CN104601001A - Current conversion device and current conversion system for wind generating set - Google Patents

Current conversion device and current conversion system for wind generating set Download PDF

Info

Publication number
CN104601001A
CN104601001A CN201410820174.2A CN201410820174A CN104601001A CN 104601001 A CN104601001 A CN 104601001A CN 201410820174 A CN201410820174 A CN 201410820174A CN 104601001 A CN104601001 A CN 104601001A
Authority
CN
China
Prior art keywords
inverter
phase
side filter
rectifier
winding
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.)
Pending
Application number
CN201410820174.2A
Other languages
Chinese (zh)
Inventor
张一博
刘炳
张国驹
马乐
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.)
Beijing Etechwin Electric Co Ltd
Original Assignee
Beijing Etechwin Electric Co Ltd
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 Beijing Etechwin Electric Co Ltd filed Critical Beijing Etechwin Electric Co Ltd
Priority to CN201410820174.2A priority Critical patent/CN104601001A/en
Publication of CN104601001A publication Critical patent/CN104601001A/en
Pending legal-status Critical Current

Links

Classifications

    • H02J3/386—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • 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

Abstract

The invention provides a current conversion device and a current conversion system for a wind generating set, wherein the current conversion device comprises: the first inverter is used for inverting a first direct current output by the first set of windings of the wind generating set so as to output a two-level voltage waveform; the second inverter is used for inverting the second direct current output by the second set of windings to output a two-level voltage waveform; the first grid side filter is used for filtering the voltage waveform of the two levels output by the first inverter so as to output a first three-phase power; the second network side filter is used for filtering the voltage waveform of the two levels output by the second inverter so as to output a second three-phase power; the open type transformer generates a three-level voltage waveform, the primary side of the open type transformer is an open side, three-phase windings on the primary side are independently connected, one end of each phase of winding is correspondingly connected with one phase output end of the first network side filter, the other end of each phase of winding is correspondingly connected with one phase output end of the second network side filter, and one bridge arm of the first inverter or the second inverter is grounded.

Description

For current converter and the converter system of wind turbine generator
Technical field
The present invention relates to wind power generation field, particularly relate to a kind of current converter for wind turbine generator and converter system.
Background technology
At present, megawatt-stage direct driving type wind power generation system generally adopts back-to-back pair of PWM converter as shown in Figure 1, with reference to Fig. 1, G1, G2 are the double winding of generator, G1, G2 are connected with current transformer 1, current transformer 2 respectively, current transformer 1 and current transformer 2 are two current transformers of phase homeomorphism and capacity, access electrical network after current transformer 1 and current transformer 2 are connected in parallel by step-up transformer T, but the interchange output in Fig. 1 is two level voltage waveforms.
Because market is for the requirement of the many factors such as cost, grid-connected characteristic, the quality of power supply, many level have become the mainstream development direction of wind electric converter.Under same generate output, high-grade voltage converter can reduce cable cost.Many level interconnection technology can reduce the cost of grid-connected filter, improves grid-connected current quality and grid-connected characteristic.In prior art, many level wind electric converter scheme generally adopts the three-level topology structure based on diode clamp, and the program has direct current mid-point voltage and many commutation circuits, and therefore, its cost is higher, controls difficulty large, and risk in commutation course is higher.
Summary of the invention
Embodiments of the invention provide a kind of current converter for wind turbine generator and converter system, to realize exporting three level voltage waveform, reduce hardware cost simultaneously and control difficulty.
To achieve these goals, The embodiment provides a kind of current converter for wind turbine generator, described device comprises: the first inverter, and the first direct current for exporting the first set winding of wind turbine generator carries out inversion to export two level voltage waveforms, second inverter, carries out inversion to export two level voltage waveforms for the second direct current exported the second cover winding of wind turbine generator, first net side filter, is connected with described first inverter, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported described first inverter, second net side filter, is connected with described second inverter, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported described second inverter, open type transformer, for generation of three level voltage waveform, the primary side of described open type transformer is open sides, separate connection between the three-phase windings of described primary side, one end of every phase winding is corresponding with a phase output terminal of described first net side filter to be connected, the other end of every phase winding is corresponding with a phase output terminal of described second net side filter to be connected, wherein, one phase output terminal of described first net side filter and a phase output terminal of described second net side filter are in-phase output end, wherein, a brachium pontis ground connection of described first inverter or the second inverter.
Preferably, the secondary side of described open type transformer is connected with electrical network, and connected mode is star-like connection.
Embodiments of the invention additionally provide a kind of converter system of wind turbine generator, described converter system comprises: the first pusher side filter, be connected with the first set winding of described wind-driven generator, carry out filtering for the first three-phase electricity exported the first set winding of described wind-driven generator, second pusher side filter, overlaps winding with second of described wind-driven generator and is connected, and carries out filtering for the second three-phase electricity exported the second cover winding of described wind-driven generator, first rectifier, one end of described first rectifier is connected with described first pusher side filter, the other end of described first rectifier and described first inverter, for carrying out rectification to export the first direct current to filtered first three-phase electricity, second rectifier, one end of described second rectifier is connected with described second pusher side filter, the other end of described second rectifier and described second inverter, for carrying out rectification to export the second direct current to filtered second three-phase electricity, first inverter, carries out inversion to export two level voltage waveforms for the first direct current exported described first rectifier, second inverter, carries out inversion to export two level voltage waveforms for the second direct current exported described second rectifier, first net side filter, is connected with described first inverter, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported described first inverter, second net side filter, is connected with described second inverter, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported described second inverter, open type transformer, for generation of three level voltage waveform, the primary side of described open type transformer is open sides, separate connection between the three-phase windings of described primary side, one end of every phase winding is corresponding with a phase output terminal of described first net side filter to be connected, the other end of every phase winding is corresponding with a phase output terminal of described second net side filter to be connected, wherein, one phase output terminal of described first net side filter and a phase output terminal of described second net side filter are in-phase output end, wherein, a brachium pontis ground connection of described first inverter or the second inverter.
Preferably, described wind-driven generator is double winding permanent magnet generator.
Preferably, described first net side filter is also for suppressing common-mode voltage and the differential mode voltage of described first rectifier generation.
Preferably, described second net side filter is also for suppressing common-mode voltage and the differential mode voltage of described second rectifier generation.
Preferably, described first rectifier and described second rectifier are three-phase bridge fully controlled rectifier device.
Preferably, described first inverter and described second inverter are three-phase bridge fully controlled rectifier device.
Preferably, described three-phase bridge fully controlled rectifier device comprises three brachium pontis, wherein, each brachium pontis comprises two switch elements be connected in series and two the DC side Support Capacitors be connected in series, described in two switch elements being connected in series and described two the DC side Support Capacitors be connected in series be connected in parallel.
Preferably, the secondary side of described open type transformer is connected with electrical network, and connected mode is star-like connection.
The current converter for wind turbine generator that the embodiment of the present invention provides and converter system, by the open-ended by open type transformer primary side, the two ends of every phase winding are corresponding with a phase output terminal of two net side filters respectively to be connected, and by one of them inverter a brachium pontis ground connection, thus achieve output three level voltage waveform based on the topological structure of two level, compare with the diode clamp three-level topology structure of electric pressure with identical capacity, avoid the risk that direct current neutral-point voltage balance problem and many commutation circuits bring, reduce overall hardware cost simultaneously and control difficulty, and reduce the probability of switching device inefficacy.
Accompanying drawing explanation
Fig. 1 is back-to-back pair of PWM converter of prior art;
Fig. 2 is the structural representation of the current converter for wind turbine generator of the embodiment of the present invention one;
Fig. 3 is the structural representation of the converter system of the wind turbine generator of the embodiment of the present invention two;
Fig. 4 is the voltage V that open type transformer bears with two networking side filter A phases avoltage oscillogram.
Embodiment
Below in conjunction with accompanying drawing the current converter of wind turbine generator is used for the embodiment of the present invention and converter system is described in detail.
Embodiment one
Fig. 2 is the structural representation of the current converter for wind turbine generator of the embodiment of the present invention one, with reference to Fig. 2, it comprises: the first inverter 101, and the first direct current for exporting the first set winding of wind turbine generator carries out inversion to export two level voltage waveforms; Second inverter 102, carries out inversion to export two level voltage waveforms for the second direct current exported the second cover winding of wind turbine generator; First net side filter 103, is connected with the first inverter 101, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported the first inverter 101; Second net side filter 104, is connected with the second inverter 102, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported the second inverter 102; Open type transformer 105, for generation of three level voltage waveform, the primary side of open type transformer is open sides, separate connection between the three-phase windings of primary side, one end of every phase winding is corresponding with a phase output terminal of the first net side filter 103 to be connected, the other end of every phase winding is corresponding with a phase output terminal of the second net side filter 104 to be connected, wherein, one phase output terminal of the first net side filter 103 and a phase output terminal of the second net side filter 104 are in-phase output end, wherein, a brachium pontis ground connection of the first inverter 101 or the second inverter 102.
Here, it should be noted that the open type transformer primary side in the embodiment of the present invention is open sides, namely by two of every phase winding port all openings, two ports of the every phase winding after opening, wherein, one end is corresponding with a phase output terminal of a net side filter to be connected, the other end is corresponding with a phase output terminal of another net side filter to be connected, and two that are connected with two ports of every phase winding to net the output surveying filter be in-phase output end, be separate connection between the three-phase windings of primary side simultaneously.Such as, as shown in Figure 2, one end At1 of the A phase winding of open type transformer is corresponding with the A phase output terminal of the first net side filter 103 to be connected, the other end At2 of A phase winding is corresponding with the A phase output terminal of the second net side filter 104 to be connected, in like manner B phase has same connected mode with C phase, concrete, one end Bt1 of B phase winding is corresponding with the B phase output terminal of the first net side filter 103 to be connected, the other end Bt2 of B phase winding is corresponding with the B phase output terminal of the second net side filter 104 to be connected, one end Ct1 of C phase winding is corresponding with the C phase output terminal of the first net side filter 103 to be connected, the other end Ct2 of C phase winding is corresponding with the C phase output terminal of the second net side filter 104 to be connected.
The current converter for wind turbine generator of the embodiment of the present invention, by the open-ended by open type transformer primary side, separate connection between the three-phase windings of primary side, the two ends of every phase winding are corresponding with a phase output terminal of two net side filters respectively to be connected, and by one of them inverter a brachium pontis ground connection, thus achieve output three level voltage waveform based on the topological structure of two level, compare with the diode clamp three-level topology structure of electric pressure with identical capacity, avoid the risk that direct current neutral-point voltage balance problem and many commutation circuits bring, reduce overall hardware cost simultaneously and control difficulty, and reduce the probability of switching device inefficacy.
Further, the secondary side of open type transformer is connected with electrical network, and connected mode can be star-like connection.
Embodiment two
Fig. 3 is the structural representation of the converter system of the wind turbine generator of the embodiment of the present invention two, with reference to Fig. 3, this wind-driven generator can be double winding permanent magnet generator, converter system comprises: the first pusher side filter 201, be connected with the first set winding of wind-driven generator, carry out filtering for the first three-phase electricity exported the first set winding of wind-driven generator; Second pusher side filter 202, overlaps winding with second of wind-driven generator and is connected, and carries out filtering for the second three-phase electricity exported the second cover winding of wind-driven generator; First rectifier 203, its one end is connected with the first pusher side filter 201, its other end and the first inverter 205, for carrying out rectification to export the first direct current to filtered first three-phase electricity; Second rectifier 204, its one end is connected with the second pusher side filter 202, its other end and the second inverter 206, for carrying out rectification to export the second direct current to filtered second three-phase electricity; First inverter 205, carries out inversion to export two level voltage waveforms for the first direct current exported the first rectifier 203; Second inverter 206, carries out inversion to export two level voltage waveforms for the second direct current exported the second rectifier 204; First net side filter 207, is connected with the first inverter 205, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported the first inverter 205; Second net side filter 208, is connected with the second inverter 206, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported the second inverter 206; Open type transformer 209, for generation of three level voltage waveform, the primary side of open type transformer is open sides, separate connection between the three-phase windings of primary side, one end of every phase winding is corresponding with a phase output terminal of the first net side filter 207 to be connected, the other end of every phase winding is corresponding with a phase output terminal of the second net side filter 208 to be connected, wherein, one phase output terminal of the first net side filter 207 and a phase output terminal of the second net side filter 208 are in-phase output end, wherein, a brachium pontis ground connection of the first inverter or the second inverter.
Concrete, the primary side of this open type transformer is open sides, the i.e. two-port of every phase winding all openings, separate connection between the three-phase windings of primary side, one end of every phase winding is corresponding with a phase output terminal of a net side filter to be connected, the other end of every phase winding is corresponding with a phase output terminal of another net side filter to be connected, and two that are connected with two ports of every phase winding to net the output surveying filter be in-phase output end.Such as, one end At1 of A phase winding is corresponding with the A phase output terminal of a net side filter to be connected, and the other end At2 of A phase winding is corresponding with the A phase output terminal of another net side filter to be connected.Here, it should be noted that the first net side filter 207 and the second net side filter 208 can adopt identical electric parameter design, because rectifier can produce common-mode voltage and differential mode voltage, therefore, first net side filter 207 also can be used for common-mode voltage and the differential mode voltage of the generation of suppression first rectifier, in like manner, the second net side filter 208 is also for suppressing common-mode voltage and the differential mode voltage of the second rectifier generation.
The converter system of the wind turbine generator of the embodiment of the present invention, by the open-ended by open type transformer primary side, separate connection between the three-phase windings of primary side, the two ends of every phase winding are corresponding with a phase output terminal of two net side filters respectively to be connected, and by one of them inverter a brachium pontis ground connection, thus achieve output three level voltage waveform based on the topological structure of two level, compare with the diode clamp three-level topology structure of electric pressure with identical capacity, avoid the risk that direct current neutral-point voltage balance problem and many commutation circuits bring, reduce overall hardware cost simultaneously and control difficulty, and reduce the probability of switching device inefficacy.
Further, the first rectifier and the second rectifier are three-phase bridge fully controlled rectifier device.
Further, the first inverter and the second inverter are three-phase bridge fully controlled rectifier device.
Further, three-phase bridge fully controlled rectifier device comprises three brachium pontis, wherein, each brachium pontis comprises two switch elements be connected in series and two the DC side Support Capacitors be connected in series, and two switch elements be connected in series and two the DC side Support Capacitors be connected in series are connected in parallel.
Further, the secondary side of open type transformer is connected with electrical network, and connected mode is star-like connection.
Below in conjunction with concrete example, further illustrate the operation principle of the current converter for wind turbine generator of the embodiment of the present invention one.
With reference to the core that two networking side inverters, two networking side filters and the open type transformer in Fig. 3, Fig. 3 is the current converter for wind turbine generator of the embodiment of the present invention one, it is also the major part being different from prior art.Here, it should be noted that the primary side of this open type transformer is open sides, the i.e. two-port of every phase winding all openings, one end of every phase winding is corresponding with a phase output terminal of a net side filter to be connected, the other end of every phase winding is corresponding with a phase output terminal of another net side filter to be connected, separate connection between the three-phase windings of primary side.Such as, one end At1 of A phase winding is corresponding with the A phase output terminal of a net side filter to be connected, the other end At2 of A phase winding is corresponding with the A phase output terminal of another net side filter to be connected, and in like manner B phase has same connected mode with C phase, and is separate connection between this three-phase windings.Based on said apparatus structure, its operation principle is described in detail, specific as follows:
First, if A 1, B 1, C 1and A 2, B 2, C 2be respectively the three-phase output end of two networking side inverters, its voltage is respectively V a1, V b1, V c2and V a2, V b2, V c2if two networking side inverter DC voltages are V dc1=V dc2=V dc.
Secondly, for A phase, according to the feature of two level current transformers, the output of net side inverter is two level voltage waveforms, and can produce current potential is V dcwith 0 two kinds of voltage statuss, because of brachium pontis ground connection, then an A of some inverters 1and A 2between there is voltage difference, the voltage that namely open type transformer and two networking side filter A phases (namely in figure between A1 place and A2 place) are born is V a=V a1-V a2, the voltage born in view of net side filter is less, therefore, and V athe voltage between one end At1 of open type transformer A winding and other end At2 can be considered as.Concrete, as shown in table 1, V athere is following output state:
Table 1
V a1 0 0 V dc V dc
V a2 0 V dc 0 V dc
V a＝V a1-V a2 0 -V dc V dc 0
From table 1, V aexportable V dc, 0 ,-V dcthree kinds of voltage statuss, Fig. 4 is the voltage V that open type transformer bears with two networking side filter A phases avoltage oscillogram, as shown in Figure 4, voltage V awaveform by V dc, 0 ,-V dcthree kinds of level are formed, in like manner, and V b, V ccan export three kinds of voltage statuss equally, therefore, the current converter for wind turbine generator of the embodiment of the present invention one based on the converter structure of existing two level outputs, can produce three level voltage waveform in net side.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.

Claims (10)

1. for a current converter for wind turbine generator, it is characterized in that, described device comprises:
First inverter, the first direct current for exporting the first set winding of wind turbine generator carries out inversion to export two level voltage waveforms;
Second inverter, carries out inversion to export two level voltage waveforms for the second direct current exported the second cover winding of wind turbine generator;
First net side filter, is connected with described first inverter, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported described first inverter;
Second net side filter, is connected with described second inverter, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported described second inverter;
Open type transformer, for generation of three level voltage waveform, the primary side of described open type transformer is open sides, separate connection between the three-phase windings of described primary side, one end of every phase winding is corresponding with a phase output terminal of described first net side filter to be connected, and the other end of every phase winding is corresponding with a phase output terminal of described second net side filter to be connected, wherein, one phase output terminal of described first net side filter and a phase output terminal of described second net side filter are in-phase output end
Wherein, a brachium pontis ground connection of described first inverter or the second inverter.
2. device according to claim 1, is characterized in that, the secondary side of described open type transformer is connected with electrical network, and connected mode is star-like connection.
3. a converter system for wind turbine generator, is characterized in that, described converter system comprises:
First pusher side filter, is connected with the first set winding of described wind-driven generator, carries out filtering for the first three-phase electricity exported the first set winding of described wind-driven generator;
Second pusher side filter, overlaps winding with second of described wind-driven generator and is connected, and carries out filtering for the second three-phase electricity exported the second cover winding of described wind-driven generator;
First rectifier, one end of described first rectifier is connected with described first pusher side filter, the other end of described first rectifier and described first inverter, for carrying out rectification to export the first direct current to filtered first three-phase electricity;
Second rectifier, one end of described second rectifier is connected with described second pusher side filter, the other end of described second rectifier and described second inverter, for carrying out rectification to export the second direct current to filtered second three-phase electricity;
First inverter, carries out inversion to export two level voltage waveforms for the first direct current exported described first rectifier;
Second inverter, carries out inversion to export two level voltage waveforms for the second direct current exported described second rectifier;
First net side filter, is connected with described first inverter, carries out filtering to export the first three-phase electricity for the two level voltage waveforms exported described first inverter;
Second net side filter, is connected with described second inverter, carries out filtering to export the second three-phase electricity for the two level voltage waveforms exported described second inverter;
Open type transformer, for generation of three level voltage waveform, the primary side of described open type transformer is open sides, separate connection between the three-phase windings of described primary side, one end of every phase winding is corresponding with a phase output terminal of described first net side filter to be connected, and the other end of every phase winding is corresponding with a phase output terminal of described second net side filter to be connected, wherein, one phase output terminal of described first net side filter and a phase output terminal of described second net side filter are in-phase output end
Wherein, a brachium pontis ground connection of described first inverter or the second inverter.
4. converter system according to claim 3, is characterized in that, described wind-driven generator is double winding permanent magnet generator.
5. converter system according to claim 3, is characterized in that, described first net side filter is also for suppressing common-mode voltage and the differential mode voltage of described first rectifier generation.
6. converter system according to claim 3, is characterized in that, described second net side filter is also for suppressing common-mode voltage and the differential mode voltage of described second rectifier generation.
7. converter system according to claim 3, is characterized in that, described first rectifier and described second rectifier are three-phase bridge fully controlled rectifier device.
8. converter system according to claim 3, is characterized in that, described first inverter and described second inverter are three-phase bridge fully controlled rectifier device.
9. the converter system according to claim 7 or 8, it is characterized in that, described three-phase bridge fully controlled rectifier device comprises three brachium pontis, wherein, each brachium pontis comprises two switch elements be connected in series and two the DC side Support Capacitors be connected in series, described in two switch elements being connected in series and described two the DC side Support Capacitors be connected in series be connected in parallel.
10. converter system according to claim 3, is characterized in that, the secondary side of described open type transformer is connected with electrical network, and connected mode is star-like connection.
CN201410820174.2A 2014-12-25 2014-12-25 Current conversion device and current conversion system for wind generating set Pending CN104601001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410820174.2A CN104601001A (en) 2014-12-25 2014-12-25 Current conversion device and current conversion system for wind generating set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410820174.2A CN104601001A (en) 2014-12-25 2014-12-25 Current conversion device and current conversion system for wind generating set

Publications (1)

Publication Number Publication Date
CN104601001A true CN104601001A (en) 2015-05-06

Family

ID=53126585

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410820174.2A Pending CN104601001A (en) 2014-12-25 2014-12-25 Current conversion device and current conversion system for wind generating set

Country Status (1)

Country Link
CN (1) CN104601001A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105591589A (en) * 2016-02-26 2016-05-18 北京精密机电控制设备研究所 Open type winding motor variable structure driving topology
CN105656387A (en) * 2016-02-26 2016-06-08 北京精密机电控制设备研究所 Variable structure driving topology
CN108306272A (en) * 2018-01-22 2018-07-20 远景能源（江苏）有限公司 Wind generator system common-mode voltage suppressing method
CN109217753A (en) * 2018-09-25 2019-01-15 南京航空航天大学 A kind of topological structure and control method of alternating current-direct current electricity generation system
CN109617120A (en) * 2018-12-24 2019-04-12 北京金风科创风电设备有限公司 Direct-current wind generating set and wind power plant
CN109874400A (en) * 2016-09-30 2019-06-11 日本电产株式会社 Power inverter, motor drive unit and electric power steering apparatus

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105591589A (en) * 2016-02-26 2016-05-18 北京精密机电控制设备研究所 Open type winding motor variable structure driving topology
CN105656387A (en) * 2016-02-26 2016-06-08 北京精密机电控制设备研究所 Variable structure driving topology
CN105656387B (en) * 2016-02-26 2018-01-05 北京精密机电控制设备研究所 Structure changes driving topology
CN105591589B (en) * 2016-02-26 2018-02-09 北京精密机电控制设备研究所 Open winding electric machine structure changes driving topology
CN109874400A (en) * 2016-09-30 2019-06-11 日本电产株式会社 Power inverter, motor drive unit and electric power steering apparatus
CN109874400B (en) * 2016-09-30 2022-07-12 日本电产株式会社 Power conversion device, motor drive unit, and electric power steering device
CN108306272A (en) * 2018-01-22 2018-07-20 远景能源（江苏）有限公司 Wind generator system common-mode voltage suppressing method
CN108306272B (en) * 2018-01-22 2019-04-02 远景能源（江苏）有限公司 Wind generator system common-mode voltage suppressing method
CN109217753A (en) * 2018-09-25 2019-01-15 南京航空航天大学 A kind of topological structure and control method of alternating current-direct current electricity generation system
CN109217753B (en) * 2018-09-25 2020-02-18 南京航空航天大学 Topological structure of alternating current-direct current power generation system and control method
CN109617120A (en) * 2018-12-24 2019-04-12 北京金风科创风电设备有限公司 Direct-current wind generating set and wind power plant
CN109617120B (en) * 2018-12-24 2022-11-29 北京金风科创风电设备有限公司 Direct-current wind generating set and wind power plant

Similar Documents

Publication Publication Date Title
Zhou et al. Analysis and suppression of leakage current in cascaded-multilevel-inverter-based PV systems
CN104601001A (en) Current conversion device and current conversion system for wind generating set
CN110048626B (en) Inverter alternating current closing common-mode impact current suppression method and application device thereof
US20160315540A1 (en) Power converter with controllable dc offset
CN105140966B (en) A kind of modulation strategy for suppressing non-isolation type photovoltaic system leakage current
CN104685771A (en) Power conversion device
Savaghebi et al. Adaptive virtual impedance scheme for selective compensation of voltage unbalance and harmonics in microgrids
CA3066649A1 (en) Constant current fast charging of electric vehicles via dc grid using dual inverter drive
Hota et al. A modified T-structured three-level inverter configuration optimized with respect to PWM strategy used for common-mode voltage elimination
CN110048588B (en) Inverter alternating current closing common-mode impact current suppression method and application device thereof
US9209626B2 (en) Parallelable three-phase photovoltaic power converter
CN102570491A (en) Multilevel power converter or inverter arrangement using h bridges
Rajan et al. Comparative study of multicarrier pwm techniques for a modular multilevel inverter
CN103956927A (en) Voltage-active-clamping non-transformer-type single-phase photovoltaic inverter
EP2887517B1 (en) Method for controlling a multi-phase multi-level inverter
Adam et al. Transient capability assessments of HVDC voltage source converters
US9595862B1 (en) Multi-level inverter systems
CN104065293A (en) Transformer-free type single-phase photovoltaic inverter with mixed voltage clamping
Babu et al. Cascaded two-level inverter-based multilevel static VAr compensator using 12-sided polygonal voltage space vector modulation
CN105790253A (en) Double-loop control method
Ohn et al. Multi-level operation of triple two-level PWM converters
Ma et al. Leakage current analysis of single-phase transformer-less grid-connected PV inverters
Yang et al. Performance of solid state transformers under imbalanced loads in distribution systems
CN104539173A (en) Transformer circuit
Schrader et al. Multivariable control of MMC-based static converters for railway applications

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20150506