CN103174587B - Wind power generation system and control method thereof - Google Patents
Wind power generation system and control method thereof Download PDFInfo
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- CN103174587B CN103174587B CN201110441807.5A CN201110441807A CN103174587B CN 103174587 B CN103174587 B CN 103174587B CN 201110441807 A CN201110441807 A CN 201110441807A CN 103174587 B CN103174587 B CN 103174587B
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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
Abstract
The invention discloses a wind power generation system and a control method of the wind power generation system. The control method includes the following steps: firstly, starting a control unit to determine an operation mode of a wind power generator, then setting the wind power generator in a normal mode to enable the wind power generator to generate electric energy according to maximum power extracting curves, and judging whether rotation speed control conditions are met or not, if the rotation speed control conditions are met, switching the operation mode of the wind power generator to a rotation speed control mode to limit the output electric energy of the wind power generator through a maximum power point offset mode, and judging whether external wind power is greater than the a preset wind speed or not, if the external wind power is greater than the preset wind speed, switching the operation mode of the wind power generator to a safe mode to lower the rotation speed of the wind power generator through a maximum torque extraction mode to protect the wind power generation system.
Description
Technical field
The present invention relates to a kind of power generation system and controlling method thereof, and in particular to a kind of wind-power generating system and controlling method thereof.
Background technique
In recent years, due to the new line of environmental consciousness, the technology of the renewable sources of energy is developed rapidly.Among these renewable sources of energy, wind-power electricity generation is a kind of simple and generation mode of no pollution, the flabellum of the wind-drive wind-driven generator that it utilizes nature to produce, export external wind to be converted to electric energy, and then the electric power that supply load (as: battery or transmission of electricity grid) is certain.
But when external wind strengthens, the flabellum rotating speed of wind-driven generator also increases thereupon, what the electric energy that wind-driven generator is produced may be greater than load can tolerance range, causes the equipment failure of power generation system.Moreover, when external wind is excessive, wind-driven generator body possibly cannot bear too high rotating speed and out of control or damage.
In known technology, the protection mechanism of carrying out wind-driven generator when external wind is excessive comprises by the three-phase output short-circuit of electronic component by generator, is down to minimum to utilize the moment of torsion of generator by the rotating speed of flabellum and generator.Such as, utilize relay or circuit breaker, and with automatically controlled mode or manually mode start, with the three-phase output short-circuit by generator.But, when wind-driven generator be in run up time, if utilize the generator Maximum Torque of three-phase shortcircuit mode directly to stop anxious for wind-driven generator, easily cause the damage on flabellum and electric generator structure.
Therefore, so far known technology still have above-mentioned shortcomings and deficiencies part need solve.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of wind-power generating system and controlling method thereof, wherein wind-power generating system at least comprises wind-driven generator, control unit and load unit, and above-mentioned controlling method comprises following operative step.First, control unit is started, to determine the operator scheme of wind-driven generator.Subsequently, wind-driven generator is set in normal mode, makes wind-driven generator extract curve according to peak output and produce electric energy.Then, judge whether to meet rotating speed controlled conditions, if so, switching wind power generator by normal mode to rotating speed control mode, with by maximum power point offset manner restriction wind-driven generator output electric energy.Thereafter, judge whether external wind is greater than default wind speed, if so, switching wind power generator is by rotating speed control mode to safe mode, to be reduced the rotating speed of wind-driven generator by Maximum Torque extracting mode, protects wind-power generating system.
According to an embodiment of content of the present invention, said method is also included in detection external wind in the unit time and whether is still greater than default wind speed, if so, maintains wind-driven generator in safe mode.
According to an embodiment of content of the present invention, what its medium speed controlled conditions comprised that electric energy that wind-driven generator produces is greater than load unit can tolerance range.
According to an embodiment of content of the present invention, the rotating speed that its medium speed controlled conditions comprises wind-driven generator is greater than preset security rotating speed.
According to an embodiment of content of the present invention, what the extraction electric current that its medium speed controlled conditions comprises wind-driven generator was greater than coiling wire diameter can tolerance range.
According to an embodiment of content of the present invention, its medium speed controlled conditions comprises the noise that wind-driven generator produces and is greater than pre-set specifications value.
According to an embodiment of content of the present invention, wherein when wind-driven generator operates in safe mode, wind-driven generator is pulled down to low-speed running state.
According to an embodiment of content of the present invention, the electric energy that wherein wind-driven generator produces is dispensed in load unit and brake units by control unit.
Another object of the present invention is to provide a kind of wind-power generating system, comprise wind-driven generator, control unit and load unit.Wind-driven generator comprises blower module and generator, and wherein blower module is by the promotion of external wind, produces electric energy to drive the running of generator.Control unit electric property coupling wind-driven generator, and the intensity of the rotating speed of foundation wind-driven generator, output power, extraction electric current, noise and external wind determines that wind-driven generator operates in the one in normal mode, rotating speed control mode and safe mode.Load unit electric property coupling control unit, in order to receive the electric energy that wind-driven generator produces.
According to an embodiment of content of the present invention, said system also comprises brake units.Brake units electric property coupling wind-driven generator and control unit, the electric energy distributed in order to reception control unit.
According to an embodiment of content of the present invention, said system also comprises brake units.This wind-driven generator of brake units electric property coupling and this control unit, and in order to receive the control signal that this control unit produces, the switch periods of this brake units is adjusted, to control the rotating speed of this wind-driven generator.
According to an embodiment of content of the present invention, wherein control unit operates in normal mode in order to control wind-driven generator, and wind-driven generator extracts curve generation electric energy at normal mode according to a peak output.
According to an embodiment of content of the present invention, wherein wind-driven generator is switched to rotating speed control mode by normal mode in order to the rotating speed controlled conditions according to wind-driven generator by control unit, makes the output electric energy restriction of wind-driven generator within the specific limits.In addition, wind-power generating system can comprise brake units, wherein brake units electric property coupling wind-driven generator and control unit, and in order to a control signal that reception control unit produces, wherein under rotating speed control mode, the switch periods of brake units carries out adjusting according to control signal and controls the rotating speed of wind-driven generator.
According to an embodiment of content of the present invention, the speed that control unit is used to an external wind be greater than one when presetting wind speed by switching wind power generator by rotating speed control mode to safe mode.
According to an embodiment of content of the present invention, control unit in order to judge whether the speed of an external wind is greater than one and presets wind speed, and is down to a low-speed running state by slow for the rotating speed of wind-driven generator when the speed of external wind is greater than default wind speed.
Beneficial effect of the present invention is, therefore, the technology contents using the present invention to invent can improve shortcoming and the deficiency of above-mentioned known technology, slows down and suddenly stops caused damage at high wind speed apparatus for lower wind generator.
Accompanying drawing explanation
For above and other object of the present invention, feature, advantage and embodiment can be become apparent, appended the description of the drawings is as follows:
Fig. 1 illustrates the circuitry block schematic diagram of a kind of wind-power generating system of the mode of execution according to content of the present invention.
Fig. 2 illustrates the output power schematic diagram under the normal mode of wind-driven generator in an embodiment of content of the present invention, rotating speed control mode and safe mode.
Fig. 3 illustrates the schematic flow sheet of the controlling method of a kind of wind-power generating system of the mode of execution according to content of the present invention.
Fig. 4 illustrates the moment of torsion rotating speed curve synoptic diagram of wind-driven generator under the peak output of each wind speed is extracted in an embodiment of content of the present invention.
Fig. 5 A illustrates wind-driven generator in an embodiment of content of the present invention and extracts the moment of torsion rotating speed curve synoptic diagram under extracting with Maximum Torque in peak output.
Fig. 5 B illustrates wind-driven generator in an embodiment of content of the present invention and extracts the moment of torsion rotating speed curve synoptic diagram under extracting with Maximum Torque in the peak output of each wind speed.
Wherein, description of reference numerals is as follows:
100: wind-power generating system
110: wind-driven generator
112: blower module
114: generator
120: control unit
130: load unit
140: brake units
310 ~ 370: operating procedure
500,510,512,514,518,520: curve
Embodiment
Below by with accompanying drawing and describe the spirit clearly demonstrating content of the present invention in detail, in any art, technician is after the preferred embodiment understanding content of the present invention, when can by the technology of content institute of the present invention teaching, be changed and modify, it does not depart from spirit and the scope of content of the present invention.
About " about " used herein, " approximately " or " roughly about " be commonly the error of exponential quantity or scope within 20 percent, be then more preferably preferably within 10 within 5 percent.Wen Zhongruo is without clearly stating, and the numerical value mentioned by it all regards as approximative value, namely as " about ", " approximately " or the error represented by " roughly about " or scope.
Fig. 1 illustrates the circuitry block schematic diagram of a kind of wind-power generating system 100 of the mode of execution according to content of the present invention.Wind-power generating system 100 can comprise wind-driven generator 110, control unit 120 and load unit 130.Wind-driven generator 110 can comprise blower module 112 and generator 114, and wherein blower module 112 is by the promotion of external wind, produces electric energy in order to drive the running of generator 114.Control unit 120 electric property coupling wind-driven generator 110 (or directly or indirectly coupling generator 114), and determine the one in normal mode, rotating speed control mode and safe mode that wind-driven generator 110 operates in as shown in Figure 2 according to the intensity of the rotating speed of wind-driven generator 110, output power, extraction electric current, noise and external wind, to limit the rotating speed of wind-driven generator 110 and output power in safety range.Fig. 2 illustrates the output power schematic diagram under the normal mode of wind-driven generator 110 in an embodiment of content of the present invention, rotating speed control mode and safe mode.
Load unit 130 electric property coupling control unit 120, can in order to receive the electric energy that wind-driven generator 110 produces.In the present embodiment, load unit 130 can comprise power transmission network (Grid) and charge storage unit (such as: battery), and the configuration mode of whole wind-power generating system 100 is not as limit.
It should be noted that, in the present embodiment, blower module 112 can comprise multiple flabellum (fan blades), when external wind promotes flabellum and produces moment of torsion, namely blower module 112 rotates by the driving of moment of torsion, and drive generator 114, to produce electric energy by transmission device (not illustrating).
In an embodiment of content of the present invention, wind-power generating system 100 also can comprise brake units 140.Brake units 140 electric property coupling wind-driven generator 110 and control unit 120, the electric energy that can distribute in order to reception control unit 120, with the electric energy regulating wind-driven generator 110 to send load unit 130 to.On the other hand, brake units 140 also can the control signal that produces of reception control unit 120, brake units 140 by the switch periods of control signal adjustment itself, to control the rotating speed of wind-driven generator 110.
Referring to Fig. 1 and Fig. 2.When external wind is less than wind speed (such as: 12m/s) of A point, wind-driven generator 110 operates in normal mode.Now, wind-driven generator 110 extracts curve (maximum power extraction curve) according to peak output and produces electric energy, makes it under each corresponding wind speed, all have maximum power output.
When external wind is greater than the wind speed of A point and is less than the wind speed (such as: 18m/s) of C point or meets the judgment mechanism of above-mentioned rotating speed controlled conditions, wind-driven generator 110 is switched to rotating speed control mode by normal mode by control unit 120, to be limited the output electric energy of wind-driven generator 110 by maximum power point skew (maximum power pointshifting) mode, and control the rotating speed of wind-driven generator 110.It should be noted that, in this rotating speed control mode, control unit 120 extracts the skew of curve by peak output, makes wind-driven generator 110 no longer extract curve according to peak output and produces electric energy.In addition, the excrescent electric power that wind-driven generator 110 produces can be dispensed in brake units 140 by control unit 120, the electric energy received with regulating load unit 130.Moreover control unit 120 also can provide control signal to brake units 140, by adjusting the switch periods of brake units 140, to control the rotating speed of wind-driven generator 110.Therefore, in rotating speed control mode, wind-driven generator 110 still can remain within the scope of safe speed of rotation under the lifting of external wind, and maintains certain output power, as shown in B point in Fig. 2.
When external wind is greater than the wind speed of C point, the rotating speed of wind-driven generator 110 cannot be controlled by above-mentioned rotating speed control mode again, and wind-driven generator 110 may be made to produce the phenomenons such as the out of control or damage of rotating speed.Now, wind-driven generator 110 can be switched to safe mode by rotating speed control mode by control unit 120, and extracts by Maximum Torque the rotating speed that (maximum torque extraction) mode reduces wind-driven generator 110.Therefore, wind-driven generator 110 is pulled down to low-speed running state, and the low-power that wind-driven generator 110 is roughly about maintained in fig. 2 shown in D point in the secure mode exports, to protect the normal operation of wind-power generating system 100.
Fig. 3 illustrates the schematic flow sheet of the controlling method of a kind of wind-power generating system of the mode of execution according to content of the present invention.This controlling method can be applicable in the wind-power generating system 100 shown in Fig. 1, but not as limit, its apparatus structure is same as the previously described embodiments or similar, repeats no more in this.Simultaneously with reference to Fig. 1 and Fig. 3, first, in the step 310, control unit 120 can be started, to determine the operator scheme of wind-driven generator 110.Subsequently, in step 320, wind-driven generator 110 is set in normal mode, makes wind-driven generator 110 can extract curve according to peak output and produce electric energy.It should be noted that, in this normal mode, along with the lifting of external wind, the rotating speed of blower module 112 increases thereupon, and the electric energy that generator 114 is produced also increases thereupon.In addition, it is the maximum power output state that blower module 112 mates under each wind speed with generator 114 that peak output extracts curve, makes wind-driven generator 110 all have maximum power output under each wind speed of correspondence.
Then, in a step 330, control unit 120 can judge whether rotating speed controlled conditions meets.For example, rotating speed controlled conditions can comprise electric energy that wind-driven generator 110 produces be greater than load unit 130 can tolerance range (such as: 100MW), wind-driven generator 110 rotating speed is greater than preset security rotating speed (such as: 1200rpm), the extraction electric current of wind-driven generator 110 is greater than coiling wire diameter can be greater than at least one in pre-set specifications value (such as: 75dB) by the noise (such as: mechanicalness noise or aerodynamic noise) that produces of tolerance range (such as: 30A) and wind-driven generator 110.If the words that rotating speed controlled conditions meets, perform step 340, wind-driven generator 110 is switched to rotating speed control mode by normal mode, with the output electric energy by maximum power point offset manner restriction wind-driven generator 110 in safety range, the electric energy that wind-driven generator 110 is produced be less than load unit 130 can tolerance range, wind-driven generator 110 rotating speed is less than preset security rotating speed, the extraction electric current of wind-driven generator 110 is less than coiling wire diameter can be less than at least one in pre-set specifications value by the noise that produces of tolerance range and wind-driven generator 110.If the incongruent words of rotating speed controlled conditions, then return back to step 320.Moreover the electric energy that wind-driven generator 110 produces is dispensed to load unit 130 with brake units 140 by control unit 120, the electric energy received with regulating load unit 130 is can within tolerance range.
Thereafter, in step 350, control unit 120 can judge whether the speed of external wind is greater than default wind speed (such as: 18m/s).If so, perform step 360, switching wind power generator 110 to safe mode, to be reduced the rotating speed of wind-driven generator 110 by Maximum Torque extracting mode, protects the safety of whole wind-power generating system 100 by rotating speed control mode.If not, then step 320 is returned back to.
In an embodiment of content of the present invention, said method is also included in detection external wind in the unit time and whether is still greater than default wind speed, as shown in step 370.If so, step 360 is performed, to maintain wind-driven generator 110 in safe mode.If not, then step 320 is returned back to.
For example, when typhoon is attacked, its moment the maximum wind speed (such as: 18m/s) that can bear often beyond wind-driven generator 110 of wind-force, therefore, attack period at typhoon, control unit 120 can according to detect average or moment air speed value wind-driven generator 110 is switched to safe mode.Subsequently, control unit 120 can detect external wind and whether still be greater than default wind speed within the unit time (such as: 1 hour, 12 hours or 24 hours), with judge typhoon whether away from.Such as, when the average external wind-force when detected 12 hours is not greater than default wind speed, represent typhoon away from, then can return back to step 320, to recover wind-driven generator 110 in normal mode.
Referring to Fig. 1 ~ Fig. 4.Fig. 4 illustrates the moment of torsion rotating speed curve synoptic diagram under the peak output of each wind speed is extracted of wind-driven generator 110 in an embodiment of content of the present invention, and the moment of torsion of the wind-driven generator 110 when wherein curve 402 ~ curve 420 represents that external wind is 2m/s ~ 20m/s is respectively to speed curves figure.For example, the maximum moment of torsion that bears of wind-driven generator 110 can be 5.9N-m, and preset security rotating speed is below 1200rpm.When external wind is 10m/s, it be 4N-m and rotating speed is in the safety range of 700rpm that wind-driven generator 110 can be controlled in moment of torsion, as shown in the M point of Fig. 4.When wind-power lifting is to 12m/s, the rotating speed of wind-driven generator 110 is to control at 700rpm, then moment of torsion reaches the maximum 5.9N-m bearing moment of torsion, as shown in the E point of Fig. 4.When wind-power lifting is to 20m/s, the rotating speed of wind-driven generator 110 is to control at 700rpm, then moment of torsion reaches 13.5N-m, as shown in the G point of Fig. 4, has now exceeded the maximum of wind-driven generator 110 and has born moment of torsion, caused the damage of wind-driven generator 110.In addition, when wind-force is 20m/s, the moment of torsion of wind-driven generator 110 is to control at 5.9N-m, then rotating speed reaches 2400rpm, and as shown in the F point of Fig. 4, now rotating speed far exceedes the preset security rotating speed of wind-driven generator 110, and causes the damage of wind-driven generator 110.It can thus be appreciated that, in the present embodiment, when external wind is greater than 12m/s, wind-driven generator 110 must be switched to rotating speed control mode or safe mode, and to be offset by maximum power point or Maximum Torque extracting mode controls the rotating speed of wind-driven generator 110 and moment of torsion in safety range, to maintain the normal operation of wind-power generating system 100.
Fig. 5 A illustrates wind-driven generator 110 in an embodiment of content of the present invention and extracts the moment of torsion rotating speed curve synoptic diagram under extracting with Maximum Torque in peak output.Curve 500 is the torque-speed curve of wind-driven generator 110 under Maximum Torque is extracted, and curve 510 is the torque-speed curve under the peak output of wind-driven generator 110 when external wind is 10m/s is extracted.When wind-force is excessive, wind-driven generator 110 can be arranged at safe mode by controller 120, and by the current draw of Maximum Torque, as shown in curve 500, to suppress the moment of torsion that external wind is brought into by blower module 112, be down to low-speed running state by slow for the rotating speed of wind-driven generator 110.When wind-force is not excessive, if wind-driven generator 110 is arranged at safe mode, then the rotating speed of wind-driven generator 110 can drop to close to halted state, as shown in the plotted point of curve 500 and curve 510.
Fig. 5 B illustrates wind-driven generator 110 in an embodiment of content of the present invention and extracts the moment of torsion rotating speed curve synoptic diagram under extracting with Maximum Torque in the peak output of each wind speed, wherein curve 500 is the torque-speed curve of wind-driven generator 110 under Maximum Torque is extracted, and curve 510 ~ curve 520 is respectively the torque-speed curve under the peak output extraction of wind-driven generator 110 when external wind is 10m/s ~ 20m/s.If for the external wind of 12m/s, Maximum Torque extracts curve and peak output extracts curve intersection in J point, and therefore, when wind-driven generator 110 operates in safe mode, the rotating speed of wind-driven generator 110 under Maximum Torque extraction state is about 20rpm.When external wind is promoted to 20m/s, the rotating speed of wind-driven generator 110 under Maximum Torque extraction state is also increased to about 100rpm thereupon, as shown in M point.Therefore, in the present embodiment, wind-driven generator 110 has the advantage of ACTIVE CONTROL, and can slow down and stop caused damage high wind speed apparatus for lower wind generator 110 is anxious.
Compared to the known practice, in content above-described embodiment of the present invention, control unit initiatively can judge the operator scheme of wind-driven generator according to the intensity of above-mentioned rotating speed controlled conditions and external wind, make wind-driven generator can operate in normal mode, rotating speed control mode and safe mode, and control rotating speed and the output power of wind-driven generator respectively by modes such as peak output extraction, maximum power point skew and Maximum Torque extractions, to maintain the normal operation of whole wind-power generating system.
Step mentioned in content of the present invention, except chatting its order person bright especially, all can adjust its tandem according to actual demand, even can perform simultaneously or partly simultaneously, and not be limited with above-mentioned.
Although the present invention discloses as above with mode of execution; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when being used for a variety of modifications and variations, therefore protection scope of the present invention is when being as the criterion depending on the claim person of defining.
Claims (12)
1. a controlling method for wind-power generating system, wherein this wind-power generating system at least comprises a wind-driven generator, a control unit and a load unit, and this controlling method comprises:
Start this control unit, to determine the operator scheme of this wind-driven generator;
This wind-driven generator is set in a normal mode, makes this wind-driven generator extract curve according to a peak output and produce electric energy;
Judge whether to meet a rotating speed controlled conditions, if so, switch this wind-driven generator by this normal mode to one rotating speed control mode, to be limited the output electric energy of this wind-driven generator by a maximum power point offset manner; And
Judge whether external wind is greater than one and presets wind speed, if so, switches this wind-driven generator by this rotating speed control mode to one safe mode, to be reduced the rotating speed of this wind-driven generator by a Maximum Torque extracting mode, protects this wind-power generating system.
2. the method for claim 1, also comprises:
Within a unit time, detect external wind whether be still greater than this default wind speed, if so, maintain this wind-driven generator in this safe mode.
3. the method for claim 1, wherein this rotating speed controlled conditions comprises:
What the electric energy that this wind-driven generator produces was greater than this load unit can tolerance range.
4. the method for claim 1, wherein this rotating speed controlled conditions comprises:
The rotating speed of this wind-driven generator is greater than a preset security rotating speed.
5. the method for claim 1, wherein this rotating speed controlled conditions comprises:
What the extraction electric current of this wind-driven generator was greater than coiling wire diameter can tolerance range.
6. the method for claim 1, wherein this rotating speed controlled conditions comprises:
The noise that this wind-driven generator produces is greater than a pre-set specifications value.
7. the method for claim 1, the electric energy that wherein this wind-driven generator produces is dispensed in this load unit and a brake units by this control unit.
8. a wind-power generating system, comprises:
One wind-driven generator, comprises a blower module and a generator, and this blower module, by the promotion of external wind, produces electric energy to drive this generator operation;
One control unit, this wind-driven generator of electric property coupling, and determine that this wind-driven generator operates in the one in a normal mode, a rotating speed control mode and a safe mode according to the intensity of the rotating speed of this wind-driven generator, output power, extraction electric current, noise and external wind; And
One load unit, this control unit of electric property coupling, in order to receive the electric energy that this wind-driven generator produces;
Wherein, this control unit operates in this normal mode in order to control this wind-driven generator, and this wind-driven generator extracts curve generation electric energy at this normal mode according to a peak output;
This wind-driven generator is switched to this rotating speed control mode by this normal mode in order to the rotating speed controlled conditions according to this wind-driven generator by this control unit, makes the output electric energy restriction of this wind-driven generator within the specific limits;
The speed that this control unit is used to an external wind be greater than one when presetting wind speed by this switching wind power generator by this rotating speed control mode to this safe mode.
9. wind-power generating system as claimed in claim 8, also comprises:
One brake units, this wind-driven generator of electric property coupling and this control unit, in order to receive the electric energy that this control unit distributes, with the electric energy regulating this wind-driven generator to send this load unit to.
10. wind-power generating system as claimed in claim 8, also comprises:
One brake units, this wind-driven generator of electric property coupling and this control unit, and in order to receive the control signal that this control unit produces, the switch periods of this brake units is adjusted, to control the rotating speed of this wind-driven generator.
11. wind-power generating systems as claimed in claim 8, also comprise:
One brake units, this wind-driven generator of electric property coupling and this control unit, and in order to receive the control signal that this control unit produces, wherein under this rotating speed control mode, the switch periods of this brake units carries out adjusting according to this control signal and controls the rotating speed of this wind-driven generator.
12. wind-power generating systems as claimed in claim 8, wherein this control unit is in order to judge whether the speed of an external wind is greater than one and presets wind speed, and is down to a low-speed running state by slow for the rotating speed of this wind-driven generator when the speed of this external wind is greater than this default wind speed.
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| CN103362745A (en) * | 2012-04-10 | 2013-10-23 | 台达电子工业股份有限公司 | Wind power generation system |
| CN104454551B (en) * | 2013-09-18 | 2017-08-29 | 台达电子工业股份有限公司 | Blower fan control system and its control method |
| CN104832371B (en) * | 2015-05-28 | 2017-10-24 | 大唐山东烟台电力开发有限公司 | A kind of wind power generating set control method and system |
| CN105649876B (en) * | 2015-12-31 | 2018-10-19 | 北京金风科创风电设备有限公司 | Control method and device of wind generating set |
| US10697439B2 (en) * | 2017-06-14 | 2020-06-30 | General Electric Company | Offset toggle method for wind turbine operation |
| CN114320741A (en) * | 2020-09-30 | 2022-04-12 | 新疆金风科技股份有限公司 | Power control method and equipment of wind generating set |
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| US20100295305A1 (en) * | 2009-05-20 | 2010-11-25 | E-Net, Llc | Wind turbine and control system |
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