CN111075646A - Overspeed safety control device for wind driven generator - Google Patents
Overspeed safety control device for wind driven generator Download PDFInfo
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- CN111075646A CN111075646A CN201811229287.XA CN201811229287A CN111075646A CN 111075646 A CN111075646 A CN 111075646A CN 201811229287 A CN201811229287 A CN 201811229287A CN 111075646 A CN111075646 A CN 111075646A
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- hub
- control system
- rotating speed
- variable pitch
- sensor
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- 238000005259 measurement Methods 0.000 claims abstract description 18
- 230000001133 acceleration Effects 0.000 claims description 48
- 238000004891 communication Methods 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000003746 feather Anatomy 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
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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
- F03D7/00—Controlling wind motors
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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
- F05B2270/10—Purpose of the control system
- F05B2270/101—Purpose of the control system to control rotational speed (n)
- F05B2270/1011—Purpose of the control system to control rotational speed (n) to prevent overspeed
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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
- F05B2270/328—Blade pitch angle
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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
Abstract
The application discloses aerogenerator overspeed safety control device includes: the sensor is arranged in a hub of the wind driven generator and connected with the variable pitch control system and used for measuring the operation parameters of the hub to obtain a measurement result; the variable pitch control system is arranged in the hub and used for obtaining the rotating speed of the hub by using the measuring result obtained by the sensor and judging whether the rotating speed exceeds a preset rotating speed threshold value or not; if yes, stopping the machine for feathering; the variable pitch control system is directly connected with the sensor, the variable pitch control system has the calculation and judgment capabilities on the measurement result of the sensor, and the variable pitch control system integrates the functions of variable pitch, speed measurement and judgment on overspeed, so that after the sensor sends the measurement result to the variable pitch control system, the variable pitch control system can directly judge whether shutdown feathering is needed, the uncertainty that a master control command caused by a long communication path is transmitted to the variable pitch system is reduced, and the stability and the reliability of the system are improved.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to an overspeed safety control device for a wind driven generator.
Background
The existing unit main control system is positioned in a cabin, the rotating speed of a hub can be detected through an encoder, whether the unit is overspeed or not can be judged through software setting, if the unit is overspeed, a shutdown command is transmitted to a variable pitch control system through communication, meanwhile, a safety chain from the cabin to the variable pitch system in the hub is disconnected, and shutdown feathering is realized through the variable pitch system; according to the method, under the condition that the communication fault is caused by bonding of a safety chain relay from a cabin to a hub, the variable pitch system cannot receive an overspeed shutdown command from a master control, the unit has the risk of overspeed runaway, meanwhile, the main control system detects and judges a rotating speed signal and transmits the shutdown command to the variable pitch system through the slip ring to execute feathering shutdown actions, a complex transmission process is carried out in the middle, and the uncertainty is large.
For this reason, a more reliable overspeed safety control apparatus for a wind turbine is required.
Disclosure of Invention
In view of this, the present invention provides an overspeed safety control device for a wind turbine generator, which improves the stability and reliability of the system. The specific scheme is as follows:
an overspeed safety control device for wind power generator, comprising:
the sensor is arranged in a hub of the wind driven generator and connected with the variable pitch control system and used for measuring the operation parameters of the hub to obtain a measurement result;
the variable pitch control system is arranged in the hub and used for obtaining the rotating speed of the hub by using the measuring result obtained by the sensor and judging whether the rotating speed of the hub exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
Optionally, the sensor is an acceleration sensor for measuring an acceleration of the hub.
Optionally, the pitch control system is specifically configured to obtain a time interval between a maximum value and a minimum value of the accelerations of the adjacent hubs by using the acceleration of the hub obtained by the acceleration sensor, and obtain the rotation speed of the hub by using the time interval and the circumference of the hub.
Optionally, the pitch control system includes a plurality of pitch controllers corresponding to each blade of the wind turbine one to one;
the acceleration sensor comprises a plurality of acceleration sub-sensors which correspond to the variable pitch controllers one by one;
the variable pitch controller is used for obtaining the rotating speed of the hub by utilizing the acceleration of the hub obtained by the corresponding acceleration sub-sensor and judging whether the rotating speed of the hub exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
Optionally, the pitch controllers are connected through a safety chain, and when any pitch controller stops feathering, the rest pitch controllers stop feathering.
Optionally, the method further includes:
a hub rotational speed encoder that detects a rotational speed of the hub;
the main control system is respectively connected with the hub rotating speed encoder and the variable pitch control system and is used for judging whether the rotating speed of the hub is a preset rotating speed threshold value or not by utilizing the rotating speed of the hub measured by the hub rotating speed encoder; and if so, controlling the variable pitch control system to stop feathering.
In the present invention, the overspeed safety control device for wind power generator comprises: the sensor is arranged in a hub of the wind driven generator and connected with the variable pitch control system and used for measuring the operation parameters of the hub to obtain a measurement result; the variable pitch control system is arranged in the hub and used for obtaining the rotating speed of the hub by using the measuring result obtained by the sensor and judging whether the rotating speed exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
The variable pitch control system is directly connected with the sensor, the variable pitch control system has the capability of calculating and judging the measurement result of the sensor, and the variable pitch control system integrates the functions of variable pitch, speed measurement and judgment on overspeed, so that after the measurement result is sent to the variable pitch control system by the sensor, the variable pitch control system can directly judge whether the feathering is required to be stopped, and the main control system is not required to judge whether the feathering is required to be stopped, thereby reducing the fault occurrence rate caused by a longer communication path and improving the stability and reliability of the system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an overspeed safety control device of a wind turbine generator according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another overspeed safety control apparatus for wind turbine generator according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another overspeed safety control apparatus for wind power generator according to an embodiment of the present invention.
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.
The embodiment of the invention discloses an overspeed safety control device for a wind driven generator, which comprises the following components in percentage by weight as shown in figure 1:
the sensor 1 is arranged in a hub of the wind driven generator and connected with the variable pitch control system 2 and is used for measuring the operation parameters of the hub to obtain a measurement result;
the variable pitch control system 2 is arranged in the hub and used for obtaining the rotating speed of the hub by using the measuring result obtained by the sensor 1 and judging whether the rotating speed of the hub exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
Specifically, the sensor 1 is installed in a hub of the wind driven generator and is directly connected with the variable pitch control system 2 in the hub, so that the variable pitch control system 2 can directly receive a measurement result obtained by measuring the operation parameters of the hub by the sensor 1, the variable pitch control system 2 can obtain the rotating speed of the hub according to the measurement result by using a processor of the variable pitch control system 2, and then whether the rotating speed of the hub exceeds a preset rotating speed threshold value is judged, so that whether the wind driven generator is overspeed or not is judged, if so, the variable pitch control system 2 is stopped and feathered, so that the wind driven generator is not damaged due to overspeed, the judgment result is not required to be sent to the variable pitch control system 2 through equipment such as a slip ring or a main controller, the complexity of the system is reduced, and the possibility of fault.
The sensor 1 may be an acceleration sensor, an encoder, an angular velocity sensor, or the like, which can measure relevant parameters reflecting the rotation speed of the hub.
Therefore, in the embodiment of the invention, the variable pitch control system 2 is directly connected with the sensor 1, the variable pitch control system 2 has the capability of calculating and judging the measurement result of the sensor 1, and the variable pitch control system 2 integrates the functions of variable pitch, speed measurement and judgment on overspeed, so that after the measurement result is sent to the variable pitch control system 2 by the sensor 1, the variable pitch control system 2 can directly judge whether the machine is required to be stopped for feathering, the master control system is not required to judge whether the machine is required to be stopped for feathering, the fault occurrence rate caused by a longer communication path is reduced, and the stability and the reliability of the system are improved.
The embodiment of the invention also discloses a specific overspeed safety control device of the wind driven generator, and compared with the previous embodiment, the embodiment further explains and optimizes the technical scheme. Referring to fig. 2, specifically:
the sensor 1 may be an acceleration sensor for measuring the acceleration of the hub 3; the acceleration sensor sends the acceleration of each position and each moment when the hub 3 rotates for one circle to the variable pitch control system 2 in real time.
Specifically, in the rotating hub 3, the acceleration sensor measures the acceleration of the hub 3 to approximately periodically change along with the rotation of the hub 3, the acceleration value is approximately a sine curve, the acceleration sensor rotates to the highest point in the vertical direction in each period, namely when the gravity acceleration and the centripetal force are in the same direction, and the lowest point, namely when the gravity acceleration and the centripetal force are in the opposite direction, the acceleration value is respectively the maximum value and the minimum value of the acceleration, the accelerations of the hub 3 in the directions of X, Y and Z3 in the running process of the unit are continuously collected, the resultant acceleration of the hub 3 is calculated, and the resultant acceleration of the hub 3 is sent to the pitch control system 2 by the acceleration sensor.
Specifically, the pitch control system 2 obtains the acceleration of the hub 3, that is, the resultant acceleration of the hub 3, by using the acceleration sensor, obtains the points of the maximum value and the minimum value of the acceleration of the hub 3 in one rotation period by judging the variation of the resultant acceleration, and after determining the points of the maximum value and the minimum value of the acceleration, can obtain the time interval between the maximum value and the minimum value of the acceleration of the hub 3, and can obtain the rotation speed of the hub 3 by using the time interval and one-half of the circumference of the hub 3; at this time, the pitch control system 2 can compare the obtained rotating speed of the hub 3 with the rotating speed threshold value, if the rotating speed of the hub 3 is less than or equal to the rotating speed threshold value, it is proved that overspeed is not performed, if the rotating speed of the hub 3 is greater than the rotating speed threshold value, it is proved that overspeed is performed, and at this time, the pitch control system 2 can perform shutdown feathering.
It will be appreciated that each blade of the wind turbine may comprise a single pitch controller 21, and the pitch control system 2 may be a system comprising a plurality of pitch controllers 21 corresponding to each blade of the wind turbine, and the upper acceleration sensor comprises a plurality of acceleration sub-sensors 11 corresponding to each pitch controller 21, and each acceleration sub-sensor 11 transmits the measurement result to the corresponding pitch controller 21.
Each variable pitch controller 21 is configured to obtain the rotational speed of the hub 3 by using the acceleration of the hub 3 obtained by the corresponding acceleration sub-sensor 11 and by using the rotational speed calculation method, and determine whether the rotational speed of the hub 3 exceeds a preset rotational speed threshold; if so, stopping feathering.
The embodiment of the invention also discloses an overspeed safety control device of the wind driven generator, which is shown in figure 3 and comprises:
specifically, in order to ensure that each pitch controller 21 in the pitch control system 2 can act simultaneously, the pitch controllers 21 are connected through a safety chain, when any pitch controller 21 stops feathering, the rest pitch controllers 21 stop feathering, and therefore even if the measurement results of different acceleration sub-sensors 11 are different or the time for obtaining the results of the pitch controllers 21 is different, the shutdown feathering operation can be carried out uniformly, and the asynchronous situation cannot occur.
Further, in order to ensure the reliability of the wind power generator, a redundancy system is added, and the wind power generator further comprises:
a hub rotational speed encoder 7 that detects the rotational speed of the hub 3;
the variable pitch control system is respectively connected with the hub rotating speed encoder 7 and the variable pitch control system 2 and is used for judging whether the rotating speed of the hub 3 is a preset rotating speed threshold value or not by utilizing the rotating speed of the hub 3 measured by the hub rotating speed encoder 7; and if so, controlling the pitch control system 2 to stop feathering.
Specifically, under the condition of adding a sensor 1 directly connected with the variable pitch control system 2, the original structure of controlling the variable pitch control system 2 by the hub rotating speed encoder 7 and the main control system 6 is continuously kept, namely, a hub rotating speed encoder 7, a main control system 6 and a slip ring 5 are arranged in the nacelle 4, the main control system 6 is connected with a variable pitch control system 2 in the hub 3 through the slip ring 6, simultaneously, the two systems operate simultaneously, when any system detects overspeed, the variable pitch control system 2 can stop and feather to form a redundant system, thereby further improving the reliability of the wind driven generator, meanwhile, in order to ensure that the pitch control system 2 and the main control system 6 can act simultaneously when the pitch control system 2 or the main control system 6 judges that shutdown feathering is required, a safety chain exists in each of the main control system 6, the slip ring 5 and the pitch controller 21 in the pitch control system 2.
Finally, it should also be 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The overspeed safety control device of the wind driven generator provided by the invention is described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. An overspeed safety control device for wind power generator, comprising:
the sensor is arranged in a hub of the wind driven generator and connected with the variable pitch control system and used for measuring the operation parameters of the hub to obtain a measurement result;
the variable pitch control system is arranged in the hub and used for obtaining the rotating speed of the hub by using the measuring result obtained by the sensor and judging whether the rotating speed of the hub exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
2. Wind turbine overspeed safety control according to claim 1, characterized in that said sensor is an acceleration sensor for measuring the acceleration of said hub.
3. The wind turbine overspeed safety control apparatus of claim 2, wherein the pitch control system is specifically configured to obtain a time interval between a maximum value and a minimum value of the acceleration of the adjacent hub by using the acceleration of the hub obtained by the acceleration sensor, and obtain the rotation speed of the hub by using the time interval and the circumference of the hub.
4. The wind turbine overspeed safety control of claim 3, wherein said pitch control system comprises a plurality of pitch controllers in one-to-one correspondence with each blade of said wind turbine;
the acceleration sensor comprises a plurality of acceleration sub-sensors which correspond to the variable pitch controllers one by one;
the variable pitch controller is used for obtaining the rotating speed of the hub by utilizing the acceleration of the hub obtained by the corresponding acceleration sub-sensor and judging whether the rotating speed of the hub exceeds a preset rotating speed threshold value or not; if so, stopping feathering.
5. The overspeed safety control device of wind-driven generator according to claim 4, characterized in that the pitch controllers are connected by a safety chain, when any pitch controller is stopped for feathering, the rest pitch controllers are stopped for feathering.
6. Wind turbine overspeed safety control according to any of claims 1 to 5, characterized by further comprising:
a hub rotational speed encoder that detects a rotational speed of the hub;
the main control system is respectively connected with the hub rotating speed encoder and the variable pitch control system and is used for judging whether the rotating speed of the hub is a preset rotating speed threshold value or not by utilizing the rotating speed of the hub measured by the hub rotating speed encoder; and if so, controlling the variable pitch control system to stop feathering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229287.XA CN111075646A (en) | 2018-10-22 | 2018-10-22 | Overspeed safety control device for wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811229287.XA CN111075646A (en) | 2018-10-22 | 2018-10-22 | Overspeed safety control device for wind driven generator |
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| Publication Number | Publication Date |
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| CN111075646A true CN111075646A (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811229287.XA Pending CN111075646A (en) | 2018-10-22 | 2018-10-22 | Overspeed safety control device for wind driven generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761872A (en) * | 2021-01-25 | 2021-05-07 | 三一重能股份有限公司 | Wind power variable pitch overspeed protection method and device and wind power variable pitch system |
| CN113153631A (en) * | 2021-04-09 | 2021-07-23 | 北京国电思达科技有限公司 | Overspeed prevention system and method for impeller of wind turbine generator |
| CN113623135A (en) * | 2021-09-15 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
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| US20120134807A1 (en) * | 2011-11-29 | 2012-05-31 | Ulf Axelsson | Method for preventing rotor overspeed of a wind turbine |
| CN104405582A (en) * | 2014-11-13 | 2015-03-11 | 湖南世优电气股份有限公司 | Wheel hub safety chain of megawatt wind generating set and control method thereof |
| CN105240214A (en) * | 2015-11-13 | 2016-01-13 | 天津瑞源电气有限公司 | Safety circuit for overspeed protection of wind turbine generating set |
| CN107735569B (en) * | 2014-12-04 | 2020-05-05 | 福斯4X股份有限公司 | Method for individual deflection control of rotor blades of a wind turbine and wind turbine |
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2018
- 2018-10-22 CN CN201811229287.XA patent/CN111075646A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120134807A1 (en) * | 2011-11-29 | 2012-05-31 | Ulf Axelsson | Method for preventing rotor overspeed of a wind turbine |
| CN104405582A (en) * | 2014-11-13 | 2015-03-11 | 湖南世优电气股份有限公司 | Wheel hub safety chain of megawatt wind generating set and control method thereof |
| CN107735569B (en) * | 2014-12-04 | 2020-05-05 | 福斯4X股份有限公司 | Method for individual deflection control of rotor blades of a wind turbine and wind turbine |
| CN105240214A (en) * | 2015-11-13 | 2016-01-13 | 天津瑞源电气有限公司 | Safety circuit for overspeed protection of wind turbine generating set |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761872A (en) * | 2021-01-25 | 2021-05-07 | 三一重能股份有限公司 | Wind power variable pitch overspeed protection method and device and wind power variable pitch system |
| CN113153631A (en) * | 2021-04-09 | 2021-07-23 | 北京国电思达科技有限公司 | Overspeed prevention system and method for impeller of wind turbine generator |
| CN113623135A (en) * | 2021-09-15 | 2021-11-09 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
| CN113623135B (en) * | 2021-09-15 | 2022-09-27 | 中国船舶重工集团海装风电股份有限公司 | Overspeed-preventing shutdown control method for wind turbine generator |
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Application publication date: 20200428 |
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