CN218733285U - Synchronous wind generating set capable of being directly operated in grid-connected mode - Google Patents

Abstract

The utility model relates to a synchronous wind generating set of operation that can directly be incorporated into power networks belongs to the wind-powered electricity generation field. The wind turbine generator set comprises a wind turbine, a controllable integrated magnetic gear box and a converter system thereof, a synchronous wind driven generator and an excitation system thereof and the like; the wind turbine comprises an airflow speed increaser, an air guide part, a working part, an exhaust pipe and a yawing part; the controllable integrated magnetic gearbox comprises a controllable integrated coaxial magnetic gear, an input shaft and an output shaft, and the controllable integrated magnetic gearbox converter system comprises a controllable integrated coaxial magnetic gear converter and energy storage equipment; the synchronous wind driven generator excitation system comprises an excitation transformer, a rotor side converter, a bidirectional direct current converter and energy storage equipment. The utility model discloses need not the blade, need not lubricated, need not to untie the cable, can directly be incorporated into the power networks, greatly reduced transports fortune dimension cost realizes wind turbine generator system lightweight, miniaturization, low cost, high efficiency, has eliminated super large power wind turbine generator system's development bottleneck.

Description

Synchronous wind generating set capable of being directly operated in grid connection mode

Technical Field

The utility model relates to a wind generating set, especially a synchronous wind generating set that can directly be incorporated into power networks the operation belongs to wind power generation technical field.

Background

At present, almost all horizontal axis and vertical axis wind turbine generators need blades to convert wind energy into mechanical energy on one hand, and need a converter system to realize grid-connected operation on the other hand. The two factors cause the existing wind turbine generator set to have the following inherent defects:

firstly, taking a horizontal axis wind turbine as an example, each fan generally adopts 3 blades, each blade is long and heavy, the length of each blade is tens of meters to one hundred meters, the weight of each blade is tens of tons to tens of tons, the transportation is difficult, the installation is inconvenient, especially for a super-high power wind turbine, the blades are longer and heavier, the transportation, installation and operation difficulty is large, the cost is high, and the development of the wind turbine to super-high power is severely restricted.

Secondly, between the cut-in wind speed and the rated wind speed, in order to realize Maximum Power Point Tracking (MPPT), the rotating speed of the wind wheel must be adjusted according to the wind speed, so that the wind wheel works at the optimal working point, the control is complex, and meanwhile, a rotating part of the wind turbine bears high mechanical stress in the process of realizing the MPPT, so that the service life of the rotating part is shortened.

Thirdly, since the converter uses power electronic switching devices, a large number of harmonics are generated, and thus there are two inherent drawbacks: 1) The quality of grid-connected electric energy is reduced; 2) During the on-off period of the switching device, the current and the voltage are suddenly changed, so that the stator winding of the generator generates high voltage, the safe operation of the generator is seriously threatened, the insulation level of the generator must be improved, and the generator is high in cost and large in size.

Disclosure of Invention

The utility model discloses a main aim at: the utility model provides a not enough and blank to prior art, the utility model provides a high-power synchronous wind generating set that can direct grid-connected operation, its generator can adopt the direct grid-connected type synchronous generator of similar water and electricity usefulness, therefore can promote wind power generation system's electric energy quality greatly, energy saving and consumption reduction to improve system operation performance and reliability.

In order to achieve the above object, the utility model relates to a synchronous wind generating set of operation that can directly be incorporated into the power networks, include: the wind turbine, the controllable integrated magnetic gear box and a converter system thereof, the synchronous wind driven generator and an excitation system thereof and the tower frame.

The wind turbine comprises: the device comprises an airflow speed increaser, an air guide part, a working part, an exhaust pipe and a yaw part.

The air flow speed increaser is a horn-shaped pipeline, a large port of the air flow speed increaser is an air entraining port, air is blown in from the large port, and a small port of the air flow speed increaser is fixed with the air guide part.

The air guide part comprises an air guide circular tube, an air guide mechanism and a nozzle; the air guide mechanism comprises a guide vane and a rotating shaft mechanism, and the rotating shaft mechanism is used for adjusting the guide angle of the guide vane so as to change the size of the air flow; the guide vane, the rotating shaft mechanism and the nozzle are installed in the air guide circular tube, and the inlet end of the air guide circular tube is fixed with the small port of the airflow speed increaser.

The working parts comprise a rotating wheel, a main shaft bearing and a working circular pipe; the rotating wheel is arranged in the middle of the working circular tube; the main shaft is fixed with the rotating wheel, and the other end of the main shaft is fixed with a rotating shaft of the synchronous wind driven generator through a generator coupler; the main shaft bearing is sleeved on the outer side of the main shaft, is arranged at the joint of the working circular tube and the tower and bears the gravity and the radial thrust of the rotating wheel; the rotating wheel, the main shaft bearing, the generator coupler and the synchronous wind driven generator rotating shaft are all kept concentric; one end of the working circular tube is fixed with the air guide circular tube, and the other end of the working circular tube is fixed with the exhaust pipe.

The exhaust pipe is an open horn-shaped exhaust pipeline, a small port of the exhaust pipe is fixed with the working circular pipe of the working component, and a large port of the exhaust pipe is an exhaust port;

the yaw assembly includes: a tail vane and a yaw bearing; the tail vane is fixedly arranged at the rear end of the exhaust pipe, the yaw bearing is arranged at the joint of the working circular pipe and the tower, the outer ring of the yaw bearing is fixed with the tower, and the inner ring of the yaw bearing is sleeved outside the main shaft bearing and is fixed with the working circular pipe.

Further, to increase the airflow power and facilitate braking, the wind turbine may be equipped with a booster brake comprising two ducts: a first conduit and a second conduit; one end of the first pipeline is fixedly arranged in front of the outer part of the exhaust pipe, and the other end of the first pipeline is fixedly arranged in front of the outer part of the circular air guide pipe; one end of the second pipeline is fixedly arranged behind the outer part of the exhaust pipe, and the other end of the second pipeline is fixedly arranged behind the outer part of the airflow speed increaser.

Further, for a wind turbine with higher power, the yaw component can adopt a yaw system, and the yaw system comprises a large yaw gear ring, a lateral bearing, a yaw driving device and a yaw brake; the yaw large gear ring is fixed with the tower through bolts; the yaw driving device comprises a yaw motor, a speed reducer of the yaw motor and a small gear, the small gear is meshed with a large yaw gear ring, and the yaw driving device is fastened on a working circular pipe of the working component through a bolt. When the wind direction changes, the yaw driving device drives the working circular tube to rotate, and yaw wind alignment is achieved. The yaw system is a simplified version of the yaw system of the existing horizontal-axis wind turbine generator, and a yaw counter and a cable twisting protection device are not needed because the synchronous wind driven generator is vertically arranged in the tower frame and does not need to be untwisted.

The first effect of integrated magnetism gear box of controllable type is to realize the acceleration rate function, and it includes: the controllable integrated coaxial magnetic gear, the input shaft and the output shaft; the controllable integrated coaxial magnetic gear comprises: the magnetic control device comprises an outer rotor, an inner rotor, a magnetic regulation stator and a shell; the magnetic regulating stator comprises an armature winding and magnetic regulating core blocks which are uniformly distributed along the circumference, and the armature winding is a three-phase winding and is embedded between the magnetic regulating core blocks; the number of pole pairs of the armature winding is equal to the number of pole pairs of the outer rotor.

Further, if a medium-high speed synchronous wind driven generator is adopted, the controllable integrated magnetic gear box can be additionally provided with one-stage or two-stage coaxial magnetic gears behind the controllable integrated coaxial magnetic gears so as to realize high speed-increasing ratio.

The input shaft of the controllable integrated magnetic gear box is connected with the main shaft of the wind turbine through a coupler; and an output shaft of the controllable integrated magnetic gear box is fixed with a rotating shaft of the synchronous wind driven generator through a generator coupler.

The integrated magnetic gear case converter system of controllable type includes: the controllable integrated coaxial magnetic gear converter and the first energy storage device are arranged on the same side of the magnetic gear converter; the controllable integrated coaxial Magnetic Gear Converter (MGC) is a bidirectional AC/DC three-phase converter, the direct current side of the converter is connected with the first energy storage device, and the alternating current side of the converter is connected with the armature winding.

The second function of the controllable integrated magnetic gear box is to realize the frequency modulation function: the speed regulation is realized through the controllable integrated magnetic gearbox converter system, namely, the controllable integrated magnetic gearbox converter system regulates and controls the rotating speed of the synchronous wind driven generator to carry out frequency modulation, so that the output frequency of the synchronous wind driven generator is kept at the rated frequency of 50Hz, and direct grid connection is realized.

The synchronous wind power generator and the excitation system thereof comprise: a synchronous wind driven generator and an excitation system; the synchronous wind driven generator comprises a three-phase alternating current stator and a rotor with a direct current excitation winding, wherein the three-phase alternating current stator is connected with a power grid through a step-up transformer and is directly connected with the power grid; the direct-current excitation winding is powered by an excitation system; the excitation system comprises an excitation transformer, a rotor side converter, a bidirectional direct current converter and second energy storage equipment. The rotor side converter is a three-phase rectifier and is used for regulating and controlling the exciting current of the synchronous wind driven generator so as to control the stator voltage of the synchronous wind driven generator to have the same amplitude and the same phase with the grid voltage. The high-voltage side of the excitation transformer is connected with the stator of the synchronous wind driven generator, and the low-voltage side of the excitation transformer is connected with the alternating current side of the rotor-side converter; the direct current side of the rotor side converter is connected with a direct current excitation winding of the rotor of the synchronous wind driven generator; and one end of the bidirectional direct current converter is connected with the rotor direct current excitation winding of the synchronous wind driven generator, and the other end of the bidirectional direct current converter is connected with the second energy storage device.

The utility model has the advantages that:

1) The electromagnetic torque generated by the armature winding is flexibly changed by controlling the magnitude and the direction of the magnetic regulating stator current of the controllable integrated magnetic gear box, so that the rotating speed of the synchronous wind driven generator is regulated and controlled to carry out frequency modulation, the output frequency of the generator is kept at the rated frequency of 50Hz, direct grid connection is realized, a grid-connected converter is not needed, and the grid-connected electric energy quality is high.

2) Because the wind driven generator is vertically arranged in the tower, the cable is not required to be untied, the control is simpler and more convenient, and the operation is more reliable.

3) Maximum power point tracking is not needed, control is simple and convenient, operation is flexible, and service life is longer.

4) Because long and heavy blades are not needed, the transportation, installation and whole machine manufacturing cost can be greatly reduced, and the aims of light weight, miniaturization and low cost of the wind turbine generator are really achieved.

5) The wind energy capture device has the advantages that a mechanism completely different from the existing wind energy capture is adopted, the wind speed is increased through the airflow acceleration device, the wind energy capture efficiency is greatly improved, the efficiency can reach more than 90%, the Betz limit of the wind energy utilization coefficient of the traditional wind turbine is far exceeded 59.3%, the size of the wind turbine is greatly reduced, and the development bottleneck of the super-power wind turbine is eliminated.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the booster brake of the present invention.

Fig. 3 is a schematic structural diagram of the present invention, which adopts a booster brake and a yaw system.

Fig. 4 is the structure diagram of the controllable integrated coaxial magnetic gear box of the present invention.

Fig. 5 is a schematic structural view of the controllable integrated coaxial magnetic gear and its converter system of the present invention.

Fig. 6 is a schematic structural view of the controllable integrated coaxial magnetic gear box with three-level magnetic gears of the present invention.

Fig. 7 is a topological structure diagram of the wind power generation system according to the present invention.

Wherein, 1-airflow speed increaser; 2-an air guide part, 21-an air guide circular tube, 22-an air guide mechanism, 221-a guide vane, 222-a rotating shaft mechanism and 23-a nozzle; 3-working part, 31-rotating wheel, 32-main shaft, 33-main shaft bearing, 34-working circular tube; 4-an exhaust pipe; 5-yaw component, 51-tail rudder, 52-yaw bearing, 53-yaw system; 6-booster brake, 61-first pipe, 62-second pipe; 7-a tower; 8-controllable integrated coaxial magnetic gear box, 80-input shaft, 81-controllable integrated coaxial magnetic gear, 82-medium speed coaxial magnetic gear, 83-high speed coaxial magnetic gear, 84-first coupler, 85-second coupler, 86-output shaft, 87-controllable integrated coaxial magnetic gear converter, 88-first energy storage device, 811-outer rotor, 812-inner rotor, 813-magnetism regulating stator, 815-shell, 8131-armature winding and 8132-magnetism regulating core block; 9-a generator coupling; 10-synchronous wind driven generator, 101-synchronous wind driven generator three-phase alternating current stator, 102-synchronous wind driven generator rotor, 1021-synchronous wind driven generator rotor direct current excitation winding; 11-an excitation system; 111-exciting transformer, 112-rotor side converter, 113-bidirectional direct current converter, 116-second energy storage device; 12-a generator platform; 16-coupler

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model relates to a synchronous wind generating set that can directly be incorporated into power networks the operation, include: the wind power generation system comprises a wind turbine, a controllable integrated magnetic gear box 8 and a converter system thereof, a synchronous wind driven generator 10 and an excitation system 11 thereof, a tower 7 and a generator platform 12, wherein the synchronous wind driven generator 10 is arranged on the generator platform 12.

As shown in fig. 1, the wind turbine comprises: the air flow speed increaser comprises an air flow speed increaser 1, an air guide part 2, a working part 3, an exhaust pipe 4 and a yawing part 5.

The airflow speed increaser 1 is a horn-shaped pipeline, a large port of the airflow speed increaser is an air-entraining port, air is blown in from the large port, and a small port of the airflow speed increaser is fixed with the air guide part 2.

The air guide part 2 comprises an air guide circular tube 21, an air guide mechanism 22 and a nozzle 23; the air guide mechanism 22 comprises a guide vane 221 and a rotating shaft mechanism 222, wherein the rotating shaft mechanism 222 is used for adjusting the guide angle of the guide vane 221 so as to change the size of the air flow; the guide vane 221, the rotating shaft mechanism 222 and the nozzle 23 are installed in the air guide circular tube 21, and the inlet end of the air guide circular tube 21 is fixed with the small port of the airflow speed increaser 1.

The working process of the air guide mechanism 22 is as follows: when the wind speed is between the cut-in wind speed and the rated wind speed, the rotating shaft mechanism 222 adjusts the guide vane 221 to have a guide angle of zero. When the wind speed is higher than the rated wind speed, the rotating shaft mechanism 222 adjusts the guide angle of the guide vane 221 to gradually increase to a proper value, so that the captured wind power is constantly equal to the rated power value; when the wind speed exceeds the cut-out wind speed, the rotating shaft mechanism 222 is made to adjust the guide vane 221 until it is closed, blocking the flow of air into the working part 3.

The working component 3 comprises a rotating wheel 31, a main shaft 32, a main shaft bearing 33 and a working circular tube 34; the rotating wheel 31 is arranged in the middle of the working circular tube 34; the main shaft 32 is fixed with the rotating wheel 31, and the other end of the main shaft 32 is fixed with a rotating shaft of the synchronous wind driven generator 10 through a generator coupler 9; the main shaft bearing 33 is sleeved outside the main shaft 32, is arranged at the joint of the working circular tube 34 and the tower 7, and bears the gravity and the radial thrust of the rotating wheel 31; the rotating shafts of the rotating wheel 31, the main shaft 32, the main shaft bearing 33, the generator coupling 9 and the synchronous wind driven generator 10 are all kept concentric; one end of the working circular tube 34 is fixed to the air guiding circular tube 21, and the other end is fixed to the exhaust pipe 4.

The exhaust pipe 4 is an open trumpet-shaped exhaust pipeline, the small port of the exhaust pipe is fixed with the working circular pipe 34 of the working component 3, and the large port of the exhaust pipe is an exhaust port;

the yaw member 5 includes: a tail rudder 51, a yaw bearing 52; the tail rudder 51 is fixed at the rear end of the exhaust pipe 4, the yaw bearing 52 is arranged at the joint of the working circular pipe 34 and the tower 7, the outer ring of the yaw bearing is fixed with the tower 7, and the inner ring of the yaw bearing is sleeved outside the main shaft bearing 33 and is fixed with the working circular pipe 34.

As shown in fig. 2, in order to increase the air flow power and facilitate braking, the wind turbine may be additionally equipped with a booster brake 6, the booster brake 6 comprising two pipes: a first pipe 61 and a second pipe 62; one end of the first pipe 61 is fixedly arranged in front of the outer part of the exhaust pipe 4, and the other end of the first pipe is fixedly arranged in front of the outer part of the circular air guide pipe 21; one end of the second pipe 62 is fixed to the rear of the outside of the exhaust pipe 4, and the other end is fixed to the rear of the outside of the airflow speed increasing gear 1.

In normal operation, namely when the wind speed is between the cut-in wind speed and the cut-out wind speed, the booster brake 6 leads the airflow discharged from the runner 31 to the airflow speed increaser 1 through the first pipeline 61 and the second pipeline 62 to play a role of boosting; when the runner 31 needs to be braked rapidly, the rotating shaft mechanism 222 of the air guide part 2 controls the guide vane 221 to block the air flow, and the air flow flows through the second pipeline 62 of the booster brake 6 to jet the runner 31 in the opposite direction, so that the runner 31 is stopped rapidly.

As shown in fig. 3, for a larger power wind turbine, the yaw component may adopt a yaw system 53, which includes a large yaw gear ring, a side bearing, a yaw driving device, and a yaw brake; the yaw large gear ring is fixed with the tower 7 by bolts; the yaw driving device comprises a yaw motor, a speed reducer of the yaw motor and a small gear, wherein the small gear is meshed with a yaw large gear ring, and the yaw driving device is fastened on a working circular pipe 34 of the working component 3 through a bolt. When the wind direction changes, the yaw driving device drives the working circular pipe 34, so as to drive the whole wind turbine to rotate, and yaw wind alignment is realized. Yaw system 53 is the simplified version of current horizontal axis wind turbine generator system yaw system, the utility model discloses because synchronous aerogenerator 10 installs perpendicularly in pylon 7, need not to untie the cable, so need not the counter of yawing and turns round cable protection device.

As shown in fig. 4, the controllable integrated magnetic gear box 8 realizes a speed increasing function, and is composed of a controllable integrated coaxial magnetic gear 81, an input shaft 80, and an output shaft 86, where the controllable integrated coaxial magnetic gear 81 includes: an outer rotor 811, an inner rotor 812, a flux regulating stator 813, and a casing 815; as shown in fig. 5, the magnetic regulating stator 813 includes an armature winding 8131 and magnetic regulating core blocks 8132 uniformly distributed along the circumference, wherein the armature winding 8131 is a three-phase winding and is embedded between the magnetic regulating core blocks 8132; the number of pole pairs of the armature winding 8131 is equal to the number of pole pairs of the outer rotor 811.

Further, if the synchronous wind power generator 10 is a medium-speed generator, the controllable integrated magnetic gear box 8 may be added with a first-stage coaxial magnetic gear, i.e., a medium-speed magnetic gear 82, after the controllable integrated coaxial magnetic gear 81; if the synchronous wind power generator 10 is a high-speed generator, the controllable integrated magnetic gear box 8 may be added with two stages of coaxial magnetic gears, i.e. a middle-speed stage magnetic gear 82 and a high-speed stage magnetic gear 83, after the controllable integrated coaxial magnetic gear 81 to achieve a high speed-increasing ratio, as shown in fig. 6, the controllable integrated coaxial magnetic gear 81 is connected with the high-speed stage magnetic gear 83 through a first coupler 84, and the middle-speed stage magnetic gear 82 is connected with the high-speed stage magnetic gear 83 through a second coupler 85.

As shown in fig. 1-3, the controllable integrated magnetic gearbox 8 has its input shaft 80 connected to the main shaft 32 of the wind turbine via the coupling 16 and its output shaft 86 fixed to the shaft of the synchronous wind turbine 10 via the generator coupling 9.

As shown in fig. 5 and 7, the controllable integrated magnetic gearbox converter system includes: a controllable integrated coaxial magnetic gear converter 87 and a first energy storage device 88; the controllable integrated coaxial Magnetic Gear Converter (MGC) 87 is a bidirectional AC/DC three-phase converter, the DC side of which is connected to a first energy storage device 88 and the AC side of which is connected to the armature winding 8131.

As shown in fig. 4, 5 and 7, the controllable integrated magnetic gearbox 8 realizes speed regulation through a converter system thereof, that is, the converter system regulates and controls the rotating speed of the synchronous wind driven generator 10 to regulate and frequency regulate, so that the output frequency of the generator 10 is kept at a rated frequency of 50Hz, and direct grid connection is realized. The working process is as follows: when the wind speed is between the cut-in wind speed and the rated wind speed, the first energy storage device 88 works in a discharging state, a power supply is provided for the controllable integrated coaxial magnetic gear converter 87, the converter 87 works in an inversion state, at the moment, the outer rotor 811 and the magnetic regulating stator 813 form a motor, a positive electromagnetic torque (positive torque) is provided, the low-speed magnetic gear 81 is in an acceleration state, and the rotating speed of the synchronous wind driven generator 10 is controlled to be kept at the rated rotating speed. When the wind speed is higher than the rated wind speed, the rotation speed of the synchronous wind power generator 10 is increased, so that the converter 87 works in a rectification state, and at the moment, the outer rotor 811 and the magnetic regulating stator 813 form a generator to provide reverse electromagnetic torque (resistance torque) to charge the first energy storage device 88, thereby controlling the rotation speed of the synchronous wind power generator 10 to be kept at the rated rotation speed.

As shown in fig. 7, the synchronous wind turbine 10 and its excitation system 11 include: a synchronous wind driven generator 10 and an excitation system 11; the synchronous wind power generator 10 comprises a three-phase alternating current stator 101 and a rotor 102 with a direct current excitation winding, wherein the three-phase alternating current stator 101 is connected with a power grid through a step-up transformer and is directly connected with the power grid; the direct current excitation winding 1021 is powered by the excitation system 11; the excitation system 11 includes an excitation transformer 111, a rotor-side converter 112, a bidirectional dc converter 113, and a second energy storage device 116. The rotor-side converter 112 is a three-phase rectifier, and is configured to regulate and control an excitation current (i.e., a current of a dc excitation winding) of the synchronous wind turbine 10, so as to control a stator voltage of the synchronous wind turbine 10 to have the same amplitude and the same phase as a grid voltage. The high-voltage side of the excitation transformer 111 is connected to the stator 101 of the synchronous wind turbine 10, and the low-voltage side thereof is connected to the ac side of the rotor-side converter 112; the direct current side of the rotor-side converter 112 is connected with a direct current excitation winding 1021 of the synchronous wind driven generator rotor 102; one end of the bidirectional dc converter 113 is connected to the rotor dc excitation winding 1021 of the synchronous wind turbine 10, and the other end is connected to the second energy storage device 116. When the machine set is excited, the second energy storage device 116 boosts the voltage through the bidirectional direct current converter 113 to provide excitation current for the rotor direct current excitation winding 1021 of the synchronous wind driven generator 10; when the unit normally works, the exciting transformer 111 supplies power to the rotor-side converter 112, and the rotor-side converter 112 supplies exciting current to the rotor direct-current exciting winding 1021 of the synchronous wind driven generator 10; during the constant power output period of the unit, the excess power charges the second energy storage device 116 through the exciting transformer 111, the rotor-side converter 112 and the bidirectional dc converter 113, and stores energy.

Therefore, the utility model discloses a no blade wind turbine, the integrated magnetic gear case of controllable type, synchronous aerogenerator, wind energy capture efficiency is high, need not long and heavy blade, need not the lubricated cooling system of bulky oiling, need not to carry out maximum power point and trail, need not to untie the cable, need not the converter that is incorporated into the power networks, can reduce the complete machine volume greatly, reduce weight, thereby greatly reduced transportation, installation, operation maintenance and complete machine manufacturing cost, aerogenerator can directly be incorporated into the power networks simultaneously, really realize large-scale aerogenerator lightweight, it is miniaturized, low cost, high efficiency, the target of high electric energy quality, the development bottleneck of super high power wind turbine has been eliminated.

Claims (3)

1. A synchronous wind generating set capable of being directly operated in a grid-connected mode is characterized in that: the method comprises the following steps: the wind turbine, the controllable integrated magnetic gear box and a converter system thereof, the synchronous wind driven generator and an excitation system thereof and the tower frame;

the wind turbine comprises: the device comprises an airflow speed increaser, an air guide part, a working part, an exhaust pipe and a yawing part;

the air flow speed increaser is a horn-shaped pipeline, a large port of the air flow speed increaser is an air entraining port, air is blown in from the large port, and a small port of the air flow speed increaser is fixed with the air guide part;

the air guide part comprises an air guide circular tube, an air guide mechanism and a nozzle; the air guide mechanism comprises a guide vane and a rotating shaft mechanism, and the rotating shaft mechanism is used for adjusting the guide angle of the guide vane so as to change the size of the air flow; the guide vane, the rotating shaft mechanism and the nozzle are arranged in the air guide circular tube, and the inlet end of the air guide circular tube is fixed with the small port of the airflow speed increaser;

the working part comprises a rotating wheel, a main shaft bearing and a working circular pipe; the rotating wheel is arranged in the middle of the working circular tube; the main shaft is fixed with the rotating wheel, and the other end of the main shaft is fixed with a rotating shaft of the synchronous wind driven generator through a generator coupler; the main shaft bearing is sleeved on the outer side of the main shaft and is arranged at the joint of the working circular tube and the tower; the rotating wheel, the main shaft bearing, the generator coupler and the synchronous wind driven generator rotating shaft are all kept concentric; one end of the working circular tube is fixed with the air guide circular tube, and the other end of the working circular tube is fixed with the exhaust pipe;

the exhaust pipe is an open horn-shaped exhaust pipeline, a small port of the exhaust pipe is fixed with the working circular pipe of the working component, and a large port of the exhaust pipe is an exhaust port;

the yaw assembly includes: a tail vane and a yaw bearing; the tail vane is fixedly arranged at the rear end of the exhaust pipe, the yaw bearing is arranged at the joint of the working circular pipe and the tower, the outer ring of the yaw bearing is fixed with the tower, and the inner ring of the yaw bearing is sleeved outside the main shaft bearing and is fixed with the working circular pipe;

the integrated magnetism gear box of controllable type includes: the controllable integrated coaxial magnetic gear, the input shaft and the output shaft; the controllable integrated coaxial magnetic gear comprises: an outer rotor, an inner rotor and a magnetic regulating stator; the magnetic regulating stator comprises an armature winding and magnetic regulating core blocks which are uniformly distributed along the circumference, and the armature winding is a three-phase winding and is embedded between the magnetic regulating core blocks; the number of pole pairs of the armature winding is equal to that of the magnetic poles of the outer rotor;

the input shaft of the controllable integrated magnetic gear box is connected with the main shaft of the wind turbine through a coupler; an output shaft of the controllable integrated magnetic gear box is fixed with a rotating shaft of the synchronous wind driven generator through a generator coupler;

the integrated magnetic gear case converter system of controllable type includes: the controllable integrated coaxial magnetic gear converter and the first energy storage device are arranged on the same side of the magnetic gear converter; the controllable integrated coaxial magnetic gear converter is a bidirectional three-phase converter, the direct current side of the controllable integrated coaxial magnetic gear converter is connected with the first energy storage equipment, and the alternating current side of the controllable integrated coaxial magnetic gear converter is connected with an armature winding of the magnetism regulating stator;

the controllable integrated magnetic gearbox realizes speed regulation through the controllable integrated magnetic gearbox converter system, namely the controllable integrated magnetic gearbox converter system regulates and controls the rotating speed of the synchronous wind driven generator to carry out frequency regulation, so that the output frequency of the synchronous wind driven generator is kept at the rated frequency of a power grid;

the synchronous wind power generator and the excitation system thereof comprise: a synchronous wind driven generator and an excitation system; the synchronous wind driven generator comprises a three-phase alternating current stator and a rotor with a direct current excitation winding, wherein the three-phase alternating current stator is connected with a power grid through a step-up transformer; the direct current excitation winding is powered by the excitation system; the excitation system comprises an excitation transformer, a rotor side converter, a bidirectional direct current converter and second energy storage equipment; the rotor side converter is a three-phase rectifier and is used for regulating and controlling the exciting current of the synchronous wind driven generator so as to control the stator voltage of the synchronous wind driven generator to have the same amplitude and the same phase with the grid voltage and realize direct grid connection; the high-voltage side of the excitation transformer is connected with the stator of the synchronous wind driven generator, and the low-voltage side of the excitation transformer is connected with the alternating current side of the rotor-side converter; the direct current side of the rotor side converter is connected with a direct current excitation winding of the rotor of the synchronous wind driven generator; and one end of the bidirectional direct current converter is connected with the rotor direct current excitation winding of the synchronous wind driven generator, and the other end of the bidirectional direct current converter is connected with the second energy storage device.

2. The synchronous wind generating set capable of being directly connected to the grid for operation according to claim 1, wherein: in order to increase the power of the air flow and facilitate braking, the wind turbine may be equipped with a booster brake comprising two ducts: a first conduit and a second conduit; one end of the first pipeline is fixedly arranged in front of the outer part of the exhaust pipe, and the other end of the first pipeline is fixedly arranged in front of the outer part of the circular air guide pipe; one end of the second pipeline is fixedly arranged behind the outer part of the exhaust pipe, and the other end of the second pipeline is fixedly arranged behind the outer part of the airflow speed increaser.

3. The synchronous wind generating set capable of being directly connected to the grid for operation according to claim 2, wherein: for a wind turbine with higher power, a yaw system can be adopted as a yaw component of the wind turbine, and the yaw system comprises a yaw large gear ring, a side bearing, a yaw driving device and a yaw brake; the yaw large gear ring is fixed with the tower through bolts; the yaw driving device comprises a yaw motor, a speed reducer of the yaw motor and a pinion, the pinion is meshed with a yaw large gear ring, and the yaw driving device is fastened on a working circular pipe of the working component through a bolt.

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