CN100492869C - Double-rotor wind power generation excitation control method and its control system - Google Patents

Abstract

This invention relates to one double rotor wind power generator excitation control method and its control system, wherein, the wind machine is set with relative stator by Nero speed; the side wind wheel drives permanent rotor by New speed to reverse direction of main wind wheel; the side drive axis is set with permanent outer rotor with Per electrode by Nora speed; the control system is integrated with main wind wheel tip control, power control, frequency control to form motor stator voltage frequency as 50Hz rotation speed.

Description

Dual-rotor wind power generation excitation control method and control system thereof

Technical field

The present invention relates to wind-driven generator, particularly the variable speed constant frequency excitation control method and the variable speed constant frequency excitation control system thereof of double-rotor machine wind turbine generator.

Background technology

Known techniques such as Chinese patent CN200510022771.1 disclose a kind of speed-changing constant frequency method of wind power generation, be characterized in, at first the rotating speed with the wind energy conversion system rotor passes through the step-up gear speedup, the power shaft of the input power input differential permanent-magnet motor that then speed change is produced, carry out power dividing or interflow by the box of tricks of differential permanent-magnet motor and produce the stator winding that power circuit enters differential permanent-magnet motor and electrical network is realized the constant-speed and constant-frequency generating, to improve the generating efficiency of electricity generation system through feeder line.

And for example Chinese patent CN200410003089.3 discloses a kind of MW level and has directly driven the permanent-magnetic outer rotor synchro wind generator, and it adopts multipole outer-rotor structure.This generator comprises fixed axis, rotation axis, coil windings, permanent magnetic steel, iron core, stator and external rotor, wherein rotation axis by Bearing Installation on fixed axis, stator is installed on the fixed axis by stator support, external rotor is installed on the rotation axis by rotor field spider, can be provided with axial cooling ventilation duct between winding coil and stator support; Windward side between external rotor and stator is provided with protective cover.Because number of poles is many, its rotating speed is very low, thereby does not need step-up gear supporting, can directly drive generating; Generator does not have the cooling fan of carrying or adorns cooling system outward.

Known wind turbine generator is produced wind wheel by gear box under the wind-force effect transmission of power is given generator and is made it obtain corresponding rotating speeds; Usually the rotating speed of wind wheel is very low, does not far reach the high-speed engine desired rotating speed that generates electricity, and must be used for realization by the speedup of gear box gear pair; And the work condition environment of wind-driven generator unit is generally very poor, and the gear box fault that takes place frequently is a common occurrence.

The product reliability that known technology is made is poor, the maintenance cost height, and unit efficiency is low.Industry wishes to utilize the variable speed constant frequency range of operation of the brushless structure and the broad of brushless double-fed machine technology, efficiently utilize the technical advantage of wind energy in conjunction with the two phoenix wheels that are installed on the birotor power transmission shaft reverse rotation mutually, remove gear box and complicated control system and realize that the variable speed constant frequency of generating set moves.

Summary of the invention

Problem to be solved by this invention is, overcomes the above-mentioned defective that the technology of taking over exists, and a kind of dual-rotor wind power generation excitation control method and control system thereof are provided.

One of the object of the invention provides a kind of dual-rotor wind power generation excitation control method;

Two of this case purpose provides a kind of dual-rotor wind power generation exciter control system.

The present invention solves dual-rotor wind power generation excitation control method technical problem and takes following technical scheme to realize, according to a kind of dual-rotor wind power generation excitation control method provided by the invention, wherein,

1) be configured in the stator that has the Pg number of pole-pairs under the wind-force effect relatively main air wheel on the wind-powered electricity generation machine, and the main air wheel speed satisfies following relational expression with the rotation of Nzr speed:

$\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents the stator winding number of pole-pairs; Pe represents the number of pole-pairs of permanent-magnetic outer rotor; Fg represents stator frequency; Fe represents the permanent-magnetic outer rotor reduced frequency;

2). the secondary wind wheel of wind-powered electricity generation machine drives permanent-magnetic outer rotor with the reverse rotation of the relative main air wheel of Ne speed, and the permanent-magnetic outer rotor reduced frequency satisfies following relational expression: $\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$

Wherein: Ne vice wind wheel relative stator rotating speed.

3). be configured to the relative main air wheel of Nzre rotating speed permanent-magnetic outer rotor reverse rotation, that have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor satisfies following relational expression: Nzre=Nzr+Ne

Wherein: Nzre represents the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor;

4) when the main air wheel is lower than rated speed, the unit centralized control equipment carries out main air vane tip Transmission Ratio Control: the wind speed that the port that connects via the wind speed checkout gear records and be transferred to the unit centralized control equipment by the main air wheel speed that rotation-speed measuring device records, warp is right with the main air vane tip speed ratio numeric ratio that the unit centralized control equipment is preset, calculate the adjusting numerical value of propeller pitch angle, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism collection again, main air wheel variable propeller pitch adjusting mechanism is sent the instruction of change oar by the unit centralized control equipment; By the unit centralized control equipment according to $\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$ Relational expression is to major and minor wind wheel speed Control;

5) when the main air wheel reaches rated speed, the unit centralized control equipment carries out power control to generator, the output voltage of the output current of the generator that records via detecting device for output current and the generator that records via the output voltage measurement mechanism is transferred to the unit centralized control equipment, and the output of a generator value that calculates via this unit centralized control equipment is right with default rated power numeric ratio; When meeting preset value, wind speed that the port that is connect by the wind speed checkout gear that the unit centralized control equipment will collect records and the main air wheel rated speed that records by rotation-speed measuring device, calculate the adjusting numerical value of the propeller pitch angle of main air wheel rated speed under this wind speed, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism collection again, main air wheel variable propeller pitch adjusting mechanism is sent the instruction of change oar by the unit centralized control equipment;

6) when main air wheel to be lower than or when meeting the rated speed operation, the unit centralized control equipment carries out FREQUENCY CONTROL by secondary wind wheel to generator: the unit centralized control equipment is gathered mains frequency checkout gear frequency numerical value and master, secondary wind wheel is set the generator output voltage frequency numerical value comparison that calculates under the rotating speed, calculate the adjusting numerical value of secondary wind wheel propeller pitch angle under this wind speed, compare with the propeller pitch angle value of secondary wind wheel propeller pitch angle measurement mechanism collection again, by the unit centralized control equipment secondary wind wheel variable propeller pitch adjusting mechanism is sent the instruction of change oar, make secondary wind wheel by the reverse rotation of the relative main air wheel of the default rule of unit centralized control equipment, and formation make the generator unit stator electric voltage frequency be always the variation rotating speed of 50Hz;

7) when the main air wheel speed reaches 1.2-1.5 times of rated speed, when secondary wind speed round reached minimum speed 0 speed simultaneously, brake started.

This case solves dual-rotor wind power generation excitation control method technical problem and also can be applied to the following technical measures to achieve further:

Aforesaid dual-rotor wind power generation excitation control method, wherein, described exciter internal rotor winding number of pole-pairs is set to Pe to the utmost point; Described generator amature winding number of pole-pairs is set to Pg to the utmost point; Described exciter internal rotor winding is connected by connecting line negative-phase sequence between rotor with the generator amature winding; When generator reached rated output power, power of the assembling unit factor was controlled at operation about cos θ=1; When generator speed was lower than specified minimum speed or output of a generator and is higher than peak power output, off-the-line generator from the electrical network was finished soft off-the-line by the grid-connection control device configuration.

Aforesaid dual-rotor wind power generation excitation control method, wherein, described stator winding number of pole-pairs is 3 times a permanent-magnetic outer rotor number of pole-pairs, is assemblied in main air wheel and the secondary wind wheel that is assemblied in counter drive shaft on the final drive shaft and regulates by the relative opposite direction at blade pitch angle and be relative reverse rotation and dispose.

The technical problem that this case solves the dual-rotor wind power generation exciter control system can adopt following technical measures to realize, according to a kind of dual-rotor wind power generation exciter control system provided by the invention, comprise the wind-powered electricity generation machine, wherein, in the described wind-powered electricity generation machine, generator unit stator and the generator amature that is rotary configured setting by final drive shaft transmission, relative this stator, exciter is by the final drive shaft and the coaxial string dress of generator main body of device main air wheel; Permanent magnet is located at the permanent-magnetic outer rotor that constitutes exciter on the yoke of permanent-magnetic outer rotor; This permanent-magnetic outer rotor is to be the structure setting that counterrotating structure and this permanent-magnetic outer rotor are relative generator unit stator rotation with the exciter internal rotor; Secondary wind wheel be can drive permanent-magnetic outer rotor constructing apparatus on counter drive shaft; Become the coaxial connection of the mode that to rotate mutually by the counter drive shaft of secondary wind wheel transmission with the final drive shaft of taking turns transmission by main air;

Be provided with on the major and minor wind wheel and the signal of rotating speed can be sent to the main air wheel speed measurement mechanism of unit centralized control equipment, secondary wind speed round measurement mechanism;

The port that the unit centralized control equipment has the port that connects with the wind speed checkout gear, connect with the wind direction checkout gear, with the port of host computer transmission data;

Yawer and unit centralized control equipment connect in the mode of wind direction under the control main air wheel to the wind rotation; Described main air is taken turns main air wheel variable propeller pitch adjusting mechanism, the secondary wind wheel variable propeller pitch adjusting mechanism with secondary wind wheel difference configuration adjustment propeller pitch angle, and described major and minor wind wheel variable propeller pitch adjusting mechanism and unit centralized control equipment all connect in the mode of control wind wheel variable propeller pitch adjusting mechanism change oar;

Connect successively at the voltage output end of generator can be limited generator output voltage, with after date softly be incorporated into the power networks, the grid-connection control device and the step-up transformer of soft parallel off when shutting down, connect with external power grid again; Between grid-connection control device and step-up transformer successively the output voltage measurement mechanism that connects of configuration and unit centralized control equipment, the detecting device for output current that connects with the unit centralized control equipment, and with the mains frequency checkout gear of unit centralized control equipment connection; The unloaded checkout gear that configuration and unit centralized control equipment connect between generator and grid-connection control device.

This case solves dual-rotor wind power generation exciter control system technical problem and also can be applied to the following technical measures to achieve further:

Aforesaid dual-rotor wind power generation exciter control system, wherein: the secondary wind wheel of described wind-powered electricity generation machine is with the drive structure configuration of relative main air wheel reverse rotation; Wind direction was to the setting of wind rotational structure under the main air wheel was; The blade wind sweeping area of described main air wheel is set to blade wind sweeping area 2-5 times of secondary wind wheel.

Aforesaid dual-rotor wind power generation exciter control system, wherein: described major and minor wind wheel variable propeller pitch adjusting mechanism structure is identical, it is made up of change oar servomechanism and change oar control device, and described unit centralized control equipment connects with the mode that change oar servomechanism is according to detected propeller pitch angle variation carrying out main air is taken turns and secondary wind speed round is regulated by becoming the oar control device; Dispose secondary wind wheel propeller pitch angle measurement mechanism, main air wheel propeller pitch angle measurement mechanism in described main air wheel and the secondary wind wheel respectively.

Aforesaid dual-rotor wind power generation exciter control system, wherein: the permanent magnet of described wind-powered electricity generation machine becomes configuration set, its number of pole-pairs and exciter internal rotor number of pole-pairs coupling; The yoke of described device permanent magnet is arranged in the permanent-magnetic outer rotor housing; Major and minor wind wheel variable propeller pitch adjusting mechanism is by driven by servomotor; This change oar servomechanism and unit centralized control equipment are and can carry out the electric connection of mode of rotational speed regulation to main air wheel and secondary wind wheel according to the variation of propeller pitch angle.

Aforesaid dual-rotor wind power generation exciter control system, wherein: the main air impeller blade wind sweeping area of described wind-powered electricity generation machine is 3 times of blade wind sweeping area of secondary wind wheel approximately, described wind sweeping area is the area that the wind wheel rotation forms; Described main air wheel wind direction down rotates wind, and secondary wind wheel upwind is oppositely rotated wind; Leave the default spacing of avoiding secondary wind wheel and tower collision between described secondary wind wheel and the exciter; Brake and unit centralized control equipment connect with the electric means that can start work when secondary wind speed round is 0.

Aforesaid dual-rotor wind power generation exciter control system, wherein: described stator winding number of pole-pairs Pg is set to greater than permanent-magnetic outer rotor number of pole-pairs Pe, the described main air wheel that is configured on the final drive shaft, the stator that has the Pg number of pole-pairs under the wind-force effect relatively is with the rotation of Nzr speed, and the main air wheel speed satisfies following relational expression configuration:

$\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents the stator winding number of pole-pairs; Pe represents the number of pole-pairs of permanent-magnetic outer rotor; Fg represents stator frequency; Fe represents the permanent-magnetic outer rotor reduced frequency;

Described stator winding number of pole-pairs is 3 times a permanent-magnetic outer rotor number of pole-pairs; Described exciter internal rotor winding number of pole-pairs is set to Pe to the utmost point; Described generator amature winding number of pole-pairs is set to Pg to the utmost point; Described exciter internal rotor winding is connected by connecting line negative-phase sequence between rotor with the generator amature winding; The wind-powered electricity generation machine secondary wind wheel be configured on the counter drive shaft, this pair wind wheel drives permanent-magnetic outer rotor with the rotation of Ne speed, and the permanent-magnetic outer rotor reduced frequency satisfies following relational expression:

$\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$ Wherein: Ne vice wind wheel relative stator rotating speed;

Be configured to the relative main air wheel of Nzre rotating speed permanent-magnetic outer rotor reverse rotation, that have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor satisfies following relational expression:

Nzre＝Nzr+Ne

Wherein: Nzre represents the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor; Described major and minor power transmission shaft all has the hollow via-hole of preset diameters, and this power transmission shaft is by being configured in bearing on the generator and the bearings on the exciter.

Aforesaid dual-rotor wind power generation exciter control system, wherein, the secondary wind wheel of described wind-powered electricity generation machine is with the drive structure configuration of relative main air wheel reverse rotation; Described secondary wind wheel is upwind to the setting of wind rotational structure; Wind direction was to the setting of wind rotational structure under the main air wheel was; Described permanent magnet becomes configuration set, its number of pole-pairs and exciter internal rotor number of pole-pairs coupling; The yoke of described device permanent magnet is arranged in the permanent-magnetic outer rotor housing.

Aforesaid dual-rotor wind power generation exciter control system wherein, leaves the default spacing of avoiding secondary wind wheel and tower collision between described secondary wind wheel and the exciter.

The present invention compared with prior art has significant advantage and beneficial effect.By above technical scheme as can be known, the present invention has following advantage at least under the structural arrangements of excellence:

The present invention need not the convertor assembly of allocating power complexity, effective simplification the machine set constructor, improved unit operation efficient and reliability, reduced the control system cost;

Though the two wind wheel structures of reasonable disposition of the two wind wheels of the present invention slightly increase equipment manufacturing cost, but bigger wind wheel is set is used for generating, less wind wheel is regulated excitation frequency and is held concurrently and generate electricity, and has effectively improved wind energy utilization, and more conventional single wind wheel wind-powered electricity generation unit wind energy utilization improves 10%-15%;

Brushless double-fed machine rotor and rotary permanent-magnet external rotor dual-rotor structure are adopted in this case, realize the operation of unit variable speed constant frequency excitation, quite reduce 1/3 at least, thereby shorten the generator diameter, be convenient to the equipment transportation, reduce unit weight with capacity single rotor power generator electrode logarithm; The configuration of two wind wheel structure settings of this case and Yawing mechanism makes the simpler, reliable of set yaw control change;

This case unit can be realized variable speed constant frequency operation, variable pitch adjusting, the two more single wind wheel variable speed constant frequency of the wind wheel generation unit unit wind energy utilizations of the following this case of rated wind speed improve a lot, non-gear box, can realize directly driving, the worry of no slip ring fault, do not need big capacity convertor assembly, unit reliability improves greatly; The present invention contrasts prior art significant contribution and progress, is really to have novelty, creativeness, practical good technology.

The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.

Description of drawings

Fig. 1 is an apoplexy electric machine structure schematic diagram of the present invention;

Fig. 2 is an excitation winding wiring construction schematic diagram of the present invention;

Fig. 3 is a variable speed constant frequency excitation control system structural representation of the present invention;

Fig. 4 is a variable speed constant frequency excitation control system operation principle block diagram of the present invention.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, structure, feature and effect thereof, describe in detail as after.

Shown in Fig. 1-4, a kind of variable speed constant frequency excitation control system comprises wind-powered electricity generation machine M, these wind-powered electricity generation facility have the generator main body 1 that is packed on the base 10, and generator unit stator 16 is installed in the motor casing 111, and generator amature 14 is the structure setting of relative stator 16 rotations by final drive shaft 13, wherein

Exciter 4 is contained in the casing by final drive shaft and the coaxial string of generator main body; Permanent magnet 43 is installed on the yoke 42 in the permanent-magnetic outer rotor housing 410, constitutes the permanent-magnetic outer rotor 41 of exciter, this permanent-magnetic outer rotor by connector 46 to be counterrotating structure setting with exciter internal rotor 45; Described permanent magnet 43 becomes configuration set, its number of pole-pairs and exciter internal rotor number of pole-pairs coupling by known techniques; Permanent-magnetic outer rotor is relative exciter internal rotor rotation, the also structure setting of generator unit stator rotation relatively; Counter drive shaft 12 and final drive shaft 13 coaxial connections; Described major and minor power transmission shaft all has the hollow via-hole 130 of preset diameters, so that the Generator Set power transmission shaft is satisfying under the specification requirement condition more lightweight, thereby the reduction body weight, this power transmission shaft supports by the bearing 115,116 and the bearing on the exciter 147,148 that are configured on the generator;

Thus, generator amature and form the tandem rotor structure of generator with the exciter internal rotor of this rotor coaxial transmission rotation, and be birotor structure with permanent-magnetic outer rotor, thereby can realize the operation of unit variable speed constant frequency, quite reduce 1/3 at least with capacity single rotor power generator electrode logarithm, thereby can shorten the generator diameter, further reduce motor weight;

By known techniques, will by the counter drive shaft 12 of secondary wind wheel transmission with by 13 one-tenths coaxial installations of the bind mode that can rotate mutually of final drive shaft of main air wheel transmission, by counter drive shaft with the transmission of power of secondary wind wheel to permanent-magnetic outer rotor;

The drive structure device of secondary wind wheel 2 relative main air wheel reverse rotations is at the axle body end of counter drive shaft 12, this pair wind wheel is upwind with known techniques by the F2 direction by its wheel hub 21 wind is installed, leave the default spacing L that avoids secondary wind wheel and tower collision between secondary wind wheel and the exciter, can determine the reservation spacing that secondary wind wheel and pylon do not collide by the number of degrees at the main air wheel elevation angle; Main air wheel 3 is assemblied in final drive shaft 13 axle body ends, and wind direction was to the setting of wind rotational structure under this main air wheel was by the F3 direction with known techniques by its wheel hub 31.

The main air wheel 3 of aforementioned wind-powered electricity generation machine is configured on the final drive shaft, and the stator 16 that has the Pg number of pole-pairs under the wind-force effect relatively is with the rotation of Nzr speed, and the main air wheel speed satisfies following relational expression:

$\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents the stator winding number of pole-pairs; Pe represents the number of pole-pairs of permanent-magnetic outer rotor 41; Fg represents stator frequency; Fe represents the permanent-magnetic outer rotor reduced frequency;

Described exciter internal rotor 45 winding numbers of pole-pairs are set to Pe to the utmost point; Described generator amature 14 winding numbers of pole-pairs are set to Pg to the utmost point; Described exciter internal rotor winding is connected by 123 negative-phase sequences of connecting line between rotor with the generator amature winding;

Described stator winding number of pole-pairs Pg is set to greater than permanent-magnetic outer rotor number of pole-pairs Pe, and described stator winding number of pole-pairs can be 3 times a permanent-magnetic outer rotor number of pole-pairs; The wind-powered electricity generation machine secondary wind wheel 2 be configured on the counter drive shaft, this pair wind wheel drives permanent-magnetic outer rotor with the reverse rotation of the relative main air wheel of Ne speed, and the permanent-magnetic outer rotor reduced frequency satisfies following relational expression:

$\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$

Wherein: Ne vice wind wheel relative stator rotating speed

Be configured to the permanent-magnetic outer rotor that the Nzre rotating speed is counterrotating, have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor satisfies following relational expression:

Nzre＝Nzr+Ne

Wherein: Nzre represents the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor;

Be provided with on the aforesaid major and minor wind wheel and the signal of rotating speed can be sent to the main air wheel speed measurement mechanism G of unit centralized control equipment 5, secondary wind speed round measurement mechanism G1, the wind speed that the port D1 that connects via the wind speed checkout gear records and by the wind speed round that rotation-speed measuring device records is transferred to unit centralized control equipment 5; Unit centralized control equipment and yawer 6 connect, and control main air wheel wind direction down rotates wind, and yawer 6 can be installed on the engine room inside 101 under the base;

Described main air wheel is taken turns variable propeller pitch adjusting mechanism 38, secondary wind wheel variable propeller pitch adjusting mechanism 28 with the main air of the hub portion difference configuration adjustment propeller pitch angle of secondary wind wheel, this main air wheel, secondary wind wheel variable propeller pitch adjusting mechanism and the 5 electric connections of unit centralized control equipment are sent the instruction of change oar by 5 pairs of main air wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Dispose secondary wind wheel propeller pitch angle measurement mechanism G28, main air wheel propeller pitch angle measurement mechanism G38 in described main air wheel and the secondary wind wheel respectively;

Described major and minor wind wheel variable propeller pitch adjusting mechanism structure is identical, it is made up of change oar servomechanism 381,281 that drives with servomotor M38, M28 and change oar control device 382,282, and the integrated control 5 of described unit is by becoming oar control device 382,282 and connecting with the change oar servomechanism 381,281 that servomotor M38, M28 drive; This change oar servomechanism changes the rotational speed regulation of carrying out main air wheel and secondary wind wheel according to detected propeller pitch angle under the control of unit centralized control equipment 5, realize that wind direction rotates wind under the main air wheel, and secondary wind wheel upwind is to the wind reverse rotation; Brake 15 is arranged between generator ' s cover and the secondary wind wheel wheel hub; Voltage output end at generator connects grid-connection control device 7 and step-up transformer 8 successively, connects with external power grid W again; Between grid-connection control device and step-up transformer successively the output voltage measurement mechanism G4 that connects of configuration and unit centralized control equipment 5, the detecting device for output current G3 that connects with the unit centralized control equipment, and with the mains frequency checkout gear G2 of unit centralized control equipment connection; The unloaded checkout gear G5 that configuration and unit centralized control equipment connect between generator M and grid-connection control device; The unit centralized control equipment also have the port D1 that connects with wind speed checkout gear (not shown), with wind direction checkout gear (not shown) connect port D2, with the port D3 of host computer transmission data; Described major and minor wind wheel blade is pressed known technology mode device on the wind wheel wheel hub, described main air impeller blade wind sweeping area is greater than blade wind sweeping area 2-5 times of secondary wind wheel, especially be that 3 times of left and right sides of blade wind sweeping area of secondary wind wheel are preferable with main air impeller blade wind sweeping area, described wind sweeping area is the area that the wind wheel rotation forms;

The output voltage of the output current of the generator that records via detecting device for output current G3 and the generator that records via output voltage measurement mechanism G4 is transferred to unit centralized control equipment 5, and the output of a generator value that calculates via unit centralized control equipment 5 is right with default rated power numeric ratio; Imposing a condition down, wind speed that unit centralized control equipment 5 will be recorded by the connection port D1 of wind speed checkout gear and the main air wheel rated speed that records by rotation-speed measuring device G, collection calculates the adjusting numerical value of the propeller pitch angle of main air wheel rated speed under this wind speed, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves, and prevents the generator overload under firm power;

In the time of between rated speed that permanent-magnet variable-speed constant frequency excitation double-rotor pneumatic electric machine is incorporated into the power networks, the main air wheel speed is being preset when connecting and the minimum speed, secondary wind wheel is taken turns reverse rotation, is made the generator unit stator electric voltage frequency be always 50Hz by this rotation speed change by pre-conditioned relative main air under unit centralized control equipment 5 is regulated; Secondary wind speed round is minimum to zero, brake 15 work when secondary wind speed round is 0 speed,

To sum up, the wind-powered electricity generation machine of two wind wheel organizations, wherein larger-diameter main air wheel is used for generating, secondary wind wheel than minor diameter is used for regulating the double generating of excitation frequency, the two on same axis, mutually opposite spin, yawer be responsible for controlling the main air wheel down wind direction wind is rotated main force's generating; Secondary wind wheel upwind is to the wind reverse rotation, and auxiliary power generation improves usefulness greatly.

Configurations such as the voltage output end grid-connection control device of described generator can be limited generator output voltage, with after date softly be incorporated into the power networks, soft parallel off when shutting down, can effectively reduce the impact of the reactive current that is incorporated into the power networks, guarantee unit safety operation; When generator reached rated output power, power of the assembling unit factor was controlled at operation about cos θ=1; When the generator active power of output hour, the lagging reactive power of unit output cos θ＜1; When generator speed was lower than specified minimum speed or output of a generator and is higher than peak power output, off-the-line generator from the electrical network was finished soft off-the-line by configurations such as grid-connection control devices.

The variable speed constant frequency excitation control method:

1. be configured in the stator 16 that has the Pg number of pole-pairs under the wind-force effect relatively main air wheel 3 on the final drive shaft 13, and the main air wheel speed satisfies following relational expression with the rotation of Nzr speed: $\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$

Wherein: Nzr represents the main air wheel speed; Pg represents the stator winding number of pole-pairs; Pe represents the number of pole-pairs of permanent-magnetic outer rotor 41; Fg represents stator frequency; Fe represents the permanent-magnetic outer rotor reduced frequency;

2. the secondary wind wheel in the configuration of counter drive shaft 12 ends drives permanent-magnetic outer rotor with the reverse rotation of the relative main air wheel of Ne speed, and the permanent-magnetic outer rotor reduced frequency satisfies following relational expression:

$\mathrm{fe}=\frac{\mathrm{Ne}\×\mathrm{Pe}}{60}$ Wherein: Ne vice wind wheel relative stator rotating speed

3. be configured to the permanent-magnetic outer rotor that the Nzre rotating speed is counterrotating, have the Pe number of pole-pairs on counter drive shaft, the rotating speed of the relative excitation internal rotor rotation of permanent-magnetic outer rotor satisfies following relational expression:

Nzre＝Nzr+Ne

Wherein: Nzre represents the rotating speed of the relative exciter internal rotor rotation of permanent-magnetic outer rotor

4. described exciter internal rotor 45 winding numbers of pole-pairs are set to Pe to the utmost point; Described generator amature 14 winding numbers of pole-pairs are set to Pg to the utmost point; Described exciter internal rotor winding is connected by 123 negative-phase sequences of connecting line between rotor with the generator amature winding;

5. the wind speed that records of the port D1 that connects via the wind speed checkout gear and the main air wheel speed that records by rotation-speed measuring device G, be transferred to unit centralized control equipment 5, it is right that the unit centralized control equipment carries out main air vane tip speed ratio numeric ratio when the main air wheel is lower than rated speed, warp is right with the main air vane tip speed ratio numeric ratio that the unit centralized control equipment is preset, calculate the adjusting numerical value of propeller pitch angle, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves with its best tip speed ratio, reaches the purpose that makes full use of wind energy below rated speed;

When the main air wheel reaches rated speed, the output voltage of the output current of the generator that records via detecting device for output current G3 and the generator that records via output voltage measurement mechanism G4 is transferred to unit centralized control equipment 5, and the output of a generator value that calculates via this unit centralized control equipment is right with default rated power numeric ratio; When meeting preset value, wind speed that the port D1 that is connect by the wind speed checkout gear that unit centralized control equipment 5 will collect records and the main air wheel rated speed that records by rotation-speed measuring device G, calculate the adjusting numerical value of the propeller pitch angle of main air wheel rated speed under this wind speed, compare with the propeller pitch angle value of main air wheel propeller pitch angle measurement mechanism G38 collection again, send the instruction of change oar by 5 pairs of main airs wheels of unit centralized control equipment variable propeller pitch adjusting mechanism 38; Can realize that thus the main air wheel moves, and prevents the generator overload under firm power;

6. the wind speed that records of the port D1 that connects via the wind speed checkout gear and the secondary wind speed round that records by secondary wind speed round measurement mechanism G1 are transferred to unit centralized control equipment 5; When the main air wheel is lower than rated speed, the generator output voltage frequency numerical value comparison that calculates under the frequency numerical value of unit centralized control equipment 5 collection mains frequency checkout gear G2 and this rotating speed of secondary wind wheel, calculate the adjusting numerical value of propeller pitch angle under this rotating speed of secondary wind wheel, compare with the propeller pitch angle value of secondary wind wheel propeller pitch angle measurement mechanism G28 collection again, send the instruction of change oar by 5 pairs of secondary wind wheel variable propeller pitch adjusting mechanisms 28 of unit centralized control equipment; By unit centralized control equipment 5 according to $\mathrm{Nzr}=\frac{60\×(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$ Relational expression is carried out speed Control, makes the main air wheel keep the operation of generator 50Hz constant frequency below rated speed;

When the main air wheel reaches rated speed, wind speed that the port D1 that connects via the wind speed checkout gear records and the secondary rated rotation speed of rotor that records by rotation-speed measuring device G, be transferred to unit centralized control equipment 5, unit centralized control equipment 5 is gathered the generator output voltage frequency numerical value comparison that calculates under mains frequency checkout gear G2 frequency numerical value and the secondary rated rotation speed of rotor when the main air wheel reaches rated speed, calculate the adjusting numerical value of secondary wind wheel propeller pitch angle under this wind speed, compare with the propeller pitch angle value of secondary wind wheel propeller pitch angle measurement mechanism G28 collection again, send the instruction of change oar by 5 pairs of secondary wind wheel variable propeller pitch adjusting mechanisms 28 of unit centralized control equipment; Make the main air wheel when rated speed, keep the operation of generator 50Hz constant frequency; With the generator output voltage frequency serves as to regulate target, and to limit stator frequency fg be 50Hz by regulating rotating speed that secondary wind wheel propeller pitch angle controls secondary wind wheel, and the static fe of permanent-magnetic outer rotor is considered as 0;

7. stator winding number of pole-pairs Pg is set greater than permanent-magnetic outer rotor number of pole-pairs Pe, described stator winding number of pole-pairs can be 3 times a permanent-magnetic outer rotor number of pole-pairs.

Thereby, the two rotor windings of connecting during work have identical power frequency, mutual reciprocal rotating magnetic field, generator amature winding excitation field connect relatively rotor rotary speed Nzre and main air wheel shaft mechanical rotation speed Nzr stack, cooperate, all the time form synchronous excitation magnetic field, this synchronous field produces the 50Hz electromotive force in to the stator winding of the utmost point having Pg, realizes the variable speed constant frequency excitation operation of generating set.

8. being assemblied in main air wheel and the secondary wind wheel 2 that is assemblied in counter drive shaft on the power transmission shaft 13 regulates by the relative opposite direction at blade pitch angle and is relative reverse rotation and disposes.

9. when the main air wheel speed was between default rated speed and minimum speed, secondary wind wheel made the generator unit stator electric voltage frequency be always the variation rotating speed of 50Hz by default rule reverse rotation, formation under unit centralized control equipment 5 is regulated; When the main air wheel speed reached 1.2-1.5 times of rated speed, when secondary wind speed round reached minimum speed 0 speed simultaneously, brake 15 started; Both this, when the main air wheel speed reached specified minimum speed, secondary wind wheel reverse speed reached the highest, unit can be realized the variable speed constant frequency operation.

The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.

Claims (12)

1. A dual-rotor wind power generation excitation control method, characterized in that, 1) The wind generator is equipped with a main wind rotor that rotates at Nzr speed relative to the stator with Pg pole logarithm under the action of wind force, and the speed of the main wind rotor satisfies the following relationship: $\mathrm{<span\; class="notranslate">\; Nzr</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 60</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; fg</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; fe</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; Pg</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; Pe</span>}}$ Among them: Nzr indicates the speed of the main wind rotor; Pg indicates the number of pole pairs of the stator winding; Pe indicates the number of pole pairs of the permanent magnet outer rotor; fg indicates the frequency of the stator; fe indicates the converted frequency of the permanent magnet outer rotor; 2). The auxiliary wind rotor of the wind turbine drives the permanent magnet outer rotor to rotate in reverse with respect to the main wind rotor at Ne speed, and the converted frequency of the permanent magnet outer rotor satisfies the following relationship: $\mathrm{fe}=\frac{\mathrm{Ne}\&times;\mathrm{Pe}}{60}$ Among them: Ne represents the relative speed of the auxiliary wind wheel to the stator; 3). A permanent magnet outer rotor with a Pe pole logarithm is installed on the auxiliary drive shaft, which rotates in reverse with respect to the main wind wheel at the speed of Nzre. The rotational speed of the permanent magnet outer rotor relative to the inner rotor of the exciter satisfies the following relationship: Nzre=Nzr+Ne Among them: Nzre represents the rotation speed of the permanent magnet outer rotor relative to the inner rotor of the exciter; 4) When the main wind rotor is lower than the rated speed, the centralized control device of the unit controls the tip speed ratio of the main wind rotor: the wind speed measured through the port (D1) connected to the wind speed detection device and the wind speed measured by the speed measurement device (G) The rotational speed of the main wind rotor is transmitted to the centralized control device (5) of the unit, and compared with the value of the tip speed ratio of the main wind rotor preset by the centralized control device of the unit, the adjustment value of the pitch angle is calculated, and then compared with the pitch angle of the main wind rotor The pitch angle values collected by the angle measurement device (G38) are compared, and the centralized control device of the unit sends a pitch change command to the pitch adjustment mechanism (38) of the main wind rotor; $\mathrm{Nzr}=\frac{60\&times;(\mathrm{fg}-\mathrm{fe})}{\mathrm{Pg}+\mathrm{Pe}}$ Relational expression controls the variable speed of the main and auxiliary wind wheels; 5) When the main wind rotor reaches the rated speed, the unit centralized control device controls the power of the generator, the output current of the generator measured by the output current detection device (G3) and the power generation measured by the output voltage measurement device (G4) The output voltage of the generator is transmitted to the centralized control device of the unit, and the output power value of the generator calculated by the centralized control device of the unit is compared with the preset rated power value; The wind speed measured by the port (D1) connected to the wind speed detection device and the rated speed of the main wind rotor measured by the speed measuring device (G), calculate the adjustment value of the pitch angle of the rated speed of the main wind rotor at this wind speed, and then use the The pitch angle values collected by the main wind rotor pitch angle measurement device (G38) are compared, and the unit centralized control device issues a pitch change command to the main wind rotor pitch adjustment mechanism (38); 6) When the main wind rotor is running at a speed lower than or in line with the rated speed, the unit centralized control device controls the frequency of the generator through the auxiliary wind rotor: the unit centralized control device (5) collects the frequency value of the power grid frequency detection device (G2) and the main and Comparing the output voltage and frequency values of the generator calculated at the set speed of the auxiliary wind rotor, the adjustment value of the pitch angle of the auxiliary wind rotor at this wind speed is calculated, and then compared with the propeller collected by the auxiliary wind rotor pitch angle measuring device (G28). Compared with the pitch angle value, the unit centralized control device (5) sends a pitch command to the auxiliary wind rotor pitch adjustment mechanism (28), so that the auxiliary wind rotor is reversed relative to the main wind rotor according to the preset law of the unit centralized control device Rotate and form a variable speed that keeps the voltage frequency of the generator stator at 50Hz; 7) When the rotational speed of the main wind rotor reaches 1.2-1.5 times of the rated rotational speed and at the same time the rotational speed of the auxiliary wind rotor reaches the minimum speed of 0 speed, the brake (15) starts. 2. The dual-rotor wind power generation excitation control method as claimed in claim 1, wherein the number of pole pairs of the rotor windings in the exciter is set to be Pe pairs of poles; the number of pole pairs of the generator rotor windings is set to Pg pairs pole; the inner rotor winding of the exciter and the rotor winding of the generator are connected in reverse phase sequence through the connection line between the rotors; when the generator reaches the rated output power, the power factor of the unit is controlled to run around cos θ=1; when the generator speed When the rated minimum speed is lower than the rated minimum speed or the output power of the generator is higher than the maximum output power, the generator is disconnected from the grid, and the soft disconnection is completed through the configuration of the grid-connected control device. 3. The double-rotor wind power generation excitation control method as claimed in claim 1 or 2, characterized in that, the number of pole pairs of the stator winding is 3 times the number of pole pairs of the permanent magnet outer rotor, and the number of pole pairs assembled on the main transmission shaft The main wind rotor and the auxiliary wind rotor assembled on the auxiliary transmission shaft are arranged in relative counter-rotation through the relative opposite direction adjustment of the blade pitch angle. 4. A double-rotor wind power generation excitation control system, comprising a wind generator (M), is characterized in that, in the described wind generator (M), the generator stator (16) is driven by the main transmission shaft (13), relatively to the The stator (16) is a generator rotor (14) arranged in a rotating structure, and the exciter (4) is coaxially installed in series with the main drive shaft of the main wind wheel (3) of the device; the permanent magnet (43) is arranged on the permanent The permanent magnet outer rotor (41) of the exciter is formed on the yoke (42) of the magnetic outer rotor; the permanent magnet outer rotor is in a structure of relative rotation with the exciter inner rotor (45), and the permanent magnet outer rotor Structural setting for generator stator rotation; auxiliary wind wheel is configured to drive the permanent magnet outer rotor on the auxiliary transmission shaft; the auxiliary transmission shaft (12) driven by the auxiliary wind wheel and the main drive driven by the main wind wheel Shafts (13) are connected coaxially in a mutually rotatable manner; The aforementioned main and auxiliary wind wheels are provided with a main wind wheel speed measuring device (G) and an auxiliary wind wheel speed measuring device (G1), which can transmit the speed signal to the unit centralized control device (5); The unit centralized control device has a port (D1) connected with the wind speed detection device, a port (D2) connected with the wind direction detection device, and a port (D3) for data transmission with the upper computer; The yaw controller (6) is connected with the unit centralized control device to control the downwind direction of the main wind rotor to rotate against the wind; the main wind rotor and the auxiliary wind rotor are respectively equipped with the main wind rotor pitch adjustment Mechanism (38), auxiliary wind rotor pitch adjustment mechanism (28), the main and auxiliary wind rotor pitch adjustment mechanisms and unit centralized control device (5) are all used to control the wind rotor pitch adjustment mechanism to change the pitch connected in a way; The voltage output terminal of the generator is sequentially connected with a grid-connected control device (7) and a step-up transformer (8), which can limit the output voltage of the generator, softly connect to the grid after the same period, and softly split during shutdown, and the step-up transformer (8), and then connect to the external power grid connection; between the grid-connected control device and the step-up transformer, the output voltage measuring device (G4) connected with the centralized control device of the unit, the output current detection device (G3) connected with the centralized control device of the unit, and the integrated The power grid frequency detection device (G2) connected with the control device; the no-load detection device (G5) connected with the centralized control device of the unit is arranged between the generator (M) and the grid-connected control device. 5. The dual-rotor wind power generation excitation control system as claimed in claim 4, characterized in that: the secondary wind rotor (2) of the wind generator (M) is configured with a transmission structure that rotates in opposite directions relative to the main wind rotor; The wheel is arranged in a downwind direction and rotates against the wind; the sweeping area of the blades of the main wind wheel is set to be 2-5 times that of the blades of the auxiliary wind wheel. 6. The dual-rotor wind power generation excitation control system according to claim 4 or 5, characterized in that the main and auxiliary wind rotor pitch adjustment mechanisms have the same structure, and it consists of a pitch servo mechanism (381, 281) and The pitch control device (382, 282) is composed of the unit centralized control device through the pitch control device and the pitch servo mechanism (381, 281) to adjust the speed of the main wind rotor and the auxiliary wind rotor according to the detected pitch angle change. The adjustment mode is connected; the main wind rotor and the auxiliary wind rotor are respectively equipped with a pitch angle measurement device (G28) of the auxiliary wind rotor and a pitch angle measurement device (G38) of the main wind rotor. 7. The dual-rotor wind power generation excitation control system as claimed in claim 6 is characterized in that, the permanent magnets (43) of the wind generator (M) are configured in groups, and the number of pole pairs is the same as the number of pole pairs of the inner rotor of the exciter. matching; the yoke (42) of the permanent magnet (43) of the device is set in the permanent magnet outer rotor housing (410); the main and auxiliary wind wheel pitch adjustment mechanisms are driven by servo motors (M38, M28); the The pitch servo mechanism is electrically connected with the centralized control device of the unit in such a way that the speed of the main wind rotor and the auxiliary wind rotor can be adjusted according to the change of the pitch angle. 8. The dual-rotor wind power generation excitation control system as claimed in claim 7, wherein the swept area of the main rotor blade of the wind generator (M) is about 3 times the swept area of the blade of the secondary rotor, The sweeping area is the area formed by the rotation of the wind rotor; the main wind rotor rotates against the wind in the downwind direction, and the auxiliary wind rotor rotates against the wind in the upwind direction; there is a gap between the auxiliary wind rotor and the exciter to avoid The preset distance (L) between the auxiliary wind wheel and the tower collision; the brake (15) is connected with the centralized control device of the unit in an electrical manner that can start working when the auxiliary wind wheel speed is 0. 9. The dual-rotor wind power generation excitation control system according to claim 8, characterized in that the number of pole pairs Pg of the stator winding is set to be greater than the number of pole pairs Pe of the permanent magnet outer rotor, and the main wind power arranged on the main transmission shaft The wheel (3) rotates at the speed of Nzr relative to the stator (16) with Pg pole logarithm under the wind force, and the speed of the main wind wheel satisfies the following relational configuration: $\mathrm{<span\; class="notranslate">\; Nzr</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 60</span>}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; fg</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; fe</span>}<span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; Pg</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; Pe</span>}}$ Among them: Nzr represents the speed of the main wind rotor; Pg represents the number of pole pairs of the stator winding; Pe represents the number of pole pairs of the permanent magnet outer rotor (41); fg represents the frequency of the stator; fe represents the converted frequency of the permanent magnet external rotor; The number of pole pairs of the stator winding is 3 times the number of pole pairs of the permanent magnet outer rotor; the number of pole pairs of the inner rotor (45) of the exciter is set as the pair of poles of Pe; the number of pole pairs of the generator rotor (14) winding It is set as Pg opposite poles; the inner rotor winding of the exciter and the rotor winding of the generator are connected in reverse phase sequence through the inter-rotor connection line (123); the auxiliary wind wheel (2) of the wind generator is arranged on the auxiliary drive shaft, and the The auxiliary wind wheel drives the permanent magnet outer rotor to rotate at Ne speed, and the converted frequency of the permanent magnet outer rotor satisfies the following relationship: $\mathrm{fe}=\frac{\mathrm{Ne}\&times;\mathrm{Pe}}{60}$ Among them: Ne represents the relative speed of the auxiliary wind wheel to the stator; A permanent magnet outer rotor with a Pe pole logarithm is arranged on the auxiliary drive shaft to rotate in reverse with respect to the main wind wheel at the speed of Nzre. The rotational speed of the permanent magnet outer rotor relative to the inner rotor of the exciter satisfies the following relationship: Nzre=Nzr+Ne Wherein: Nzre represents the speed at which the permanent magnet outer rotor rotates relative to the inner rotor of the exciter; the main and auxiliary transmission shafts have hollow through holes (130) with preset diameters, and the transmission shafts are configured by bearings on the generator ( 115,116) and the bearing (147,148) support on the exciter. 10. The dual-rotor wind power generation excitation control system as claimed in claim 9, characterized in that, the auxiliary wind rotor (2) of the wind generator (M) is configured with a transmission structure that rotates in opposite directions relative to the main wind rotor; The auxiliary wind wheel is arranged in an upwind direction and rotates against the wind; the main wind wheel is arranged in a downwind direction and rotates against the wind; the permanent magnets (43) are arranged in groups, and the number of pole pairs matches the number of pole pairs of the inner rotor of the exciter ; The yoke (42) of the permanent magnet (43) of the device is arranged in the permanent magnet outer rotor casing (410). 11. The dual-rotor wind power generation excitation control system according to claim 10, characterized in that there is a preset distance (L) between the auxiliary wind rotor and the exciter to avoid collision between the auxiliary wind rotor and the tower.

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