WO2016010290A1 - 풍력발전기의 적응형 관성 제어 방법 - Google Patents
풍력발전기의 적응형 관성 제어 방법 Download PDFInfo
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- WO2016010290A1 WO2016010290A1 PCT/KR2015/006921 KR2015006921W WO2016010290A1 WO 2016010290 A1 WO2016010290 A1 WO 2016010290A1 KR 2015006921 W KR2015006921 W KR 2015006921W WO 2016010290 A1 WO2016010290 A1 WO 2016010290A1
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- output
- wind
- wind turbine
- speed
- rotor speed
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000003044 adaptive effect Effects 0.000 title description 8
- 230000007423 decrease Effects 0.000 claims description 21
- 230000000694 effects Effects 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F5/00—Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
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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
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
- F03D7/0284—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to the state of the electric grid
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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
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- 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
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
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- 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
-
- 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
- Y02E10/76—Power conversion electric or electronic aspects
Definitions
- the present invention relates to a method for controlling the output of a wind turbine. More specifically, the present invention relates to an output control method for temporarily decreasing the output frequency of a wind power generator to reduce a drop in system frequency when disturbance occurs in the system.
- Variable speed wind turbines such as the Doubly Fed Induction Generator (DFIG) typically perform maximum power point tracking (MPPT) to maximize power production.
- MPPT maximum power point tracking
- the output does not correspond to the grid frequency so that the wind farm does not show an inertial response.
- a rate of change of frequency (ROCOF) loop is added to the active power controller of the DFIG converter so that the wind turbine generates active power proportional to the ROCOF when the frequency decreases.
- ROCOF rate of change of frequency
- a frequency change loop is added to the frequency change rate loop, so that the wind turbine generates additional active power proportional to the frequency change when the frequency drops. According to this method, the contribution to the frequency control can be increased.
- the stepped output inertia control method that produces 10 seconds by adding a value corresponding to 0.1p.u. of the rated power to the active power output at the time of the frequency drop. After 10 seconds, in order to recover the decreased rotor speed again, the active power which is smaller by 0.05 p.u. of the rating than the output at the time of the frequency drop was continuously output for 20 seconds. However, in the process of restoring the rotor speed, the momentarily decreasing output caused a secondary frequency drop in the system.
- the conventional stepped output inertia control scheme sharply reduces the output to prevent excessive deceleration of the generator after increasing the output. This can be another disturbance to the system, causing a second frequency drop.
- the decrease in output caused by interruption of inertia control due to excessive deceleration of the wind turbine can cause a larger secondary frequency drop, which adversely affects the frequency stability of the system.
- the kinetic energy of each wind generator which is changed by the wake effect in the wind farm, cannot be reflected in the inertial control.
- the present invention is to solve the above-described problems of the prior art, and aims to minimize the system frequency drop while preventing an over-deceleration phenomenon of the wind turbine when a system accident occurs.
- the output increase step may calculate the output increase amount by using a mechanical input and an electrical output curve at a corresponding wind speed of the wind turbine.
- the output increase step may increase the output reference value for maximum power point tracking by adding an output increase amount calculated in proportion to the generator rotor speed at the time of the accident.
- the output increase step of each wind generator in proportion to the kinetic energy stored in the rotor of each wind generator at the time of the accident The output can be increased, where kinetic energy can be proportional to the input wind speed of each wind turbine with the wake effect reflected.
- the output increase amount when the wind speed decreases or increases during the inertial control, the output increase amount can be decreased or increased respectively.
- the output increasing step may increase the output by reflecting the limit control range of the rotor speed of the wind turbine, and more specifically, the mechanical input curve of the wind turbine and the output curve during inertia control according to each input wind speed. It can be determined by a constant value to meet at a point. However, when the intersection point defined above is formed at the rotor speed of ⁇ min or less, the output increase amount may be determined by setting the intersection point of the two curves to a maximum constant value such that the rotor speed is at a predetermined point.
- the output increase amount may be determined by multiplying a value set in proportion to the kinetic energy by a weight proportional to the maximum rate of change of the system frequency at the time of the accident.
- the present invention it is possible to minimize the frequency drop while preventing the over-deceleration of the wind turbine in the event of a grid accident, the second frequency drop of the grid caused by the reduction of the output of the wind turbine during inertial control Can be prevented.
- FIG. 1 illustrates an exemplary model of a wind farm and a system for simulating an adaptive inertial control method of a wind turbine according to an embodiment of the present invention.
- FIG. 5 is a graph showing the operation characteristics of the adaptive inertial control of the wind power generator in an embodiment of the present invention.
- FIG. 6 is a graph showing the operation characteristics of the adaptive inertial control of the wind power generator in another embodiment of the present invention.
- the wind turbine adaptive inertial control method of the present invention increases the output of the wind turbine in proportion to the rotor speed at the time of the accident, unlike the conventional method mentioned in [Background Art of the Invention].
- the method mentioned in [Technology Background of the Invention] is that if an accident occurs in a wind turbine and the frequency decreases, a specific value (0.1pu) is output at the time of the accident (the frequency drop time). ) Increase the active power and maintain it for a certain time (eg 10 seconds). After a certain time, the active power is reduced by a certain value (0.05p.u.) and maintained for a certain time (eg, 20 seconds).
- the conventional method responds to a wind turbine accident by maintaining a certain amount of active power for a certain time irrespective of the state of the generator.
- the system accident referred to in the present invention refers to a case in which a sudden increase in load or a synchronous generator in operation is dropped due to a decrease in frequency due to insufficient active power in the power system.
- the present invention increases the output of the wind turbine in proportion to the generator rotor speed at the time of the accident, in other words, the frequency drop time.
- the output of the wind power generator is determined in proportion to the cube of the rotor speed below the rated wind speed (in the wind speed range in which the wind power generator can operate) and the generator rotor speed is proportional to the wind speed.
- the wind power generator generator having a large amount of kinetic energy
- the control to emit more output (kinetic energy) when the accident occurs. This is different from the conventional method (output continuously plus a predetermined constant value for a certain time), and coping with an accident (disturbance) in consideration of the operating state of the wind turbine (rotator speed at the time of the accident).
- the output reference value for maximum power point tracking control is calculated in proportion to the generator rotor speed at the time of the accident. You can increase the generator output by adding more output.
- Equation 1 The present embodiment is expressed by the following Equation 1 below.
- P MPPT is the output of the wind power generator according to the maximum output tracking control
- ⁇ P is the output of the wind power generator to increase in the event of an accident and has a constant value.
- ⁇ P is proportional to the generator rotor speed at the time of the accident.
- Pref is the wind turbine output after the time of the accident occurs according to the output control method of the present invention.
- the wind power generator is controlled to maintain a predetermined specific output for a predetermined time instead of the maximum output tracking control.
- the output reference value for the maximum output tracking control is performed immediately before an accident. By adding an increase in output proportional to the electronic speed, the output can be increased immediately after an accident, and the second frequency drop can also be prevented.
- the output in increasing the output of the wind turbine in proportion to the kinetic energy, the output may be increased by reflecting the limit control range of the rotor speed of the wind turbine.
- the active power added in proportion to the kinetic energy is determined as an output value that the wind turbine can maximize to within the range (limit control range) in which the rotor speed does not decelerate below the limit speed during inertia control. That is, in the case of a wind turbine having a high kinetic energy due to the high rotor speed, an additional effective power is largely calculated. On the contrary, a wind generator having a small kinetic energy due to a low rotor speed is estimated to have a small additional effective power.
- Equation 2 is as follows.
- Equation 2 Pmech is a mechanical input of the wind turbine. Specific equations may vary depending on the characteristics of the Pmech or how the wind turbine is defined. Meanwhile, the form of Equation 2 may vary depending on whether damping is considered.
- P MPPT of [Equation 1] can be expressed by k ⁇ 3 (k value of the coefficient can vary according to the control mode of the wind power generator, P MPPT is expressed in the form of a form proportional to the cube of ⁇ ) In this case, it should be regarded as having the same mathematical meaning as P MPPT of Equation 1). Therefore, the above [Equation 1], [Equation 2] can be expressed by the following [Equation 3], and based on this ⁇ P is derived as shown in [Equation 4].
- the output that is increased for inertia control reflects the limit control range of the rotor speed of the wind turbine so that the sum of the difference between the mechanical input and the output is zero. Can be computed as possible.
- FIG. 5 is a curve representing the mechanical input of the wind power generator and the lower one of the two red solid lines is the output according to the maximum output tracking control, and the above curve reflects the increased output according to an embodiment of the present invention. It is a curve.
- the present invention controls the wind turbine so that the sum of the difference between the mechanical input and the output according to the inertia control is 0 in the interval of ⁇ min to ⁇ * (Expressed by Equation 2).
- ⁇ P for inertia control is calculated by setting ⁇ min and ⁇ * as the minimum operating speed and the optimum operating speed, respectively, but ⁇ P can be calculated even when using different values for ⁇ min and ⁇ *. That is, even if the rotor speed is not ⁇ * because the wind turbine is not operated in the MPPT control mode, the current rotor speed can be obtained by substituting the current rotor speed in place of ⁇ * in [Equation 4].
- ⁇ P may be calculated through the characteristic curve of FIG. 6, unlike the method according to Equation 4.
- ⁇ P according to [Equation 4] is determined as the point where the deceleration area and the acceleration area are equal to each other in FIG. 5 (the point at which the total difference between the input curve and the output curve is 0), while the characteristic curve of FIG. If the wind speed decreases or increases during inertial control, ⁇ P is calculated to increase or decrease in proportion to the wind speed, so that the mechanical input curve and the electrical output curve meet at one point at the wind speed. It is the point where the rotor speed converges to the point where the difference between the mechanical input and the electrical output becomes zero, and it means the point where d ⁇ r / dt gradually decreases and then converges to zero.
- the present embodiment is expressed by the following equation.
- Equation 5 Equation 5 below.
- n represents a degree reflecting the kinetic energy that can be emitted when generating the output function
- n is a rational number having no value of 0 or less
- m is an integer of 0 or more
- ⁇ is the maximum rate of change of the system frequency It means a weight reflecting a value proportional to and the coefficient k value may vary according to the control mode of the wind turbine.
- the output in increasing the output of the wind turbine in proportion to the kinetic energy, the output may be increased by reflecting the limit control range of the rotor speed of the wind turbine.
- the output increase amount obtained in proportion to the kinetic energy is multiplied by a value proportional to the maximum change rate of the system frequency by a weight, and the output may be increased by reflecting the limit control range of the rotor speed of the wind turbine.
- ⁇ P is calculated by considering the mechanical input curve and the electrical output curve (generally MPPT control curve) determined by the input wind speed of the wind turbine. More specifically, ⁇ P to calculate the mechanical input curve and the electrical output curve of the wind turbine drawn in the active power-rotor speed plane of the generator at one point, and will be described in detail with reference to FIG.
- ⁇ P calculated in the present invention is a constant, it serves to increase the MPPT control reference value vertically during inertia control, and the output curve thus determined is a purple solid line.
- the present invention determines ⁇ P to meet the mechanical input curve (blue solid line) and the electrical output curve (purple solid line) of the wind turbine at one point.
- the two curves meet at one point indicates the point where the rotor speed of the wind turbine no longer decreases due to inertia control, so that over-deceleration due to inertia control can be avoided when the present invention is applied.
- the output curve (purple solid line) in the inertial control of the present invention smoothly reduces the output while the rate of change (dP / dt) of the output decreases as the rotor speed decreases due to the release of the kinetic energy.
- inertia control can be performed after the disturbance without causing the secondary frequency drop. Therefore, the present invention can calculate the amount of output increase for inertia control within the range that the rotor speed of the wind turbine does not reach the limit speed through the output curve and the mechanical input curve of the wind turbine.
- the input and output curves are convex and convex, respectively, they have two intersections when ⁇ P is not maximum. If the intersection of the two curves is formed at the point where the rotor speed is ⁇ min or less (the input wind speed is small), decrease ⁇ P. At this time, ⁇ P is set to a maximum value of ⁇ P, which is the intersection of the two curves to be formed in the ⁇ min or set point, that is, ⁇ min or more points according to the control limit of the wind turbine. That is, the wind power generator can be converged at ⁇ min when the present invention is applied, and can prevent the frequency drop while avoiding excessive deceleration caused by inertial control even at low wind speed, thereby preventing the second frequency drop.
- ⁇ P can be estimated in advance for each optimum rotor speed. This value is proportional to the input wind speed (or ⁇ *) coming into the wind turbine. In other words, when the rotor kinetic energy of the wind generator is large, ⁇ P is largely calculated to increase the contribution, and when the rotor kinetic energy is small, ⁇ P is small.
- ⁇ P for inertial control is calculated assuming that the output of the wind turbine is operated in the MPPT control mode before a system accident occurs, but if the wind generator is not operated in the MPPT control mode, the corresponding electrical output ⁇ P can be obtained by substituting the function in P MPPT of FIG. 6.
- the amount of output increase can be calculated so that the mechanical input curve and the electrical output curve meet at one point, provided that the point has an intersection point at or below the minimum speed limit if the point is formed below the minimum speed limit.
- the maximum value is calculated.
- Figure 1 shows an exemplary model of the wind farm and grid for simulating the adaptive inertial control method of the wind turbine according to an embodiment of the present invention.
- the system shown in FIG. 1 consists of a wind farm consisting of six synchronous generators using an energy governor and 20 units of 5MW DFIG, an inductor consuming 240MW and a fixed load consuming 360MW. It is equivalent to one wind farm DFIG, which is connected to the system via two 60 MVA main transformers and submarine cables.
- the starting, rated and end wind speeds of the DFIG are 4 m / s, 11 m / s and 25 m / s, respectively, and the rotor speed limit range of the wind turbine is 0.7-1.25 p.u.
- FIG. 2 to 4 show a case of 16.7% wind capacity acceptance rate.
- Figure 2 compares the scheme of adaptive inertia control and prior art document 3 in the case of wind speed 11m / s.
- the prior art document 3 can be seen that the frequency drop is severe compared to the present invention.
- the prior art document 3 shows a second frequency drop phenomenon (52 seconds).
- the present invention shows a stable frequency recovery without the secondary frequency drop phenomenon after the lowest frequency (43 seconds).
- the method of the prior art document 3 has an output increase interval for 10 seconds from the time of the accident (40 seconds), the output decrease interval for 20 seconds after the output increase interval Has A sudden drop in output (0.15p.u.) between the two sections results in a second frequency drop.
- ⁇ P is largely calculated according to the high rotor kinetic energy so that the output reference value is output as the output torque limit value beyond the torque limit of the wind turbine. After the rapid increase in power in the present invention, as the rotor speed decreases, the output of the wind power generator is gently reduced to prevent the secondary frequency drop phenomenon shown in the prior art document.
- the prior art document 3 increases the rotor speed again to prevent over-deceleration after the rotor speed decrease.
- the rotor speed converges to the intersection of the mechanical input curve and the electrical output curve of the wind turbine, and this point is higher than the minimum limit rotor speed, thereby preventing the over-deceleration phenomenon.
- FIG. 3 compares the scheme of adaptive inertia control with the prior art document in the case of a wind speed of 9 m / s.
- the frequency of the present invention decreases less than that of the prior art document 3 as in FIG. 2.
- a second frequency drop phenomenon 54 seconds occurs as shown in FIG.
- the frequency is stably recovered without a secondary frequency drop.
- the prior art document 3 shows the same output characteristics as in the case of Figure 2 has a sudden power decrease after 10 seconds after the system accident caused a secondary frequency drop phenomenon This happens.
- a predetermined ⁇ P is added for 9m / s wind speed to increase the output drastically and contribute to the increase of the system frequency lowest point after the accident.
- a slowly decreasing output following MPPT control after an increase in output does not cause a second frequency drop.
- the rotor speed converges to a predetermined point and prevents over-deceleration.
- Figure 4 compares the method of the present invention and the prior art document 3 at a wind speed of 7m / s.
- Wind turbines have low kinetic energy because of the low input wind speed.
- the prior art document 3 has a large output increase regardless of the low kinetic energy of the wind generator. Therefore, the over-deceleration phenomenon occurs during inertia control and stops the inertia control and converts the output to MPPT control (47 seconds), and has a very large output reduction phenomenon.
- ⁇ P of the present invention calculated at the optimum rotor speed corresponding to 7 m / s has a smaller value than the method of the prior art document 3.
- the prior art document 3 contributes to the increase of the lowest frequency after the accident, but generates a secondary frequency drop phenomenon.
- the rotor speed characteristics of the generator are not taken into account. Therefore, over-deceleration occurs easily, and the second frequency drop that is more severe than the first frequency drop occurs, which is very fatal to the system.
- the additional active power may be calculated in consideration of the rotor speed of the generator to prevent the over-deceleration phenomenon and stably contribute to the frequency peak rise and frequency recovery, and the secondary frequency drop may be prevented.
- the present invention it is possible to minimize the frequency drop while preventing the over-deceleration of the wind turbine in the event of a grid accident, the second frequency drop of the grid caused by the reduction of the output of the wind turbine during inertial control Since it can be prevented, there is industrial applicability.
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Abstract
Description
Claims (9)
- 풍력발전기를 제어하는 방법에 있어서, 사고 발생 시, 풍력발전기의 출력을 사고 발생 시점에 풍력발전기에 저장된 운동에너지에 비례하는 유효 전력 값을 더하여 증가시키는 출력 증가 단계; 를 포함하고상기 출력 증가 단계는 풍력발전기의 해당 풍속에서 기계적입력과 전기적출력곡선을 이용하여 출력증가량을 산출하는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 1에 있어서,상기 출력 증가 단계는 최대 출력 추종 제어(Maximum Power Point Tracking)를 위한 출력 기준값에 산정된 출력 증가량을 더하여 발전기 출력을 증가시키는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 1에 있어서,복수의 풍력발전기를 포함하는 풍력발전단지를 제어하는 경우, 상기 출력 증가 단계는 사고 발생 시점의 각 풍력발전기의 개별 풍속에 비례하여 각 풍력발전기의 출력을 증가시키는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 3에 있어서,상기 개별 풍속은 풍력발전기의 후류 효과(wake effect)가 반영된 것임을 특징으로 하는 풍력발전기의 출력 제어 방법
- 청구항 1에 있어서,상기 출력 증가 단계는 풍력발전기 회전자 속도의 한계 제어 범위를 반영하여 출력을 증가시키는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 1에 있어서,상기 출력 증가 단계는 관성제어를 수행하는 동안 풍속이 감소하거나 증가할 때, 출력 증가량을 각각 감소시키거나 증가시키는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 1에 있어서,상기 출력 증가량은 각 입력 풍속에 따라 풍력발전기의 기계적 입력 곡선과 관성제어 시의 출력 곡선이 적어도 한 점에서 만나도록 하는 상수, 단, 앞에서 정한 교점이 회전자 속도가 ωmin 이하에서 형성될 경우에는 두 곡선의 교점이 회전자 속도가 기 설정된 지점에 오도록 하는 최대 상수값으로 정해지는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
- 청구항 7에 있어서,상기 출력 증가량은 사고 발생 시점에서, 운동에너지에 비례하여 설정한 값에, 계통 주파수의 최대 변화율에 비례하는 가중치를 곱하여 결정하는 것을 특징으로 하는 풍력발전기의 출력 제어 방법.
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US14/893,815 US20170115685A1 (en) | 2014-07-15 | 2015-07-06 | Adaptaive inertial control method of wind generator |
JP2015563119A JP6007343B2 (ja) | 2014-07-15 | 2015-07-06 | 風力発電機の出力制御方法 |
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KR1020150094058A KR101564978B1 (ko) | 2014-07-15 | 2015-07-01 | 풍력발전기의 적응형 관성 제어 방법 |
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CN105703396A (zh) * | 2016-03-21 | 2016-06-22 | 广西电网有限责任公司电力科学研究院 | 一种双馈风力发电场多机表征等值建模方法 |
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EP3096004A1 (en) * | 2015-05-18 | 2016-11-23 | ABB Technology AG | Wind farm inertial response |
CN110912186B (zh) * | 2019-11-27 | 2021-04-06 | 国网冀北电力有限公司电力科学研究院 | 双馈型风力发电虚拟同步发电机建模方法 |
CN112784509B (zh) * | 2021-03-04 | 2024-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | 基于改进高斯分布尾流模型的风力发电机功率计算方法 |
KR102439311B1 (ko) * | 2021-05-10 | 2022-09-01 | 군산대학교산학협력단 | 희소화된 웨이크 방향 그래프를 이용한 풍력 발전 단지의 조정 최적화 방법 및 이를 수행하는 장치 |
CN113394827A (zh) * | 2021-07-12 | 2021-09-14 | 南通大学 | 一种适用于高风电渗透水平的风电调频控制方法 |
CN114268129B (zh) * | 2021-12-21 | 2024-02-02 | 湖州越球电机有限公司 | 一种基于深度神经网络的风电调频逐步惯性控制方法 |
WO2024091246A1 (en) * | 2022-10-28 | 2024-05-02 | General Electric Renovables España, S.L. | System and method for providing speed dependent grid frequency support in grid-forming inverter-based resources |
CN116191477B (zh) * | 2023-04-23 | 2023-09-12 | 国网江西省电力有限公司电力科学研究院 | 一种新能源惯量支撑方法、***及电子设备 |
KR102590813B1 (ko) * | 2023-05-19 | 2023-10-19 | 제주대학교 산학협력단 | 풍력 발전기 및 그의 동작 방법 |
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- 2015-07-06 WO PCT/KR2015/006921 patent/WO2016010290A1/ko active Application Filing
- 2015-07-06 JP JP2015563119A patent/JP6007343B2/ja not_active Expired - Fee Related
- 2015-07-06 US US14/893,815 patent/US20170115685A1/en not_active Abandoned
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JP2010025028A (ja) * | 2008-07-22 | 2010-02-04 | Univ Of Ryukyus | 風力発電機の出力電力変動抑制装置 |
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KR101564978B1 (ko) | 2015-11-02 |
US20170115685A1 (en) | 2017-04-27 |
JP2016528857A (ja) | 2016-09-15 |
JP6007343B2 (ja) | 2016-10-12 |
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