CN201045750Y - External rotor brushless dual-feed generator and controller thereof - Google Patents

External rotor brushless dual-feed generator and controller thereof Download PDF

Info

Publication number
CN201045750Y
CN201045750Y CNU2007200960092U CN200720096009U CN201045750Y CN 201045750 Y CN201045750 Y CN 201045750Y CN U2007200960092 U CNU2007200960092 U CN U2007200960092U CN 200720096009 U CN200720096009 U CN 200720096009U CN 201045750 Y CN201045750 Y CN 201045750Y
Authority
CN
China
Prior art keywords
generator
exciter
stator
unit
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNU2007200960092U
Other languages
Chinese (zh)
Inventor
王华君
杨彦杰
商建锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
XINYUAN ELECTRICAL SCI-TECH Co Ltd TIANJIN
Original Assignee
XINYUAN ELECTRICAL SCI-TECH Co Ltd TIANJIN
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by XINYUAN ELECTRICAL SCI-TECH Co Ltd TIANJIN filed Critical XINYUAN ELECTRICAL SCI-TECH Co Ltd TIANJIN
Priority to CNU2007200960092U priority Critical patent/CN201045750Y/en
Application granted granted Critical
Publication of CN201045750Y publication Critical patent/CN201045750Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

The utility model relates to an outer rotor brushless doubly-fed generator and a control device, which relates to a wind power generator, comprising a generator main body, a stator, a rotator, a draught fan blade, and a wheel boss, wherein an outer rotor style generator and an exciter field breaker are arranged in the main body, the generator and the exciter field breaker rotor are coaxially arranged, the generator and the exciter field breaker are arranged in series in an axial direction structure. A controlling device is provided with a set centralized control device, an exciter field breaker alternate current field excitation device, a generator magnetic assist device, a generator rotary speed sensor, and a draught fan braking controller. The set centralized control device is provided with a signal input port which is measured by a sensor, the major loop input side of the exciter field breaker alternate current field excitation device is connected with the input end of the stator of the generator, and the major loop output side is connected with a winding of the stator of the exciter field breaker. The major loop of the generator magnetic assist device is connected with the output end of the generator which is connected with electrified wire netting. The utility model has the advantages of light weight, brush-free, direct-driving, low control cost, high set safety, reliability, operation efficiency, and convenient reactive-load regulation, and directly drives, and does not have a gear case.

Description

External rotor brushless double feed generator and control device thereof
Technical field
The utility model relates to wind-driven generator, particularly variable speed constant frequency winding type external rotor brushless double feed generator and control device thereof.
Background technology
The known techniques double fed induction generators is as variable speed constant frequency type unit, in the hydroelectric station, hydroenergy storage station, particularly in Large-scale Wind Turbines, be used widely, because of its unit can variable speed constant frequency the characteristics of operation, the energy conversion efficiency of generating set is improved greatly; Meritorious and idle because of its small-power convertor assembly regulating generator group by rotor-side again, the control characteristic of unit and control cost and make us very satisfied.Because large-scale MW grade wind driven generator unit rotating speed is very low, generally at 15-35rpm, so low rotating speed will make the increase of motor number of pole-pairs, motor physical dimension and weight all increase greatly.Present way is by the step-up gear raising speed, though that gear box efficient can reach 97% failure rate is higher, this way can be selected the high speed double fed induction generators for use, is generally 4/6 utmost point motor, thereby alleviates the trouble on motor manufacturing and the cost.Along with the unit of the increase of marine wind electric field unit capacity such as 3-5MW unit even 10MW capacity in research and development.The reliability of this kind of unit; it mainly is the shutdown that causes by slip ring and gearbox fault; become outstanding problem, for the consideration to wind-powered electricity generation unit reliability, system's conversion efficiency and unit integrated cost, permanent magnet direct-drive type synchro wind generator group is just arisen at the historic moment.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.This unit removes loss system efficient, the frequent step-up gear of fault, do not transmit the slip-ring brush of big electric current, adopt the permanent magnetic material excitation, excitation loss reduces, generator sends the low frequency ac of frequency change, be incorporated into the power networks by the total power frequency converter, thus the variable speed constant frequency generator of realization wind-powered electricity generation unit.Permanent magnet direct-drive type synchro wind generator group is owing to its good reliability, and very high system effectiveness is though the unit expense is higher than many advantages such as the former its maintenance cost is low.This type exists the motor diameter size huge, installation and transportation inconvenience, and generator and full power convertor cost height, technological deficiencies such as idle adjusting are carried out in generator operation inconvenience.
Summary of the invention
Problem to be solved in the utility model is, overcomes the above-mentioned defective that the technology of taking over exists, and a kind of external rotor brushless double feed generator and control device thereof are provided.
One of the utility model purpose provides a kind of external rotor brushless double feed generator;
Two of this case purpose provides a kind of control device of external rotor brushless double feed generator.
It is to take following technical scheme to realize that this case solves the external rotor brushless double feed generator technical problem:
A kind of external rotor brushless double feed generator that provides according to the utility model, comprise generator main body, stator, rotor, fan blade, wheel hub, fan blade is installed on the wheel hub, in the generator main body, the structure setting of rotor relative stator rotation, fan blade drives wheel hub and drives the rotor rotation, wherein, external-rotor-type generator and exciter are set in the main body, the coaxial installation of generator and exciter rotor, generator and exciter shaft are to the cascaded structure setting; Generator and exciter be independent magnetic circuit separately, and generator amature winding number of pole-pairs is identical with generator unit stator winding number of pole-pairs, and exciter rotor winding number of pole-pairs is identical with exciter stator winding number of pole-pairs; The generator unit stator winding generator magnetic assist device that is connected in parallel.
This case solves the external rotor brushless double feed generator technical problem and also can further realize according to following technical measures:
Aforesaid external rotor brushless double feed generator, wherein, generator by electricity generator stator core, be contained in generator unit stator winding, the generator rotor core in this iron core slot, the generator amature winding that is contained in this iron core slot is formed, generator amature around the generator unit stator rotation, is provided with power generator air gap between electricity generator stator core and the generator rotor core in the generator unit stator outside; Generator magnetic assist device is installed in the internal stator output shaft cylindrical space.
Aforesaid external rotor brushless double feed generator, wherein, exciter by the exciter stator iron core, be contained in exciter stator winding, the exciter rotor iron core in this iron core slot, the exciter rotor winding that is contained in this iron core slot is formed, exciter rotor rotates around exciter stator in the exciter stator outside, be provided with the exciter air gap between exciter stator iron core and the exciter rotor iron core, the exciter stator winding is connected with excitation unit; Excitation unit is installed in the internal stator output shaft cylindrical space;
Exciter stator iron core and electricity generator stator core are installed the exciter stator shell and the generator unit stator shell outside respectively, and two shells and motor support plate connect into an integral body;
Exciter rotor iron core and generator rotor core are installed in the same motor housing, support two rotors around the stator rotation by motor left bearing and motor right bearing.
Aforesaid external rotor brushless double feed generator, wherein, generator amature winding and exciter rotor winding are Wound-rotor type wave winding structure, star-star connection mode, the exciter rotor winding is connected with generator amature winding negative-phase sequence by rotor winding connecting line.
Aforesaid external rotor brushless double feed generator, wherein, the wheel hub that fan blade is installed is provided with general pulp distance varying mechanism, pulp distance varying mechanism is under the control of unit centralized control equipment, by changing the propeller pitch angle of blade, realize the adjusting of wind speed round, the wheel hub mounting panel is in order to be connected wheel hub with motor output shaft.
Aforesaid external rotor brushless double feed generator, wherein, generator is provided with motor inclination installing mechanism, the motor housing bottom is connected with motor support plate, make motor inclination 5-10 degree, in case uppermost leaf sheet when work and the scratch of tower tube are installed Yawing mechanism between motor base place and the tower tube top.
The control device technical problem that the utility model solves external rotor brushless double feed generator is to take following technical scheme to realize:
The control device of a kind of external rotor brushless double feed generator that provides according to the utility model, comprise the unit centralized control equipment, centralized control equipment connects signal transducer, be provided with the control signal output ends mouth, wherein: generator magnetic assist device, generator speed transducer and blower fan brake monitor that control device is provided with unit centralized control equipment, exciter AC excitation device, is connected in parallel with the generator unit stator winding;
The unit centralized control equipment is provided with the signal input port of air velocity transducer measurement, the signal input port that wind transducer is measured, and is provided with the output signal port with the host computer telecommunication; The unit centralized control equipment is connected with the generator terminal voltage instrument transformer, to record generator terminal voltage numerical value, is connected with the generator output current transformer, to record generator output current numerical value; The unit centralized control equipment is connected with the exciting voltage instrument transformer, to record the exciter excitation voltage value, is connected with the exciting current instrument transformer, to record the exciter excitation current values; The unit centralized control equipment connects generator speed transducer and blower fan brake monitor;
Exciter AC excitation device major loop input side is encouraged switch and generator unit stator output by throwing and is incorporated into the power networks that switch is inboard to be connected, and the AC excitation device is accepted the control command of unit centralized control equipment, and its outlet side major loop is connected with the exciter stator winding;
Generator magnetic assist device major loop is connected with generator output end, and accepts the control command of unit centralized control equipment, and generator output end is connected with electrical network by the switch that is incorporated into the power networks, step-up transformer.
The control device technical problem that this case solves external rotor brushless double feed generator also can further realize according to following technical measures:
The control device of aforesaid external rotor brushless double feed generator, wherein, the unit centralized control equipment connects the control Yawing mechanism, make the rotation of wind wheel upwind, the unit centralized control equipment keeps moving, moving with the generator rated output power more than the rated wind speed with the optimal wind energy utilance below the wind wheel rated wind speed by the closed-loop control pulp distance varying mechanism; Pulp distance varying mechanism connects tachometric survey device, propeller pitch angle measuring appliance, becomes oar servomechanism, servomotor, variable pitch control device.
The control device of aforesaid external rotor brushless double feed generator, wherein, the excitation unit major loop is made up of two groups of biphase rectification-inversion units; When generator moves below synchronous speed, excitation unit provides exciting current and the meritorious energy of part to exciter stator, when generator moves, when excitation unit provides exciting current to exciter stator, the meritorious energy feedback of part is arranged to electrical network more than synchronous speed; Excitation unit is write to each other by control loop realization and unit centralized control equipment.
The control device of aforesaid external rotor brushless double feed generator, wherein, the unit centralized control equipment is provided with the electric machine temperature rise monitoring port, is provided with wind wheel brake signal output port; Generator magnetic assist device is provided with capacitor, and it drops into quantity to capacitor by SCR control, and silicon controlled conducting control is finished by the unit centralized control equipment.
The utility model compared with prior art has significant advantage and beneficial effect.By above technical scheme as can be known, the utility model has following advantage at least under the structural arrangements of excellence:
The utility model adopts winding type external rotor brushless double feed generation technology scheme, realized the variable speed constant frequency operation of unit in the large-scale wind generating field, have non-brushing, directly drive, non-gear box, with the unsteady flow excitation unit of about 1/3 generator rated capacity, the conveniently adjusted idle technological merit that waits.The utility model has effectively been simplified the machine set constructor, has dwindled the generator diameter, has reduced unit weight, is convenient to the equipment transportation; Reduce the control system cost, improved fail safe, reliability and the operational efficiency of unit.The utility model contrast prior art has significant contribution and progress, is really to have novelty, creativeness, practical good technology.
Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram;
Fig. 2 is the utility model operation principle structural representation block diagram;
Fig. 3 is the utility model unit centralized control equipment hardware configuration schematic block diagram.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, embodiment, structure, feature and effect thereof that foundation the utility model is provided, describe in detail as after.
As Figure 1-3.
A kind of external rotor brushless double feed generator, comprise generator main body, stator, rotor, fan blade 2, wheel hub 1, fan blade 2 is installed on the wheel hub 1, in the generator main body, the structure setting of rotor relative stator rotation, fan blade 2 drives wheel hub 1 and drives the rotor rotation, and external-rotor-type generator and exciter are set in its main body, generator and exciter rotor are installed to axle, and generator and exciter shaft are to the cascaded structure setting; Generator and exciter be independent magnetic circuit separately, and generator amature winding 15 numbers of pole-pairs are identical with generator unit stator winding 14 numbers of pole-pairs, and exciter rotor winding 16 numbers of pole-pairs are identical with exciter stator winding 7 numbers of pole-pairs.
Winding type external rotor brushless double feed motor (WBDFG) structure:
WBDFG is by more than two utmost point winding rotor motor being composited P PTo utmost point motor is generator, P CTo utmost point motor is exciter, and its two motors number of pole-pairs relation satisfies: P P〉=P CThe independent separately iron circuit of generator and exciter is installed in the shell.Coaxial installation of two rotors and winding are that Wound-rotor type wave winding structure, lead are copper or aluminium material, rotor is that heterogeneous the best is a three-phase, rotor winding number of pole-pairs is with the stator winding number of pole-pairs is identical separately, and two rotor windings are star-like wiring, and two rotor winding terminal negative-phase sequences connect.
The external rotor brushless double feed generator outer-rotor structure:
In order to utilize the inner space of motor cylindrical shape motor output shaft 6, adopt outer-rotor structure.As scheming: fan blade 2 is installed on the wheel hub 1, is provided with general pulp distance varying mechanism 29 in the wheel hub 1, and pulp distance varying mechanism 29 by changing the propeller pitch angle of blade 2, is realized the adjusting of wind speed round under the control of unit centralized control equipment 24.Wheel hub mounting panel 3 is in order to be connected wheel hub 1 with motor output shaft 6.
External-rotor-type WBDFG is made up of to cascaded structure exciter and generator shaft.The exciter of double as generating by exciter stator iron core 9, be contained in exciter stator winding 7, the exciter rotor iron core 8 in this iron core slot, the exciter rotor winding 16 that is contained in this iron core slot is formed, exciter rotor rotates around exciter stator in the exciter stator outside, be provided with exciter air gap 12 between exciter stator iron core 9 and the exciter rotor iron core 8, exciter stator winding 7 links to each other with excitation unit 23, and exciter rotor winding 16 is connected with generator amature winding 15 negative-phase sequences by rotor winding connecting line 13.Generator by electricity generator stator core 11, be contained in generator unit stator winding 14, the generator rotor core 10 in this iron core slot, the generator amature winding 15 that is contained in this iron core slot is formed, the sub-rotor that generates electricity rotates around generator unit stator in the generator unit stator outside, be provided with power generator air gap 17 between electricity generator stator core 11 and the generator rotor core 10, generator unit stator winding 14 is in parallel with generator magnetic assist device 22.
Exciter stator iron core 9 and electricity generator stator core 11 are installed in the exciter stator shell 32 and generator unit stator shell 33 outsides that diameter does not wait respectively, two shells and motor left side axle head supporting bracket 21, motor middle part supporting bracket 31 and the right axle head supporting bracket 30 of motor connect into an integral body, and with cabin bonnet 20 and motor 27 annular connections of supporting bracket are installed.
Exciter rotor iron core 8 is installed in the same motor housing 28 with generator rotor core 10, motor housing 28 is connected with motor right end cap 5 with motor left end cap 18 respectively, and two end cap supports two rotors around the stator rotation by motor left bearing 19 and motor right bearing 4.
Motor housing 28 bottoms are connected with motor support plate 27, make motor inclination 5-10 degree, in case uppermost leaf sheet when work scratches with tower tube 26, install Yawing mechanism 25 between motor base place and the tower tube top.
Generator magnetic assist device 22 is loaded in the internal stator output shaft cylindrical space, with generator unit stator winding 14 and connect, excitation unit 23 is loaded in the internal stator output shaft cylindrical space, be connected with exciter stator winding 7, unit centralized control equipment 24 is loaded in the internal stator output shaft cylindrical space, is connected with associated components inside and outside the unit.
A kind of control device of external rotor brushless double feed generator, comprise the unit centralized control equipment, centralized control equipment connects signal transducer, be provided with the control signal output ends mouth, wherein, control device is provided with unit collection control device 24, exciter AC excitation device 23, generator magnetic assist device 22, wind speed and direction measuring device, generator speed transducer and blower fan brake monitor;
Unit centralized control equipment 24 is provided with signal input port D1, the signal input port D2 that wind transducer is measured that air velocity transducer is measured, and is provided with the output signal port D3 with the host computer telecommunication; Unit centralized control equipment 24 is connected with generator terminal voltage instrument transformer T2, and to record generator terminal voltage numerical value, T3 is connected with the generator output current transformer, to record generator output current numerical value; Unit centralized control equipment 24 is connected with exciting voltage instrument transformer T5, and to record the exciter excitation voltage value, T4 is connected with the exciting current instrument transformer, to record the exciter excitation current values; Unit centralized control equipment 24 connects generator speed transducer and blower fan brake monitor;
Exciter AC excitation device 23 major loop input sides are encouraged K switch 2 and generator unit stator output by throwing and are incorporated into the power networks that switch is inboard to be connected, AC excitation device 23 is accepted the control command of unit centralized control equipment 24, and its outlet side major loop is connected with the exciter stator winding;
Generator magnetic assist device 22 major loops are connected with generator output end, and accept the control command of unit centralized control equipment 24, and generator output end is connected with electrical network by the K switch 1 that is incorporated into the power networks, step-up transformer T1.
Winding type external rotor brushless double feed motor WBDFG control device structure:
The WBDFG control device comprises unit centralized control equipment, exciter AC excitation device, generator magnetic assist device, yawer, change oar controller, wind speed and direction measuring device, generator speed transducer, blower fan brake monitor etc.
Unit centralized control equipment 24 is provided with control computer 24-3 in control unit 24-1, touch-screen 24-2, the upper far-end, automatic paralleling device 24-4, generating pusher side adaptation unit 24-5, exciter side adaptation unit 24-6, protection control unit 24-7.Control unit 24-1 is provided with wind speed, wind direction, rotating speed, electric machine temperature rise signal input port, signal output ports such as K switch 1, K switch 2, driftage control, the adjusting of change oar, the output of untying the mooring rope, wind wheel brake switch.
Unit centralized control equipment 24 is provided with the signal input port D1 that air velocity transducer is measured, the signal input port D2 that wind transducer is measured, be provided with the output signal port D3 with the host computer telecommunication, be provided with the electric machine temperature rise monitoring port, be provided with wind wheel brake signal output port.
Unit centralized control equipment 24 is connected with voltage transformer T2, and to record generator terminal voltage numerical value, T3 is connected with current transformer, to record generator output current numerical value.
Unit centralized control equipment 24 is connected with voltage transformer T5, and to record the exciter excitation voltage value, T4 is connected with current transformer, to record the exciter excitation current values.AC excitation device 23 major loop input sides are encouraged K switch 2 and generator unit stator output by throwing and are incorporated into the power networks that switch is inboard to be connected, AC excitation device 23 is accepted the control command of unit centralized control equipment 24, its outlet side major loop is connected with WBDFG exciter stator winding, and excitation unit 23 major loops are made up of two groups of two-way PWM rectification-inversion unit Q1, Q2.When WBDFG moves below synchronous speed, Q1PWM rectification, Q2PWM inversion, excitation unit 23 provides exciting current and the meritorious energy of part to exciter stator, when WBDFG moves more than synchronous speed, Q1PWM inversion, Q2PWM rectification, excitation unit 23 has the meritorious energy feedback of part to electrical network when exciter stator provides exciting current.Excitation unit 23 is write to each other by control loop realization and unit centralized control equipment 24.
Generator magnetic assist device 22 major loops are connected with generator output end, and accept the control command of unit centralized control equipment 24.Generator magnetic assist device 22 is made up of n+1 capacitor, and by its input quantity of SCR control, silicon controlled conducting control is finished by unit centralized control equipment 24, and generator output end is connected with electrical network by the K switch 1 that is incorporated into the power networks, step-up transformer 690/110000V TI.
Unit centralized control equipment 24 makes the rotation of wind wheel upwind by Yawing mechanism 25 control WBDFG, unit centralized control equipment 24 is by spare time ring control pulp distance varying mechanism 29, and maintenance wind wheel rated wind speed is following to be moved, move with the generator rated output power more than the rated wind speed with the optimal wind energy utilance.Pulp distance varying mechanism 29 comprises that the G1 of tachometric survey mechanism, propeller pitch angle measuring mechanism G2, change oar servomechanism G3, servomotor M1, variable pitch control device G4 form.
Winding brushless double feed motor WBDFG electric control method is as follows:
The excitation system of WBDFG is combined by AC excitation device 23 and generator magnetic assist device 22, and under the control of unit centralized control equipment 24, the excitation of finishing generator is boosted, generated electricity by way of merging two or more grid systems and idle adjusting.
Excitation control: wind energy conversion system is below rated speed, drive the WBDFG rotation with certain speed, generator is in and electrical network parallel off state, exciter is prepared to throw and is encouraged, generator magnetic assist device 22 is under the adjusting of unit centralized control equipment 24, make generator set up voltage gradually, record generator output voltage by unit centralized control equipment 24 by T2, when the unloaded output voltage of generator reaches rated output voltage 30%-60%, unit centralized control equipment 24 makes the K2 closure, and exciter AC excitation device 23 is thrown and encouraged, and unit centralized control equipment 24 is regulated AC excitation device 23, make generator voltage reach specified output valve, make generator frequency reach the requirement of being incorporated into the power networks, prepare to be incorporated into the power networks.
The control of being incorporated into the power networks: unit centralized control equipment 24 passes through T2, T6 is to K1 both sides voltage, phase sequence, frequency reaches by the measurement of G to the wind energy conversion system rotating speed, under the generator output end condition consistent with the power network wiring phase sequence, amplitude and frequency that unit centralized control equipment 24 is regulated AC excitation device 23 voltages, tracking is to the data of grid side and wind energy conversion system tachometric survey, voltage magnitude when generator output end and grid side, after phase sequence and frequency reach the consistency of interconnection technology requirement, send signal by unit centralized control equipment 24 built-in synchronous devices, make generator connecting in parallel with system K switch 1 auto-closing, finish and be incorporated into the power networks.
The variable speed constant frequency Characteristics Control: GB regulation wind-driven generator output voltage frequency scope is at present: 47.5Hz-51Hz.No matter how generator speed to change, its stator voltage frequency satisfies the frequency range of this GB regulation and identical with mains frequency, and the wind-powered electricity generation unit has just been realized the variable speed constant frequency operation.Concrete control procedure is as follows:
Along with change of wind velocity, unit centralized control equipment 24 is regulated the propeller pitch angle of pneumatic equipment blades made 2 by control pulp distance varying mechanism 29 in the mode of knowing, can regulator generator mechanical separator speed ω r AC excitation device 23 is f by the AC excitation power frequency of exciter stator winding 7 feed-ins C, it is S that this frequency rotating magnetic field produces its frequency of induced current at exciter rotor winding 16 Cf C, the generator amature winding 15 of this rotor current by being connected with exciter rotor winding 16 negative-phase sequences, the excitation field of formation generator unit stator winding 14, the mechanical rotation speed of the relative generator amature of this excitation field is ω 2 = 2 π 60 S C f C P P , The generator unit stator electric voltage frequency is mains frequency f 1, the rotary speed in this frequency magnetic field is ω 1 = 2 π 60 f 1 P P . During synchronous working, the angular speed of the mechanical angle speed of generator amature and the excitation field of relative its rotation rotation synchronously the two and or poor, the angular speed that rotates synchronously with stator field is synchronous all the time, the triadic relation represents with following formula.
ω 1r± ω 2Perhaps ω 1 = 2 π 60 f 1 P P = ω r ± 2 π 60 S C f C P P
In the formula: when generator speed is lower than the same leg speed of WBDFG, get "+" number
When generator speed is higher than the same leg speed of WBDFG, get "-" number
Thus with generator unit stator output voltage frequency f 1Be target, regulating the wind energy conversion system rotating speed is generator speed ω rWith exciter stator exciting current frequency f CForm closed-loop control, just can realize the variable speed constant frequency Characteristics Control of WBDFG.
Meritorious control:
The rotating speed of WBDFG also can be expressed as:
General expression N = 60 ( 50 ± f C ) P P + P C Synchronous speed N 0 = 60 × 50 P P + P C f C=0
N wherein: the wind energy conversion system rotating speed is generator speed f C: exciter stator exciting current frequency
In this relational expression, as N<N 0The time, when AC excitation device 23 provides exciting current to exciter stator winding 7, the active power of feed-in slippage capacity also, its feed-in exciting current phase sequence turns to and the generator switched in opposite exciter rotor, and above-mentioned expression formula is got "-" number, as N>N 0The time, when AC excitation device 23 provided exciting current to exciter stator winding 7, also to the active power of electrical network feed-in slippage capacity, its feed-in exciting current phase sequence turned to exciter rotor to turn to identically with generator, and above-mentioned expression formula is got "+" number.In aforementioned variable speed constant frequency characteristic control method,, realize the meritorious control of unit stage by stage by different rule regulator generator rotating speeds.After WBDFG is incorporated into the power networks, when wind energy conversion system moves below being lower than rated wind speed, the propeller pitch angle that unit centralized control equipment 24 is regulated pneumatic equipment blades made 2 by control pulp distance varying mechanism 29 in the mode of knowing makes its rotating speed with the operation of power coefficient max model, and this stage is the wind energy utilization maximization stage.In this stage, when being lower than synchronous speed, generator speed promptly gets "-" number interval, the interval exciter of this rotating speed also needs to equal from the electrical network absorptive capacity active power of generator slip power when excitation is provided, this part active power is exported to generator unit stator winding 14 through exciter stator winding 7, exciter rotor winding 16, generator amature winding 15, this part active power does not have contribution and certain internal loss is arranged electrical network, and this interval WBDFG generator efficiency is minimum.When generator with synchronous speed work constantly, i.e. f C=0 state, exciter have only the exciting power input, the independent active power of output of generator, and the WBDFG generator efficiency is higher this moment.When being higher than synchronous speed, generator speed promptly gets "+" number interval, when this interval exciter provides excitation, also has the active power identical from generator amature winding 15, exciter rotor winding 16, through exciter stator winding 7 feed-in electrical networks with the generator slip power, this interval generator, exciter bilateral are meritorious to the electrical network contribution simultaneously, be so-called double-fed generating, this interval WBDFG generator efficiency is very high.When wind energy conversion system during in the operation of specified and above wind speed, the propeller pitch angle that unit centralized control equipment 24 is regulated pneumatic equipment blades made 2 by control pulp distance varying mechanism 29 in the mode of knowing makes its rotating speed substantially constant, WBDFG is with the operation of rated power output mode, and this stage is permanent power output stage.Permanent power output stage WBDFG is the double-fed generating, generator most effective.
Voltage and idle control: WBDFG all can be incorporated into the power networks under different rotating speeds, it is preceding after frequency, phase sequence meet the demands to be incorporated into the power networks, generator magnetic assist device 22 is under the adjusting of unit centralized control equipment 24, make generator set up voltage gradually, record generator output voltage by unit centralized control equipment 24 by T2, when the unloaded output voltage of generator reaches rated output voltage 30%-60%, unit centralized control equipment 24 is by the size of adjusting excitation unit 23 AC excitation electric currents, thus the height of regulator generator output voltage.After the generator connecting in parallel with system operation, unit centralized control equipment 24 makes WBDFG satisfy the GB requirement to the power factor of electrical network feed, cos =± 0.975 by regulating excitation unit 23 and generator magnetic assist device 22.The utility model utilizes the additive excitation device combination of AC excitation device with the generating pusher side of exciter side, finishes the idle control of satisfying the GB requirement according to the wind energy turbine set service requirement under the adjusting of unit centralized control equipment.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims (10)

1. external rotor brushless double feed generator, comprise generator main body, stator, rotor, fan blade (2), wheel hub (1), fan blade (2) is installed on the wheel hub (1), in the generator main body, the structure setting of rotor relative stator rotation, fan blade (2) drive wheel hub (1) and drive the rotor rotation, it is characterized in that: external-rotor-type generator and exciter are set in the main body, the coaxial installation of generator and exciter rotor, generator and exciter shaft are to the cascaded structure setting; Generator and exciter be independent magnetic circuit separately, and generator amature winding (15) number of pole-pairs is identical with generator unit stator winding (14) number of pole-pairs, and exciter rotor winding (16) number of pole-pairs is identical with exciter stator winding (7) number of pole-pairs; Generator unit stator winding (14) the generator magnetic assist device (22) that is connected in parallel.
2. external rotor brushless double feed generator as claimed in claim 1, it is characterized in that: generator by electricity generator stator core (11), be contained in generator unit stator winding (14), the generator rotor core (10) in this iron core slot, the generator amature winding (15) that is contained in this iron core slot is formed, generator amature around the generator unit stator rotation, is provided with power generator air gap (17) between electricity generator stator core (11) and the generator rotor core (10) in the generator unit stator outside; Generator magnetic assist device (22) is installed in the internal stator output shaft cylindrical space.
3. external rotor brushless double feed generator as claimed in claim 1 or 2, it is characterized in that: exciter by exciter stator iron core (9), be contained in exciter stator winding (7), the exciter rotor iron core (8) in this iron core slot, the exciter rotor winding (16) that is contained in this iron core slot is formed, exciter rotor rotates around exciter stator in the exciter stator outside, be provided with exciter air gap (12) between exciter stator iron core (9) and the exciter rotor iron core (8), exciter stator winding (7) is connected with excitation unit (23); Excitation unit (23) is installed in the internal stator output shaft cylindrical space;
Exciter stator iron core (9) and electricity generator stator core (11) are installed the exciter stator shell (32) and generator unit stator shell (33) outside respectively, and two shells and motor support plate connect into an integral body;
Exciter rotor iron core (8) is installed in the same motor housing (28) with generator rotor core (10), supports two rotors around the stator rotation by motor left bearing (19) and motor right bearing (4).
4. external rotor brushless double feed generator as claimed in claim 3, it is characterized in that: generator amature winding (15) and exciter rotor winding (16) are connected with generator amature winding (15) negative-phase sequence by rotor winding connecting line (13) for Wound-rotor type wave winding structure, star-star connection mode, exciter rotor winding (16).
5. external rotor brushless double feed generator as claimed in claim 4, it is characterized in that: the wheel hub (1) that fan blade (2) is installed is provided with general pulp distance varying mechanism (29), pulp distance varying mechanism (29) is under the control of unit centralized control equipment (24), by changing the propeller pitch angle of blade (2), realize the adjusting of wind speed round, wheel hub mounting panel (3) is in order to be connected wheel hub (1) with motor output shaft (6).
6. external rotor brushless double feed generator as claimed in claim 1, it is characterized in that: generator is provided with the inclination installing mechanism, motor housing (28) bottom is connected with motor support plate (27), makes motor inclination 5-10 degree, installs Yawing mechanism (25) between motor base place and the tower tube top.
7. the control device of an external rotor brushless double feed generator, comprise the unit centralized control equipment, centralized control equipment connects signal transducer, be provided with the control signal output ends mouth, it is characterized in that: generator magnetic assist device (22), generator speed transducer and blower fan brake monitor that control device is provided with unit centralized control equipment (24), exciter AC excitation device (23), is connected in parallel with generator unit stator winding (14);
Unit centralized control equipment (24) is provided with the signal input port (D1) of air velocity transducer measurement, the signal input port (D2) that wind transducer is measured, and is provided with the output signal port (D3) with the host computer telecommunication; Unit centralized control equipment (24) is connected with generator terminal voltage instrument transformer (T2), and to record generator terminal voltage numerical value, (T3) is connected with the generator output current transformer, to record generator output current numerical value; Unit centralized control equipment (24) is connected with exciting voltage instrument transformer (T5), and to record the exciter excitation voltage value, (T4) is connected with the exciting current instrument transformer, to record the exciter excitation current values; Unit centralized control equipment (24) connects generator speed transducer and blower fan brake monitor;
Exciter AC excitation device (23) major loop input side is encouraged switch (K2) and generator unit stator output by throwing and is incorporated into the power networks that switch is inboard to be connected, AC excitation device (23) is accepted the control command of unit centralized control equipment (24), and its outlet side major loop is connected with the exciter stator winding;
Generator magnetic assist device (22) major loop is connected with generator output end, and accepts the control command of unit centralized control equipment (24), and generator output end is connected with electrical network by the switch that is incorporated into the power networks (K1), step-up transformer (T1).
8. the control device of external rotor brushless double feed generator as claimed in claim 7, it is characterized in that: unit centralized control equipment (24) connects control Yawing mechanism (25), make the rotation of wind wheel upwind, unit centralized control equipment (24) keeps moving, moving with the generator rated output power more than the rated wind speed with the optimal wind energy utilance below the wind wheel rated wind speed by closed-loop control pulp distance varying mechanism (29); Pulp distance varying mechanism (29) connects tachometric survey device (G1), propeller pitch angle measuring appliance (G2), becomes oar servomechanism (G3), servomotor (M1), variable pitch control device (G4).
9. as the control device of claim 7 or 8 described external rotor brushless double feed generators, it is characterized in that: excitation unit (23) major loop is made up of two groups of biphase rectification-inversion units; When generator moves below synchronous speed, excitation unit (23) provides exciting current and the meritorious energy of part to exciter stator, when generator moved more than synchronous speed, excitation unit (23) had the meritorious energy feedback of part to electrical network when exciter stator provides exciting current; Excitation unit (23) is write to each other by control loop realization and unit centralized control equipment (24).
10. the control device of external rotor brushless double feed generator as claimed in claim 9 is characterized in that: unit centralized control equipment (24), be provided with the electric machine temperature rise monitoring port, and be provided with wind wheel brake signal output port; Generator magnetic assist device (22) is provided with capacitor, and it drops into quantity to capacitor by SCR control, and silicon controlled conducting control is finished by unit centralized control equipment (24).
CNU2007200960092U 2007-05-15 2007-05-15 External rotor brushless dual-feed generator and controller thereof Expired - Fee Related CN201045750Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2007200960092U CN201045750Y (en) 2007-05-15 2007-05-15 External rotor brushless dual-feed generator and controller thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2007200960092U CN201045750Y (en) 2007-05-15 2007-05-15 External rotor brushless dual-feed generator and controller thereof

Publications (1)

Publication Number Publication Date
CN201045750Y true CN201045750Y (en) 2008-04-09

Family

ID=39309219

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2007200960092U Expired - Fee Related CN201045750Y (en) 2007-05-15 2007-05-15 External rotor brushless dual-feed generator and controller thereof

Country Status (1)

Country Link
CN (1) CN201045750Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546981B (en) * 2009-05-08 2010-11-10 邓允河 Vertical wind power generator with motor startup mode
CN104836406A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Synchronization exciter and work method thereof
CN104836405A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Shaftless synchronization exciter and work method thereof
CN104836404A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Dual-feed exciter and work method thereof
CN105826785A (en) * 2016-05-18 2016-08-03 陈智仁 Contactless energy transfer collector ring
ITUB20159886A1 (en) * 2015-12-23 2017-06-23 Cristofaro Alberto De Synchronous alternator with polyphase winding rotor.

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546981B (en) * 2009-05-08 2010-11-10 邓允河 Vertical wind power generator with motor startup mode
CN104836406A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Synchronization exciter and work method thereof
CN104836405A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Shaftless synchronization exciter and work method thereof
CN104836404A (en) * 2015-05-25 2015-08-12 湖南零陵恒远发电设备有限公司 Dual-feed exciter and work method thereof
ITUB20159886A1 (en) * 2015-12-23 2017-06-23 Cristofaro Alberto De Synchronous alternator with polyphase winding rotor.
CN105826785A (en) * 2016-05-18 2016-08-03 陈智仁 Contactless energy transfer collector ring

Similar Documents

Publication Publication Date Title
CN100546153C (en) Winding type external rotor brushless double feed generator and control device thereof
CN201039068Y (en) Speed-variable frequency constant coiling brushless and dual-feedback generator control device
CN100495900C (en) Telescopic Double-rotor variable speed and variable frequency power generator
CN201045750Y (en) External rotor brushless dual-feed generator and controller thereof
CN101001036B (en) Variable-speed constant-frequency wind motor and excitation control system thereof
CN1976178B (en) Variable speed constant frequency excitation control system
CN100508364C (en) Wind power generation excitation control method and serial double-rotor generator
US7633176B1 (en) Direct drive induction electrical power generator
CN101051779B (en) Winding type internal rotor brushless double feed generator and its control device
CN201448187U (en) Brushless excitation synchronous wind turbine generator system
CN100492870C (en) Constant frequency speed changing control system for telescopic double rotor fan
CN201038960Y (en) Internal rotor brushless and double-fed generator and its control device
CN100557941C (en) Winding brushless double feed generator controller
CN201004589Y (en) Serial dual rotor wind power generator and its rate-varying and excitation-varying system
CN100495901C (en) Variable speed and variable frequency wind power generator excitation control system
CN102322401B (en) Novel direct drive type permanent magnet wind generating set
CN201038959Y (en) Overlapping rotor brushless and double-fed generator and its control device
CN100499352C (en) Speed changing and frequency changing exciting control system of overlapped double rotor generator
CN202250614U (en) Novel direct-drive permanent magnet type wind-driven power generator unit
CN1976180B (en) Variable speed variable frequency pneumatic electric machine and excitation control system
CN201425001Y (en) 1.5-MW permanent magnet direct-drive wind-driven power generator unit
CN100495899C (en) Double-rotor variable speed and variable frequency power generator
RU2352809C1 (en) Bolotov's wind-driven electric plant
CN101051780A (en) Winding type overlapped rotor brushless double feed generator and its control device
CN1996745A (en) Speed-varying and frequency-converting excitation method of the cover-overlapping dual-rotor wind-driven machine and its generator

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080409

Termination date: 20100515