CN101783600A - High-voltage commutation circuit topology method and structure - Google Patents
High-voltage commutation circuit topology method and structure Download PDFInfo
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- CN101783600A CN101783600A CN200910226763A CN200910226763A CN101783600A CN 101783600 A CN101783600 A CN 101783600A CN 200910226763 A CN200910226763 A CN 200910226763A CN 200910226763 A CN200910226763 A CN 200910226763A CN 101783600 A CN101783600 A CN 101783600A
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Abstract
The invention provides a high-voltage commutation circuit topology method and structure. The method is characterized in that a plurality of commutation power units formed by an IGBT-based two-level three-phase bridge and a three-phase reactor are respectively connected with output windings at the secondary side of a transformer; and the direct current sides of a plurality of independent commutation power units are connected in series in a certain manner to form high-voltage controllable direct current output, thus forming high-voltage commutation circuit topology. One end of the whole circuit topology structure is high-voltage three-phase alternating current input and the other end thereof is high-voltage direct current output, thus realizing mutual conversion between alternating current and direct current. The high-voltage commutation circuit topology structure comprises a plurality of independent commutation power units and a transformer. The invention has the following main advantages: the multiple technology is employed, the voltage level is elevated by adding the power unit, no voltage-sharing problem because of serial connection of IGBT devices exists, and the alternating current portions of the commutation power units are coupled by the transformer, thus realizing multi-pulse superposition.
Description
Technical field
The present invention relates to a kind of ac-dc converter circuit topological method, refer in particular to a kind of high-voltage commutation circuit topology method, realize the high-voltage large-capacity AC-DC conversion, belong to a kind of novel commutation circuit topology structure.
Background technology
Still many employing IGBT devices change of current in present high-voltage commutation technology.In current converter, in order to improve the capacity of current converter, common two kinds of methods that adopt: the connection in series-parallel of brachium pontis device based on IGBT; The multiple technology of converter.Be representative mainly again with following two kinds of technical approach:
(1) ABB mainly adopts two level structures or three level structures, and its booster tension grade is to adopt the mode of the most direct brachium pontis device series connection to realize that control is simple.But adopt the series-parallel system of this brachium pontis device to have the following disadvantages:
A. export modulating frequency and equal the IGBT frequency, harmonic wave of output voltage is big.
B. the output voltage exponent number is few, and dU/dt is big.
C. series IGBT need add the absorption circuit has increased loss, and IGBT is that compression joint type is difficult for buying.
D. the redundancy to fault is little, and when an IGBT breaks down, system just must quit work.
E. to adopt compression joint type IGBT, difficult purchase, cost height.
(2) Siemens adopts the multiple technology of many power cells, comes the booster tension grade by increasing power cell quantity, and its AC portion is many level superimposing technique.Have that dU/dt harmonic content little, that produce is extremely low, switching loss is little, the advantages such as all pressures problem of no IGBT device series connection, but shortcoming is the control complexity.And intermodule capacitance voltage balanced algorithm complexity, stability is not high; Fault redundance is low, a module failure, and whole system must quit work.According to above-mentioned analysis, present high-voltage commutation technology still comes with some shortcomings, and therefore necessary this is improved.
Summary of the invention
Main purpose of the present invention is the deficiency at the above existing high-voltage commutation method, the present invention proposes a kind of high-voltage commutation method of the current converter based on IGBT, this method fault redundance is good, all pressures problem of no IGBT device series connection, dU/dt is little, and main circuit topological structure can be realized the method for high-voltage large-capacity AC-DC conversion.
Another object of the present invention is the structure that proposes a kind of said method.
Goal of the invention of the present invention realizes by following technology implementation scheme:
A kind of high-voltage commutation circuit topology method, by a plurality of transducing power units of forming by IGBT and two level three-phase bridge and three-phase reactor, be connected with transformer secondary output winding respectively, a plurality of independently transducing power unit DC side are together in series by certain way and form the controlled direct current output of high pressure, form a high-voltage commutation circuit topology.Entire circuit topological structure one end is the input of high pressure three-phase alternating current, and an end is high voltage direct current output, realizes exchanging with direct current and changes mutually.
According to the high-voltage commutation circuit topology structure of a kind of high-voltage commutation device that the inventive method proposed, form by a plurality of independently transducing power units and transformer.Wherein said transducing power unit mainly is to be made of two level three-phase bridge and three-phase reactor based on IGBT, the simplex winding input of the former limit of transformer connects the three-phase high-voltage AC power, secondary is many winding outputs, and each winding is connected with independent transducing power unit ac input end.A plurality of independently transducing power unit DC side are together in series by certain way and form the controlled direct current output of high pressure.Entire circuit topological structure one end is the input of high pressure three-phase alternating current, and an end is high voltage direct current output, realizes exchanging with direct current and changes mutually.
Advantage of the present invention:
A. this current conversion station adopts multiple technology based on the electric power electronic module design principle, comes the booster tension grade by increasing power cell quantity, all pressures problem of no IGBT device series connection;
B. the transducing power unit AC portion can be realized the multiple-pulse stack by transformer coupled, N power cell combination, and overall equivalent switching frequency equals N times of single power cell, and the voltage exponent number is many, and dU/dt is little;
C. owing to the equivalent switching frequency height, therefore the harmonic content that produces is extremely low;
D. adopted modular IGBT, switching loss is little, the efficient height of change of current current transformer itself;
E. transducing power unit (containing modular IGBT), reactor etc. all are the low pressure conventional components, and device is bought easily, and manufacture difficulty is less relatively, the reliability height;
F. for different voltage and current grades, can reach requirement by simple connection;
G. the system failure is redundant high, a transducing power unit fault, but still derate work of system.
Description of drawings
The circuit topological structure that Fig. 1 transducing power unit DC side is directly connected
Fig. 2 transducing power unit DC side is by the circuit topological structure of copped wave module series connection
Reference numeral: 1: three-phase ac transformer; 2: transducing power unit; 3: the three-phase alternating current filter capacitor; 4: three-phase alternating current reactance device; 5: based on the two level three-phase bridge of IGBT; 6: direct-current discharge resistance; 7: direct current supports electric capacity; 8:IGBT copped wave module.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and implementation column.
Accompanying drawing provides the circuit topology example of the dual mode of power cell DC side series connection.Fig. 1 is directly series connection, and Fig. 2 is for to connect by the copped wave module.Be to constitute in the accompanying drawing by 6 transducing power units and a transformer.Main circuit part in the unit of described merit change of current rate shown in the legend is by two level three-phase bridge based on IGBT, three-phase alternating current reactance device, and the three-phase alternating current filter capacitor, direct current supports electric capacity, direct-current discharge resistance, and IGBT copped wave module constitutes.From accompanying drawing as can be seen, the transducing power unit of high-voltage commutation device of the present invention mainly is to be made of two level three-phase bridge and three-phase reactor based on IGBT, the simplex winding input of the former limit of transformer connects the three-phase high-voltage AC power, secondary is many winding outputs, and each winding is connected with independent transducing power unit ac input end.A plurality of independently transducing power unit DC side are together in series by certain way and form the controlled direct current output of high pressure.Entire circuit topological structure one end is the input of high pressure three-phase alternating current, and an end is high voltage direct current output, realizes exchanging with direct current and changes mutually.Wherein:
Fig. 1 indicates the transducing power unit circuit topology of high-voltage commutation device; Transducing power unit circuit topology one end of high-voltage commutation device is three-phase alternating current incoming junction A2, B2, C2.Three-phase alternating current filter capacitor 3 is connected in parallel on three-phase alternating current incoming junction A2, B2, the three-phase alternating current input side of C2.Three-phase alternating current incoming junction A2, B2, C2 is connected with the input of three-phase alternating current reactance device 4, and the output of reactor 4 is connected to the ac input end based on the two level three-phase bridge 5 of IGBT, the dc output end Ud2+ of three-phase bridge 5, Ud2-are connected to direct-current discharge resistance 6 and dc filter capacitor 7.Whole power cell one end is low-voltage three-phase AC input A2, B2, C2; One end is low-voltage direct output Ud2+, Ud2-.
6 transducing power units are arranged, the high voltage direct current output end Ud1+ that the dc output end Ud2+ of 6 transducing power units, Ud2-are together in series up and down and constitute high-voltage commutation circuit topology, Ud1-in the high-voltage commutation device shown in Figure 1.High-voltage alternating input A, B, C are connected to and exchange three-phase transformer 1 former limit winding, and transformer 1 secondary has 6 low pressure three phase windings outputs, are connected respectively to the ac input end of 6 transducing power units.Whole high-voltage commutation circuit topology one end is high pressure three-phase alternating current input A, B, C; One end is high voltage direct current output end Ud1+, Ud1-.
Fig. 2 indicates another kind of high-voltage commutation rating of set unit, and is different with Fig. 1, and at the dc output end Ud2+ of two level three-phase bridge 5, Ud2-is parallel with an IGBT copped wave module 8 in addition.Whole power cell one end is three-phase alternating current input A2, B2, C2; One end is copped wave output Udchop2, Ud2-.
6 transducing power units are arranged in the high-voltage commutation device shown in Figure 2, and the copped wave output of 6 transducing power units is connected up and down and is constituted the high pressure copped wave output Udchop1 of high-voltage commutation circuit topology, Ud1-.High-voltage alternating input A, B, C are connected to and exchange three-phase transformer 1 former limit winding, and 6 low pressure three phase windings of transformer 1 secondary are exported, and are connected respectively to the ac input end of 6 transducing power units.Whole high-voltage commutation circuit topology one end is high pressure three-phase alternating current input A, B, C; One end is high pressure copped wave output Udlchop1, Ud1-.
Claims (6)
1. high-voltage commutation circuit topology method is characterized in that: the high-voltage commutation circuit topology structure of high-voltage commutation device, form by a plurality of independently transducing power units and transformer; By a plurality of transducing power units of forming by IGBT and two level three-phase bridge and three-phase reactor, be connected with transformer secondary output winding respectively, a plurality of independently transducing power unit DC side are together in series by certain way and form the controlled direct current output of high pressure, form a high-voltage commutation circuit topology; Entire circuit topological structure one end is the input of high pressure three-phase alternating current, and an end is high voltage direct current output, realizes exchanging with direct current and changes mutually.
2. high-voltage commutation device, it is characterized in that: the transducing power unit of described high-voltage commutation device mainly is to be made of two level three-phase bridge and three-phase reactor based on IGBT, the simplex winding input of the former limit of transformer connects the three-phase high-voltage AC power, secondary is many winding outputs, and each winding is connected with independent transducing power unit ac input end; A plurality of independently transducing power unit DC side are together in series by certain way and form the controlled direct current output of high pressure; Entire circuit topological structure one end is the input of high pressure three-phase alternating current, and an end is high voltage direct current output.
3. high-voltage commutation device as claimed in claim 2 is characterized in that: high-voltage commutation circuit topology structure one end of described high-voltage commutation device is the three-phase alternating current incoming junction; The three-phase alternating current filter capacitor is connected in parallel on the three-phase alternating current input side of three-phase alternating current incoming junction; The three-phase alternating current incoming junction is connected with the input of three-phase alternating current reactance device, and the output of reactor is connected to the ac input end based on the two level three-phase bridge of IGBT, and the dc output end of three-phase bridge is connected to direct-current discharge resistance and dc filter capacitor; Whole power cell one end is the low-voltage three-phase AC input; One end is the low-voltage direct output.
4. high-voltage commutation device as claimed in claim 2 is characterized in that: shown in the high-voltage commutation device in 6 transducing power units are arranged, the high voltage direct current output end that the dc output end of 6 transducing power units is together in series up and down and constitutes high-voltage commutation circuit topology; The high-voltage alternating input is connected to and exchanges the former limit of three-phase transformer winding, and the transformer secondary has 6 low pressure three phase windings outputs, is connected respectively to the ac input end of 6 transducing power units.
5. high-voltage commutation device as claimed in claim 2 is characterized in that: at the dc output end of two level three-phase bridge, be parallel with an IGBT copped wave module in addition; Whole power cell one end is the three-phase alternating current input; One end is the copped wave output.
6. high-voltage commutation device as claimed in claim 2 is characterized in that: 6 transducing power units are arranged in the high-voltage commutation device, and the copped wave output of 6 transducing power units is connected up and down and is constituted the high pressure copped wave output of high-voltage commutation circuit topology; The high-voltage alternating input is connected to and exchanges the former limit of three-phase transformer winding, and 6 low pressure three phase windings of transformer secondary are exported, and are connected respectively to the ac input end of 6 transducing power units.
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| CN200910226763A CN101783600A (en) | 2009-12-30 | 2009-12-30 | High-voltage commutation circuit topology method and structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012136145A1 (en) * | 2011-04-07 | 2012-10-11 | Li Yongpan | Method, circuit, and high-voltage transformer for implementing high-voltage inversion by using low-voltage inversion |
| CN102739070A (en) * | 2011-04-07 | 2012-10-17 | 李永盼 | Energy feedback type three-phase high-voltage frequency converter |
| CN103427653A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN109687726A (en) * | 2018-12-28 | 2019-04-26 | 浙江华云清洁能源有限公司 | A kind of power inverter based on multiwinding transformer coupling |
-
2009
- 2009-12-30 CN CN200910226763A patent/CN101783600A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012136145A1 (en) * | 2011-04-07 | 2012-10-11 | Li Yongpan | Method, circuit, and high-voltage transformer for implementing high-voltage inversion by using low-voltage inversion |
| CN102739097A (en) * | 2011-04-07 | 2012-10-17 | 李永盼 | Method and circuit utilizing low-voltage inversion to realize high-voltage inversion, and high-voltage converter |
| CN102739070A (en) * | 2011-04-07 | 2012-10-17 | 李永盼 | Energy feedback type three-phase high-voltage frequency converter |
| CN102739070B (en) * | 2011-04-07 | 2016-01-20 | 李永盼 | A kind of energy feedback type three-phase high-voltage frequency converter |
| CN102739097B (en) * | 2011-04-07 | 2016-03-30 | 李永盼 | A kind of low pressure inversion realizes high-voltage inverted method, circuit and high tension transformer |
| CN103427653A (en) * | 2013-08-01 | 2013-12-04 | 南京南瑞继保电气有限公司 | High-voltage DC-DC conversion device |
| CN109687726A (en) * | 2018-12-28 | 2019-04-26 | 浙江华云清洁能源有限公司 | A kind of power inverter based on multiwinding transformer coupling |
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Application publication date: 20100721 |