CN102269123A - Wind power generation device - Google Patents
Wind power generation device Download PDFInfo
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- CN102269123A CN102269123A CN201110171872A CN201110171872A CN102269123A CN 102269123 A CN102269123 A CN 102269123A CN 201110171872 A CN201110171872 A CN 201110171872A CN 201110171872 A CN201110171872 A CN 201110171872A CN 102269123 A CN102269123 A CN 102269123A
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- adjustable motor
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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 the 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 be one of the most ripe renewable energy sources of technology that people grasped.The wind-power generating system of main flow is double feedback electric engine and straight drive system at present, the stator of double-fed power generation system directly links to each other with electrical network, realize speed governing by the slip power of regulating in the rotor winding, therefore the rotor winding needs the powerful inverter power supply of a 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 adopt bigger rotor diameter and more number of pole-pairs, has increased difficulty for the design and the manufacturing 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 is 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, is the mechanical energy of electric energy and the output of constant frequency rate with the wind energy transformation of velocity variations by double-mechanical-port motor.But this electric machine structure complexity, manufacturing difficulty, also there is the maintenance issues of brush and slip ring in the while.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, though patent 200910089259.7 has realized variable speed constant frequency, but when wind energy is very big or very little, the Capacity Ratio of speed-adjustable motor is bigger, 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: first planetary pinion, second planetary pinion, first speed-adjustable motor, second speed-adjustable motor, first power inverter, 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 power inverter is that the Ac of variable voltage variable frequency is powered to speed-adjustable motor with the transformation of electrical energy of electrical network.The first planetary planet carrier is rigidly connected by one of the active stepless speed-regulating device and the second planetary planet carrier, the rotor of first speed-adjustable motor and the first planetary sun gear are rigidly connected, the rotor of second speed-adjustable motor and the second planetary sun gear are rigidly connected, between the first planetary external toothing and the 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 the first planetary external toothing and the second planetary sun gear rotate synchronously, and the second planetary external toothing is as two of active stepless speed-regulating device.Regulate the first planetary sun gear and the second planetary sun gear rotating speed by the control speed-adjustable motor, when reaching rotation speed change of active stepless speed-regulating device, two rotating speed operations that remain on setting of active stepless speed-regulating device realize stepless shift function.
Simultaneously, when the rotating speed of one of active stepless speed-regulating device when setting rotating speed, the locking engagement closure, clutch is opened, active stepless speed-regulating device is operated in pattern one; When the rotating speed of one of active stepless speed-regulating device when setting rotating speed, locking engagement is opened, the clutch closure, active stepless speed-regulating device is operated in pattern two; When the rotating speed of one of active stepless speed-regulating device equals to set rotating speed, carry out locking engagement and clutch switch and change the i.e. switching of pattern one and pattern two; Two that can guarantee active stepless speed-regulating device like this 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 second speed-adjustable motor to the switching of pattern two is zero, promptly when the rotating speed of one of active stepless speed-regulating device when setting rotating speed, the locking engagement closure, clutch is opened, the rotating speed that active stepless speed-regulating device is operated in pattern one, the second speed-adjustable motor is a negative value; Along with the rotating speed increase of one of active stepless speed-regulating device, when the rotating speed of one of active stepless speed-regulating device equaled to set rotating speed, the rotating speed of second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch was opened locking engagement; Rotating speed that active stepless speed-regulating device is one continues to increase, when the rotating speed of one of active stepless speed-regulating device when setting rotating speed, active stepless speed-regulating device is operated in pattern two.
The present invention realizes stepless speed regulation by successive control speed-adjustable motor rotating speed, 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: first planetary pinion, second planetary pinion; Two speed-adjustable motors: first speed-adjustable motor, second speed-adjustable motor; Two power inverters: first power inverter, second power inverter; A generator, a locking engagement and a clutch.The first planetary planet carrier is rigidly connected by one of active stepless speed-regulating device and the second planetary planet carrier and wind energy conversion system, the rotor of first speed-adjustable motor and the first planetary sun gear are rigidly connected, the rotor of second speed-adjustable motor and the second planetary sun gear are rigidly connected, between the first planetary external toothing and the casing locking engagement is arranged, the locking engagement closure can make the first planetary external toothing maintain static, between the first planetary external toothing and the second planetary sun gear clutch is arranged, the clutch closure can make the first planetary external toothing and the second planetary sun gear rotate synchronously, the rotor of the second planetary external toothing and generator is rigidly connected, and the staor winding of generator directly is connected with electrical network.First speed-adjustable motor is connected with electrical network by first power inverter, and second speed-adjustable motor is connected with electrical network by second power inverter, and power inverter is that the Ac of variable voltage variable frequency is powered to the speed-adjustable motor staor winding respectively with the transformation of electrical energy of electrical network.
Simultaneously also have signaling line to be connected between power inverter and the 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 the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, wind generating unit is operated in pattern one; When the rotating speed of wind energy conversion system when setting rotating speed, locking engagement is opened, the clutch closure, 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 the i.e. switching of pattern one and pattern two; Can guarantee that like this generator is always operating at fixing rotating speed, guarantee the stationarity of handoff procedure simultaneously.When the rotor speed that pattern one occurs in second speed-adjustable motor to the switching of pattern two is zero, promptly when the rotating speed of wind energy conversion system during less than the setting rotating speed, the locking engagement closure, clutch is opened, and the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is a 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 second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch was opened locking engagement; The rotating speed of wind energy conversion system continues to increase, when the rotating speed of wind energy conversion system when setting rotating speed, wind generating unit is operated in pattern two.
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 closure, therefore the first planetary external toothing maintains static, and the energy on the planet carrier all is delivered to the first planetary sun gear, drives the generating of first speed-adjustable motor, generate electricity and can be converted to the phase place Ac identical, feedback grid by first power inverter with voltage and electrical network.Second speed-adjustable motor is by information such as sensor measurement rotating speed of motor, feed back to second power inverter by signaling line, the information that second power inverter is set rotating speed and feedback rotating speed according to second speed-adjustable motor provides the Ac of different frequency and voltage for the staor winding of second speed-adjustable motor, control 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 second speed-adjustable motor by sun gear, is converted to the phase place Ac identical with voltage and electrical network by 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, owing to clutch closure this moment, therefore the first planetary external toothing and the second planetary sun gear rotate synchronously, energy part on the planet carrier is delivered to the first planetary sun gear, drive the generating of first speed-adjustable motor, generate electricity and can be converted to the phase place Ac identical, feedback grid by first power inverter with voltage and electrical network; Another part is delivered to the first planetary external toothing, drives second speed-adjustable motor generating, generate electricity and can be converted to the phase place Ac identical, feedback grid by second power inverter with voltage and electrical network.Second speed-adjustable motor is by information such as sensor measurement rotating speed of motor, feed back to second power inverter by signaling line, the information that second power inverter is set rotating speed and feedback rotating speed according to second speed-adjustable motor provides the Ac of different frequency and voltage for the staor winding of second speed-adjustable motor, control 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 second speed-adjustable motor by sun gear, is converted to the phase place Ac identical with voltage and electrical network by 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, first speed-adjustable motor can be connected with the first planetary sun gear by speed change gear, 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 make things convenient for Machine Design and design of electrical motor, improve rotating speed of motor simultaneously, 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: first planetary pinion, second planetary pinion, the third line star gear; Two speed-adjustable motors: first speed-adjustable motor, second speed-adjustable motor; Two power inverters: first power inverter, second power inverter; A generator, a locking engagement and a clutch.The planet carrier of wind energy conversion system and the third line star gear is rigidly connected, the first planetary planet carrier and the second planetary planet carrier are rigidly connected, the rotor of first speed-adjustable motor, the sun gear of the first planetary sun gear and the third line star gear is rigidly connected, the rotor of second speed-adjustable motor, the second planetary sun gear and the first planetary external toothing are rigidly connected, between the external toothing of the third line star gear and the casing of described wind generating unit locking engagement is arranged, the locking engagement closure can make the external toothing of the third line star gear maintain static, between the planet carrier of the second planetary planet carrier and the third line star gear clutch is arranged, the clutch closure can make the first planetary planet carrier, the second planetary planet carrier, the planet carrier of the third line star gear rotates synchronously, the rotor of the second planetary external toothing and generator is rigidly connected, and the staor winding of generator directly is connected with electrical network.First speed-adjustable motor is connected with electrical network by first power inverter, and second speed-adjustable motor is connected with electrical network by second power inverter, and power inverter is that the Ac of variable voltage variable frequency is powered to the speed-adjustable motor staor winding respectively with the transformation of electrical energy of electrical network.
Simultaneously also have signaling line to be connected between power inverter and the 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 the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, wind generating unit is operated in pattern one; When the rotating speed of wind energy conversion system when setting rotating speed, locking engagement is opened, the clutch closure, 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 second speed-adjustable motor was zero, the locking engagement closure, and clutch is opened, and pattern one is switched to pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, the clutch closure, and pattern two is switched to pattern one; Can guarantee that like this generator is always operating at fixing rotating speed, guarantee the stationarity of handoff procedure simultaneously.As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select the switch mode of wind generating unit as required.When the rotor speed that pattern one occurs in second speed-adjustable motor to the switching of pattern two is zero, promptly when the rotating speed of wind energy conversion system during less than the setting rotating speed, the locking engagement closure, clutch is opened, and the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is a 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 second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch was opened locking engagement; The rotating speed of wind energy conversion system continues to increase, when the rotating speed of wind energy conversion system when setting rotating speed, wind generating unit is operated in pattern two.
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: first planetary pinion, second planetary pinion, the third line star gear; Two speed-adjustable motors: first speed-adjustable motor, second speed-adjustable motor; Two power inverters: first power inverter, second power inverter; A generator, a locking engagement and a clutch.The planet carrier of wind energy conversion system and the third line star 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 first speed-adjustable motor, the first planetary sun gear, the second planetary sun gear, the sun gear of the third line star gear is rigidly connected, the rotor of second speed-adjustable motor and the second planetary external toothing are rigidly connected, between the external toothing of the third line star gear and the casing of described wind generating unit locking engagement is arranged, the locking engagement closure can make the external toothing of the third line star 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 the third line star gear clutch is arranged, the clutch closure can make the second planetary planet carrier, the planet carrier and the wind energy conversion system of the third line star gear rotate synchronously.First speed-adjustable motor is connected with electrical network by first power inverter, and second speed-adjustable motor is connected with electrical network by second power inverter, and power inverter is that the Ac of variable voltage variable frequency is powered to the speed-adjustable motor staor winding respectively with the transformation of electrical energy of electrical network.
Simultaneously also have signaling line to be connected between power inverter and the 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 the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, wind generating unit is operated in pattern one; When the rotating speed of wind energy conversion system when setting rotating speed, locking engagement is opened, the clutch closure, 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 second speed-adjustable motor was zero, the locking engagement closure, and clutch is opened, and pattern one is switched to pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, the clutch closure, and pattern two is switched to pattern one; As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select the switch mode of wind generating unit as required.Can guarantee that like this generator is always operating at fixing rotating speed, guarantee the stationarity of handoff procedure simultaneously.When the rotor speed that pattern one occurs in second speed-adjustable motor to the switching of pattern two is zero, promptly when the rotating speed of wind energy conversion system during less than the setting rotating speed, the locking engagement closure, clutch is opened, and the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is a 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 second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch was opened locking engagement; The rotating speed of wind energy conversion system continues to increase, when the rotating speed of wind energy conversion system when setting rotating speed, wind generating unit is operated in pattern two.
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: first planetary pinion, second planetary pinion, the third line star gear; Two speed-adjustable motors: first speed-adjustable motor, second speed-adjustable motor; Two power inverters: first power inverter, second power inverter; A generator, a locking engagement and a clutch.The planet carrier of wind energy conversion system and the third line star 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 first speed-adjustable motor, the sun gear of the first planetary sun gear and the third line star gear is rigidly connected, the rotor of second speed-adjustable motor, the second planetary sun gear is rigidly connected, between the external toothing of the third line star gear and the casing of described wind generating unit locking engagement is arranged, the locking engagement closure can make the external toothing of the third line star 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 the third line star gear clutch is arranged, the clutch closure can make the first planetary external toothing, the second planetary planet carrier, the planet carrier of the third line star gear rotates synchronously.First speed-adjustable motor is connected with electrical network by first power inverter, and second speed-adjustable motor is connected with electrical network by second power inverter, and power inverter is that the Ac of variable voltage variable frequency is powered to the speed-adjustable motor staor winding respectively with the transformation of electrical energy of electrical network.
Simultaneously also have signaling line to be connected between power inverter and the 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 the rotating speed of wind energy conversion system when setting rotating speed, the locking engagement closure, clutch is opened, wind generating unit is operated in pattern one; When the rotating speed of wind energy conversion system when setting rotating speed, locking engagement is opened, the clutch closure, 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 second speed-adjustable motor was zero, the locking engagement closure, and clutch is opened, and pattern one is switched to pattern two; When the rotating speed of wind energy conversion system equaled to set rotating speed, locking engagement was opened, the clutch closure, and pattern two is switched to pattern one; As mentioned above, when the rotating speed of wind energy conversion system equals to set rotating speed, can select the switch mode of wind generating unit as required.Can guarantee that like this generator is always operating at fixing rotating speed, guarantee the stationarity of handoff procedure simultaneously.When the rotor speed that pattern one occurs in second speed-adjustable motor to the switching of pattern two is zero, promptly when the rotating speed of wind energy conversion system during less than the setting rotating speed, the locking engagement closure, clutch is opened, and the rotating speed that wind generating unit is operated in pattern one, the second speed-adjustable motor is a 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 second speed-adjustable motor was reduced to zero gradually, and this moment, closed clutch was opened locking engagement; The rotating speed of wind energy conversion system continues to increase, when the rotating speed of wind energy conversion system when setting rotating speed, wind generating unit is operated in pattern two.
Above-mentioned wind generating unit of the present invention has improvement project one, scheme two and scheme three can adopt gear graduation equally when wind energy conversion system, first speed-adjustable motor, second speed-adjustable motor are connected with this device with generator, improve, make the volume of wind generating unit littler, cost is lower.
To provide device of the present invention mainly be two patterns above-mentioned, on the basis of two above-mentioned mode devices, and by combination, can the planet three-mode, 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 make full use of the mature technology of constant frequency generation.
3, compare with directly driving generator system, electric energy is produced by conventional generator in apparatus of the present invention, 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, reduced the capacity of speed-adjustable motor effectively.
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 first exemplary embodiment according to the present invention;
Among the figure: one 1 of active stepless speed-regulating device, two 100, the first planetary pinions of active stepless speed-regulating device, 2, the second planetary pinions 3, first speed-adjustable motor, 4, the second speed-adjustable motors, 5, the first power inverters, 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 first speed-adjustable motor, stator 41; The rotor 52 of second speed-adjustable motor, stator 51;
The structural representation of the active stepless speed-regulating device in Fig. 2 first embodiment of the invention;
Among the 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 of the band gear graduation of modification on according to the basis of first embodiment of the invention;
Among the 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;
Among the figure: the third line star 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 wind generating unit in conjunction with the accompanying drawings in detail according to the embodiment of the invention.
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 one 1 of active stepless speed-regulating device 1000, and generator 6 is connected to two 100 of active stepless speed-regulating device 1000.Wind energy conversion system 11 rotates under the wind-force effect, converts 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: first planetary pinion 2 and second planetary pinion 3; Two speed-adjustable motors: first speed-adjustable motor 4 and second speed-adjustable motor 5; Two power inverters: first power inverter 9 and second power inverter 10; A locking engagement 7 and a clutch 8.The planet carrier 22 of first planetary pinion 2 is rigidly connected by the planet carrier 32 of one 1 of the active stepless speed-regulating device and second planetary pinion 3, the rotor 42 of first speed-adjustable motor 4 and the sun gear 21 of first planetary pinion 2 are rigidly connected, the rotor 52 of second speed-adjustable motor 5 and the sun gear 31 of second planetary pinion 3 are rigidly connected, between the external toothing 23 of 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 first planetary pinion 2 maintain static, between the external toothing 23 of first planetary pinion 2 and the sun gear 31 of second planetary pinion 3 clutch 8 is arranged, clutch 8 closures can make the external toothing 23 of first planetary pinion 2 and the sun gear 31 of second planetary pinion 3 rotate synchronously, and the external toothing 33 of second planetary pinion 3 and two 100 of active stepless speed-regulating device are rigidly connected.First power inverter 9 is connected first speed-adjustable motor 4 with electrical network 12 or other power supplys, second power inverter 10 is connected 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 the 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;
By following formula (1) as can be seen, rotating speed between planetary sun gear, planet carrier and the external toothing three has strict relation, this relation is relevant with 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 rotation degrees of freedom, be that the speed of the 3rd parts is unique to be determined after the rotational speed of any 2 parts was determined in the external toothing, sun gear, planet carrier of active stepless speed-regulating device.
In the active stepless speed-regulating device of the present invention, there are two groups of planetary pinions, first planetary pinion 2 and second planetary pinion 3, all has above-mentioned relation, and the planet carrier 22 of first planetary pinion 2 and the planet carrier 32 of second planetary pinion 3 are rigidly connected, and when locking engagement 7 closures, clutch 8 is opened, this working state is a pattern one, has following relation this moment:
In the formula,
ω
M1It is the rotating speed of first speed-adjustable motor 4;
ω
M2It is the rotating speed of second speed-adjustable motor 5;
ω
1It is the rotating speed of one 1 of active stepless speed changes devices;
ω
100It is the rotating speed of two 100 of active stepless speed changes devicess;
ρ
1Be the first planetary sun gear number of teeth and external toothing number of teeth ratio;
ρ
2Be the second planetary sun gear number of teeth and external toothing number of teeth ratio.
According to formula (2) as can be seen, the rotational speed omega of one 1 of active stepless speed changes devices
1When changing, by adjusting the rotational speed omega of second speed-adjustable motor 5
M2Can guarantee the rotational speed omega of two 100 of active stepless speed changes devicess
100Remain unchanged, realize stepless speed regulation.But, under this pattern, when the rotational speed omega of one 1 of active stepless speed changes devices
1When very high, adjust the rotational speed omega of second speed-adjustable motor 5
M2Can be very high, the capacity that causes adjusting second speed-adjustable motor 5 and second power inverter 10 is bigger, causes that system bulk is big, cost is high.Therefore, set the mode switching rotational speed omega
12, when the rotational speed omega of one 1 of active stepless speed changes devices
1＜ω
12The time, active stepless speed changes devices adopts above-mentioned mode of operation one, and when the rotational speed omega of one 1 of active stepless speed changes devices
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 that first speed-adjustable motor 4 has participated in speed governing work, share a part of power output, reduce the capacity of second speed-adjustable motor 5 and second power inverter 10.
Therefore, wind generating unit of the present invention can be by regulating the speed of second speed-adjustable motor 5, controls the ratio of two 100 of one 1 of active stepless speed changes devices and active stepless speed changes devicess, and the variation that this ratio can be continuous, promptly realizes stepless speed regulation.On the other hand, with two kinds of mode of operations, effectively reduced the capacity of speed-adjustable motor according to the different mining of operating mode.
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 one 1 of active stepless speed-regulating device, the rotor 62 and two 100 of the active stepless speed-regulating devices of generator 6 are rigidly connected, and stator 61 windings of generator 6 directly are connected with electrical network 12.
In the 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 the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 is opened, clutch 8 closures, described wind generating unit is operated in pattern two; Can guarantee that like this generator 6 is always operating at constant rotating speed, guarantee the stationarity of handoff procedure simultaneously.
When rotor 52 rotating speeds that pattern one occurs in second speed-adjustable motor 5 to the switching of pattern two are zero, promptly 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 a 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 second speed-adjustable motor 5 was reduced to zero gradually, and this moment, closed clutch 8 was opened locking engagement 7; The rotating speed of wind energy conversion system 11 continues to increase, when the rotating speed of wind energy conversion system 11 when setting rotating speed, described wind generating unit is operated in pattern two.Can carry out the switching of pattern two equally as required to pattern one.
Wind generating unit of the present invention is operated in pattern for the moment among Fig. 1, part wind energy is delivered on the planet carrier 22 of first planetary pinion 2 by wind energy conversion system 11, driving planet carrier 22 rotates, because locking engagement 7 closures, therefore the external toothing 23 of first planetary pinion 2 maintains static, energy on the planet carrier 22 all is delivered to the sun gear 21 of first planetary pinion 2, drive 4 generatings of first speed-adjustable motor, generate electricity and can be converted to the identical Ac of phase place and voltage and electrical network 12 by first power inverter 9, feed back to electrical network 12.Second speed-adjustable motor 5 is by information such as sensor measurement motor 5 rotating speeds, feed back to second power inverter 10 by signaling line, the information that second power inverter 10 is set rotating speed and feedback rotating speed according to second speed-adjustable motor 5 provides the Ac of different frequency and voltage for stator 51 windings of second speed-adjustable motor 5, control second speed-adjustable motor 5 according to setting the rotating speed operation, by adjusting the rotating speed of second speed-adjustable motor 5, guarantee generator 6 working speeds that the invariablenes turning speed of the external toothing 33 of 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 second planetary pinion 3, be converted into electric energy by generator 6, be input to electrical network 12, the remainder energy is delivered to second speed-adjustable motor 5 by sun gear 31, is converted to phase place and voltage and electrical network 12 identical Ac by 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 first planetary pinion 2 by wind energy conversion system 11, driving planet carrier 22 rotates, owing to clutch 8 closures this moment, therefore the external toothing 23 of first planetary pinion 2 and the sun gear 31 of second planetary pinion 3 rotate synchronously, energy part on the planet carrier 22 is delivered to the sun gear 21 of first planetary pinion 2, drive 4 generatings of first speed-adjustable motor, generate electricity and can be converted to the identical Ac of phase place and voltage and electrical network 12 by first power inverter 9, feed back to electrical network 12; Another part is delivered to the external toothing 23 of first planetary pinion 2, drives the generating of second speed-adjustable motor 5, generate electricity and can be converted to the identical Ac of phase place and voltage and electrical network 12 by second power inverter 10, feed back to electrical network 12.Second speed-adjustable motor 5 is by the information such as rotating speed of sensor measurement motor 5, feed back to second power inverter 10 by signaling line, the information that second power inverter 10 is set rotating speed and feedback rotating speed according to second speed-adjustable motor 5 provides the Ac of different frequency and voltage for stator 51 windings of second speed-adjustable motor 5, control second speed-adjustable motor 5 according to setting the rotating speed operation, by adjusting second speed-adjustable motor, 5 rotating speeds, guarantee generator 6 working speeds that the invariablenes turning speed of the external toothing 33 of 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 second planetary pinion 3, be converted into electric energy by generator 6, be input to electrical network 12, the remainder energy is delivered to second speed-adjustable motor 5 by sun gear 31, is converted to phase place and voltage and electrical network 12 identical Ac by second power inverter 10 and is input to electrical network 12.
Fig. 3 is the modified example after the wind generating unit among Fig. 1 increases gear graduation.As shown in Figure 3, wind energy conversion system 11 is connected with the planet carrier 22 of first planetary pinion 2 by speed change gear 13, first speed-adjustable motor 4 by speed change gear 14 be connected with the sun gear 21 of first planetary pinion 2, second speed-adjustable motor 5 by speed change gear 15 be connected with the sun gear 31 of second planetary pinion 3, generator 6 is connected with the external toothing 33 of second planetary pinion 3 by speed change gear 16, to make things convenient for Machine Design and design of electrical motor, improve rotating speed of motor simultaneously, 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: first planetary pinion 2, second planetary pinion 3 and the third line star gear 20, two speed-adjustable motors: first speed-adjustable motor 4 and second speed-adjustable motor 5, two power inverters: first power inverter 9 and 6, one locking engagements 7 of 10, one generators of second power inverter and a clutch 8.Wind energy conversion system 11 is rigidly connected with the planet carrier 202 of the third line star gear 20, the planet carrier 22 of first planetary pinion 2 and the planet carrier 32 of second planetary pinion 3 are rigidly connected, the rotor 42 of first speed-adjustable motor 4, the sun gear 201 of the sun gear 21 of first planetary pinion 2 and the third line star gear 20 is rigidly connected, the rotor 52 of second speed-adjustable motor 5, the sun gear 31 of second planetary pinion 3 and the external toothing 23 of first planetary pinion 2 are rigidly connected, between the external toothing 203 of the third line star 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 the third line star gear 20 maintain static, between the planet carrier 202 of the planet carrier 32 of second planetary pinion 3 and the third line star gear 20 clutch 8 is arranged, clutch 8 closures can make the planet carrier 22 of first planetary pinion 2, the planet carrier 32 of second planetary pinion 3, the planet carrier 202 of the third line star gear 20 rotates synchronously, the external toothing 33 of second planetary pinion 3 is rigidly connected with the rotor 62 of generator 6, and stator 61 windings of generator 6 directly are connected with electrical network 12.First power inverter 9 is connected first speed-adjustable motor 4 with electrical network 12, second power inverter 10 is connected second speed-adjustable motor 5 with electrical network 12, first power inverter 9 and second power inverter 10 are the staor winding power supply that the Ac of variable voltage variable frequency is given first speed-adjustable motor 4 and second speed-adjustable motor 5 respectively with the transformation of electrical energy of electrical network, first power inverter 9 and second power inverter 10 also have signaling line to be connected respectively with between first speed-adjustable motor 4 and second speed-adjustable motor 5 simultaneously, can carry out communication.First speed-adjustable motor 4 and 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 the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 is opened, clutch 8 closures, 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 second speed-adjustable motor 5 are zero, promptly carry out the switching between pattern one and the pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
Similar with first embodiment, also can increase speed change gear, promptly, wind energy conversion system 11 can be connected by the planet carrier 202 of speed change gear with the third line star gear 20, first speed-adjustable motor 4 can be connected with the sun gear 21 of first planetary pinion 2 by speed change gear, second speed-adjustable motor 5 can be connected with the sun gear 31 of second planetary pinion 3 by speed change gear, generator 6 can be connected with the external toothing 33 of second planetary pinion 3 by speed change gear, to make things convenient for Machine Design and design of electrical motor, improve rotating speed of motor simultaneously, 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: first planetary pinion 2, second planetary pinion 3 and the third line star gear 20, two speed-adjustable motors: first speed-adjustable motor 4 and second speed-adjustable motor 5, two power inverters: first power inverter 9 and 6, one locking engagements 7 of 10, one generators of second power inverter and a clutch 8.Wind energy conversion system 11 is rigidly connected with the planet carrier 202 of the third line star gear 20, and the planet carrier 22 of 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 first speed-adjustable motor 4, the sun gear 21 of first planetary pinion 2, the sun gear 31 of second planetary pinion 3, the sun gear 201 of the third line star gear 20 is rigidly connected, the rotor 52 of second speed-adjustable motor 5 and the external toothing 33 of second planetary pinion 3 are rigidly connected, between the external toothing 203 of the third line star 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 the third line star gear 20 maintain static, linking together of external toothing 23 rigidity of the planet carrier of second planetary pinion 3 (32) and first planetary pinion 2, between the planet carrier 202 of the planet carrier 32 of second planetary pinion 3 and the third line star gear 20 clutch 8 is arranged, clutch 8 closures can make the planet carrier 32 of second planetary pinion 3, the planet carrier 202 of the third line star gear 20 and wind energy conversion system 11 rotate synchronously.First speed-adjustable motor 4 is connected with electrical network 12 by first power inverter 9, second power inverter 10 is connected second speed-adjustable motor 5 with electrical network 12, first power inverter 9 and second power inverter 10 are the staor winding power supply that the Ac of variable voltage variable frequency is given first speed-adjustable motor 4 and second speed-adjustable motor 5 respectively with the transformation of electrical energy of electrical network, first power inverter 9 and second power inverter 10 also have signaling line to be connected respectively with between first speed-adjustable motor 4 and second speed-adjustable motor 5 simultaneously, can carry out communication.First speed-adjustable motor 4 and 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 the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 is opened, clutch 8 closures, 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 second speed-adjustable motor 5 are zero, carry out the switching between pattern one and the pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
Similar with first embodiment, also can increase speed change gear, promptly, wind energy conversion system 11 can be connected by the planet carrier 202 of speed change gear with the third line star gear 20, first speed-adjustable motor 4 can be connected with the sun gear 21 of first planetary pinion 2 by speed change gear, second speed-adjustable motor 5 can be connected with the external toothing 33 of second planetary pinion 3 by speed change gear, generator 6 can be connected with the planet carrier 22 of first planetary pinion 2 by speed change gear, to make things convenient for Machine Design and design of electrical motor, improve rotating speed of motor simultaneously, 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: first planetary pinion 2, second planetary pinion 3, with 20, two speed-adjustable motors of the third line star gear: first speed-adjustable motor 4 and 5, two power inverters of second speed-adjustable motor: first power inverter 9 and 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 the third line star gear 20, and the planet carrier 22 of first planetary pinion 2, the external toothing 33 of 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 first speed-adjustable motor 4, the sun gear 201 of the sun gear 21 of first planetary pinion 2 and the third line star gear 20 is rigidly connected, the rotor 52 of second speed-adjustable motor 5, the sun gear 31 of second planetary pinion 3 is rigidly connected, between the external toothing 203 of the third line star 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 the third line star gear 20 maintain static, the planet carrier 32 of second planetary pinion 3 and the external toothing 23 of first planetary pinion 2 are rigidly connected, between the planet carrier 202 of the planet carrier 32 of second planetary pinion 3 and the third line star gear 20 clutch 8 is arranged, clutch 8 closures can make the external toothing 23 of first planetary pinion 2, the planet carrier 32 of second planetary pinion 3, the planet carrier 202 of the third line star gear 20 rotates synchronously.First power inverter 9 is connected first speed-adjustable motor 4 with electrical network 12, second power inverter 10 is connected second speed-adjustable motor 5 with electrical network 12, first power inverter 9 and second power inverter 10 are the staor winding power supply that the Ac of variable voltage variable frequency is given first speed-adjustable motor 4 and second speed-adjustable motor 5 respectively with the transformation of electrical energy of electrical network, first power inverter 9 and second power inverter 10 also have signaling line to be connected respectively with between first speed-adjustable motor 4 and second speed-adjustable motor 5 simultaneously, can carry out communication.First speed-adjustable motor 4 and second speed-adjustable motor 5 and generator 6 can be the motor of magneto, asynchronous motor or other types as required.
According to the described wind generating unit of 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 the rotating speed of wind energy conversion system 11 when setting rotating speed, locking engagement 7 is opened, clutch 8 closures, 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 second speed-adjustable motor 5 are zero, carry out the switching between pattern one and the pattern two when the rotating speed of wind energy conversion system 11 equals to set rotating speed.
Similar with first embodiment, also can increase speed change gear, promptly, wind energy conversion system 11 can be connected by the planet carrier 202 of speed change gear with the third line star gear 20, first speed-adjustable motor 4 can be connected with the sun gear 21 of first planetary pinion 2 by speed change gear, second speed-adjustable motor 5 can be connected with the sun gear 31 of second planetary pinion 3 by speed change gear, generator 6 can be connected with the external toothing 33 of second planetary pinion 3 by speed change gear, to make things convenient for Machine Design and design of electrical motor, improve rotating speed of motor simultaneously, reduce volume and cost.
To provide device of the present invention mainly be two patterns above-mentioned, on the basis of two above-mentioned mode devices, by combination, can form 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, generator operating mode complexity, being difficult to guarantee has higher efficient under all operating modes, the stepless speed-regulating device that the present invention forms by planetary pinion and speed-adjustable motor becomes the wind energy conversion system output of variable working condition the mechanical energy of a constant rotational speed output, 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, and the operation point is single, thereby makes power generation system have very high efficient.Simultaneously directly drive in the power generation system, all electric energy all output to electrical network by the power inverter that directly drives generator, the quality of electric energy is descended, 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 efficient 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, quality of power supply height, harmonic wave is few, and reduced loss, and having improved efficient, power inverter of the present invention only is 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, reduced the capacity of speed-adjustable motor effectively, enlarged the speed range of wind energy conversion system, be fit to jumbo wind-power electricity generation occasion more.
The present invention simultaneously is by the speed governing design of planetary pinion and speed change gear, the slow-revving mechanical energy of big 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, promptly 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, and it is little to have volume equally, 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 it is that speed with changing becomes constant speed that system mainly acts on, and 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: first planetary pinion (2) and second planetary pinion (3), two speed-adjustable motors: first speed-adjustable motor (4) and second speed-adjustable motor (5), two power inverters: first power inverter (9) and second power inverter (10); A locking engagement (7) and a clutch (8); The planet carrier (22) of first planetary pinion (2) and the planet carrier (32) of second planetary pinion (3) are rigidly connected by input shaft (1) and wind energy conversion system (11), the rotor (42) of first speed-adjustable motor (4) is rigidly connected with the sun gear (21) of first planetary pinion (2), and the rotor (52) of second speed-adjustable motor (5) is rigidly connected with the sun gear (31) of second planetary pinion (3); Between the external toothing (23) of first planetary pinion (2) and the casing of described wind-driven generator locking engagement (7) is arranged, locking engagement (7) closure maintains static the external toothing (23) of first planetary pinion (2); Between the external toothing (23) of first planetary pinion (2) and the sun gear (31) of second planetary pinion (3) clutch (8) is arranged, clutch (8) closure makes sun gear (31) rotation synchronously of external toothing (23) with second planetary pinion (3) of first planetary pinion (2); The external toothing (33) of second planetary pinion (3) is rigidly connected with the rotor (62) of generator (6), first speed-adjustable motor (4) is connected with electrical network (12) or other power supplys by first power inverter (9), and second speed-adjustable motor (5) is connected with electrical network (12) or other power supplys by 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 the rotating speed of described wind energy conversion system (11) when setting rotating speed, locking engagement (7) is opened, clutch (8) closure, wind generating unit is operated in the pattern two-state; When the rotating speed of wind energy conversion system (11) equals to set rotating speed, locking engagement (7) closure, clutch (8) is opened, 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, it is characterized in that when the rotating speed of described wind energy conversion system (11) equaled to set rotating speed, described locking engagement (7) was opened, clutch (8) closure, 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) is connected with the planet carrier (22) of first planetary pinion (2) by speed change gear (13), first speed-adjustable motor (4) by speed change gear (14) be connected with the sun gear (21) of first planetary pinion (2), second speed-adjustable motor (5) passes through that speed change gear (15) is connected with the sun gear (31) of second planetary pinion (3), generator (6) passes through speed change gear (16) and is connected with the external toothing (33) of second planetary pinion (3).
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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 |
| CN104675612A (en) * | 2014-09-12 | 2015-06-03 | 北京精密机电控制设备研究所 | Measurement while drilling mud generator with speed regulation function |
| CN105291805A (en) * | 2014-06-04 | 2016-02-03 | 中山大学 | Transmission and integration system and control method thereof |
| 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 |
| CN109973593A (en) * | 2019-03-29 | 2019-07-05 | 厦门理工学院 | A kind of planet 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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| CN102269123B (en) | 2013-11-13 |
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