CN106930899B - The electric power system and method for supplying power to of a kind of yaw motor in wind turbine - Google Patents
The electric power system and method for supplying power to of a kind of yaw motor in wind turbine Download PDFInfo
- Publication number
- CN106930899B CN106930899B CN201610390629.0A CN201610390629A CN106930899B CN 106930899 B CN106930899 B CN 106930899B CN 201610390629 A CN201610390629 A CN 201610390629A CN 106930899 B CN106930899 B CN 106930899B
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- Prior art keywords
- power
- yaw motor
- vertical axis
- wind
- axis aerogenerator
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000010248 power generation Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000002803 fossil fuel Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 11
- 108010066057 cabin-1 Proteins 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 108010066114 cabin-2 Proteins 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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
- F03D7/06—Controlling wind motors the wind motors having rotation axis substantially perpendicular to the air flow entering the rotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/30—Control parameters, e.g. input parameters
- F05B2270/329—Azimuth or yaw angle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/60—Control system actuates through
- F05B2270/602—Control system actuates through electrical actuators
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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
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The present invention relates to the electric power systems and method of supplying power to of the yaw motor in a kind of wind turbine, the system includes, yaw motor in cabin, the variable frequency drives being connect with yaw motor, the variable frequency drives connect to power for yaw motor with power grid, vertical axis aerogenerator is installed, vertical axis aerogenerator is connect by variable frequency drives with yaw motor, to power in electric network power-fail as yaw motor above the cabin.The method of supplying power to mainly includes：Judge whether power grid power supply is normal, when powering normal, power grid is powered for yaw motor, when electric network power-fail, vertical axis aerogenerator power generation, and power for yaw motor.The vertical axis aerogenerator of the present invention needs not rely on spare fossil fuel or accumulator, therefore power-on time is long, and the cost of vertical axis aerogenerator is low, light-weight, installs and easy to maintain, brings larger economic benefit.
Description
Technical field
The present invention relates to wind power generation field, the electric power system and supplier of electricity of the yaw motor in especially a kind of wind turbine
Method.
Background technology
As conventional energy resource shortage and problem of environmental pollution aggravate, wind energy develops profit as renewable green energy resource to it
With particularly significant.In wind-power electricity generation, in order to improve wind energy utilization, the yaw system of wind power generating set will have automatically partially
The function of boat, i.e. yaw system want automatic accurate to wind.After weather forecast has violent typhoon, the central controller of wind field can order
It enables and being shut down per Fans, impeller alignment wind direction, vane propeller-changing to feathering angle can make the circumferential torque generated on wind wheel in this way
With axial thrust minimum.Especially at sea wind field, sometimes strength typhoon can destroy network system so that the outer net power supply of wind turbine
Circuit is cut off, and can not be repaired in time into row line at this time, is also had ship once in a while except weather conditions in addition to and is cast anchor that pound disconnected seabed electric
The accident of cable, yaw motor need to enable stand-by power supply power supply, there are two types of existing yaw motor stand-by power supply is general, Yi Zhongwei
Accumulator, usually accumulator is by grid charging, and after electric network power-fail, accumulator is powered for yaw motor；Another kind is sent out for diesel oil
Motor, diesel-driven generator works after electric network power-fail, powers for yaw motor.All there is certain offices for both power supply modes
It is sex-limited, first, by the way of storage battery power supply, need that the accumulator of a larger capacity is installed in cabin, it is not only of high cost,
And limited battery life, power-on time is short, and maintenance cost is high, and by the way of diesel-driven generator power supply, equipment volume is big,
Generating efficiency is low, and needs fuel consumption, starts slowly, and diesel-driven generator discharges meeting contaminated equipment in cabin, and has fire
Calamity wind limits, and maintenance cost is also higher.
Given this present invention is proposed.
Invention content
It is an object of the present invention to overcome the deficiencies of the prior art and provide one kind in electric network power-fail, using vertical
The electric power system of yaw motor in the wind turbine of axis wind power generator power generation.
Another object of the present invention is to provide a kind of method of supplying power to of the electric power system of the yaw motor in wind turbine, with reality
Existing low cost, Non-energy-consumption, can quick response power supply mode.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that：
The electric power system of yaw motor in a kind of wind turbine, including the yaw motor in cabin, with yaw motor
The variable frequency drives of connection, the variable frequency drives are connect with power grid for powering for yaw motor, the top peace of the cabin
Equipped with vertical axis aerogenerator, the vertical axis aerogenerator is connect by variable frequency drives with yaw motor, in electricity
It powers during net power down for yaw motor.
Further, the variable frequency drives are equipped with power grid access interface, vertical axis aerogenerator access interface and yaw
Motor access interface, the power grid access interface and vertical axis aerogenerator access interface in parallel with yaw motor
Access interface connects.
Further, electric network power-fail trigger switch is equipped in the variable frequency drives, the electric network power-fail trigger switch is with hanging down
D-axis wind-driven generator access interface is connected, and vertical axis aerogenerator access interface and yaw electricity are connected in electric network power-fail
Machine access interface.
Further, the vertical axis aerogenerator is arranged on the wind wheel rear of wind-driven generator, vertical axis wind power generation
The height of machine is less than the height of the wind vane of wind-driven generator.
Further, brake gear is equipped in the vertical axis aerogenerator, the brake gear is powered by power grid, in electricity
During net power down, the brake gear releases the braking action to vertical axis aerogenerator.
A kind of method of supplying power to of the electric power system of yaw motor in wind turbine, includes the following steps：
The first step judges whether power grid power supply is normal, and when powering normal, power grid is powered for yaw motor, when power grid falls
When electric, vertical axis aerogenerator is connected with yaw motor；
Second step, vertical axis aerogenerator power generation, and power for yaw motor.
Further, in the first step, when power grid power supply is normal, vertical axis aerogenerator is in braking state, works as electricity
During net power down, the braking state of vertical axis aerogenerator releases.
Further, in second step, the alternating current that vertical axis aerogenerator generates is first through variable frequency drives frequency conversion, transformation
Treatment and supplied yaw motor, when vertical axis aerogenerator is powered, variable frequency drives adjust yaw rotating speed and are supplied less than power grid
Rotating speed when electric, so that smaller power provides enough yaw torques.
After technical solutions according to the invention, following advantageous effect is brought：
Present invention eliminates the standby power systems of the yaw motor in original wind-driven generator, are changed to vertical-shaft wind hair
Stand-by power supply of the motor as yaw motor under normal circumstances, is mainly caused just start yaw during electric network power-fail by violent typhoon
Motor stand-by power supply, the vertical axis aerogenerator in the present invention can efficiently use the energy of typhoon as yaw motor power supply,
Spare fossil fuel or accumulator are needed not rely on, therefore power-on time can be identical with the action time of typhoon, not by energy storage
Insufficient limitation, and the cost of vertical axis aerogenerator is low, it is light-weight, it installs and easy to maintain, effectively reduces enterprise
Cost brings larger economic benefit.
Description of the drawings
Fig. 1：The structure diagram of the present invention；
Fig. 2：The catenation principle figure of the present invention；
Wherein：1st, cabin 2, wheel hub 3, wind wheel 4, tower 5, yaw motor 6, spindle box 7, gear shift
Case 8, generator 9, variable frequency drives 10, vertical axis aerogenerator 11, power grid access interface 12, vertical shaft wind
Power generator access interface 13, yaw motor access interface 14, fixed seat 15, main shaft 16, blade 17, wind direction
Mark.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, wind-driven generator, generally may include, and tower 4, the cabin 1 in tower 4, mounted on cabin
The wheel hub 2 and wind wheel 3 of 1 front side, are equipped with spindle box 6, speed-changing gear box 7 and generator 8, the top outside cabin 1 in cabin 1
Equipped with wind vane 17, the shaft of the generator 8 is connect by speed-changing gear box 7 and spindle box 6 with wheel hub 2, when wind wheel 3 rotates
Drive 8 shaft rotary electrification of generator.
A kind of electric power system of yaw motor in wind turbine is installed in above-mentioned wind-driven generator, including mounted on cabin
Yaw motor 5 in 1, the variable frequency drives 9 being connect with yaw motor 5, it is inclined that the variable frequency drives 9 are connect with power grid
Avionics machine 5 is powered.Yaw motor 5 drives cabin 1 to rotate integrally, and makes wind wheel 3 always in state windward, so as in power generation most
Wind energy is absorbed to limits, when strong wind cuts out full feathering state by wind load minimum.Vertical axis is also equipped in the top of cabin 1
Wind-driven generator 10, the vertical axis aerogenerator 10 is connect by variable frequency drives 9 with yaw motor 5, to fall in power grid
When electric, vertical axis aerogenerator 10 is powered as stand-by power supply for yaw motor 5.
The vertical axis aerogenerator 10 is arranged on 3 rear of wind wheel of wind-driven generator and the front of wind vane 17, with
The influence to wind wheel 3 is reduced, to reduce the influence to wind vane 17, the height of vertical axis aerogenerator 10 is less than wind vane 17
Height.
As shown in Fig. 2, the variable frequency drives 9 are equipped with power grid access interface 11, vertical axis aerogenerator access interface
12 and yaw motor access interface 13, the power grid access interface 11 and vertical axis aerogenerator access interface 12 in parallel
Mode is connect with yaw motor access interface 13.The alternating current come from power grid or the conveying of vertical axis aerogenerator 10 drives through frequency conversion
7 internal circuit treatment and supplied yaw motor 5 of dynamic device, enables yaw motor 5 to work normally.
Electric network power-fail trigger switch is equipped in the variable frequency drives 9, the electric network power-fail trigger switch includes motion end
And control terminal, motion end are connected with vertical axis aerogenerator access interface 12, control terminal and line series, in electric network power-fail
Motion end connects vertical axis aerogenerator access interface 12 and yaw motor access interface 13.Electric network power-fail trigger switch can be with
Using contactor, wherein, control terminal is coil, and motion end is normally-closed contact, and normally-closed contact connects with vertical axis aerogenerator
Inbound port 12 is connected, the coil and line series of contactor, and when power grid is powered, coil obtains electric, normally-closed contact disconnection, vertical axis
Wind-driven generator 10 is disconnected with yaw motor 5, and when electric network power-fail, coil losing electricity, normally-closed contact is closed, and makes vertical shaft wind
Power generator 10 is connected with yaw motor 5, is realized for electrical connection.
Preferably, brake gear is equipped in the vertical axis aerogenerator 10, the brake gear is powered by power grid,
During electric network power-fail, the brake gear releases the braking action to vertical axis aerogenerator 10.When power grid power supply is normal, hang down
D-axis wind-driven generator 10 is locked by brake gear, will not be rotated, to avoid the abrasion of its part, only after electric network power-fail,
Vertical axis aerogenerator 10 can just rotate, for generating electricity.The brake gear is existing vertical axis aerogenerator 10
The brake gear of interior installation, concrete structure are not described in detail herein.
General fan yaw speed is relatively low, and the power of yaw motor 5 is smaller, to ensure the normal operation of yaw motor 5, institute
The rated generation power for stating vertical axis aerogenerator 10 is preferably greater than the rated power of yaw motor 5, vertical axis wind power generation
The generated output of machine 10 is changed greatly by air speed influence, since the vertical axis aerogenerator 10 of the present invention is usually in typhoon day
Conductance causes just to start to work in the case of electric network power-fail, and in this case, the rotating speed of vertical axis aerogenerator 10 is generally possible to
Reach rated speed, i.e., generated electricity with rated power, even if vertical-axis generators 10 are unable to reach yaw rated power supply, yaw motor
5 still can be exported with constant torque, yawing velocity be reduced, to reduce power demand.
Preferably, the vertical axis aerogenerator 10 is using the higher lift vertical shaft wind-power electricity generation of generating efficiency
Machine, the type vertical axis aerogenerator have preferable aerodynamic performance.The vertical axis aerogenerator 10 generally may be used
Including, the fixed seat 14 positioned at bottom, change gear box and generator are installed in fixed seat 14, are rotatablely connected with fixed seat 14
Main shaft 15, the periphery of main shaft 15 is installed with multiple blades 16, and main shaft 15 passes through change gear box and connects with alternator shaft
It connects, fixed seat 14 can be bolted on 1 top of cabin.The main shaft 15 of vertical axis aerogenerator 10 and blower fan tower barrel 4
Axis is parallel.
A kind of method of supplying power to of the electric power system of yaw motor in wind turbine, includes the following steps：
The first step judges whether power grid power supply is normal, and when powering normal, power grid is powered for yaw motor 5, when power grid falls
When electric, vertical axis aerogenerator 10 is connected with yaw motor 5；
Second step, vertical axis aerogenerator 10 generate electricity, and power for yaw motor 5.
Specifically, in the first step, when power grid power supply is normal, vertical axis aerogenerator 10 is in braking state, together
When vertical axis aerogenerator 10 and the connection of yaw motor 5 be off, power grid is directly inclined by variable frequency drives 9
Avionics machine 5 is powered.When electric network power-fail, generally violent typhoon blows power grid, and power grid is made to be disconnected with wind power generating set, this
When, the braking state of vertical axis aerogenerator 10 releases, and vertical axis aerogenerator 10 and the confession of yaw motor 5 are electrically connected
It connects and is switched on.
In second step, vertical axis aerogenerator 10 generates alternating current under the action of the wind, and first through variable frequency drives 9
Frequency conversion, transformation treatment and supplied yaw motor 5, when vertical axis aerogenerator 10 is powered, variable frequency drives 9 adjust yaw and turn
Rotating speed when speed is less than power grid power supply, so that smaller power provides enough yaw torques.The supply voltage of general yaw motor 5
For 690V, frequency 50/60Hz, therefore, the voltage that variable frequency drives 9 export mutually should be 690V, 50/60Hz with frequency.Yaw
Motor 5 can still work normally, and can adjust 1 position of cabin in the case where vertical axis aerogenerator 10 is powered, and make wind
3 alignment wind direction of wheel, is damaged with reducing typhoon caused by wind-driven generator.
Exception, same principle are powered using other devices on vertical axis aerogenerator or wind-driven generator,
Such as, it powers for pitch motor, method of supplying power to is identical with the method for supplying power to of yaw motor.
The above is embodiments of the present invention, it is noted that for the ordinary skill in the art, not
It is detached under the premise of the principle of the invention, various deformation and improvement can also be made, this should also be considered as protection scope of the present invention.
Claims (9)
1. a kind of electric power system of the yaw motor in wind turbine, including the yaw motor in cabin connects with yaw motor
The variable frequency drives connect, the variable frequency drives connect to power for yaw motor with power grid, it is characterised in that：The cabin
Top vertical axis aerogenerator is installed, the vertical axis aerogenerator passes through variable frequency drives and connects with yaw motor
It connects, to power in electric network power-fail as yaw motor.
2. the electric power system of the yaw motor in a kind of wind turbine according to claim 1, it is characterised in that：The frequency conversion is driven
Dynamic device is equipped with power grid access interface, vertical axis aerogenerator access interface and yaw motor access interface, the power grid access
Port and vertical axis aerogenerator access interface are connect in parallel with yaw motor access interface.
3. the electric power system of the yaw motor in a kind of wind turbine according to claim 2, it is characterised in that：The frequency conversion is driven
Electric network power-fail trigger switch, the electric network power-fail trigger switch and vertical axis aerogenerator access interface string are equipped in dynamic device
Connection, and vertical axis aerogenerator access interface and yaw motor access interface are connected in electric network power-fail.
4. the electric power system of the yaw motor in a kind of wind turbine according to claim 1, it is characterised in that：The vertical axis
Wind-driven generator is arranged on the wind wheel rear of wind-driven generator, and the height of vertical axis aerogenerator is less than the wind of wind-driven generator
To target height.
5. the electric power system of the yaw motor in a kind of wind turbine according to claim 4, it is characterised in that：The vertical axis
Brake gear is equipped in wind-driven generator, the brake gear is powered by power grid, and in electric network power-fail, the brake gear releases
To the braking action of vertical axis aerogenerator.
6. the electric power system of the yaw motor in a kind of wind turbine according to claim 1, it is characterised in that：The vertical axis
Wind-driven generator is lifting-force type vertical-axis wind power generator.
7. a kind of method of supplying power to of the electric power system of yaw motor as in claim 1-6 any one of them wind turbines, special
Sign is, includes the following steps：
The first step judges whether power grid power supply is normal, and when powering normal, power grid is powered for yaw motor, when electric network power-fail,
Vertical axis aerogenerator is connected with yaw motor；
Second step, vertical axis aerogenerator power generation, and power for yaw motor.
8. the method for supplying power to of the electric power system of the yaw motor in a kind of wind turbine according to claim 7, it is characterised in that：
In the first step, when power grid power supply is normal, vertical axis aerogenerator is in braking state, when electric network power-fail, vertical axis
The braking state of wind-driven generator releases.
9. the method for supplying power to of the electric power system of the yaw motor in a kind of wind turbine according to claim 7, it is characterised in that：
In second step, the alternating current that vertical axis aerogenerator generates first is yawed through variable frequency drives frequency conversion, transformation treatment and supplied
Motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390629.0A CN106930899B (en) | 2016-06-06 | 2016-06-06 | The electric power system and method for supplying power to of a kind of yaw motor in wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610390629.0A CN106930899B (en) | 2016-06-06 | 2016-06-06 | The electric power system and method for supplying power to of a kind of yaw motor in wind turbine |
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| Publication Number | Publication Date |
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| CN106930899A CN106930899A (en) | 2017-07-07 |
| CN106930899B true CN106930899B (en) | 2018-06-26 |
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| CN201610390629.0A Expired - Fee Related CN106930899B (en) | 2016-06-06 | 2016-06-06 | The electric power system and method for supplying power to of a kind of yaw motor in wind turbine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10598148B2 (en) * | 2017-08-22 | 2020-03-24 | General Electric Company | System for controlling a yaw drive of a wind turbine when a native yaw drive control system is non-operational |
| CN107800190B (en) * | 2017-10-23 | 2020-06-30 | 新疆金风科技股份有限公司 | Wind generating set standby power system and control method thereof |
| CN113236490B (en) * | 2021-05-21 | 2022-06-14 | 中国华能集团清洁能源技术研究院有限公司 | Energy storage wind turbine generator set limit load control method, medium and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4304023B2 (en) * | 2003-08-07 | 2009-07-29 | 富士重工業株式会社 | Horizontal axis wind turbine and control method of horizontal axis wind turbine |
| CN201810491U (en) * | 2010-10-14 | 2011-04-27 | 冯忠昌 | Novel wind energy and luminous energy complementary generator device |
| KR20130058209A (en) * | 2011-11-25 | 2013-06-04 | 삼성중공업 주식회사 | Wind turbine having sub-wind turbine |
| KR101747098B1 (en) * | 2014-08-25 | 2017-06-21 | 전정석 | Wind power generating apparatus using vertizontal type impeller |
| CN205669458U (en) * | 2016-06-06 | 2016-11-02 | 北京普华亿能风电技术有限公司 | A kind of electric power system of the yaw motor in blower fan |
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