CN116104713A - Inclination angle measurement and rechecking method of floating wind turbine without yaw structure - Google Patents
Inclination angle measurement and rechecking method of floating wind turbine without yaw structure Download PDFInfo
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- CN116104713A CN116104713A CN202310053600.3A CN202310053600A CN116104713A CN 116104713 A CN116104713 A CN 116104713A CN 202310053600 A CN202310053600 A CN 202310053600A CN 116104713 A CN116104713 A CN 116104713A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses an inclination angle measurement and rechecking method of a floating wind turbine generator without a yaw structure, which comprises the steps of manufacturing a U-shaped piece, tightly attaching the top of the laterally-placed U-shaped piece to the lower end face of a foundation flange in the front-rear direction, welding and fixing, installing two identical double-shaft inclination angle sensors on the installation face of the U-shaped piece, wherein the inclination angle values of the double-shaft inclination angle sensors completely represent the inclination angle of a flange face, installing a suspension bracket at the height of the flange face of a foundation, taking the center of the suspension bracket as the center of a foundation section, suspending a steel wire in the center of the suspension bracket, connecting a suspending drop at the lower end of the steel wire, installing a reference bracket below the suspension bracket, taking the center of the reference bracket as the center of the foundation section, and taking the inclination angles of the two sensors as references when the wind turbine generator runs normally; when the inclination angles of the two sensors deviate, and it is impossible to determine which abnormality, a mechanically stable reference is used as a reference. The invention can accurately finish the inclination angle measurement and rechecking of the floating wind turbine without yaw structure.
Description
Technical Field
The invention relates to the technical field of floating wind turbines, in particular to a method for measuring and rechecking an inclination angle of a floating wind turbine without a yaw structure.
Background
The offshore fixed wind turbine generator system piles the steel structure to the sea bottom in different foundation forms, and the inclination and settlement of the tower can be monitored in real time through equipment, so that the tower is ensured not to incline.
The offshore floating wind turbine generator is different from a fixed wind turbine generator in that: the wind turbine generator is arranged on the floating body, the floating body is connected to the sea bed through the anchor chain, and the floating wind turbine generator floats in a small sea area by means of the gravity of the anchor chain, the friction force between the anchor chain and the sea bed and the holding power between the anchor and the sea bed. Under the combined action of wind and wave currents, the floating wind turbine generator generates multi-degree-of-freedom motion, and the floating body also faces the risk of inclination caused by water leakage caused by the impact of external ships, so that the accuracy requirement of the floating wind turbine generator on inclination angle measurement is very high, if the inclination angle measurement is wrong, when the actual large inclination angle occurs, if the measured value is smaller, the alarm threshold value is not triggered, and the extremely high operation safety risk can occur.
The current dip angle measurement method of the floating wind turbine generator comprises the following steps: after the tower drum is manufactured by a tower drum factory, a tooling is welded at a designated position on the inner wall of the tower drum, when the tower drum, a cabin, blades, a floating body and other equipment are all assembled at a wharf, an inclination sensor is mounted on the tooling, the opportunity of breeze and waves is selected, seawater is injected into the pontoons for leveling, when the draft scales on the outer sides of the three pontoons are consistent, the tower drum is considered to be in a vertical state, then the data of the inclination sensor are read, and if the numerical value of the inclination sensor read at the moment is not 0, the inclination sensor is corrected to 0 degree in a program.
And then dragging the wind turbine to a designated sea area, and when the wind turbine runs, taking the numerical value of the inclination angle sensor as a reference, and sending out an alarm signal when the inclination angle exceeds a set threshold value.
The above method has the following problems:
1. in the water injection leveling process of the three buoys, due to the existence of waves, the draft position of the buoys is not constant, but is in fluctuation, so that accurate and stable draft values are difficult to read; in addition, as the draft scales of the three pontoons are read and recorded by three groups of different personnel, the reading visual angle and the reading method have certain differences, and the leveling effect is necessarily influenced; the three buoys are far away from the tower, the buoys are connected with the tower through the platform, and consistency of the platform and the buoys in three directions in the processing and mounting process is difficult to ensure, namely, scale marks of the same value of the three buoys may not be completely on a plane, and although draft of the three buoys is consistent, the tower is not vertical.
2. The inclination sensor may have zero drift or error phenomenon with the lapse of time, and the accuracy gradually decreases, so that the accuracy is difficult to ensure if the inclination sensor is simply relied on to measure the inclination, and once the sensor fails, the true inclination cannot be rechecked.
3. When the inclination sensor fails and needs to be replaced, the water quantity in the buoy just changes, and the replaced inclination sensor lacks reference, because the floating wind turbine generator set in the sea is harder to level than the floating wind turbine generator set in the process of dock installation and debugging due to the mooring acting force below the buoy.
4. For a floating wind turbine with a yaw structure, the change of sine wave can be shown by yaw of the nacelle for one circle, and the average value of the sine wave can be used as the correction value of the inclination angle sensor.
5. The tool for installing the inclination sensor is directly welded to the inner wall of the tower, the inclination of the inner wall is measured by the sensor, and the inclination of the tower cannot be represented, because the tower is conical in shape, and the upper part is small, and the lower part is large, so that the inner wall of the tower is inclined and not vertical.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art and provides an accurate and reliable inclination angle measurement and rechecking method of a floating wind turbine generator without a yaw structure.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: the inclination angle measurement and rechecking method of the floating wind turbine without the yaw structure is based on the following characteristics:
the tower barrel of the wind turbine generator is formed by sequentially connecting a plurality of sections of tower barrel sections through flanges, the tower barrel and a foundation are connected through flanges, every two flanges are fastened through bolts, the flatness of the end faces of the flanges is high, and if all directions of the end faces of the flanges are in a horizontal state, the tower barrel is vertical; if the flange end face is in a non-horizontal state in any direction, the tower barrel is inclined; by utilizing the characteristics, when the foundation is manufactured, the foundation is erected, the front-back direction and the left-right direction of the flange end face of the foundation are measured by using a level ruler, and when the front-back direction and the left-right direction are measured to be zero, the foundation is vertical;
the method comprises the steps of keeping a foundation in a vertical state, manufacturing a U-shaped piece, wherein two angles of the U-shaped piece are right angles, laterally placing the U-shaped piece, namely, two vertical edges of the U-shaped piece are parallel up and down, an opening of the U-shaped piece faces the inside of the foundation, tightly attaching the top of the laterally placed U-shaped piece to the lower end face of a flange on the top of the foundation in the front-rear direction, keeping a tightly attached state, then welding the U-shaped piece to the inner wall of the foundation, at the moment, completely parallel to a mounting face of the U-shaped piece and the flange face, installing two identical double-shaft inclination angle sensors, wherein an X axis of each double-shaft inclination angle sensor is parallel to the front-rear direction of the foundation, a Y axis of each double-shaft inclination angle sensor is parallel to the left-right direction of the foundation, connecting the two double-shaft inclination angle sensors to an acquisition device, and correcting the inclination angles of the double-shaft inclination angle sensors to zero if the opening is not zero, at the moment, correcting the inclination angle to zero, at the moment, the inclination angle values of the double-shaft inclination angle sensors completely represent the inclination angles of the flange face, and then dismantling the two double-shaft inclination angle sensors and the acquisition device;
when the floating wind turbine generator is assembled at a wharf, selecting small wind and small wave weather, and after the assembly is completed, reinstalling the previous two double-shaft inclination angle sensors at the U-shaped part and accessing the collector; when the pontoon is filled with water and leveled, the inclination angle data at the moment is used as a reference for judging whether the tower barrel is vertical or not, if the inclination angles of the X axis and the Y axis are zero, the tower barrel is vertical, if any inclination angle of the X axis and the Y axis is not zero, the pontoon is not leveled, and the water quantity is required to be continuously regulated until the inclination angles of the X axis and the Y axis are zero;
then, installing a hanging bracket at the height of the flange surface of the foundation, wherein the center of the hanging bracket is the center of the basic section, hanging a steel wire at the center of the hanging bracket, connecting a pendant at the lower end of the steel wire, wherein the total length of the steel wire and the pendant is n, installing a reference bracket at the position m below the hanging bracket, wherein m is more than n, and the center of the reference bracket is the center of the basic section, and at the moment, the pendant is just aligned with the center of the reference bracket;
finally, towing the floating wind turbine to a designated sea area, lowering the anchor chain to the sea floor, wherein the bottom of only one pontoon of the floating wind turbine is connected by the anchor chain, the wind turbine normally operates under the action of wind power, and when the wind direction changes, the wind turbine rotates along with the wind direction by taking the pontoon connected by the anchor chain as the center;
when the floating wind turbine generator runs normally, the dip angles of the two double-shaft dip angle sensors are used as references;
when the inclination deviation of the two double-shaft inclination sensors is smaller than 0.1 degree, the two double-shaft inclination sensors are normal, when the X-axis inclination of the two double-shaft inclination sensors exceeds a set safety threshold, or when the Y-axis inclination of the two double-shaft inclination sensors exceeds the set safety threshold, an alarm signal is sent to prompt that the tower inclination is overlarge, the safety risk is caused, possibly caused by overlarge storms, or the anchor chain is abnormal;
when the deviation of the X-axis inclination angle or the Y-axis inclination angle of the two double-axis inclination angle sensors exceeds 0.1 degree, the method indicates that one of the double-axis inclination angle sensors is abnormal, an alarm signal is sent, the condition that one double-axis inclination angle sensor is abnormal is prompted, and rechecking is needed, and the rechecking method is as follows: under the condition of small wind and small wave, the distance L between the projection point of the pendant on the reference bracket and the center point is measured, the real inclination angle phi of the tower barrel can be calculated through the formula phi=arcsin (L/n), and if the numerical value of a certain double-shaft inclination angle sensor is far away from the real inclination angle phi, the abnormality of the double-shaft inclination angle sensor can be judged.
Further, a periodic automatic inspection program is set, and the method is as follows: under the condition of small wind and small waves, judging whether the numerical values of the two double-shaft inclination angle sensors are smaller than 0.1 degree, if so, not performing alarm processing, and if not, sending out an alarm signal to indicate that the tower barrel is inclined, and possibly that the water quantity in the pontoon is changed, and re-checking the water quantity and re-leveling are needed.
Further, the floating wind turbine generator system without the yaw structure comprises a three-fork star-shaped platform, three pontoons, an anchor chain, a foundation, a tower barrel and a main machine with blades; the main machine is fixedly connected with the tower barrel, and a yaw system is not arranged; the tower is characterized in that the tower barrel is arranged on the foundation through a flange, the foundation is arranged at the junction of three arms of the three-fork star-shaped platform, a pontoon is arranged at the tail end of each arm of the three-fork star-shaped platform, the bottom of one pontoon is connected with an anchor chain, and the lower end of the anchor chain is connected to the seabed.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the U-shaped piece of the double-shaft inclination angle sensor is completely parallel to the flange surface of the tower, and the numerical value of the double-shaft inclination angle sensor can embody the inclination state of the tower without other correction.
2. When the inclination angles of the two biaxial inclination sensors deviate, and it is impossible to determine which abnormality, a mechanically stable reference is used as a reference.
Drawings
Fig. 1 is a basic schematic.
FIG. 2 is a schematic diagram of a foundation and tower with a dual axis tilt sensor mounted.
Fig. 3 is a schematic view of a basic installation of a dual-axis tilt sensor and a pendant.
Fig. 4 is a second schematic view of the basic installation of the dual-axis tilt sensor and the pendant.
FIG. 5 is an oblique view of a floating wind turbine without yaw.
FIG. 6 is a side view of a floating wind turbine generator without yaw.
FIG. 7 is a top view of a floating wind turbine generator without yaw.
Fig. 8 is a schematic diagram of calculating an off-center angle of the pendant.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Referring to fig. 1 to 8, a floating wind turbine generator system without a yaw structure mainly comprises a three-fork star-shaped platform 1, three pontoons 2, an anchor chain 3, a flange 4, a foundation 5, a tower 6, blades 8, a main machine 9 and the like.
The main machine 9 is fixedly connected with the tower 6, and a yaw system is not arranged.
The foundation 5 is mounted to the junction of the three arms of the three-pronged star platform 1, one pontoon 2 is mounted at each arm end of the three-pronged star platform 1, the bottom of one pontoon 2 is connected by a chain 3, and the lower end of the chain 3 is connected to the sea bed.
Under the action of different wind directions, the wind turbine generator system rotates along with the wind direction by taking the buoy 2 connected with the anchor chain 3 as the center.
The inclination angle measurement and rechecking method of the floating wind turbine generator without the yaw structure provided by the embodiment is based on the following characteristics:
the tower cylinder 6 is formed by sequentially connecting a plurality of sections of tower cylinder sections through flanges 4, the tower cylinder 6 is connected with the foundation 5 through the flanges 4, every two flanges 4 are fastened through bolts, the flatness of the end faces of the flanges 4 is very high, and if the end faces of the flanges 4 are in horizontal states in all directions, the tower cylinder 6 is vertical; if the flange 4 is in a non-horizontal state in any direction, the inclination of the tower 6 is indicated. By utilizing this feature, when the foundation 5 is manufactured, the foundation 5 is erected, the front-rear direction and the left-right direction of the end face of the flange 4 of the foundation 5 are measured, and when the front-rear direction and the left-right direction inclination angles are both measured to be zero, it means that the foundation 5 is vertical.
The foundation 5 is kept in a vertical state, and a U-shaped piece 11 is manufactured, wherein two corners of the U-shaped piece 11 are right angles. The U-shaped piece 11 is placed laterally, namely, two vertical edges of the U-shaped piece 11 are parallel up and down, the opening of the U-shaped piece faces the inside of the foundation 5, the top of the laterally placed U-shaped piece 11 is clung to the lower end face of the flange 4 at the top of the foundation 5 in the front-back direction, the clung state is kept, then the U-shaped piece 11 is welded to the inner wall of the foundation 5, and at the moment, the installation face of the U-shaped piece 11 is completely parallel with the flange 4. On the mounting surface of the U-shaped member 11, two identical biaxial inclination angle sensors 12 are mounted, the X axis of the biaxial inclination angle sensors 12 is parallel to the front-rear direction of the foundation 5, the Y axis of the biaxial inclination angle sensors 12 is parallel to the left-right direction of the foundation 5, the biaxial inclination angle sensors 12 are connected to the collector 13, theoretically, the front-rear and left-right inclination angles at this time should be zero, if not zero, the biaxial inclination angle sensors 12 are subjected to zero correction, the inclination angle is corrected to zero, at this time, the inclination angle value of the biaxial inclination angle sensors 12 will completely represent the inclination angle of the flange 4, and then the biaxial inclination angle sensors 12 and the collector 13 are removed.
When the floating wind turbine generator is assembled at a wharf, a small wind and a small wave weather are selected, three pontoons 2 and a three-fork star-shaped platform 1 are firstly installed, then a foundation 5 is installed, then a tower 6 is installed, and finally a main machine 9 and blades 8 are installed. After assembly, the two previous dual axis tilt sensors 12 are reinstalled at the U-shaped piece 11 and access to the collector 13. When the pontoon 2 is filled with water 7 and leveled, the inclination data at the moment is used as a reference for judging whether the tower barrel 6 is vertical, if the inclination angles of the X axis and the Y axis are zero, the tower barrel 6 is vertical, if any inclination angle of the X axis and the Y axis is not zero, the pontoon 2 is not leveled, the tower barrel 6 is not vertical, and the water quantity needs to be continuously regulated until the inclination angles of the X axis and the Y axis are zero.
Then, a hanging bracket 15 is arranged at the flange height of the foundation 5, the center of the hanging bracket 15 is the center of the section of the foundation 5, a steel wire 16 is hung at the center of the hanging bracket 15, the lower end of the steel wire 16 is connected with a hanging weight 17, the steel wire 16 and the hanging weight 17 are 3000mm in length, a reference bracket 18 is arranged at the position 3100mm below the hanging bracket 15, the center of the reference bracket 18 is the center of the section of the foundation 5, and at the moment, the hanging weight 17 is just aligned with the center of the reference bracket 18.
And finally, towing the floating wind turbine to a designated sea area, lowering the anchor chain 3 to the sea floor, and normally operating the wind turbine under the action of wind force, wherein when the wind direction changes, the wind turbine rotates along with the wind direction by taking the buoy 2 connected with the anchor chain 3 as the center.
In normal operation of the floating wind turbine, the tilt angles of the two dual-axis tilt sensors 12 will be used as a reference.
When the inclination deviation of the two biaxial inclination sensors 12 is smaller than 0.1 degree, the two biaxial inclination sensors 12 are normal, when the X-axis inclination of the two biaxial inclination sensors 12 exceeds a set safety threshold, or when the Y-axis inclination of the two biaxial inclination sensors 12 exceeds the set safety threshold, an alarm signal is sent to prompt that the inclination of the tower 6 is overlarge, the safety risk is caused, possibly caused by overlarge wind waves, or the anchor chain 3 is abnormal.
When the deviation of the X-axis inclination angle or the Y-axis inclination angle of the two double-axis inclination angle sensors 12 exceeds 0.1 degree, an alarm signal is sent out to indicate that one double-axis inclination angle sensor 12 is abnormal, and the double-axis inclination angle sensor 12 needs to be rechecked. The maintenance personnel check the boarding, the checking method is as follows: in a small wind and small wave state, the distance L (unit is mm) between the projection point and the central point of the suspending drop 17 on the reference bracket 18 is measured, the true inclination angle phi of the tower 6 can be calculated through the formula phi=arcsin (L/3000), and if the numerical value of a certain double-shaft inclination angle sensor is far away from the true inclination angle phi, the abnormality of the double-shaft inclination angle sensor can be judged.
In addition, a periodic automatic inspection program should be set, and the method is as follows: in the low wind and low wave state, judging whether the values of the two biaxial inclination sensors 12 are smaller than 0.1 degree, if so, not performing alarm processing, and if not, sending out an alarm signal to indicate that the tower 6 has a certain inclination, and possibly that the water quantity 7 in the pontoon 2 has changed, and re-checking the water quantity 7 and re-leveling are needed.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so variations in shape and principles of the present invention should be covered.
Claims (3)
1. The inclination angle measurement and rechecking method of the floating wind turbine without the yaw structure is characterized by comprising the following steps of:
the tower barrel of the wind turbine generator is formed by sequentially connecting a plurality of sections of tower barrel sections through flanges, the tower barrel and a foundation are connected through flanges, every two flanges are fastened through bolts, the flatness of the end faces of the flanges is high, and if all directions of the end faces of the flanges are in a horizontal state, the tower barrel is vertical; if the flange end face is in a non-horizontal state in any direction, the tower barrel is inclined; by utilizing the characteristics, when the foundation is manufactured, the foundation is erected, the front-back direction and the left-right direction of the flange end face of the foundation are measured by using a level ruler, and when the front-back direction and the left-right direction are measured to be zero, the foundation is vertical;
the method comprises the steps of keeping a foundation in a vertical state, manufacturing a U-shaped piece, wherein two angles of the U-shaped piece are right angles, laterally placing the U-shaped piece, namely, two vertical edges of the U-shaped piece are parallel up and down, an opening of the U-shaped piece faces the inside of the foundation, tightly attaching the top of the laterally placed U-shaped piece to the lower end face of a flange on the top of the foundation in the front-rear direction, keeping a tightly attached state, then welding the U-shaped piece to the inner wall of the foundation, at the moment, completely parallel to a mounting face of the U-shaped piece and the flange face, installing two identical double-shaft inclination angle sensors, wherein an X axis of each double-shaft inclination angle sensor is parallel to the front-rear direction of the foundation, a Y axis of each double-shaft inclination angle sensor is parallel to the left-right direction of the foundation, connecting the two double-shaft inclination angle sensors to an acquisition device, and correcting the inclination angles of the double-shaft inclination angle sensors to zero if the opening is not zero, at the moment, correcting the inclination angle to zero, at the moment, the inclination angle values of the double-shaft inclination angle sensors completely represent the inclination angles of the flange face, and then dismantling the two double-shaft inclination angle sensors and the acquisition device;
when the floating wind turbine generator is assembled at a wharf, selecting small wind and small wave weather, and after the assembly is completed, reinstalling the previous two double-shaft inclination angle sensors at the U-shaped part and accessing the collector; when the pontoon is filled with water and leveled, the inclination angle data at the moment is used as a reference for judging whether the tower barrel is vertical or not, if the inclination angles of the X axis and the Y axis are zero, the tower barrel is vertical, if any inclination angle of the X axis and the Y axis is not zero, the pontoon is not leveled, and the water quantity is required to be continuously regulated until the inclination angles of the X axis and the Y axis are zero;
then, installing a hanging bracket at the height of the flange surface of the foundation, wherein the center of the hanging bracket is the center of the basic section, hanging a steel wire at the center of the hanging bracket, connecting a pendant at the lower end of the steel wire, wherein the total length of the steel wire and the pendant is n, installing a reference bracket at the position m below the hanging bracket, wherein m is more than n, and the center of the reference bracket is the center of the basic section, and at the moment, the pendant is just aligned with the center of the reference bracket;
finally, towing the floating wind turbine to a designated sea area, lowering the anchor chain to the sea floor, wherein the bottom of only one pontoon of the floating wind turbine is connected by the anchor chain, the wind turbine normally operates under the action of wind power, and when the wind direction changes, the wind turbine rotates along with the wind direction by taking the pontoon connected by the anchor chain as the center;
when the floating wind turbine generator runs normally, the dip angles of the two double-shaft dip angle sensors are used as references;
when the inclination deviation of the two double-shaft inclination sensors is smaller than 0.1 degree, the two double-shaft inclination sensors are normal, when the X-axis inclination of the two double-shaft inclination sensors exceeds a set safety threshold, or when the Y-axis inclination of the two double-shaft inclination sensors exceeds the set safety threshold, an alarm signal is sent to prompt that the tower inclination is overlarge, the safety risk is caused, possibly caused by overlarge storms, or the anchor chain is abnormal;
when the deviation of the X-axis inclination angle or the Y-axis inclination angle of the two double-axis inclination angle sensors exceeds 0.1 degree, the method indicates that one of the double-axis inclination angle sensors is abnormal, an alarm signal is sent, the condition that one double-axis inclination angle sensor is abnormal is prompted, and rechecking is needed, and the rechecking method is as follows: under the condition of small wind and small wave, the distance L between the projection point of the pendant on the reference bracket and the center point is measured, the real inclination angle phi of the tower barrel can be calculated through the formula phi=arcsin (L/n), and if the numerical value of a certain double-shaft inclination angle sensor is far away from the real inclination angle phi, the abnormality of the double-shaft inclination angle sensor can be judged.
2. The method for measuring and rechecking the dip angle of the floating wind turbine without the yaw structure according to claim 1, wherein a periodic automatic inspection program is set, and the method is as follows: under the condition of small wind and small waves, judging whether the numerical values of the two double-shaft inclination angle sensors are smaller than 0.1 degree, if so, not performing alarm processing, and if not, sending out an alarm signal to indicate that the tower barrel is inclined, and possibly that the water quantity in the pontoon is changed, and re-checking the water quantity and re-leveling are needed.
3. The method for measuring and rechecking the dip angle of the floating wind turbine without the yaw structure according to claim 1, wherein the floating wind turbine without the yaw structure comprises a three-pointed star-shaped platform, three buoys, an anchor chain, a foundation, a tower and a main machine with blades; the main machine is fixedly connected with the tower barrel, and a yaw system is not arranged; the tower is characterized in that the tower barrel is arranged on the foundation through a flange, the foundation is arranged at the junction of three arms of the three-fork star-shaped platform, a pontoon is arranged at the tail end of each arm of the three-fork star-shaped platform, the bottom of one pontoon is connected with an anchor chain, and the lower end of the anchor chain is connected to the seabed.
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| CN202310053600.3A CN116104713A (en) | 2023-02-03 | 2023-02-03 | Inclination angle measurement and rechecking method of floating wind turbine without yaw structure |
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| CN202310053600.3A CN116104713A (en) | 2023-02-03 | 2023-02-03 | Inclination angle measurement and rechecking method of floating wind turbine without yaw structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117128142A (en) * | 2023-10-09 | 2023-11-28 | 中国电力工程顾问集团有限公司 | Method and device for transporting mud floating type offshore wind turbine system |
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2023
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117128142A (en) * | 2023-10-09 | 2023-11-28 | 中国电力工程顾问集团有限公司 | Method and device for transporting mud floating type offshore wind turbine system |
| CN117128142B (en) * | 2023-10-09 | 2024-02-13 | 中国电力工程顾问集团有限公司 | Method and device for transporting mud floating type offshore wind turbine system |
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