CN118030379A - Wind turbine generator control method, device and storage medium in turbulent environment - Google Patents
Wind turbine generator control method, device and storage medium in turbulent environment Download PDFInfo
- Publication number
- CN118030379A CN118030379A CN202410100385.2A CN202410100385A CN118030379A CN 118030379 A CN118030379 A CN 118030379A CN 202410100385 A CN202410100385 A CN 202410100385A CN 118030379 A CN118030379 A CN 118030379A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- wind turbine
- storage system
- motor mode
- rotating speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000004146 energy storage Methods 0.000 claims abstract description 164
- 238000010248 power generation Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000011217 control strategy Methods 0.000 description 3
- 238000012876 topography Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Wind Motors (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention provides a wind turbine generator control method and device under a turbulent environment and a storage medium, and belongs to the field of wind power generation. The method comprises the following steps: acquiring rotor rotating speed of a wind turbine and state data of an energy storage system, wherein the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system; comparing the rotor speed of the wind turbine with the grid-connected speed, and if the rotor speed of the wind turbine is smaller than the grid-connected speed, determining that the motor mode needs to be switched; judging whether the energy storage system can support a motor mode according to the state data of the energy storage system; determining a motor mode duration from the energy storage system state data if it is determined that a motor mode needs to be switched and the energy storage system is capable of supporting the motor mode; the fan is controlled to switch to motor mode operation according to the motor mode duration. The distributed energy storage system is utilized to provide energy for the wind turbine, so that the fan works as a motor, and frequent start and stop of the wind turbine in a strong turbulence environment are reduced.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind turbine generator control method in a turbulent flow environment, a wind turbine generator control device in the turbulent flow environment and a machine-readable storage medium.
Background
Wind farms built in mountains and hilly areas of China are affected by weather, topography and wake flow, and wind turbines are operated in a strong turbulence environment frequently in wind speed and wind direction. The wind driven generator is frequently caused by sudden change of wind direction during grid-connected operation, the yaw speed of the generator set cannot follow the change of wind direction, so that the rotating speed of the impeller is lower than the grid-connected rotating speed in a short time, and the wind driven generator set adopting a conventional control strategy triggers underspeed protection to stop.
At the moment, the ambient wind speed is still higher than the starting wind speed of the fan, meanwhile, the fan also experiences the working condition that the impeller rotating speed frequently encounters the condition that the short-time or ultra-short-time wind speed of the wind turbine is lower than the cut-in wind speed at the grid-connected critical wind speed, and the wind turbine adopting the conventional control strategy triggers the underspeed protection to stop. After stopping, the wind speed is larger than the cut-in wind speed to meet the starting requirement, the machine set still needs to complete the state self-check of the subsystem and the automatic test of the safety item and then can start the machine for grid connection, and yawing is performed again for wind, so that the wind energy utilization rate of the wind power plant is reduced under the large turbulence topography. In addition, frequent start-up and shutdown can influence the whole mechanical transmission chain and grid-connected and pre-charging equipment of the wind turbine generator, so that the service life of the wind turbine generator is shortened, and the fault probability of the wind turbine generator is improved.
Disclosure of Invention
The invention aims to provide a method and a device for controlling a wind turbine under a turbulent environment, wherein a distributed energy storage system which is adapted to wind power is utilized to provide energy for the wind turbine under a specific condition, so that a fan works as a motor, the rotating speed of a rotor of the wind turbine meets the requirement of grid-connected rotating speed, the frequent start and stop of the wind turbine under a strong turbulent environment are reduced, the service life of the wind turbine is prolonged, and the fault probability of the wind turbine is reduced.
In order to achieve the above object, a first aspect of the present invention provides a method for controlling a wind turbine in a turbulent environment, the method comprising:
Acquiring rotor rotating speed of a wind turbine and state data of an energy storage system, wherein the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system;
Comparing the rotor speed of the wind turbine with the grid-connected speed, and if the rotor speed of the wind turbine is smaller than the grid-connected speed, determining that the motor mode needs to be switched;
judging whether the energy storage system can support a motor mode according to the state data of the energy storage system;
Determining a motor mode duration from the energy storage system state data if it is determined that a motor mode needs to be switched and the energy storage system is capable of supporting the motor mode;
The fan is controlled to switch to motor mode operation according to the motor mode duration.
According to the technical means, whether the motor mode needs to be switched or not in the current state is determined according to the running data of the wind turbine, real-time monitoring in the running process can be achieved, the energy storage system is adopted to supply power to the fan, the distributed energy storage system configured by the existing wind power plant is fully utilized, the fan works as a motor under the action of electric energy provided by the energy storage system, so that the rotating speed of the rotor of the wind turbine meets the grid-connected rotating speed requirement, frequent start and stop of the wind turbine under the high turbulence environment are reduced, the service life of the wind turbine is prolonged, and the fault probability of the wind turbine is reduced.
In an embodiment of the application, determining a motor mode duration from energy storage system state data includes:
Calculating rated discharge time according to rated capacity of the energy storage system and power consumption of the wind turbine generator;
calculating the residual discharge time according to the rated discharge time and the residual electric quantity of the energy storage system;
And comparing the residual discharge time with a preset time, and determining a smaller value as the duration of the motor mode.
According to the technical means, the time which can be supported by the residual electric quantity of the energy storage system can be calculated according to the power consumption of all wind turbine generator system components supplied by the energy storage system, and the duration of the motor mode is determined according to the time and the preset time in the motor mode.
In an embodiment of the present application, the method further includes:
If the wind turbine works as a motor for a duration of a motor mode and then the rotating speed of the rotor of the wind turbine is smaller than the grid-connected rotating speed, the wind turbine is directly stopped.
According to experience, the duration of unstable rotor speed of the wind turbine caused by turbulence is not too long, the preset time is determined based on the duration, if the finally determined motor mode duration is the preset time, at the moment, if the fan works as a motor and the motor mode duration still cannot meet the grid-connected rotation speed requirement, the condition that turbulence wind continuously occurs is indicated, and under the condition, the wind turbine is directly stopped, so that the wind turbine can be protected on one hand, and the waste of electric energy of an energy storage system can be avoided on the other hand; the residual discharge time is the discharge time which can be supported by the residual electric quantity of the energy storage system, if the finally determined motor mode duration is the residual discharge time which is the preset time, at this time, if the fan works as a motor to reach the motor mode duration, the grid-connected rotating speed requirement still cannot be met, and the energy storage system cannot provide electric energy for supporting the motor mode.
In an embodiment of the present application, the method further includes:
And in the motor mode, the rotor rotating speed of the wind turbine generator is monitored in real time, and when the rotor rotating speed is greater than or equal to the grid-connected rotating speed, the fan is controlled to be switched into the generator mode to work.
According to the technical means, the working mode of the wind turbine generator can be switched in time, and the waste of electric energy of the energy storage system is avoided.
In the embodiment of the application, judging whether the energy storage system can support the motor mode according to the state data of the energy storage system comprises the following steps:
And judging whether the electric quantity of the energy storage system is larger than or equal to a preset electric quantity value, and if the electric quantity of the energy storage system is larger than or equal to the preset electric quantity value, supporting a motor mode.
According to the technical means, whether the motor mode can be further judged according to the electric quantity of the energy storage system, if the electric quantity of the energy storage system is too low, even if the electric quantity of the energy storage system is switched to the motor mode, the wind turbine generator can not be supported to improve the rotating speed of the wind turbine generator rotor, the due effect can not be achieved, the electric quantity judgment can be carried out firstly, the fan can be effectively guaranteed to enter the motor mode, and the purpose of reducing frequent start and stop of the wind turbine generator is achieved.
In an embodiment of the present application, the method further includes:
Under the condition that the motor mode needs to be switched and the energy storage system can support the motor mode, the torque of the fan working as the motor when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator.
According to the technical means, the torque of the fan working as the motor can be accurately obtained, and the accurate control of the wind turbine can be realized.
In the embodiment of the application, the torque of the fan as the motor work when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator, and the method comprises the following steps:
Calculating a rotating speed difference value between the rotating speed of the rotor of the wind turbine and the grid-connected rotating speed;
Calculating the torque of the fan working as a motor according to the rotating speed difference value and the control gain of the PI controller:
τ= r（a0+a1Z-1）ωdif；
Wherein τ is the torque of the fan working as a motor, r is the control gain, a 0＝Ki*T/2+Kp,a1＝Ki*T/2-Kp,Kp、Ki and T are the proportional coefficient, the integral coefficient and the running period of the PI controller, and ω dif is the rotation speed difference.
According to the technical means, the exact torque of the fan as the motor is calculated, so that the reasonable utilization of energy of the energy storage system is realized, and the rotating speed of the rotor of the wind turbine is ensured to meet the grid-connected rotating speed requirement.
In an embodiment of the present application, the method further includes:
when the fan works as a motor, the yaw motor of the wind turbine generator is controlled to start yaw wind according to the average wind direction of the current preset time.
According to the technical means, when the rotational speed of the rotor of the wind turbine is stabilized by adopting the energy storage equipment, the energy of the energy storage system is utilized to perform real-time yaw wind facing so that the time consumption of the wind turbine for wind facing is shortened and the generating efficiency of the wind turbine is improved while the wind turbine can be stably operated in a grid-connected mode.
A second aspect of the present application provides a wind turbine generator control apparatus in a turbulent environment, the apparatus comprising:
the data acquisition unit is used for acquiring the rotating speed of the rotor of the wind turbine and the state data of the energy storage system, and the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system;
the mode switching unit is used for comparing the rotating speed of the rotor of the wind turbine generator with the grid-connected rotating speed, and determining that the motor mode needs to be switched if the rotating speed of the rotor of the wind turbine generator is smaller than the grid-connected rotating speed;
The energy storage judging unit is used for judging whether the energy storage system can support a motor mode according to the state data of the energy storage system;
A duration determining unit for determining a motor mode duration according to the energy storage system state data in case it is determined that the motor mode needs to be switched and the energy storage system is capable of supporting the motor mode;
and the execution unit is used for controlling the fan to be switched into the motor mode to work according to the duration time of the motor mode.
According to the technical means, whether the motor mode needs to be switched or not in the current state is determined according to the running data of the wind turbine, real-time monitoring in the running process can be achieved, the energy storage system is adopted to supply power to the fan, the distributed energy storage system configured by the existing wind power plant is fully utilized, the fan works as a motor under the action of electric energy provided by the energy storage system, so that the rotating speed of the rotor of the wind turbine meets the grid-connected rotating speed requirement, frequent start and stop of the wind turbine under the high turbulence environment are reduced, the service life of the wind turbine is prolonged, and the fault probability of the wind turbine is reduced.
A third aspect of the application provides a machine-readable storage medium having stored thereon instructions for causing a machine to perform the method of controlling a wind turbine in a turbulent environment.
Through the technical scheme, based on the distributed energy storage equipment, the energy storage system is adopted to supply power to the fan and all energy consumption components of the unit aiming at the short-time low wind speed/wind direction abrupt change condition under the strong turbulence environment, the conversion of the generator to the motor working mode is completed, and meanwhile, the real-time yaw of the wind is supported, so that the purposes of reducing the frequent start and stop of the unit and improving the grid-connected time and the wind energy utilization rate of the unit are achieved.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a topology diagram of a wind turbine and an energy storage system according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for controlling a wind turbine in a turbulent environment according to one embodiment of the present invention;
FIG. 3 is a flow chart of a method for generating wind turbines in a turbulent environment according to an embodiment of the present invention;
FIG. 4 is a block diagram of a wind turbine control device in a turbulent environment according to one embodiment of the present invention.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In order to ensure that the wind turbine generator can break suddenly at the wind speed and the wind direction, the impeller cannot be disconnected under the condition of insufficient kinetic energy and wind energy input, the rotating speed of the impeller needs to be kept above the disconnection rotating speed, and new energy needs to be introduced into the whole wind turbine generator system.
In recent years, energy storage devices using lithium iron phosphate batteries as cores are commercially developed from demonstration applications, and distributed energy storage devices capable of being adapted to wind power are one of main development directions of energy storage system applications, and energy storage has power storage and transmission functions.
In the embodiment of the application, the wind turbine generator and the energy storage system adopt a one-to-one combined access mode, and the energy storage system is connected to the low-voltage side of the wind turbine generator box. The energy storage system comprises an energy storage converter PSC, an energy storage battery, a battery management unit and a matching transformer, wherein the energy storage converter is connected with the energy storage battery and the matching transformer, and the battery management unit is connected with the energy storage converter and the energy storage battery. The wind turbine generator is provided with a fan and a fan box type transformer, the low-voltage side of the fan box type transformer is connected with the matching transformer, and the fan box type transformer is connected into a main power grid through a main transformer. The capacity of the energy storage system is selected according to the requirements, and in one embodiment, the capacity of the energy storage system is 20% of the capacity of the wind turbine generator, and the topological graph is shown in fig. 1.
FIG. 1 is a flowchart of a method for controlling a wind turbine in a turbulent environment according to an embodiment of the present invention. As shown in fig. 1, the method includes:
S1: and acquiring the rotor rotating speed of the wind turbine and the state data of the energy storage system. In the embodiment of the application, the rotating speed of the rotor of the wind turbine is recorded by the existing equipment or system on the wind turbine, and the method can be directly obtained from a fan control system without newly adding equipment for collection. The energy storage system state data includes: the residual electric quantity of the energy storage system and the rated capacity of the energy storage system can be directly obtained from the energy storage system. In some embodiments, the energy storage system power rating may be set to a set value in the method directly after the energy storage system is selected.
S2: comparing the rotor speed of the wind turbine with the grid-connected speed, and if the rotor speed of the wind turbine is smaller than the grid-connected speed, determining that the motor mode needs to be switched. And if the rotor rotating speed of the wind turbine is greater than or equal to the grid-connected rotating speed, the wind turbine operates in a generator mode.
According to the method, the state of the wind turbine can be determined according to the rotation speed of the wind turbine rotor, the wind turbine can be in a dangerous state of shutdown and disconnection under the condition that the rotation speed of the wind turbine rotor is smaller than the grid-connected rotation speed, and in the embodiment of the application, the motor switching mode is determined when the rotation speed of the wind turbine rotor is smaller than the grid-connected rotation speed, and different modes are adopted according to different states, so that the wind energy utilization rate of an electric field is improved.
S3: and judging whether the energy storage system can support the motor mode according to the state data of the energy storage system.
In the embodiment of the application, judging whether the energy storage system can support the motor mode according to the state data of the energy storage system comprises the following steps:
And judging whether the electric quantity of the energy storage system is larger than or equal to a preset electric quantity value, and if the electric quantity of the energy storage system is larger than or equal to the preset electric quantity value, supporting a motor mode. If the electric quantity of the energy storage system is smaller than the preset electric quantity value, at the moment, the energy storage system does not have enough electric energy to provide the fan to work as a motor, so that the wind turbine generator can be directly stopped under the condition.
In the embodiment of the application, the preset electric quantity value is set according to the requirement. In particular, the preset electrical quantity value may be zero. When the electric quantity of the energy storage system is judged to be greater than or equal to a preset electric quantity value, the motor mode signal position 1 indicates the motor mode to be started.
According to the technical means, whether the motor mode can be further judged according to the electric quantity of the energy storage system, if the electric quantity of the energy storage system is too low, even if the electric quantity of the energy storage system is switched to the motor mode, the wind turbine generator can not be supported to improve the rotating speed of the wind turbine generator rotor, the due effect can not be achieved, the electric quantity judgment can be carried out firstly, the fan can be effectively guaranteed to enter the motor mode, and the purpose of reducing frequent start and stop of the wind turbine generator is achieved.
S4: in the event that it is determined that the motor mode needs to be switched and the energy storage system is capable of supporting the motor mode, a motor mode duration is determined from the energy storage system state data.
In an embodiment of the application, determining a motor mode duration from energy storage system state data includes:
Calculating rated discharge time according to rated capacity of an energy storage system and power consumption of the wind turbine generator system:
t=s/P B, where T is the rated discharge time, S is the rated capacity of the energy storage system, the unit is kwh, and P B is the power consumption of the wind turbine. In some embodiments, when the wind turbine generator is arranged with the energy storage system, the direct type selection output power is similar to the power consumption of the wind turbine generator and can cover the power consumption of the wind turbine generator, so that when the rated discharge time is calculated, the output power of the energy storage system can be used for calculation.
In the embodiment of the application, the residual capacity of the energy storage system is displayed in percentage, so that the residual capacity=the residual capacity is equal to the rated discharge time.
And comparing the residual discharge time with a preset time, and determining a smaller value as the duration of the motor mode. In the embodiment of the application, the preset time is determined according to the estimated duration of unstable rotor speed of the wind turbine caused by turbulence, so that the turbulence action time period is spent in a state that the wind turbine is not stopped by supplementing the rotation speed of the wind turbine by an electric motor. The universal preset time of the current area can be estimated according to the turbulence forms of different geographic positions and topography conditions, and the more accurate preset time of the current area can be determined according to the turbulence forms of the current area of weather forecast.
According to the technical means, the time which can be supported by the residual electric quantity of the energy storage system can be calculated according to the power consumption of all wind turbine generator system components supplied by the energy storage system, and the duration of the motor mode is determined according to the time and the preset time in the motor mode.
S5: the fan is controlled to switch to motor mode operation according to the motor mode duration.
According to the technical means, whether the motor mode needs to be switched or not in the current state is determined according to the running data of the wind turbine, real-time monitoring in the running process can be achieved, the energy storage system is adopted to supply power to the fan, the distributed energy storage system configured by the existing wind power plant is fully utilized, the fan works as a motor under the action of electric energy provided by the energy storage system, so that the rotating speed of the rotor of the wind turbine meets the grid-connected rotating speed requirement, frequent start and stop of the wind turbine under the high turbulence environment are reduced, the service life of the wind turbine is prolonged, and the fault probability of the wind turbine is reduced.
In other embodiments of the present application, the method further comprises:
If the wind turbine works as a motor for a duration of a motor mode and then the rotating speed of the rotor of the wind turbine is smaller than the grid-connected rotating speed, the wind turbine is directly stopped.
According to experience, the duration of unstable rotor speed of the wind turbine caused by turbulence is not too long, the preset time is determined based on the duration, if the finally determined motor mode duration is the preset time, at the moment, if the fan works as a motor and the motor mode duration still cannot meet the grid-connected rotation speed requirement, the condition that turbulence wind continuously occurs is indicated, and under the condition, the wind turbine is directly stopped, so that the wind turbine can be protected on one hand, and the waste of electric energy of an energy storage system can be avoided on the other hand; the residual discharge time is the discharge time which can be supported by the residual electric quantity of the energy storage system, if the finally determined motor mode duration is the residual discharge time which is the preset time, at this time, if the fan works as a motor to reach the motor mode duration, the grid-connected rotating speed requirement still cannot be met, and the energy storage system cannot provide electric energy for supporting the motor mode.
In other embodiments of the present application, the method further comprises:
And in the motor mode, the rotor rotating speed of the wind turbine generator is monitored in real time, and when the rotor rotating speed is greater than or equal to the grid-connected rotating speed, the fan is controlled to be switched into the generator mode to work. Therefore, the working mode of the wind turbine generator can be switched in time, and the electric energy waste of the energy storage system is avoided.
In order to realize accurate control of the fan, under the condition that the motor mode needs to be switched and the energy storage system can support the motor mode, the torque of the fan serving as the motor when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator is also needed.
In the embodiment of the application, the torque of the fan as the motor work when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator, and the method comprises the following steps:
Calculating a rotating speed difference value between the rotating speed of the rotor of the wind turbine and the grid-connected rotating speed:
ωdif=ωs-ω；
wherein ω is the rotor speed of the wind turbine generator, and ω s is the grid-connected speed;
Calculating the torque of the fan working as a motor according to the rotating speed difference value and the control gain of the PI controller:
τ= r（a0+a1Z-1）ωdif；
Wherein τ is the torque of the fan working as a motor, r is the control gain, a 0＝Ki*T/2+Kp,a1＝Ki*T/2-Kp,Kp、Ki and T are the proportional coefficient, the integral coefficient and the running period of the PI controller, and ω dif is the rotation speed difference.
In the embodiment of the application, the PI controller is a master PI controller of the wind turbine, so that in order to compensate for the lack of rotation speed of the wind turbine, the gain is set to-1 on the basis of PI control under normal power generation control, that is, if the rotation speed of the rotor of the wind turbine is greater than or equal to the grid-connected rotation speed and the power generation power of the wind turbine is greater than zero, the gain of PI control is r 0, and the control gain r= -r 0 of the torque of the wind turbine working as a motor is calculated.
According to the technical means, the exact torque of the fan as the motor is calculated, so that the reasonable utilization of energy of the energy storage system is realized, and the rotating speed of the rotor of the wind turbine is ensured to meet the grid-connected rotating speed requirement.
In an embodiment of the present application, the method further includes:
When the fan works as a motor, the yaw motor of the wind turbine generator is controlled to start yaw wind according to the average wind direction of the current preset time. In one embodiment, the preset duration is 10 minutes.
According to the technical means, when the rotational speed of the rotor of the wind turbine is stabilized by adopting the energy storage equipment, the energy of the energy storage system is utilized to perform real-time yaw wind facing so that the time consumption of the wind turbine for wind facing is shortened and the generating efficiency of the wind turbine is improved while the wind turbine can be stably operated in a grid-connected mode.
It should be noted that, the above embodiment is only one implementation manner of the present application, in practical application, after the rotor speed of the wind turbine and the state data of the energy storage system are obtained, whether the energy storage system can support the motor mode may be determined according to the state data of the energy storage system, and then the rotor speed of the wind turbine and the grid-connected speed may be compared, or the two steps may be executed simultaneously. Likewise, the two steps of determining the motor mode duration based on the energy storage system state data, and calculating the torque at which the blower operates as a motor in motor mode, may be reversed in order, or performed simultaneously.
It should be noted that the above description is only one loop in the control method, and in actual operation, the method needs to be continuously and circularly executed. As shown in fig. 3, the energy storage system is shown in detail with a preset electric quantity value of 0 and a preset time of 60 s. And when the wind turbine operates in a conventional control strategy and a generator working mode, periodically acquiring the rotating speed of the wind turbine rotor according to a preset period, judging whether the rotating speed of the wind turbine rotor is smaller than the grid-connected rotating speed, if so, judging that the motor mode needs to be switched, and if the rotating speed of the wind turbine rotor is larger than or equal to the grid-connected rotating speed, operating in the generator mode. Under the condition that the motor mode needs to be switched, the residual electric quantity of the energy storage system and the rated capacity of the energy storage system are obtained, if the residual electric quantity is larger than 0, the energy storage system is determined to be disconnected to be capable of supporting the motor mode, otherwise, the machine set is stopped and disconnected. Under the condition that the energy storage system can support the motor mode, calculating the torque of the fan as the motor working when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator, calculating the residual discharging time T max according to the residual electric quantity of the energy storage system, comparing T max with 60s, if T max is larger than 60s, determining the duration of the motor mode to be 60s, otherwise, determining the duration of the motor mode to be T max. Then the fan working mode is converted into a motor mode, the energy storage system supplies power to the fan, in practical application, the countdown module is set to time the duration of the motor mode, the fan begins to work as a motor and begins to count down, and the rotor speed of the wind turbine is continuously acquired and judged in the countdown. If the rotor rotating speed of the wind turbine is larger than or equal to the grid-connected rotating speed in the countdown period, judging that the current rotor rotating speed of the wind turbine is recovered to the grid-connected rotating speed, controlling the fan to be switched into a generator mode, and stopping power supply of the energy storage system, otherwise, continuing the motor mode work of the fan, and supplying power for the fan by the energy storage system. And if the countdown is finished, the rotor rotating speed of the wind turbine is greater than or equal to the grid-connected rotating speed, the fan is controlled to be switched into a generator mode, and if the rotor rotating speed of the wind turbine is still smaller than the grid-connected rotating speed, the wind turbine is directly stopped and disconnected.
After the fan starts to work as a motor, the yaw motor of the wind turbine generator is controlled to start yaw for wind according to the current average wind direction of 10 min.
A second aspect of the present application provides a wind turbine generator control apparatus in a turbulent environment, as shown in fig. 4, the apparatus including:
the data acquisition unit is used for acquiring the rotating speed of the rotor of the wind turbine and the state data of the energy storage system, and the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system;
the mode switching unit is used for comparing the rotating speed of the rotor of the wind turbine generator with the grid-connected rotating speed, and determining that the motor mode needs to be switched if the rotating speed of the rotor of the wind turbine generator is smaller than the grid-connected rotating speed;
The energy storage judging unit is used for judging whether the energy storage system can support a motor mode according to the state data of the energy storage system;
A duration determining unit for determining a motor mode duration according to the energy storage system state data in case it is determined that the motor mode needs to be switched and the energy storage system is capable of supporting the motor mode;
and the execution unit is used for controlling the fan to be switched into the motor mode to work according to the duration time of the motor mode.
According to the technical means, whether the motor mode needs to be switched or not in the current state is determined according to the running data of the wind turbine, real-time monitoring in the running process can be achieved, the energy storage system is adopted to supply power to the fan, the distributed energy storage system configured by the existing wind power plant is fully utilized, the fan works as a motor under the action of electric energy provided by the energy storage system, so that the rotating speed of the rotor of the wind turbine meets the grid-connected rotating speed requirement, frequent start and stop of the wind turbine under the high turbulence environment are reduced, the service life of the wind turbine is prolonged, and the fault probability of the wind turbine is reduced.
In other embodiments, as shown in fig. 4, the wind turbine generator control device in the turbulent environment further includes:
And the torque calculation unit is used for calculating the torque of the fan working as the motor when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator under the condition that the energy storage system can support the electric mode.
A third aspect of the application provides a machine-readable storage medium having stored thereon instructions for causing a machine to perform the method of controlling a wind turbine in a turbulent environment.
Through the technical scheme, based on the distributed energy storage equipment, the energy storage system is adopted to supply power to the fan and all energy consumption components of the unit aiming at the short-time low wind speed/wind direction abrupt change condition under the strong turbulence environment, the conversion of the generator to the motor working mode is completed, and meanwhile, the real-time yaw of the wind is supported, so that the purposes of reducing the frequent start and stop of the unit and improving the grid-connected time and the wind energy utilization rate of the unit are achieved.
Those skilled in the art will appreciate that all or part of the steps in a method for implementing the above embodiments may be implemented by a program stored in a storage medium, where the program includes several instructions for causing a single-chip microcomputer, chip or processor (processor) to perform all or part of the steps in a method according to the embodiments of the invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The alternative embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the embodiments of the present invention are not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the embodiments of the present invention within the scope of the technical concept of the embodiments of the present invention, and all the simple modifications belong to the protection scope of the embodiments of the present invention. In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the various possible combinations of embodiments of the invention are not described in detail.
In addition, any combination of the various embodiments of the present invention may be made, so long as it does not deviate from the idea of the embodiments of the present invention, and it should also be regarded as what is disclosed in the embodiments of the present invention.
Claims (10)
1. A method for controlling a wind turbine in a turbulent environment, the method comprising:
Acquiring rotor rotating speed of a wind turbine and state data of an energy storage system, wherein the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system;
Comparing the rotor speed of the wind turbine with the grid-connected speed, and if the rotor speed of the wind turbine is smaller than the grid-connected speed, determining that the motor mode needs to be switched;
judging whether the energy storage system can support a motor mode according to the state data of the energy storage system;
Determining a motor mode duration from the energy storage system state data if it is determined that a motor mode needs to be switched and the energy storage system is capable of supporting the motor mode;
The fan is controlled to switch to motor mode operation according to the motor mode duration.
2. The method of claim 1, wherein determining the motor mode duration from the energy storage system state data comprises:
Calculating rated discharge time according to rated capacity of the energy storage system and power consumption of the wind turbine generator;
calculating the residual discharge time according to the rated discharge time and the residual electric quantity of the energy storage system;
and comparing the residual discharge time with a preset time, and determining a smaller value as the duration of the motor mode, wherein the preset time is the estimated duration of unstable rotating speed of the rotor of the wind turbine generator caused by turbulence.
3. The method for controlling a wind turbine generator in a turbulent environment according to claim 2, further comprising:
If the wind turbine works as a motor for a duration of a motor mode and then the rotating speed of the rotor of the wind turbine is smaller than the grid-connected rotating speed, the wind turbine is directly stopped.
4. The method for controlling a wind turbine generator in a turbulent environment according to claim 2, further comprising:
And in the motor mode, the rotor rotating speed of the wind turbine generator is monitored in real time, and when the rotor rotating speed is greater than or equal to the grid-connected rotating speed, the fan is controlled to be switched into the generator mode to work.
5. The method for controlling a wind turbine generator system in a turbulent environment according to any one of claims 1-4, wherein determining whether the energy storage system can support the motor mode based on the energy storage system status data comprises:
And judging whether the electric quantity of the energy storage system is larger than or equal to a preset electric quantity value, and if the electric quantity of the energy storage system is larger than or equal to the preset electric quantity value, supporting a motor mode.
6. A method of controlling a wind turbine in a turbulent environment as claimed in any one of claims 1 to 4, further comprising:
Under the condition that the motor mode needs to be switched and the energy storage system can support the motor mode, the torque of the fan working as the motor when the motor mode is calculated according to the grid-connected rotating speed and the running data of the wind turbine generator.
7. The method according to claim 6, wherein calculating the torque of the fan as the motor in the motor mode based on the grid-connected rotational speed and the operation data of the wind turbine, comprises:
Calculating a rotating speed difference value between the rotating speed of the rotor of the wind turbine and the grid-connected rotating speed;
Calculating the torque of the fan working as a motor according to the rotating speed difference value and the control gain of the PI controller:
τ= r（a0+a1Z-1）ωdif；
Wherein τ is the torque of the fan working as a motor, r is the control gain, a 0＝Ki*T/2+Kp,a1＝Ki*T/2-Kp,Kp、Ki and T are the proportional coefficient, the integral coefficient and the running period of the PI controller, and ω dif is the rotation speed difference.
8. The method for controlling a wind turbine generator in a turbulent environment according to claim 1, further comprising:
when the fan works as a motor, the yaw motor of the wind turbine generator is controlled to start yaw wind according to the average wind direction of the current preset time.
9. A wind turbine generator control apparatus in a turbulent environment, the apparatus comprising:
the data acquisition unit is used for acquiring the rotating speed of the rotor of the wind turbine and the state data of the energy storage system, and the state data of the energy storage system comprises: residual electric quantity of the energy storage system and rated capacity of the energy storage system;
the mode switching unit is used for comparing the rotating speed of the rotor of the wind turbine generator with the grid-connected rotating speed, and determining that the motor mode needs to be switched if the rotating speed of the rotor of the wind turbine generator is smaller than the grid-connected rotating speed;
The energy storage judging unit is used for judging whether the energy storage system can support a motor mode according to the state data of the energy storage system;
A duration determining unit for determining a motor mode duration according to the energy storage system state data in case it is determined that the motor mode needs to be switched and the energy storage system is capable of supporting the motor mode;
and the execution unit is used for controlling the fan to be switched into the motor mode to work according to the duration time of the motor mode.
10. A machine-readable storage medium having instructions stored thereon for causing a machine to perform the method of controlling a wind turbine in a turbulent environment according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410100385.2A CN118030379A (en) | 2024-01-24 | 2024-01-24 | Wind turbine generator control method, device and storage medium in turbulent environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410100385.2A CN118030379A (en) | 2024-01-24 | 2024-01-24 | Wind turbine generator control method, device and storage medium in turbulent environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118030379A true CN118030379A (en) | 2024-05-14 |
Family
ID=91001447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410100385.2A Pending CN118030379A (en) | 2024-01-24 | 2024-01-24 | Wind turbine generator control method, device and storage medium in turbulent environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118030379A (en) |
-
2024
- 2024-01-24 CN CN202410100385.2A patent/CN118030379A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102777319B (en) | Yaw control system for wind power generation and control method thereof | |
| CA2759305C (en) | Method and system for controlling an electric device of a wind turbine | |
| KR102249662B1 (en) | Marine integrated power control management system | |
| CN112803453B (en) | Flywheel energy storage system, control method of flywheel energy storage system and storage medium | |
| CN109301865A (en) | The control method and communication management system of energy-storage system for Wind turbines | |
| CN101639040A (en) | Method and device for controlling low-voltage operation of wind generating set | |
| KR101211114B1 (en) | Device and method for low voltage ride through of wind generator | |
| EP2932093A1 (en) | Method and arrangement for swift power regulation | |
| EP3703213A1 (en) | System and method for operating a hybrid energy facility having multiple power sources | |
| CN111817338B (en) | Black-start control method and system for wind-solar new energy power station | |
| CN107630785A (en) | Wind turbines Protection control system under one kind of multiple operating modes | |
| JP2000202441A (en) | Operating device for sea water desalting device by wind power generator and sea water desalting method | |
| CN101860074B (en) | Control method based on backup power system of fuel cell | |
| CN106930899B (en) | The electric power system and method for supplying power to of a kind of yaw motor in wind turbine | |
| CN118030379A (en) | Wind turbine generator control method, device and storage medium in turbulent environment | |
| CN115313425A (en) | Primary frequency modulation and energy storage control method for wind and energy storage integrated power generation unit | |
| CN114893873A (en) | Air conditioner control method and device and air conditioner | |
| CN113685315A (en) | Energy double-control management method and system suitable for wind generating set | |
| CN206448901U (en) | Energy-saving aerogenerator group | |
| EP4141256A1 (en) | Operation of a disconnected wind turbine | |
| CN219549024U (en) | Yaw soft start-based wind generating set control system | |
| US20240183335A1 (en) | Operating a wind turbine in a wind power plant during loss of communication | |
| US10697432B2 (en) | Wind farm energy storage device for curtailment and auxiliary loads use | |
| JP2006057469A (en) | Wind power generation system and method for controlling the same | |
| CN109763935B (en) | Control method for miniature wind driven generator of standby power supply system of wind turbine generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |