodiment, an offshore wind power platform comprises the dynamic ballast adjustment apparatus 10 of any of the above embodiments.

It should be noted that the offshore wind power generation platform can be a stand column stable offshore wind power generation platform, and can also be a barge damping pool offshore wind power generation platform.

Since the offshore wind power generation platform comprises the dynamic ballast adjusting device 10 of the offshore wind power generation platform, the technical effect of the offshore wind power generation platform is brought by the dynamic ballast adjusting device 10 of the offshore wind power generation platform, and the beneficial effects of the offshore wind power generation platform are the same as those of the dynamic ballast adjusting device 10 of the offshore wind power generation platform, and are not described herein again.

In one embodiment, a method for adjusting the dynamic ballast adjustment apparatus 10 of the offshore wind power generation platform of any of the above embodiments comprises the steps of:

acquiring the inclination angle of the platform foundation 11 and the ballast water level of each adjustable ballast tank 111;

controlling the air compressor unit 13 corresponding to at least one adjustable ballast tank 111 at the downward inclined part of the platform foundation 11 to work according to the inclination angle of the platform foundation 11 and the ballast water level of each adjustable ballast tank 111, wherein the corresponding first switch valve 121 is opened, and the corresponding third switch valve 151 is opened, so that at least one adjustable ballast tank 111 at the downward inclined part of the platform foundation 11 is inflated and ballast water is discharged; the second on-off valve 141 corresponding to the at least one adjustable ballast tank 111 at the upward-inclination portion of the platform base 11 is synchronously controlled to be opened, and the corresponding third on-off valve 151 is controlled to be opened, so that the at least one adjustable ballast tank 111 at the upward-inclination portion of the platform base 11 is vented and ballast water is added.

According to the adjusting method of the dynamic ballast adjusting device 10 of the offshore wind power generation platform, the inclination angle of the platform foundation 11 and the ballast water liquid level of the adjustable ballast tank 111 are detected in real time, and corresponding adjustment is timely made according to the detection result, namely a certain amount of ballast water in at least one adjustable ballast tank 111 at the downward inclination part of the platform foundation 11 is discharged, and meanwhile a certain amount of ballast water is sucked into at least one adjustable ballast tank 111 at the upward inclination part of the platform foundation 11, so that a return moment for offsetting the current average overturning moment borne by the platform foundation 11 can be generated, the offshore wind power generation platform is always kept in the optimal transverse/longitudinal inclination angle range of the wind power generation set under the action of different wind directions and wind speeds, and optimization of the platform power generation efficiency is facilitated.

In an embodiment, the method for adjusting the dynamic ballast adjusting apparatus 10 of the offshore wind turbine platform further includes the following steps: the pressure level of each of the adjustable ballast tanks 111 is monitored, the inlet pressure and inlet flow rate are controlled so that the pressure level within the adjustable ballast tanks 111 does not exceed a design limit, and so that the average ballast water level is not below a minimum water level requirement.

In addition, during the adjusting process, the total amount of discharged ballast water and the total amount of sucked ballast water keep dynamic balance, and the average draught of the platform is ensured to be unchanged.

In some embodiments, the dynamic ballast adjustment system may be used not only for adjusting the floating state of the platform under in-situ conditions, but also for adjusting the floating state during launching, towing and installation of the platform foundation, and also for adjusting the platform to a specified inclination angle during an inclination test of the platform foundation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. A dynamic ballast adjustment device for an offshore wind power generation platform, the dynamic ballast adjustment device comprising:

a platform foundation having at least three adjustable ballast tanks;

the air compressor comprises at least three air inlet pipes, first switch valves and an air compressor unit, wherein the number of the air inlet pipes and the number of the first switch valves are at least three, one ends of the at least three air inlet pipes are communicated with the at least three adjustable ballast tanks in a one-to-one correspondence mode, the other ends of the at least three air inlet pipes are communicated with an air outlet of the air compressor unit, and the at least three first switch valves are arranged on the at least three air inlet pipes in a one-to-one correspondence mode and used for controlling the on-off of the air inlet pipes;

the exhaust pipes and the second switch valves are at least three, one ends of at least three exhaust pipes are communicated with at least three adjustable ballast tanks in a one-to-one correspondence mode, the other ends of at least three exhaust pipes are used for being communicated with the external environment, and at least three second switch valves are arranged on at least three exhaust pipes in a one-to-one correspondence mode and used for controlling the on-off of the exhaust pipes;

the water pipes and the third switch valves are at least three, one ends of the at least three water pipes are communicated with the bottoms of the at least three adjustable ballast tanks in a one-to-one correspondence manner, the other ends of the at least three water pipes are used for being communicated with the marine environment, and the at least three switch valves are arranged on the at least three water pipes in a one-to-one correspondence manner;

the ballast tank comprises at least three liquid level sensors, floating state sensors and a controller, wherein the at least three liquid level sensors are correspondingly arranged in at least three adjustable ballast tanks one by one, and the liquid level sensors are used for detecting the liquid level heights of the corresponding adjustable ballast tanks; the floating state sensor is arranged on the platform foundation and is used for acquiring the inclination angle of the platform foundation; the controller is respectively electrically connected with the first switch valve, the second switch valve, the third switch valve, the liquid level sensor and the floating state sensor.

2. The dynamic ballast adjustment device of an offshore wind power generation platform of claim 1, wherein said platform foundation is a semi-submersible foundation comprising at least three first columns; at least three adjustable ballast tanks are arranged in the at least three first upright posts in a one-to-one correspondence manner.

3. The offshore wind power platform dynamic ballast adjustment device of claim 2, wherein the semi-submersible foundation further comprises a second column; the second upright post is used for supporting the fan and is arranged in the area surrounded by at least three first upright posts or on the boundary.

4. The offshore wind power platform dynamic ballast adjustment device of claim 1, wherein at least one longitudinal oscillation plate and/or at least one transverse oscillation plate is arranged within the adjustable ballast tank.

5. The dynamic ballast adjustment apparatus of offshore wind power generation platform of claim 1, wherein said platform foundation is a barge damping pool foundation, said barge damping pool foundation being provided with a plurality of compartments, the number of said compartments being not less than the number of at least three of said adjustable ballast tanks; at least three adjustable ballast tanks are disposed in one-to-one correspondence in at least three of the plurality of compartments.

6. The offshore wind power platform dynamic ballast adjustment device of claim 1, wherein the air compressor assembly comprises an air compressor and an air compression tank connected to the air compressor; the air compression tank is communicated with the air inlet pipe; the air compressor unit is arranged at the bottom of the fan tower of the platform foundation and inside a cabin on a first deck or a second deck.

7. The dynamic ballast adjustment device of an offshore wind power generation platform according to claim 1, wherein the number of the air compressor units is at least three, and at least three air compressor units are in one-to-one communication with at least three air inlet pipes; or, the number of the air compressor units is one, and the air compressor units are respectively communicated with at least three air inlet pipes.

8. The offshore wind power platform dynamic ballast adjustment device of claim 1, further comprising at least three air pressure sensors, and a low pass filter unit; the at least three air pressure sensors are arranged in the at least three adjustable ballast tanks in a one-to-one correspondence manner, and are used for sensing the air pressure in the corresponding adjustable ballast tanks; the floating state sensor is also used for acquiring the draught position of the platform foundation; the air pressure sensor and the floating state sensor are both electrically connected with the low-pass filtering unit; the low-pass filtering unit is electrically connected with the controller.

9. The offshore wind power platform dynamic ballast adjustment device of claim 1, wherein said controller is provided with a signal transceiving module; the signal receiving and transmitting module is used for being electrically connected with the remote terminal.

10. A method of adjusting a dynamic ballast adjustment means of an offshore wind power plant platform according to any of claims 1 to 9, comprising the steps of:

acquiring the inclination angle of a platform foundation and the ballast water level of each adjustable ballast tank;

controlling an air compressor unit corresponding to at least one adjustable ballast tank at the downward inclined part of the platform foundation to work according to the inclination angle of the platform foundation and the ballast water liquid level of each adjustable ballast tank, wherein the corresponding first switch valve is opened, and the corresponding third switch valve is opened, so that at least one adjustable ballast tank at the downward inclined part of the platform foundation is inflated and ballast water is discharged; and synchronously controlling the opening of a second switch valve corresponding to at least one adjustable ballast tank at the upward inclined part of the platform foundation and the opening of a corresponding third switch valve, so that at least one adjustable ballast tank at the upward inclined part of the platform foundation is exhausted and ballast water is added.

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