CN111396267B - Simulation method based on wind power tower shaking inclination angle simulation device - Google Patents
Simulation method based on wind power tower shaking inclination angle simulation device Download PDFInfo
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- CN111396267B CN111396267B CN202010147586.XA CN202010147586A CN111396267B CN 111396267 B CN111396267 B CN 111396267B CN 202010147586 A CN202010147586 A CN 202010147586A CN 111396267 B CN111396267 B CN 111396267B
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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 discloses a simulation method based on a wind power tower shaking inclination angle simulation device. The invention has the following beneficial effects: the swing inclination angle simulation device can set the rotation speed of the direct drive motor, control the swing period and amplitude of the tool support and realize the swing inclination angle simulation of different wind power towers; the method can also be used for performance evaluation of the wind power tower shaking monitoring equipment and safety evaluation of the flexible high tower, and ensures the operation safety of the wind power tower.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a simulation method based on a wind power tower shaking inclination angle simulation device, which can simulate different wind power tower shaking, study the influence of the wind power tower shaking on the operation performance of equipment and evaluate the safety performance of a flexible wind power tower.
Background
With the gradual shift of the center of gravity of wind power development in China to low wind speed areas in the south, in order to obtain better wind resources, the development of wind generating sets with higher towers gradually becomes an industrial hotspot, and the safety problem of flexible high tower sets also becomes a key point of industrial attention. Compare traditional rigidity pylon, the pylon height of flexible high tower is higher, and it is bigger to rock the range, rocks the law more complicated. For a traditional rigid tower, the operation safety protection of the tower can be realized by monitoring the natural frequency and the acceleration amplitude of the tower shaking. For the flexible high tower, the natural frequency and the acceleration amplitude of the tower shaking are not enough to fully reflect the safe state of the unit, and the tower shaking displacement needs to be monitored in order to protect the operation safety of the flexible high tower unit. However, the existing wind turbine generator tower shaking monitoring means cannot accurately measure the tower shaking inclination angle, and effective monitoring of the tower shaking displacement is difficult to realize. Therefore, the shaking inclination angle of the wind power tower is simulated through the technical means, and the method has important significance for researching the shaking rule of the tower, improving the design level of the wind power tower and the monitoring capability of the shaking of the tower and ensuring the safe operation of the wind power tower.
Disclosure of Invention
In order to overcome the defects that the tower shaking inclination angle cannot be accurately measured and effective monitoring is difficult to realize in the prior art, the invention provides the simulation method based on the wind power tower shaking inclination angle simulation device, which can simulate different wind power tower shaking, study the influence of the wind power tower shaking on the equipment operation performance and evaluate the safety performance of the flexible wind power tower.
In order to achieve the purpose, the invention adopts the following technical scheme:
a simulation method based on a wind power tower shaking inclination angle simulation device comprises a base, a tool support and a direct drive motor which are arranged on the base, an acceleration sensor, an encoder, a controller and a computer which are arranged on the tool support; the encoder is respectively electrically connected with the direct drive motor and the controller, the computer and the acceleration sensor are electrically connected with the controller, and the direct drive motor is connected with the tool bracket; the method comprises the following steps:
(1-1) installing an acceleration sensor at the top end of the wind power tower, measuring to obtain the shaking acceleration of the wind power tower, and calculating to obtain the natural frequency of the wind power tower, wherein the shaking acceleration of the wind power tower
L1 denotes the height of the wind tower, ω 1 denotes the angular velocity of the wind tower oscillation, t denotes time,
representing an angular acceleration of the wind tower;
(1-2) driving the tool support to shake through the direct drive motor, measuring to obtain the shaking acceleration of the tool support, enabling the angular speed change of the tool support to be consistent with the angular speed of the wind power tower, and simulating the shaking of the wind power tower;
and (1-3) measuring the rotation angle of the direct drive motor through an encoder to obtain a simulation result of the shaking inclination angle of the wind power tower.
According to the method, firstly, the actual shaking acceleration and natural frequency of the wind power tower are obtained through measurement and calculation, then the tool support is driven to shake through the direct drive motor, the shaking acceleration of the tool support is obtained through measurement of the acceleration sensor, the angular speed change of the tool support is consistent with the angular speed of the wind power tower, the shaking of the wind power tower is simulated, and finally the rotation angle of the direct drive motor is measured through the encoder, so that the simulation result of the shaking inclination angle of the wind power tower can be obtained.
Preferably, the specific steps of step (1-2) are as follows:
(2-1) programming the controller by the computer, setting the rotation speed of the direct drive motor, converting an output control signal by an encoder, inputting the converted control signal into the direct drive motor, controlling the direct drive motor to rotate in a reciprocating manner at the set rotation speed, and driving the tool support to shake by a rotor of the direct drive motor;
(2-2) measuring the acceleration and the natural frequency of the tool support through an acceleration sensor arranged at the top end of the tool support, wherein the acceleration of the tool support in shaking is obtained
L2 represents the height of the tool holder, ω 2 represents the angular velocity of the tool holder shaking,
representing the angular acceleration of the tool holder;
(2-3) changing the set rotating speed of the direct drive motor, enabling the angular speed change of the shaking of the tool support to be consistent with that of the wind power tower, and simulating the shaking of the wind power tower; according to the acceleration relational expression, if the angular speed change of the tool support shaking is consistent with that of the wind power tower, the natural frequency of the tool support shaking should be equal to that of the wind power tower shaking, and meanwhile, the acceleration ratio of the tool support and the wind power tower should be equal to that of the toolHeight ratio of the support to the wind tower, i.e.
Preferably, the tool support comprises a first support frame, a mounting plate and a second support frame fixedly connected with the mounting plate; the second support frame is sleeved on the first support frame.
Preferably, the first support frame and the second support frame are both provided with a plurality of mounting holes; the mounting hole on the first support frame is matched with the mounting hole on the second support frame; the height of the tool support can be adjusted through the mounting holes, and simulation of wind power towers with different heights is achieved.
Preferably, the first support frame and the second support frame are both tubular structures.
Preferably, the device also comprises an inclination angle sensor arranged on the tool bracket, wherein the inclination angle sensor is electrically connected with the controller; also comprises the following steps:
(3-1) when the tool support shakes, measuring by using a tilt angle sensor to obtain a shaking tilt angle of the tool support;
(3-2) comparing the measured inclination angle result with a simulation result of the shaking inclination angle of the wind power tower obtained by the encoder;
(3-3) testing and calibrating the measurement precision of the inclination angle sensor by taking the simulation result of the shaking inclination angle of the wind power tower obtained by the encoder as reference; the precision of the tilt sensor can be tested and calibrated.
Therefore, the invention has the following beneficial effects: (1) the invention provides a simple, convenient and effective wind power tower shaking inclination angle simulation method, which is low in cost; (2) the rotating speed of the direct drive motor can be set, the shaking period and amplitude of the tool support are controlled, and the shaking inclination angle simulation of different wind power towers is realized; (3) the method can also be used for performance evaluation of the wind power tower shaking monitoring equipment and safety evaluation of the flexible high tower, and ensures the operation safety of the wind power tower.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a block diagram of a wind power tower sway dip angle simulation apparatus according to the present invention;
FIG. 3 is a schematic view of the wind tower sway tilt angle of the present invention;
fig. 4 is a schematic structural view of the tool holder of the present invention.
In the figure: the device comprises a base 1, a tool support 2, a direct drive motor 3, an acceleration sensor 4, an encoder 5, a controller 6, a computer 7, a bolt 8, an installation channel 11, a first support frame 21, an installation plate 22, a second support frame 23 and an installation hole 24.
Detailed Description
The invention is further described in the following detailed description with reference to the drawings in which:
the embodiment shown in fig. 1 is a simulation method based on a wind power tower shaking inclination angle simulation device, and as shown in fig. 2, the wind power tower shaking inclination angle simulation device comprises a base 1, a tool support 2 and a direct drive motor 3 which are arranged on the base, an acceleration sensor 4 which is arranged on the tool support, an inclination angle sensor which is arranged on the tool support, an encoder 5, a controller 6 and a computer 7; the encoder is respectively electrically connected with the direct drive motor and the controller, the computer, the inclination angle sensor and the acceleration sensor are electrically connected with the controller, and the direct drive motor is connected with the tool support in a bolt or welding mode; as shown in fig. 4, the tooling support comprises a first support frame 21, a mounting plate 22 and a second support frame 23 fixedly connected with the mounting plate; the second support frame is sleeved on the first support frame; the first support frame and the second support frame are respectively provided with a plurality of mounting holes 24; the mounting plate is provided with a threaded mounting hole which can be used as an equipment mounting platform, the acceleration sensor is mounted on the mounting plate through a threaded mounting hole, and the mounting hole on the first support frame is matched with the mounting hole on the second support frame; the first support frame and the second support frame are both tubular structures; the controller is an industrial PLC controller, has a programmable function and can control the direct drive motor to drive the tool bracket to simulate the wind power towers with different frequencies and amplitudes to shake; the device has the expansion capability of various data communication and acquisition modules, can read the rotation angle of the motor fed back by the encoder, can also be connected with a sensor, and can obtain the state data of the tool support and the upper end plane fixing equipment thereof through measurement.
In the embodiment, the weight of a 2.5MW wind turbine generator cabin is 179t, the total weight of a wind power tower is 231t, the height of the wind power tower is 100m, the total length of the cabin is 15.7m, and the gravity center position is 1.3m in front of the axis of the tower; according to the weight and size parameters of the wind turbine generator, the mounting plate is 160mm long, the height between the mounting plane of the mounting plate and the axis of the rotor of the direct drive motor is 1020mm, the weight of the first support frame is 2.2kg, the total weight of the mounting plate after the mounting plate is provided with accessories such as an acceleration sensor, a counterweight mass block and the like is 1.7kg, and the gravity center position is about 13mm in front of the axis of the first support frame; the weight and size proportion of the tool support are the same as those of the wind turbine; the direct drive motor is fixed on a mounting channel 11 of the base through a bolt 8; the base is provided with a fixed interface and can be arranged on the ground; when the ground does not have the installation condition, the base can also rely on self weight to keep the stability of the simulator.
The simulation method based on the wind power tower shaking inclination angle simulation device comprises the following steps:
step 100, installing an acceleration sensor at the top end of the wind power tower, measuring to obtain the shaking acceleration of the wind power tower, and calculating to obtain the natural frequency of the wind power tower, wherein the shaking acceleration of the wind power tower
L1 denotes the height of the wind tower, ω 1 denotes the angular velocity of the wind tower oscillation, t denotes time,
representing an angular acceleration of the wind tower;
200, driving the tool support to shake through the direct drive motor, measuring and obtaining the acceleration of the tool support shaking, enabling the angular speed change of the tool support to be consistent with the angular speed of the wind power tower, and simulating the shaking of the wind power tower;
step 201, programming a controller by a computer, setting the rotation speed of a direct drive motor, converting an output control signal by an encoder, inputting the converted control signal into the direct drive motor, controlling the direct drive motor to rotate in a reciprocating manner at the set rotation speed, and driving a tool support to shake by a rotor of the direct drive motor;
step 202, measuring and obtaining the shaking acceleration and the natural frequency of the tool support through an acceleration sensor arranged at the top end of the tool support, wherein the shaking acceleration of the tool support is obtained
L2 represents the height of the tool holder, ω 2 represents the angular velocity of the tool holder shaking,
representing the angular acceleration of the tool holder;
step 203, changing the set rotation speed of the direct drive motor, enabling the angular speed change of the shaking of the tool support to be consistent with that of the wind power tower, and simulating the shaking of the wind power tower; according to the acceleration relational expression, if the angular speed change of the tool support shaking is consistent with that of the wind power tower, the natural frequency of the tool support shaking is equal to that of the wind power tower shaking, and meanwhile, the acceleration ratio of the tool support to the wind power tower is equal to the height ratio of the tool support to the wind power tower, namely
Step 300, measuring a rotation angle of the direct drive motor through an encoder to obtain a simulation result of the wind power tower shaking inclination angle, such as an angle beta in fig. 3, wherein A represents a wind power tower axis in a complete static state, B represents an axis deformation curve when the wind power tower shakes, Delta S represents the wind power tower shaking displacement, and beta represents the wind power tower shaking inclination angle;
step 400, when the tool support shakes, measuring by using a tilt angle sensor to obtain a tilt angle of the tool support;
500, comparing the measured inclination angle result with a simulation result of the shaking inclination angle of the wind power tower obtained by an encoder;
and step 600, testing and calibrating the measurement precision of the inclination angle sensor by taking the simulation result of the wind power tower shaking inclination angle obtained by the encoder as reference.
It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (6)
1. A simulation method based on a wind power tower shaking inclination angle simulation device is characterized in that the wind power tower shaking inclination angle simulation device comprises a base (1), a tool support (2) and a direct drive motor (3) which are arranged on the base, an acceleration sensor (4) arranged on the tool support, an encoder (5), a controller (6) and a computer (7); the encoder is respectively electrically connected with the direct drive motor and the controller, the computer and the acceleration sensor are electrically connected with the controller, and the direct drive motor is connected with the tool bracket; the method comprises the following steps:
(1-1) installing an acceleration sensor at the top end of the wind power tower, measuring to obtain the shaking acceleration of the wind power tower, and calculating to obtain the natural frequency of the wind power tower, wherein the shaking acceleration of the wind power tower
L1 denotes the height of the wind tower, ω 1 denotes the angular velocity of the wind tower oscillation, t denotes time,
representing an angular acceleration of the wind tower;
(1-2) driving the tool support to shake through the direct drive motor, measuring to obtain the shaking acceleration of the tool support, enabling the angular speed change of the tool support to be consistent with the angular speed of the wind power tower, and simulating the shaking of the wind power tower;
and (1-3) measuring the rotation angle of the direct drive motor through an encoder to obtain a simulation result of the shaking inclination angle of the wind power tower.
2. The simulation method based on the wind power tower shaking inclination angle simulation device according to claim 1, wherein the specific steps of the step (1-2) are as follows:
(2-1) programming the controller by the computer, setting the rotation speed of the direct drive motor, converting an output control signal by an encoder, inputting the converted control signal into the direct drive motor, controlling the direct drive motor to rotate in a reciprocating manner at the set rotation speed, and driving the tool support to shake by a rotor of the direct drive motor;
(2-2) measuring the acceleration and the natural frequency of the tool support through an acceleration sensor arranged at the top end of the tool support, wherein the acceleration of the tool support in shaking is obtained
L2 represents the height of the tool holder, ω 2 represents the angular velocity of the tool holder shaking,
representing the angular acceleration of the tool holder;
(2-3) changing the set rotating speed of the direct drive motor, enabling the angular speed change of the shaking of the tool support to be consistent with that of the wind power tower, and simulating the shaking of the wind power tower; according to the acceleration relational expression, if the angular speed change of the tool support shaking is consistent with that of the wind power tower, the natural frequency of the tool support shaking is equal to that of the wind power tower shaking, and meanwhile, the acceleration ratio of the tool support to the wind power tower is equal to the height ratio of the tool support to the wind power tower, namely
3. The simulation method based on the wind power tower shaking inclination angle simulation device according to claim 1, wherein the tool support comprises a first support frame (21), a mounting plate (22) and a second support frame (23) fixedly connected with the mounting plate; the second support frame is sleeved on the first support frame.
4. The simulation method based on the wind power tower shaking inclination angle simulation device according to claim 3, wherein a plurality of mounting holes (24) are formed in each of the first support frame and the second support frame; the mounting hole on the first support frame is matched with the mounting hole on the second support frame.
5. The simulation method based on the wind power tower shaking inclination angle simulation device according to claim 3 or 4, wherein the first support frame and the second support frame are both tubular structures.
6. The simulation method based on the wind power tower shaking inclination angle simulation device according to claim 1, 2, 3 or 4, further comprising an inclination angle sensor mounted on the tool support, wherein the inclination angle sensor is electrically connected with the controller; also comprises the following steps:
(3-1) when the tool support shakes, measuring by using a tilt angle sensor to obtain a shaking tilt angle of the tool support;
(3-2) comparing the measured inclination angle result with a simulation result of the shaking inclination angle of the wind power tower obtained by the encoder;
and (3-3) testing and calibrating the measurement precision of the inclination angle sensor by taking the simulation result of the shaking inclination angle of the wind power tower obtained by the encoder as reference.
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| CN108457797B (en) * | 2018-02-01 | 2020-12-11 | 上海电气风电集团股份有限公司 | Control method for inhibiting lateral vibration of tower of wind generating set |
| CN109596175B (en) * | 2018-12-28 | 2021-05-07 | 深圳前海慧联科技发展有限公司 | Wind power tower cylinder slope and rock on-line monitoring system |
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