WO2017135657A1 - Procédé de commande de commutation de mode de couple destiné à maintenir une sortie nominale de turbine éolienne et système correspondant - Google Patents

Procédé de commande de commutation de mode de couple destiné à maintenir une sortie nominale de turbine éolienne et système correspondant Download PDF

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Publication number
WO2017135657A1
WO2017135657A1 PCT/KR2017/001044 KR2017001044W WO2017135657A1 WO 2017135657 A1 WO2017135657 A1 WO 2017135657A1 KR 2017001044 W KR2017001044 W KR 2017001044W WO 2017135657 A1 WO2017135657 A1 WO 2017135657A1
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Prior art keywords
torque
pitch angle
rotation speed
rated
generator
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PCT/KR2017/001044
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English (en)
Korean (ko)
Inventor
임채욱
Original Assignee
한밭대학교 산학협력단
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Priority claimed from KR1020160013943A external-priority patent/KR101716073B1/ko
Priority claimed from KR1020160013944A external-priority patent/KR101716074B1/ko
Application filed by 한밭대학교 산학협력단 filed Critical 한밭대학교 산학협력단
Publication of WO2017135657A1 publication Critical patent/WO2017135657A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • 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
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

  • the present invention relates to a torque mode switch control method and system for maintaining a rated output of a wind turbine. More specifically, the present invention relates to a torque mode switch control method and system for maintaining a rated torque of a wind turbine, and a torque mode switch control method and system for maintaining a rated output power of a wind turbine.
  • a wind turbine is a machine that converts kinetic energy of wind into mechanical energy through blade rotation and converts mechanical energy into electrical energy using a generator.
  • the output control method of the wind turbine can be conceptually divided into two methods: torque control for controlling the rotational speed of the generator and pitch control for controlling the pitch angle. Torque control is performed in the area under the rated wind speed, and pitch control is performed in the area above the rated wind speed.
  • the torque controller controls the torque size of the generator to obtain the maximum output in the region below the rated wind speed, and the pitch controller adjusts the pitch angle to maintain the rated output in the region above the rated wind speed.
  • Torque controllers in wind turbines have two control logics above rated output. One of them is to maintain the constant torque level of the generator at the rated torque, and the other is to maintain the constant output power of the generator at the rated output power.
  • the torque mode switch control method of a general wind turbine takes into account two types of information: the generator rotation speed and the blade pitch. If the rotation speed of the generator is higher than the rated rotation speed and the pitch angle is larger than the fine pitch angle, it is determined that it is higher than the rated wind speed, and adjust the torque size of the generator to maintain the rated output power using the torque mode switch. .
  • the generator is judged to be below the rated wind speed, and the generator follows the lookup table calculated in advance using the torque mode switch. Adjust the torque
  • the present invention has been made to solve the above conventional problems, according to an embodiment of the present invention, the torque mode switch in the torque control when the wind speed drops sharply from above the rated wind speed to below the rated wind speed in the torque control It is an object of the present invention to provide a torque mode switch control method and system for maintaining a rated torque of a wind turbine capable of preventing a torque chattering problem and stably operating a torque controller.
  • Torque mode switch control method for maintaining the rated output power of the wind turbine that can prevent the torque chatter generated when using the torque mode switch when the wind energy falls sharply from above the rated output to below the rated output through the present invention and its The purpose is to provide a system.
  • the rotational speed measuring unit for measuring the generator rotational speed in real time;
  • a pitch controller for calculating the pitch command angle of the blade in real time;
  • a pitch angle limiter unit for limiting a pitch command angle to determine a pitch angle of an actual blade;
  • a torque mode switch for selecting a mode value based on the rotation speed measured by the rotation speed measurement unit and the pitch angle determined by the pitch controller and the pitch angle limiter;
  • a torque controller controlling the torque of the generator according to the mode value selected by the torque mode switch, wherein the torque mode switch selects the first mode value when it is determined that the rated wind speed is less than the rotation speed and the pitch angle.
  • the rated wind speed is equal to or greater than the rated wind speed
  • selects a second mode value and, in the case of the first mode value, controls the generator torque to a torque value according to a pre-calculated rotation speed, and the second mode.
  • the generator torque is controlled by a rated torque
  • the torque mode switch selects the second mode value when the rotation speed is greater than the rated rotation speed and the pitch angle exceeds the fine pitch angle
  • the second mode value is selected when the rotational speed is equal to or greater than the rated rotational speed and the pitch angle is equal to or less than the fine pitch angle;
  • the torque value according to the previously calculated rotation speed may be calculated by the following equation (1) and (2).
  • ⁇ g is the generator rotation speed
  • T g (t) is the generator torque controlled at the first mode value
  • K opt is the optimum mode gain
  • C P max is the maximum output coefficient
  • ⁇ opt is the optimum speed ratio
  • R is the blade length
  • ⁇ is the air density
  • N gb is the gear ratio.
  • the pitch angle is maintained as a fine pitch angle, and the pitch controller is based on the error between the rotation speed and the rated rotation speed when the rotation speed exceeds the rated rotation speed.
  • the angle may be calculated, and the pitch angle limiter may determine the pitch angle of the actual blade by limiting the pitch command angle between a predetermined minimum pitch angle and a maximum pitch angle.
  • a second object of the present invention the step of setting the rated rotation speed, fine pitch angle, rated torque size;
  • a rotation speed measurement unit measuring the generator rotation speed in real time, the pitch controller calculating the pitch command angle of the blade in real time, and the pitch angle limiting unit determining the actual pitch angle of the blade by limiting the pitch command angle;
  • Selecting a mode value by the torque mode switch based on the rotation speed measured by the rotation speed measuring unit and the pitch angle determined by the pitch controller and the pitch angle limiting unit;
  • a torque controller controlling the torque of the generator according to the mode value selected by the torque mode switch.
  • the torque mode switch has a rated wind speed based on the rotational speed and the pitch angle.
  • the torque controller in the case of the first mode value, according to the calculated rotation speed
  • the torque speed is equal to or greater than the rated rotation speed. If the pitch angle exceeds the fine pitch angle, the second mode value is selected, the rotation speed is greater than the rated rotation speed, and the pitch angle is fine pitch.
  • the second mode value is selected in the following case, and when the rotation speed is less than the rated rotation speed and the pitch angle exceeds the fine pitch angle, the previously selected mode value is selected as it is, and the rotation speed is less than the rated rotation speed.
  • the pitch angle is less than the fine pitch angle can be achieved as a torque mode switch control method for maintaining the rated output of the wind turbine, characterized in that for selecting the first mode value.
  • the torque value according to the previously calculated rotation speed may be calculated by the following equation (1) and (2).
  • Equation 1 ⁇ g is the generator rotational speed, T g (t) is the generator torque controlled at the first mode value, K opt is the optimum mode gain, Equation 2, C P, max is the maximum output coefficient, ⁇ opt is the optimum speed ratio, R is the blade length, ⁇ is the air density and N gb is the gear ratio.
  • the pitch angle is maintained as a fine pitch angle, and the pitch controller is based on the error between the rotation speed and the rated rotation speed when the rotation speed exceeds the rated rotation speed.
  • the angle may be calculated, and the pitch angle limiter may determine the pitch angle of the actual blade by limiting the pitch command angle between a predetermined minimum pitch angle and a maximum pitch angle.
  • a third object of the present invention is a rotational speed measuring unit for measuring the rotational speed of the generator in real time;
  • a pitch controller for calculating the pitch command angle of the blade in real time;
  • a pitch angle limiter unit for limiting a pitch command angle to determine a pitch angle of an actual blade; Based on the rotation speed measured by the rotation speed measurement unit and the pitch angle determined by the pitch controller and the pitch angle limiter unit, if it is determined that the wind energy is less than the rated output power, the first mode value is selected.
  • a torque mode switch for selecting two mode values; And when the mode value selected by the torque mode switch is the first mode value, controls the generator torque size to a torque value according to a pre-calculated rotational speed, and in the case of the second mode value, maintains a constant output power rating.
  • Including a torque controller for controlling the generator torque to the generator torque size, the generator torque size to control the generator when the second mode value is selected is defined by the following equation (4), the torque mode switch, Selecting the second mode value when the rotational speed is equal to or greater than the rated rotational speed and the pitch angle exceeds the fine pitch angle; and when the rotational speed is equal to or greater than the rated rotational speed and the pitch angle is less than or equal to the fine pitch angle Select a mode value, and if the rotation speed is less than the rated rotation speed and the pitch angle exceeds the fine pitch angle, the previously selected mode value is selected as it is. And, when the rotation speed is less than the rated rotation speed and the pitch angle is less than or equal to the fine pitch angle, the first mode value is selected.
  • the torque mode switch control system for maintaining the rated output of the wind turbine can be achieved. .
  • Equation 4 P grat is the rated output power, ⁇ g is the generator rotation speed.
  • the torque value according to the previously calculated rotation speed may be calculated by the following equation (1) and (2).
  • Equation 1 ⁇ g is the generator rotation speed, T g (t) is the generator torque controlled at the first mode value, K opt is the optimum mode gain, Equation 2 C P, max is the maximum output coefficient, ⁇ opt Is the optimum speed ratio, R is the blade length, ⁇ is the air density, and N gb is the gear ratio.
  • the pitch controller is the pitch command based on the error of the rotational speed and the rated rotational speed when the rotational speed exceeds the rated rotational speed
  • the angle may be calculated, and the pitch angle limiter may determine the pitch angle of the actual blade by limiting the pitch command angle between a predetermined minimum pitch angle and a maximum pitch angle.
  • a fourth object of the present invention the step of setting the rated output power, the rated rotational speed, the fine pitch angle;
  • a rotation speed measurement unit measuring the generator rotation speed in real time, the pitch controller calculating the pitch command angle of the blade in real time, and the pitch angle limiting unit determining the actual pitch angle of the blade by limiting the pitch command angle;
  • Selecting a mode value by the torque mode switch based on the rotation speed measured by the rotation speed measuring unit and the pitch angle determined by the pitch controller and the pitch angle limiting unit; And controlling, by the torque controller, the torque of the generator according to the mode value selected by the torque mode switch.
  • the torque mode switch has wind energy based on the rotational speed and the pitch angle.
  • the torque controller determines whether the rated output is less than the first mode value is selected, if it is determined that the rated output is greater than the second mode value, and in the controlling step, the torque controller, in the case of the first mode value, The generator torque size is controlled by the torque value according to the rotation speed, and in the case of the second mode value, the generator torque is controlled by the generator torque size which is kept constant at the rated output power, and when the second mode value is selected.
  • the generator torque size to control the generator is defined by Equation 4 below, and in the selecting step, the torque mode switch, the rotation speed is The second mode value is selected when the rated rotation speed is greater than and the pitch angle exceeds the fine pitch angle, and when the rotation speed is greater than the rated rotation speed and the pitch angle is equal to or less than the fine pitch angle, the second mode value is selected. And if the rotational speed is less than the rated rotational speed and the pitch angle exceeds the fine pitch angle, the previously selected mode value is selected as it is, the rotational speed is less than the rated rotational speed, and the pitch angle is the fine pitch.
  • the angle is less than the first mode value can be achieved as a torque mode switch control method for maintaining the rated output of the wind turbine.
  • Equation 4 P grat is the rated output power, ⁇ g is the generator rotation speed.
  • the torque value according to the pre-calculated rotational speed may be calculated by Equation 1 and Equation 2 below.
  • Equation 1 ⁇ g is the generator rotation speed, T g (t) is the generator torque controlled at the first mode value, K opt is the optimum mode gain and in Equation 2, C P, max is the maximum output coefficient, ⁇ opt Is the optimum speed ratio, R is the blade length, ⁇ is the air density, and N gb is the gear ratio.
  • the pitch angle is maintained as a fine pitch angle, and the pitch controller is based on the error between the rotation speed and the rated rotation speed when the rotation speed exceeds the rated rotation speed.
  • the angle may be calculated, and the pitch angle limiter may determine the pitch angle of the actual blade by limiting the pitch command angle between a predetermined minimum pitch angle and a maximum pitch angle.
  • the torque mode switch control method for maintaining the rated torque of the wind turbine according to an embodiment of the present invention, when the wind speed drops rapidly from above the rated wind speed to below the rated wind speed in the torque control of the wind turbine caused by the torque mode switch Torque chattering problem can be prevented, and the torque controller can be operated stably.
  • the torque mode switch control method for maintaining the rated torque of the wind turbine considering both information of the generator rotation speed and blade pitch angle, the wind speed is rated output above the rated output In the case of abrupt changes below, the value of the torque mode switch is used as the "previous value", thereby preventing torque chattering.
  • the torque mode switch control method for maintaining the rated output power of the wind turbine when the wind energy fluctuates near the rated output of the wind turbine, the rated output of the generator is maintained above the rated output And below the rated output, it has the effect that the torque controller can be operated stably so that torque chatter occurs when the torque mode switch is used to produce the maximum output.
  • the torque mode switch control method for maintaining the rated output power of the wind turbine considering both information of the generator rotation speed and the blade pitch angle, the wind energy is above the rated output In case of abrupt change below the rated output, the value of torque mode switch is used as the “previous value”.
  • the present invention has an effect that can prevent the torque chatter generated when using the torque mode switch when the wind energy falls sharply below the rated output from above the rated output.
  • FIG. 1 is a block diagram showing the configuration of a torque mode switch control system for maintaining the rated output of a wind turbine according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a torque mode switch control method for maintaining a rated torque of a wind turbine according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a torque mode switch control method for maintaining a rated output power of a wind turbine according to an embodiment of the present invention
  • Figure 4 is a torque mode switch control method for maintaining the rated torque of the wind turbine according to an embodiment of the present invention, the generator torque graph for the generator rotational speed,
  • Figure 5 is a torque mode switch control method for maintaining the rated output power of the wind turbine according to an embodiment of the present invention, the generator torque graph for the generator rotational speed,
  • FIG. 6 is a block diagram of a pitch controller according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing a torque mode switch control method for maintaining a rated torque of a wind turbine according to a first embodiment of the present invention
  • FIG. 8 is a block diagram of a torque mode switch of a torque mode switch control system for maintaining a rated torque of a wind turbine according to a first embodiment of the present invention
  • FIG. 11 is a torque chattering analysis graph according to a first embodiment of a torque mode switch control method for maintaining a rated torque of a wind turbine according to the present invention
  • FIG. 12 is a pitch angle response graph according to a first embodiment of a torque mode switch control method for maintaining rated torque of a wind turbine according to the present invention
  • FIG. 13 is a step response graph according to the second embodiment of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine
  • FIG. 14 is a torque chattering analysis graph according to a second embodiment of a torque mode switch control method for maintaining rated torque of a wind turbine according to the present invention
  • 15 is a graph illustrating a step response comparison between a first embodiment and a second embodiment of a torque mode switch control method for maintaining rated torque of a wind turbine according to the present invention
  • 16 is a block diagram of a torque mode switch according to a second embodiment of the torque mode switch control method for maintaining a rated torque of a wind turbine of the present invention
  • 17 is a graph of the turbulent wind speed according to the time of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine,
  • FIG. 18 is a graph showing that the rated wind speed is lower than that in FIG. 17;
  • 19 is a graph showing the results of numerical tests of turbulent wind velocity (1) according to the first embodiment of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine;
  • FIG. 21 is a graph of a numerical experiment result (3) of a turbulent wind velocity according to a first embodiment of a torque mode switch control method for maintaining a rated torque of a wind turbine according to the present invention
  • FIG. 22 is a graph showing the results of a numerical wind speed experiment (1) according to the second embodiment of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine,
  • FIG. 23 is a graph showing the results of numerical tests of turbulent wind speed (2) according to the second embodiment of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine;
  • FIG. 24 is a graph showing the numerical results of the turbulent wind speed experiment (3) according to the second embodiment of the torque mode switch control method for maintaining the rated torque of the present invention wind turbine.
  • 25 is a block diagram showing a torque mode switch control method for maintaining a rated output power of a wind turbine according to a first embodiment of the present invention
  • 26 is a block diagram of a torque mode switch of a torque mode switch control system for maintaining rated output power of a wind turbine according to a first embodiment of the present invention
  • 27 is a wind speed graph with respect to time showing the stair wind speed
  • 29 is a torque chattering analysis graph according to a first embodiment of a torque mode switch control method for maintaining a rated output power of a wind turbine according to the present invention
  • FIG. 34 is a block diagram of a torque mode switch according to a second embodiment of the torque mode switch control method for maintaining the rated output power of the wind turbine of the present invention
  • 35 is a graph of turbulent wind speed according to the time of the torque mode switch control method for maintaining the rated output power of the present invention wind turbine
  • FIG. 36 is a graph showing that the rated wind speed is lower than that in FIG. 35;
  • FIG. 40 is a graph showing the results of numerical tests of turbulent wind speed (1) according to the second embodiment of the torque mode switch control method for maintaining the rated output power of the wind turbine according to the present invention
  • 41 is a graph showing the results of numerical tests of turbulent wind speed (2) according to the second embodiment of the torque mode switch control method for maintaining the rated output power of the wind turbine according to the present invention
  • FIG. 42 is a graph illustrating the numerical results of the turbulent wind speed experiment (3) according to the second embodiment of the torque mode switch control method for maintaining the rated output power of the wind turbine according to the present invention.
  • Torque mode switch control system and control method for maintaining the rated output of the wind turbine According to an embodiment of the present invention, Torque mode switch control system and control method for maintaining the rated output according to an embodiment of the present invention, torque mode switch control system and control method for maintaining the rated torque, and torque mode switch control system for maintaining the rated output power and It is classified as a control method.
  • Figure 1 shows a block diagram showing the configuration of a torque mode switch control system for maintaining the rated output of a wind turbine according to an embodiment of the present invention
  • Figure 2 is according to an embodiment of the present invention
  • a flowchart of a torque mode switch control method for maintaining a rated torque of a wind turbine is shown.
  • 3 is a flowchart illustrating a torque mode switch control method for maintaining a rated output power of a wind turbine according to an embodiment of the present invention.
  • the torque mode switch control system for maintaining the rated output of the wind turbine according to an embodiment of the present invention, the rotation speed measuring unit 10, pitch angle limiting unit 20, torque mode It can be seen that it can be configured to include a switch 30, torque controller 40, pitch controller 50, and the like.
  • FIG. 4 is a torque mode switch control method for maintaining a rated torque of a wind turbine according to an embodiment of the present invention.
  • Torque controller 40 of the wind turbine can be divided into two cases when the rated output or more. As shown in FIG. 4, the "torque mode 1" is divided into a case of less than the rated output and the “torque mode 2" of more than the rated output. As will be explained later, when the first mode value is selected by the torque mode switch 30, the torque controller 40 moves the generator torque to the torque mode 1 when the second mode value is selected. Control.
  • SpeedSet1 is the generator rotational speed at which the control of the generator torque magnitude is started.
  • SpeedSet2 is generally the generator rotational speed when the generator starts to maintain the rated torque size or rated output power. The rated rotation speed of the generator.
  • Torque controller 40 in the rated power under optimal state sokbi ( ⁇ opt) torque in order to obtain, depending on the velocity magnitude - by using Equation 1 below represents the steady-state relationship between the characteristics of the speed torque (T g of the generator ) Is controlled in proportion to the square of the generator's rotational speed ( ⁇ g ).
  • the torque controller 40 below the rated power generates the generator torque using a calculated lookup table as indicated in the "torque mode 1" shown in FIG.
  • K opt is an optimal mode gain and is a coefficient value representing the secondary characteristic between the torque of the generator and the rotational speed of the generator, and is defined as in Equation 2 below.
  • C P max is the maximum power factor
  • ⁇ opt is the optimum peripheral speed ratio
  • R is the blade length
  • ⁇ is the air density
  • N gb is the gear ratio
  • the torque controller 40 of the wind turbine has two control logic when the rated output or more. One is to maintain the constant torque size of the generator at the rated torque, and the other is to maintain the constant output power of the generator at the rated output power.
  • One embodiment for maintaining the rated torque of the present invention uses a control method for maintaining a constant torque size of the generator as indicated by the "torque mode 2" in FIG.
  • the formula for maintaining the constant torque size of the generator at the rated torque size is as shown in Equation 3 below.
  • Figure 5 is a torque mode switch control method for maintaining the rated output power of the wind turbine according to an embodiment of the present invention, shows a generator torque graph for the generator rotational speed.
  • Equation 4 the power output of the generator is inversely related to the rotational speed of the generator.
  • the torque mode switch control method for maintaining the rated torque of the wind turbine first to set the rated rotation speed, fine pitch angle, rated torque size (S1).
  • the rotational speed measuring unit 10 measures the generator rotational speed in real time
  • the pitch controller 50 calculates the pitch command angle of the blade in real time
  • the pitch angle limiting unit 20 limits the pitch command angle To determine the pitch angle of the actual blade
  • the torque mode switch 30 selects a mode value based on the rotation speed measured by the rotation speed measurement unit 10 and the pitch angle determined by the pitch controller 50 and the pitch angle limiter unit 20. (S3).
  • the torque controller 40 controls the torque of the generator according to the mode value selected by the torque mode switch 30 (S4).
  • the torque mode switch 30 selects the first mode value when it is determined to be less than the rated wind speed based on the rotational speed and the pitch angle, and selects the second mode value when it is determined to be greater than the rated wind speed.
  • the torque controller 40 controls the generator torque with the torque value according to the calculated rotation speed in the case of the first mode value, and the generator torque with the rated torque in the case of the second mode value. Will be controlled.
  • control system may further include a pitch controller 50.
  • the torque mode switch 30 of the wind turbine not only considers the rotational speed of the generator but also the pitch angle of the blade.
  • the pitch angle of the blade is maintained at the optimum constant pitch, the fine pitch angle, to produce the maximum output power.
  • the fine pitch angle is "0 degree".
  • the fine pitch angle is set to 0 degrees. Even if the average wind speed is above the rated speed, the actual wind speed is turbulent wind speed, so the rotational speed of the generator changes around the rated speed, so it may be smaller than the rated speed. Even in this situation, if the rotation speed is smaller than the rated speed and the pitch angle is larger than the fine pitch in order to improve the output power, the rated torque size is continuously maintained using the torque mode switch 30. This allows more power ratings to be maintained.
  • the pitch controller 50 operates above the rated wind speed.
  • the pitch controller 50 of the wind turbine generally uses a PI controller in the form of a speed control loop and pitch gain-scheduling, and the pitch controller 50 feeds back the rotational speed of the generator to generate a generator rated rotational speed (SpeedSet2) as a reference input. It is a method to control the pitch angle of the blade above the rated wind speed through the PI controller.
  • the concept of pitch gain-scheduling increases the natural frequency of the pitch controller 50 by increasing the absolute value of the nonlinear parameter of the aerodynamic torque with respect to the pitch angle as the wind speed increases, so that the wind speed is not used but fixed PI gain value. It is a method to reduce PI gain value by using gain factor to use small PI gain value as it increases.
  • FIG. 6 shows a block diagram of a pitch controller 50 according to an embodiment of the present invention.
  • the system configuration of the pitch controller 50 in the actual all wind speed section is represented by a block diagram as shown in FIG.
  • the pitch controller 50 feeds back the generator rotational speed ( ⁇ g ) and an error with the generator rated rotational speed ( ⁇ ref ) as a reference input ( Adjust the pitch command angle ⁇ c to minimize.
  • the pitch angle ⁇ is limited between the minimum and maximum values of the pitch angle through the pitch angle limiter 20 as shown in Equation 5 below.
  • ⁇ min is the minimum value of the pitch angle, and generally uses a fine pitch angle ( ⁇ fine ) value.
  • the fine pitch angle ( ⁇ fine ) is "0 degrees”. It is limited to fine pitch angle ( ⁇ fine ) to produce maximum output power below rated wind speed.
  • the maximum value of the pitch angle ⁇ max is the maximum value of the pitch angle and can be arbitrarily set according to the wind turbine.
  • the torque mode switch control method for maintaining the rated output power of the wind turbine according to an embodiment of the present invention as a whole first, the rated output power, the rated rotational speed, the fine pitch angle It will be set (S10).
  • the rotational speed measuring unit 10 measures the generator rotational speed in real time
  • the pitch controller 50 calculates the pitch command angle of the blade in real time
  • the pitch angle limiting unit 20 limits the pitch command angle To determine the pitch angle of the actual blade (S20).
  • the torque mode switch 30 selects a mode value based on the rotation speed measured by the rotation speed measurement unit 10 and the pitch angle determined by the pitch controller 50 and the pitch angle limiter unit 20. (S30).
  • the torque controller 40 is to control the torque of the generator according to the mode value selected by the torque mode switch 30 (S40).
  • the torque mode switch 30 selects the first mode value when it is determined that the wind energy is less than the rated output based on the rotational speed and the pitch angle, and selects the second mode value when it is determined that the wind energy is more than the rated output.
  • the torque controller 40 controls the generator torque with the torque value according to the calculated rotation speed in the case of the first mode value, and maintains the rated output power in the case of the second mode value.
  • the generator torque is controlled.
  • the torque mode switch control system for maintaining the rated output power may further include a pitch controller (50).
  • the torque mode switch 30 of the wind turbine not only considers the rotational speed of the generator but also the pitch angle of the blade.
  • the pitch angle of the blade is maintained at the optimum constant pitch, the fine pitch angle, to produce the maximum output power.
  • the fine pitch angle is "0 degree".
  • the fine pitch angle is set to 0 degrees. Even if the average wind speed is above the rated speed, the actual wind speed is turbulent wind speed, so the rotational speed of the generator changes around the rated speed, so it may be smaller than the rated speed. In this situation, in order to improve the output power, if the rotation speed is smaller than the rated speed and the pitch angle is larger than the fine pitch, the rated output power is continuously maintained using the torque mode switch 30. This allows more power ratings to be maintained.
  • the pitch controller 50 operates when the wind energy is higher than the rated output.
  • the pitch controller 50 of the wind turbine generally uses a PI controller in the form of a speed control loop and pitch gain-scheduling, and the pitch controller 50 feeds back the rotational speed of the generator to generate a generator rated rotational speed (SpeedSet2) as a reference input. It is a method to control the pitch angle of the blade above the rated wind speed through the PI controller.
  • the concept of pitch gain-scheduling increases the natural frequency of the pitch controller 50 by increasing the absolute value of the nonlinear parameter of the aerodynamic torque with respect to the pitch angle as the wind speed increases, so that the wind speed is not used but fixed PI gain value. It is a method to reduce PI gain value by using gain factor to use small PI gain value as it increases.
  • the system configuration of the pitch controller 50 in the actual all wind speed section is represented by a block diagram as shown in FIG. As shown in FIG. 6, Is the error between the generator rotational speed ( ⁇ g ) and the rated generator rotational speed ( ⁇ ref ) as the reference input.
  • the pitch controller 50 feeds back the generator rotational speed ( ⁇ g ) and an error with the generator rated rotational speed ( ⁇ ref ) as a reference input ( Adjust the pitch command angle ⁇ c to minimize.
  • the pitch angle ⁇ is limited between the minimum value and the maximum value of the pitch angle through the pitch angle limiter as shown in Equation 5 below.
  • ⁇ min is the minimum value of the pitch angle, and generally uses a fine pitch angle ( ⁇ fine ) value.
  • the fine pitch angle ( ⁇ fine ) is "0 degrees”. Wind energy is limited to fine pitch angle ( ⁇ fine ) to produce maximum output power below rated power.
  • the maximum value of the pitch angle ⁇ max is the maximum value of the pitch angle and can be arbitrarily set according to the wind turbine.
  • the torque mode switch control method for maintaining the rated torque according to the first embodiment of the present invention can be divided into four cases according to the rotational speed and the pitch angle of the generator. Four cases are as follows.
  • ⁇ g is the generator rotation speed
  • ⁇ grat is the generator rated rotation speed
  • ⁇ is the pitch angle of the blade
  • ⁇ fine is the fine pitch angle of the pitch angle
  • T g is the torque size of the generator
  • T grat is the rated torque size of the generator to be.
  • the torque of the generator uses a rated torque size.
  • the mode value of the torque mode switch 30 is “0”, a lookup table calculated in advance is used.
  • FIG. 7 is a block diagram showing a torque mode switch 30 and its control method for maintaining the rated torque of the wind turbine according to the first embodiment of the present invention.
  • 8 shows a block diagram of the torque mode switch 30 for maintaining the rated torque of the wind turbine according to the first embodiment of the present invention.
  • the value of the torque mode switch 30 is set to "1" so as to use the rated torque size of the generator.
  • the value of the torque mode switch 30 is set to "0" so as to generate a generator torque using a lookup table calculated in advance using the optimum mode gain.
  • This implementation means that if the generator rotational speed is greater than the rated rotational speed and the pitch angle is greater than the fine pitch angle, it is determined to be the rated wind speed or more, and the generator torque of the rated torque size is determined through the torque mode switch 30.
  • Generate The implementation of the "OR" statement is shown in Figure 8.
  • the torque mode switch control method for maintaining the rated torque of the wind turbine according to the first embodiment described above has a problem that torque chatter occurs in the torque size of the generator when the rated wind speed falls below the rated wind speed. have.
  • FIG. 9 shows a wind speed graph with respect to time indicating a step wind speed.
  • the rated wind speed of a 2MW wind turbine is about 12m / s (11.7m / s) and the generator's rated rotation speed is 1,500rpm.
  • a stair wind speed varying from 13 m / s to 11 m / s was used for the analysis of the case of rapidly falling below the rated wind speed above the rated wind speed of the wind turbine.
  • the results of the experiment are as shown in FIGS. 10 and 12.
  • V is the wind speed.
  • FIG. 10 shows the full range of blade pitch angles.
  • P g is the output power of the generator
  • T g is the torque magnitude of the generator
  • ⁇ g is the rotational speed of the generator
  • ⁇ is the pitch angle of the blade. 12 shows the full range of blade pitch angles.
  • the wind speed is 13m / s or more during the 0 to 5 seconds, so the rotational speed of the generator is 1,500rpm. At this time, to maintain the rated output, the aerodynamic torque generated from the blade should be reduced.
  • the aerodynamic torque decreases. If the wind speed is 13m / s, the steady state value of the pitch angle is maintained at about "6.5 degree” as shown in FIG. . At this time, the torque mode switch 30 corresponds to “case 1” and the torque size of the generator generates a rated torque size.
  • the torque mode switch 30 corresponds to “case 4” and the torque size of the generator adjusts the torque size of the generator according to the rotation speed of the generator.
  • the rotational speed of the generator changes, which causes transient response due to the dynamic characteristics of the wind turbine.
  • the generator's rotation speed is always below the rated rotation speed, so it does not matter whether the torque chatter occurs.
  • the blade pitch angle also causes transient response due to the dynamic characteristics of the pitch controller 50.
  • the pitch angle does not stop immediately at 6.27 seconds, which is a fine pitch angle of “0 degrees”, but several times around “0 degrees” after 6.27 seconds. After oscillation, it stays at "0 degree”. When oscillating around “0 degrees”, the pitch angle does not become smaller than the minimum value of the fine pitch angle “0 degrees” due to the pitch angle limiter, but it is slightly larger than “0 degrees” to affect the torque chatter. Get mad.
  • FIG. 10 shows that torque chattering occurs for about 1.5 seconds from the time when the wind speed suddenly changes from 13 m / s to 11 m / s and drops to the pitch angle “0 degree”. At this time, it can be seen that the pitch angle is maintained at "0 degree” after a very small vibration occurs several times between "0 ⁇ 0.02 degree” for about 1.5 seconds.
  • the control method of the torque mode switch 30 for maintaining the rated torque according to the second embodiment of the present invention described below is to solve the torque chattering problem shown in the first embodiment.
  • both information about the rotational speed of the generator and the pitch of the blade are considered.
  • the pitch angle is “0 degree”, which is a fine pitch angle due to the torque chatter caused by the dynamic characteristics of the pitch controller 50. There is a very small vibration that fluctuates around.
  • the control method of the torque mode switch 30 for maintaining the rated torque according to the second embodiment of the present invention proposed to solve the torque chattering problem is as follows. There are four cases depending on the speed and pitch angle of the generator.
  • Torque mode switch mode value (k) Torque mode switch mode value (k-1)
  • k is the current state and k-1 means the previous state.
  • the transient response for 5 ⁇ 6.27 seconds after the wind speed is changed to 11m / s shows that the generator's rotational speed is smaller than the rated rotational speed but the pitch angle is larger than the fine pitch angle. Since this corresponds to "case 3", the value of the torque mode switch 30 should be determined between "1" and "0".
  • the pitch angle drops to “0 degrees,” the fine pitch angle.
  • the rotation speed of the generator is smaller than the rated rotation speed and the pitch angle is the fine pitch angle, it corresponds to “case 4” and the value of the torque mode switch 30 changes to “0”.
  • the pitch angle becomes larger than the fine pitch angle because of the dynamic characteristics of the pitch controller 50.
  • the value of the torque mode switch 30 should be determined from “1" and "0". In this case, since the "previous value” of the torque mode switch 30 is "0", it is determined as “0” and is maintained as “0” without changing to "1". At this time, the torque magnitude of the generator does not change rapidly to the rated torque magnitude, thereby preventing torque chattering.
  • the method of controlling the torque mode switch 30 for maintaining the rated torque according to the second embodiment of the present invention is implemented in Matlab / Simulink as shown in FIG. 16. This is one of several implementations and is implemented using logic circuit “AND” and integer delay z ⁇ 1 . Where z -1 means "old value”.
  • the torque mode switch 30 if the rotation speed of the generator is equal to or higher than the rated speed, the torque mode switch 30 is determined to be equal to or greater than the rated output. If the rotational speed of the generator is smaller than the rated speed and the pitch angle is a fine pitch angle, the value of the torque mode switch 30 is determined to be "0" or less. In addition, if the rotational speed of the generator is smaller than the rated speed and the pitch angle is larger than the fine pitch angle, the value of the torque mode switch 30 becomes the "previous value" using the integer delay function.
  • the turbulent wind velocity as shown in FIG. 17 was used to identify a problem of torque chattering caused when the wind speed drops rapidly above the rated wind velocity to below the rated wind velocity.
  • the turbulent wind velocity used was generated according to IEC-61400-1. The average wind velocity for 10 minutes was 16 m / s and the turbulence intensity was 17.6%.
  • the actual turbulent wind speed is very large and the turbulence intensity is so large that the case of falling below the rated wind speed more than the rated wind speed (about 12 m / s) occurs several times, so the correct operation of the torque mode switch 30 is important. .
  • the average output power is 1.97 MW
  • the control method of the torque mode switch 30 for maintaining the rated torque according to the second embodiment is also equal to 1.97MW. Therefore, if the control method of the torque mode switch 30 according to the second embodiment is used in the actual turbulent wind speed, the same output power can be obtained while preventing the occurrence of torque chatter, which is a problem of the torque mode switch control method according to the first embodiment. It can be seen that there is an advantage.
  • the torque mode switch control method for maintaining the rated torque according to the second embodiment of the present invention, as mentioned above, the problem of torque chatter caused when the wind turbine falls sharply below the rated wind speed above the rated wind speed It is possible to completely solve the problem, and also to control the torque level of the generator stably.
  • Torque mode switch control method for maintaining the rated output power of the wind turbine according to the first embodiment of the present invention can be divided into four cases according to the rotational speed and pitch angle of the generator. Four cases are as follows.
  • Torque mode switch mode value '1' ( )
  • Torque mode switch mode value '1' ( )
  • Torque mode switch mode value '1' ( )
  • ⁇ g is generator rotation speed
  • ⁇ grat is generator rated rotation speed
  • ⁇ is pitch angle of blade
  • ⁇ fine is fine pitch angle of pitch angle
  • T g is torque size of generator
  • P grat is rated output power of generator to be.
  • the torque size of the generator is produced by maintaining the rated output power of the generator.
  • the mode value of the torque mode switch 30 is “0”, a lookup table calculated in advance is used.
  • FIG. 25 is a block diagram illustrating a torque mode switch and a control method for maintaining a rated output power of a wind turbine according to a first embodiment of the present invention.
  • FIG. 26 shows a block diagram of the torque mode switch 30 for maintaining the rated output power of the wind turbine according to the first embodiment of the present invention.
  • the value of the torque mode switch 30 is set to "1" to maintain the rated output power of the generator.
  • the value of the torque mode switch 30 is set to "0" to generate a generator torque using a lookup table calculated in advance using the optimum mode gain.
  • This implementation means that if the rotation speed of the generator is greater than the rated rotation speed and the pitch angle is greater than the fine pitch angle, it is determined that the wind energy is greater than the rated output, and the torque mode switch 30 Generate generator torque
  • the implementation of the “OR” statement is shown in FIG. 26.
  • torque chattering occurs in the torque size of the generator when the wind energy falls below the rated output when the wind energy is above the rated output. I have a problem.
  • FIG. 27 shows a wind speed graph with respect to time indicating a step wind speed.
  • the wind energy of the 2MW wind turbine is rated at about 12m / s (11.7m / s) and the rated rotation speed of the generator is 1,500rpm.
  • a stair wind speed varying from 13 m / s to 11 m / s was used for the analysis of the case where the wind energy of the wind turbine suddenly falls below the rated output from the rated output.
  • the results of the experiment are as shown in FIGS. 28 and 30.
  • V is the wind speed.
  • the wind energy describes the steady state above the rated power
  • the wind speed is 13m / s or more during 0 ⁇ 5 seconds, so the rotation speed of the generator is 1,500rpm.
  • the aerodynamic torque generated from the blade should be reduced.
  • the torque mode switch 30 corresponds to “case 1” and generates a torque size of the generator by maintaining the rated output power.
  • the wind speed is 11m / s for 7.51 ⁇ 15 seconds and the wind energy is below the rated power, so the rotation speed of the generator is 1,494rpm less than the rated speed. Since the wind energy falls below the rated power, the pitch angle is maintained after falling to the fine pitch angle of “0 degrees” to obtain more aerodynamic torque.
  • the torque mode switch 30 corresponds to “case 4” and the torque size of the generator adjusts the torque size of the generator according to the rotation speed of the generator.
  • the rotational speed of the generator will change. Therefore, transient response occurs due to the dynamic characteristics of the wind turbine. However, if the wind energy is below the rated power, the generator's rotational speed is always below the rated rotational speed.
  • the blade pitch angle also causes transient response due to the dynamic characteristics of the pitch controller 50.
  • the pitch angle does not stop immediately at 6.2 seconds, which is a fine pitch angle of "0 degrees”, but several times around "0 degrees” after 6.2 seconds. After oscillation, it stays at "0 degree”. When oscillating around “0 degrees”, the pitch angle does not become smaller than the minimum value of the fine pitch angle “0 degrees” due to the pitch angle limiter, but it is slightly larger than “0 degrees” to affect the torque chatter. Get mad.
  • the torque mode switch 30 is changed from “case 1” to “case 4” when the wind energy suddenly drops from above the rated output to below the rated output, and then the state of “case 4” is not continuously maintained. If the pitch angle is larger than the fine pitch angle of "0 degree", it will change to "case 3" and then change to "case 4". At this time, in case 3, the rated output power is maintained, and in case 4, the torque size of the generator is adjusted according to the rotational speed of the generator. In case 3 and case 4 are repeated in a short time, the torque size Rapidly changes, causing chattering.
  • FIG. 28 shows that torque chattering occurs for about 1.3 seconds from the time when the wind speed suddenly changes from 13 m / s to 11 m / s and falls to the pitch angle “0 degree”. At this time, it can be seen that the pitch angle is maintained at "0 degree” after several very small vibrations occur between "0 ⁇ 0.02 degree” for about 1.3 seconds.
  • the torque mode switch control method for maintaining the rated output power of the wind turbine according to the second embodiment of the present invention described below is to solve the torque chattering problem shown in the first embodiment.
  • both information about the rotational speed of the generator and the pitch angle of the blade are considered.
  • the pitch angle is a fine pitch angle "0" due to torque chattering caused by the dynamic characteristics of the pitch controller 50 when the wind energy drops rapidly from the rated output to the rated output. Very small vibrations are fluctuating around the figure.
  • Torque mode switch control method for maintaining the rated output power of the wind turbine according to the second embodiment of the present invention proposed to solve the torque chattering problem is as follows. There are four cases depending on the speed and pitch angle of the generator.
  • Torque mode switch mode value '1' ( )
  • Torque mode switch mode value '1' ( )
  • Torque mode switch mode value (k) Torque mode switch mode value (k-1)
  • k is the current state and k-1 means the previous state.
  • the wind energy describes the steady state under the rated power
  • the wind speed is 11m / s and the wind energy is below the rated power for 11.21 ⁇ 15 seconds, so the rotation speed of the generator is 1,494rpm, which is smaller than the rated speed and the pitch angle is “0. Degrees ”are fine pitch angles. This corresponds to "case 4" and the value of the torque mode switch 30 is maintained at "0". This is the same as the result of the first embodiment.
  • the transient response for 5 ⁇ 6.2 seconds after the wind speed is changed to 11m / s shows that the rotational speed of the generator is smaller than the rated rotational speed but the pitch angle is larger than the fine pitch angle. Since this corresponds to "case 3", the value of the torque mode switch 30 should be determined between "1" and "0".
  • the pitch angle drops to a fine pitch of zero degrees.
  • the rotation speed of the generator is smaller than the rated rotation speed and the pitch angle is the fine pitch angle, it corresponds to “case 4” and the value of the torque mode switch 30 changes to “0”.
  • the pitch angle becomes larger than the fine pitch angle because of the dynamic characteristics of the pitch controller 50.
  • the value of the torque mode switch 30 should be determined from “1" and "0". In this case, since the "previous value” of the torque mode switch 30 is "0", it is determined as “0” and is maintained as “0” without changing to "1". At this time, the torque magnitude of the generator does not change rapidly with the rated output power, thereby preventing torque chattering.
  • the torque mode switch 30 if the rotation speed of the generator is equal to or higher than the rated speed, the torque mode switch 30 is determined to be equal to or greater than the rated output. If the rotational speed of the generator is smaller than the rated speed and the pitch angle is a fine pitch angle, the value of the torque mode switch 30 is determined to be "0" or less. In addition, if the rotational speed of the generator is smaller than the rated speed and the pitch angle is larger than the fine pitch angle, the value of the torque mode switch 30 becomes the "previous value" using the integer delay function.
  • the turbulent wind velocity as shown in FIG. 35 was used to identify the problem of torque chattering that occurs when wind energy drops rapidly above the rated output to below the rated output.
  • the turbulent wind velocity used was generated according to IEC-61400-1. The average wind velocity for 10 minutes was 16 m / s and the turbulence intensity was 17.6%.
  • the actual turbulent wind velocity is very large and the turbulence intensity is so large that the case of falling below the rated wind velocity over the rated wind velocity (about 12 m / s) occurs several times, so the correct operation of the torque mode switch 30 is important. .
  • the average output power is 1.97 MW
  • the torque mode switch control for maintaining the rated output power of the wind turbine according to the second embodiment The average output power of the method is also equal to 1.97 MW. Therefore, when the torque mode switch control method for maintaining the rated output power of the wind turbine according to the second embodiment at the actual turbulent wind speed is a problem of the torque mode switch control method for maintaining the rated output power of the wind turbine according to the first embodiment. It can be seen that there is an advantage that the same output power can be obtained while preventing the occurrence of in torque chattering.
  • the torque mode switch control method for maintaining the rated output power of the wind turbine according to the second embodiment of the present invention, as mentioned above, the torque generated when the wind turbine rapidly falls below the rated wind speed above the rated wind speed The problem of chattering can be completely solved, and the torque magnitude of the generator can be controlled while maintaining a stable rated output power.
  • the above-described apparatus and method may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be selectively combined in whole or in part in each of the embodiments so that various modifications may be made. It may be configured.

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  • Life Sciences & Earth Sciences (AREA)
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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
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Abstract

La présente invention concerne un système de commande de commutation de mode de couple permettant de maintenir une sortie nominale d'une éolienne et, plus particulièrement, concerne un système et un procédé de commande de commutation de mode de couple destinés à une éolienne, le système comprenant : une unité de mesure de vitesse de rotation destinée à mesurer la vitesse de rotation d'un générateur en temps réel ; un dispositif de commande de pas destiné à calculer l'angle de pas commandé d'une pale en temps réel ; une unité de dispositif de limitation d'angle de pas destiné à déterminer l'angle de pas effectif de la pale par limitation de l'angle de pas commandé ; un commutateur de mode de couple destiné à sélectionner une valeur de mode sur la base de la vitesse de rotation mesurée par l'unité de mesure de vitesse de rotation et de l'angle de pas déterminé par le dispositif de commande de pas et l'unité de dispositif de limitation d'angle de pas ; et un dispositif de commande de couple destiné à commander le couple du générateur en fonction de la valeur de mode sélectionnée par le commutateur de mode de couple, de façon à permettre à un problème de broutement, qui est provoqué par le commutateur de mode couple lorsqu'une vitesse du vent diminue brutalement à partir d'un niveau supérieur ou égal à une vitesse du vent nominale jusqu'à un niveau inférieur ou égal à la vitesse du vent nominale dans la commande du couple de la turbine éolienne, d'être évité, et à permettre au dispositif de commande de couple de fonctionner de manière stable.
PCT/KR2017/001044 2016-02-04 2017-02-01 Procédé de commande de commutation de mode de couple destiné à maintenir une sortie nominale de turbine éolienne et système correspondant WO2017135657A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0013943 2016-02-04
KR1020160013943A KR101716073B1 (ko) 2016-02-04 2016-02-04 풍력터빈의 토크모드스위치 제어방법 및 그 시스템
KR1020160013944A KR101716074B1 (ko) 2016-02-04 2016-02-04 정격출력 유지를 위한 풍력터빈의 출력제어방법 및 그 시스템
KR10-2016-0013944 2016-02-04

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CN111262256A (zh) * 2018-11-30 2020-06-09 北京金风科创风电设备有限公司 风力发电机组的一次调频的控制方法及设备
CN112943528A (zh) * 2019-11-26 2021-06-11 新疆金风科技股份有限公司 风力发电机组的控制方法和装置

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KR20110028256A (ko) * 2008-10-16 2011-03-17 미츠비시 쥬고교 가부시키가이샤 풍력 발전 시스템 및 그 제어 방법
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Publication number Priority date Publication date Assignee Title
CN111262256A (zh) * 2018-11-30 2020-06-09 北京金风科创风电设备有限公司 风力发电机组的一次调频的控制方法及设备
CN112943528A (zh) * 2019-11-26 2021-06-11 新疆金风科技股份有限公司 风力发电机组的控制方法和装置

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