CN201687658U - Fixed-propeller pitch and direct-drive wind power generating device - Google Patents

Fixed-propeller pitch and direct-drive wind power generating device Download PDF

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Publication number
CN201687658U
CN201687658U CN2010201730371U CN201020173037U CN201687658U CN 201687658 U CN201687658 U CN 201687658U CN 2010201730371 U CN2010201730371 U CN 2010201730371U CN 201020173037 U CN201020173037 U CN 201020173037U CN 201687658 U CN201687658 U CN 201687658U
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CN
China
Prior art keywords
generator
fixed
rotor
permanent magnetism
pitch
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Expired - Fee Related
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CN2010201730371U
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Chinese (zh)
Inventor
程明
孙西凯
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Southeast University
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Southeast University
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The utility model relates to a fixed-propeller pitch and direct-drive wind power generating device which is characterized in that the device comprises a fixed-propeller pitch fan (1), a double-rotor permanent magnet generator (2) which is connected with the fixed-propeller pitch fan (1) and is provided with torque amplitude limitation, an electrical machine side rectifier (3) connected with the double-rotor permanent magnet generator (2) with the torque amplitude limitation, a net side inverter (5) connected with a power grid, a DC bus (6) which is connected between the electrical machine side rectifier (3) and the net side inverter (5) and a DC energy storing device (4) connected with the DC bus. The fixed-propeller pitch and direct-drive wind power generating device has higher power coefficient compared with a variable-propeller pitch wind power generating device set due to the adoption of the fixed-propeller pitch fan when the wind speed is lower, and can realize the stability for outputting the power which exceeds the rated power due to adoption of the double-rotor permanent magnet generator with the torque amplitude limitation after the wind speed exceeds the rated wind speed.

Description

Fixed-pitch direct-driving wind power generator
Technical field
The utility model is about a kind of fixed-pitch direct-driving wind power generator group designing technique, relates to the technical field of wind-power electricity generation and motor application.
Background technique
Along with the whole society to the giving more sustained attention of the energy and environmental problem, the development and use of renewable energy sources are just presenting the trend of accelerated development.Wind energy extensively exists on earth and is is one of the most ripe renewable energy sources that people grasped at present.Wind-power generating system is the device that in the wind power generating set mechanical energy is converted into electric energy, it is the instrument that motive force is connected with the output electric energy, it not only directly has influence on the quality and the efficient of output electric energy, also has influence on the performance of whole wind power conversion system and the structure of device.The wind power generating set of operation mainly is divided into two kinds now:
From 20th century the mid-80, take type as the leading factor with fixed pitch (Stall Type) wind power generating set, capacity increases to MW class from tens of kilowatts.The main structure characteristics of fixed pitch wind-power generating system are: blade was fixed with being connected of wheel hub, and promptly when wind speed changed, the angle that facings the wind of blade can not change thereupon.When wind speed during greater than the rated wind speed of blade design, blade enters stall conditions automatically, with Power Limitation near rating value.Under the situation of or load dump excessive when wind speed, the resistance that utilizes the blade tip flow spoiler to increase blade makes its dead halt.The fixed pitch wind generating set structure is simple, and reliable performance approaches rated point but work as wind speed, and power coefficient begins to decline to a great extent.Because at this moment along with the rising of wind speed, power rises and eases up, and after having crossed rated point, blade has begun stall, wind speed raises, and power descends on the contrary to some extent.
Another kind is the pitch-controlled wind-driven generator group, the pitch-controlled wind-driven generator group is compared with the fixed pitch wind power generating set, have rated power and put above power characteristics stably, the power adjustments of unit not exclusively relies on the aeroperformance of blade, when power surpasses rated power, pulp distance varying mechanism is started working, and adjusts the vanepiston angle, and the output power of generator is limited near the rating value.And for the Variable Pitch wind power generating set,, need not to worry the power points control problem after wind speed surpasses rated point because the blade pitch can control, can be so that rated power point still has higher power factor.But, the control of blade also new challenge has been proposed for the cost and the reliability of unit because having increased the complexity of control system and servo-system.
In recent years, along with science and technology development, people press for wind-power generating system can either be simple in structure, reliable performance, the power that needs again to be input to generator can be controlled, and the unit input power was stable when realization power was above above rated power, and higher power factor can be arranged.Therefore, work out and just to become the duty-bound mission critical of wind-powered electricity generation worker in conjunction with the new-generation unit of the advantage of fixed pitch and two wind power generating set of Variable Pitch.
Summary of the invention
Technical problem: the technical problems to be solved in the utility model provides a kind of fixed-pitch direct-driving wind power generator, adopt the fixed pitch blower fan, when wind speed is low, have the power factor higher than Variable Pitch wind power generating set, and after wind speed surpasses rated wind speed, utilize the birotor permanent magnetic that has torque amplitude limit directly to drive generator and can realize above the output of the power behind rated power stable problem.
Technological scheme: for solving the problems of the technologies described above, the technological scheme that the utility model provides is:
A kind of fixed-pitch direct-driving wind power generator, this device comprises fixed pitch blower fan, the birotor permanent magnetic generator that has torque amplitude limit that links to each other with this fixed pitch blower fan, the motor side rectifier that is connected with the birotor permanent magnetic generator that has torque amplitude limit, the net side inverter that links to each other with electrical network, be connected the dc bus between motor side rectifier and the net side inverter and be connected to dc energy storage device on the dc bus.
Preferably, the described birotor permanent magnetic generator that has torque amplitude limit outside in comprises generator unit stator successively, be provided with the generator permanent magnetism internal rotor and the generator p-m rotor that is provided with input and output shaft of bearing, the generator p-m rotor links to each other with the fixed pitch blower fan, and generator permanent magnetism internal rotor is connected on the generator p-m rotor input and output shaft by bearing.
Preferably, the described birotor permanent magnetic generator that has torque amplitude limit outwards comprises generator unit stator successively from the lining, be provided with the generator permanent magnetism internal rotor and the generator p-m rotor that is provided with input and output shaft of bearing, the generator p-m rotor links to each other with the fixed pitch blower fan, and generator permanent magnetism internal rotor is connected on the generator p-m rotor input and output shaft by bearing.
Preferably, described generator permanent magnetism internal rotor comprises the support iron hoop, is embedded in the outer permanent magnetism that supports the iron hoop outer surface, is embedded in the interior permanent magnetism that supports the iron hoop internal surface.
Beneficial effect: owing to adopted the fixed pitch blower fan, when hanging down wind speed, system has the power factor higher than Variable Pitch wind power generating set, and simple in structure, reliable performance.And owing to adopted the birotor permanent magnetic generator with torque amplitude limit, when wind speed surpassed rated wind speed, it was stable to keep output power, and has higher power factor.
Because rotor permanent magnetism and internal rotor permanent-magnetic magnetic linkage belong to cascaded structure, the internal rotor of increase can't significantly increase the volume of motor body.
Description of drawings
The structural drawing of the fixed-pitch direct-driving wind power generator that Fig. 1 provides for the utility model;
Wherein have: fixed pitch blower fan 1 has the birotor permanent magnetic generator 2 of torque amplitude limit, motor side rectifier 3, energy storage device 4, net side inverter 5, dc bus 6, generator unit stator 2.1, generator permanent magnetism internal rotor 2.2, generator p-m rotor 2.3.
Fig. 2 is for having the structural drawing of 2 two p-m rotors of birotor permanent magnetic generator of torque amplitude limit among Fig. 1;
Wherein have: generator permanent magnetism internal rotor 2.2 comprises three parts, and outer permanent magnetism 2.2.1 supports iron hoop 2.2.2, interior permanent magnetism 2.2.3, generator p-m rotor 2.3.Inside and outside two-layer permanent magnetism 2.2.1 of internal rotor and 2.2.3 and p-m rotor permanent magnetism 2.3.1 three part permanent magnetism all adopt the Surface mounted type structure.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Referring to Fig. 1, the fixed-pitch direct-driving wind power generator that the utility model provides, this device comprises fixed pitch blower fan 1, the birotor permanent magnetic generator 2 that has torque amplitude limit that links to each other with this fixed pitch blower fan 1, the motor side rectifier 3 that is connected with the birotor permanent magnetic generator 2 that has torque amplitude limit, the net side inverter 5 that links to each other with electrical network, be connected the dc bus 6 between motor side rectifier 3 and the net side inverter 5 and be connected to dc energy storage device 4 on the dc bus.
The birotor permanent magnetic generator 2 that has torque amplitude limit outside in comprises generator unit stator 2.1 successively, be provided with the generator permanent magnetism internal rotor 2.2 and the generator p-m rotor 2.3 that is provided with input and output shaft of bearing, generator p-m rotor 2.3 links to each other with fixed pitch blower fan 1, and generator permanent magnetism internal rotor 2.2 is connected on generator p-m rotor 2.3 input and output shafts by bearing.
The birotor permanent magnetic generator 2 that has torque amplitude limit outwards comprises generator unit stator 2.1 successively from the lining, be provided with the generator permanent magnetism internal rotor 2.2 and the generator p-m rotor 2.3 that is provided with input and output shaft of bearing, generator p-m rotor 2.3 links to each other with fixed pitch blower fan 1, and generator permanent magnetism internal rotor 2.2 is connected on generator p-m rotor 2.3 input and output shafts by bearing.
Generator permanent magnetism internal rotor 2.2 comprises support iron hoop 2.2.2, is embedded in the outer permanent magnetism 2.2.1 that supports iron hoop 2.2.2 outer surface, is embedded in the interior permanent magnetism 2.2.3 that supports iron hoop 2.2.2 internal surface.

Claims (4)

1. fixed-pitch direct-driving wind power generator, it is characterized in that: this device comprises fixed pitch blower fan (1), the birotor permanent magnetic generator (2) that has torque amplitude limit that links to each other with this fixed pitch blower fan (1), the motor side rectifier (3) that is connected with the birotor permanent magnetic generator (2) that has torque amplitude limit, the net side inverter (5) that links to each other with electrical network, be connected the dc bus (6) between motor side rectifier (3) and the net side inverter (5) and be connected to dc energy storage device (4) on the dc bus.
2. fixed-pitch direct-driving wind power generator according to claim 1, it is characterized in that: the described birotor permanent magnetic generator (2) that has torque amplitude limit outside in comprises generator unit stator (2.1) successively, be provided with the generator permanent magnetism internal rotor (2.2) of bearing and be provided with the generator p-m rotor (2.3) of input and output shaft, generator p-m rotor (2.3) links to each other with fixed pitch blower fan (1), and generator permanent magnetism internal rotor (2.2) is connected on generator p-m rotor (2.3) input and output shaft by bearing.
3. fixed-pitch direct-driving wind power generator according to claim 1, it is characterized in that: the described birotor permanent magnetic generator (2) that has torque amplitude limit outwards comprises generator unit stator (2.1) successively from the lining, be provided with the generator permanent magnetism internal rotor (2.2) of bearing and be provided with the generator p-m rotor (2.3) of input and output shaft, generator p-m rotor (2.3) links to each other with fixed pitch blower fan (1), and generator permanent magnetism internal rotor (2.2) is connected on generator p-m rotor (2.3) input and output shaft by bearing.
4. according to claim 2 or 3 described fixed-pitch direct-driving wind power generators, it is characterized in that: described generator permanent magnetism internal rotor (2.2) comprises support iron hoop (2.2.2), be embedded in the outer permanent magnetism (2.2.1) that supports iron hoop (2.2.2) outer surface, be embedded in the interior permanent magnetism (2.2.3) that supports iron hoop (2.2.2) internal surface.
CN2010201730371U 2010-04-27 2010-04-27 Fixed-propeller pitch and direct-drive wind power generating device Expired - Fee Related CN201687658U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201730371U CN201687658U (en) 2010-04-27 2010-04-27 Fixed-propeller pitch and direct-drive wind power generating device

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Application Number Priority Date Filing Date Title
CN2010201730371U CN201687658U (en) 2010-04-27 2010-04-27 Fixed-propeller pitch and direct-drive wind power generating device

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858309A (en) * 2010-04-27 2010-10-13 东南大学 Fixed-pitch direct-driving wind power generator
CN103939264A (en) * 2014-05-04 2014-07-23 钟群明 Water flow generator set
CN103944313A (en) * 2014-05-09 2014-07-23 北京良明同创水处理设备开发中心 Direct-coupled magnetic suspension fan
CN106640693A (en) * 2015-11-02 2017-05-10 北京良明宇航节能动力装备技术开发中心 Vertical type direct connection draught fan
CN111794906A (en) * 2020-08-14 2020-10-20 江西理工大学 Blade assembly, fixed-pitch wind driven generator and output power control method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858309A (en) * 2010-04-27 2010-10-13 东南大学 Fixed-pitch direct-driving wind power generator
CN103939264A (en) * 2014-05-04 2014-07-23 钟群明 Water flow generator set
CN103944313A (en) * 2014-05-09 2014-07-23 北京良明同创水处理设备开发中心 Direct-coupled magnetic suspension fan
CN106640693A (en) * 2015-11-02 2017-05-10 北京良明宇航节能动力装备技术开发中心 Vertical type direct connection draught fan
CN111794906A (en) * 2020-08-14 2020-10-20 江西理工大学 Blade assembly, fixed-pitch wind driven generator and output power control method thereof

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C17 Cessation of patent right
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Granted publication date: 20101229

Termination date: 20130427