CN100417008C - Speed changing constant frequency method of wind force generation - Google Patents
Speed changing constant frequency method of wind force generation Download PDFInfo
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- CN100417008C CN100417008C CNB2005100227711A CN200510022771A CN100417008C CN 100417008 C CN100417008 C CN 100417008C CN B2005100227711 A CNB2005100227711 A CN B2005100227711A CN 200510022771 A CN200510022771 A CN 200510022771A CN 100417008 C CN100417008 C CN 100417008C
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Abstract
The present invention discloses a speed change constant frequency method of wind force generation, which is characterized in that firstly, the rotary speed of a wind turbine rotor (1) is increased by an increasing gearbox (2), and then the input power (Pw) produced by speed change is inputted to an input shaft (10) of a differential permanent magnet motor (3); a differential mechanism (30) of the differential permanent magnet motor (3) carries out power division or flow connection to generate power flow (Pg); a stator winding (11) entering the differential permanent magnet motor (3) realizes constant speed and constant frequency power generation to a power network (9) through a feeder (7). Compared with traditional speed change constant frequency methods, the method reduces the cost of generating equipment and obviously increases the generating efficiency of a generating system simultaneously.
Description
Technical field
The present invention relates to a kind of speed-changing constant frequency method of electricity generation system, particularly a kind of speed-changing constant frequency method of wind power generation,
Background technology
In the wind power generation process,, require the speed of input alternator shaft to change, i.e. speed change with wind speed for capturing wind energy to greatest extent; When wind-driven generator and electrical network parallel running, the electric energy frequency that requires generator to send again is consistent with the frequency of electrical network, i.e. constant frequency.But, at present in large-scale distributed electricity generation systems such as wind power generation, extensively the speed-changing constant frequency method that adopts mainly contains: cage type asynchronous generator variable speed constant frequency system, AC excitation double-fed generator variable speed constant frequency system, brushless double feed generator variable speed constant frequency system and permanent magnet generator variable speed constant frequency system etc.For the large-scale wind driven generator system, rheology mechanism in these variable speed constant frequency schemes is owing to adopt power loss that traditional rectification and inverse method caused mostly at 15%-20%, and the convertor equipment that need involve great expense, particularly megawatt-level permanent magnet generating set and convertor equipment thereof, so whole generating machine system configuration is huge and complicated, as adopt and reduce the power loss converter method, domestic technology neither be very ripe at present.
Summary of the invention
The speed-changing constant frequency method that the purpose of this invention is to provide a kind of wind power generation based on differential gear, the particularly a kind of differential permanent-magnet motor of two-freedom combination drive box of tricks and speed-changing constant frequency method of corresponding distributed wind power generation thereof of having, be characterized in, by variable speed constant frequency and combination drive, can significantly improve the generating efficiency of wind-driven generator, reduce system cost, and required variable speed constant frequency system and device cost is low, simple in structure.
For realizing above purpose, the present invention adopts following technical scheme to be achieved:
A kind of speed-changing constant frequency method of wind power generation, at first the rotating speed with the wind energy conversion system rotor passes through the step-up gear speedup, the power shaft of the input power input differential permanent-magnet motor that then speed change is produced, or the power shaft of the electric power stream input differential permanent-magnet motor that produces by the control motor powered, by the box of tricks of differential permanent-magnet motor carry out power dividing or interflow produce first generated output flow to stator winding into differential permanent-magnet motor through feeder line to grid generation.
In technique scheme, when the input power of wind energy conversion system rotor during greater than the rated power of differential permanent-magnet motor, input power enters box of tricks along the power shaft of differential permanent-magnet motor and carries out power dividing, produce first generated output stream and second generated output stream, first generated output stream is by the engagement of planet gear mesh ring gear, the stator winding that enters differential permanent-magnet motor through feeder line to the electrical network direct generation of electricity, second generated output stream by with the engagement of box of tricks planetary gear and central gear, flow out differential permanent-magnet motor and enter the control motor, and make the control electric power generation, input by inverter carries out current transformation then, converts electrical energy into the alternating current with the electrical network same frequency.
When the input power of wind energy conversion system rotor during less than the rated power of differential permanent-magnet motor, the controller control inverter makes the control motor powered, the electric power stream that allows the control motor produce flows into differential permanent-magnet motor, by the meshing planetary gear of the central gear of box of tricks, and first generated output stream that produces with the input power interflow that enters on the differential permanent-magnet motor power shaft, drive the rotor rotation by ring gear and make the generating of differential permanent-magnet motor constant-speed and constant-frequency, arrive electrical network via feeder line.
With power shaft in the differential permanent-magnet motor to the gearratio of box of tricks ring gear be designed to 20: 1～50: 1, can make the output and the input power stream of the control motor that the output shaft with differential permanent-magnet motor connects firmly account for 10% to 20% of differential permanent-magnet motor generating gross power, and the power output stream that makes stator coil on the differential permanent-magnet motor directly output to electrical network account for 90% to 80% of differential permanent-magnet motor 3 generating gross powers.
The invention has the advantages that: the variable speed constant frequency of realizing wind power system by the combination drive of two-freedom, this method adopts a power shaft of differential permanent-magnet motor to be connected the output revolving shaft of planet step-up gear respectively with an output shaft and controls the rotating shaft of motor, by the box of tricks of differential permanent-magnet motor, realize the direct constant frequency output of the electric energy of exhausted most share; Meanwhile, by the compensation adjustment of controller and inverter, realize that the speed change input of wind energy conversion system and the constant-speed and constant-frequency (50HZ) of generator export to the control motor speed.80% to 90% electric energy directly can be connected to the grid by generator thus, and be connected to the grid through (50Hz) after the AC-DC-AC unsteady flow after having only 10% to 20% electric energy to send alternating current by system control motor.
The present invention compares with traditional megawatt level wind power generation system speed-changing constant frequency method, owing to have only 10% to 20% electric energy by the rheology system, therefore reduce the cost of rheology system expensive to a great extent, thereby reduced the overall cost of wind generator system.Obviously, the variable speed constant frequency control method that this method is traditional relatively when reducing the generating equipment cost, also can significantly improve the generating efficiency of electricity generation system.
Description of drawings
Fig. 1 is a speed-changing constant frequency method schematic diagram of the present invention.
Fig. 2 is the differential permanent-magnet motor structure chart among Fig. 1.
Fig. 3 be among Fig. 2 A-A to cutaway view.
Fig. 4 is to be the connection block diagram of controller part of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples:
As shown in Figure 1, a kind of speed-changing constant frequency method of wind power generation,
1) adopts a differential permanent-magnet motor 3, its power shaft 10 is connected with the output revolving shaft of step-up gear 2 and the rotating shaft of control motor 4 with shaft coupling respectively with output shaft 23, simultaneously wind energy conversion system rotor 1 is connected with the input rotating shaft of step-up gear 2.
2) stator coil 11 with differential permanent-magnet motor 3 is electrically connected with electrical network 9 via power feeder 7: will control motor 4 usefulness power lines and be electrically connected with the input 33 of inverter 5: the output 8 of inverter 5 and power feeder 7 in parallel electrical connections, controller 6 is connected with inverter 5 signals.
3) rotating speed with wind energy conversion system rotor 1 passes through step-up gear 2 speedups, the power shaft 10 of the input power Pw input differential permanent-magnet motor 3 that then speed change is produced.As the input power Pw of wind energy conversion system rotor 1 during greater than the rated power of differential permanent-magnet motor 3, input power Pw enters the power shaft 10 of differential permanent-magnet motor 3, and the box of tricks 30 that passes through carries out power dividing, one tunnel power circuit Pg is by the engagement of 17 pairs of ring gears 16 of planetary gear, enter stator winding 11 direct generations of electricity of differential permanent-magnet motor 3, and arrive electrical network 9 through feeder line 7; Another road power circuit Ps (among Fig. 1 1.) is by box of tricks 30 planetary gears 17 and central gear 25 engagements, flow out differential permanent-magnet motor output shaft 23 and enter control motor 4, and control motor 4 is generated electricity, input 33 by inverter 5 carries out current transformation then, converts electrical energy into the alternating current with the electrical network same frequency.
4) rotating speed with wind energy conversion system rotor 1 passes through step-up gear 2 speedups, the power shaft 10 of the input power Pw input differential permanent-magnet motor 3 that then speed change is produced.As the input power Pw of wind energy conversion system rotor 1 during less than the rated power of differential permanent-magnet motor 3, make control motor 4 electronic with controller 6 control inverters 5, allow the power circuit Ps (among Fig. 1 2.) of control motor 4 flow into differential permanent-magnet motor 3, central gear 25 meshing planetary gears 17 by box of tricks 30, and form power circuit Pg with power P w interflow on differential permanent-magnet motor 3 power shafts 10, drive rotor 15 rotations by ring gear 16 and make the generating of differential permanent-magnet motor 3 constant-speed and constant-frequencies, arrive electrical network 9 via feeder line 7.
As Fig. 2, shown in Figure 3, differential permanent-magnet motor 3 of the present invention comprises cabinet 29, be arranged in the cabinet 29 axial both sides and the rolling bearing 24 that links to each other with power shaft 10, output shaft 23 respectively, be arranged on stator core 12 on cabinet 29 internal ring walls 27 and stator coil 11 thereof, be provided with rotor core ring 13 and be inlaid with the rotor 15 of permanent magnet 14 with respect to stator core 12 positions, and rotor 15 has been disposed radially box of tricks 30.
The ring gear 16 that box of tricks 30 comprises side plate 21, be fixed together with the permanent magnet 14 of rotor, have bearing 18 and with ring gear 16, be arranged on the meshing planetary gear 17 of central gear 25 on the output shaft 23, ring gear 16 is connected firmly by screw 26 and side plate 21; Planetary gear 17 is arranged on the planet carrier 19 by gear shaft 20; Planet carrier 19 connects firmly with power shaft 10; Side plate 21 is rolled by bearing 22 with planet carrier 19 and is connected.From the structure of Fig. 2 as can be known, the input of the power of the power shaft 10 of differential permanent-magnet motor 3 is constant, and it also is constant that the power of the differential permanent-magnet motor of being made up of ring gear 16 and permanent magnet 14, stator winding 11 etc. 3 is exported.Power circuit Ps on the control motor 4 flows into or outflow, and its two-way variation is to be adjusted by controller 6 and inverter 5 according to the size of wind energy conversion system rotor 1 rotating speed.Power shaft (10) in the differential permanent-magnet motor 3 is designed to 30: 1 to the gearratio of box of tricks (30) ring gear (16), can make the output and the input power stream Ps of the control motor 4 that the output shaft 23 with differential permanent-magnet motor 3 connects firmly account for about 12% of differential permanent-magnet motor 3 generating gross powers, and the power output stream Pg that makes stator coil 11 on the differential permanent-magnet motor 3 directly output to electrical network 9 account for about 88% of differential permanent-magnet motor 3 generating gross powers.
As shown in Figure 4, the power feeder and the motor side inverter 34 of control motor 4 directly link, and grid side inverter 35 is installed back-to-back with motor side inverter 34, and inverter 5 can four quadrant running.
The DSP digital processing chip 47 and 46 that controller 6 comprises symmetrically arranged signal acquisition circuit 44 and 41, gather prime treatment circuit 48 and 45 that output signals are connected with signal acquisition circuit 44,41 respectively, be connected with prime treatment circuit 48 and 45 outputs respectively by holding wire 53,51, the peripheral expansion control circuit 43 and 42 that is connected with 46 output signals with DSP digital processing chip 47 respectively, for the power module 49 that each circuit module is powered, be connected with communication interface circuit 50 signals that are incorporated into the power networks by serial signal line 51 between the DSP digital processing chip 47 and 46; Being connected with motor side sampling sensor group 32, grid side sampling sensor group 40 signals respectively of signal acquisition circuit 44,41; Peripheral expansion control circuit 43 and 42 control output signal are connected to motor side inverter 34 and grid side inverter 35 respectively.Motor side sampling sensor 32 can acquisition controlling motor 4 rotating speed, electric current and voltage etc.; Grid side sampling sensor 40 can be gathered grid side inverter 35 AC side line voltages and electric current, dc voltage and electric current etc.
Control by 6 pairs of inverters 5 of controller realizes the power flow direction (generating and electric double-way flow) of control motor 4 that the output shaft 23 with differential permanent-magnet motor 3 is connected firmly and the control of rotating speed size, and realize the constant speed of differential permanent-magnet motor is controlled, and then realize the constant frequency rate output of powerful magneto alternator.
Claims (3)
1. the speed-changing constant frequency method of a wind power generation, it is characterized in that, at first the rotating speed with wind energy conversion system rotor (1) passes through step-up gear (2) speedup, the input power (Pw) that speed change is produced is imported the power shaft (10) of differential permanent-magnet motor (3) then, or, carry out power dividing or interflow by the box of tricks (30) of differential permanent-magnet motor (3) and produce the stator winding (11) that first generated output stream (Pg) enters differential permanent-magnet motor (3) and electrical network (9) is generated electricity through feeder line (7) by the power shaft (10) of electric power stream (Ps 2.) the input differential permanent-magnet motor (3) of control motor (4) electronic generation; When the input power (Pw) of wind energy conversion system rotor (1) during greater than the rated power of differential permanent-magnet motor (3), input power (Pw) enters box of tricks (30) along the power shaft (10) of differential permanent-magnet motor (3) and carries out power dividing, produce first generated output stream (Pg) and second generated output stream (Ps 1.), first generated output stream (Pg) is by the engagement of planetary gear (17) to ring gear (16), the stator winding (11) that enters differential permanent-magnet motor (3) through feeder line (7) to electrical network (9) direct generation of electricity; Second generated output stream (Ps 1.) by with the engagement of box of tricks (30) planetary gear (17) with central gear (25), flow out differential permanent-magnet motor (3) and enter control motor (4), and control motor (4) is generated electricity, input (33) by inverter (5) carries out current transformation then, converts electrical energy into the alternating current with the electrical network same frequency.
2. the speed-changing constant frequency method of a wind power generation, it is characterized in that, at first the rotating speed with wind energy conversion system rotor (1) passes through step-up gear (2) speedup, the input power (Pw) that speed change is produced is imported the power shaft (10) of differential permanent-magnet motor (3) then, or, carry out power dividing or interflow by the box of tricks (30) of differential permanent-magnet motor (3) and produce the stator winding (11) that first generated output stream (Pg) enters differential permanent-magnet motor (3) and electrical network (9) is generated electricity through feeder line (7) by the power shaft (10) of electric power stream (Ps 2.) the input differential permanent-magnet motor (3) of control motor (4) electronic generation; When the input power (Pw) of wind energy conversion system rotor (1) during less than the rated power of differential permanent-magnet motor (3), make control motor (4) electronic with controller (6) control inverter (5), the electric power stream (Ps 2.) that allows control motor (4) produce flows into differential permanent-magnet motor (3), central gear (25) meshing planetary gear (17) by box of tricks (30), and first generated output stream (Pg) that produces with input power (Pw) interflow that enters on differential permanent-magnet motor (3) power shaft (10), drive rotor (15) rotation by ring gear (16) and make the generating of differential permanent-magnet motor (3) constant-speed and constant-frequency, arrive electrical network (9) via feeder line (7).
3. the speed-changing constant frequency method of wind power generation according to claim 1 and 2 is characterized in that, the power shaft (10) in the differential permanent-magnet motor (3) is 20: 1～50: 1 to the gearratio of box of tricks (30) ring gear (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227711A CN100417008C (en) | 2005-12-30 | 2005-12-30 | Speed changing constant frequency method of wind force generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100227711A CN100417008C (en) | 2005-12-30 | 2005-12-30 | Speed changing constant frequency method of wind force generation |
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| Publication Number | Publication Date |
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| CN1794562A CN1794562A (en) | 2006-06-28 |
| CN100417008C true CN100417008C (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100227711A Expired - Fee Related CN100417008C (en) | 2005-12-30 | 2005-12-30 | Speed changing constant frequency method of wind force generation |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976180B (en) * | 2006-12-14 | 2010-05-26 | 天津市新源电气科技有限公司 | Variable speed variable frequency pneumatic electric machine and excitation control system |
| CN101001036B (en) * | 2006-12-15 | 2010-05-26 | 天津市新源电气科技有限公司 | Variable-speed constant-frequency wind motor and excitation control system thereof |
| CN100464493C (en) * | 2007-03-13 | 2009-02-25 | 西安理工大学 | Pneumatic generating speed-changing frequency-constant method and apparatus based on digital-controlled flywheel hybrid driven |
| AT508052B1 (en) * | 2009-03-26 | 2011-01-15 | Hehenberger Gerald Dipl Ing | ENERGY EQUIPMENT, IN PARTICULAR WIND POWER PLANT |
| CN103138480B (en) * | 2011-06-24 | 2015-09-02 | 中国科学院电工研究所 | Wind power generation plant |
| CN102570951B (en) * | 2012-02-23 | 2014-06-11 | 苏州市职业大学 | Method for implementing variable speed and constant frequency of wind power generator by using supercapacitor |
| CN103758709A (en) * | 2013-04-07 | 2014-04-30 | 邓世平 | Wind generator |
| CN105119464A (en) * | 2015-08-13 | 2015-12-02 | 江苏磁谷科技股份有限公司 | Magnetic coupling shaft generation system and application of magnetic coupling shaft generation system in ship |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425111A (en) * | 1999-12-23 | 2003-06-18 | 罗曼+斯托尔特福特有限责任公司 | Transmission, especially for wind power installations |
| CN1427149A (en) * | 2002-11-13 | 2003-07-02 | 沈阳工业大学 | Megawatt grade speed veriable constant frequency wind electric generator set |
| JP2005036769A (en) * | 2003-07-18 | 2005-02-10 | Kunio Miyazaki | Wind power generation device |
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2005
- 2005-12-30 CN CNB2005100227711A patent/CN100417008C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425111A (en) * | 1999-12-23 | 2003-06-18 | 罗曼+斯托尔特福特有限责任公司 | Transmission, especially for wind power installations |
| CN1427149A (en) * | 2002-11-13 | 2003-07-02 | 沈阳工业大学 | Megawatt grade speed veriable constant frequency wind electric generator set |
| JP2005036769A (en) * | 2003-07-18 | 2005-02-10 | Kunio Miyazaki | Wind power generation device |
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| CN1794562A (en) | 2006-06-28 |
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Granted publication date: 20080903 Termination date: 20101230 |