CN113623146B - On-line monitoring method for fatigue state of gearbox of wind generating set - Google Patents
On-line monitoring method for fatigue state of gearbox of wind generating set Download PDFInfo
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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
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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Abstract
The invention discloses an online monitoring method for fatigue state of a gear box of a wind generating set, which comprises the following steps: firstly, determining a design fatigue curve of a gear box of a wind generating set according to operation environment parameters of the wind generating set; then monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set; then, by outputting electric power, generator torque and generator rotating speed and combining the gear box speed ratio and mechanical and electrical loss parameters, the torque and the rotating speed of the input end of the gear box are calculated; then, based on the torque and the rotating speed of the input end of the gear box, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method; and finally, comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gear box of the wind generating set, wherein if the gear box is in the fatigue state, the wind generating set can adopt a preset capacity reduction or rotating speed scheme to form closed loop monitoring of gear box fatigue monitoring and control intervention.
Description
Technical Field
The invention relates to the technical field of monitoring or control of wind driven generators, in particular to an online monitoring method for fatigue state of a gearbox of a wind driven generator set.
Background
The wind generating set is a system for converting wind energy into mechanical energy from wind through blades and converting the mechanical energy into electric energy from a generator through transmission of a gear box. The blades, the gear box and the generator are three parts of the wind turbine generator set, and the design states of the three parts determine the whole performance of the wind turbine generator set. The generating capacity of the unit depends on the gear box, so that the design research of the gear box is very important.
At present, certain achievements are also achieved for monitoring the gear box at home and abroad, such as a Marlin state monitoring system developed in Sweden and German Prussian can better realize the functions of monitoring and analyzing the gear box faults. Some experimental work has been done by various manufacturers of big fans in China, for example, DASP (Data Acquisition and Signal Pocessing) vibration systems developed by Beijing eastern corporation have been able to better monitor and analyze faults of gearboxes. However, there is currently no technology for monitoring the fatigue state of a gearbox when a wind turbine generator system is running.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an on-line monitoring method for the fatigue state of a gearbox of a wind generating set, which can monitor the fatigue state of the gearbox when the wind generating set operates.
In a first aspect, a method for monitoring equivalent fatigue load of a gearbox of a wind generating set is provided, including:
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
and calculating the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method based on the torque and the rotating speed of the input end of the gear box.
With reference to the first aspect, in a first implementation manner of the first aspect, calculating the torque of the gearbox input includes:
according to the output electric power, the generator torque and the mechanical electric loss parameters, calculating the electric loss and the mechanical loss of the wind generating set;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the electrical loss and the mechanical loss are calculated by using a linear interpolation method according to the output electrical power, the generator torque and the mechanical electrical loss parameter.
With reference to the first aspect, the first or the second implementation manner of the first aspect, in a third implementation manner of the first aspect, the rotation speed of the input end of the gearbox is calculated according to the rotation speed of the generator and the speed ratio of the gearbox.
In a second aspect, an online monitoring method for fatigue state of a gearbox of a wind generating set is provided, including:
determining a design fatigue curve of a gearbox of the wind generating set according to the operation environment parameters of the wind generating set;
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
based on the torque and the rotating speed of the input end of the gear box, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method;
and comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set.
With reference to the second aspect, in a first implementation manner of the second aspect, the design fatigue curve is determined by adopting a simulation method according to an operation environment parameter of the wind generating set.
With reference to the second aspect, in a second implementation manner of the second aspect, calculating the torque of the input end of the gearbox includes:
according to the output electric power, the generator torque and the mechanical electric loss parameters, calculating the electric loss and the mechanical loss of the wind generating set;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
With reference to the second aspect, in a third implementation manner of the second aspect, the electrical loss and the mechanical loss are calculated according to the output electrical power, the generator torque and the mechanical electrical loss parameter by using a linear interpolation method.
With reference to the second aspect, in a fourth implementation manner of the second aspect, the rotation speed of the input end of the gearbox is calculated according to the rotation speed of the generator and the speed ratio of the gearbox.
In a third aspect, a method for controlling a wind generating set is provided, including:
determining a design fatigue curve of a gearbox of the wind generating set according to the operation environment parameters of the wind generating set;
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
based on the torque and the rotating speed of the input end of the gear box, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method;
comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set;
and according to the fatigue state of the gear box of the wind generating set, adopting a corresponding control strategy to control the wind generating set.
With reference to the third aspect, in a first implementation manner of the third aspect, the design fatigue curve is determined by adopting a simulation method according to an operation environment parameter of the wind generating set.
With reference to the first implementation manner of the third aspect, in a second implementation manner of the third aspect, calculating the torque of the input end of the gearbox includes:
according to the output electric power, the generator torque and the mechanical electric loss parameters, calculating the electric loss and the mechanical loss of the wind generating set;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
With reference to the third aspect, in a third possible implementation manner of the third aspect, the electrical loss and the mechanical loss are calculated by using a linear interpolation method according to the output electrical power, the generator torque and the mechanical electrical loss parameter.
With reference to the third aspect, any one of the first to third possible implementation manners of the third aspect, in four possible implementation manners of the third aspect, the rotation speed of the input end of the gearbox is calculated according to the rotation speed of the generator and the speed ratio of the gearbox.
The beneficial effects are that: the method for monitoring the fatigue state of the gearbox of the wind generating set on line is adopted, the monitoring data of the torque and the rotating speed of the high-speed shaft of the wind generating set are combined with the speed ratio and the mechanical and electrical loss of the gearbox to be converted into the torque and the rotating speed of the input end of the gearbox, then the LDD calculation method is adopted to equivalent the equivalent fatigue load of the gearbox, the on-line monitoring of the fatigue state of the gearbox is realized, and therefore, the control strategy intervention is started when the fatigue of the operation of the gearbox exceeds the design condition, and the closed loop monitoring of the fatigue monitoring and the control intervention of the gearbox is formed.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a flowchart of a method for monitoring equivalent fatigue load of a gearbox of a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for online monitoring fatigue status of a gearbox of a wind turbine generator system according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for controlling a wind turbine generator system according to an embodiment of the present invention;
FIG. 4 is a graph comparing the torque calculation result and the simulation result at the input end of the gearbox, wherein Stationary Mx is the simulation result, and Gear input torque is the calculation result;
fig. 5 is a graph comparing the calculation result and the simulation result of the rotation speed at the input end of the gear box, wherein Rotor speed is the simulation result, and Gear input torque is the calculation result.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
In a first embodiment, as shown in fig. 1, a flowchart of a method for monitoring equivalent fatigue load of a gearbox of a wind turbine generator system, the monitoring method includes:
step 1-1, monitoring output electric power, generator torque and generator rotating speed of a wind generating set;
step 1-2, calculating the torque and the rotating speed of the input end of the gear box by outputting electric power, the torque and the rotating speed of the generator and combining the gear box speed ratio and the mechanical and electrical loss parameters;
and step 1-3, calculating the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method based on the torque and the rotating speed of the input end of the gear box. Specifically:
firstly, the output electric power, the generator torque and the generator rotating speed of a generator in the wind generating set can be monitored through a monitoring system of the wind generating set; then, by outputting electric power, generator torque and generator rotational speed, in combination with the gearbox speed ratio and the mechanical-electrical loss parameters, the torque and rotational speed at the gearbox input can be calculated. The mechanical and electrical loss parameters include a gearbox loss list and a generator loss list, both of which can be obtained directly from the manufacturer.
The electric loss of the wind generating set under the output electric power can be determined by using the generator loss list, the mechanical loss of the wind generating set under the generator torque can be determined by using the mechanical loss list, the torque of the input end of the gear box can be reversely deduced by combining the gear box speed ratio, the electric loss, the mechanical loss and the generator torque, and the rotating speed of the input end of the gear box can be reversely deduced by the rotating speed of the generator and the gear box speed ratio.
The torque at the gearbox input can be calculated using the following equation:
wherein,,
is the i-th data point of the generator torque, +.>
Is the ith data point of electrical loss, +.>
Is the ith data point of mechanical loss.
The result obtained through experimental simulation is shown in fig. 4, and as can be seen from fig. 4, the torque at the input end of the gear box calculated by adopting the method basically accords with the actual situation.
Finally, according to the rotation speed and torque of the input end of the gear box, the equivalent fatigue load of the gear box can be calculated by an LDD fatigue calculation method, and the calculation formula is as follows:
wherein,,
is the ith data point of torque at the gearbox input, and (2)>
Is the ith data point of the rotating speed of the input end of the gear box, dt is the time interval of data acquisition, and m is the test index of different positions of the gear box, which is generally 10/3.
The calculated equivalent fatigue load can be used for evaluating the fatigue state of the gear box, and a foundation is provided for realizing the on-line monitoring of the fatigue state of the gear box.
In the present embodiment, it is preferable that the electrical loss and the mechanical loss are calculated by a linear interpolation method based on the output electrical power, the generator torque, and the mechanical electrical loss parameter. The electrical loss and the mechanical loss can be calculated more accurately by adopting the linear interpolation method, and the error of equivalent fatigue load calculation is reduced.
In this embodiment, preferably, the rotational speed of the input end of the gearbox is calculated according to the rotational speed of the generator and the gearbox speed ratio.
The rotational speed at the gearbox input may be calculated using the following equation:
wherein,,
is the i-th data point of the generator speed and n is the gearbox speed ratio.
The result obtained through experimental simulation is shown in fig. 5, and it can be seen from fig. 5 that the rotational speed of the input end of the gear box calculated by adopting the method basically accords with the actual situation.
In a second embodiment, as shown in fig. 2, a flowchart of a method for online monitoring fatigue state of a gearbox of a wind turbine generator system, the monitoring method includes:
step 2-1, determining a design fatigue curve of a gear box of the wind generating set according to the operation environment parameters of the wind generating set;
step 2-2, monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
step 2-3, calculating the torque and the rotating speed of the input end of the gear box by outputting electric power, the torque and the rotating speed of the generator and combining the gear box speed ratio and the mechanical and electrical loss parameters;
step 2-4, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method based on the torque and the rotating speed of the input end of the gear box;
and 2-5, comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set. Specifically:
firstly, the operation environment parameters of the environment where the wind generating set is arranged can be collected according to the environment monitoring system of the place where the wind generating set is arranged, and the design fatigue curve of the gearbox of the wind generating set can be determined according to the operation environment parameters.
Then, the equivalent fatigue load of the wind turbine gearbox is monitored. In this embodiment, the method for monitoring the equivalent fatigue load is the same as the method for monitoring the equivalent fatigue load of the gearbox of the wind turbine generator system, and specific technical principles and steps are not repeated here.
And finally, comparing the calculated equivalent fatigue load with the designed fatigue curve, and if the equivalent fatigue load exceeds the designed fatigue curve, putting the gearbox in a fatigue state. Therefore, the fatigue state of the gearbox is monitored on line, and a foundation is provided for the fatigue control intervention of the gearbox.
In this embodiment, preferably, the design fatigue curve is determined by adopting a simulation method according to the operation environment parameters of the wind generating set. Specifically, the existing simulation software, such as bladed software, can be adopted to perform simulation, and the running environment parameters of the wind generating set installation site, such as site wind speed, turbulence, air density and other data, are input into the simulation software to perform simulation calculation, so that the design fatigue curve of the wind generating set is obtained.
In this embodiment, preferably, calculating the torque at the input of the gearbox comprises:
according to the output electric power, the generator torque and the mechanical electric loss parameters, calculating the electric loss and the mechanical loss of the wind generating set;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
The mechanical and electrical loss parameters include a gearbox loss list and a generator loss list, both of which can be obtained directly from the manufacturer. The electric loss of the wind generating set under the output electric power can be determined by using the generator loss list, the mechanical loss of the wind generating set under the generator torque can be determined by using the mechanical loss list, the torque of the input end of the gear box can be reversely deduced by combining the gear box speed ratio, the electric loss, the mechanical loss and the generator torque, and the rotating speed of the input end of the gear box can be reversely deduced by the rotating speed of the generator and the gear box speed ratio.
In the present embodiment, it is preferable that the electrical loss and the mechanical loss are calculated by a linear interpolation method based on the output electrical power, the generator torque, and the mechanical electrical loss parameter.
In a third embodiment, a flowchart of a control method of a wind turbine generator set shown in fig. 3, the control method includes:
step 3-1, determining a design fatigue curve of a gear box of the wind generating set according to the operation environment parameters of the wind generating set;
step 3-2, monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
step 3-3, calculating the torque and the rotating speed of the input end of the gear box by outputting electric power, the torque and the rotating speed of the generator and combining the gear box speed ratio and the mechanical and electrical loss parameters;
step 3-4, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method based on the torque and the rotating speed of the input end of the gear box;
step 3-5, comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set;
and 3-6, controlling the wind generating set by adopting a corresponding control strategy according to the fatigue state of the gear box of the wind generating set. Specifically:
firstly, a design fatigue curve of a gearbox of a wind turbine generator system can be determined according to operation environment parameters of the wind turbine generator system, in this embodiment, a determination method of the design fatigue curve is the same as the determination method of the design fatigue curve in the online monitoring method of the fatigue state of the gearbox of the wind turbine generator system, and specific technical principles are not repeated herein.
Then, the equivalent fatigue load of the wind turbine gearbox is monitored. In this embodiment, the method for monitoring the equivalent fatigue load is the same as the method for monitoring the equivalent fatigue load of the gearbox of the wind turbine generator system, and specific technical principles and steps are not repeated here.
And then comparing the equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set.
And finally, controlling the wind generating set by adopting a corresponding control strategy according to the fatigue state of the gear box of the wind generating set.
If the gear box is not in a fatigue state, the wind generating set can keep a normal running state;
if the gearbox is in a fatigue state, the wind generating set can adopt a preset capacity reduction or rotating speed reduction scheme, so that the fatigue of the gearbox is reduced. And when the fatigue of the operation of the gearbox exceeds the design condition, starting a control strategy to intervene, and forming closed-loop monitoring of the fatigue monitoring and the control intervention of the gearbox.
In this embodiment, preferably, the design fatigue curve is determined by adopting a simulation method according to the operation environment parameters of the wind generating set. The existing simulation software can be adopted to carry out simulation, such as bladed software, and the running environment parameters of the wind generating set installation site, such as site wind speed, turbulence, air density and other data, are input into the simulation software to carry out simulation calculation, so that the design fatigue curve of the wind generating set is obtained.
In this embodiment, preferably, calculating the torque at the input of the gearbox comprises:
according to the output electric power, the generator torque and the mechanical electric loss parameters, calculating the electric loss and the mechanical loss of the wind generating set;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
The mechanical and electrical loss parameters include a gearbox loss list and a generator loss list, both of which can be obtained directly from the manufacturer. The electric loss of the wind generating set under the output electric power can be determined by using the generator loss list, the mechanical loss of the wind generating set under the generator torque can be determined by using the mechanical loss list, the torque of the input end of the gear box can be reversely deduced by combining the gear box speed ratio, the electric loss, the mechanical loss and the generator torque, and the rotating speed of the input end of the gear box can be reversely deduced by the rotating speed of the generator and the gear box speed ratio.
In the present embodiment, it is preferable that the electrical loss and the mechanical loss are calculated by a linear interpolation method based on the output electrical power, the generator torque, and the mechanical electrical loss parameter.
In this embodiment, preferably, the rotational speed of the input end of the gearbox is calculated according to the rotational speed of the generator and the gearbox speed ratio. In this embodiment, the same calculation method as described above may be used to calculate the rotational speed of the input end of the gearbox.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (8)
1. A wind generating set gear box equivalent fatigue load monitoring method is characterized by comprising the following steps:
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
based on the torque and the rotating speed of the input end of the gear box, the equivalent fatigue load of the gear box is calculated by adopting an LDD fatigue calculation method, and the calculation formula is as follows:
wherein,,
is the ith data point, eta, of generator torque 1i Is the ith data point of electrical loss, +.>
Is the ith data point of mechanical loss, dt is the time interval of data acquisition, m is the test index of different positions of the gearbox, +.>
Is the i data point of the generator speed, n is the gearbox speed ratio;
calculating the torque at the gearbox input comprises:
calculating the electrical loss and the mechanical loss by adopting a linear interpolation method according to the output electrical power, the generator torque and the mechanical electrical loss parameters;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
2. The method for monitoring the equivalent fatigue load of a gearbox of a wind turbine generator system according to claim 1, wherein the rotational speed of the input end of the gearbox is calculated according to the rotational speed of the generator and the speed ratio of the gearbox.
3. The method for monitoring the fatigue state of the gearbox of the wind generating set on line is characterized by comprising the following steps of:
determining a design fatigue curve of a gearbox of the wind generating set according to the operation environment parameters of the wind generating set;
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
based on the torque and the rotating speed of the input end of the gear box, calculating to obtain the equivalent fatigue load of the gear box by adopting an LDD fatigue calculation method;
comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set;
calculating the torque at the gearbox input comprises:
calculating the electrical loss and the mechanical loss by adopting a linear interpolation method according to the output electrical power, the generator torque and the mechanical electrical loss parameters;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
4. The method for on-line monitoring of fatigue state of a gearbox of a wind turbine generator system according to claim 3, wherein the design fatigue curve is determined by adopting an analog simulation method according to the running environment parameters of the wind turbine generator system.
5. The method for on-line monitoring of fatigue state of a gearbox of a wind turbine generator system according to claim 3, wherein the rotational speed of the input end of the gearbox is calculated according to the rotational speed of the generator and the speed ratio of the gearbox.
6. A method of controlling a wind turbine generator system, comprising:
determining a design fatigue curve of a gearbox of the wind generating set according to the operation environment parameters of the wind generating set;
monitoring the output electric power, the generator torque and the generator rotating speed of the wind generating set;
calculating the torque and the rotating speed of the input end of the gear box by combining the output electric power, the torque of the generator and the rotating speed of the generator and the gear box speed ratio and the mechanical and electrical loss parameters;
based on the torque and the rotating speed of the input end of the gear box, the equivalent fatigue load of the gear box is calculated by adopting an LDD fatigue calculation method, and the calculation formula is as follows:
wherein,,
is the i-th data point of the generator torque, +.>
Is the ith data point of electrical loss, +.>
Is the ith data point of mechanical loss, dt is the time of data acquisitionInterval, m is the test index for different positions of the gearbox, < >>
Is the i data point of the generator speed, n is the gearbox speed ratio;
comparing the calculated equivalent fatigue load with a design fatigue curve to determine the fatigue state of the gearbox of the wind generating set;
according to the fatigue state of the gear box of the wind generating set, a corresponding control strategy is adopted to control the wind generating set;
calculating the torque at the gearbox input comprises:
calculating the electrical loss and the mechanical loss by adopting a linear interpolation method according to the output electrical power, the generator torque and the mechanical electrical loss parameters;
the torque at the input of the gearbox is calculated by generator torque, gearbox speed ratio, electrical losses and mechanical losses.
7. The method for controlling a wind turbine generator system according to claim 6, wherein the design fatigue curve is determined by using a simulation method according to an operation environment parameter of the wind turbine generator system.
8. The method of claim 6, wherein the rotational speed of the gearbox input is calculated based on the generator rotational speed and gearbox speed ratio.
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| EP2053241A1 (en) * | 2007-10-24 | 2009-04-29 | Ecotecnia Energias Renovables S.L. | Method for determining fatigue damage in a power train of a wind turbine |
| EP3317519B1 (en) * | 2015-06-30 | 2020-09-16 | Vestas Wind Systems A/S | Control method and system for wind turbines |
| CN106286151B (en) * | 2016-08-26 | 2019-03-22 | 中车株洲电力机车研究所有限公司 | A kind of Wind turbines slow-speed shaft torsional load monitoring method and loading analysis method |
| CN107590311B (en) * | 2017-08-08 | 2021-01-15 | 明阳智慧能源集团股份公司 | Planetary transmission gear box intensity calculation integrated system |
| WO2019214785A1 (en) * | 2018-05-07 | 2019-11-14 | Vestas Wind Systems A/S | Wind turbine control method |
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