CN117249040A - Wind wheel rotating speed control method and system for ultra-high flexible wind power tower - Google Patents
Wind wheel rotating speed control method and system for ultra-high flexible wind power tower Download PDFInfo
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- CN117249040A CN117249040A CN202311087035.9A CN202311087035A CN117249040A CN 117249040 A CN117249040 A CN 117249040A CN 202311087035 A CN202311087035 A CN 202311087035A CN 117249040 A CN117249040 A CN 117249040A
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- 230000001133 acceleration Effects 0.000 claims description 30
- 238000003466 welding Methods 0.000 description 6
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- 238000012986 modification Methods 0.000 description 3
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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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Abstract
The invention relates to the technical field of wind power towers, and discloses a method and a system for controlling the rotational speed of a wind wheel of an ultra-high flexible wind power tower, which are used for acquiring the real-time wind speed of the position of a wind power generator and calculating the safe rotational speed of the wind wheel according to the real-time wind speed; collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the first rotating speed and the safe rotating speed; when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not; if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve; if the wind wheel does not have resonance risk, the wind wheel is controlled to enter an active rotation speed reduction mode, and by adopting different wind wheel rotation speed control modes, the invention further realizes accurate and effective control of the rotation speed of the wind wheel of the ultra-high flexible wind power tower, ensures the stable operation of the wind wheel, and further ensures the safety of the fan.
Description
Technical Field
The invention relates to the technical field of wind power towers, in particular to a method and a system for controlling the rotational speed of a wind wheel of an ultra-high flexible wind power tower.
Background
The wind power tower is a tower pole of wind power generation, mainly plays a supporting role in a wind power generator set, and absorbs the vibration of the set. The production process flow of the wind power tower is generally as follows: the method comprises the steps of blanking by a numerical control cutting machine, chamfering a thick plate, spot welding, positioning, welding inner and outer longitudinal joints after plate bending by a plate bending machine is needed, carrying out roundness inspection, carrying out secondary roundness comparison if a problem exists, carrying out assembly-to-point welding on a roller frame by a hydraulic assembly after welding a single-section cylinder, carrying out tolerance inspection such as inner and outer circumferential joints, straightness and the like, carrying out nondestructive inspection and flatness inspection on a welding line after welding a flange, carrying out sand blasting and paint spraying treatment, and carrying out transportation to an installation site after finishing internal part installation and finished product inspection.
The wind wheel is one of the core components of the wind generating set, and the reliable operation of the wind wheel is a powerful guarantee for the normal operation of the wind generating set. The traditional wind wheel rotating speed detection is carried out on the cabin side of the fan by installing rotating speed detection devices such as an encoder or a rotating speed sensor on a low-speed shaft, and the monitoring data are uploaded to a main control system to carry out wind wheel rotating speed overspeed judgment and are transmitted to a control encoder through a slip ring. However, because the control encoder is easy to be interfered, the unit is stopped due to the fact that the wind wheel is frequently reported by mistake to be overspeed, the stability of the unit is affected, the control encoding is high in price and high in maintenance cost, and when the rotating speed is low, the control encoding test error is larger, so that the safety of the fan is affected.
Therefore, how to provide a control method and a system for the rotating speed of the wind wheel of the ultra-high flexible wind power tower is a technical problem to be solved at present.
Disclosure of Invention
The embodiment of the invention provides a method and a system for controlling the rotating speed of an ultra-high flexible wind power tower wind wheel, which are used for solving the technical problems that the rotating speed of the ultra-high flexible wind power tower wind wheel cannot be accurately and effectively controlled, the stable operation of the wind wheel cannot be ensured, and the safety of a fan cannot be ensured in the prior art.
In order to achieve the above purpose, the invention provides a method for controlling the rotational speed of a wind wheel of an ultra-high flexible wind power tower, which comprises the following steps:
acquiring a real-time wind speed of a position where a wind driven generator is located, and calculating a safe rotating speed of the wind wheel according to the real-time wind speed;
collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not based on the rotation speed difference value;
if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve;
and if the wind wheel does not have resonance risk, controlling the wind wheel to enter an active rotation speed reduction mode.
In one embodiment, the safe rotational speed of the rotor is calculated according to the following formula:
wherein w (k) is the safe rotation speed of the wind wheel, lambda opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
In one embodiment, when collecting the first rotational speed of the wind wheel and determining whether the wind wheel is in a safe rotational speed range based on a relationship between the first rotational speed and the safe rotational speed, the method includes:
when the first rotation speed is smaller than or equal to the safety rotation speed, judging that the wind wheel is in a safety rotation speed range;
and when the first rotating speed is larger than the safety rotating speed, judging that the wind wheel is not in the safety rotating speed range.
In one embodiment, when determining a rotational speed difference of the wind wheel according to the first rotational speed and the second rotational speed, and judging whether the wind wheel has resonance risk based on the rotational speed difference, the method includes:
when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value, determining that resonance risk exists;
and when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel, determining that resonance risk exists.
In one embodiment, when the wind wheel is controlled to enter the active rotation speed reduction mode, the method comprises the following steps:
determining a deceleration trend of the wind wheel, and determining an active rotation speed reduction condition based on the deceleration trend of the wind wheel;
determining a blade axis acceleration of the wind turbine;
determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
determining the active derate condition according to:
wherein,the acceleration of the blade shaft of the wind wheel;
calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
In order to achieve the above object, the present invention provides a wind wheel rotation speed control system of an ultra-high flexible wind power tower, the system comprising:
the acquisition module is used for acquiring the real-time wind speed of the position where the wind driven generator is located and calculating the safe rotating speed of the wind wheel according to the real-time wind speed;
the acquisition module is used for acquiring the first rotating speed of the wind wheel and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
the judging module is used for acquiring a second rotating speed of the wind wheel in a preset time when the wind wheel is not in a safe rotating speed range, determining a rotating speed difference value of the wind wheel according to the first rotating speed and the second rotating speed, and judging whether the wind wheel has resonance risk or not based on the rotating speed difference value;
the control module is used for controlling the rotating speed of the wind wheel based on a preset rotating speed-torque control curve if the wind wheel has resonance risk;
and the wind wheel is also used for controlling the wind wheel to enter an active rotation speed reduction mode if the wind wheel does not have resonance risk.
In one embodiment, the acquiring module is specifically configured to:
the acquisition module is used for calculating the safe rotation speed of the wind wheel according to the following formula:
wherein w (k) is wind wheelLambda of the safe rotational speed of (1) opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
In one embodiment, the acquisition module is specifically configured to:
the acquisition module is used for judging that the wind wheel is in a safe rotating speed range when the first rotating speed is smaller than or equal to the safe rotating speed;
and the acquisition module is used for judging that the wind wheel is not in the safe rotating speed range when the first rotating speed is larger than the safe rotating speed.
In one embodiment, the judging module is specifically configured to:
the judging module is used for determining that resonance risk exists when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value;
the judging module is used for determining that resonance risks exist when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel.
In one embodiment, the control module is specifically configured to:
the control module is used for determining the deceleration trend of the wind wheel and determining the active rotation speed reduction condition based on the deceleration trend of the wind wheel;
the control module is used for determining the blade shaft acceleration of the wind wheel;
the control module is used for determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
the control module is used for controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
the control module is used for determining the active rotation speed reduction condition according to the following formula:
wherein,the acceleration of the blade shaft of the wind wheel;
the control module is used for calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
The invention provides a method and a system for controlling the rotating speed of a wind wheel of an ultra-high flexible wind power tower, which have the following beneficial effects compared with the prior art:
the invention discloses a method and a system for controlling the rotational speed of a wind wheel of an ultra-high flexible wind power tower, which are used for acquiring the real-time wind speed of the position of a wind power generator and calculating the safe rotational speed of the wind wheel according to the real-time wind speed; collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the first rotating speed and the safe rotating speed; when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not; if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve; if the wind wheel does not have resonance risk, the wind wheel is controlled to enter an active rotation speed reduction mode, and by adopting different wind wheel rotation speed control modes, the invention further realizes accurate and effective control of the rotation speed of the wind wheel of the ultra-high flexible wind power tower, ensures the stable operation of the wind wheel, and further ensures the safety of the fan.
Drawings
FIG. 1 shows a flow diagram of a method for controlling rotational speed of a wind wheel of an ultra-high flexible wind power tower according to an embodiment of the invention;
fig. 2 shows a schematic structural diagram of a wind wheel rotation speed control system of an ultra-high flexible wind power tower according to an embodiment of the invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
The following is a description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings.
As shown in fig. 1, the embodiment of the invention discloses a method for controlling the rotational speed of a wind wheel of an ultra-high flexible wind power tower, which comprises the following steps:
s110: acquiring a real-time wind speed of a position where a wind driven generator is located, and calculating a safe rotating speed of the wind wheel according to the real-time wind speed;
in some embodiments of the present application, the safe rotational speed of the rotor is calculated according to the following formula:
wherein w (k) is the safe rotation speed of the wind wheel, lambda opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
In this embodiment, the real-time wind speed of the position of the wind driven generator can be directly detected according to the wind speed detecting instrument.
The beneficial effects of the technical scheme are as follows: the invention calculates the safe rotation speed of the wind wheel, thereby providing reliable data support for the subsequent judgment of whether the wind wheel is in the safe rotation speed range.
S120: collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
in some embodiments of the present application, when acquiring the first rotational speed of the wind wheel and determining whether the wind wheel is in a safe rotational speed range based on a relationship between the first rotational speed and the safe rotational speed, the method includes:
when the first rotation speed is smaller than or equal to the safety rotation speed, judging that the wind wheel is in a safety rotation speed range;
and when the first rotating speed is larger than the safety rotating speed, judging that the wind wheel is not in the safety rotating speed range.
The beneficial effects of the technical scheme are as follows: according to the invention, whether the wind wheel is in the safe rotating speed range is judged based on the relation between the first rotating speed and the safe rotating speed, so that the accurate control of the wind wheel can be realized.
S130: when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not based on the rotation speed difference value;
in some embodiments of the present application, when determining a rotational speed difference of the wind wheel according to the first rotational speed and the second rotational speed, and determining whether the wind wheel has a resonance risk based on the rotational speed difference, the method includes:
when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value, determining that resonance risk exists;
and when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel, determining that resonance risk exists.
In this embodiment, the preset value and the predetermined value may be set according to actual situations, and are not particularly limited herein.
The beneficial effects of the technical scheme are as follows: according to the invention, whether the wind wheel has resonance risk is judged, so that a foundation can be laid for controlling the rotation speed of the wind wheel, and further accurate control of the wind wheel is ensured, and larger errors are avoided.
S140: if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve;
and if the wind wheel does not have resonance risk, controlling the wind wheel to enter an active rotation speed reduction mode.
In some embodiments of the present application, when controlling the wind wheel to enter the active speed reduction mode, the method includes:
determining a deceleration trend of the wind wheel, and determining an active rotation speed reduction condition based on the deceleration trend of the wind wheel;
determining a blade axis acceleration of the wind turbine;
determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
determining the active derate condition according to:
wherein,the acceleration of the blade shaft of the wind wheel;
calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
In this embodiment, the speed-torque control curve may be trained in advance, and each speed corresponds to a torque value.
The beneficial effects of the technical scheme are as follows: according to whether resonance risks exist or not, different wind wheel rotating speed control modes are adopted, so that accurate and effective control of the rotating speed of the wind wheel of the ultra-high flexible wind power tower is achieved, stable operation of the wind wheel is guaranteed, and further safety of the fan is guaranteed.
In order to further explain the technical idea of the invention, the technical scheme of the invention is described with specific application scenarios.
Correspondingly, as shown in fig. 2, the application further provides a wind wheel rotating speed control system of the ultra-high flexible wind power tower, and the system comprises:
the acquisition module is used for acquiring the real-time wind speed of the position where the wind driven generator is located and calculating the safe rotating speed of the wind wheel according to the real-time wind speed;
the acquisition module is used for acquiring the first rotating speed of the wind wheel and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
the judging module is used for acquiring a second rotating speed of the wind wheel in a preset time when the wind wheel is not in a safe rotating speed range, determining a rotating speed difference value of the wind wheel according to the first rotating speed and the second rotating speed, and judging whether the wind wheel has resonance risk or not based on the rotating speed difference value;
the control module is used for controlling the rotating speed of the wind wheel based on a preset rotating speed-torque control curve if the wind wheel has resonance risk;
and the wind wheel is also used for controlling the wind wheel to enter an active rotation speed reduction mode if the wind wheel does not have resonance risk.
In some embodiments of the application, the obtaining module is specifically configured to:
the acquisition module is used for calculating the safe rotation speed of the wind wheel according to the following formula:
wherein w (k) is the safe rotation speed of the wind wheel, lambda opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
In some embodiments of the application, the acquisition module is specifically configured to:
the acquisition module is used for judging that the wind wheel is in a safe rotating speed range when the first rotating speed is smaller than or equal to the safe rotating speed;
and the acquisition module is used for judging that the wind wheel is not in the safe rotating speed range when the first rotating speed is larger than the safe rotating speed.
In some embodiments of the application, the judging module is specifically configured to:
the judging module is used for determining that resonance risk exists when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value;
the judging module is used for determining that resonance risks exist when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel.
In some embodiments of the application, the control module is specifically configured to:
the control module is used for determining the deceleration trend of the wind wheel and determining the active rotation speed reduction condition based on the deceleration trend of the wind wheel;
the control module is used for determining the blade shaft acceleration of the wind wheel;
the control module is used for determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
the control module is used for controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
the control module is used for determining the active rotation speed reduction condition according to the following formula:
wherein,the acceleration of the blade shaft of the wind wheel;
the control module is used for calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
In summary, the embodiment of the invention calculates the safe rotating speed of the wind wheel according to the real-time wind speed by acquiring the real-time wind speed of the position of the wind driven generator; collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the first rotating speed and the safe rotating speed; when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not; if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve; if the wind wheel does not have resonance risk, the wind wheel is controlled to enter an active rotation speed reduction mode, and by adopting different wind wheel rotation speed control modes, the invention further realizes accurate and effective control of the rotation speed of the wind wheel of the ultra-high flexible wind power tower, ensures the stable operation of the wind wheel, and further ensures the safety of the fan.
In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
Although the invention has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the entire description of these combinations is not made in the present specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Those of ordinary skill in the art will appreciate that: the above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The method for controlling the rotating speed of the wind wheel of the ultra-high flexible wind power tower is characterized by comprising the following steps:
acquiring a real-time wind speed of a position where a wind driven generator is located, and calculating a safe rotating speed of the wind wheel according to the real-time wind speed;
collecting a first rotating speed of the wind wheel, and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
when the wind wheel is not in the safe rotation speed range, acquiring a second rotation speed of the wind wheel in a preset time, determining a rotation speed difference value of the wind wheel according to the first rotation speed and the second rotation speed, and judging whether the wind wheel has resonance risk or not based on the rotation speed difference value;
if the wind wheel has resonance risk, controlling the rotation speed of the wind wheel based on a preset rotation speed-torque control curve;
and if the wind wheel does not have resonance risk, controlling the wind wheel to enter an active rotation speed reduction mode.
2. The ultra-high flexible wind power tower wind wheel rotating speed control method according to claim 1, wherein,
calculating the safe rotation speed of the wind wheel according to the following formula:
wherein w (k) is the safe rotation speed of the wind wheel, lambda opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
3. The ultra-high flexible wind power tower wind wheel rotating speed control method according to claim 1, wherein when collecting a first rotating speed of the wind wheel and judging whether the wind wheel is in a safe rotating speed range based on a relation between the first rotating speed and the safe rotating speed, comprising:
when the first rotation speed is smaller than or equal to the safety rotation speed, judging that the wind wheel is in a safety rotation speed range;
and when the first rotating speed is larger than the safety rotating speed, judging that the wind wheel is not in the safety rotating speed range.
4. The ultra-high flexible wind power tower wind wheel rotating speed control method according to claim 1, wherein when determining a rotating speed difference value of the wind wheel according to the first rotating speed and the second rotating speed and judging whether the wind wheel has resonance risk based on the rotating speed difference value, comprising:
when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value, determining that resonance risk exists;
and when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel, determining that resonance risk exists.
5. The ultra-high flexible wind power tower wind wheel rotating speed control method according to claim 1, wherein when the wind wheel is controlled to enter an active rotating speed reducing mode, the method comprises the following steps:
determining a deceleration trend of the wind wheel, and determining an active rotation speed reduction condition based on the deceleration trend of the wind wheel;
determining a blade axis acceleration of the wind turbine;
determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
determining the active derate condition according to:
wherein,the acceleration of the blade shaft of the wind wheel;
calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
6. An ultra-high flexible wind power tower wind wheel rotating speed control system, characterized in that the system comprises:
the acquisition module is used for acquiring the real-time wind speed of the position where the wind driven generator is located and calculating the safe rotating speed of the wind wheel according to the real-time wind speed;
the acquisition module is used for acquiring the first rotating speed of the wind wheel and judging whether the wind wheel is in a safe rotating speed range or not based on the relation between the first rotating speed and the safe rotating speed;
the judging module is used for acquiring a second rotating speed of the wind wheel in a preset time when the wind wheel is not in a safe rotating speed range, determining a rotating speed difference value of the wind wheel according to the first rotating speed and the second rotating speed, and judging whether the wind wheel has resonance risk or not based on the rotating speed difference value;
the control module is used for controlling the rotating speed of the wind wheel based on a preset rotating speed-torque control curve if the wind wheel has resonance risk;
and the wind wheel is also used for controlling the wind wheel to enter an active rotation speed reduction mode if the wind wheel does not have resonance risk.
7. The ultra-high flexible wind power tower wind wheel rotating speed control system according to claim 6, wherein the obtaining module is specifically configured to:
the acquisition module is used for calculating the safe rotation speed of the wind wheel according to the following formula:
wherein,w (k) is the safe rotation speed of the wind wheel, lambda opt Is the optimal value of the rotating speed of the blade tip of the wind wheel, n g The speed ratio of the gearbox of the wind wheel is represented by R, the radius of the wind wheel is represented by R (k), and the real-time wind speed of the position of the wind driven generator is represented by R (k).
8. The ultra-high flexible wind power tower wind wheel rotating speed control system according to claim 6, wherein the acquisition module is specifically configured to:
the acquisition module is used for judging that the wind wheel is in a safe rotating speed range when the first rotating speed is smaller than or equal to the safe rotating speed;
and the acquisition module is used for judging that the wind wheel is not in the safe rotating speed range when the first rotating speed is larger than the safe rotating speed.
9. The ultra-high flexible wind power tower wind wheel rotating speed control system according to claim 6, wherein the judging module is specifically configured to:
the judging module is used for determining that resonance risk exists when the rotating speed difference value is larger than a preset value or the acceleration of the wind wheel is larger than a preset value;
the judging module is used for determining that resonance risks exist when obvious beat vibration or divergence phenomenon exists in the acceleration of the wind wheel.
10. The ultra-high flexible wind power tower wind wheel rotating speed control system according to claim 6, wherein the control module is specifically configured to:
the control module is used for determining the deceleration trend of the wind wheel and determining the active rotation speed reduction condition based on the deceleration trend of the wind wheel;
the control module is used for determining the blade shaft acceleration of the wind wheel;
the control module is used for determining the control torque of the wind wheel according to the second rotating speed of the wind wheel, the blade shaft acceleration of the wind wheel and the active speed reduction condition;
the control module is used for controlling the wind wheel to enter an active rotation speed reduction mode based on the control torque;
the control module is used for determining the active rotation speed reduction condition according to the following formula:
wherein,the acceleration of the blade shaft of the wind wheel;
the control module is used for calculating the control torque of the wind wheel according to the following formula:
wherein M is the control torque of the wind wheel, and n is the second rotating speed of the wind wheel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311087035.9A CN117249040A (en) | 2023-08-25 | 2023-08-25 | Wind wheel rotating speed control method and system for ultra-high flexible wind power tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311087035.9A CN117249040A (en) | 2023-08-25 | 2023-08-25 | Wind wheel rotating speed control method and system for ultra-high flexible wind power tower |
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| CN117249040A true CN117249040A (en) | 2023-12-19 |
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| CN202311087035.9A Pending CN117249040A (en) | 2023-08-25 | 2023-08-25 | Wind wheel rotating speed control method and system for ultra-high flexible wind power tower |
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