CN101621201B - Composite permanent magnet brushless wind power generating set - Google Patents

Composite permanent magnet brushless wind power generating set Download PDF

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Publication number
CN101621201B
CN101621201B CN2009101844162A CN200910184416A CN101621201B CN 101621201 B CN101621201 B CN 101621201B CN 2009101844162 A CN2009101844162 A CN 2009101844162A CN 200910184416 A CN200910184416 A CN 200910184416A CN 101621201 B CN101621201 B CN 101621201B
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China
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permanent magnet
igbt
pwm
speed
inductance
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CN2009101844162A
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CN101621201A (en
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樊英
江和和
葛路明
邹国棠
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Southeast University
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Southeast University
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention relates to a composite permanent magnet brushless wind power generating set mainly consisting of a windmill, a bi-rotor permanent magnet brushless generator, a dual PWM power convertor, a wave filter and a transformer, wherein the bi-rotor permanent magnet brushless generator consists of a permanent magnet low-speed outer rotor, a static silicon iron ring, a permanent magnet high-speed inner rotor and a stator, and the dual PWM power convertor consists of a PWM rectifier, a capacitor and a PWM inverter. The invention solves the problems of mechanical abrasion, noise, maintenance and the like of a mechanical speed-increasing gearbox in the prior wind power generating set. The generator has small volume, light weight, low manufacture cost and high generating efficiency, and can improve power factors and power quality.

Description

A kind of composite permanent magnet brushless wind power generating set
Technical field
The present invention relates to a kind of composite permanent magnet brushless wind power generating set, belong to technical field of wind power generation.
Background technology
Along with the whole society to the giving more sustained attention of the energy and environmental problem, the development and use of regenerative resource present the trend of accelerated development.Wind energy extensively exists on earth and is to be one of the most ripe regenerative resource of technology that people grasped at present.In wind power generation plant, wind turbine generator is an electric energy with wind energy transformation.Wind power generation can be divided into constant-speed and constant-frequency and variable speed constant frequency dual mode.Because constant speed wind-powered electricity generation unit can not realize maximal wind-energy and extract, and variable speed constant frequency class wind-powered electricity generation unit has and can realize that maximal wind-energy follows the trail of and the advantages such as convenience, technology maturation that are incorporated into the power networks, and becomes the main flow of wind power generation.For the safe operation that realizes generator and electrical network and improve the quality of power supply, the usually first rectification of the AC energy that wind-driven generator sends is converted to direct current another mistake and becomes alternating current, is connected to the grid then.In rectification and inverter, (this technology can improve the power factor and the reduction harmonic content of electric energy, improves the quality of power supply Pulse Width Modulation, PWM) the turn-on and turn-off time of technology change power switch pipe usually to adopt pulse-width modulation; (Insulated-GateBipolar Transistor, IGBT) as power switch pipe, its driving power is big and switching speed is very fast usually to use igbt.Put into operation both at home and abroad and the wind power generation plant of researching and developing at present, can be classified as two big classes substantially:
The first kind is to be the high speed Blast Furnace Top Gas Recovery Turbine Unit (TRT) of intermediate link with the mechanical speed-increasing gear box.Usually the wind energy conversion system working speed is lower, has only tens rpms, and traditional synchronous or asynchronous generator limits owing to number of poles, and rotating speed is all higher usually, therefore adopts the mechanical gearbox speedup.But step-up gear not only volume is big and heavy, is attended by the energy delivery loss, and the failure rate height, needs often to safeguard, is one of link the weakest in the wind power generation plant.
Second class is the direct drive type wind generating device, has cancelled speed increasing gear, therefore has advantages such as efficient height, dynamic response is fast, maintenance cost is low.Yet, because directly driving generator works under the low speed that per minute tens changes, for guaranteeing that its output voltage and frequency are in normal scope, generator need adopt bigger rotor diameter and more number of pole-pairs, has increased great difficulty for design, manufacturing, transportation and the installation etc. of generator.
Therefore, be necessary to study be suitable for the wind energy effective conversion utilize, reliable, control is convenient and the good model wind generating device of power supply quality.
Summary of the invention
Technical problem: the present invention is by proposing a kind of composite permanent magnet brushless wind power generating set, solve that mechanical step-up gear power density in the existing wind power generation plant is low, problems such as mechanical wear and noise, and reduce volume, weight and the manufacturing cost of generator, improve generating efficiency and power factor, improve the quality of power supply.
Technical scheme: the invention discloses a kind of composite permanent magnet brushless wind power generating set, this Blast Furnace Top Gas Recovery Turbine Unit (TRT) comprises wind energy conversion system, birotor permanent magnetic brushless generator, two pwm power converter, filter and transformer; Wherein in the birotor permanent magnetic brushless generator, inwardly be sequentially with permanent magnet low-speed external rotor, static silicon steel ring, permanent magnetism high speed internal rotor, stator respectively from the outer ring; In two pwm power converters, electric capacity is connected in parallel between two connecting lines of PWM rectifier, PWM inverter; Wind energy conversion system directly links to each other with the permanent magnet low-speed external rotor, and the stator winding output connects PWM rectifier input, and the PWM rectifier output end connects PWM inverter input, behind the output parallel filter of PWM inverter by the transformer power supply that is connected to the grid.
Between permanent magnet low-speed external rotor and the static silicon steel ring air gap is arranged, between static silicon steel ring and the permanent magnetism high speed internal rotor air gap is arranged, permanent magnetism high speed internal rotor is connected with fixed part with bearing by rotating shaft, permanent magnet low-speed external rotor and the concentric disalignment of permanent magnetism high speed internal rotor.
The PWM rectifier is formed three-phase commutation bridge by an IGBT, the 2nd IGBT, the 3rd IGBT, the 4th IGBT, the 5th IGBT, the 6th IGBT, and its input connects first inductance, second inductance, the 3rd inductance respectively; The PWM inverter is formed three phase inverter bridge by the 7th IGBT, the 8th IGBT, the 9th IGBT, the tenth IGBT, the 11 IGBT, the 12 IGBT; Electric capacity is DC link filter electric capacity.
Filter connects the 4th inductance after by first resistance, first capacitances in series, connects the 5th inductance after second resistance, second capacitances in series, connects the 6th inductance, parallel three phase after the 3rd resistance, the 3rd capacitances in series.
When the permanent magnet low-speed external rotor with angular velocity omega 1During rotation, through the magnetic field coupling, permanent magnetism high speed internal rotor is with angular speed-ω 2Reverse high speed rotating produces relative motion with motor stator and cuts and send electric energy.ω 1: ω 2Be the speed no-load voltage ratio, equal the ratio of the field pole logarithm of outer, internal rotor.
Two pwm power converters are made up of PWM rectifier, electric capacity and PWM inverter.The PWM rectifier is responsible for the AC energy that motor sends is converted to direct current energy.Electric capacity is DC link filter electric capacity, is the significant part of voltage type PWM converter, and its effect is a filtering dc voltage ripple composition, guarantees net side pwm converter operate as normal.The PWM inverter is converted to AC energy with direct current energy again, and power supply is connected to the grid behind the PWM inverter output end parallel filter.
Under wind action, wind energy conversion system rotation drives the birotor permanent magnetic brushless generator and produces AC energy, and electric energy is connected to two pwm power converters by motor stator winding, subsequently electric energy by filter filtering after through the transformer power supply that is connected to the grid.
Beneficial effect:
(1) saves mechanical step-up gear, do not had mechanical wear, maintenance and the noise problem of gear box, improved device reliability.Improved generator speed simultaneously, reduced the volume of motor, weight and manufacturing cost.
(2) the birotor permanent magnetic brushless AC generator adopts high energy product rare-earth permanent magnet excitation, does not have slip ring and brush, need not the additional power source excitation, have simple in structure, volume little in light weight, power density is high and efficient is high and advantage such as good reliability.
(3) the PWM rectifier has input current, power factor that the low harmonic wave of sineization is provided and is close to 1 and the characteristics of energy two-way flow.
(4) two pwm power translation circuits have the frequency conversion function that is incorporated into the power networks, and the output power factor of may command generator has the reactive power compensation ability, and can suppress humorous wave direction electrical network provides high-quality electric energy.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein have: wind energy conversion system 1, permanent magnet low-speed external rotor 2, static silicon steel ring 3, permanent magnetism high speed internal rotor 4, stator 5, composite permanent-magnetic brushless generator 6, PWM rectifier 7, electric capacity 8, PWM inverter 9, two pwm power converter 10, filter 11, transformer 12.
Fig. 2 is the circuit diagram of two pwm power converters.
Fig. 3 is the circuit diagram of filter.
Embodiment
Be that specific embodiments of the invention further describe below:
The present invention is a kind of composite permanent magnet brushless wind power generating set, and this Blast Furnace Top Gas Recovery Turbine Unit (TRT) comprises wind energy conversion system 1, birotor permanent magnetic brushless generator 6, two pwm power converter 10, filter 11 and transformer 12; Wherein, compound magnetic gear permanent-magnet brushless generator 6 comprises permanent magnet low-speed external rotor 2, static silicon steel ring 3, permanent magnetism high speed internal rotor 4, stator 5; Two pwm power converters 10 comprise PWM rectifier 7, electric capacity 8, PWM inverter 9; Wind energy conversion system 1 directly links to each other with permanent magnet low-speed external rotor 2, stator 5 winding outputs connect PWM rectifier 7 inputs, PWM rectifier 7 output termination PWM inverters 9 inputs, electric capacity 8 is connected in parallel between two power lines between PWM rectifier 7 and the PWM inverter 9, behind output parallel filter 11 inputs of PWM inverter 9 by transformer 12 power supply that is connected to the grid.
As shown in Figure 1, birotor permanent magnetic brushless generator 6 is made up of permanent magnet low-speed external rotor 2, static silicon steel ring 3, permanent magnetism high speed internal rotor 4.Have between low speed external rotor 2 and the static silicon steel ring 3 between air gap, static silicon steel ring 3 and the permanent magnetism high speed internal rotor 4 air gap is arranged, permanent magnetism high speed internal rotor 4 is connected with fixed part with bearing by rotating shaft, permanent magnet low-speed external rotor 2 and permanent magnetism high speed internal rotor 4 concentric disalignments.
In Fig. 1, wind energy conversion system 1 directly links to each other with permanent magnet low-speed external rotor 2.After wind speed reached starting wind velocity, wind energy conversion system 1 drove permanent magnet low-speed external rotor 2 with speed omega 1Rotation.Permanent magnet low-speed external rotor 2 all is equipped with the different high energy product rare-earth permanent magnet of number of pole-pairs with permanent magnetism high speed internal rotor 4, in motor, produce alternating magnetic field, and by static silicon steel ring 3 correction magnetic field properties, permanent magnet low-speed external rotor 2, static silicon steel ring 3, permanent magnetism high speed internal rotor 4 all do not have directly contact.Under the coupling of magnetic field, permanent magnetism high speed internal rotor 4 is with speed-ω 2Reverse rotation produces relative motion with stator 5, and motor stator winding is sent AC energy.Birotor permanent magnetic brushless generator 6 outputs are connected to two pwm power converter 10 inputs.
The used permanent magnet of the present invention can adopt rare earth permanent-magnetic materials such as neodymium iron boron, and permanent magnet both can adopt surface-mount type to be attached to rotor surface and also can adopt and embeddedly be embedded in internal rotor or other modes are installed.
As shown in Figure 2, two pwm power converters 10 are made up of PWM rectifier 7, electric capacity 8, PWM inverter 9.Electric capacity 8 is DC link filter electric capacity, is the significant part of voltage type PWM converter, and its effect is a filtering dc voltage ripple composition, guarantees net side pwm converter operate as normal.
In Fig. 2, PWM rectifier 7 by an IGBT～the 6th IGBT (G1～G6) form three-phase commutation bridge, its input meets the first inductance L a, the second inductance L b, the 3rd inductance L c respectively; (s1～s6) forms three phase inverter bridge to PWM inverter 9 by the 7th IGBT～the 12 IGBT.PWM rectifier 7 replaces traditional diode rectifier circuit, and the AC energy that motor is sent is converted to direct current energy.By the shutoff of opening of each device for power switching in the PWM technology control PWM rectifier 7, can provide the input current of the low harmonic wave of sineization.Adjust input current amplitude and phase place and can adjust power factor, and can realize that bidirectional energy flows.PWM rectifier 7 outputs connect electric capacity 8 and PWM inverter 9 inputs with parallel way.PWM inverter 9 is converted to AC energy with direct current energy, and PWM inverter 9 output termination filters 11 are by 10kV three-phase voltage increasing transformer 12 power supply that is connected to the grid.The whole pair of pwm power converter 10 has the frequency conversion function that is incorporated into the power networks, the output power factor of may command generator under the support of microprocessor, thus had the reactive power compensation ability.And it has harmonic restraining function, can provide high-quality electric energy to electrical network.
In Fig. 3, filter 11 is responsible for filtering noxious harmonic wave, filter is connected into a phase by the 4th inductance L 1, first resistance R 1, first capacitor C 1, the 5th inductance L 2, second resistance R 2, second capacitor C 2 are connected into a phase, the 6th inductance L 3, the 3rd resistance R 3, the 3rd capacitor C 3 are connected into a phase, parallel three phase.
This wind power generation plant is a Variable Speed Wind Power Generator, can change wind energy into electric energy to greatest extent, improves unit operation efficient to reach.According to wind conditions, this device mainly operates in three zones:
(1) power coefficient C pConstant zone
After wind speed reached starting wind velocity, wind speed round reached generator incision rotating speed, and wind turbine generator begins to do generator operation.Control power coefficient C by rotating speed to generator pConstantly rise, when reaching maximal wind-energy usage factor C PmaxAfter, enter C pConstant zone, unit moves in the best condition.Regulate by variable pitch, the regulator generator moment of resistance makes rotating speed follow the wind speed variation, makes tip speed ratio maintain optimum state, realizes maximal wind-energy capture.
(2) invariablenes turning speed zone
Along with the increase of wind speed, unit may ultimately reach and keep limit speed, and the power of the assembling unit increases with the increase of wind speed.
(3) power invariability zone
If wind speed continues to increase, generator and inverter power will continue to increase and reach power limit, for keeping this maximum power, must reduce generator speed.Utilize the characteristics of PWM rectifier energy two-way flow, unnecessary electric energy is discharged the driving generator, wind wheel is braked just can be made generator speed decline.

Claims (4)

1. a composite permanent magnet brushless wind power generating set is characterized in that this Blast Furnace Top Gas Recovery Turbine Unit (TRT) comprises wind energy conversion system (1), birotor permanent magnetic brushless generator (6), two pwm power converter (10), filter (11) and transformer (12); Wherein in birotor permanent magnetic brushless generator (6), inwardly be sequentially with permanent magnet low-speed external rotor (2), static silicon steel ring (3), permanent magnetism high speed internal rotor (4), stator (5) respectively from the outer ring; In two pwm power converters (10), electric capacity (8) is connected in parallel between two connecting lines of PWM rectifier (7), PWM inverter (9); Wind energy conversion system (1) directly links to each other with permanent magnet low-speed external rotor (2), stator (5) winding output connects PWM rectifier (7) input, PWM rectifier (7) output termination PWM inverter (9) input, output parallel filter (11) back of PWM inverter (9) is by transformer (12) power supply that is connected to the grid.
2. composite permanent magnet brushless wind power generating set according to claim 1, it is characterized in that between permanent magnet low-speed external rotor (2) and the static silicon steel ring (3) air gap being arranged, between static silicon steel ring (3) and the permanent magnetism high speed internal rotor (4) air gap is arranged, permanent magnetism high speed internal rotor (4) is connected with fixed part with bearing by rotating shaft, permanent magnet low-speed external rotor (2) and the concentric disalignment of permanent magnetism high speed internal rotor (4).
3. composite permanent magnet brushless wind power generating set according to claim 1, it is characterized in that PWM rectifier (7) forms three-phase commutation bridge by an IGBT (G1), the 2nd IGBT (G2), the 3rd IGBT (G3), the 4th IGBT (G4), the 5th IGBT (G5), the 6th IGBT (G6), its input connects first inductance (La), second inductance (Lb), the 3rd inductance (Lc) respectively; PWM inverter (9) is formed three phase inverter bridge by the 7th IGBT (s1), the 8th IGBT (s2), the 9th IGBT (s3), the tenth IGBT (s4), the 11 IGBT (s5), the 12 IGBT (s6); Electric capacity (8) is DC link filter electric capacity.
4. composite permanent magnet brushless wind power generating set according to claim 1, it is characterized in that connecing the 4th inductance (L1) after filter is by first resistance (R1), first electric capacity (C1) series connection, connect the 5th inductance (L2) after second resistance (R2), second electric capacity (C2) series connection, connect the 6th inductance (L3), parallel three phase after the 3rd resistance (R3), the 3rd electric capacity (C3) series connection.
CN2009101844162A 2009-08-06 2009-08-06 Composite permanent magnet brushless wind power generating set Expired - Fee Related CN101621201B (en)

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Application Number Priority Date Filing Date Title
CN2009101844162A CN101621201B (en) 2009-08-06 2009-08-06 Composite permanent magnet brushless wind power generating set

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Application Number Priority Date Filing Date Title
CN2009101844162A CN101621201B (en) 2009-08-06 2009-08-06 Composite permanent magnet brushless wind power generating set

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CN101621201B true CN101621201B (en) 2011-05-04

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101858309A (en) * 2010-04-27 2010-10-13 东南大学 Fixed-pitch direct-driving wind power generator
CN106532777A (en) * 2016-12-30 2017-03-22 量子光电科技（天津）有限公司 Novel high-voltage DC wind power generator set and group network
CN107359643A (en) * 2017-08-13 2017-11-17 长沙小新新能源科技有限公司 A kind of stator permanent-magnet dual-rotor wind power generation system
CN113364061A (en) * 2021-06-25 2021-09-07 广东电网有限责任公司 Reactive power modulation method, device, terminal and medium for wind power plant alternating current system

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