CN116085211A - Wind turbine generator tower cylinder state monitoring method - Google Patents

Wind turbine generator tower cylinder state monitoring method Download PDF

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Publication number
CN116085211A
CN116085211A CN202211546690.1A CN202211546690A CN116085211A CN 116085211 A CN116085211 A CN 116085211A CN 202211546690 A CN202211546690 A CN 202211546690A CN 116085211 A CN116085211 A CN 116085211A
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CN
China
Prior art keywords
inertial measurement
data
tower
monitoring
impeller
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CN202211546690.1A
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Chinese (zh)
Inventor
蔡云龙
王昌景
范红招
项忱
闵忠顺
李滨
刘洁
王东利
敖瑞
李洪任
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Shaanxi Zhongke Qizhi Technology Co ltd
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Shaanxi Zhongke Qizhi Technology Co ltd
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Priority to CN202211546690.1A priority Critical patent/CN116085211A/en
Publication of CN116085211A publication Critical patent/CN116085211A/en
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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
    • 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
    • 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

Abstract

The invention provides a method for monitoring the state of a tower cylinder of a wind turbine, which comprises the steps of uniformly arranging 4 inertial measurement devices in the circumferential direction at the middle positions of each layer of tower cylinder flange and each section of tower cylinder of the tower cylinder, arranging 2 acceleration sensors in a blade root hub, and realizing real-time monitoring of the state of the tower cylinder according to monitoring data when the wind turbine runs. The method for monitoring the state of the tower cylinder of the wind turbine can rapidly and effectively analyze and judge the abnormal deformation and abnormal angle change of the lower flange, the middle part of the tower cylinder and the upper flange of any tower cylinder at four azimuth positions which are respectively and sequentially separated by 90 degrees by taking the main wind direction as a starting point, and send out safety early warning information.

Description

Wind turbine generator tower cylinder state monitoring method
Technical Field
The invention relates to the technical field of wind turbine generator monitoring, in particular to a wind turbine generator tower state monitoring method.
Background
The wind turbine generator is a device which drives a wind driven generator to rotate by the windward rotation of an impeller, converts wind energy into mechanical energy and then converts the mechanical energy into electric energy. The tower is one of key stress components of the wind turbine, and the normal maintenance of the wind turbine in a normal and safe state is the basic guarantee of the normal operation of the wind turbine. The problems of inclination, deformation, vibration and the like of the wind power tower can possibly cause serious accidents of collapse and breakage of the tower to endanger personnel safety and cause great economic loss if the problems reach a certain degree.
In recent years, wind turbines are continuously developed towards large-scale and intelligent directions, and online fault monitoring systems are increasingly applied to wind turbines, but are quite simple and rough, a detailed monitoring mode and a computing mode cannot be provided, and a detailed processing mode of measured data cannot be described in detail.
Therefore, a novel method for monitoring the state of the tower cylinder of the wind turbine is needed, the state of the tower cylinder is monitored in real time, and the occurrence of safety accidents of the wind turbine is reduced.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a wind turbine tower cylinder state monitoring method which can rapidly and effectively analyze and judge the abnormal deformation and angle change of a lower flange, a middle part of a tower cylinder and an upper flange of any tower cylinder at four azimuth positions which are respectively started from a main wind direction and are separated by 90 degrees in sequence, and send out safety early warning information.
The invention adopts the technical proposal for solving the technical problems that: the method for monitoring the state of the tower cylinder of the wind turbine generator comprises the following steps:
s1, uniformly arranging 4 inertial measurement devices in the circumferential direction at the middle positions of each layer of tower flange and each section of tower, and arranging 2 acceleration sensors in a blade root hub;
s2, when the wind turbine runs, the impeller rotates along with the wind turbine, the acceleration sensor monitors acceleration data in real time and transmits the acceleration data to the central processing unit, and the central processing unit acquires the real-time rotating speed of the impeller and the real-time position of each blade according to the acceleration data; the inertial measurement device monitors inertial measurement data of each monitoring position in real time, the inertial measurement data are transmitted to the central processing unit by the data acquisition instrument, and the central processing unit acquires the speed and displacement of each monitoring position along the x direction, the y direction and the z direction and the angular speed and angle of rotation around the x direction, the y direction and the z direction according to the inertial measurement data; for each inertial measurement device, the x direction refers to the main wind direction, the z direction is the vertical upward direction, and the y direction is the direction perpendicular to the x direction and the z direction;
s3, realizing real-time monitoring of the state of the tower barrel according to each monitoring data, and comprising the following steps:
s3.1, setting a jth inertial measurement device in the middle of an ith section tower as an ith-tj inertial measurement device, taking time T=1 second as a data statistical analysis period, and recording displacement in the x direction, the y direction and the z direction, which is obtained by analyzing and calculating inertial measurement data of the ith-tj inertial measurement device, as D _i_tjx 、D _i_tjy And D _i_tjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_tjx 、A _i_tjy And A _i_tjz The method comprises the steps of carrying out a first treatment on the surface of the The jth inertial measurement device of the ith tower flange is marked as an ith-fj inertial measurement device, and displacement in the x direction, the y direction and the z direction, which is obtained by analyzing and calculating inertial measurement data of the ith-fj inertial measurement device, is marked as D _i_fjx 、D _i_fjy And D _i_fjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_fjx 、A _i_fjy And A _i_fjz The method comprises the steps of carrying out a first treatment on the surface of the When the time isImmediately starting the next t=1 second data statistical analysis period after the t=1 second data statistical analysis period is finished, so that the statistical analysis is uninterrupted; repeating the steps S3.2 to S3.4, and circularly monitoring the cylindrical state of each section tower;
s3.2, for the inertial measurement device of the current ith tower barrel and the upper and lower flanges, if any one of the following three conditions is satisfied:
||(D _i+1_fjx -D _i_tjx )/(D _i_tjx -D _i_fjx )|-1|≥0.3；
||(D _i+1_fjy -D _i_tjy )/(D _i_tjy -D _i_fjy )|-1|≥0.3；
||(D _i+1_fjz -D _i_tjz )/(D _i_tjz -D _i_fjz )|-1|≥0.3；
the tower deformation abnormality of the i-th section tower is indicated by the i-fj-th inertial measurement device, the i-tj-th inertial measurement device and the i+1-fj-th inertial measurement device, and a safety early warning of the i-th section tower deformation abnormality is sent;
s3.3, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||D _i_t1x /D _i_t3x |-1|≥0.3；
||D _i_t2x /D _i_t4x |-1|≥0.3；
the deformation of the middle part of the ith section tower barrel is obviously abnormal, and a safety early warning of the deformation of the middle part of the ith section tower barrel is sent out;
s3.4, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||A _i_t1x /A _i_t3x |-1|≥0.3；
||A _i_t2x /A _i_t4x |-1|≥0.3；
the method shows that the angle change of the middle part of the ith section tower barrel is obviously abnormal, and the safety early warning of the abnormal angle change of the middle part of the ith section tower barrel is sent out.
The mutual positions of the 2 acceleration sensors in the step S1 simultaneously satisfy the following conditions:
a1, the first acceleration sensor and the second acceleration sensor are positioned on a circumference taking the rotation center of the impeller as the center of a circle, and the arc between the first acceleration sensor and the second acceleration sensor is 90 degrees;
a2, the planes of the monitoring direction axes of the 2 acceleration sensors are perpendicular to the rotation central axis of the impeller;
the intersection point of the monitoring direction axes of the a3 and 2 acceleration sensors is on the rotation central axis of the impeller, namely the rotation central axis of the 2 acceleration sensors coincides with the rotation central axis of the impeller;
a4, the monitoring direction axis of the first acceleration sensor is arranged in the plane where the blade root flange axis of the first blade and the rotation central axis of the impeller are located.
Step S3 includes monitoring the impeller rotation imbalance, including the following: and setting a data comparison point at intervals of 30 degrees in the rotation angle range of the impeller at 360 degrees, namely setting 12 data comparison points in total, for any jth data comparison point, when 3 blades sequentially rotate through the data comparison point, recording and comparing displacement data in the x direction, the y direction and the z direction and angle data rotating around the x direction, the y direction and the z direction, which are obtained through 4 inertia measurement devices on the flange at the highest layer, when each blade rotates through the data comparison point, and when the displacement data in the x direction, the y direction and the z direction, which are obtained through the 4 inertia measurement devices on the flange at the highest layer, and the data difference value when the other two blades rotate through the data comparison point reach a design threshold value, indicating that the rotation of the impeller is unbalanced, and giving out early warning.
The invention has the beneficial effects based on the technical scheme that:
(1) According to the method for monitoring the tower barrel state of the wind turbine, 4 inertia measuring devices are respectively arranged on each layer of tower barrel flange and in the middle of each section of tower barrel, so that the displacement and angle change conditions of the middle parts of each layer of tower barrel flange and each section of tower barrel in four directions which are separated by 90 degrees in sequence by taking the main wind direction as a starting point can be monitored in detail.
(2) The method for monitoring the tower barrel state of the wind turbine generator provided by the invention is based on displacement data and angle data obtained by the inertial measurement devices of the lower flange, the middle part and the upper flange of any tower barrel in the same direction, can rapidly and effectively analyze and judge the abnormal deformation and abnormal angle change of the lower flange, the middle part and the upper flange of any tower barrel in four azimuth positions which are respectively separated by 90 degrees from each other by taking the main wind direction as a starting point, and can send out safety early warning information.
(3) According to the wind turbine generator tower state monitoring method, displacement data and angle change data obtained by four inertia measuring devices at the middle part of any tower can be effectively analyzed and judged, deformation quantity abnormality and angle change abnormality conditions of the middle part of any tower can be effectively analyzed and judged, and safety early warning information is sent out. The advantages are mutually complemented with the advantages, the sensitivity is high, and the technology is reliable.
(4) The method for monitoring the state of the tower cylinder of the wind turbine can quickly and accurately find out the problem of unbalanced rotation of the impeller.
Drawings
FIG. 1 is a schematic diagram of an inertial measurement unit mounted on a flange of a tower and in the middle of the tower;
FIG. 2 is a top plan view of the mounting arrangement of the inertial measurement unit on the tower flange;
FIG. 3 is a top view of an inertial measurement unit condition monitoring unit mounted on a tower flange;
FIG. 4 is a bottom view of the inertial measurement unit condition monitoring unit mounted on the tower flange;
FIG. 5 is a front view of an inertial measurement unit condition monitoring unit mounted on a tower flange;
FIG. 6 is a block diagram of a mounting bracket;
FIG. 7 is a diagram of the connection structure of the base plate and the connection post;
FIG. 8 is a schematic view of the structure of the upper surface of the top plate;
FIG. 9 is a schematic view of the structure of the lower surface of the top plate;
FIG. 10 is a schematic view of the structure of the lower surface of the middle sole plate;
FIG. 11 is a schematic view of an inertial measurement unit mounted on a mounting bracket;
fig. 12 is a front view of the installation position of the acceleration sensor.
Fig. 13 is a side view of the installation position of the acceleration sensor.
Fig. 14 is a view showing the rotational angle position of the impeller.
In the figure: the device comprises a 1-tower flange, 2-flange bolts, 3-inclination sensors, 31-signal wire interfaces, 4-mounting supports, 41-top plates, 411-round bosses, 412-bolt mounting holes, 413-acceleration sensor mounting holes, 42-bottom plates, 43-connecting columns, 431-threaded holes, 5-bolts A, 6-reinforcing ribs, 7-U-shaped openings, 8-bolts B, 9-blades, 10-acceleration sensors, planes of monitoring direction axes of 11-2 acceleration sensors, 12-impeller rotation central axes and 13-horizontal planes.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The invention provides a wind turbine tower state monitoring method, which comprises the following steps:
s1, uniformly arranging 4 inertial measurement devices in the circumferential direction at the middle positions of each layer of tower flange and each section of tower, wherein the 4 inertial measurement devices are sequentially separated by 90 degrees. In this embodiment, the installation schematic diagram of the inertial measurement device on the tower flange 1 is shown in fig. 1 to 11, and the monitoring device includes an inclination sensor 3, a data acquisition device and a central processing unit (the data acquisition device and the central processing unit are not shown in the drawings). The inclination sensor is fixed on the tower cylinder flange through the mounting support 4, and in the embodiment, the inclination sensor is mounted on the mounting support, and the fixing support is fixed on the Yu Datong flange in a wrapping and clamping connection mode, so that the monitoring of the inclination sensor on the tower cylinder flange is realized. Specifically, the mounting support comprises a top plate 41, a bottom plate 42 and connecting columns 43, wherein the connecting columns are connected between the top plate and the bottom plate in a distributed manner, and the connecting columns are positioned at one ends of the bottom plate and the top plate, so that the top plate, the bottom plate and the connecting columns are connected into a whole in a C-shaped structure, and the top plate, the bottom plate and the connecting columns are connected between the upper surface and the lower surface of the tower cylinder flange in a wrapping manner. Specifically, the spliced pole respectively is provided with one in the four corners department of roof and bottom plate link, and the spliced pole is provided with four promptly to stable roof and the bottom plate of connecting, make things convenient for later stage to support inclination sensor, can avoid the too big weight of roof and bottom plate junction again, influence the clamping force of installing support.
When the mounting support is processed, if the size has small deviation, the mounting support is easy to be clamped on the tower flange, or the mounting support cannot be mounted on the tower flange. For the installation of convenient erection support, the bottom of spliced pole and the last fixed surface of bottom plate are connected, the top of spliced pole is provided with screw hole 431 in this embodiment, the lower surface of roof corresponds to be connected with round boss 411, the center of round boss is provided with the bolt mounting hole, be provided with bolt mounting hole 412 on the roof of round boss top corresponds, connect roof and spliced pole through bolt A5, and bolt A is located the bolt mounting hole, the height of bolt A upper surface is less than or equal to the height of roof upper surface, through bolt A's subsidence installation, avoid bolt A to influence the installation of later stage inclination sensor. Meanwhile, through a bolt connection mode, even if the size of the mounting support has small deviation, the mounting support can be clamped on the tower flange. In order to further strengthen the clamping strength, the upper surface of the top plate and the lower surface of the bottom plate are connected and fixed with reinforcing ribs 6 in the embodiment.
Because the installation position on the tower flange is smaller, if the surface distance of the wrapping clip is smaller, the installation support is very easy to fall off, so the installation support passes through the flange bolts 2 when the wrapping clip is wrapped, therefore, in the embodiment, the exposed spaces of the flange bolts are reserved on the top plate and the bottom plate, specifically, through holes are formed in one ends of the top plate and the bottom plate, which are far away from the connecting column, the size of the through holes is larger than that of the flange bolts, the wrapping clip of the installation support is connected between the upper surface and the lower surface of the tower flange, and the upper flange bolts and the lower flange bolts at the installation position are respectively exposed from the through holes on the top plate and the bottom plate; in this embodiment, the through holes on the top plate and the bottom plate are both U-shaped openings 7, and the U-shaped openings face to the positions far away from the connecting posts.
After the installation of the installation support is completed, the inclination sensor is installed on the upper surface of the top plate above the connecting column, specifically, an inclination sensor installation hole 413 is formed in the top plate, the inclination sensor is fixedly connected to the upper surface of the top plate through a bolt B8, and the reinforcing ribs are fixed on the top plate, so that the inclination sensor is located on the reinforcing ribs. In this embodiment, gaskets (not shown in the figure) with a certain thickness and an inclination angle are arranged between the top plate, the bottom plate and the upper and lower surfaces of the tower flange, and the thickness and the inclination angle of the gaskets are selected according to the installation angle of the inclination sensor, so that the installation angle of the inclination sensor is adjusted.
The inclination angle sensor monitors the inclination angle and inclination direction change of the installation position, a signal line interface 31 is arranged on the inclination angle sensor, the inclination angle sensor is connected with the data acquisition instrument through a signal line and transmits the monitored signal, the data acquisition instrument acquires the inclination angle change data of the tower barrel flange monitored by the inclination angle sensor, the data acquisition instrument is connected with the central processing unit through a wired or wireless mode and transmits the data, the central processing unit stores and analyzes the data, and if the inclination angle of the tower barrel flange is found to reach a design threshold value, a safety early warning is sent.
The installation steps of the wind turbine generator tower flange state monitoring device provided by the embodiment are as follows: (1) Respectively penetrating the bottom plate and the top plate through the flange bolts, respectively attaching the bottom plate and the top plate to the upper surface and the lower surface of the tower barrel flange, and according to the installation angle requirement, padding gaskets on the bottom plate and the top plate;
(2) Connecting and fixing the connecting columns on the top plate and the bottom plate through bolts A, and tightening the bolts A to enable the whole mounting support to be clamped and fixed on the tower flange;
(3) The inclination sensor is arranged on the top plate through a bolt B;
(4) The inclination angle sensor, the data acquisition instrument and the central processing unit are sequentially connected.
Referring to fig. 12, 2 acceleration sensors 10 are deployed within the blade root hub. Referring to fig. 13, the mutual positions of 2 acceleration sensors simultaneously satisfy the following conditions:
a1, the first acceleration sensor and the second acceleration sensor are positioned on a circumference taking the rotation center of the impeller as the center of a circle, and the arc between the first acceleration sensor and the second acceleration sensor is 90 degrees;
a2, the plane 11 where the monitoring direction axes of the 2 acceleration sensors are positioned is perpendicular to the rotation central axis of the impeller;
the intersection point of the monitoring direction axes of the a3 and 2 acceleration sensors is on the impeller rotation central axis 12, namely the rotation central axis of the 2 acceleration sensors coincides with the impeller rotation central axis, and the angle between the axis and the horizontal plane 13 is beta;
a4, the monitoring direction axis of the first acceleration sensor is arranged in the plane where the blade root flange axis of the first blade and the rotation central axis of the impeller are located.
S2, referring to FIG. 14, when the wind turbine runs, the impeller rotates along with the wind turbine, the acceleration sensor monitors acceleration data in real time and transmits the acceleration data to the central processing unit, and the central processing unit acquires the real-time rotating speed of the impeller and the real-time position of each blade 9 according to the acceleration data; the inertial measurement device monitors inertial measurement data of each monitoring position in real time, the inertial measurement data are transmitted to the central processing unit by the data acquisition instrument, and the central processing unit acquires the speed and displacement of each monitoring position along the x direction, the y direction and the z direction and the angular speed and angle of rotation around the x direction, the y direction and the z direction according to the inertial measurement data; for each inertial measurement unit, the x-direction refers to the dominant wind direction, the z-direction is the vertically upward direction, and the y-direction is the direction perpendicular to the x-direction and the z-direction.
S3, realizing real-time monitoring of the state of the tower barrel according to each monitoring data, and comprising the following steps:
s3.1, setting a jth inertial measurement device in the middle of an ith section tower as an ith-tj inertial measurement device, taking time T=1 second as a data statistical analysis period, and recording displacement in the x direction, the y direction and the z direction, which is obtained by analyzing and calculating inertial measurement data of the ith-tj inertial measurement device, as D _i_tjx 、D _i_tjy And D _i_tjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_tjx 、A _i_tjy And A _i_tjz The method comprises the steps of carrying out a first treatment on the surface of the The jth inertial measurement unit of the ith tower flange is marked as an ith-fj inertial measurement unit and passes through the ith tower flangeThe displacement in the x direction, the y direction and the z direction, which are obtained by analyzing and calculating the inertial measurement data of the i_fj inertial measurement device, is recorded as D _i_fjx 、D _i_fjy And D _i_fjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_fjx 、A _i_fjy And A _i_fjz The method comprises the steps of carrying out a first treatment on the surface of the Immediately starting the next data statistical analysis period of t=1 seconds after the data statistical analysis period of t=1 seconds is ended, so that the statistical analysis is uninterrupted; and repeating the steps S3.2 to S3.4, and circularly monitoring the cylindrical states of all the towers.
S3.2, for the inertial measurement device of the current ith tower barrel and the upper and lower flanges, if any one of the following three conditions is satisfied:
||(D _i+1_fjx -D _i_tjx )/(D _i_tjx -D _i_fjx )|-1|≥0.3；
||(D _i+1_fjy -D _i_tjy )/(D _i_tjy -D _i_fjy )|-1|≥0.3；
||(D _i+1_fjz -D _i_tjz )/(D _i_tjz -D _i_fjz )|-1|≥0.3；
and the tower deformation abnormality of the i-th section tower is indicated by the i-fj-th inertial measurement device, the i-tj-th inertial measurement device and the i+1-fj-th inertial measurement device, and a safety early warning of the i-th section tower deformation abnormality is sent.
Taking j=1, namely that the i_t1 inertia measuring device on each tower section and the i_f1 inertia measuring device on each flange are positioned at the main wind direction position, substituting any of the three formulas (D) _i+1_f1x -D _i_t1x )/(D _i_t1x -D _i_f1x )|-1|≥0.3、||(D _i+1_f1y -D _i_t1y )/(D _i_t1y -D _i_f1y )|-1|≥0.3、||(D _i+1_f1z -D _i_t1z )/(D _i_t1z -D _i_f1z ) And if the I-1I is not less than 0.3, the tower deformation at the positions of the three inertial measurement devices with the numbers of i_f1, i_t1 and i+1_f1 is obviously abnormal, and a safety early warning of the abnormality of the tower deformation of the main wind direction azimuth tower of the ith section of tower is sent. Similarly, when j=2, j=3, j=4, the following three formulas are usedIf any one of the formulas is established, the condition that the tower deformation of the ith tower barrel at 90 degrees, 180 degrees and 270 degrees from the main wind direction is abnormal is respectively indicated, and a safety early warning is sent.
S3.3, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||D _i_t1x /D _i_t3x |-1|≥0.3；
||D _i_t2x /D _i_t4x |-1|≥0.3；
the deformation of the middle part of the ith section tower barrel is obviously abnormal, and the safety early warning of the deformation of the middle part of the ith section tower barrel is sent out.
S3.4, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||A _i_t1x /A _i_t3x |-1|≥0.3；
||A _i_t2x /A _i_t4x |-1|≥0.3；
the method shows that the angle change of the middle part of the ith section tower barrel is obviously abnormal, and the safety early warning of the abnormal angle change of the middle part of the ith section tower barrel is sent out.
Step S3 includes monitoring the impeller rotation imbalance, including the following: and setting a data comparison point at intervals of 30 degrees in the rotation angle range of the impeller at 360 degrees, namely setting 12 data comparison points in total, for any jth data comparison point, when 3 blades sequentially rotate through the data comparison point, recording and comparing displacement data in the x direction, the y direction and the z direction and angle data rotating around the x direction, the y direction and the z direction, which are obtained through 4 inertia measurement devices on the flange at the highest layer, when each blade rotates through the data comparison point, and when the displacement data in the x direction, the y direction and the z direction, which are obtained through the 4 inertia measurement devices on the flange at the highest layer, and the data difference value when the other two blades rotate through the data comparison point reach a design threshold value, indicating that the rotation of the impeller is unbalanced, and giving out early warning.
The method for monitoring the state of the tower cylinder of the wind turbine can rapidly and effectively analyze and judge the abnormal deformation and abnormal angle change of the lower flange, the middle part of the tower cylinder and the upper flange of any tower cylinder at four azimuth positions which are respectively and sequentially separated by 90 degrees by taking the main wind direction as a starting point, and send out safety early warning information.

Claims (3)

1. The method for monitoring the state of the tower cylinder of the wind turbine generator is characterized by comprising the following steps of:
s1, uniformly arranging 4 inertial measurement devices in the circumferential direction at the middle positions of each layer of tower flange and each section of tower, and arranging 2 acceleration sensors in a blade root hub;
s2, when the wind turbine runs, the impeller rotates along with the wind turbine, the acceleration sensor monitors acceleration data in real time and transmits the acceleration data to the central processing unit, and the central processing unit acquires the real-time rotating speed of the impeller and the real-time position of each blade according to the acceleration data; the inertial measurement device monitors inertial measurement data of each monitoring position in real time, the inertial measurement data are transmitted to the central processing unit by the data acquisition instrument, and the central processing unit acquires the speed and displacement of each monitoring position along the x direction, the y direction and the z direction and the angular speed and angle of rotation around the x direction, the y direction and the z direction according to the inertial measurement data; for each inertial measurement device, the x direction refers to the main wind direction, the z direction is the vertical upward direction, and the y direction is the direction perpendicular to the x direction and the z direction;
s3, realizing real-time monitoring of the state of the tower barrel according to each monitoring data, and comprising the following steps:
s3.1, setting a jth inertial measurement device in the middle of an ith section tower as an ith-tj inertial measurement device, taking time T=1 second as a data statistical analysis period, and recording displacement in the x direction, the y direction and the z direction, which is obtained by analyzing and calculating inertial measurement data of the ith-tj inertial measurement device, as D _i_tjx 、D _i_tjy And D _i_tjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_tjx 、A _i_tjy And A _i_tjz The method comprises the steps of carrying out a first treatment on the surface of the Column method of ith layerThe jth inertial measurement unit of the blue is marked as an ith-fj inertial measurement unit, and displacement in three directions of x direction, y direction and z direction, which is obtained by analyzing and calculating inertial measurement data of the ith-fj inertial measurement unit, is marked as D _i_fjx 、D _i_fjy And D _i_fjz The angular changes around the x-direction, y-direction and z-direction are denoted as A _i_fjx 、A _i_fjy And A _i_fjz The method comprises the steps of carrying out a first treatment on the surface of the Immediately starting the next data statistical analysis period of t=1 seconds after the data statistical analysis period of t=1 seconds is ended, so that the statistical analysis is uninterrupted; repeating the steps S3.2 to S3.4, and circularly monitoring the cylindrical state of each section tower;
s3.2, for the inertial measurement device of the current ith tower barrel and the upper and lower flanges, if any one of the following three conditions is satisfied:
||(D _i+1_fjx -D _i_tjx )/(D _i_tjx -D _i_fjx )|-1|≥0.3；
||(D _i+1_fjy -D _i_tjy )/(D _i_tjy -D _i_fjy )|-1|≥0.3；
||(D _i+1_fjz -D _i_tjz )/(D _i_tjz -D _i_fjz )|-1|≥0.3；
the tower deformation abnormality of the i-th section tower is indicated by the i-fj-th inertial measurement device, the i-tj-th inertial measurement device and the i+1-fj-th inertial measurement device, and a safety early warning of the i-th section tower deformation abnormality is sent;
s3.3, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||D _i_t1x /D _i_t3x |-1|≥0.3；
||D _i_t2x /D _i_t4x |-1|≥0.3；
the deformation of the middle part of the ith section tower barrel is obviously abnormal, and a safety early warning of the deformation of the middle part of the ith section tower barrel is sent out;
s3.4, for the inertial measurement unit of the current ith section tower, if any one of the following two conditions holds:
||A _i_t1x /A _i_t3x |-1|≥0.3；
||A _i_t2x /A _i_t4x |-1|≥0.3；
the method shows that the angle change of the middle part of the ith section tower barrel is obviously abnormal, and the safety early warning of the abnormal angle change of the middle part of the ith section tower barrel is sent out.
2. The wind turbine tower state monitoring method according to claim 1, wherein: the mutual positions of the 2 acceleration sensors in the step S1 simultaneously satisfy the following conditions:
of the a1 and 2 acceleration sensors, the first acceleration sensor and the second acceleration sensor are positioned on a circumference taking the rotation center of the impeller as the center of a circle, and the arc between the first acceleration sensor and the second acceleration sensor is 90 degrees;
a2, the planes of the monitoring direction axes of the 2 acceleration sensors are perpendicular to the rotation central axis of the impeller;
the intersection point of the monitoring direction axes of the a3 and 2 acceleration sensors is on the rotation central axis of the impeller, namely the rotation central axis of the 2 acceleration sensors coincides with the rotation central axis of the impeller;
a4, the monitoring direction axis of the first acceleration sensor is arranged in the plane where the blade root flange axis of the first blade and the rotation central axis of the impeller are located.
3. The wind turbine tower state monitoring method according to claim 1, wherein: step S3 includes monitoring the impeller rotation imbalance, including the following: and setting a data comparison point at intervals of 30 degrees in the rotation angle range of the impeller at 360 degrees, namely setting 12 data comparison points in total, for any jth data comparison point, when 3 blades sequentially rotate through the data comparison point, recording and comparing displacement data in the x direction, the y direction and the z direction and angle data rotating around the x direction, the y direction and the z direction, which are obtained through 4 inertia measurement devices on the flange at the highest layer, when each blade rotates through the data comparison point, and when the displacement data in the x direction, the y direction and the z direction, which are obtained through the 4 inertia measurement devices on the flange at the highest layer, and the data difference value when the other two blades rotate through the data comparison point reach a design threshold value, indicating that the rotation of the impeller is unbalanced, and giving out early warning.
CN202211546690.1A 2022-12-05 2022-12-05 Wind turbine generator tower cylinder state monitoring method Pending CN116085211A (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117404260A (en) * 2023-12-14 2024-01-16 吉睿智控科技（天津）有限公司 Bolt loosening monitoring method and device, electronic equipment and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117404260A (en) * 2023-12-14 2024-01-16 吉睿智控科技（天津）有限公司 Bolt loosening monitoring method and device, electronic equipment and storage medium
CN117404260B (en) * 2023-12-14 2024-02-13 吉睿智控科技（天津）有限公司 Bolt loosening monitoring method and device, electronic equipment and storage medium

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