CN119102976A - Wind power generation system that makes electrically excited synchronous wind turbines rotate at a constant speed - Google Patents
Wind power generation system that makes electrically excited synchronous wind turbines rotate at a constant speed Download PDFInfo
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- CN119102976A CN119102976A CN202411243673.XA CN202411243673A CN119102976A CN 119102976 A CN119102976 A CN 119102976A CN 202411243673 A CN202411243673 A CN 202411243673A CN 119102976 A CN119102976 A CN 119102976A
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- gear
- ring
- sun gear
- output shaft
- impeller
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 52
- 238000010248 power generation Methods 0.000 title claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 59
- 230000005284 excitation Effects 0.000 abstract description 36
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000033228 biological regulation Effects 0.000 description 15
- 238000004804 winding Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/0276—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling rotor speed, e.g. variable speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D15/00—Transmission of mechanical power
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a wind power generation system for enabling an electric excitation synchronous generator to rotate at a constant rotation speed, which solves the problems of improving the power supply quality and the power grid friendliness of wind power generation, and comprises an impeller (1), the electric excitation synchronous generator (4), a variable frequency speed regulating motor (3), a frequency converter, an electric controller and a three-phase alternating current power grid, wherein the electric excitation synchronous generator is electrically connected with the three-phase alternating current power grid, the variable frequency speed regulating motor is electrically connected with the three-phase alternating current power grid through the frequency converter, a gear box speed regulating mechanism (2) is mechanically connected between the impeller (1) and a rotation shaft of the electric excitation synchronous generator (4), the gear box speed regulating mechanism consists of an outer gear ring (5), a ring-shaped planet carrier (6), a sun gear (7) and a pinion (8), the rotation speed difference between the rotation speed of the impeller (1) and the outer gear ring of the planet carrier is equal to the rotation speed of a sun gear output shaft (14), and the manufacturing cost of the motor is reduced, and the operation and maintenance cost of the motor in the later stage is reduced.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind power generation system which realizes stable wind power generation frequency through mechanical power split based on planetary gear speed regulation.
Background
At present, in the technical field of wind power generation, two common technical routes are mainly adopted, wherein the first is a mode of adopting a gearbox and a double-fed asynchronous motor and then adding slip power conversion; the second mode adopts a gearbox and a permanent magnet synchronous motor and then adds a full-power conversion mode, wherein a wind driven generator host in the first mode adopts a double-fed asynchronous motor, the motor rotor is powered by a three-phase power grid for supplying power to a frequency converter, the frequency converter is connected with a three-phase winding of a double-fed motor rotor after frequency conversion, the rotating speed of a magnetic field generated by the three-phase winding of the rotor is changed through the frequency converter, thereby realizing the stability of the power generation frequency of the stator winding, the structure is provided with a three-phase slip ring and carbon brush structure on the rotor, the slip ring and the carbon brush are easy to damage and the maintenance cost is high, when the wind driven generator in the second mode adopts the permanent magnet synchronous motor, the full-power frequency converter is arranged between the wind driven generator and a power grid, the stability of the output power supply frequency is realized through the full-power frequency converter, the problem that the full-power frequency converter is too high in cost, in addition, the permanent magnet motor is easy to demagnetize due to overheat, the strong excitation capability and reactive power supporting capability of the permanent magnet synchronous motor are poor, the voltage crossing capability of the permanent magnet synchronous motor is limited by the capacity of the frequency converter, the double-asynchronous motor is greatly increased in the transient voltage mutation of the rotor, the permanent magnet synchronous motor is easy to cause the transient voltage of the rotor to be damaged, the wind driven generator is greatly increased, the defects of the permanent magnet synchronous motor is seriously damaged, the wind power generator is seriously damaged, the wind driven generator is low in the manufacturing cost, the power generator is low in the power generation cost, and the power generation system is seriously, and the service quality is low in the power system, and the like, improving the power supply quality and the power grid friendliness become a great problem to be solved in the wind power technology field.
Disclosure of Invention
The invention provides a wind power generation system for enabling an electric excitation synchronous wind driven generator to rotate at a constant rotation speed, which solves the technical problems of how to improve the power supply quality and the power grid friendliness of wind power generation.
The invention solves the technical problems by the following technical proposal:
In the wind power generation system, a brushless electric excitation synchronous generator is adopted in the wind power generator, a planetary gear speed regulating gear box is arranged between an impeller and a rotor of the wind power generator, a compensation speed regulating system is arranged in the gear box through a mechanical structure according to the change of the rotation speed of the impeller, when the rotation speed of the impeller is higher, the compensation speed regulating system carries out speed reduction treatment on the impeller, and when the rotation speed of the impeller is lower, the compensation speed regulating system carries out speed increasing treatment on the impeller, so that the rotation speed of an output shaft of the planetary gear speed regulating gear box is constant, the rotation speed of the rotor of the wind power generator is constant, and the voltage frequency generated by the wind power generator is kept at the fixed frequency required by a power grid.
A wind power generation system enabling an electric excitation synchronous wind driven generator to rotate at a constant rotation speed comprises an impeller, an electric excitation synchronous generator, a variable frequency speed regulating motor, a frequency converter, an electric controller and a three-phase alternating current power grid, wherein the electric excitation synchronous generator is electrically connected with the three-phase alternating current power grid, the variable frequency speed regulating motor is electrically connected with the three-phase alternating current power grid through the frequency converter, a gear box speed regulating mechanism is mechanically connected between the impeller and a rotating shaft of the electric excitation synchronous generator, the gear box speed regulating mechanism consists of an outer gear ring, a ring-shaped planetary carrier, a sun gear and a pinion, annular inner teeth are arranged on the inner side surface of the ring-shaped ring of the outer gear ring, a speed regulating gear box input shaft is connected to the left end side surface of the outer gear ring, a planet carrier base body of the ring-shaped planetary carrier is an annular plate, planetary gear shafts are arranged on the left annular vertical surface of the ring-shaped planetary carrier at equal intervals, planetary gear shafts are arranged at equal intervals at 120 radians, three planetary gear shafts are arranged on the circumference of a concentric circle, a planetary gear is movably arranged on each planetary gear shaft, a planetary gear is fixedly arranged on the right annular vertical surface of the ring-shaped planetary carrier, an outer gear ring of the sun gear is fixedly arranged on the sun gear, an output shaft is fixedly connected with the ring of the ring-shaped planetary carrier, an output shaft is fixedly arranged on the sun gear, the sun gear is fixedly connected with the sun gear, the sun gear is movably connected with the outer ring, the sun gear is meshed with the outer ring, and is meshed with the outer gear is arranged on the sun gear, and is movably arranged on the sun gear, and is meshed with the outer ring, and has the sun gear is meshed with the sun gear, the pinion shaft on the pinion is mechanically connected with the output shaft of the variable-frequency speed-regulating motor.
The impeller is provided with an impeller rotating speed sensor, the sun gear output shaft is provided with a sun gear output shaft rotating speed sensor, the output shaft of the variable-frequency speed regulating motor is provided with a variable-frequency speed regulating motor output shaft rotating speed sensor, the impeller rotating speed sensor, the sun gear output shaft rotating speed sensor and the variable-frequency speed regulating motor output shaft rotating speed sensor are respectively electrically connected with an electric controller, and the electric controller is electrically connected with the frequency converter.
A regulation and control method for enabling an electric excitation synchronous generator to rotate at a constant rotating speed is achieved through a wind power generation system enabling the electric excitation synchronous generator to rotate at the constant rotating speed, an impeller rotates under the action of wind power, an input shaft of a speed regulation gear box drives an outer gear ring to synchronously rotate, the outer gear ring drives three planetary gears to synchronously rotate through annular inner teeth, the three planetary gears drive a sun gear output shaft to synchronously rotate through meshing with a sun gear, the sun gear output shaft is mechanically connected with a rotating shaft of the electric excitation synchronous generator, the electric excitation synchronous generator is driven to rotate in a synchronous mode, and electricity generated by the electric excitation synchronous generator is sent to a three-phase alternating current network;
if the rotation speed of the impeller is increased, the electric controller controls the variable frequency speed regulating motor to rotate through the frequency converter, the variable frequency speed regulating motor drives the pinion to rotate through the output shaft of the variable frequency speed regulating motor, and the pinion is meshed with the outer gear ring of the planet carrier to enable the annular planet carrier to rotate in the direction opposite to the rotation speed direction of the impeller, so that the rotation speed of the output shaft of the sun gear is reduced, and the rotation speed increasing part of the impeller is counteracted;
if the rotation speed of the impeller is reduced, the electric controller controls the variable frequency speed regulating motor to rotate in the opposite direction through the frequency converter, the variable frequency speed regulating motor drives the pinion to rotate in the opposite direction through the output shaft of the variable frequency speed regulating motor, and the pinion is meshed with the outer gear ring of the planet carrier to enable the annular sheet-shaped planet carrier to rotate in the same direction as the rotation speed direction of the impeller, so that the rotation speed of the output shaft of the sun gear is increased, and the rotation speed reduction part of the impeller is compensated.
The speed difference between the impeller and the planet carrier outer gear is equal to the speed of the sun gear output shaft, the speed of the planet carrier outer gear is dynamically regulated according to the change of the impeller under the condition of keeping the speed of the sun gear output shaft constant, the regulation of the speed of the planet carrier outer gear is realized by regulating the speed of a variable-frequency speed regulating motor, and the regulation of the speed of the variable-frequency speed regulating motor is realized by an electric controller through a frequency converter.
The invention creatively provides a novel wind power generation technical route, which carries out slip speed regulation through the external variable frequency speed regulation motor of the planetary gear speed regulation gear box, so that the rotation speed output to the motor side is kept at constant synchronous speed, and the electric excitation synchronous motor is adopted as a wind power generator, thereby reducing the manufacturing cost of the motor and the operation and maintenance cost in the later stage, further realizing the great reduction of the cost of wind power generation, and in addition, the electric excitation synchronous motor is adopted as the wind power generator, further effectively improving the power supply quality and solving the problems of poor forced excitation capability and reactive support capability of the permanent magnet synchronous generator and the doubly-fed asynchronous generator.
Drawings
FIG. 1 is a schematic view of a wind power generation system of the present invention;
Fig. 2 is a schematic structural view of the gear box speed regulating mechanism 2 of the present invention;
fig. 3 is a schematic structural view of the external ring gear 5 of the present invention;
fig. 4 is a schematic structural view of the annular plate-like carrier 6 of the present invention;
Fig. 5 is a diagram showing the fit relationship between the annular plate-shaped carrier 6 and the planetary gear 12;
Fig. 6 is a schematic structural view of the sun gear 7 of the present invention;
Fig. 7 is a diagram showing the relationship between the ring plate carrier 6 and the sun gear 7 according to the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the wind power generation system for enabling the electric excitation synchronous wind power generator to rotate at a constant rotation speed comprises an impeller 1, an electric excitation synchronous generator 4, a variable frequency speed regulating motor 3, a frequency converter, an electric controller and a three-phase alternating current power grid, wherein the electric excitation synchronous generator 4 is electrically connected with the three-phase alternating current power grid, the variable frequency speed regulating motor 3 is electrically connected with the three-phase alternating current power grid through the frequency converter, a gear box speed regulating mechanism 2 is mechanically connected between the impeller 1 and a rotating shaft of the electric excitation synchronous generator 4, and the gear box speed regulating mechanism 2 consists of an outer gear ring 5, a ring-shaped planetary carrier 6, a sun gear 7 and a pinion 8; an annular internal tooth 9 is arranged on the inner side surface of an annular ring of an external tooth ring 5, a speed regulation gear box input shaft 10 is connected with the left end side surface of the external tooth ring 5, a basal body of a ring-shaped planetary carrier 6 is an annular plate, a planetary gear shaft 11 is arranged on the left annular vertical surface of the ring-shaped planetary carrier 6 at equal intervals of 120 radians, three planetary gear shafts 11 are arranged on the circumference of a concentric circle, a planetary gear 12 is movably arranged on each planetary gear shaft 11, a planetary carrier external tooth ring 13 is fixedly arranged on the right annular vertical surface of the ring-shaped planetary carrier 6, a sun gear output shaft 14 is fixedly connected with the right vertical surface of the sun gear 7, a sun gear 7 is movably arranged in the external tooth ring 5, a ring-shaped planetary carrier 6 is movably sleeved on the sun gear output shaft 14 on the right side of the sun gear 7, each planetary gear 12 on the left annular vertical surface of the ring-shaped planetary carrier 6 is respectively meshed with the annular 9 and the sun gear 7 arranged on the external tooth ring 5, the sun gear output shaft 14 is connected with a rotating shaft of an electric excitation synchronous generator, the pinion gear 8 is meshed with the planet carrier external gear ring 13, and a pinion shaft on the pinion gear 8 is mechanically connected with an output shaft of the variable-frequency speed regulating motor 3.
The impeller 1 is provided with an impeller rotating speed sensor, the sun gear output shaft 14 is provided with a sun gear output shaft rotating speed sensor, the output shaft of the variable frequency speed regulating motor 3 is provided with a variable frequency speed regulating motor output shaft rotating speed sensor, and the impeller rotating speed sensor, the sun gear output shaft rotating speed sensor and the variable frequency speed regulating motor output shaft rotating speed sensor are respectively and electrically connected with an electric controller, and the electric controller is electrically connected with the frequency converter.
A regulation and control method for enabling an electric excitation synchronous generator to rotate at a constant rotating speed is realized through a wind power generation system enabling the electric excitation synchronous generator to rotate at the constant rotating speed, an impeller 1 rotates under the action of wind power, the impeller 1 drives an outer gear ring 5 to synchronously rotate through a speed regulation gear box input shaft 10, the outer gear ring 5 drives three planetary gear wheels 12 to synchronously rotate through annular inner teeth 9, the three planetary gear wheels 12 drive a sun gear wheel output shaft 14 to synchronously rotate through meshing with a sun gear wheel 7, the sun gear wheel output shaft 14 is mechanically connected with a rotating shaft of the electric excitation synchronous generator 4, the electric excitation synchronous generator 4 is synchronously driven to rotate for power generation, and power generated by the electric excitation synchronous generator 4 is transmitted to a three-phase alternating current network;
If the rotation speed of the impeller 1 increases, the electric controller controls the variable frequency speed regulating motor 3 to rotate through the frequency converter, the variable frequency speed regulating motor 3 drives the pinion 8 to rotate through the output shaft of the variable frequency speed regulating motor, the pinion 8 rotates the annular sheet-shaped planet carrier 6 in the direction opposite to the rotation speed direction of the impeller 1 through meshing with the planet carrier outer gear ring 13, so that the rotation speed of the sun gear output shaft 14 is reduced, and the rotation speed increasing part of the impeller 1 is counteracted;
If the rotation speed of the impeller 1 decreases, the electric controller controls the variable frequency speed-adjusting motor 3 to rotate reversely through the frequency converter, the variable frequency speed-adjusting motor 3 drives the pinion 8 to rotate reversely through the output shaft of the variable frequency speed-adjusting motor, the pinion 8 rotates the annular sheet-shaped planet carrier 6 along the same direction as the rotation speed direction of the impeller 1 through meshing with the outer ring gear 13 of the planet carrier, and the rotation speed of the sun gear output shaft 14 increases, so that the rotation speed reduction part of the impeller 1 is compensated.
The difference between the rotation speed of the impeller 1 and the rotation speed of the planet carrier outer gear ring 13 is equal to the rotation speed of the sun gear output shaft 14, the rotation speed of the planet carrier outer gear ring 13 is dynamically regulated according to the change of the rotation speed of the impeller 1 under the condition of keeping the rotation speed of the sun gear output shaft 14 constant, the regulation of the rotation speed of the planet carrier outer gear ring 13 is realized by regulating the rotation speed of the variable-frequency speed motor 3, and the regulation of the rotation speed of the variable-frequency speed motor 3 is realized by an electric controller through a frequency converter.
The invention relates to a gear box speed regulating mechanism, which is characterized in that an impeller 1 absorbs wind energy to generate rotation to generate torque, a gear box speed regulating mechanism 2 carries out slip speed regulation through an external variable frequency speed regulating motor 3, so that the rotating speed output to an electric excitation synchronous motor 4 can be kept constant, the variable frequency speed regulating motor 3 comprises an asynchronous motor, a synchronous motor, a permanent magnet motor, a reluctance motor and the like, the variable frequency speed regulating motor 3 is only used for slip speed regulation, so that the capacity of the variable frequency speed regulating motor is far smaller than the rated power of a generator, the capacity of a frequency converter connected with the variable frequency motor is relatively smaller, the cost of the frequency converter is further reduced, the electric excitation synchronous motor 4 can be in a brush structure or a brushless structure, even if a brush structure is adopted, a rotor winding is only used for excitation of a synchronous generator, the failure rate in the later period is far lower than that of a doubly fed wind driven generator, no matter the brush failure rate is adopted, the electric excitation synchronous motor 4 can be always kept consistent with the power of a power grid, no matter the brush or the brushless structure is adopted, the direct grid connection of the variable frequency regulating mechanism can be realized, the gear box speed regulating mechanism 2 is provided with three rotating speed interfaces respectively connected with the impeller 1, the variable frequency regulating motor 3 and the electric excitation synchronous motor 4, the gear box 4, the electric excitation synchronous motor 4 can be in a brush structure, the electric power is used as an output gear wheel machine, the output of a gear wheel and a gear wheel machine through the output shaft of a sun gear 1, and a sun gear 4, and a power generator is connected with an output gear 1, and a power transmission gear 12 is used as an output from a synchronous gear 1to a sun gear machine through a sun gear 2, and a power generator, and a power transmission gear 2, and a power 1, and a transmission gear a power 1.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411243673.XA CN119102976A (en) | 2024-09-05 | 2024-09-05 | Wind power generation system that makes electrically excited synchronous wind turbines rotate at a constant speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411243673.XA CN119102976A (en) | 2024-09-05 | 2024-09-05 | Wind power generation system that makes electrically excited synchronous wind turbines rotate at a constant speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119102976A true CN119102976A (en) | 2024-12-10 |
Family
ID=93720322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411243673.XA Pending CN119102976A (en) | 2024-09-05 | 2024-09-05 | Wind power generation system that makes electrically excited synchronous wind turbines rotate at a constant speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119102976A (en) |
-
2024
- 2024-09-05 CN CN202411243673.XA patent/CN119102976A/en active Pending
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