CN102269123B - Wind power generation device - Google Patents
Wind power generation device Download PDFInfo
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- CN102269123B CN102269123B CN2011101718720A CN201110171872A CN102269123B CN 102269123 B CN102269123 B CN 102269123B CN 2011101718720 A CN2011101718720 A CN 2011101718720A CN 201110171872 A CN201110171872 A CN 201110171872A CN 102269123 B CN102269123 B CN 102269123B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/72—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously
- F16H3/727—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path
- F16H3/728—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion with a secondary drive, e.g. regulating motor, in order to vary speed continuously with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path with means to change ratio in the mechanical gearing
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
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Abstract
The invention discloses a wind power generation device. In the device, an output shaft (1) is used for rigidly connecting a planet carrier (22) of a first planet gear (2) and a planet carrier (32) of a second planet gear (3) with a wind machine (11); a rotor (42) of a first speed regulation motor (4) is rigidly connected with a sun gear (21) of the first planet gear (2); a rotor (52) of a second speed regulation motor (5) is rigidly connected with a sun gear (31) of the second planet gear (3); a locking device (7) is arranged between an outer gear ring (23) of the first planet gear (2) and a shell, and is closed to make the outer gear ring (23) fixed; a clutch (8) is arranged between the outer gear ring (23) of the first planet gear (2) and the sun gear (31) of the second planet gear (3), and is closed to make the outer gear ring (23) and the sun gear (31) synchronously rotated; and an outer gear ring (33) of the second planet gear (3) is rigidly connected with a rotor (62) of a generator (6).
Description
Technical field
The present invention relates to wind power plant, particularly realize becoming the equipment of wind speed input constant frequency rate output in wind-power generating system.
Background technique
Along with the concern of the whole society to the energy and environmental problem, the development and utilization of renewable energy sources is just presenting the trend of accelerated development, and wind energy is extensively to exist in the world and is the technology grasped of people one of the renewable energy sources of maturation the most.The wind-power generating system of main flow is double feedback electric engine and straight drive system at present, the stator of doubly-fed generation system directly is connected with electrical network, realize speed governing by the slip power of regulating in the rotor winding, therefore the rotor winding needs a powerful inverter power supply of cover, epitrochanterian slip ring of while and brush reliability and life-span are not high, need periodic maintenance; Straight drive system has been cancelled the raising speed gear of wind energy conversion system to generator, but it is low directly to drive the generator working speed, and generator need to adopt larger rotor diameter and more number of pole-pairs, has increased difficulty for the Design and manufacture of generator.Simultaneously because wind energy has randomness, suddenly big or suddenly small, when wind speed during less than rated wind speed, wind wheel can absorb wind energy to greatest extent, and when wind speed during higher than a certain limit value, in order to keep the generator output frequency constant, adopt adjusting fan blade pitch to make wind wheel stall, cause wind energy not to be fully utilized.In order to address the above problem, patent 200710019236.X, 200720033191.7,200810100747.9,200820116054.4 has proposed the wind power generating set of electric stepless speed change, with the wind energy transformation of velocity variations, is the mechanical energy of electric energy and the output of constant frequency rate by double-mechanical-port motor.But this electric machine structure is complicated, manufacturing is difficult, also has the maintenance issues of brush and slip ring simultaneously.Therefore efficient, reliable, the simple variable speed constant frequency rate wind generating unit of control is the long-term pursuits of these those skilled in the art, although patent 200910089259.7 has realized variable speed constant frequency, but when wind energy is very large or very little the time, the Capacity Ratio of speed-adjustable motor is larger, causes system bulk, cost to be difficult to descend.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, it is the wind generating unit of constant speed output that a kind of Conversion of Energy with the speed change input is provided.
Wind generating unit of the present invention comprises active stepless speed-regulating device, wind energy conversion system and generator.
Active stepless speed-regulating device of the present invention comprises at least: the first planetary pinion, the second planetary pinion, the first speed-adjustable motor, the second speed-adjustable motor, the first power inverter, the second power inverter, a locking engagement and a clutch, wherein planetary pinion comprises planet carrier, external toothing and sun gear, speed-adjustable motor comprises stator and rotor two-part, and the Ac that power inverter is variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to speed-adjustable motor.the first planetary planet carrier is rigidly connected by active stepless speed-regulating device one axle and the second planetary planet carrier, the rotor of the first speed-adjustable motor and the first planetary sun gear are rigidly connected, the rotor of the second speed-adjustable motor and the second planetary sun gear are rigidly connected, between the first planetary external toothing and casing, locking engagement is arranged, the locking engagement closure can make external toothing maintain static, between the first planetary external toothing and the second planetary sun gear, clutch is arranged, the clutch closure can make external toothing and the second planetary sun gear synchronous rotary of the first row star gear, the second planetary external toothing is as two axles of active stepless speed-regulating device.Regulate the first planetary sun gear and the second planetary sun gear rotating speed by controlling speed-adjustable motor, while reaching active stepless speed-regulating device one axle rotation speed change, the rotating speed operation that two axles of active stepless speed-regulating device remain on setting, realize stepless shift function.
Simultaneously, when setting rotating speed, locking engagement is closed when the rotating speed of active stepless speed-regulating device one axle, and clutch is opened, and active stepless speed-regulating device is operated in pattern one; When setting rotating speed, locking engagement is opened when the rotating speed of active stepless speed-regulating device one axle, and clutch is closed, and active stepless speed-regulating device is operated in pattern two; When the rotating speed of active stepless speed-regulating device one axle equals to set rotating speed, carry out locking engagement and clutch switch and change, be i.e. the switching of pattern one and pattern two; Two axles that can guarantee so active stepless speed-regulating device are always operating at fixing rotating speed, guarantee that simultaneously the speed-adjustable motor capacity is less.
When the rotor speed that pattern one occurs in the second speed-adjustable motor to the switching of pattern two is zero, namely when the rotating speed of active stepless speed-regulating device one axle when setting rotating speed, locking engagement is closed, clutch is opened, the rotating speed that active stepless speed-regulating device is operated in pattern one, the second speed-adjustable motor is negative value; Along with the rotating speed increase of active stepless speed-regulating device one axle, when the rotating speed of active stepless speed-regulating device one axle equaled to set rotating speed, the rotating speed of the second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch, opened locking engagement; The rotating speed of active stepless speed-regulating device one axle continues to increase, and when setting rotating speed, active stepless speed-regulating device is operated in pattern two when the rotating speed of active stepless speed-regulating device one axle.
The present invention, by continuous control speed-adjustable motor rotating speed, realizes stepless speed regulation, and because speed-adjustable motor can be to this device input or output energy, therefore, system is active stepless speed-regulating device.
Wind generating unit of the present invention comprises at least one wind energy conversion system, two planetary pinions: the first planetary pinion, the second planetary pinion; Two speed-adjustable motors: the first speed-adjustable motor, the second speed-adjustable motor; Two power inverters: the first power inverter, the second power inverter; A generator, a locking engagement and a clutch.the first planetary planet carrier is rigidly connected by active stepless speed-regulating device one axle and the second planetary planet carrier and wind energy conversion system, the rotor of the first speed-adjustable motor and the first planetary sun gear are rigidly connected, the rotor of the second speed-adjustable motor and the second planetary sun gear are rigidly connected, between the first planetary external toothing and casing, locking engagement is arranged, the locking engagement closure can make the external toothing of the first row star gear maintain static, between the first planetary external toothing and the second planetary sun gear, clutch is arranged, the clutch closure can make external toothing and the second planetary sun gear synchronous rotary of the first row star gear, the rotor of the second planetary external toothing and generator is rigidly connected, the staor winding of generator directly is connected with electrical network.The first speed-adjustable motor is connected with electrical network by the first power inverter, and the second speed-adjustable motor is connected with electrical network by the second power inverter, and the Ac that power inverter is variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the speed-adjustable motor staor winding respectively.
Simultaneously also have signaling line to be connected between power inverter and speed-adjustable motor, can carry out communication.
Speed-adjustable motor and generator can be the motor of magneto, asynchronous motor or other types as required.
Wind generating unit of the present invention, when setting rotating speed, locking engagement is closed when the rotating speed of wind energy conversion system, and clutch is opened, and wind generating unit is operated in pattern one; When setting rotating speed, locking engagement is opened when the rotating speed of wind energy conversion system, and clutch is closed, and wind generating unit is operated in pattern two; When the rotating speed of wind energy conversion system equals to set rotating speed, carry out locking engagement and clutch switch and change, be i.e. the switching of pattern one and pattern two; Can guarantee that like this generator is always operating at fixing rotating speed, guarantee simultaneously the stationarity of handoff procedure.When the rotor speed that pattern one occurs in the second speed-adjustable motor to the switching of pattern two is zero, namely when the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is negative value; Along with the rotating speed increase of wind energy conversion system, when the rotating speed of wind energy conversion system equaled to set rotating speed, the rotating speed of the second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch, opened locking engagement; The rotating speed of wind energy conversion system continues to increase, and when setting rotating speed, wind generating unit is operated in pattern two when the rotating speed of wind energy conversion system.
Device of the present invention is operated in pattern for the moment, part wind energy is delivered on the first planetary planet carrier by wind energy conversion system, the driving planet carrier rotates, because locking engagement is closed, therefore the first planetary external toothing maintains static, and the energy on planet carrier all is delivered to the first planetary sun gear, drives the first speed-adjustable motor generating, generate electricity and can be converted to the phase place Ac identical with voltage and electrical network by the first power inverter, feedback grid.The second speed-adjustable motor is by the information such as rotating speed of sensor measurement motor, feed back to the second power inverter by signaling line, the information that the second power inverter is set rotating speed and feedback rotating speed according to the second speed-adjustable motor provides the Ac of different frequency and voltage to the staor winding of the second speed-adjustable motor, control the second speed-adjustable motor according to setting the rotating speed operation,, by adjusting the second speed-adjustable motor rotating speed, guarantee the generator working speed of the invariablenes turning speed of the second planetary external toothing in setting.At this moment, another part wind energy of wind energy conversion system is delivered to planetary external toothing by the second planetary planet carrier, be converted into electric energy by generator, be input to electrical network, the remainder energy is delivered to the second speed-adjustable motor by sun gear, is converted to the phase place Ac identical with voltage and electrical network by the second power inverter and is input to electrical network.
When device of the present invention is operated in pattern two, part wind energy is delivered on the first planetary planet carrier by wind energy conversion system, the driving planet carrier rotates, due to clutch closure this moment, so the first planetary external toothing and the second planetary sun gear synchronous rotary, an energy part on planet carrier is delivered to the first planetary sun gear, drive the first speed-adjustable motor generating, generate electricity and can be converted to the phase place Ac identical with voltage and electrical network by the first power inverter, feedback grid; Another part is delivered to the first planetary external toothing, drives the second speed-adjustable motor generating, generate electricity and can be converted to the phase place Ac identical with voltage and electrical network by the second power inverter, feedback grid.The second speed-adjustable motor is by the information such as rotating speed of sensor measurement motor, feed back to the second power inverter by signaling line, the information that the second power inverter is set rotating speed and feedback rotating speed according to the second speed-adjustable motor provides the Ac of different frequency and voltage to the staor winding of the second speed-adjustable motor, control the second speed-adjustable motor according to setting the rotating speed operation,, by adjusting the second speed-adjustable motor rotating speed, guarantee the generator working speed of the invariablenes turning speed of the second planetary external toothing in setting.At this moment, the remainder wind energy of wind energy conversion system is delivered to planetary external toothing by the second planetary planet carrier, be converted into electric energy by generator, be input to electrical network, the remainder energy is delivered to the second speed-adjustable motor by sun gear, is converted to the phase place Ac identical with voltage and electrical network by the second power inverter and is input to electrical network.
Simultaneously, wind energy conversion system can be connected with the first planetary planet carrier by speed change gear, the first speed-adjustable motor can be connected with the first planetary sun gear by speed change gear, the second speed-adjustable motor can be connected with the second planetary sun gear by speed change gear, generator can be connected with the second planetary external toothing by speed change gear, to facilitate Machine Design and design of electrical motor, improve simultaneously the rotating speed of motor, reduce volume and cost.
The present invention can also have another kind of structural type: wind generating unit of the present invention comprises at least one wind energy conversion system, three planetary pinions: the first planetary pinion, the second planetary pinion, third planet gear; Two speed-adjustable motors: the first speed-adjustable motor, the second speed-adjustable motor; Two power inverters: the first power inverter, the second power inverter; A generator, a locking engagement and a clutch.the planet carrier of wind energy conversion system and third planet gear is rigidly connected, the first planetary planet carrier and the second planetary planet carrier are rigidly connected, the rotor of the first speed-adjustable motor, the sun gear of the first planetary sun gear and third planet gear is rigidly connected, the rotor of the second speed-adjustable motor, the second planetary sun gear and the first planetary external toothing are rigidly connected, between the external toothing of third planet gear and the casing of described wind generating unit, locking engagement is arranged, the locking engagement closure can make the external toothing of third planet gear maintain static, between the planet carrier of the second planetary planet carrier and third planet gear, clutch is arranged, the clutch closure can make the planet carrier of the first row star gear, the second planetary planet carrier, the planet carrier synchronous rotary of third planet gear, the rotor of the second planetary external toothing and generator is rigidly connected, the staor winding of generator directly is connected with electrical network.The first speed-adjustable motor is connected with electrical network by the first power inverter, and the second speed-adjustable motor is connected with electrical network by the second power inverter, and the Ac that power inverter is variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the speed-adjustable motor staor winding respectively.
Simultaneously also have signaling line to be connected between power inverter and speed-adjustable motor, can carry out communication.Speed-adjustable motor and generator can be the motor of magneto, asynchronous motor or other types as required.
Wind generating unit of the present invention, when setting rotating speed, locking engagement is closed when the rotating speed of wind energy conversion system, and clutch is opened, and wind generating unit is operated in pattern one; When setting rotating speed, locking engagement is opened when the rotating speed of wind energy conversion system, and clutch is closed, and wind generating unit is operated in pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, this moment, the rotor speed of the second speed-adjustable motor was zero, and locking engagement is closed, and clutch is opened, and pattern one is to pattern two switchings; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, and clutch is closed, and pattern two is to pattern one switching; Can guarantee that like this generator is always operating at fixing rotating speed, guarantee simultaneously the stationarity of handoff procedure.As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select as required the switch mode of wind generating unit.When the rotor speed that pattern one occurs in the second speed-adjustable motor to the switching of pattern two is zero, namely when the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is negative value; Along with the rotating speed increase of wind energy conversion system, when the rotating speed of wind energy conversion system equaled to set rotating speed, the rotating speed of the second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch, opened locking engagement; The rotating speed of wind energy conversion system continues to increase, and when setting rotating speed, wind generating unit is operated in pattern two when the rotating speed of wind energy conversion system.
The third structural type of the present invention is: wind generating unit of the present invention comprises at least one wind energy conversion system, three planetary pinions: the first planetary pinion, the second planetary pinion, third planet gear; Two speed-adjustable motors: the first speed-adjustable motor, the second speed-adjustable motor; Two power inverters: the first power inverter, the second power inverter; A generator, a locking engagement and a clutch.The planet carrier of wind energy conversion system and third planet gear is rigidly connected, and the rotor of the first planetary planet carrier and generator is rigidly connected, and the staor winding of generator directly is connected with electrical network.the rotor of the first speed-adjustable motor, the first planetary sun gear, the second planetary sun gear, the sun gear of third planet gear is rigidly connected, the rotor of the second speed-adjustable motor and the second planetary external toothing are rigidly connected, between the external toothing of third planet gear and the casing of described wind generating unit, locking engagement is arranged, the locking engagement closure can make the external toothing of third planet gear maintain static, linking together of the second planetary planet carrier and the first planetary external toothing rigidity, between the planet carrier of the second planetary planet carrier and third planet gear, clutch is arranged, the clutch closure can make the second planetary planet carrier, the planet carrier of third planet gear and wind energy conversion system synchronous rotary.The first speed-adjustable motor is connected with electrical network by the first power inverter, and the second speed-adjustable motor is connected with electrical network by the second power inverter, and the Ac that power inverter is variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the speed-adjustable motor staor winding respectively.
Simultaneously also have signaling line to be connected between power inverter and speed-adjustable motor, can carry out communication.Speed-adjustable motor and generator can be the motor of magneto, asynchronous motor or other types as required.
Wind generating unit of the present invention, when setting rotating speed, locking engagement is closed when the rotating speed of wind energy conversion system, and clutch is opened, and wind generating unit is operated in pattern one; When setting rotating speed, locking engagement is opened when the rotating speed of wind energy conversion system, and clutch is closed, and wind generating unit is operated in pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, this moment, the rotor speed of the second speed-adjustable motor was zero, and locking engagement is closed, and clutch is opened, and pattern one is to pattern two switchings; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, and clutch is closed, and pattern two is to pattern one switching; As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select as required the switch mode of wind generating unit.Can guarantee that like this generator is always operating at fixing rotating speed, guarantee simultaneously the stationarity of handoff procedure.When the rotor speed that pattern one occurs in the second speed-adjustable motor to the switching of pattern two is zero, namely when the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is negative value; Along with the rotating speed increase of wind energy conversion system, when the rotating speed of wind energy conversion system equaled to set rotating speed, the rotating speed of the second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch, opened locking engagement; The rotating speed of wind energy conversion system continues to increase, and when setting rotating speed, wind generating unit is operated in pattern two when the rotating speed of wind energy conversion system.
The 4th kind of structural type of the present invention is: wind generating unit of the present invention comprises at least one wind energy conversion system, three planetary pinions: the first planetary pinion, the second planetary pinion, third planet gear; Two speed-adjustable motors: the first speed-adjustable motor, the second speed-adjustable motor; Two power inverters: the first power inverter, the second power inverter; A generator, a locking engagement and a clutch.The planet carrier of wind energy conversion system and third planet gear is rigidly connected, and the first planetary planet carrier, the second planetary external toothing and generator amature are rigidly connected, and the staor winding of generator directly is connected with electrical network.the rotor of the first speed-adjustable motor, the sun gear of the first planetary sun gear and third planet gear is rigidly connected, the rotor of the second speed-adjustable motor, the second planetary sun gear is rigidly connected, between the external toothing of third planet gear and the casing of described wind generating unit, locking engagement is arranged, the locking engagement closure can make the external toothing of third planet gear maintain static, the second planetary planet carrier and the first planetary external toothing are rigidly connected, between the planet carrier of the second planetary planet carrier and third planet gear, clutch is arranged, the clutch closure can make the external toothing of the first row star gear, the second planetary planet carrier, the planet carrier synchronous rotary of third planet gear.The first speed-adjustable motor is connected with electrical network by the first power inverter, and the second speed-adjustable motor is connected with electrical network by the second power inverter, and the Ac that power inverter is variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the speed-adjustable motor staor winding respectively.
Simultaneously also have signaling line to be connected between power inverter and speed-adjustable motor, can carry out communication.Speed-adjustable motor and generator can be the motor of magneto, asynchronous motor or other types as required.
Wind generating unit of the present invention, when setting rotating speed, locking engagement is closed when the rotating speed of wind energy conversion system, and clutch is opened, and wind generating unit is operated in pattern one; When setting rotating speed, locking engagement is opened when the rotating speed of wind energy conversion system, and clutch is closed, and wind generating unit is operated in pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, this moment, the rotor speed of the second speed-adjustable motor was zero, and locking engagement is closed, and clutch is opened, and pattern one is to pattern two switchings; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, and clutch is closed, and pattern two is to pattern one switching; As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select as required the switch mode of wind generating unit.Can guarantee that like this generator is always operating at fixing rotating speed, guarantee simultaneously the stationarity of handoff procedure.When the rotor speed that pattern one occurs in the second speed-adjustable motor to the switching of pattern two is zero, namely when the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is negative value; Along with the rotating speed increase of wind energy conversion system, when the rotating speed of wind energy conversion system equaled to set rotating speed, the rotating speed of the second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch, opened locking engagement; The rotating speed of wind energy conversion system continues to increase, and when setting rotating speed, wind generating unit is operated in pattern two when the rotating speed of wind energy conversion system.
Above-mentioned wind generating unit of the present invention has improvement project one, scheme two and is connected with scheme and can adopts gear graduation equally when wind energy conversion system, the first speed-adjustable motor, the second speed-adjustable motor are connected with this device with generator, improve, make the volume of wind generating unit less, cost is lower.
To provide device of the present invention be mainly two patterns above-mentioned, on the basis of two above-mentioned mode devices, and by combination, can the planet three-mode, the integrated schemes such as four-mode and multi-mode, describe no longer one by one here.
Beneficial effect of the present invention:
1, compare with traditional double feedback electric engine system, the present invention has simplified the structure of wind power generating set, has saved brush and slip-ring device, has improved reliability and maintainability.
2, the control by speed-adjustable motor can make generator at fixing rotary speed working, realizes the variable speed constant frequency operation, can take full advantage of the mature technology of constant frequency generation.
3, compare with directly driving generator system, in apparatus of the present invention, electric energy is produced by conventional generator, is directly inputted to electrical network, and without power electronic equipment, the quality of power supply is good.
4, can be used as starting motor, wind wheel is started and brakes.
5, effectively reduced the capacity of speed-adjustable motor.
6, planetary pinion has the raising speed effect, rotating speed can be promoted, and reduces torque, thereby reduces the volume of generator.
Description of drawings
Fig. 1 is the structural representation of the wind generating unit of the first exemplary embodiment according to the present invention;
In figure: active stepless speed-regulating device one axle 1, active stepless speed-regulating device two axle 100, the first planetary pinion 2, the second planetary pinions 3, the first speed-adjustable motor 4, the second speed-adjustable motor 5, the first power inverter 9, the second power inverters 10, locking engagement 7, clutch 8, electrical network 12; The first planetary planet carrier 22, external toothing 23, sun gear 21; The second planetary planet carrier 32, external toothing 33, sun gear 31; The rotor 42 of the first speed-adjustable motor, stator 41; The rotor 52 of the second speed-adjustable motor, stator 51;
The structural representation of the active stepless speed-regulating device in Fig. 2 first embodiment of the invention;
In figure: wind energy conversion system 11, generator 6, the rotor 62 of generator, stator 61;
Fig. 3 is the structural representation of the wind generating unit with gear graduation of modification on the basis according to first embodiment of the invention;
In figure: first stud gear 13, second stud gear 14, the 3rd speed change gear 15 and the 4th speed change gear 16;
The structural representation of the wind generating unit of Fig. 4 second embodiment of the invention;
In figure: third planet gear 20, wherein sun gear 201, planet carrier 202, external toothing 203;
The structural representation of the wind generating unit of Fig. 5 third embodiment of the invention;
The structural representation of the wind generating unit of Fig. 6 fourth embodiment of the invention.
Embodiment
Wind generating unit of the present invention comprises active stepless speed-regulating device, wind energy conversion system and generator.Below, describe by reference to the accompanying drawings the wind generating unit according to the embodiment of the present invention in detail.
Fig. 1 is the structural representation of the wind generating unit of first embodiment of the invention.Fig. 2 is the structural representation of the active stepless speed-regulating device in the wind generating unit of first embodiment of the invention.
As shown in Figure 1, wind generating unit comprises active stepless speed-regulating device 1000, wind energy conversion system 11 and generator 6.Wind energy conversion system 11 is connected to an axle 1 of active stepless speed-regulating device 1000, and generator 6 is connected to two axles 100 of active stepless speed-regulating device 1000.Wind energy conversion system 11 rotates under the wind-force effect, convert wind energy to mechanical energy, is delivered to active stepless speed-regulating device 1000, and active stepless speed-regulating device 1000 is translated into the mechanical energy of constant speed, is delivered to generator 6, and generator 6 feeds back to electrical network 12 with electric energy.
As depicted in figs. 1 and 2, active stepless speed-regulating device 1000 comprises two planetary pinions: the first planetary pinion 2 and the second planetary pinion 3; Two speed-adjustable motors: the first speed-adjustable motor 4 and the second speed-adjustable motor 5; Two power inverters: the first power inverter 9 and the second power inverter 10; A locking engagement 7 and a clutch 8.the planet carrier 22 of the first planetary pinion 2 is rigidly connected by the planet carrier 32 of active stepless speed-regulating device one axle 1 and the second planetary pinion 3, the rotor 42 of the first speed-adjustable motor 4 and the sun gear 21 of the first planetary pinion 2 are rigidly connected, the rotor 52 of the second speed-adjustable motor 5 and the sun gear 31 of the second planetary pinion 3 are rigidly connected, between the external toothing 23 of the first planetary pinion 2 and the casing of described wind generating unit, locking engagement 7 is arranged, locking engagement 7 closures can make the external toothing 23 of the first row star gear 2 maintain static, between the external toothing 23 of the first planetary pinion 2 and the sun gear 31 of the second planetary pinion 3, clutch 8 is arranged, clutch 8 closures can make the external toothing 23 of the first row star gear 2 and sun gear 31 synchronous rotaries of the second planetary pinion 3, the external toothing 33 of the second planetary pinion 3 is rigidly connected with two axles 100 of active stepless speed-regulating device.The first power inverter 9 is connected the first speed-adjustable motor 4 with electrical network 12 or other power supplys, the second power inverter 10 is connected the second speed-adjustable motor 5 with electrical network 12 or other power supplys.
There is following relation for planetary pinion:
ω
s＝(1+ρ)×ω
c-ω
r/ρ
ω
c＝ρ×ω
s/(1+ρ)+ω
r/(1+ρ)
ω
r＝(1+ρ)×ω
c-ρ×ω
s
T
s＝ρ×T
c/(1+ρ)＝ρ×T
r (1)
T
r＝T
c/(1+ρ)
ρ=sun gear the number of teeth/gear ring number of teeth
In formula, ω
sIt is the rotating speed of sun gear; T
sIt is the torque of sun gear;
ω
rIt is the rotating speed of gear ring; T
rIt is the torque of external toothing;
ω
cIt is the rotating speed of planet carrier; T
cIt is the torque of planet carrier;
Can be found out by following formula (1), rotating speed between planetary sun gear, planet carrier and external toothing three has strict relation, this relation is relevant to the ratio ρ of the sun gear number of teeth and the external toothing number of teeth, when ρ determines, the external toothing of active stepless speed-regulating device, sun gear, three parts of planet carrier have 2 mechanical rotary freedoms, be that after in the external toothing, sun gear, planet carrier of active stepless speed-regulating device, the rotational speed of any 2 parts is determined, the speed of the 3rd parts is unique to be determined.
In the active stepless speed-regulating device of the present invention, there are two groups of planetary pinions, the first planetary pinion 2 and the second planetary pinion 3, all has above-mentioned relation, and the planet carrier 22 of the first planetary pinion 2 and the planet carrier 32 of the second planetary pinion 3 are rigidly connected, and when locking engagement 7 closures, clutch 8 is opened, this working state is pattern one, has following relation this moment:
In formula,
ω
m1It is the rotating speed of the first speed-adjustable motor 4;
ω
m2It is the rotating speed of the second speed-adjustable motor 5;
ω
1It is the rotating speed of active stepless speed changes devices one axle 1;
ω
100It is the rotating speed of active stepless speed changes devices two axles 100;
ρ
1The first planetary sun gear number of teeth and external toothing number of teeth ratio;
ρ
2The second planetary sun gear number of teeth and external toothing number of teeth ratio.
Can find out the rotational speed omega of active stepless speed changes devices one axle 1 according to formula (2)
1While changing, by adjusting the rotational speed omega of the second speed-adjustable motor 5
m2Can guarantee the rotational speed omega of active stepless speed changes devices two axles 100
100Remain unchanged, realize stepless speed regulation.But, under this pattern, when the rotational speed omega of active stepless speed changes devices one axle 1
1When very high, adjust the rotational speed omega of the second speed-adjustable motor 5
m2Can be very high, the capacity that causes adjusting the second speed-adjustable motor 5 and the second power inverter 10 is larger, causes that system bulk is large, cost is high.Therefore, set model speed-changing ω
12, when the rotational speed omega of active stepless speed changes devices one axle 1
1＜ω
12The time, active stepless speed changes devices adopts above-mentioned mode of operation one, and works as the rotational speed omega of active stepless speed changes devices one axle 1
1＞ω
12The time, locking engagement 7 is opened, clutch 8 closures, and this working state is called pattern two, has following relation this moment:
Can see, the first speed-adjustable motor 4 has participated in speed governing work, has shared a part of power stage, has reduced the capacity of the second speed-adjustable motor 5 and the second power inverter 10.
Therefore, wind generating unit of the present invention can be controlled the ratio of active stepless speed changes devices one axle 1 and active stepless speed changes devices two axles 100 by regulating the speed of the second speed-adjustable motor 5, and the variation that this ratio can be continuous, namely realizes stepless speed regulation.On the other hand, according to the difference of operating mode, adopt two kinds of mode of operations, effectively reduced the capacity of speed-adjustable motor.
As shown in Figure 1, described wind generating unit comprises an above-mentioned active stepless speed-regulating device, wherein, wind energy conversion system 11 is rigidly connected with active stepless speed-regulating device one axle 1, rotor 62 and active stepless speed-regulating device two axles 100 of generator 6 are rigidly connected, and stator 61 windings of generator 6 directly are connected with electrical network 12.
In work, when the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 closures, clutch 8 is opened, wind generating unit of the present invention is operated in pattern one; When setting rotating speed, locking engagement 7 is opened when the rotating speed of wind energy conversion system 11, clutch 8 closures, and described wind generating unit is operated in pattern two; Can guarantee that like this generator 6 is always operating at constant rotating speed, guarantee simultaneously the stationarity of handoff procedure.
When rotor 52 rotating speeds that pattern one occurs in the second speed-adjustable motor 5 to the switching of pattern two are zero, namely when the rotating speed of wind energy conversion system when setting rotating speed, locking engagement closure 7, clutch 8 is opened, the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor 5 is negative value; Along with the rotating speed increase of wind energy conversion system 11, when the rotating speed of wind energy conversion system 11 equaled to set rotating speed, the rotating speed of the second speed-adjustable motor 5 was reduced to zero gradually, and this moment, closed clutch 8, opened locking engagement 7; The rotating speed of wind energy conversion system 11 continues to increase, and when setting rotating speed, described wind generating unit is operated in pattern two when the rotating speed of wind energy conversion system 11.Can carry out as required equally the switching of pattern two to pattern one.
In Fig. 1, wind generating unit of the present invention is operated in pattern for the moment, part wind energy is delivered on the planet carrier 22 of the first planetary pinion 2 by wind energy conversion system 11, driving planet carrier 22 rotates, due to locking engagement 7 closures, therefore the external toothing 23 of the first planetary pinion 2 maintains static, energy on planet carrier 22 all is delivered to the sun gear 21 of the first planetary pinion 2, drive the first speed-adjustable motor 4 generatings, generate electricity and can be converted to the phase place Ac identical with electrical network 12 with voltage by the first power inverter 9, feed back to electrical network 12.The second speed-adjustable motor 5 is by information such as sensor measurement motor 5 rotating speeds, feed back to the second power inverter 10 by signaling line, the information that the second power inverter 10 is set rotating speed and feedback rotating speed according to the second speed-adjustable motor 5 provides the Ac of different frequency and voltage to stator 51 windings of the second speed-adjustable motor 5, control the second speed-adjustable motor 5 according to setting the rotating speed operation, by adjusting the rotating speed of the second speed-adjustable motor 5, generator 6 working speeds that the invariablenes turning speed of the external toothing 33 of assurance the second planetary pinion 3 is being set.At this moment, another part wind energy of wind energy conversion system 11 is delivered to the external toothing 33 of planetary pinion 3 by the planet carrier 32 of the second planetary pinion 3, be converted into electric energy by generator 6, be input to electrical network 12, the remainder energy is delivered to the second speed-adjustable motor 5 by sun gear 31, is converted to the phase place Ac identical with electrical network 12 with voltage by the second power inverter 10 and is input to electrical network 12.
When wind generating unit of the present invention is operated in pattern two, part wind energy is delivered on the planet carrier 22 of the first planetary pinion 2 by wind energy conversion system 11, driving planet carrier 22 rotates, due to clutch 8 closures this moment, so the external toothing 23 of the first planetary pinion 2 and sun gear 31 synchronous rotaries of the second planetary pinion 3, an energy part on planet carrier 22 is delivered to the sun gear 21 of the first planetary pinion 2, drive the first speed-adjustable motor 4 generatings, generate electricity and can be converted to the phase place Ac identical with electrical network 12 with voltage by the first power inverter 9, feed back to electrical network 12; Another part is delivered to the external toothing 23 of the first planetary pinion 2, drives the second speed-adjustable motor 5 generatings, generate electricity and can be converted to the phase place Ac identical with electrical network 12 with voltage by the second power inverter 10, feed back to electrical network 12.The second speed-adjustable motor 5 is by the information such as rotating speed of sensor measurement motor 5, feed back to the second power inverter 10 by signaling line, the information that the second power inverter 10 is set rotating speed and feedback rotating speed according to the second speed-adjustable motor 5 provides the Ac of different frequency and voltage to stator 51 windings of the second speed-adjustable motor 5, control the second speed-adjustable motor 5 according to setting the rotating speed operation, by adjusting the second speed-adjustable motor 5 rotating speeds, generator 6 working speeds that the invariablenes turning speed of the external toothing 33 of assurance the second planetary pinion 3 is being set.At this moment, the remainder wind energy of wind energy conversion system 11 is delivered to the external toothing 33 of planetary pinion 3 by the planet carrier 32 of the second planetary pinion 3, be converted into electric energy by generator 6, be input to electrical network 12, the remainder energy is delivered to the second speed-adjustable motor 5 by sun gear 31, is converted to the phase place Ac identical with electrical network 12 with voltage by the second power inverter 10 and is input to electrical network 12.
Fig. 3 is the modified example after the wind generating unit in Fig. 1 increases gear graduation.As shown in Figure 3, wind energy conversion system 11 is connected with the planet carrier 22 of the first planetary pinion 2 by speed change gear 13, the first speed-adjustable motor 4 by speed change gear 14 be connected with the sun gear 21 of the first planetary pinion 2, the second speed-adjustable motor 5 by speed change gear 15 be connected with the sun gear 31 of the second planetary pinion 3, generator 6 is connected with the external toothing 33 of the second planetary pinion 3 by speed change gear 16, to facilitate Machine Design and design of electrical motor, improve simultaneously the rotating speed of motor, reduce volume and cost.
Fig. 4 is the structural representation of the wind generating unit of second embodiment of the invention.As shown in the figure, the wind generating unit of second embodiment of the invention comprises at least one wind energy conversion system 11, three planetary pinions: the first planetary pinion 2, the second planetary pinion 3 and third planet gear 20, two speed-adjustable motors: the first speed-adjustable motor 4 and the second speed-adjustable motor 5, two power inverters: the first power inverter 9 and 6, one locking engagements 7 of 10, one generators of the second power inverter and a clutch 8.wind energy conversion system 11 is rigidly connected with the planet carrier 202 of third planet gear 20, the planet carrier 22 of the first planetary pinion 2 and the planet carrier 32 of the second planetary pinion 3 are rigidly connected, the rotor 42 of the first speed-adjustable motor 4, the sun gear 21 of the first planetary pinion 2 and the sun gear 201 of third planet gear 20 are rigidly connected, the rotor 52 of the second speed-adjustable motor 5, the sun gear 31 of the second planetary pinion 3 and the external toothing 23 of the first planetary pinion 2 are rigidly connected, between the external toothing 203 of third planet gear 20 and the casing of described wind generating unit, locking engagement 7 is arranged, locking engagement 7 closures can make the external toothing 203 of third planet gear 20 maintain static, between the planet carrier 32 of the second planetary pinion 3 and the planet carrier 202 of third planet gear 20, clutch 8 is arranged, clutch 8 closures can make the planet carrier 22 of the first row star gear 2, the planet carrier 32 of the second planetary pinion 3, planet carrier 202 synchronous rotaries of third planet gear 20, the external toothing 33 of the second planetary pinion 3 is rigidly connected with the rotor 62 of generator 6, stator 61 windings of generator 6 directly are connected with electrical network 12.The first power inverter 9 is connected the first speed-adjustable motor 4 with electrical network 12, the second power inverter 10 is connected the second speed-adjustable motor 5 with electrical network 12, the Ac that the first power inverter 9 and the second power inverter 10 are variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the staor winding of the first speed-adjustable motor 4 and the second speed-adjustable motor 5 respectively, the first power inverter 9 and the second power inverter 10 also have signaling line to be connected respectively with between the first speed-adjustable motor 4 and the second speed-adjustable motor 5 simultaneously, can carry out communication.The first speed-adjustable motor 4 and the second speed-adjustable motor 5 and generator 6 can be the motor of magneto, asynchronous motor or other types as required.
When the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 closures, clutch 8 is opened, wind generating unit is operated in pattern one; When setting rotating speed, locking engagement 7 is opened when the rotating speed of wind energy conversion system 11, clutch 8 closures, and described wind generating unit is operated in pattern two; Can guarantee that like this generator 6 is always operating at fixing rotating speed.Rotor 52 rotating speeds at the second speed-adjustable motor 5 are zero, namely carry out the switching between pattern one and pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
similar with the first embodiment, also can increase speed change gear, namely, wind energy conversion system 11 can be connected with the planet carrier 202 of third planet gear 20 by speed change gear, the first speed-adjustable motor 4 can be connected with the sun gear 21 of the first planetary pinion 2 by speed change gear, the second speed-adjustable motor 5 can be connected with the sun gear 31 of the second planetary pinion 3 by speed change gear, generator 6 can be connected with the external toothing 33 of the second planetary pinion 3 by speed change gear, to facilitate Machine Design and design of electrical motor, improve simultaneously the rotating speed of motor, reduce volume and cost.
Fig. 5 is the structural representation of the wind generating unit of the 3rd exemplary embodiment according to the present invention.As shown in Figure 5, the wind generating unit of third embodiment of the invention comprises at least one wind energy conversion system 11, three planetary pinions: the first planetary pinion 2, the second planetary pinion 3 and third planet gear 20, two speed-adjustable motors: the first speed-adjustable motor 4 and the second speed-adjustable motor 5, two power inverters: the first power inverter 9 and 6, one locking engagements 7 of 10, one generators of the second power inverter and a clutch 8.Wind energy conversion system 11 is rigidly connected with the planet carrier 202 of third planet gear 20, and the planet carrier 22 of the first planetary pinion 2 and the rotor 62 of generator 6 are rigidly connected, and stator 61 windings of generator 6 directly are connected with electrical network 12.the rotor 42 of the first speed-adjustable motor 4, the sun gear 21 of the first planetary pinion 2, the sun gear 31 of the second planetary pinion 3, the sun gear 201 of third planet gear 20 is rigidly connected, the rotor 52 of the second speed-adjustable motor 5 and the external toothing 33 of the second planetary pinion 3 are rigidly connected, between the external toothing 203 of third planet gear 20 and the casing of described wind generating unit, locking engagement 7 is arranged, locking engagement 7 closures can make the external toothing 203 of third planet gear 20 maintain static, linking together of external toothing 23 rigidity of the planet carrier of the second planetary pinion 3 (32) and the first planetary pinion 2, between the planet carrier 32 of the second planetary pinion 3 and the planet carrier 202 of third planet gear 20, clutch 8 is arranged, clutch 8 closures can make the planet carrier 32 of the second planetary pinion 3, the planet carrier 202 of third planet gear 20 and wind energy conversion system 11 synchronous rotaries.The first speed-adjustable motor 4 is connected with electrical network 12 by the first power inverter 9, the second power inverter 10 is connected the second speed-adjustable motor 5 with electrical network 12, the Ac that the first power inverter 9 and the second power inverter 10 are variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the staor winding of the first speed-adjustable motor 4 and the second speed-adjustable motor 5 respectively, the first power inverter 9 and the second power inverter 10 also have signaling line to be connected respectively with between the first speed-adjustable motor 4 and the second speed-adjustable motor 5 simultaneously, can carry out communication.The first speed-adjustable motor 4 and the second speed-adjustable motor 5 and generator 6 can be the motor of magneto, asynchronous motor or other types as required.
The wind generating unit of the present invention's the 3rd exemplary embodiment, when the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 closures, clutch 8 is opened, wind generating unit is operated in pattern one; When setting rotating speed, locking engagement 7 is opened when the rotating speed of wind energy conversion system 11, clutch 8 closures, and wind generating unit is operated in pattern two; Can guarantee that like this generator 6 is always operating at fixing rotating speed.Rotor 52 rotating speeds at the second speed-adjustable motor 5 are zero, carry out the switching between pattern one and pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
similar with the first embodiment, also can increase speed change gear, namely, wind energy conversion system 11 can be connected with the planet carrier 202 of third planet gear 20 by speed change gear, the first speed-adjustable motor 4 can be connected with the sun gear 21 of the first planetary pinion 2 by speed change gear, the second speed-adjustable motor 5 can be connected with the external toothing 33 of the second planetary pinion 3 by speed change gear, generator 6 can be connected with the planet carrier 22 of the first planetary pinion 2 by speed change gear, to facilitate Machine Design and design of electrical motor, improve simultaneously the rotating speed of motor, reduce volume and cost.
Fig. 6 is the structural representation of the wind generating unit of the present invention's the 4th exemplary embodiment.As shown in Figure 6, the wind generating unit of fourth embodiment of the invention comprises at least one wind energy conversion system 11, three planetary pinions: the first planetary pinion 2, the second planetary pinion 3, with 20, two speed-adjustable motors of third planet gear: the first speed-adjustable motor 4 and 5, two power inverters of the second speed-adjustable motor: the first power inverter 9 and the second power inverter 10,6, one locking engagements 7 of a generator and a clutch 8.Wind energy conversion system 11 is rigidly connected with the planet carrier 202 of third planet gear 20, and the planet carrier 22 of the first planetary pinion 2, the external toothing 33 of the second planetary pinion 3 and generator 6 rotors 62 are rigidly connected, and stator 61 windings of generator 6 directly are connected with electrical network 12.the rotor 42 of the first speed-adjustable motor 4, the sun gear 21 of the first planetary pinion 2 and the sun gear 201 of third planet gear 20 are rigidly connected, the rotor 52 of the second speed-adjustable motor 5, the sun gear 31 of the second planetary pinion 3 is rigidly connected, between the external toothing 203 of third planet gear 20 and the casing of described wind generating unit, locking engagement 7 is arranged, locking engagement 7 closures can make the external toothing 203 of third planet gear 20 maintain static, the planet carrier 32 of the second planetary pinion 3 and the external toothing 23 of the first planetary pinion 2 are rigidly connected, between the planet carrier 32 of the second planetary pinion 3 and the planet carrier 202 of third planet gear 20, clutch 8 is arranged, clutch 8 closures can make the external toothing 23 of the first row star gear 2, the planet carrier 32 of the second planetary pinion 3, planet carrier 202 synchronous rotaries of third planet gear 20.The first power inverter 9 is connected the first speed-adjustable motor 4 with electrical network 12, the second power inverter 10 is connected the second speed-adjustable motor 5 with electrical network 12, the Ac that the first power inverter 9 and the second power inverter 10 are variable voltage variable frequency with the transformation of electrical energy of electrical network is powered to the staor winding of the first speed-adjustable motor 4 and the second speed-adjustable motor 5 respectively, the first power inverter 9 and the second power inverter 10 also have signaling line to be connected respectively with between the first speed-adjustable motor 4 and the second speed-adjustable motor 5 simultaneously, can carry out communication.The first speed-adjustable motor 4 and the second speed-adjustable motor 5 and generator 6 can be the motor of magneto, asynchronous motor or other types as required.
Wind generating unit described according to fourth embodiment of the invention, when the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 closures, clutch 8 is opened, wind generating unit is operated in pattern one; When setting rotating speed, locking engagement 7 is opened when the rotating speed of wind energy conversion system 11, clutch 8 closures, and wind generating unit is operated in pattern two; Can guarantee that like this generator 6 is always operating at fixing rotating speed.Rotor 52 rotating speeds at the second speed-adjustable motor 5 are zero, carry out the switching between pattern one and pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
similar with the first embodiment, also can increase speed change gear, namely, wind energy conversion system 11 can be connected with the planet carrier 202 of third planet gear 20 by speed change gear, the first speed-adjustable motor 4 can be connected with the sun gear 21 of the first planetary pinion 2 by speed change gear, the second speed-adjustable motor 5 can be connected with the sun gear 31 of the second planetary pinion 3 by speed change gear, generator 6 can be connected with the external toothing 33 of the second planetary pinion 3 by speed change gear, to facilitate Machine Design and design of electrical motor, improve simultaneously the rotating speed of motor, reduce volume and cost.
To provide device of the present invention be mainly two patterns above-mentioned, on the basis of two above-mentioned mode devices,, by combination, can form the integrated schemes such as three-mode, four-mode and multi-mode, describes no longer one by one here.
in the prior art of wind-power electricity generation, direct driving motor is a kind of motor of variable working condition, be operated in different operation points according to varying in size of wind speed, the generator operating mode is complicated, being difficult to guarantee has higher efficiency under all operating modes, the present invention becomes the output of the wind energy conversion system of variable working condition the mechanical energy of a constant rotational speed output by the stepless speed-regulating device that planetary pinion and speed-adjustable motor form, can utilize existing permanent operating mode generator techniques, as heat generating and hydraulic generator technology, technology maturation not only, and the generator operating mode is simple, operation point is single, thereby make power generation system have very high efficiency.Simultaneously directly drive in power generation system, all electric energy all output to electrical network by the power inverter that directly drives generator, not only can make the Quality Down of electric energy, and directly drive power generation system and need one and generator capacity equal-wattage transducer, not only improved system cost, reduce system reliability, and caused the power inverter loss, further reduced the efficiency of system.Most of energy of the present invention directly feeds back to electrical network by the winding of generator, the medium tache of obstructed overpower transducer, the quality of power supply is high, harmonic wave is few, and reduced loss, and having improved efficiency, power inverter of the present invention is only to power to speed-adjustable motor, current capacity is less, saves cost.Wind-power generating system of the present invention has saved brush simultaneously, compares the double feedback electric engine system and has higher reliability, has reduced maintenance.And the stepless change of device of the present invention by two patterns, effectively reduced the capacity of speed-adjustable motor, enlarged the speed range of wind energy conversion system, more be fit to jumbo wind-power electricity generation occasion.
The present invention simultaneously is by the speed governing design of planetary pinion and speed change gear, the slow-revving mechanical energy of large torque is converted into high rotating speed, the mechanical energy output of low torque, can be so that speed-adjustable motor be the motor of a high speed low torque, volume is little, save cost, the power demand transducer is also smaller simultaneously, namely adopts two low power speed-adjustable motors the mechanical energy of powerful velocity variations to be converted into the mechanical energy of a permanent rotating speed.Simultaneously generator is also to be the motor of a constant frequency of okperation of high speed low torque, has equally a volume little, the advantage of saving cost.
Device of the present invention only needs two to three planetary pinions, two speed-adjustable motors, two power inverters and a locking engagement, a clutch engagement, the on off state of the rotating speed of adjustment speed-adjustable motor and clutch, locking engagement, the mechanical energy output that can keep constant frequency.When wind energy conversion system transfers energy to arrangements for speed regulation of the present invention, the electric energy of a constant frequency of output is sent into electrical network, and the system Main Function is that the speed that changes is become constant speed, plays the speed governing effect.
Claims (4)
1. wind generating unit, comprise active stepless speed-regulating device (1000), wind energy conversion system (11) and generator (6), it is characterized in that, described active stepless speed-regulating device (1000) comprises two planetary pinions: the first planetary pinion (2) and the second planetary pinion (3), two speed-adjustable motors: the first speed-adjustable motor (4) and the second speed-adjustable motor (5), two power inverters: the first power inverter (9) and the second power inverter (10); A locking engagement (7) and a clutch (8); The planet carrier (22) of the first planetary pinion (2) and the planet carrier (32) of the second planetary pinion (3) are rigidly connected by input shaft (1) and wind energy conversion system (11), the rotor (42) of the first speed-adjustable motor (4) is rigidly connected with the sun gear (21) of the first planetary pinion (2), and the rotor (52) of the second speed-adjustable motor (5) is rigidly connected with the sun gear (31) of the second planetary pinion (3); Between the external toothing (23) of the first planetary pinion (2) and the casing of described wind generating unit, locking engagement (7) is arranged, locking engagement (7) closure maintains static the external toothing (23) of the first planetary pinion (2); Between the external toothing (23) of the first planetary pinion (2) and the sun gear (31) of the second planetary pinion (3), clutch (8) is arranged, clutch (8) closure makes the external toothing (23) of the first planetary pinion (2) and sun gear (31) synchronous rotary of the second planetary pinion (3); The external toothing (33) of the second planetary pinion (3) is rigidly connected with the rotor (62) of generator (6), the first speed-adjustable motor (4) is connected with electrical network (12) by the first power inverter (9), and the second speed-adjustable motor (5) is connected with electrical network (12) by the second power inverter (10).
2. wind generating unit as claimed in claim 1, is characterized in that, when the rotating speed of described wind energy conversion system (11) when setting rotating speed, described locking engagement (7) closure, clutch (8) is opened, wind generating unit is operated in pattern one state; When setting rotating speed, locking engagement (7) is opened when the rotating speed of described wind energy conversion system (11), clutch (8) closure, and wind generating unit is operated in the pattern two-state; When the rotating speed of wind energy conversion system (11) equaled to set rotating speed, locking engagement (7) was opened, clutch (8) closure, and the working state of wind energy conversion system (11) switches to pattern two from pattern one.
3. wind generating unit as claimed in claim 1, is characterized in that, when the rotating speed of described wind energy conversion system (11) when setting rotating speed, described locking engagement (7) closure, clutch (8) is opened, wind generating unit is operated in pattern one state; When setting rotating speed, locking engagement (7) is opened when the rotating speed of described wind energy conversion system (11), clutch (8) closure, and wind generating unit is operated in the pattern two-state; When the rotating speed of described wind energy conversion system (11) equals to set rotating speed, described locking engagement (7) closure, clutch (8) is opened, and the working state of wind energy conversion system (11) switches to pattern one from pattern two.
4. wind generating unit as claimed in claim 1, it is characterized in that, described wind energy conversion system (11) replaces with wind energy conversion system (11) with the Placement of the planet carrier (22) of the first planetary pinion (2) and is connected with the planet carrier (22) of the first planetary pinion (2) by speed change gear (13); The first speed-adjustable motor (4) replaces with the first speed-adjustable motor (4) with the Placement of the sun gear (21) of the first planetary pinion (2) and is connected with the sun gear (21) of the first planetary pinion (2) by speed change gear (14); The second speed-adjustable motor (5) replaces with the second speed-adjustable motor (5) with the Placement of the sun gear (31) of the second planetary pinion (3) and is connected with the sun gear (31) of the second planetary pinion (3) by speed change gear (15); Generator (6) replaces with generator (6) with the Placement of the external toothing (33) of the second planetary pinion (3) and is connected with the external toothing (33) of the second planetary pinion (3) by speed change gear (16).
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| CN103423384A (en) * | 2012-05-18 | 2013-12-04 | 孟良吉 | Gear type coupler |
| CN103527413A (en) * | 2013-09-23 | 2014-01-22 | 王德忠 | Wind power generating device capable of generating power at constant frequency |
| CN105291805B (en) * | 2014-06-04 | 2018-03-13 | 中山大学 | It is driven integration system and its control method |
| CN104675612B (en) * | 2014-09-12 | 2017-09-22 | 北京精密机电控制设备研究所 | Measurement while drilling band speed-regulating function slurry generator |
| CN106224163A (en) * | 2016-09-14 | 2016-12-14 | 上海电机学院 | A kind of wind-driven generator wheel-box multi-change speed method |
| CN109973593B (en) * | 2019-03-29 | 2023-12-12 | 厦门理工学院 | Planetary gear speed increaser |
| CN114256870A (en) * | 2021-11-16 | 2022-03-29 | 国家电投集团科学技术研究院有限公司 | Wind power generation system and control method of wind power generation system |
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| CN101016882B (en) * | 2007-01-05 | 2010-05-19 | 东南大学 | Electric stepless speed change double power flow wind-power generator set |
| CN100425870C (en) * | 2007-03-27 | 2008-10-15 | 邹政耀 | Planetary gear type stepless variable speed drive system |
| AT507394B1 (en) * | 2008-10-09 | 2012-06-15 | Gerald Dipl Ing Hehenberger | WIND TURBINE |
| CN101598113B (en) * | 2009-07-10 | 2011-06-15 | 中国科学院电工研究所 | Wind power plant generation device |
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