CN100585987C - Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator - Google Patents
Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator Download PDFInfo
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- CN100585987C CN100585987C CN200810024558A CN200810024558A CN100585987C CN 100585987 C CN100585987 C CN 100585987C CN 200810024558 A CN200810024558 A CN 200810024558A CN 200810024558 A CN200810024558 A CN 200810024558A CN 100585987 C CN100585987 C CN 100585987C
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- 230000010363 phase shift Effects 0.000 claims description 2
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Abstract
A direct-driven electric excitation double convex pole fault-tolerant wind-driven generator belongs to the wind-driven generator. The wind-driven generator is composed of two parts of a multi-pole electric excitation double convex pole electric motor and a power device. The unit electric motor are divided into C groups (C>=3). The number of each group of unit electric motor is same. The three-phase winding of each group of unit electric motor is inverted to 120 degree step wave alternating current by the full-bridge inverter respectively after the commutation of the rectification circuit. The phase displacement between the step wave alternating current outputted by the inverters of each group of unit electric motor is 90/C degree electrical degree. When the outputs of inverter of each group of unit electric motor have been series-connected the load is provided with alternating current, the generator can still work normally after the occurring of fault and satisfies the high-reliability request of the wind-driven generator and at the same time has the advantages of low switching frequency of the amplifier tube of the inverter, small electric voltage and current stress, small distortion factor of the power-line voltage and small cubic weight.
Description
One, technical field
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention belongs to wind-driven generator.
Two, technical background
Wind-powered electricity generation is the clean energy, can reduce the consumption and the environmental pollution of traditional fossil energy, develops wind-powered electricity generation energetically to improving energy resource structure, and it is significant to preserve the ecological environment.At present, wind generating technology is to high efficiency, and is highly reliable, and direction develops cheaply.Direct wind-driven generator saves gear box, has small investment, and the driving-chain loss is few, and the low and reliability advantages of higher of maintenance cost is subjected to domestic and international extensive concern.
The direct wind-driven generator of having reported mainly contains magneto alternator, three kinds of brushless double feed alternating current generator and switch reluctance generators.Dynamo-electric machine (the Doubly Salient Electro magneticGenerator of electric excitation dual protrusion, be called for short DSEM) be the New-type electric machine that on the basis of switch reluctance generator, grows up, its stator and rotor are biconvex utmost point lamination, it is simple and reliable for structure to have kept switch reluctance generator, advantages of cheap price.Stator or rotor are Duoed a cover excitation winding than switched reluctance machines, and regulating the excitation winding electric current is the scalable output voltage, and need not position transducer and active power converter during generating work, have application potential in directly driven wind-powered occasion.
The rotating speed of high-capacity direct driving type aerogenerator is lower, has the advantages that diameter is big and number of poles is many.The 11.1KW permanent magnet direct driving motor of external report, number of pole-pairs is 94, the 10MW permanent magnet direct driving motor, its number of pole-pairs reaches 160.The basic structure pattern of the dynamo-electric machine of three-phase electricity excitation biconvex is 6/4 structure, and promptly stator poles is 6, and the rotor number of poles is 4, and wherein the basic structure pattern is also referred to as the unit motor.Different with conventional motor, the stator poles p of multipole electric excitation biconvex electrode electric machine
sWith rotor number of poles p
rBe the integral multiple of unit motor stator and rotor number of poles, i.e. p
s/ p
r=6k/4k, k=1,2,3 ... positive integer, when k=1, motor is unit motor (6/4 structure), and when k=2, the stator poles of motor is 12, and the rotor number of poles is 8, is 12/8 structure.Existing document is only studied 6/4 structure (k=1) and 12/8 structure (k=2) double salient-pole electric machine.(number of patent application: unit motor 200710191018.4) is 6/ (4 (N+1)) structure to three phase 6 k/(4 (N+1) k) structure biconvex pole electromotor.Its stator slot width is wide greater than the stator polar arc, and the rotor core number of poles allows to strengthen every Polar armature winding size greater than the stator core number of poles, enlarge the excitation winding placement space, reduce the stator interelectrode magnetic leakage, improve motor working efficiency, improve motor performance to be applicable to different application occasion needs.
The phase winding electromotive force harmonic wave of electric excitation dual protrusion pole generator is abundant, and near 120 degree square waves, if use voltage distortion degree height as alternating current generator.Prior art adopts the series connection of homophase armature winding and provides direct current through diode rectification to load, and this moment, the electric excitation dual protrusion pole generator was a DC generator.For being incorporated into the power networks to the AC load power supply or with the AC distribution center, electric excitation is directly driven biconvex pole wind power generator must output AC.Therefore, at the direct-drive wind power generation occasion, and in conjunction with the design feature of multipole double salient-pole electric machine, the Rational structure of seeking the direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of highly reliable and output AC voltage becomes original intention of the present invention.
Three, summary of the invention
The objective of the invention is: overcome the deficiencies in the prior art, propose the direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of highly reliable and output AC voltage.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention, comprise multipole electric excitation biconvex electrode electric machine and power device two parts composition, the stator poles of electric excitation biconvex electrode electric machine is 6k/4Nk with cooperating of rotor number of poles, wherein 6/4N is the unit motor, and N is the natural number except that 3 and 3 multiple.K is the number of repetition of unit motor, is also referred to as the number of poles of electric excitation biconvex electrode electric machine, and when k=1, electric excitation dual protrusion is the 6/4N structure very, and promptly stator poles is 6, and the rotor number of poles is 4N, is the unit motor; When k=2, electric excitation dual protrusion is the 12/8N structure very, and motor is made of two unit motors, and promptly stator poles is 12, and the rotor number of poles is 8N; When k=3, electric excitation dual protrusion is the 18/12N structure very, and motor is made of three unit motors, and promptly stator poles is 18, and the rotor number of poles is 12N; When k=4, electric excitation dual protrusion is the 24/16N structure very, and motor is made of four unit motors, and promptly stator poles is 24,16N; Electric excitation biconvex electrode electric machine is a multi-polar structure when k 〉=3.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention, the stator and rotor sructure pattern of motor can be external rotor internal stator structures, also can be the external stator inner rotor cores, also can be double-stator structure and dual-rotor structure.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention constitutes (k 〉=3) by k unit motor, and its k unit motor is divided into C group (C 〉=3), and every group of unit motor number is identical.The excitation winding of unit motor series connection on the same group, by the pwm converter excitation, the homophase windings in series of unit motor on the same group, constitute the threephase armature winding, after full-bridge inverter is reverse into 120 ° of staircase waveform alternating currents, rectification circuit can be full-bridge rectification and halfwave rectifier to three phase windings of unit motor through the rectification circuit rectification on the same group.Phase shift theta successively between the inverter of the unit motor output staircase waveform alternating current on the same group not
CDegree electrical degree, wherein θ
CEqual 90/C degree electrical degree.The inverter of unit motor output series connection back loading does not provide alternating current on the same group, and motor pole number is many more, and the total harmonic distortion that improves alternating current to load is low more.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention is divided into into C group unit motor, and wherein G group unit motor breaks down arbitrarily, then makes the excitation winding electric current of fault group unit motor reduce to zero, makes fault group inverter be output as zero.Adjust the angle of phase displacement θ of the individual non-fault group inverter output staircase waveform of residue (C-G) then
C-G, make θ
C-GEqual 90/ (C-G) degree electrical degree.Improve the exciting current of the unit motor in (C-G) individual non-fault group simultaneously, make output voltage reach rated value, the realization system is operate as normal once more.Owing to when the particularity of electric excitation biconvex electrode electric machine magnetic excitation circuit, the excitation winding electric current of fault group unit motor reduce to zero, can not have influence on the excitation field of the excitation winding of non-fault group unit motor.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention, compared with prior art, can realize the output of electric excitation biconvex electrode electric machine alternating current, and still can operate as normal after motor breaks down, satisfy the high reliability request of wind-driven generator, the power tube switching frequency that also has inverter simultaneously is low, and voltage and current stress is little, the supply power voltage distortion factor is little, the advantage that the volume weight of output filter is little.
Four, description of drawings
Fig. 1 is the structural representation (direction of arrow is represented the excitation field direction that excitation winding produces among the figure) of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator.
Fig. 2 is the winding connection layout of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator.
Fig. 3 is the main oscillogram of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator.
Fig. 4 is an excitation field magnetic pole schematic diagram (direction of arrow is represented the excitation field direction that excitation winding produces among the figure) after a phase winding of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator breaks down.
Fig. 5 is a main oscillogram after a phase winding of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator breaks down.
Above-mentioned number in the figure title:
A
i, X
iThe A phase stator poles of (i=1,2,3,4)-i unit motor, wherein A
iArmature winding electromotive force and X on the stator poles
iArmature winding electromotive force on the stator poles differs 180 degree;
B
i, Y
iThe B phase stator poles of (i=1,2,3,4)-i unit motor, wherein B
iArmature winding electromotive force and Y on the stator poles
iArmature winding electromotive force on the stator poles differs 180 degree;
C
i, Z
iThe C phase stator poles of (i=1,2,3,4)-i unit motor, wherein C
iArmature winding electromotive force and Z on the stator poles
iArmature winding electromotive force on the stator poles differs 180 degree;
W
FjThe excitation winding of (j=1,2,3,4)-j group unit motor;
D
J1, D
J2, D
J3(j=1,2,3,4)-be the three phase rectifier diode of j group unit motor;
Q
J1, Q
J2, Q
J3, Q
J4(j=1,2,3,4)-be the inverter switching device pipe of j group unit motor;
D
Fj(j=1,2,3,4)-be the excitation winding fly-wheel diode of j group unit motor;
Q
Fj(j=1,2,3,4)-be the excitation winding switching tube of j group unit motor;
U
Cj(j=1,2,3,4)-be the inverter output voltage of j group unit motor;
U
O1-be that each organizes inverter series connection output voltage;
U
o-to U
O1Voltage after the filtering;
L-is the output voltage filter inductance;
U
o-be the output voltage filter capacitor.
Five, embodiment
Because it is similar that motor pole number k equals 4 direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator structure more than or equal to 3 direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator and motor pole number k, (k=4, N=1) the direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator illustrates concrete execution mode with 24/16 structure below.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention comprises multipole electric excitation biconvex electrode electric machine and power device two parts composition.Multipole electric excitation biconvex electrode electric machine be 24/16 structure (k=4, N=1), promptly stator poles is 24, the rotor number of poles is 16, is made of 4 6/4 construction unit motors, as shown in Figure 1, the direction of arrow is represented the excitation field direction that excitation winding produces among the figure.The individual 6/4 construction unit motor of 4 (C=4) of the multipole electric excitation biconvex electrode electric machine of 24/16 structure is divided into 4 groups, every group of 1 unit motor.The stator of the 1st group of unit motor is A very
1, B
1, C
1, X
1, Y
1, Z
1Six stator poles, armature winding is sleeved on the stator poles, wherein A
1, X
1Belong to A phase stator poles, the armature winding on the A phase stator poles belongs to A phase winding, A
1Armature winding electromotive force and X on the stator poles
1Armature winding electromotive force on the stator poles differs 180 degree (being that phase place is opposite); B
1, Y
1Belong to B phase stator poles, the armature winding on the B phase stator poles belongs to B phase winding, B
1Stator poles armature winding electromotive force and Y
1Stator poles armature winding electromotive force differs 180 degree; C
1, Z
1Belong to C phase stator poles, the armature winding on the C phase stator poles belongs to C phase winding, C
1Stator poles armature winding electromotive force and Z
1Stator poles armature winding electromotive force differs 180 degree.The principle that the homophase armature winding of the 1st group of unit motor is pressed electromotive force to be increased is connected the back earlier through rectifier diode D
11, D
12, D
13The half-wave rectifying circuit that constitutes is rectified into direct current, after switching tube Q
11, Q
12, Q
13, Q
14The 1st group of unit motor full-bridge inverter that constitutes is reverse into 120 degree staircase waveform alternating current U
C1, W
F1Be the excitation winding of the 1st group of unit motor, regulate excitation winding W
F1Exciting current be that the 1st group of unit motor full-bridge inverter of scalable is reverse into 120 degree staircase waveform alternating current U
C1Amplitude.In like manner, the homophase armature winding of the 2nd group of unit motor is pressed the principle series connection back of electromotive force increase earlier through rectifier diode D
21, D
22, D
23The half-wave rectifying circuit that constitutes is rectified into direct current, after switching tube Q
21, Q
22, Q
23, Q
24The 2nd group of unit motor full-bridge inverter that constitutes is reverse into 120 degree staircase waveform alternating current U
C2The principle that the homophase armature winding of the 3rd group of unit motor is pressed electromotive force to be increased is connected the back earlier through rectifier diode D
31, D
32, D
33The half-wave rectifying circuit that constitutes is rectified into direct current, after switching tube Q
31, Q
32, Q
33, Q
34The 3rd group of unit motor full-bridge inverter that constitutes is reverse into 120 degree staircase waveform alternating current U
C23, the principle that the homophase armature winding of the 4th group of unit motor is pressed electromotive force to be increased is connected the back earlier through rectifier diode D
41, D
42, D
43The half-wave rectifying circuit that constitutes is rectified into direct current, after switching tube Q
41, Q
42, Q
43, Q
44The 4th group of unit motor full-bridge inverter that constitutes is reverse into 120 degree staircase waveform alternating current U
C4, as shown in Figure 2.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention, the inverter of its 4 groups of unit motors are full-bridge inverter, wherein switching tube Q
J1, Q
J3(j=1,2,3,4) constitutes the leading-bridge of j group unit motor full-bridge inverter, switching tube Q
J2, Q
J4(j=1,2,3,4) constitutes the lagging leg of j group unit motor full-bridge inverter, and the unit motor inverter is not connected by the rule that leading-bridge connects lagging leg on the same group, and the voltage of series connection output is designated as U
O1, as shown in Figure 2.Above-mentioned alternating current U
C1, U
C2, U
C3And U
C4Phase shift 90/4=22.5 degree electrical degree, i.e. θ successively
C=22.5 ° of electrical degrees, output voltage U
O1For containing the alternating current of high order harmonic component, as shown in Figure 3, voltage U
O1After the process filtering is sinusoidal ac U
o, power to the load.The direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator is applied in directly driven wind-powered occasion, and the number of poles of motor is many, with the increase of motor pole number, voltage U
O1Total harmonic distortion low more, needed filtering sense L and filtering capacity C are also more little, even can save.
Direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator of the present invention, the execution mode that the unit motor in some groups breaks down is with wherein 1 group of execution mode that breaks down is identical, and breaking down with the 1st group of unit motor below is that example describes.When the 1st group of unit electric motor units motor breaks down, make the excitation winding W of the 1st group of unit motor
F1Electric current reduce to zero, this moment, six stator poles of the 1st group of unit motor did not have excitation field, as shown in Figure 4, the direction of arrow is represented the excitation field direction that excitation winding produces among the figure, the electromotive force of winding induction also is zero, and then the direct voltage of three phase winding rectifications of the 1st group of unit motor output and inverter output voltage are zero.Remain the angle of phase displacement θ of 3 non-fault group inverter output staircase waveforms
C-G=90/ (4-1)=30 degree electrical degree, voltage U
O1By non-fault group inverter output voltage U
C2, U
C3And U
C4Synthetic, still be one to contain the alternating current of high order harmonic component, as shown in Figure 5.Improve the exciting current of the unit motor excitation winding in 3 non-fault groups of residue simultaneously, make output voltage U
oReach rated value, the realization system is operate as normal once more.
Claims (1)
1, a kind of direct-driving electric excitation double-salient pole fault-tolerance wind-driven generator, comprise multipole electric excitation biconvex electrode electric machine and power device two parts, the stator poles of multipole electric excitation biconvex electrode electric machine is 6k/ (4Nk) with cooperating of rotor number of poles, wherein 6/ (4N) is the unit motor, N is the natural number except that 3 and 3 multiple, k is the number of poles of electric excitation biconvex electrode electric machine, it is characterized in that, the number of poles k of electric excitation biconvex electrode electric machine is more than or equal to 3, its unit motor is divided into the C group, every group of unit motor number is identical, the excitation winding of unit motor series connection on the same group, by the pwm converter excitation, the homophase windings in series of unit motor constitutes three phase windings on the same group, on the same group three phase windings of unit motor through the rectification circuit rectification after full-bridge inverter is reverse into 120 ° of staircase waveform alternating currents, wherein rectification circuit is full-bridge rectification or halfwave rectifier, not phase shift theta successively between the inverter of the unit motor output staircase waveform alternating current on the same group
CDegree electrical degree, wherein θ
CEqual 90/C degree electrical degree, the inverter of unit motor output series connection back does not provide alternating current to load on the same group, described C 〉=3, described C group unit motor, when central any G group unit motor breaks down, then make the excitation winding electric current of fault group unit motor reduce to zero, make the inverter of fault group unit motor be output as zero, adjust the inverter output staircase waveform angle of phase displacement θ of the residue non-fault group unit motor of C-G
C-G, make θ
C-GEqual 90/ (C-G) degree electrical degree, improve the exciting current of the residue non-fault group unit motor of C-G simultaneously, make output voltage reach rated value, the realization system is operate as normal once more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810024558A CN100585987C (en) | 2008-03-26 | 2008-03-26 | Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810024558A CN100585987C (en) | 2008-03-26 | 2008-03-26 | Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator |
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| CN101247065A CN101247065A (en) | 2008-08-20 |
| CN100585987C true CN100585987C (en) | 2010-01-27 |
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| CN200810024558A Expired - Fee Related CN100585987C (en) | 2008-03-26 | 2008-03-26 | Direct-driving electric excitation double-salient pole fault-tolerance aerogenerator |
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| CN101789641A (en) * | 2010-03-09 | 2010-07-28 | 南京航空航天大学 | Electro-magnetic flux switching motor |
| CN102638116A (en) * | 2012-03-27 | 2012-08-15 | 北京交通大学 | Multi-phase permanent-magnet high-voltage wind driven generator and system thereof |
| CN102891577B (en) * | 2012-10-19 | 2015-07-15 | 东风汽车公司 | Switch reluctance motor |
| CN103683686A (en) * | 2013-11-19 | 2014-03-26 | 南京航空航天大学 | Permanent magnet brushless DC power generator rectification method and permanent magnet brushless DC power generator |
| CN103812294B (en) * | 2014-01-08 | 2016-08-17 | 南京航空航天大学 | A kind of five phase double salient-pole electric machines |
| CN103795313B (en) * | 2014-02-17 | 2016-04-13 | 南通大学 | The wind turbine generator that fault tolerant runs |
| CN105450112B (en) * | 2014-02-17 | 2017-09-12 | 南通大学 | The wind generator system of the phased structure of independence with fault-tolerant operation ability |
| CN104779760B (en) * | 2015-03-25 | 2017-05-17 | 南京航空航天大学 | Low-torque pulse electrically-excited double-salient brushless DC (Direct Current) motor and control system thereof |
| CN104682645A (en) * | 2015-03-27 | 2015-06-03 | 许昌学院 | Wind driven generator rectification method and wind driven generator |
| CN105162271B (en) * | 2015-08-21 | 2018-09-28 | 南京高传机电自动控制设备有限公司 | Stator excitation wind-driven generator |
| CN105576698B (en) * | 2016-01-05 | 2018-09-14 | 南通大学 | Fault-tolerance aerogenerator group Energy Management System based on multiple agent and method |
| CN106712424A (en) * | 2016-12-07 | 2017-05-24 | 北京工业大学 | A rotation motor having unit combination modes |
| CN107896038B (en) * | 2017-10-31 | 2020-07-28 | 南京航空航天大学 | Double-winding hybrid excitation brushless direct current integrated power generation system and control method thereof |
| CN109599962B (en) * | 2018-11-30 | 2020-06-30 | 浙江大学 | Double salient pole motor of new phase splitting form |
| CN110518587B (en) * | 2019-06-13 | 2023-12-26 | 江苏经纬轨道交通设备有限公司 | Phase shift control method, system and device for multiple converter system and storage medium |
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