CN109026554B - Wind generating set pylon load measurement system - Google Patents
Wind generating set pylon load measurement system Download PDFInfo
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- CN109026554B CN109026554B CN201810882501.5A CN201810882501A CN109026554B CN 109026554 B CN109026554 B CN 109026554B CN 201810882501 A CN201810882501 A CN 201810882501A CN 109026554 B CN109026554 B CN 109026554B
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/331—Mechanical loads
Abstract
The invention discloses a tower load measuring system of a wind generating set, which comprises a tower load measuring module, wherein the tower load measuring module comprises a tower top load measuring module, a tower middle load measuring module, a tower bottom load measuring module and a measuring signal receiving module, the output end of the tower top load measuring module is connected with the input end of the measuring signal receiving module, the output end of the tower middle load measuring module is connected with the input end of the measuring signal receiving module, and the output end of the tower bottom load measuring module is connected with the input end of the measuring signal receiving module. The tower load measuring system of the wind generating set achieves the purposes that the real-time monitoring of the tower load can be met, and meanwhile, the statistical data can be used for providing reliable test basis for the further optimization of the wind generating set, so that the defects of theoretical calculation and simulation of the existing tower load are overcome, and the reliability of the data is greatly improved.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind generating set tower load measuring system.
Background
With the continuous development of society and the increasing demand for energy, wind energy has been greatly developed around the world as an important clean and renewable energy source, and the proportion of wind power generation is also increasing, becoming a conventional energy source. With the increasing capacity of a single machine and the increasing height of the tower, the trend of the wind power industry is recently realized. Under the trend that wind power is increased and is more and more developed towards refinement, increasing the height of a tower of a fan is a direct and effective means for increasing the generated energy in a low wind speed area, so that the design of the tower is an extremely important part in the whole machine design of a unit, the tower is a structure for supporting parts of an engine room and a wind driven generator and bears all loads from all parts of a wind turbine, and the tower not only needs to have a certain height to enable the wind turbine to operate at an ideal position, but also needs to have enough strength and rigidity to ensure that the wind turbine cannot topple under the extreme wind condition.
In the existing tower design, ANSYS software is adopted to model the tower, and Blade software is used for load calculation, however, because the field application environment is complex, a certain difference exists between a theoretical calculation value and an actual load, various real objective factors can influence the authenticity of theoretical calculation, the structure is optimized as much as possible on the premise of meeting the safety, the material cost is saved, and the method is a key for tower design, so that the method is particularly important for judging the actual load of the tower through field test.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a wind generating set tower load measuring system, which solves the problems that due to the fact that the field application environment is complex, a certain difference exists between a theoretical calculation value and an actual load, and various real objective factors can influence the authenticity of theoretical calculation.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the tower load measuring module comprises a tower top load measuring module, a tower middle load measuring module, a tower bottom load measuring module and a measuring signal receiving module, wherein the output end of the tower top load measuring module is connected with the input end of the measuring signal receiving module, the output end of the tower middle load measuring module is connected with the input end of the measuring signal receiving module, and the output end of the tower bottom load measuring module is connected with the input end of the measuring signal receiving module.
Further, the tower top load measuring module comprises a tower top grating optical fiber stress signal, a first signal demodulator, a first signal filter, a first data acquisition and processing module, a first signal amplifier and a first wireless sending module, wherein the output end of the tower top grating optical fiber stress signal is connected with the input end of the first signal demodulator, the output end of the first signal demodulator is connected with the input end of the first signal filter, the output end of the first signal filter is connected with the input end of the first data acquisition and processing module, the output end of the first data acquisition and processing module is connected with the input end of the first signal amplifier, and the output end of the first signal amplifier is connected with the input end of the first wireless sending module.
Furthermore, the tower load measurement module comprises a tower grating optical fiber stress signal, a second signal demodulator, a second signal filter, a second data acquisition and processing module, a second signal amplifier and a second wireless transmission module, wherein the output end of the tower grating optical fiber stress signal is connected with the input end of the second signal demodulator, the output end of the second signal demodulator is connected with the input end of the second signal filter, the output end of the second signal filter is connected with the input end of the second data acquisition and processing module, the output end of the second data acquisition and processing module is connected with the input end of the second signal amplifier, and the output end of the second signal amplifier is connected with the input end of the second wireless transmission module.
Furthermore, the tower bottom load measurement module comprises a tower bottom grating optical fiber stress signal, a third signal demodulator, a third signal filter, a third data acquisition and processing module, a third signal amplifier and a third wireless transmission module, wherein the output end of the tower bottom grating optical fiber stress signal is connected with the input end of the third signal demodulator, the output end of the third signal demodulator is connected with the input end of the third signal filter, the output end of the third signal filter is connected with the input end of the third data acquisition and processing module, the output end of the third data acquisition and processing module is connected with the input end of the third signal amplifier, and the output end of the third signal amplifier is connected with the input end of the third wireless transmission module.
Further, the measuring signal receiving module comprises a wireless receiving module, a fourth signal amplifier, a collector, a PC, a remote checking module and a monitoring system, the output end of the wireless receiving module is connected with the input end of the fourth signal amplifier, the output end of the fourth signal amplifier is connected with the input end of the collector, the output end of the collector is connected with the input end of the PC, the output end of the monitoring system is connected with the input end of the PC, the output end of the PC is connected with the input end of the monitoring system, and the output end of the monitoring system is connected with the input end of the collector.
Furthermore, the wireless receiving module, the fourth signal amplifier and the collector are all connected by RS232 interfaces.
Furthermore, the PC is connected with the remote checking module through a wind field ring network switch.
Furthermore, the collector and the monitoring system are connected by adopting a PCB (printed Circuit Board).
(III) advantageous effects
The invention has the following beneficial effects: the tower load measuring system of the wind generating set is characterized in that the output end of the tower top load measuring module is connected with the input end of the measuring signal receiving module, the output end of the tower middle load measuring module is connected with the input end of the measuring signal receiving module, and the output end of the tower bottom load measuring module is connected with the input end of the measuring signal receiving module, so that the real-time monitoring of the tower load can be met, meanwhile, the statistical data can be used for providing reliable test basis for the further optimization of the wind generating set, the defects of theoretical calculation and simulation of the existing tower load are overcome, as the traditional load test is generally carried out by a method of sticking a strain gauge, the traditional load test is often influenced by signal interference in the test process, the test precision is reduced, and the system is easy to fail in severe environments such as salt fog and humid environments, the fiber grating has small volume, is not interfered by electromagnetism, it is corrosion-resistant, characteristics such as stability height, when fiber grating strain received stress deformation, the wavelength will change, the change of wavelength is directly proportional relation with the change of stress, can calculate the dependent variable of pylon through the wavelength change that detects fiber grating strain sensor, moreover, different with traditional single system mode, this mode adopts each subsystem distributed unit data acquisition and processing, adopt the wireless transmission mode, reduce system internal interference, the reliability of data has been improved greatly.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
FIG. 1 is a schematic block diagram of a system for a tower load measuring module according to the present invention;
FIG. 2 is a system schematic block diagram of the tower top load measurement module of the present invention;
FIG. 3 is a schematic block diagram of a system for a load measurement module in a tower according to the present invention;
FIG. 4 is a system schematic block diagram of a tower bottom load measurement module of the present invention;
fig. 5 is a schematic block diagram of a system for measuring a signal receiving module according to the present invention.
In the figure, 1-tower load measuring module, 2-tower top load measuring module, 21-tower top grating optical fiber stress signal, 22-first signal demodulator, 23-first signal filter, 24-first data acquisition and processing module, 25-first signal amplifier, 26-first wireless transmitting module, 3-tower middle load measuring module, 31-tower grating optical fiber stress signal, 32-second signal demodulator, 33-second signal filter, 34-second data acquisition and processing module, 35-second signal amplifier, 36-second wireless transmitting module, 4-tower bottom load measuring module, 41-tower bottom grating optical fiber stress signal, 42-third signal demodulator, 43-third signal filter, 44-third data acquisition and processing module, 45-third signal amplifier, 46-third wireless transmitting module, 5-measuring signal receiving module, 51-wireless receiving module, 52-fourth signal amplifier, 53-collector, 54-PC, 55-remote viewing module and 56-monitoring system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1-5, an embodiment of the present invention provides a technical solution: a tower load measuring system of a wind generating set comprises a tower load measuring module 1, wherein the tower load measuring module 1 comprises a tower top load measuring module 2, a tower middle load measuring module 3, a tower bottom load measuring module 4 and a measuring signal receiving module 5, the output end of the tower top load measuring module 2 is connected with the input end of the measuring signal receiving module 5, the output end of the tower middle load measuring module 3 is connected with the input end of the measuring signal receiving module 5, the output end of the tower bottom load measuring module 4 is connected with the input end of the measuring signal receiving module 5, the tower top load measuring module 2 comprises a tower top grating optical fiber stress signal 21, a first signal demodulator 22, a first signal filter 23, a first data acquisition and processing module 24, a first signal amplifier 25 and a first wireless transmitting module 26, the output end of the tower top grating optical fiber stress signal 21 is connected with the input end of the first signal demodulator 22, the output end of the first signal demodulator 22 is connected with the input end of a first signal filter 23, the output end of the first signal filter 23 is connected with the input end of a first data acquisition and processing module 24, the output end of the first data acquisition and processing module 24 is connected with the input end of a first signal amplifier 25, the output end of the first signal amplifier 25 is connected with the input end of a first wireless transmission module 26, the in-tower load measurement module 3 comprises a grating optical fiber stress signal 31 in the tower, a second signal demodulator 32, a second signal filter 33, a second data acquisition and processing module 34, a second signal amplifier 35 and a second wireless transmission module 36, and the grating optical fiber stress signal 31 in the tower, a second signal demodulator 32, a second signal filter 33, a second data acquisition and processing module 34, a second signal amplifier 35 andthe output end of the fiber stress signal 31 is connected with the input end of a second signal demodulator 32, the output end of the second signal demodulator 32 is connected with the input end of a second signal filter 33, the output end of the second signal filter 33 is connected with the input end of a second data acquisition and processing module 34, the output end of the second data acquisition and processing module 34 is connected with the input end of a second signal amplifier 35, the output end of the second signal amplifier 35 is connected with the input end of a second wireless transmission module 36, the tower bottom load measurement module 4 comprises a tower bottom grating fiber stress signal 41, a third signal demodulator 42, a third signal filter 43, a third data acquisition and processing module 44, a third signal amplifier 45 and a third wireless transmission module 46, the output end of the tower bottom grating fiber stress signal 41 is connected with the input end of the third signal demodulator 42, the output end of the third signal demodulator 42 is connected with the input end of a third signal filter 43, the output end of the third signal filter 43 is connected with the input end of a third data acquisition and processing module 44, the output end of the third data acquisition and processing module 44 is connected with the input end of a third signal amplifier 45, the output end of the third signal amplifier 45 is connected with the input end of a third wireless sending module 46, the measurement signal receiving module 5 comprises a wireless receiving module 51, a fourth signal amplifier 52, a collector 53, a PC 54, a remote viewing module 55 and a monitoring system 56, the output end of the wireless receiving module 51 is connected with the input end of the fourth signal amplifier 52, the output end of the fourth signal amplifier 52 is connected with the input end of the collector 53, and the output end of the collector 53 is connected with the input end of the PC 54, the output end of the PC 54 is connected with the input end of the remote viewing module 55, the output end of the monitoring system 56 is connected with the input end of the PC 54, the output end of the monitoring system 56 is connected with the input end of the collector 53, the wireless receiving module 51, the fourth signal amplifier 52 and the collector 53 are connected through RS232 interfaces, the PC 54 is connected with the remote viewing module 55 through a wind field ring network switch, the collector 53 is connected with the monitoring system 56 through a PCB printed circuit board, and the tower top grating optical fiber stress signal 21, the tower grating optical fiber stress signal 31 and the tower bottom light are connected through the tower top grating optical fiber stress signal 21 and the tower middle grating optical fiber stress signal 31The grating optical fiber stress signals 41 are acquired by adopting optical fiber grating sensors, three groups of optical fiber grating sensors are installed in orthogonal X and Y directions of relative positions by taking zero degree of an engine room as a reference point, each optical fiber grating array comprises at least three grating optical fiber strain sensors which are connected in series, each group of optical fiber grating sensors comprises a reference value for measuring the ambient temperature and is used for compensating the temperature drift of the strain sensors caused by the change of the ambient temperature, and the obtained X-axis strain quantity is epsilon1、ε2The measured y-axis strain is epsilon3、ε4The calculation process is integrated into the load data processing module, and the data processing module has the main functions of preprocessing data, processing the strain value and the temperature drift value of each measurement point and using a formula Mx＝(M1-M2) /2 calculating bending moment M under test coordinate systemxAnd MyUsing the amount of strain epsilon1、ε2、ε3、ε4And the bending rigidity calculates the bending moment M under the x and y test coordinate system at the tower sectionxAnd MyWherein the section bending coefficient and bending rigidity are calculated according to the installation position, wherein DsFor the mounting position diameter, it is calculated by the following formula: dSD- (D-H) H/H, internal surface bending coefficient
Normal bending stress of M1，2＝Wziε. E, testing the bending moment M in the coordinate systemxAnd MyConverting into M of each section of the tower under the tower fixed coordinate systemtiltBending moment and MrollThe bending moment is calculated according to the formula:
Mroll＝Mx·cos(αyaw) A My·sin(αyaw)＝Mx，sinceαyaw＝0
Mtilt＝Mx·sin(αyaw)+My·cos(αyaw)＝My，sinceαyaw＝0，
The sum is a yaw azimuth angle, the main collector at the bottom of the tower mainly collects data, each measuring unit sends each calculated group sum to the collector 53 through wireless transmission, and the PC 54 performs statistical analysis and time sequence check on the data.
When the system works, each optical fiber array comprises three fiber bragg grating sensors which are connected in series, wherein one temperature sensor is included, temperature compensation is carried out in a mode that the temperature drift amount of a corresponding point is subtracted from strain data of the point, each group of bending moment signals comprises a demodulation module, the demodulation module has a photoelectric conversion function and a wavelength and strain information conversion function, the spectrum of the fiber bragg grating can be converted into an electric signal and sent to a data processing module, the data processing module is integrated and embedded into an acquisition system, each subsystem only keeps an original copy of statistical data of a single day statistical file, the reason of system failure searching in the future is convenient, the data amount is small, excessive storage burden cannot be caused on the subsystems, real-time data are written into the modules through programming, calculation formulas, coefficients, bending rigidity and the like are obtained, and the real-time load value is transmitted back to a PC 54 at the bottom of the, each subsystem supplies power and selects to get power on a tower drum 230V tower drum illumination terminal, the power can be supplied uninterruptedly, a demodulated strain signal is transmitted to a data processing function module through a signal filtering module, the data processing module processes and calculates the stress signal to obtain a stress data time sequence and ten-minute statistical data, the data are transmitted to a wireless transmitting module, a data acquisition and processing module is connected with a wireless module through RS232, each module can be set into terminal equipment or routing equipment through a wireless communication protocol to realize the establishment of a wireless network, a signal transmitting antenna can be installed on the wall of a tower through a sucker and is transmitted to a wireless receiving module at the bottom of the tower, a collector 53 combines load time sequences and a standard file with the maximum and minimum statistical average values of different subsystems through time synchronization of each subsystem and stores the standard file on a PC 54, the system of the collector 53 can be configured with channel information, communication interfaces and the like of each subsystem, the collector 53 is connected with the PC 54 by a serial port, the monitoring system 56 is divided into two parts of monitoring of the collector 53 and monitoring of the PC 54, one part is to check whether a wireless signal receiving and transmitting signal is normal through a PCB logic circuit, if a transmission signal is abnormal, a PCB board alarm is given, the PC 54 presets a program to monitor the PCB board information and then send a mail to a user in time and remotely, a singlechip can realize the operations of power-off restarting and the like of a remote control 24V power supply system to prevent data transmission blockage and collector crash problems, the other part is to monitor whether a time sequence file and a statistical file on the PC 54 are normally generated or not, whether the file in a folder is updated or not is monitored in real time, whether an EXE program file in a task manager is in operation or not is judged, if one is not satisfied, the PC 54 is connected to the booster station through the fan master switch, and data and real-time conditions of the PC 54 can be remotely checked through IP address allocation.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (1)
1. A wind generating set tower load measurement system comprises a tower load measurement module (1), and is characterized in that: the tower load measuring module (1) comprises a tower top load measuring module (2), a tower middle load measuring module (3), a tower bottom load measuring module (4) and a measuring signal receiving module (5), wherein the output end of the tower top load measuring module (2) is connected with the input end of the measuring signal receiving module (5), the output end of the tower middle load measuring module (3) is connected with the input end of the measuring signal receiving module (5), and the output end of the tower bottom load measuring module (4) is connected with the input end of the measuring signal receiving module (5); the tower top load measuring module (2) comprises a tower top grating optical fiber stress signal (21), a first signal demodulator (22), a first signal filter (23), a first data acquisition and processing module (24), a first signal amplifier (25) and a first wireless transmitting module (26), the output end of the tower top grating optical fiber stress signal (21) is connected with the input end of a first signal demodulator (22), the output of the first signal demodulator (22) is connected to the input of a first signal filter (23), the output end of the first signal filter (23) is connected with the input end of a first data acquisition and processing module (24), the output end of the first data acquisition and processing module (24) is connected with the input end of a first signal amplifier (25), the output end of the first signal amplifier (25) is connected with the input end of a first wireless transmission module (26); the tower load measurement module (3) comprises a tower grating optical fiber stress signal (31), a second signal demodulator (32), a second signal filter (33), a second data acquisition and processing module (34), a second signal amplifier (35) and a second wireless transmission module (36), the output end of the grating optical fiber stress signal (31) in the tower is connected with the input end of a second signal demodulator (32), the output of the second signal demodulator (32) is connected to the input of a second signal filter (33), the output end of the second signal filter (33) is connected with the input end of a second data acquisition and processing module (34), the output end of the second data acquisition and processing module (34) is connected with the input end of a second signal amplifier (35), the output end of the second signal amplifier (35) is connected with the input end of a second wireless sending module (36); the tower bottom load measuring module (4) comprises a tower bottom grating optical fiber stress signal (41), a third signal demodulator (42), a third signal filter (43), a third data acquisition and processing module (44), a third signal amplifier (45) and a third wireless transmitting module (46), the output end of the tower bottom grating optical fiber stress signal (41) is connected with the input end of a third signal demodulator (42), the output of the third signal demodulator (42) is connected to the input of a third signal filter (43), the output end of the third signal filter (43) is connected with the input end of a third data acquisition and processing module (44), the output end of the third data acquisition and processing module (44) is connected with the input end of a third signal amplifier (45), the output end of the third signal amplifier (45) is connected with the input end of a third wireless sending module (46); the measurement signal receiving module (5) comprises a wireless receiving module (51), a fourth signal amplifier (52), a collector (53), a PC (54), a remote viewing module (55) and a monitoring system (56), wherein the output end of the wireless receiving module (51) is connected with the input end of the fourth signal amplifier (52), the output end of the fourth signal amplifier (52) is connected with the input end of the collector (53), the output end of the collector (53) is connected with the input end of the PC (54), the output end of the PC (54) is connected with the input end of the remote viewing module (55), the output end of the monitoring system (56) is connected with the input end of the PC (54), and the output end of the monitoring system (56) is connected with the input end of the collector (53); the wireless receiving module (51), the fourth signal amplifier (52) and the collector (53) are all connected by RS232 interfaces; the PC (54) is connected with the remote viewing module (55) through a wind field ring network switch; the collector (53) and the monitoring system (56) are connected by adopting a PCB (printed circuit board).
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| CN110160682B (en) * | 2019-06-17 | 2021-06-04 | 三一重能股份有限公司 | Load monitoring system and method |
| CN114518295A (en) * | 2020-11-19 | 2022-05-20 | 中车株洲电力机车研究所有限公司 | Tower load measuring method, device and system |
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| CN101222523A (en) * | 2008-01-18 | 2008-07-16 | 南开大学 | Multi-parameter optical fiber optical grating wireless sensor network |
| CN203796505U (en) * | 2014-04-30 | 2014-08-27 | 中国大唐集团新能源股份有限公司 | Temperature and strain monitoring system for wind generating set |
| CN204984740U (en) * | 2015-09-07 | 2016-01-20 | 江苏欧讯能源科技有限公司 | Aerogenerator tower section of thick bamboo structure monitoring system |
| CN205260225U (en) * | 2015-12-29 | 2016-05-25 | 华电郑州机械设计研究院有限公司 | Long -range central monitoring system of health condition is synthesized to fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101983325B (en) * | 2008-03-31 | 2013-04-24 | 维斯塔斯风力系统集团公司 | Optical transmission strain sensor for wind turbines |
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| CN101222523A (en) * | 2008-01-18 | 2008-07-16 | 南开大学 | Multi-parameter optical fiber optical grating wireless sensor network |
| CN203796505U (en) * | 2014-04-30 | 2014-08-27 | 中国大唐集团新能源股份有限公司 | Temperature and strain monitoring system for wind generating set |
| CN204984740U (en) * | 2015-09-07 | 2016-01-20 | 江苏欧讯能源科技有限公司 | Aerogenerator tower section of thick bamboo structure monitoring system |
| CN205260225U (en) * | 2015-12-29 | 2016-05-25 | 华电郑州机械设计研究院有限公司 | Long -range central monitoring system of health condition is synthesized to fan |
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