CN201526421U - Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors - Google Patents

Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors Download PDF

Info

Publication number
CN201526421U
CN201526421U CN2009202722187U CN200920272218U CN201526421U CN 201526421 U CN201526421 U CN 201526421U CN 2009202722187 U CN2009202722187 U CN 2009202722187U CN 200920272218 U CN200920272218 U CN 200920272218U CN 201526421 U CN201526421 U CN 201526421U
Authority
CN
China
Prior art keywords
speed
generator
low
power
synchronous generator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2009202722187U
Other languages
Chinese (zh)
Inventor
刘颖明
姚兴佳
王晓东
杨磊
马达龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHENYANG HUAREN WIND POWER TECHNOLOGY CO LTD
Original Assignee
SHENYANG HUAREN WIND POWER TECHNOLOGY CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHENYANG HUAREN WIND POWER TECHNOLOGY CO LTD filed Critical SHENYANG HUAREN WIND POWER TECHNOLOGY CO LTD
Priority to CN2009202722187U priority Critical patent/CN201526421U/en
Application granted granted Critical
Publication of CN201526421U publication Critical patent/CN201526421U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects

Abstract

The utility model provides a megawatt variable-speed wind driven generator set of flexible combination of a plurality of motors, mainly comprising a tower frame, a base, a low-speed permanent magnetic synchronous generator, a middle-speed permanent magnetic synchronous generator, a converter and a wheel hub with blades, wherein the wheel hub with the blades is connected with the low-speed permanent magnetic synchronous generator which is connected with the middle-speed permanent magnetic synchronous generator by a first-class speed-rising gear box; the low-speed permanent magnetic synchronous generator, the first-class speed-rising gear box and the middle-speed permanent magnetic synchronous generator are arranged on the base which is arranged on the tower frame; and the low-speed permanent magnetic synchronous generator and the middle-speed permanent magnetic synchronous generator are respectively connected into a power grid by respective and independent converter when in use. The megawatt variable-speed wind driven generator set has compact and reasonable structure, strong practicability, stability and high efficiency and is more beneficial to being promoted and applied on large scale.

Description

The MW class Variable Speed Wind Power Generator of multiple generator flexible combination
Technical field: the utility model relates to the wind-driven generator technical group field, a kind of specifically MW class Variable Speed Wind Power Generator of multiple generator flexible combination.
Background technique: in recent years, along with the development of wind generating technology, Variable Speed Wind Power Generator has become the mainstream model of large-scale wind power generator incorporated in power network group.Compare with the constant speed wind-driven generator group, the superiority of Variable Speed Wind Power Generator is: it can change according to wind speed when hanging down wind speed, is in operation to remain best tip speed ratio to obtain maximal wind-energy; Utilize the variation of wind speed round during high wind speed, store or the release portion energy, improve the flexibility of transmission system, make power output more steady.Thereby on bigger capacity, Variable Speed Wind Power Generator will replace the constant speed wind-driven generator group and become the mainstream model of wind-power electricity generation.
The drive system of at present popular Variable Speed Wind Power Generator mainly contains three kinds of schemes:
First kind is high-speed asynchronous power generator double-fed system, and it mainly is made of three grades of step-up gears+Wound-rotor asynchronous generator+two way convertor.Be characterized in that generator speed can be in the upper and lower two changes of direction of synchronous speed, the rotation speed change scope be generally the generator rated speed ± 1/3, the power of corresponding current transformer has only 1/3 of generator power.This scheme must be used three grades of raising speed gear-boxes, joins high-speed asynchronous power generator (adopting the 4-6 pole generator usually).Raising speed gear-box speed ratio is big, load is heavy, change the impact fluctuation greatly with wind speed, and fatiguability damages, and rate of fault is high to be the major defect of this scheme.Winding asynchronous generator amature winding is presented electricity needs brush and slip ring, and it is another shortcoming of this programme that position measurement needs encoder, influences reliability, increases maintenance workload.
Second kind is the straight drive system of low-speed permanent-magnet synchronous generator, and it mainly is made of low-speed permanent-magnet synchronous generator+full power convertor.Its feature is: do not have the raising speed gear-box, impeller directly drives the low-speed permanent-magnet synchronous generator rotor, has eliminated the weak link of high-speed asynchronous power generator double-fed system gear up, has improved the reliability of unit greatly, reduces maintenance workload; Because equipment is few, arrange compact.Because the generator unit stator winding is connected with electrical network by the current transformer of incoming frequency wider range, the generator rated frequency can reduce, and makes the motor number of pole-pairs be reduced to reasonable value.From the principle synchronous generator adopt excitation-type and magneto can, but because of the excitation-type volume is bigger, efficient is lower, also needs a cover excitation device, so lessly use in wind power generating set.In addition, magneto alternator does not have brush and slip ring, helps to improve reliability yet, reduces maintenance workload.The shortcoming of the straight drive system of low-speed permanent-magnet synchronous generator is: its low-speed permanent-magnet generator volume is big, and current transformer will be carried the generator full power, so its motor and current transformer price are all than high-speed asynchronous power generator double-fed system height.
The third is half a straight drive system of single-stage raising speed+middling speed magneto alternator, and it mainly is made of one-level raising speed gear-box+middling speed magneto alternator+full power convertor.It is the compromise proposal between high-speed asynchronous power generator double-fed system and the straight drive system of low-speed permanent-magnet synchronous generator, utilize one-level gear raising speed, the motor rated speed is raised to a high value, its number of pole-pairs is reduced, significantly reduced the volume and the cost of magneto alternator, and gear-box is simple, volume is little, reliable, easy to maintenance.This scheme cabin is less, arranges very compact.Its frequency variator also is the full power frequency variator, needs to carry the full power of generator.
More than in the drive system of three kinds of wind-driven generators, the third drive system is that of development potentiality is arranged most in high-power type.But because above three kinds of drive systems all adopt single generator, be difficult to regulate its operation under low wind speed, the efficient of power coefficient and drive system all can significantly reduce when hanging down wind speed.Simultaneously, owing to adopt single generator, the current transformer that it is supporting and the size of gear-box all will be with the watt level couplings of generator, for 5MW and above wind power generating set, the research and development of its generator, current transformer and gear-box, manufacturing, transportation, installation, maintenance cost all will improve greatly, limit the development of these three kinds of drive systems to a certain extent.
In order to address these problems, the someone has proposed the variable speed drive system of multiple generator combination generating.
The scheme that existing variable speed drive system adopts is that selection is a kind of as architecture basics in above-mentioned three kinds of drive systems, increase one or more generator and constitute drive system with the speed rotation, it adopts the form of high-power generator and small power generator combination generating, generator is incorporated into the power networks by converter plant mostly, switches wind energy utilization and generating efficiency to improve each wind speed section when different wind speed between many generators.
For example: China Patent No. ZL200820110240.7, authorize publication number CN201260146Y, June 17 2009 notice of authorization day, the name of innovation and creation is called the hybrid type wind power generating set, this disclosure of the Invention a kind of coaxial double-generator Variable Speed Wind Power Generator, its drive system is to have increased a small power generator and the current transformer supporting with it on the architecture basics of high-speed asynchronous power generator double-fed system, be characterized in: double-fed generator is connected with the rotor coaxial of small power generator after gear-box is connected with wheel hub, the rotor-side of double-fed generator is connected with current transformer, the stator side of small power generator is connected with current transformer, and two generators are connected with electrical network by two current transformers are independent respectively.Its advantage is: when hanging down wind speed, by switching to small power generator and corresponding little current transformer, make Transmitted chains efficient keep higher level; When wind speed reached rated wind speed, blade can keep best tip speed ratio to a certain extent, and it is best that power coefficient keeps under most of situation.Its deficiency is: raising speed gear-box speed ratio is big, load is heavy, change fluctuation greatly and frequent with wind speed, cost height, fatiguability damage; Equipment is many, the cabin is big, arranges not compact; Wound asynchronous motor has brush and slip ring, influences reliability, increases maintenance workload; The double-fed generator rotating speed is in the upper and lower two changes of direction of synchronous speed, excursion is restricted, though can reduce the capacity of current transformer, but when carrying out the switching of small power generator and double-fed generator, the torque of the double-fed generator variation of can't starting from scratch, the total torque of two generators must have jump when switching, can not realize the constant the best of power coefficient.
And for example: Chinese patent publication number CN101257214A, open day on September 3rd, 2008, the name of innovation and creation is called large-sized variable speed permanent magnetism wind power generation system, the drive system of this patent is to have increased a small-power magneto alternator on the architecture basics of half straight drive system of single-stage raising speed+middling speed magneto alternator, be characterized in: the rotor coaxial of two generators connects after gear-box is connected with wheel hub, has only disposed the inverter that is complementary with small power generator.Its deficiency is: when the switching of carrying out between small power generator and the high-power generator, has only an inverter that is complementary with small power generator, can only regulate the torque of a generator, and the torque of high-power generator can not be regulated arbitrarily, so certainly exist the jump of torque when switching, reduced the efficient of power coefficient and drive system.And, by wind-drive, only depend on machinery to become magneto alternator that oar regulates directly to be incorporated into the power networks and can not to realize substantially.
More than the common issue with that exists of two kinds of drive systems be: 1, two generators all are connected with wheel hub by gear-box, and gear-box is high rate of fault parts, and generator set must quit work and overhaul when gearbox fault; 2, when carrying out the switching of small power generator and high-power generator, the torque of generator can't realize starting from scratch and change continuously, the total torque of two generators always has jump when switching, can not realize the power coefficient optimization, and can impact to main shaft and electrical network.
Summary of the invention:
The model utility purpose: the utility model provides a kind of MW class Variable Speed Wind Power Generator of multiple generator flexible combination, its objective is the following problem that solves: 1, the problem that reduces of power coefficient and the efficient when low wind speed of single generator Variable Speed Wind Power Generator in the past; 2, single generator Variable Speed Wind Power Generator in the past, for 5MW and above wind power generating set, the problem that the research and development of its generator, current transformer and gear-box, manufacturing, transportation, installation, maintenance cost improve greatly; 3, multiple generator Variable Speed Wind Power Generator in the past, its two generators all are connected with wheel hub by gear-box, and generator set must be shut down the problem of maintenance when gearbox fault; 4, multiple generator Variable Speed Wind Power Generator in the past, when the switching of carrying out between the generator, the total torque of generator always has jump, can not realize the power coefficient optimization, and the problem that can impact to main shaft and electrical network.
Technological scheme: the utility model is achieved through the following technical solutions:
A kind of MW class Variable Speed Wind Power Generator of multiple generator flexible combination is characterized in that: described generator set mainly comprises pylon, base, low-speed permanent-magnet synchronous generator, middling speed magneto alternator, current transformer, yaw system, pitch-controlled system and blade-carrying wheel hub; Described blade-carrying wheel hub is connected with the low-speed permanent-magnet synchronous generator, and the low-speed permanent-magnet synchronous generator is connected with the middling speed magneto alternator by one-level raising speed gear-box; Low-speed permanent-magnet synchronous generator, one-level raising speed gear-box and middling speed magneto alternator are arranged on the base, and base is arranged on the pylon; Described low-speed permanent-magnet synchronous generator and middling speed magneto alternator pass through separately independently respectively, and current transformer inserts electrical network.
The output terminal of described low-speed permanent-magnet synchronous generator is connected with one-level raising speed gear-box by the coupling that can disconnect.
The entire machine design range of capacity of described generator set is for being not less than 5MW.
Advantage and effect: the utility model provides a kind of MW class Variable Speed Wind Power Generator of multiple generator flexible combination, and described generator set mainly comprises pylon, base, low-speed permanent-magnet synchronous generator, middling speed magneto alternator, current transformer and blade-carrying wheel hub; Described blade-carrying wheel hub is connected with the low-speed permanent-magnet synchronous generator, and the low-speed permanent-magnet synchronous generator is connected with the middling speed magneto alternator by one-level raising speed gear-box; Low-speed permanent-magnet synchronous generator, one-level raising speed gear-box and middling speed magneto alternator are arranged on the base, and base is arranged on the pylon; Described low-speed permanent-magnet synchronous generator and middling speed magneto alternator pass through separately independently in use respectively, and current transformer inserts electrical network.
Adopt the beneficial effect of technique scheme to be:
1, adopt multiple generator speed change scheme, power coefficient and generator efficiency significantly improve when hanging down wind speed;
2, use multiple generator, single generator capacity is reduced, for the Large-scale Wind Turbines more than the 5MW, the research and development of its generator, frequency variator and gear-box, manufacturing, transportation, installation, maintenance cost significantly reduce;
3, gear-box is located between low-speed permanent-magnet synchronous generator and the middling speed magneto alternator, and the output shaft of low-speed permanent-magnet synchronous generator is connected with one-level raising speed gear-box by the coupling that can disconnect, when gearbox fault, can disconnect itself and being connected of low-speed permanent-magnet synchronous generator, guarantee that wind energy conversion system still can generate electricity when gearbox fault;
4, low-speed permanent-magnet synchronous generator and middling speed magneto alternator respectively by separately independently full power convertor be connected with electrical network, switching between two generators realizes flexible the switching by the torque of full power convertor reasonable distribution, make the total torque of generator in the operating air velocity scope, satisfy the rule of setting curve, in conjunction with the control of pitch-controlled system to propeller pitch angle, realize the power coefficient optimization, and can not impact main shaft and electrical network.
5, drive system is taked the mode of half straight drive system combination of the straight drive system of low-speed permanent-magnet synchronous generator and single-stage raising speed+middling speed magneto alternator, the advantage of having gathered two kinds of schemes: its generator all is a permagnetic synchronous motor, there are not brush and slip ring, help to improve reliability, reduce maintenance workload.Utilize one-level gear raising speed, the motor rated speed is raised to a high value, its number of pole-pairs is reduced, significantly reduced the volume and the cost of middling speed magneto alternator, and gear-box is simple, volume is little, reliable, easy to maintenance.Simultaneously, the low-speed permanent-magnet synchronous generator is a small power generator, rounds 1/5 to 1/3 of machine capacity, thereby has reduced the diameter of generator, has avoided the shortcoming of the straight drive system of low-speed permanent-magnet synchronous generator.This kind arrangement makes the engine room inside structure very compact, improved cabin space and utilized interest rate, and position of centre of gravity is reasonable, has increased the stability in cabin.
This model utility is simple for structure, and rationally practical, system stability is reliable, and wind-powered electricity generation conversion efficiency height relatively is beneficial on a large scale and applies.
Description of drawings:
Fig. 1 is an an embodiment's of the present utility model structural representation;
Fig. 2 is the partial sectional view of Fig. 1;
Fig. 3 is an an embodiment's of the present utility model running principle block diagram;
Fig. 4 is a power of the present utility model.
1. wheel hubs among the figure, 2. pitch-controlled system, 3. blade, 4. low-speed permanent-magnet synchronous generator, 5. base, 6. gear-box, 7. the damping device of gear-box, 8. yaw system, 9. middling speed magneto alternator, 10. pylon, 11. full power convertor, 12. full power convertors, 13. electrical networks, 14. the axis of low-speed permanent-magnet synchronous generator, 15. the stator of low-speed permanent-magnet synchronous generator, the rotor of 16. middling speed magneto alternators, 17. can disconnect coupling, 18. coupling, the damping device of 19. middling speed magneto alternators.
Embodiment: the utility model is described further below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model provides a kind of MW class Variable Speed Wind Power Generator of multiple generator flexible combination, and described generator set mainly comprises pylon 10, base 5, low-speed permanent-magnet synchronous generator 4, middling speed magneto alternator 9, current transformer and has the wheel hub 1 of blade 3; The described wheel hub 1 that has blade 3 is connected with low-speed permanent-magnet synchronous generator 4, and low-speed permanent-magnet synchronous generator 4 is connected with middling speed magneto alternator 9 by one-level raising speed gear-box 6; Low-speed permanent-magnet synchronous generator 4, one-level raising speed gear-box 6 and middling speed magneto alternator 9 are arranged on the base 5, and base 5 is arranged on the pylon 10; Described low-speed permanent-magnet synchronous generator 4 and middling speed magneto alternator 9 pass through separately independently in use respectively, and full power convertor 11,12 inserts electrical networks 13; Realize flexible the switching by full power convertor 11,12 reasonable distribution torques between two generators.Described base 5 is arranged on the base 5 by yaw system 8; In described wheel hub 1, also be provided with pitch-controlled system 2.The output terminal of described low-speed permanent-magnet synchronous generator 4 is connected with one-level raising speed gear-box 6 by the coupling 17 that can disconnect.The entire machine design range of capacity of described generator set is for being not less than 5MW.Described low-speed permanent-magnet synchronous generator 4 is a small power generator, is taken as 1/5 to 1/3 of complete machine capacity, and described middling speed magneto alternator 9 is a high-power generator, is taken as complete machine capacity 2/3 to 4/5.
Saying more more specifically, low-speed permanent-magnet synchronous generator 4 is fixedly mounted on the front end of base 5, the front end of the axis 14 of low-speed permanent-magnet synchronous generator 4 and wheel hub 1 coaxial fixedlying connected, rotor 16 coaxial the fixedlying connected of the stage casing of the axis 14 of low-speed permanent-magnet synchronous generator 4 and low-speed permanent-magnet synchronous generator wherein, axis 14 rear ends of low-speed permanent-magnet synchronous generator 4 are connected with the input shaft of gear-box 6 is coaxial by disconnecting coupling 17; Gear-box 6 is installed on the base 5 by damping device 7 supports of gear-box, and the damping device 7 of described gear-box is installed on the sidewall of base 5; The output shaft of described gear-box 6 is fixedlyed connected with the input shaft of middling speed magneto alternator 9; The damping device 19 of middling speed magneto alternator 9 by the middling speed magneto alternator support be installed in base 5 on, the damping device 19 of described magneto alternator also is arranged on the sidewall of base 5; The input shaft of described middling speed magneto alternator 9 is connected by coupling 18 with the output shaft of gear-box 6.
Between described base 5 and pylon 10, also be provided with yaw system 8.That is to say that yaw system 8 is installed on base 5 bottoms, the top of pylon 10; Part on the yaw system 8 just base 5 and the rotation of all members by yaw system 8 that be arranged on the base 5 drives, will be around pylon 10 rotations.
The controlling method of the MW class Variable Speed Wind Power Generator of multiple generator flexible combination, concrete steps as follows:
(1), the control step of power increase:
A, when wind speed is higher than the incision wind speed of described generator set, low-speed permanent-magnet synchronous generator 4 is connected to the grid 13, by with supporting current transformer 11 its rotating speeds of control of low-speed permanent-magnet synchronous generator 4, make blade 3 remain best tip speed ratio, allow power coefficient keep best;
B, along with wind speed continue to increase, when low-speed permanent-magnet synchronous generator 4 power reach the rated power of himself, middling speed magneto alternator 9 is connected to the grid 13,4 torques of low-speed permanent-magnet synchronous generator reduce gradually up to withdrawing from is incorporated into the power networks, 9 torques of middling speed magneto alternator increase gradually up to the rated power operation that reaches self, in this process, by controlling its torque, make total torque respectively according to the curvilinear motion of setting with the supporting separately current transformer of low-speed permanent-magnet synchronous generator 4 and middling speed magneto alternator 9;
C, when the power of middling speed magneto alternator 9 reaches rated power, low-speed permanent-magnet synchronous generator 4 is connected to the grid once more, 4 torques of low-speed permanent-magnet synchronous generator are constantly risen up to nominal torque, 9 torques of middling speed magneto alternator progressively reduce up to nominal torque, after this two generator speeds increase synchronously, in this process, its total torque changes according to setting curve all the time;
D, after two generator synchronous speed reach rated speed, regulate propeller pitch angles by pitch-controlled system 2, keep invariablenes turning speed constant, power constantly increases;
E, when the total output of two generators is higher than rated power, regulate propeller pitch angles by pitch-controlled system 2 and carry out power control, keep power constant;
(2), the control step of power reduction:
A, when wind speed reduces, regulate propeller pitch angles by pitch-controlled system 2, keep invariablenes turning speed constant, power constantly reduces;
B, when the total output of two generators is lower than rated power, the synchronization of two generators of control reduces, power constantly reduces;
The torque of c, low-speed permanent-magnet synchronous generator 4 constantly reduces is incorporated into the power networks up to withdrawing from, and 9 torques of middling speed magneto alternator progressively increase up to middling speed magneto alternator 9 and reach rated power, and total torque changes along setting curve; At this moment, middling speed magneto alternator 9 isolated operations;
D, along with wind speed continues to reduce, when wind wheel power is reduced to the power of low-speed permanent-magnet synchronous generator 4, low-speed permanent-magnet synchronous generator 4 is connected to the grid 13, the torque of low-speed permanent-magnet synchronous generator 4 increases gradually, 9 torques of middling speed magneto alternator reduce gradually up to withdrawing from is incorporated into the power networks, and makes total torque according to the curvilinear motion of setting.
After e, middling speed magneto alternator 9 withdraw from electrical network, 4 isolated operations of low-speed permanent-magnet synchronous generator, along with wind speed reduces, torque reduces thereupon, makes power coefficient keep best.
The curve of above-described setting is meant realizes the power coefficient the optimum state, guarantees the curve of best tip speed ratio.
Embodiment 1:
Be an object lesson of the present utility model below, so that its principle of more detailed explanation.
If complete machine rated power is 5MW, the incision wind speed is 2.5m/s, rated speed 13rpm, and length of blade 61m, rotor diameter are 124m, the pylon height is 106m; Low-speed permanent-magnet synchronous generator, rated power are 2MW, and rated wind speed is 10m/s, directly are connected with wheel hub, and progression is 160; Middling speed magneto alternator, rated power are 3MW, and rated wind speed is 12m/s, and one-level step-up gear speed increasing ratio is 1:25, and the generator synchronous speed is 325rpm, and progression is 18.
Its running schematic representation is as shown in Figure 3:
(1), the control step of power increase:
When wind speed is higher than incision wind speed 2.5m/s, low-speed permanent-magnet synchronous generator 4 is connected to the grid, by with supporting current transformer 11 its rotating speeds of control of low-speed permanent-magnet synchronous generator 4, make blade remain best tip speed ratio, it is best that power coefficient keeps;
Along with wind speed continues to increase, when low-speed permanent-magnet synchronous generator 4 power reach rated power 2MW, middling speed magneto alternator 9 is connected to the grid, 4 torques of low-speed permanent-magnet synchronous generator reduce gradually up to withdrawing from is incorporated into the power networks, 9 torques of middling speed magneto alternator increase gradually up to rated power operation, in this process, respectively by controlling its torque with the supporting separately current transformer of two generators, make total torque according to the curvilinear motion of setting, to keep best tip speed ratio, realize that power coefficient remains the best.
When the power of middling speed magneto alternator 9 reaches rated power 3MW, low-speed permanent-magnet synchronous generator 4 is connected to the grid once more, 4 torques of low-speed permanent-magnet synchronous generator are constantly risen up to nominal torque, 9 torques of middling speed magneto alternator progressively reduce up to nominal torque, after this two generator speeds increase synchronously, in this process, its total torque changes according to as shown in Figure 3 setting curve all the time, to realize power coefficient the best.
After two generator synchronous speed reach rated speed, regulate propeller pitch angle by pitch-controlled system 2, keep invariablenes turning speed constant; Power constantly increases;
When the total output of two generators is higher than rated power, regulate propeller pitch angle by pitch-controlled system and carry out power control, keep power constant;
(2), the control step of power reduction: its under powered process is opposite with above-mentioned process, as Fig. 3:
When wind speed reduces, regulate propeller pitch angle by pitch-controlled system 2, keep invariablenes turning speed constant, power constantly reduces;
When the total output of two generators was lower than rated power, the synchronization of two generators of control reduced, and power constantly reduces;
The torque of low-speed permanent-magnet synchronous generator 4 constantly reduces is incorporated into the power networks up to withdrawing from, and 9 torques of middling speed magneto alternator progressively increase up to middling speed magneto alternator 9 and reach rated power, and total torque changes along setting curve; At this moment, middling speed magneto alternator 9 isolated operations;
Along with wind speed continues to reduce, when wind wheel power is reduced to the power of low-speed permanent-magnet synchronous generator 4, low-speed permanent-magnet synchronous generator 4 is connected to the grid 13, the torque of low-speed permanent-magnet synchronous generator 4 increases gradually, 9 torques of middling speed magneto alternator reduce gradually up to withdrawing from is incorporated into the power networks, and makes total torque according to the curvilinear motion of setting.
After middling speed magneto alternator 9 withdraws from electrical network, 4 isolated operations of low-speed permanent-magnet synchronous generator, along with wind speed reduces, torque reduces thereupon, makes power coefficient keep best.
The curve of above-described setting is meant and guarantees best tip speed ratio, to realize the curve of power coefficient the optimum state.
Fig. 4 is a power of the present utility model, and the expression meaning of each symbol shown in the figure is: Vc: low-speed permanent-magnet synchronous generator incision wind speed; V1: middling speed magneto alternator incision wind speed; V2: low-speed permanent-magnet synchronous generator cut-out wind speed; V3: the low-speed permanent-magnet synchronous generator is cut wind speed once more; V4: the initial wind speed in the synchronous speedup of two generators district; Vp: wind energy conversion system rated wind speed.
Among Fig. 4, after the power curve stack of the power curve of the low-speed permanent-magnet synchronous generator of 2MW and the middling speed magneto alternator of 3MW promptly is overall power curve, as can be seen, owing to adopted flexible switching, the power curve continuously smooth of 5MW, be that the complete machine variable power is steady, can not impact main shaft and electrical network.
This model utility is simple for structure, and rationally practical, system stability is reliable, and wind-powered electricity generation conversion efficiency height relatively is beneficial on a large scale and applies.

Claims (3)

1. the MW class Variable Speed Wind Power Generator of a multiple generator flexible combination, it is characterized in that: described generator set mainly comprises pylon (10), base (5), low-speed permanent-magnet synchronous generator (4), middling speed magneto alternator (9), current transformer, yaw system (8), pitch-controlled system (2) and has the wheel hub (1) of blade (3); The described wheel hub (1) that has blade (3) is connected with low-speed permanent-magnet synchronous generator (4), and low-speed permanent-magnet synchronous generator (4) is connected with middling speed magneto alternator (9) by one-level raising speed gear-box (6); Low-speed permanent-magnet synchronous generator (4), one-level raising speed gear-box (6) and middling speed magneto alternator (9) are arranged on the base (5), and base (5) is arranged on the pylon (10); Described low-speed permanent-magnet synchronous generator (4) and middling speed magneto alternator (9) pass through separately independently respectively, and current transformer inserts electrical network.
2. the MW class Variable Speed Wind Power Generator of multiple generator flexible combination according to claim 1 and 2 is characterized in that: the output terminal of described low-speed permanent-magnet synchronous generator (4) is connected with one-level raising speed gear-box (6) by the coupling (17) that can disconnect.
3. the MW class Variable Speed Wind Power Generator of multiple generator flexible combination according to claim 1 and 2 is characterized in that: the entire machine design range of capacity of described generator set is for being not less than 5MW.
CN2009202722187U 2009-11-17 2009-11-17 Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors Expired - Lifetime CN201526421U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202722187U CN201526421U (en) 2009-11-17 2009-11-17 Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202722187U CN201526421U (en) 2009-11-17 2009-11-17 Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors

Publications (1)

Publication Number Publication Date
CN201526421U true CN201526421U (en) 2010-07-14

Family

ID=42517709

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202722187U Expired - Lifetime CN201526421U (en) 2009-11-17 2009-11-17 Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors

Country Status (1)

Country Link
CN (1) CN201526421U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101737266B (en) * 2009-11-17 2012-05-09 沈阳华人风电科技有限公司 Megawatt-level variable speed wind generating set featuring flexible combination of multiple electric generators and control method thereof
CN104948385A (en) * 2015-06-26 2015-09-30 上海交通大学 Variable-pitch control method for increasing power generation amount of wind power generation unit in constant rated speed region
CN112576333A (en) * 2020-12-30 2021-03-30 无锡得瑞动力科技有限公司 Pressurizing lubricating oil way system of generator set
CN113107774A (en) * 2021-04-12 2021-07-13 上海电气风电集团股份有限公司 Wind generating set and assembling method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101737266B (en) * 2009-11-17 2012-05-09 沈阳华人风电科技有限公司 Megawatt-level variable speed wind generating set featuring flexible combination of multiple electric generators and control method thereof
CN104948385A (en) * 2015-06-26 2015-09-30 上海交通大学 Variable-pitch control method for increasing power generation amount of wind power generation unit in constant rated speed region
CN104948385B (en) * 2015-06-26 2018-02-09 上海交通大学 Improve the pitch control method of generated energy in Wind turbines perseverance rated speed region
CN112576333A (en) * 2020-12-30 2021-03-30 无锡得瑞动力科技有限公司 Pressurizing lubricating oil way system of generator set
CN113107774A (en) * 2021-04-12 2021-07-13 上海电气风电集团股份有限公司 Wind generating set and assembling method thereof

Similar Documents

Publication Publication Date Title
CN101737266B (en) Megawatt-level variable speed wind generating set featuring flexible combination of multiple electric generators and control method thereof
CN101440783B (en) Operation control method of wind power generation
Polinder Overview of and trends in wind turbine generator systems
CN101660499B (en) Grid-connected hybrid-driven variable-pitch variable-speed constant-frequency wind turbine generator set
CN201730751U (en) Megawatt-level vertical axis wind driven generator with adjustable angle of attack
CN201496204U (en) Grid-connected hybrid-driven variable-pitch variable-speed constant frequency wind turbine generator system
CN101001036B (en) Variable speed constant frequency wind-mill generator and its excitation control system
CN102116264A (en) Megawatt-stage vertical shaft wind power generator with adjustable attack angle
CN101839218A (en) Direct-drive wind generating set
CN201526421U (en) Megawatt variable-speed wind driven generator set of flexible combination of plurality of motors
CN1976178B (en) Variable speed constant frequency excitation control system
CN201687658U (en) Fixed-propeller pitch and direct-drive wind power generating device
CN100546169C (en) Telescope double rotor fan speed changing, frequency converting exciting method
CN201802563U (en) Full-power squirrel-cage set wind power generation apparatus
CN202250614U (en) Novel direct-drive permanent magnet type wind-driven power generator unit
CN201513295U (en) Direct-drive wind generator set
CN201004589Y (en) Serial dual rotor wind power generator and its rate-varying and excitation-varying system
CN201802564U (en) Half direct-driving and full-power wind power generating device
CN104500328A (en) Two-end direct-driven type wind-driven generator
CN204419449U (en) Two ends direct wind-driven generator
CN100535434C (en) Tandem type wind electrical motor with dual rotors, and speed changing, frequency converting excitation system
CN100495899C (en) Double-rotor variable speed and variable frequency power generator
CN201425001Y (en) 1.5-MW permanent magnet direct-drive wind-driven power generator unit
CN200980032Y (en) Series connection double rotor variable-speed frequency-conversion excitation wind motor
CN1976180B (en) Variable speed variable frequency pneumatic electric machine and excitation control system

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
AV01 Patent right actively abandoned

Granted publication date: 20100714

Effective date of abandoning: 20091117