CN102005935A - Great-power wind-power integration convertor suitable for cage asynchronous generator - Google Patents
Great-power wind-power integration convertor suitable for cage asynchronous generator Download PDFInfo
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- CN102005935A CN102005935A CN2010105631191A CN201010563119A CN102005935A CN 102005935 A CN102005935 A CN 102005935A CN 2010105631191 A CN2010105631191 A CN 2010105631191A CN 201010563119 A CN201010563119 A CN 201010563119A CN 102005935 A CN102005935 A CN 102005935A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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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
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- Y02E10/76—Power conversion electric or electronic aspects
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention relates to a great-power wind-power integration convertor suitable for a cage asynchronous generator, belonging to the technical field of new energy of wind and power. The invention adopts the technical scheme that a rectifying unit comprises at least one three-phase uncontrolled diode rectifier unit or a plurality of three-phase uncontrolled diode rectifier units connected in parallel, a boost chopper unit comprises at least one boost chopper unit or a plurality of boost chopper units connected in parallel, an inverter unit comprises at least one three-phase full-control inverter unit or a plurality of three-phase full-control inverter units connected in parallel, and a motor soft-start excitation unit comprises at least one three-phase soft-start excitation unit or a plurality of three-phase soft-start excitation units connected in parallel. By applying the low-cost cage asynchronous generator to wind-powered generation, the whole unit cost is greatly decreased, the control structure is simplified, and the stability and the suitability of the unit operation are enhanced.
Description
Technical field:
The present invention relates to a kind of high-power wind turbine grid-connected converter that is applicable to cage type asynchronous generator, particularly cage type asynchronous generator belongs to the wind-powered electricity generation technical field of new energies with megawatt-grade high-power wind-electricity integration current transformer.
Background technology:
In recent years, development of human society has been stepped into the new period of develop rapidly, and global economic integration trend is obvious day by day.Information, new forms of energy, new material three big pillar industries become the important foundation stone of the new civilization of human trend of 21st century, and new forms of energy industry wherein is quick to economy, sustainable development plays crucial effects.Wind generating technology is comparative maturity in the present new energy technology, the technical approach that melts clockwork spring spare and commercialized development prospect on the largest scale; have occupation of land less, advantage such as pollution-free, construction period is short, the installation scale is flexible; be subjected to the extensive concern of countries in the world, on the All Around The World electricity market, present powerful growth momentum.In order to promote the development of grid type wind turbine generator, explicitly call in " the medium-term and long-term development plan of regenerative resource " that National Development and Reform Committee organizes to set up, the wind-powered electricity generation installed capacity of the year two thousand twenty whole nation reaches 30,000,000 kilowatts.We know that the grid type wind generator system mainly comprises direct-drive wind power system and two kinds of forms of non-direct drive formula wind generator system.Wherein, AC excitation double-fed asynchronous wind generator system of variable speed constant frequency and multipole permanent magnet direct-drive wind generator system are most typical representatives in these two kinds of wind generator systems, it also is the most promising wind power generation scheme, having become at present the preferred option of megawatt-level wind unit, also is the main direction that China's wind power equipment manufacturing industry marches megawatt-level wind market simultaneously.
In the non-direct drive formula wind generator system, wind wheel is connected with generator by step-up gear, is connected to the grid by grid-connected converter then.And in the direct-drive wind power system, wind wheel directly is connected with generator, is connected to the grid by current transformer then.Obviously, direct-drive wind power system is compared with non-direct drive formula wind generator system, saved step-up gear, so not only reduced the volume and weight of wind turbine generator, and saved line service to gear box, reduced the noise of wind power system, multiple advantage such as high efficiency when having improved unit durability and low wind speed; So direct-drive wind power system has become the development trend of modern wind electricity generation system, and as the quality of the grid-connected converter performance of its core component that is incorporated into the power networks the normal operation of whole system is played crucial effects, so the research of direct-drive type grid-connected converter becomes the research focus of wind-powered electricity generation sciemtifec and technical sphere.
The power grade of the grid-connected converter of direct-drive aerogenerator group and generating set are suitable substantially, and the electric energy that generator sends all is converted to the alternating current feed-in electrical network of frequency, voltage constant by current transformer; By the control to motor side current transformer electric current, the electromagnetic torque of control generator makes it to realize maximum power output.Compare with non-direct drive formula wind generator system, current transformer is between generating set and electrical network, realized the isolation of generating set and electrical network, coupled problem between rotating speed and the mains frequency has obtained good solution, also avoided to a certain extent because of power network fluctuation to generating set stable operation adverse effect, simultaneously, also alleviate and to impact, electric network reliability and fail safe behind the guarantee wind-powered electricity generation set grid-connection electrical network.Compare with double-fed unit (the current transformer capacity is generally the rated power of 1/2～1/3 wind-powered electricity generation unit), the easier realization low-voltage of full power convertor such as passes through at function, the easier requirement of satisfying electrical network to the wind-electricity integration increasingly stringent.
At present, the generator that adopts in the direct drive wind power unit mostly is magneto alternator greatly, and Fig. 1 is the structure chart of typical permanent magnet direct-drive formula variable-speed constant-frequency wind power generation system, comprises the two back-to-back PWM current transformers of magneto alternator and total power.Though, in recent years along with the improving constantly of permanent magnetic material performance, the decline of price, the price of permagnetic synchronous motor reduces greatly, becomes gradually and is accepted by masses, owing to the limitation of permanent magnetic material itself; Particularly, under conditions such as high temperature, vibrations, the magnetic property of permanent magnet can degenerate, and has the danger of loss of excitation; The rare earth material or the difference of production technology also can make the magnetic property of permanent magnet have very big difference, and this performance and life-span to magneto alternator is all very unfavorable.Life problems is its major reason in the application in wind-powered electricity generation field of restriction, because of present designed life of wind-powered electricity generation unit is 20 years substantially, and just shows the reduction of magnet steel magnetic substantially in the use of magneto at present after several years.Therefore utilizing cage type asynchronous generator, directly drive ring generator and replace magneto alternator, is a kind of technical scheme of dealing with problems.For the cage type asynchronous generator of grid type, in general, needing increases other magnetizer, and exciting curent is 20%～30% of a rated current.Be that excitatory required reactive power just reaches 20%～30% of generator capacity; So, after asynchronous generator and the electrical network parallel running, must add reactive power compensator, to replenish the reduction of generator and power factor of electric network.In wind generator system, when wind speed changed, cage type asynchronous generator can pass through Shunt Capacitor Unit, and idle exciting curent is provided.Regulate the size of magnetizing capacitance value, can reach under different wind speed, the requirement of in parallel different capacitances; The electric capacity of correspondence was big when rotating speed was low, and the electric capacity of correspondence was little when rotating speed was high.
Summary of the invention:
The object of the invention provides a kind of high-power wind turbine grid-connected converter that is applicable to cage type asynchronous generator, circuit structure is simple, reduce the cost of wind power equipment, solve the problems referred to above that exist in the background technology, solved the excitatory of cage type asynchronous generator and reactive power compensation problem simultaneously.
Technical scheme of the present invention is:
A kind of high-power wind turbine grid-connected converter that is applicable to cage type asynchronous generator, it comprises rectification unit, boost chopper unit, inversion unit, the excitatory unit of soft starter for motor, net side three-phase reactive-load compensation capacitor switching unit, between each unit successively coupling connect, its special feature is: described rectification unit does not control by at least one three-phase that the diode rectification unit constitutes or a plurality of three-phase is not controlled the diode rectification unit and is connected in parallel and constitutes; Described boost chopper unit is made of at least one boost chopper unit or a plurality of boost chopper unit is connected in parallel constitutes; Described inversion unit is made of at least one three-phase fully-controlled inversion unit or a plurality of three-phase fully-controlled inversion unit is connected in parallel constitutes; The excitatory unit of described soft starter for motor is made of at least one excitatory unit of three-phase soft start or the excitatory unit of a plurality of three-phase soft starts is connected in parallel constitutes; Described three-phase reactive power compensation unit is made of at least one three-phase reactive power compensation unit or a plurality of three-phase reactive power compensations unit is connected in parallel constitutes.
Wind energy conversion system, cage type asynchronous generator connect rectification unit, rectification unit connects boost chopper unit, boost chopper unit connects inversion unit, inversion unit connects excitatory unit of soft starter for motor and net side three-phase reactive power compensation unit, wherein switching is realized by bidirectional thyristor SCR in excitatory unit of soft starter for motor and three-phase reactive power compensation unit, finishes translation function by change over switch; The inversion unit end connects the transformer that is incorporated into the power networks, and the transformer that is incorporated into the power networks connects common frequency power network; The stator terminal that the excitatory unit of soft starter for motor the is connected to cage type asynchronous generator soft start and excitatory that is incorporated into the power networks is finished generating pusher side filter function simultaneously.
Earlier with one group in twos of six diode, then two devices in every group are joined end to end into a phase brachium pontis, at last the three-phase brachium pontis is composed in parallel rectification unit; The present invention has a plurality of rectification units in forming, the two ends parallel connection of a plurality of brachium pontis.
Boost chopper unit is: inductance and diode are connected, connect a device for power switching at its node place then, at last at the terminal capacitor in parallel of branch road; Boost chopper unit is made of a plurality of boost chopper unit, with each boost chopper series connection.
Inversion unit is: with one group in twos of six device for power switching, two devices in every group are joined end to end form a phase brachium pontis then, and then the three-phase brachium pontis is composed in parallel the three-phase inversion unit, last diode is connected in parallel on each device for power switching.
The excitatory unit of soft starter for motor is: with device for power switching inverse parallel in twos, capacity cell connects by switch then; The excitatory unit of soft starter for motor can be made of the excitatory unit of a plurality of soft starter for motor, with the excitatory unit parallel connection of each motor.
Net side three-phase reactive power compensation unit is: with device for power switching inverse parallel in twos, capacity cell connects by switch then; Net side three-phase reactive power compensation unit can be made of a plurality of net side three-phase reactive power compensations unit, and each net side three-phase reactive power compensation unit parallel connection is got final product.
The switching of excitatory unit of soft starter for motor and net side three-phase reactive power compensation unit can realize by change over switch, but be not limited to change over switch.
The present invention can be applicable to directly-driving wind power generation system, but is not limited to directly-driving wind power generation system.
The device for power switching that main circuit adopts among the present invention can be the IGCT(integrated gate commutated thyristor), but be not limited to IGCT; The excitatory cell capacitance fling-cut switch of soft starter for motor device can adopt thyristor (SCR), but is not limited to thyristor (SCR).
When the present invention works, because asynchronous generator has only when rotating speed is higher than its synchronous speed just to the electrical network feed; During startup, wind wheel drives the wind-driven generator rotating speed and rises, and rotating speed reaches or during near synchronous speed, at first the excitatory unit of net side soft start puts into operation, for asynchronous machine is set up exciting curent, after exciting curent is set up, by magnetizing capacitance device group C
F1Keep the excitation of asynchronous generator, the excitatory and network process of soft start is finished capacitor group C
F1Enter the excitatory stage of generator, have generating pusher side filter function simultaneously concurrently; Two-way SCR group switched to the reactive power compensation mode and moves opening-closing capacitor bank C after startup was incorporated into the power networks
F2, for the asynchronous generating unit provides reactive power compensation; So far, the whole generating unit starting, excitatory, be incorporated into the power networks, the reactive power compensation process finishes, and enters stable operation.
Because the wind speed place is in constantly changing, the alternating current that wind energy conversion system drive wind-driven generator output three-phase frequency and amplitude all change enters rectification unit behind the three-phase filter capacitor unit through the generating pusher side.The direct current that the AC rectification that rectification unit all changes three-phase amplitude frequency becomes the amplitude of many pulse waves to change.Direct current becomes the DC bus-bar voltage of amplitude stability after boost chopper unit, then DC bus-bar voltage feed-in inversion unit.Inversion unit changes direct current and line voltage frequency homophase alternating current together under the control of control system, and transformer is connected to the grid through being incorporated into the power networks.Because the existence of boost chopper unit even under lower wind speed, also can guarantee the stable of DC bus-bar voltage.Simultaneously, when blower fan brings into operation, the excitatory unit of soft starter for motor to generator carry out excitatory after, by suitable control strategy, the trigger impulse of controlling two-way SCR quits work it or according to change of wind velocity, carries out real-time excitatory control.
The invention has the beneficial effects as follows: circuit structure is simple, squirrel cage induction motor with low cost is applied in the wind power generation, greatly reduces the cost of whole unit; Especially the excitatory unit of soft starter for motor is integrated in the current transformer, taken into account the filtering of generating pusher side, simultaneously that asynchronous generator is necessary reactive power compensation unit and the ingenious fusion in the excitatory unit of soft start (can pass through change over switch), when having reduced grid-connected current, finished the task of reactive power compensation, both simplify control structure, strengthened the stability and the adaptability of unit again.The modularized circuit that rectification unit in the circuit, boost chopper unit, inversion unit, the excitatory unit of soft starter for motor, reactive power compensation unit all adopt, this structure is on the basis of the switching device of equal switching voltage current stress, higher power grade can be realized, and the seriation of product can be realized more easily.
Product circuit of the present invention is simple in structure, not only greatly reduce the cost of wind power equipment, and can improve China and make the status and the influence power in field at world's wind power equipment, being the outlet of China's wind power equipment, solid foundation has been established in the status that is lifted on world's wind-power market.
Description of drawings:
Fig. 1 is a typical permanent magnet direct-drive formula variable-speed constant-frequency wind power generation system schematic diagram in the background technology;
Fig. 2 is a schematic diagram of the present invention;
Among the figure: wind energy conversion system 1, magneto alternator 2, electrical network 3, cage type asynchronous generator 4, transformer 5 is incorporated into the power networks.
Embodiment:
Below in conjunction with accompanying drawing, the invention will be further described by embodiment.
With reference to accompanying drawing 2, in an embodiment, the present invention is between wind energy conversion system 1, the cage type asynchronous generator 4 of MW class and the transformer 5 that is incorporated into the power networks, electrical network 3.The present invention includes: rectifier unit, boost chopper unit, inversion unit, the excitatory unit C of soft starter for motor
F1(having net side filter function concurrently), net side three-phase reactive compensation switching capacitor unit C
F2Wind energy conversion system 1, cage type asynchronous generator 4 connect rectification unit, rectification unit connects boost chopper unit, boost chopper unit connects inversion unit, and inversion unit connects the excitatory unit of soft starter for motor and net side three-phase reactive power compensation unit, the wherein excitatory unit C of soft starter for motor
F1With three-phase reactive-load compensation capacitor C
F2Realize switching by two-way SCR, finish translation function by change over switch.The inversion unit end connects the transformer 5 that is incorporated into the power networks, and the transformer 5 that is incorporated into the power networks connects common frequency power network 3.The stator terminal that the excitatory unit of soft starter for motor is connected to cage type asynchronous generator 4 soft start and excitatory that is incorporated into the power networks is finished generating pusher side filter function simultaneously.
Rectification unit is to be made of the uncontrollable diode rectifier of three-phase, and it comprises six diode (D
11～D
16).Boost chopper unit is by inductance component L
21, device for power switching V
21, diode D
21, capacitor C
21Form.Inversion unit is by device for power switching (V
31～V
36), fly-wheel diode (D
31～D
36) constitute.The excitatory unit of soft starter for motor is by bidirectional thyristor (SCR), capacitor group C
F1Constitute.
Embodiment mainly was divided into for two steps:
1. make up each unit link, comprise rectification unit, boost chopper unit, inversion unit, the excitatory unit of soft starter for motor and reactive power compensation unit.
At first, make up rectification unit.Earlier with six diode ((D
11～D
16) one group in twos, be respectively D
11And D
14, D
13And D
16, D
15And D
12, two devices in every group are joined end to end form a phase brachium pontis then, at last the three-phase brachium pontis is composed in parallel the three phase rectifier unit.If a plurality of rectification units are arranged, the parallel connection of the two ends of a plurality of brachium pontis is got final product.
Secondly, make up boost chopper unit.With inductance L
21With diode D
21Connect, then a device for power switching V in parallel at its node place
21, at last at L
21-D
21A capacitor C terminal in parallel of branch road
21If boost chopper unit is to be made of a plurality of boost chopper unit, only need single boost chopper unit parallel connection is got final product.
Once more, make up inversion unit.With six device for power switching (V
31～V
36) one group in twos, be respectively V
31And V
34, V
33And V
36, V
35And V
32, two devices in every group are joined end to end form a phase brachium pontis then, and then the three-phase brachium pontis is composed in parallel the three-phase inversion unit, at last with diode (D
31～D
36) be connected in parallel on respectively on each device for power switching.If inversion unit is to be made of a plurality of inversion units, only need single inversion unit parallel connection is got final product.
At last, make up excitatory unit of soft starter for motor and reactive power compensation unit.With six device for power switching (V
T1～V
T6) one group in twos, be respectively V
T1And V
T2, V
T3And V
T4, V
T5And V
T6, then two devices in every group are joined end to end and connect and form a phase, and then the three-phase brachium pontis is composed in parallel the three-phase inversion unit, soft start magnetizing capacitance device group C
F1With capacitor group C after the reactive power compensation
F2Contact K by change over switch is connected with bidirectional thyristor (SCR) with contact M respectively.If the excitatory unit of soft start is to be made of a plurality of excitatory unit, only single excitatory unit parallel connection need be got final product, if the reactive power compensation unit is to be made of a plurality of reactive power compensations unit, only need the parallel connection of single reactive power compensation unit is got final product.
2. cage type asynchronous generator is connected to rectifier unit, then rectification unit, boost chopper unit are linked in sequence, inversion unit is attempted by on the boost chopper unit output then, last excitatory unit of soft starter for motor and reactive power compensation unit are connected between inverter and the electrical network, the excitatory unit of soft starter for motor then is connected to the motor stator end and provides required exciting curent to motor, capacitor group C after excitatory the finishing
F1Can also realize filter function, the reactive power compensation unit is used for the idle landing of compensation network.
Claims (9)
1. high-power wind turbine grid-connected converter that is applicable to cage type asynchronous generator, it comprises rectification unit, boost chopper unit, inversion unit, the excitatory unit of soft starter for motor, net side three-phase reactive-load compensation capacitor switching unit, between each unit successively coupling connect, it is characterized in that: described rectification unit does not control by at least one three-phase that the diode rectification unit constitutes or a plurality of three-phase is not controlled the diode rectification unit and is connected in parallel and constitutes; Described boost chopper unit is made of at least one boost chopper unit or a plurality of boost chopper unit is connected in parallel constitutes; Described inversion unit is made of at least one three-phase fully-controlled inversion unit or a plurality of three-phase fully-controlled inversion unit is connected in parallel constitutes; The excitatory unit of described soft starter for motor is made of at least one excitatory unit of three-phase soft start or the excitatory unit of a plurality of three-phase soft starts is connected in parallel constitutes; Described three-phase reactive power compensation unit is made of at least one three-phase reactive power compensation unit or a plurality of three-phase reactive power compensations unit is connected in parallel constitutes.
2. the high-power wind turbine grid-connected converter that be applicable to cage type asynchronous generator according to claim 1, it is characterized in that wind energy conversion system, cage type asynchronous generator connect rectification unit, rectification unit connects boost chopper unit, boost chopper unit connects inversion unit, inversion unit connects excitatory unit of soft starter for motor and net side three-phase reactive power compensation unit, wherein switching is realized by bidirectional thyristor in excitatory unit of soft starter for motor and three-phase reactive power compensation unit, finishes translation function by change over switch; The inversion unit end connects the transformer that is incorporated into the power networks, and the transformer that is incorporated into the power networks connects common frequency power network; The stator terminal that the excitatory unit of soft starter for motor the is connected to cage type asynchronous generator soft start and excitatory that is incorporated into the power networks is finished generating pusher side filter function simultaneously.
3. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that earlier one group in twos of six diode, then two devices in every group are joined end to end into a phase brachium pontis, at last the three-phase brachium pontis is composed in parallel rectification unit; The present invention has a plurality of rectification units in forming, the two ends parallel connection of a plurality of brachium pontis.
4. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that boost chopper unit is: inductance and diode are connected, connect a device for power switching at its node place then, at last at the terminal capacitor in parallel of branch road; Boost chopper unit is made of a plurality of boost chopper unit, with each boost chopper series connection.
5. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that inversion unit is: with one group in twos of six device for power switching, then two devices in every group are joined end to end and form a phase brachium pontis, and then the three-phase brachium pontis composed in parallel the three-phase inversion unit, last diode is connected in parallel on each device for power switching.
6. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that the excitatory unit of soft starter for motor is: with device for power switching inverse parallel in twos, capacity cell connects by switch then; The excitatory unit of soft starter for motor can be made of the excitatory unit of a plurality of soft starter for motor, with the excitatory unit parallel connection of each motor.
7. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that net side three-phase reactive power compensation unit is: with device for power switching inverse parallel in twos, capacity cell connects by switch then; Net side three-phase reactive power compensation unit can be made of a plurality of net side three-phase reactive power compensations unit, and each net side three-phase reactive power compensation unit parallel connection is got final product.
8. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that the switching of excitatory unit of soft starter for motor and net side three-phase reactive power compensation unit, can realize by change over switch, but be not limited to change over switch.
9. according to claim 1 or the 2 described high-power wind turbine grid-connected converters that are applicable to cage type asynchronous generator, it is characterized in that the present invention can be applicable to directly-driving wind power generation system, but be not limited to directly-driving wind power generation system.
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Cited By (7)
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| CN102386633A (en) * | 2011-11-07 | 2012-03-21 | 荣信电力电子股份有限公司 | Megawatt direct-drive alternating current-direct current-alternating current wind power generating system with squirrel-cage asynchronous generator |
| CN102510171A (en) * | 2011-11-04 | 2012-06-20 | 中国人民解放军海军工程大学 | Direct drive type induction wind power generation system |
| CN102969958A (en) * | 2012-11-22 | 2013-03-13 | 许继集团有限公司 | MW-stage cage-type asynchronous machine starting circuit and method |
| EP3076515A1 (en) * | 2015-03-31 | 2016-10-05 | Vacon Oy | An electrical energy supply system |
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
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| CN110896222A (en) * | 2018-09-13 | 2020-03-20 | 中国石化工程建设有限公司 | Reactive compensation method of asynchronous generator |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510171A (en) * | 2011-11-04 | 2012-06-20 | 中国人民解放军海军工程大学 | Direct drive type induction wind power generation system |
| CN102510171B (en) * | 2011-11-04 | 2015-01-14 | 武汉新能源接入装备与技术研究院有限公司 | Direct drive type induction wind power generation system |
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| CN102969958A (en) * | 2012-11-22 | 2013-03-13 | 许继集团有限公司 | MW-stage cage-type asynchronous machine starting circuit and method |
| CN102969958B (en) * | 2012-11-22 | 2015-03-04 | 许继电气股份有限公司 | MW-stage cage-type asynchronous machine starting circuit and method |
| EP3076515A1 (en) * | 2015-03-31 | 2016-10-05 | Vacon Oy | An electrical energy supply system |
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
| CN107701244B (en) * | 2017-11-02 | 2024-09-06 | 国能龙源蓝天节能技术有限公司 | System for coaxially dragging two asynchronous generator sets by steam turbine and grid connection method thereof |
| CN110581642A (en) * | 2018-06-08 | 2019-12-17 | 维谛技术有限公司 | Converter soft start circuit and method |
| CN110581642B (en) * | 2018-06-08 | 2020-09-29 | 维谛技术有限公司 | Converter soft start circuit and method |
| CN110896222A (en) * | 2018-09-13 | 2020-03-20 | 中国石化工程建设有限公司 | Reactive compensation method of asynchronous generator |
| CN110896222B (en) * | 2018-09-13 | 2021-08-13 | 中国石化工程建设有限公司 | Reactive compensation method of asynchronous generator |
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