CN111188742A - Wind generating set blade icing detection method based on optical fiber acceleration sensor - Google Patents
Wind generating set blade icing detection method based on optical fiber acceleration sensor Download PDFInfo
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- CN111188742A CN111188742A CN202010075712.5A CN202010075712A CN111188742A CN 111188742 A CN111188742 A CN 111188742A CN 202010075712 A CN202010075712 A CN 202010075712A CN 111188742 A CN111188742 A CN 111188742A
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- blade
- generating set
- wind generating
- icing
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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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/40—Ice detection; De-icing means
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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
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
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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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- Life Sciences & Earth Sciences (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind generating set blade icing detection method based on an optical fiber acceleration sensor, which comprises the following steps of: s1, measuring the natural frequency of the vibration of the wind generating set blade by adopting an optical fiber acceleration sensor; and S2, identifying the icing condition of the wind generating set blade by combining the SCADA data through the change of the natural frequency of the blade vibration. According to the invention, the natural frequency of the blade vibration of the wind generating set is measured by adopting the optical fiber acceleration sensor, and the blade icing condition is judged by combining SCADA data according to the variable quantity of the measured natural frequency of the blade, so that the reliability of the blade icing condition detection of the wind generating set is improved, the false alarm rate is reduced, and lightning strike can be avoided.
Description
Technical Field
The invention relates to a wind generating set blade icing detection method based on an optical fiber acceleration sensor, and belongs to the technical field of wind generating set blade icing detection.
Background
The influence of blade ice accumulation on the wind generating set is large, the wind generating set is shut down due to reduced yield if the wind generating set is light, and the blade is broken and even the whole wind generating set is scrapped if the wind generating set is heavy, so that the economic loss is large; in addition, the accumulated ice also causes certain potential safety hazards, such as people injury caused by ice throwing. Research shows that accumulated ice in an icing environment is mainly distributed on the front edge part of the blade, and the blade tip part belongs to a key ice accumulation area. Blade airfoils within 30% of the length from the blade tip can affect over 90% of the aerodynamic performance of the entire blade, and therefore it is necessary to detect blade icing conditions.
At present, some technologies have been implemented to detect the blade icing condition of a wind turbine generator system, such as [1] "lufang" fan blade icing monitoring and anti-icing and de-icing test research [ D ]. university of Hunan, 2014. ", [2 ]" Liningbo, Yan Tan, Liminocp, and the like [ J ] power generation and air conditioning, 2018(1):58-62. ", [3 ]" Method for testing a rotor blade detection system as a well as a rotor blade for carrying out the Method 2018-08-28US 14/806420 ", but in the document [1], the piezoelectric sensor is adhered to the surface of the blade, the blade frequency is detected by using a wave propagation method, icing monitoring is further carried out, the reliability is general, the false alarm rate is high, and the lightning protection performance is poor; the file [2] only judges whether the ice is frozen or not through SCADA data, and indirectly analyzes, so that the reliability of the data is general and hysteresis exists; the document [3] monitors the blade icing condition by detecting the frequency changes of acceleration, elongation, bending torque or bending stroke and the like, and has high false alarm rate and poor lightning protection performance.
Disclosure of Invention
The invention aims to provide a wind generating set blade icing detection method based on an optical fiber acceleration sensor, which can effectively solve the problems in the prior art, particularly the problems of general reliability, higher false alarm rate and poorer lightning protection performance when the wind generating set blade icing condition is detected.
In order to solve the technical problems, the invention adopts the following technical scheme: the method for detecting the blade icing of the wind generating set based on the optical fiber acceleration sensor comprises the following steps:
s1, measuring the natural frequency of the vibration of the wind generating set blade by adopting an optical fiber acceleration sensor;
and S2, identifying the icing condition of the wind generating set blade by combining the SCADA data through the change of the natural frequency of the blade vibration.
The wind generating set blade icing detection method based on the optical fiber acceleration sensor further comprises the following steps:
and S3, simulating the relationship between the blade icing quality of the wind generating set and the natural frequency of the vibration of the measured blade, so as to determine the blade icing quality in real time according to the natural frequency of the vibration of the blade of the wind generating set measured in real time.
Preferably, the blade icing quality is determined in particular by the following method:
s31, determining a blade icing model;
s32, simulating vibration data of the position of the optical fiber acceleration sensor on the blade when the blade is not frozen (by using dynamic simulation software), and confirming the frequency f0 of the blade through spectrum analysis;
s33, simulating the frequency f10 when the icing mass delta m of each blade is 10kg, and subtracting f10 from f0 to obtain delta f10；
S34, respectively simulating and obtaining frequencies f20, f30, … … and fN of the blades when the icing mass delta m is 20kg, 30kg, … … and Nkg at intervals of 10kg, and respectively subtracting f20, f30, … … and fN from f0 to obtain a series of delta f;
s35, obtaining a relation table between the delta m and the delta f through cubic spline interpolation;
and S36, confirming the blade icing event by combining the SCADA data, and then comparing the relation table between the delta m and the delta f to obtain the blade icing quality.
Through the method, the icing quality of the blade can be determined simply and reliably through a table look-up method. In addition, the simulation is respectively carried out at intervals of 10kg, so that the simulation times and the icing amount can be balanced, the simulation times are small, and the icing detection judgment is accurate.
More preferably, the blade Icing model is determined according to DNVGL-RP-0175Icing of wind turbines, so that the blade Icing process of the generator set can be described more strictly and more dependently.
More preferably, N is equal to 200, so that all icing detection requirements can be met.
According to the wind generating set blade icing detection method based on the optical fiber acceleration sensor, when the natural frequency of the blade vibration of the wind generating set is measured, the optical fiber acceleration sensor is installed at the position with the largest relative amplitude of the 2-order natural vibration mode of the blade, so that the signal to noise ratio of a signal is the highest, and the measurement accuracy of the optical fiber acceleration sensor can be further improved.
In the present invention, the SCADA data includes: temperature, humidity, blade speed, wind speed.
Compared with the prior art, the method has the advantages that the natural frequency of the blade vibration of the wind generating set is measured by adopting the optical fiber acceleration sensor, and the blade icing condition is judged by combining SCADA data according to the variable quantity of the natural frequency of the measured blade, so that the reliability of the blade icing condition detection of the wind generating set is improved, the false alarm rate is reduced, the lightning strike can be avoided, and the cost is low. In addition, the scheme of the invention detects the icing condition of the blades of the generator set through real-time analysis, and overcomes the problem of hysteresis in the prior art. Finally, the invention can also determine the concrete icing quality, thereby starting the deicing program, improving the aerodynamic characteristics of the blade and increasing the power generation capacity; or the machine is shut down, and the protection unit has faults, such as unbalanced impeller, tower sweeping, broken blade and the like.
Drawings
FIG. 1 is a schematic flow chart of a method according to an embodiment of the present invention.
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Detailed Description
The embodiment of the invention comprises the following steps: a wind generating set blade icing detection method based on an optical fiber acceleration sensor is shown in figure 1 and comprises the following steps:
s1, measuring the natural frequency of the vibration of the wind generating set blade by adopting an optical fiber acceleration sensor;
and S2, identifying the icing condition of the wind generating set blade by combining the SCADA data through the change of the natural frequency of the blade vibration.
In order to obtain a specific icing quality, the method of the invention further comprises:
and S3, simulating the relationship between the blade icing quality of the wind generating set and the natural frequency of the vibration of the measured blade, so as to determine the blade icing quality in real time according to the natural frequency of the vibration of the blade of the wind generating set measured in real time.
The blade icing quality can be determined in particular by the following method:
s31, determining a blade icing model;
s32, simulating vibration data of the position of the optical fiber acceleration sensor on the blade when the blade is not frozen (by using dynamic simulation software), and confirming the frequency f0 of the blade through spectrum analysis;
s33, simulating the frequency f10 when the icing mass delta m of each blade is 10kg, and subtracting f10 from f0 to obtain delta f10；
S34, respectively simulating and obtaining frequencies f20, f30, … … and fN of the blades when the icing mass delta m is 20kg, 30kg, … … and Nkg at intervals of 10kg, and respectively subtracting f20, f30, … … and fN from f0 to obtain a series of delta f;
s35, obtaining a relation table between the delta m and the delta f through cubic spline interpolation;
and S36, confirming the blade icing event by combining the SCADA data, and then comparing the relation table between the delta m and the delta f to obtain the blade icing quality.
In the above method, the step S34 may be performed at intervals of other values, for example, at intervals of 5kg, but this makes it impossible to balance the number of measurements and the accuracy, resulting in a large number of measurements.
Specifically, the blade Icing model may be determined from DNVGL-RP-0175Icing of wind turbines.
Said N may be equal to 200 (generally icing will not exceed 200 kg).
In order to further improve the measurement precision, when the natural frequency of the blade vibration of the wind generating set is measured, the optical fiber acceleration sensor is installed at the position where the relative amplitude of the 2-order natural vibration mode of the blade is maximum. (may be installed elsewhere, but may reduce the accuracy of icing detection)
The SCADA data in the invention comprises: temperature, humidity, blade speed, wind speed.
Claims (7)
1. The wind generating set blade icing detection method based on the optical fiber acceleration sensor is characterized by comprising the following steps of:
s1, measuring the natural frequency of the vibration of the wind generating set blade by adopting an optical fiber acceleration sensor;
and S2, identifying the icing condition of the wind generating set blade by combining the SCADA data through the change of the natural frequency of the blade vibration.
2. The wind generating set blade icing detection method based on the optical fiber acceleration sensor is characterized by further comprising the following steps of:
and S3, simulating the relationship between the blade icing quality of the wind generating set and the natural frequency of the vibration of the measured blade, so as to determine the blade icing quality in real time according to the natural frequency of the vibration of the blade of the wind generating set measured in real time.
3. The wind generating set blade icing detection method based on the optical fiber acceleration sensor is characterized in that the blade icing quality is determined by the following method:
s31, determining a blade icing model;
s32, simulating vibration data of the position of the optical fiber acceleration sensor on the blade when the blade is not frozen, and confirming the natural frequency f0 of the blade through spectral analysis;
s33, simulating the natural frequency f10 when the icing mass delta m of each blade is 10kg, and subtracting f10 from f0 to obtain delta f10；
S34, respectively simulating to obtain natural frequencies f20, f30, … … and fN of the blades when the icing mass delta m is 20kg, 30kg, … … and Nkg at intervals of 10kg, and respectively subtracting f20, f30, … … and fN from f0 to obtain a series of delta f;
s35, obtaining a relation table between the delta m and the delta f through cubic spline interpolation;
and S36, confirming the blade icing event by combining the SCADA data, and then comparing the relation table between the delta m and the delta f to obtain the blade icing quality.
4. The wind generating set blade Icing detection method based on the optical fiber acceleration sensor is characterized in that a blade Icing model is determined according to DNVGL-RP-0175Icing of wind turbines.
5. The method for detecting blade icing of a wind generating set based on an optical fiber acceleration sensor as claimed in claim 3, wherein N is equal to 200.
6. The wind generating set blade icing detection method based on the optical fiber acceleration sensor is characterized in that when the natural frequency of the blade vibration of the wind generating set is measured, the optical fiber acceleration sensor is installed at the position where the relative amplitude of the 2 nd order natural mode of the blade is maximum.
7. The wind generating set blade icing detection method based on the optical fiber acceleration sensor according to claim 1, wherein the SCADA data comprises: temperature, humidity, blade speed, wind speed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010075712.5A CN111188742A (en) | 2020-01-22 | 2020-01-22 | Wind generating set blade icing detection method based on optical fiber acceleration sensor |
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| CN202010075712.5A CN111188742A (en) | 2020-01-22 | 2020-01-22 | Wind generating set blade icing detection method based on optical fiber acceleration sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404652A (en) * | 2021-06-09 | 2021-09-17 | 东方电气集团科学技术研究院有限公司 | Method for monitoring state of blade of wind generating set in severe environment |
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| CN206221146U (en) * | 2016-10-24 | 2017-06-06 | 广州特种承压设备检测研究院 | Offshore wind generating and its blade protection and blade tip damage-proof device |
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| CN107100802A (en) * | 2017-04-26 | 2017-08-29 | 浙江运达风电股份有限公司 | A kind of wind generator set blade ice carries operation safety control method and system |
| CN209659007U (en) * | 2019-01-21 | 2019-11-19 | 广东电网有限责任公司 | Grid power transmission route ice covering monitoring system |
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2020
- 2020-01-22 CN CN202010075712.5A patent/CN111188742A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102042885A (en) * | 2010-10-08 | 2011-05-04 | 电子科技大学 | Device for monitoring state of power transmission line tower-line system |
| CN107002639A (en) * | 2014-12-04 | 2017-08-01 | 福斯4X股份有限公司 | For the rotor blade and the section bar of rotor blade of the method, the method for recognizing the ice on wind turbine, the acceleration transducer for rotor blade including the acceleration transducer that monitor wind turbine |
| CN106351807A (en) * | 2015-07-15 | 2017-01-25 | 成都阜特科技股份有限公司 | Wind turbine generator set blade coated ice removal method and ice removal system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113404652A (en) * | 2021-06-09 | 2021-09-17 | 东方电气集团科学技术研究院有限公司 | Method for monitoring state of blade of wind generating set in severe environment |
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Application publication date: 20200522 |