CN201388064Y - Megawatt variable-speed wind turbine generator system employing polyphase generators and multilevel convertors - Google Patents
Megawatt variable-speed wind turbine generator system employing polyphase generators and multilevel convertors Download PDFInfo
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- CN201388064Y CN201388064Y CN200920151337U CN200920151337U CN201388064Y CN 201388064 Y CN201388064 Y CN 201388064Y CN 200920151337 U CN200920151337 U CN 200920151337U CN 200920151337 U CN200920151337 U CN 200920151337U CN 201388064 Y CN201388064 Y CN 201388064Y
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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
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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
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
A megawatt variable-speed wind turbine generator system employing polyphase generators and multilevel convertors comprises a plurality groups of coaxial generators and a plurality of electric power electronic convertor systems, wherein a main shaft of a blower is connected with a plurality groups of generator shafts, and each generator stator side is connected with an independent convertor system and connects the convertor systems in parallel and/or in series into a power grid to convey electric power to the power grid, so as to complete the conversion from wind power energy to electric energy via mechanical energy. The technology is mainly characterized in that the coaxial generators are adopted to replace a single generator, and each independent generator stator side adopts the respective independent electric power electronic convertor or multiple technologies to realize parallel connection or series connection of the convertors, so as to further realize the megawatt variable-speed wind turbine generator system.
Description
Technical field
The utility model relates to the wind-powered electricity generation field, refers to a kind of MW class speed change wind-powered electricity generation unit that adopts multiphase generator and multi-level converter especially.
Background technology
Wind-powered electricity generation is the clean energy resource that at present has most the business development potentiality, also is one of regenerative resource of giving priority to of China.The mainstream technology scheme of current wind power generation is the speed-changing draught fan technology, and for being incorporated into the power networks of the variable-speed operation of realizing blower fan and wind-powered electricity generation unit, converters is wherein requisite core controller.In the implementation of various speed-changing draught fans, the total power wind-powered electricity generation converter that is installed in the generator unit stator side is one of important aspect that realizes the control of blower fan variable speed constant frequency, this scheme is compared with generator amature side converter scheme and is easier to realize, therefore will satisfy the higher voltage ride-through capability as wind-powered electricity generation unit key equipment under grid failure state, be the technology of important and focus in the research of present high-power wind turbine converter.Because stator side converter scheme must be handled whole generator powers, this causes a lot of difficulty and the higher cost of stator side wind-powered electricity generation converter in design and manufacturing.The particularly present single-machine capacity of wind-powered electricity generation unit has in the world reached 5MW, and at the power grade that further develops more than the 5MW, therefore have higher requirement for the design and the manufacturing of wind-powered electricity generation converter, and the technical scheme of existing monomotor and single converter can not adapt to this specification requirement.
The utility model content
At the problem that prior art exists, the purpose of this utility model is to provide a kind of MW class speed change wind-powered electricity generation unit that adopts multiphase generator and multi-level converter.
For achieving the above object, the utility model adopts the MW class speed change wind-powered electricity generation unit of multiphase generator and multi-level converter, comprise many group integral shaft generators and a plurality of converters system, the main shaft of blower fan links to each other with many groups generator shaft, each generator unit stator side connects independently changer system, and with in parallel between each changer system and/or series connection, generator unit stator is connected to the grid, transmit electric power to electrical network, finish the conversion of wind energy-mechanical energy-electric energy.
Further, described generator is a polyphase synchronous generator.
Further, described changer system comprises and does not control rectifier bridge, chopper and combining inverter.
Further, described combining inverter is a doubleization PWM inverter, the form that is used for the DC side energy conversion is become to satisfy the electrical network connection request passes to electrical network, when keeping dc voltage constant, make the AC side phase current approach sine, phase current and phase voltage homophase, power factor approaches 1, is transported to the harmonic wave and the idle content of electrical network with minimizing.
Further, described changer system main circuit comprises that interphase reactor, filter and step-up transformer are not exported in control rectifier, rectification output capacitor group, the triple BOOST of boosting converter, brake unit, inversion side filtering capacitor, dual combining inverter, inversion to generator side filter, six mutually.
Further, described changer system control circuit comprises power supply and reset circuit, AD reference circuit, D/A output circuit, PWM output drives and IGBT failure detector circuit and analog quantity input modulate circuit.
Further, described power supply and reset circuit can be exported reset signal simultaneously by TPS70351 chip output 3.3V and two kinds of voltages of 1.8V.
Further, the AD sampling reference circuit that described AD reference circuit carries by 2812 chips, described D/A output circuit adopts parallel port 16 DA chips AD574, and described analog quantity input modulate circuit is made of differential amplifier INA114 and amplifier INA2137.
Wind-powered electricity generation unit of the present utility model adopts multiphase generator and multi-level converter to realize the technology of high-power speed change wind-powered electricity generation unit, the main feature of this technology is that the many groups of employing integral shaft generators replace single generator, every discrete generator unit stator side employing independently parallel connection (or series connection) combination of converters or employing multiple technology realization converter separately.The major advantage of this technology: the power grade of (1) separate unit generator reduces relatively, and the power of whole blower fan is shared by many generators; (2) generator can adopt easy manufacturing and cage type induction motor cheaply, and design and manufacturing cycle lack; If the employing permagnetic synchronous motor, power grade is less, the then also relative reduction with manufacture difficulty of the design of motor; (3) capacity of stator side converters reduces, and can realize the parallel connection or the series multiplexization of converter easily; (4) if separate unit generator or converter break down, then whole system can subtract power and continue to move or enable redundant motor or converter.Although in the monomotor wind power system, converters also can adopt the realization in parallel of the converter of a plurality of same structures, and this need isolate every converter; And multiphase generator prescription case itself provides many groups of separate power supplys, does not need extra isolation.(5) owing to can adapt to the demand of the blower fan of various power grades in the multicomputer system by the number that increases and reduce the separate unit generator, therefore for the manufacturer of generator and converter, do not need to provide too many power grade, this helps realizing the optimal design of generator and converter.(6) this technology can fully adapt to the market expectation and the existing technical capability of China of China high-power wind turbine unit requirement production domesticization, and the high-power wind turbine unit is constructed in the combination of the smaller power unit by adopting domestic maturation.
Description of drawings
Fig. 1 is not controlled rectification for the utility model and is met BOOST and add IGBT inversion total power changer system schematic diagram;
Fig. 2 is the circuit diagram of the utility model MW class speed change wind-powered electricity generation unit;
Fig. 3 is embodiment apoplexy group of motors circuit theory diagrams;
Many squirrel-cage of Fig. 4 induction generator group speed change wind power system principle schematic;
Many magneto alternators of Fig. 5 group speed change wind power system principle schematic;
The generating set of Fig. 6 converter parallel connection;
The generating set of Fig. 7 generator side converter series connection;
Fig. 8 changer system hardware control system block diagram.
Embodiment
The utility model is to realize the variable-speed operation of high-power blower and be incorporated into the power networks by the multiple technology that adopts many generators and converter with the core of multiphase generator wind-powered electricity generation transformation system, is the new technology of high power level speed change wind-powered electricity generation unit.
Embodiment 1:
Shown in Fig. 4,5,6, the utility model wind-powered electricity generation unit will be organized generator coaxle more and link to each other, and the stator side of each generator is connected with converter, and each converter carries out the parallel connection back in grid side and is connected to electrical network by step-up transformer.Wherein, generator can adopt easy manufacturing and cage type induction motor cheaply, and design and manufacturing cycle lack.Perhaps adopt permagnetic synchronous motor, power grade is less, the then also relative reduction with manufacture difficulty of the design of motor.
As illustrated in fig. 1 and 2, the utility model wind-powered electricity generation unit comprises blower fan, multiphase generator and multi-level converter, wherein, the main circuit of converter comprises that interphase reactor, filter and step-up transformer are not exported in control rectifier, rectification output capacitor group, the triple BOOST of boosting converter, brake unit, inversion side filtering capacitor, dual combining inverter, inversion to generator side filter, six mutually.Do not control and add DC/DC Boost link of boosting behind the diode rectifier bridge, obtain the stable PWM voltage source inverter type topological structure of dc voltage shown in Figure 1.By increasing this link, keep good operation characteristic thereby can solve the stable PWM inverter that makes that guarantees DC bus-bar voltage when the less generator output voltage of wind-force hangs down.It improves the inverter DC bus-bar voltage and is stabilized in suitable scope by the Boost link of boosting, and makes the modulation depth scope of inverter good, improves operational efficiency, reduces loss.Simultaneously, the Boost circuit can also carry out power factor correction to the magneto alternator outlet side.Owing to do not control the nonlinear characteristic of rectifier bridge, the distortion of rectifier bridge input side current characteristics is very serious, and harmonic content is bigger, and the generator power factor is reduced, and generator torque vibrates.Can pass through power factor correction technology (PFC), change the duty ratio of switching device, make the generator output current keep sinusoidal and also keep synchronous with output voltage.Straight-alternation in the main circuit changes part and adopts doubleization PWM inverter, the form that is used for the DC side energy conversion is become to satisfy the electrical network connection request passes to electrical network, when keeping dc voltage constant, make the AC side phase current approach sine, phase current and phase voltage homophase, power factor approaches 1, is transported to the harmonic wave and the idle content of electrical network with minimizing.It is to realize the parallel current-sharing of circuit that this inverter adopts the purpose one of doubleization, improves power grade, the 2nd, reduce the harmonic content in the ac output current, and satisfy the requirement of electrical network to harmonic wave.
As shown in Figure 3, the high-power wind turbine changer system constitutes by not controlling rectifier bridge, chopper, combining inverter.Rectifier side power supply three-phase 380V, inverter side power supply three-phase 690V, closed power distribution cabinet 1,2 and 3, closed main circuit breaker, three-phase 380V voltage is received the input of not controlling rectifier bridge, three-phase 690V voltage is received the output of combining inverter, and control cabinet startup work then sends out working pulse for triple choppers and double inverter; With the operating current of the given chopper of operator, observe waveforms such as triple electric current of chopper, middle dc voltage, alternating current whether normal.The result: when being 450A (semi-load), 900A (being fully loaded with) with the given rectification state alternating current of operator peak value, the waveform of middle dc voltage, alternating current is along with power increases, and the current waveform quality is become better and better.When the given rectification state alternating current of operator peak value was 900A, gross power reached 1499kW.Relatively get the result wherein according to signal:
Passage 1-1/2 middle dc voltage V
DC+(100V/div).
Passage 2-690V side B phase line voltage (200V/div).
Passage 3-combining inverter 1 inductive current (500A/div).
Passage 4-combining inverter 2 inductive currents (500A/div).
As shown in Figure 8, the core control of the utility model generating set is realized jointly by master control system and PWM unsteady flow control system, wherein the effect of master control system is the control that realizes complete machine, comprise measuring wind speed, power calculation, the instruction of PWM converter system is given, speed-changing oar-changing control, the control of all contactors etc., the effect of unsteady flow control system is the given signal that provides according to master control borad, motor side inverter in converter system respectively, brake unit and combining inverter send corresponding control impuls, the energy that makes generator is by rectification, with send into electrical network after the inversion, when keeping middle dc voltage constant, make the inverter output current reach the electrical network connection request.
Hardware control system DSP peripheral circuit is become by following several parts:
(1) power supply and reset circuit, this function realizes that by the TPS70351 chip this chip can be exported 3.3V and two kinds of voltages of 1.8V, satisfies the needs of DSP power supply.Simultaneously reset signal can be exported, and moving position button can be taken over.
(2) AD reference circuit, TMS320F2812 chip internal carry the reference circuit of AD sampling, can satisfy the needs that AD gathers, and the signal that utilizes voltage source and amplifier chip to produce 1V and 2V offers DSP, improve the precision that AD gathers.Because the TMS320F2812 chip can only be accepted the voltage signal of 0-3V, and signal regulating panel to give the signal of DSP control board be bipolar signal, so give DSP again after need raising 1.5V to signal.Just can utilize the 1V and the 2V signal of DSP output to give an amplifier chip, ambipolar analog quantity input is adjusted between the 0-3V.
(3) D/A output circuit adopts parallel port 16 DA chips AD574.
(4) PWM output drives and the IGBT failure detector circuit.
(5) analog quantity input modulate circuit is made up of differential amplifier INA114 and amplifier INA2137.
Embodiment 2:
Shown in Fig. 4,5,7, the utility model wind-powered electricity generation unit will be organized generator coaxle more and link to each other, the stator side of each generator is connected with independently converter, adopt series connection to improve DC bus-bar voltage between each converter, and grid side converter (inverter) is only with one, and the generator unit stator side is connected to the grid and transmits electric power to electrical network the most at last.Generator also can adopt easy manufacturing and cage type induction motor cheaply, and design and manufacturing cycle lack.Perhaps adopt permagnetic synchronous motor, power grade is less, the then also relative reduction with manufacture difficulty of the design of motor.Identical among other parts and the embodiment 1.
Although above embodiment of the present utility model is described in detail and illustrates by example, but what should indicate is, those skilled in the art can carry out various changes and modification to above-mentioned execution mode, but these do not break away from the scope that spirit of the present utility model and claim are put down in writing.
Claims (8)
1. MW class speed change wind-powered electricity generation unit that adopts multiphase generator and multi-level converter, comprise many group integral shaft generators and a plurality of converters system, the main shaft of blower fan links to each other with many groups generator shaft, it is characterized in that, each generator unit stator side connects independently changer system, and in parallel between each changer system and/or series connection be connected to the grid, transmit electric power to electrical network, finish the conversion of wind energy-mechanical energy-electric energy.
2. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 1 and multi-level converter is characterized in that described generator is a multiphase generator, as squirrel-cage induction generator or magneto alternator.
3. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 1 and multi-level converter is characterized in that, described changer system comprises does not control rectifier bridge, chopper and combining inverter.
4. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 3 and multi-level converter, it is characterized in that, described combining inverter is a doubleization PWM inverter, the form that is used for the DC side energy conversion is become to satisfy the electrical network connection request passes to electrical network, when keeping dc voltage constant, make the AC side phase current approach sine, phase current and phase voltage homophase, power factor approaches 1, is transported to the harmonic wave and the idle content of electrical network with minimizing.
5. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 1 and multi-level converter, it is characterized in that, described changer system main circuit comprises that interphase reactor, filter and step-up transformer are not exported in control rectifier, rectification output capacitor group, the triple BOOST of boosting converter, brake unit, inversion side filtering capacitor, dual combining inverter, inversion to generator side filter, six mutually.
6. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 1 and multi-level converter, it is characterized in that described changer system control circuit comprises power supply and reset circuit, AD reference circuit, D/A output circuit, PWM output drives and IGBT failure detector circuit and analog quantity input modulate circuit.
7. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 6 and multi-level converter is characterized in that, described power supply and reset circuit can be exported reset signal simultaneously by TPS70351 chip output 3.3V and two kinds of voltages of 1.8V.
8. the MW class speed change wind-powered electricity generation unit of employing multiphase generator as claimed in claim 6 and multi-level converter, it is characterized in that, the AD sampling reference circuit that described AD reference circuit carries by 2812 chips, described D/A output circuit adopts parallel port 16 DA chips AD574, and described analog quantity input modulate circuit is made of differential amplifier INA114 and amplifier INA2137.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200920151337U CN201388064Y (en) | 2009-04-16 | 2009-04-16 | Megawatt variable-speed wind turbine generator system employing polyphase generators and multilevel convertors |
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| CN200920151337U CN201388064Y (en) | 2009-04-16 | 2009-04-16 | Megawatt variable-speed wind turbine generator system employing polyphase generators and multilevel convertors |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130182465A1 (en) * | 2012-01-17 | 2013-07-18 | Delta Electronics (Shanghai) Co., Ltd. | Wind power converter structure and wind power generation system including the same |
| CN104541345A (en) * | 2012-08-28 | 2015-04-22 | 株式会社日立制作所 | Power conversion device |
| CN105932714A (en) * | 2016-06-16 | 2016-09-07 | 三重型能源装备有限公司 | Dual-motor wind power generator grid-connection apparatus, wind power generator and grid-connection control method |
| CN106356889A (en) * | 2016-09-29 | 2017-01-25 | 李卓洋 | Permanent magnet wind power generator set |
| CN106843025A (en) * | 2015-12-07 | 2017-06-13 | 上海新跃仪表厂 | A kind of servo-drive system drive circuit control method |
| CN107870269A (en) * | 2016-09-26 | 2018-04-03 | 维谛技术有限公司 | A kind of generating set analogue means |
| CN108448909A (en) * | 2018-03-30 | 2018-08-24 | 北京天诚同创电气有限公司 | Modularized current transformer and its control method, wind power generating set |
| CN108879773A (en) * | 2018-07-19 | 2018-11-23 | 湖南大学 | Six phase wind-driven generator direct current grid connected structures of one kind and its control method |
| CN109075623A (en) * | 2016-03-10 | 2018-12-21 | 莱特拉姆有限责任公司 | Linear electric machine stator with integral type feed(er) reactor |
| GB2577605A (en) * | 2018-08-03 | 2020-04-01 | Hamilton Sundstrand Corp | Electric generating system with an interleaved DC-DC Converter |
| US10914283B2 (en) | 2016-05-20 | 2021-02-09 | Vestas Wind Systems A/S | Electrical recombination |
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- 2009-04-16 CN CN200920151337U patent/CN201388064Y/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8823190B2 (en) * | 2012-01-17 | 2014-09-02 | Delta Electronics (Shanghai) Co., Ltd. | Wind power converter structure and wind power generation system including the same |
| US20130182465A1 (en) * | 2012-01-17 | 2013-07-18 | Delta Electronics (Shanghai) Co., Ltd. | Wind power converter structure and wind power generation system including the same |
| CN104541345A (en) * | 2012-08-28 | 2015-04-22 | 株式会社日立制作所 | Power conversion device |
| CN104541345B (en) * | 2012-08-28 | 2016-11-16 | 株式会社日立制作所 | Power inverter |
| CN106843025A (en) * | 2015-12-07 | 2017-06-13 | 上海新跃仪表厂 | A kind of servo-drive system drive circuit control method |
| CN109075623A (en) * | 2016-03-10 | 2018-12-21 | 莱特拉姆有限责任公司 | Linear electric machine stator with integral type feed(er) reactor |
| US10914283B2 (en) | 2016-05-20 | 2021-02-09 | Vestas Wind Systems A/S | Electrical recombination |
| CN105932714A (en) * | 2016-06-16 | 2016-09-07 | 三重型能源装备有限公司 | Dual-motor wind power generator grid-connection apparatus, wind power generator and grid-connection control method |
| CN105932714B (en) * | 2016-06-16 | 2018-11-13 | 三一重型能源装备有限公司 | Bi-motor wind-driven generator grid-connecting apparatus, wind-driven generator and grid-connected control method |
| CN107870269A (en) * | 2016-09-26 | 2018-04-03 | 维谛技术有限公司 | A kind of generating set analogue means |
| CN106356889A (en) * | 2016-09-29 | 2017-01-25 | 李卓洋 | Permanent magnet wind power generator set |
| CN108448909A (en) * | 2018-03-30 | 2018-08-24 | 北京天诚同创电气有限公司 | Modularized current transformer and its control method, wind power generating set |
| CN108879773A (en) * | 2018-07-19 | 2018-11-23 | 湖南大学 | Six phase wind-driven generator direct current grid connected structures of one kind and its control method |
| CN108879773B (en) * | 2018-07-19 | 2021-04-27 | 湖南大学 | Control method of six-phase wind driven generator direct-current grid-connected structure |
| GB2577605A (en) * | 2018-08-03 | 2020-04-01 | Hamilton Sundstrand Corp | Electric generating system with an interleaved DC-DC Converter |
| GB2577605B (en) * | 2018-08-03 | 2022-07-06 | Hamilton Sundstrand Corp | Electric generating system with an interleaved DC-DC Converter |
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| 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: 20100120 Termination date: 20130416 |