CN205622521U - Wind power converter owner circuit topology structure of two unit series connection formulas of dc bus - Google Patents
Wind power converter owner circuit topology structure of two unit series connection formulas of dc bus Download PDFInfo
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- CN205622521U CN205622521U CN201620188331.7U CN201620188331U CN205622521U CN 205622521 U CN205622521 U CN 205622521U CN 201620188331 U CN201620188331 U CN 201620188331U CN 205622521 U CN205622521 U CN 205622521U
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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
Abstract
The utility model discloses a wind power converter owner circuit topology structure of two unit series connection formulas of dc bus, the system comprises a generator, bus line, the negative busbar, the transformer of connecting outside electric wire netting, and connection bus line, the rectifier module of negative busbar, boost module, the contravariant module, bus line and negative busbar process rectifier module, boost module, the contravariant module is handled the back and is established ties and the neutal point earthing, higher generator export voltage can be undertaken in this design, improve direct current busbar voltage grade simultaneously, and with reducing bus current under the constant power, be applicable to the blunt type wind power converter that drives of great merit, control mode is nimble, the degree of difficulty of while reduced insulation, the overall structure ratio changes the IGBT power device merely or generating line parallel circuit is compacter, reduce the occupation of land volume of converter, easy realization design lectotype and systematized configuration.
Description
Technical field
This utility model relates to a kind of wind electric converter, the main circuit of wind power converter topological structure of a kind of dc bus two unit series connection type.
Background technology
Extensive application along with new forms of energy, on the field of wind-power electricity generation, in order to improve wind-powered electricity generation utilization ratio, the power of Wind turbines constantly increases, and the increase of power brings is the problem that increases accordingly of generator outlet voltage and current, therefore improves constantly the demand of Converter Capacity.
Owing on market today, the current transformer of main flow is low volage current transformer, the power device IGBT power device that low volage current transformer uses is mostly 1700V electric pressure, the increase of current transformer power and the IGBT power device specification rising high request use of generator outlet voltage are continuously increased, due to by IGBT power device device using priciple and use technical limitations, users typically can only change the IGBT power device of bigger specification or use the mode of parallel power device parallel connection to realize, when power increases to a certain degree, current transformer volume will increase owing to using mode in parallel, but the space in wind-powered electricity generation base tower is limited, current transformer will be unable to be placed on Ji Tanei.
Utility model content
For solving above-mentioned technical problem, the purpose of this utility model is to provide the topological structure of a kind of main circuit of converter by the series connection of dc bus two unit.
The technical solution adopted in the utility model is:
nullA kind of main circuit of wind power converter topological structure of dc bus two unit series connection type，Including electromotor、Positive bus-bar、Negative busbar、Connect the transformator of external electrical network、And connection positive bus-bar、The rectification module of negative busbar、Boost module、Inversion module，The input of described rectification module is electrically connected with electromotor，The input of described boost module is electrically connected with the outfan of rectification module，The outfan of described boost module is electrically connected with the input of inversion module，The outfan of this inversion module is grid-connected with transformator to be connected，Described boost module is divided into positive boost module、Negative boost module，Described inversion module includes positive inversion module、Negative inversion module，Described rectification module、Positive boost module、Positive inversion module、Negative inversion module、Negative boost module is sequentially connected in series，Described transformator respectively with the outfan of positive inversion module、The outfan of negative inversion module is electrically connected with，Described positive inversion module and the junction point ground connection of negative inversion module.
nullDescribed positive boost module includes the first positive booster circuit and the second positive booster circuit，Described first positive booster circuit includes inductance L1、IGBT power device Q1、Diode D1、Diode D5、Electric capacity C1，IGBT power device Q1 and diode D1 composes in parallel the first on-off circuit，Input in this positive booster circuit connects one end of inductance L1，The other end of this inductance L1 is connected with diode D5 positive pole and is connected with the positive pole of the first on-off circuit，Described second positive booster circuit includes inductance L2、IGBT power device Q2、Diode D2、Diode D6、Electric capacity C2，IGBT power device Q2 and diode D2 composes in parallel second switch circuit，Input in this positive booster circuit connects one end of inductance L2，The other end of this inductance L2 is connected with diode D6 positive pole and is connected with the positive pole of second switch circuit，This diode D6 negative pole is connected with diode D5 negative pole and is connected with the positive pole of electric capacity C1,The negative pole of the first on-off circuit is connected with the negative pole of second switch circuit and is connected and ground connection with electric capacity C2 negative pole，Electric capacity C1 negative pole is connected with electric capacity C2 positive pole and the neutral point of junction point N1 connection transformer star winding a，Described negative boost module includes the first negative booster circuit and the second negative booster circuit，Described first negative booster circuit includes inductance L3、IGBT power device Q3、Diode D3、Diode D7、Electric capacity C3，IGBT power device Q3 and diode D3 composes in parallel the 3rd on-off circuit，Input in this negative booster circuit connects one end of inductance L3，The other end of this inductance L3 is connected with diode D7 negative pole and is connected with the negative pole of the 3rd on-off circuit，Described second negative booster circuit includes inductance L4、IGBT power device Q4、Diode D4、Diode D8、Electric capacity C4，IGBT power device Q4 and diode D4 composes in parallel the 4th on-off circuit，Input in this negative booster circuit connects one end of inductance L4，The other end of this inductance L4 is connected with diode D8 negative pole and is connected with the negative pole of the 4th on-off circuit，This diode D7 positive pole is connected with diode D8 positive pole and is connected with electric capacity C4 negative pole，The positive pole of the 3rd on-off circuit and the positive pole of the 4th on-off circuit connect and are connected and ground connection with electric capacity C3 positive pole，Electric capacity C3 negative pole is connected with electric capacity C4 positive pole and the neutral point of junction point N2 connection transformer star winding b.
This converter circuit also includes positive braking resistor and negative braking resistor, and this positive braking resistor is electrically connected with positive boost module, positive inversion module respectively, and this negative braking resistor is electrically connected with negative boost module, negative inversion module respectively.
The beneficial effects of the utility model:
This utility model converter circuit is just, negative busbar is through rectification module, boost module, inversion module is connected and neutral ground after processing, the design can undertake higher generator outlet voltage, improve DC bus-bar voltage grade simultaneously, and under Same Efficieney, reduce bus current, it is applicable to high-power direct-driving type wind electric converter, control mode is flexible, reduce the difficulty of insulation simultaneously, overall structure is compacter than simple replacing IGBT power device or bus parallel circuit, reduce the occupation of land volume of current transformer, easily realize design selection and systematization configuration.
Boost module includes positive and negative boost module, and just boost module includes two positive booster circuits, negative boost module includes that two negative booster circuits, two booster circuits can share bigger electric current, increase due to generated output power, it is also possible to stablize busbar voltage.
It is additionally provided with braking resistor on bus, can carry out shutting down electric discharge, the skidding when bus overvoltage when normal work.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described further.
Fig. 1 is the schematic diagram of this utility model converter circuit.
Fig. 2 is the positive boost module circuit diagram of this utility model converter circuit.
Fig. 3 is the negative boost module circuit diagram of this utility model converter circuit.
Detailed description of the invention
nullAs shown in Figure 1，The converter circuit of this utility model dc bus two unit series connection type，Including electromotor 1、Positive bus-bar 2、Negative busbar 3、Connect the transformator 4 of external electrical network、And connect positive bus-bar 2、The rectification module 5 of negative busbar 3、Boost module 6、Inversion module 7，The input of described rectification module 5 is electrically connected with electromotor 1，The input of described boost module 6 is electrically connected with the outfan of rectification module 5，The outfan of described boost module 6 is electrically connected with the input of inversion module 7，The outfan of this inversion module 7 is grid-connected with transformator 4 to be connected，Electric energy is input in converter circuit by electromotor 1，By rectification module 5, exchange is become direct current，Boosted by boost module 6 again，Become exchanging by direct current finally by inversion module 7，And carry out transformation conveying with transformator 4 after being connected.
The improvement of the design is that boost module 6 is divided into positive boost module 61, negative boost module 62, inversion module 7 includes positive inversion module 71, negative inversion module 72, rectification module 5, positive boost module 61, positive inversion module 71, negative inversion module 72, negative boost module 62 is sequentially connected in series, transformator 4 respectively with the outfan of positive inversion module 71, the outfan of negative inversion module 72 is electrically connected with, positive inversion module 71 and the junction point ground connection of negative inversion module 72, the design can undertake higher electromotor 1 exit potential, improve DC bus-bar voltage grade simultaneously, and under Same Efficieney, reduce bus current, reduce the difficulty of insulation, overall structure is compacter than simple replacing IGBT power device or bus parallel circuit, reduce the volume of current transformer, and then reduce occupation of land position.
nullSimultaneously，Owing to the output of electromotor 1 increases，Line current also can be correspondingly improved when voltage brings up to limit value，As shown in Figure 1-Figure 3，The positive boost module 61 of the design includes the first positive booster circuit and the second positive booster circuit，Described first positive booster circuit includes inductance L1、IGBT power device Q1、Diode D1、Diode D5、Electric capacity C1，IGBT power device Q1 and diode D1 composes in parallel the first on-off circuit，Input in this positive booster circuit connects one end of inductance L1，The other end of this inductance L1 is connected with diode D5 positive pole and is connected with the positive pole of the first on-off circuit，Described second positive booster circuit includes inductance L2、IGBT power device Q2、Diode D2、Diode D6、Electric capacity C2，IGBT power device Q2 and diode D2 composes in parallel second switch circuit，Input in this positive booster circuit connects one end of inductance L2，The other end of this inductance L2 is connected with diode D6 positive pole and is connected with the positive pole of second switch circuit，This diode D6 negative pole is connected with diode D5 negative pole and is connected with the positive pole of electric capacity C1,The negative pole of the first on-off circuit is connected with the negative pole of second switch circuit and is connected and ground connection with electric capacity C2 negative pole，Electric capacity C1 negative pole is connected with electric capacity C2 positive pole and the neutral point of junction point N1 connection transformer 4 star winding a，Described negative boost module 62 includes the first negative booster circuit and the second negative booster circuit，Described first negative booster circuit includes inductance L3、IGBT power device Q3、Diode D3、Diode D7、Electric capacity C3，IGBT power device Q3 and diode D3 composes in parallel the 3rd on-off circuit，Input in this negative booster circuit connects one end of inductance L3，The other end of this inductance L3 is connected with diode D7 negative pole and is connected with the negative pole of the 3rd on-off circuit，Described second negative booster circuit includes inductance L4、IGBT power device Q4、Diode D4、Diode D8、Electric capacity C4，IGBT power device Q4 and diode D4 composes in parallel the 4th on-off circuit，Input in this negative booster circuit connects one end of inductance L4，The other end of this inductance L4 is connected with diode D8 negative pole and is connected with the negative pole of the 4th on-off circuit，This diode D7 positive pole is connected with diode D8 positive pole and is connected with electric capacity C4 negative pole，The positive pole of the 3rd on-off circuit and the positive pole of the 4th on-off circuit connect and are connected and ground connection with electric capacity C3 positive pole，Electric capacity C3 negative pole is connected with electric capacity C4 positive pole and the neutral point of junction point N2 connection transformer 4 star winding b，Design bus herein can share bigger electric current，Busbar voltage can also be stablized.
Additionally; as shown in Figure 1; positive braking resistor 21 and negative braking resistor 31 is also included on this converter circuit; this positive braking resistor 21 is electrically connected with positive boost module 61, positive inversion module 71 respectively; this negative braking resistor 31 is electrically connected with negative boost module 62, negative inversion module 72 respectively; can carry out shutting down electric discharge, the skidding when bus overvoltage when normal work.
The foregoing is only preferred embodiments of the present utility model, this utility model is not limited to above-mentioned embodiment, as long as realizing within the technical scheme of this utility model purpose broadly falls into protection domain of the present utility model with essentially identical means.
Claims (3)
- null1. the main circuit of wind power converter topological structure of dc bus two unit series connection type，Including electromotor (1)、Positive bus-bar (2)、Negative busbar (3)、Connect the transformator (4) of external electrical network、And connect positive bus-bar (2)、The rectification module (5) of negative busbar (3)、Boost module (6)、Inversion module (7)，The input of described rectification module (5) is electrically connected with electromotor (1)，The input of described boost module (6) is electrically connected with the outfan of rectification module (5)，The outfan of described boost module (6) is electrically connected with the input of inversion module (7)，The outfan of this inversion module (7) is grid-connected with transformator (4) to be connected，It is characterized in that: described boost module (6) is divided into positive boost module (61)、Negative boost module (62)，Described inversion module (7) includes positive inversion module (71)、Negative inversion module (72)，Described rectification module (5)、Positive boost module (61)、Positive inversion module (71)、Negative inversion module (72)、Negative boost module (62) is sequentially connected in series，Described transformator (4) respectively with the outfan of positive inversion module (71)、The outfan of negative inversion module (72) is electrically connected with，Described positive inversion module (71) and the junction point ground connection of negative inversion module (72).
- nullThe main circuit of wind power converter topological structure of a kind of dc bus two unit series connection type the most according to claim 1，It is characterized in that: described positive boost module (61) includes the first positive booster circuit and the second positive booster circuit，Described first positive booster circuit includes inductance L1、IGBT power device Q1、Diode D1、Diode D5、Electric capacity C1，IGBT power device Q1 and diode D1 composes in parallel the first on-off circuit，Input in this positive booster circuit connects one end of inductance L1，The other end of this inductance L1 is connected with diode D5 positive pole and is connected with the positive pole of the first on-off circuit，Described second positive booster circuit includes inductance L2、IGBT power device Q2、Diode D2、Diode D6、Electric capacity C2，IGBT power device Q2 and diode D2 composes in parallel second switch circuit，Input in this positive booster circuit connects one end of inductance L2，The other end of this inductance L2 is connected with diode D6 positive pole and is connected with the positive pole of second switch circuit，This diode D6 negative pole is connected with diode D5 negative pole and is connected with the positive pole of electric capacity C1,The negative pole of the first on-off circuit is connected with the negative pole of second switch circuit and is connected and ground connection with electric capacity C2 negative pole，Electric capacity C1 negative pole is connected with electric capacity C2 positive pole and the neutral point of junction point N1 connection transformer (4) star winding a，Described negative boost module (62) includes the first negative booster circuit and the second negative booster circuit，Described first negative booster circuit includes inductance L3、IGBT power device Q3、Diode D3、Diode D7、Electric capacity C3，IGBT power device Q3 and diode D3 composes in parallel the 3rd on-off circuit，Input in this negative booster circuit connects one end of inductance L3，The other end of this inductance L3 is connected with diode D7 negative pole and is connected with the negative pole of the 3rd on-off circuit，Described second negative booster circuit includes inductance L4、IGBT power device Q4、Diode D4、Diode D8、Electric capacity C4，IGBT power device Q4 and diode D4 composes in parallel the 4th on-off circuit，Input in this negative booster circuit connects one end of inductance L4，The other end of this inductance L4 is connected with diode D8 negative pole and is connected with the negative pole of the 4th on-off circuit，This diode D7 positive pole is connected with diode D8 positive pole and is connected with electric capacity C4 negative pole，The positive pole of the 3rd on-off circuit and the positive pole of the 4th on-off circuit connect and are connected and ground connection with electric capacity C3 positive pole，Electric capacity C3 negative pole is connected with electric capacity C4 positive pole and the neutral point of junction point N2 connection transformer (4) star winding b.
- The main circuit of wind power converter topological structure of a kind of dc bus two unit series connection type the most according to claim 1, it is characterized in that: also include positive braking resistor (21) and negative braking resistor (31), this positive braking resistor (21) is electrically connected with positive boost module (61), positive inversion module (71) respectively, and this negative braking resistor (31) is electrically connected with negative boost module (62), negative inversion module (72) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620188331.7U CN205622521U (en) | 2016-03-11 | 2016-03-11 | Wind power converter owner circuit topology structure of two unit series connection formulas of dc bus |
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| CN201620188331.7U CN205622521U (en) | 2016-03-11 | 2016-03-11 | Wind power converter owner circuit topology structure of two unit series connection formulas of dc bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656321A (en) * | 2016-03-11 | 2016-06-08 | 广东明阳龙源电力电子有限公司 | Wind power converter main circuit topological structure with two units of direct-current bus connected in series |
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2016
- 2016-03-11 CN CN201620188331.7U patent/CN205622521U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105656321A (en) * | 2016-03-11 | 2016-06-08 | 广东明阳龙源电力电子有限公司 | Wind power converter main circuit topological structure with two units of direct-current bus connected in series |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180417 Address after: 528437 Mingyang Industrial Park, 22 Torch Road, Zhongshan high tech Industrial Development Zone, Guangdong, China Patentee after: Ming Yang wisdom Energy Group AG Address before: 528437 Guangdong city of Zhongshan Province Torch Torch Development Zone, Road No. 22 Mingyang Longyuan Power Electronics Co. Ltd. Patentee before: Guangdong Mingyang Longyuan Power Electronics Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191126 Address after: 300450 Building 2, No. 526, Gaoxin 6th Road, Binhai Science Park, Binhai high tech Zone, No. 13888, Jinhan Road, Binhai New Area, Tianjin Patentee after: Tianjin Mingyang wind power equipment Co., Ltd. Address before: 528437 Mingyang Industrial Park, 22 Torch Road, Zhongshan high tech Industrial Development Zone, Guangdong, China Patentee before: Ming Yang wisdom Energy Group AG |
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| TR01 | Transfer of patent right |