CN104767393A - Cascading-parallel connection mixing converter device - Google Patents
Cascading-parallel connection mixing converter device Download PDFInfo
- Publication number
- CN104767393A CN104767393A CN201510181639.9A CN201510181639A CN104767393A CN 104767393 A CN104767393 A CN 104767393A CN 201510181639 A CN201510181639 A CN 201510181639A CN 104767393 A CN104767393 A CN 104767393A
- Authority
- CN
- China
- Prior art keywords
- phase
- output
- voltage
- unit module
- power unit
- 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
Links
Classifications
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
-
- 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
- H02M1/007—Plural converter units in cascade
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a cascading-parallel connection mixing converter device. A three-phase power supply provides energy. The power supply is divided into three phases through a segmentation transformer. Each-phase voltage of a secondary winding is segmented into a plurality of independent low voltages which pass through a single phase-single phase converter respectively, and single-phase alternating current output voltages are formed by cascading. Each-phase cascading output is connected in parallel and then is connected to a load through an LC filtering circuit, and a three-phase-single-phase converter is formed. A power unit module is a single phase-single phase PWM converter which can be of a two-level structure or a multi-level structure. According to the topological structure, a low-voltage device can be used in a high-voltage place, an inverter carries out outputting at a high voltage level, cascading-parallel connection units can be increased or decreased, and accordingly different designing requirements are met. An output end can be connected with the load and is regarded as the three-phase-single-phase converter. The device can also be used in an electric railway such as an identical-phase power supply system, the output end can provide power for a traction net, three phases A, B and C of the three-phase power supply for providing power can share power needed by the load or the traction net together, and energy can flow in both ways.
Description
Technical field
The present invention relates to a kind of cascade-mixing transformation apparatus in parallel, particularly relate to a kind of cascade for electric railway-mixing transformation apparatus in parallel.
Background technology
Converter carries out transformation of electrical energy by power electronic technology, and it utilizes thyristor circuit, and what all kinds of interchange or DC power supply input are changed into required output voltage and frequency stabilization exchanges output.Nowadays also impel high power converters fast-developing developing rapidly of the field such as backup system of electric power system, storage battery, the purposes of high power converter is also increasingly extensive.Also be like this for electric railway design, need to export enough powerful power supply for locomotive trouble-free operation at inverter side.Be applied to the converter of electric railway, it is very strict that it exports power requirements, and how improving converter capacity simultaneously and to improve the quality that it exports electric energy, is an important development direction of modern inversion transformation technique.Therefore studying the circuit topological structure of high power converter, thus improve converters capacity and improve its output quality of power supply, is extremely have Research Significance.
Converter cascade has the characteristic of series connection, can provide input by the module of smaller power, realizes high-power and exports, and realizes making low-voltage device be applied to high pressure occasion, the function that converter exports with higher electric pressure.The parallel running of converter, not only can realize power combing, improves the grade of output current, meets the requirement that changer system big current grade exports, and increases the capacity of power supply, and can improve the reliability of power supply.
In the middle of electric railway design, electric power system output voltage can only arrive 27.5kv, if desired continues to increase converter output capacity, only continue to increase concatenation unit just null(NUL), at this moment can consider to add parallel connection, improve output current, thus increase converter capacity further.
Summary of the invention
Object of the present invention is just to provide a kind of cascade-mixing transformation device topological structure in parallel, it is flexible that this topological structure has control mode, the phase place of output voltage and amplitude all can need to carry out regulation and control according to equipment, the expansion of power converter cells can be carried out according to engineering actual demand, and harmonic wave of output voltage content is low, converter operating efficiency is higher, accommodates for advantages such as high-power outputs.
The present invention solves its technical problem, and the technical scheme adopted is:
A kind of cascade-mixing transformation apparatus in parallel, the energy is provided by three phase mains, by transformer, power supply is divided into three-phase, each phase voltage of secondary winding is split as several independently low-voltages, these independent voltages, respectively through single-phase-single-phase invertor, form single phase alternating current (A.C.) output voltage by cascade; And every phase cascaded-output is connected to load through LC filter circuit after parallel connection respectively, form three-phase-single-phase invertor, its concrete connected mode is:
A, cutting transformer first side winding connect three phase mains, each phase voltage of secondary side winding is split as the individual independently low-voltage of n, for first-phase voltage, each independently low-voltage all connect with corresponding power unit module, the cascade successively of power unit module 11 to 1n output, namely the output negative terminal mouth 11N of power unit module 11 is connected with the output plus terminal mouth 12P of power unit module 12, the output negative terminal mouth 12N of power unit module 12 is connected with the output plus terminal mouth 13P of power unit module 13, by that analogy; In like manner, second and third phase voltage is identical with first-phase with power unit module connected mode.Output port after each phase power module cascade connection is respectively 11P and 1nN, 21P and 2nN, 31 and 3n;
B, output 11P, 21P, 31P end are connected to P point jointly, be connected with load or Traction networks anode after filtering LC filter circuit, output 1nN, 2nN, 3nN end is connected to N point jointly, is connected, realizes the parallel connection of three single phase alternating current (A.C.) output voltages with load or Traction networks negative terminal;
Described power unit module is single-phase-single-phase PWM converter.
Cascade of the present invention-mixing transformation device in parallel, can make low-voltage device be applied to high pressure occasion, realize converter and export with higher electric pressure, and converter parallel connection can improve the grade of output current, meets the requirement of changer system High-current output.Output can connect load, then this device can be considered a three-phase-single-phase invertor; This device also can be applicable to electric railway as in homophase electric power system, and output can be Traction networks and powers, and provides three phase mains A, B, C three-phase of the energy can load sharing or Traction networks power demand jointly, and energy capable of bidirectional flowing.
Compared with prior art, the invention has the beneficial effects as follows: a three-phase-single-phase invertor can be regarded as, for different loads provides the energy; For electric railway, because output rated voltage is 27.5kv, the higher capacity requirement of load cannot be met by continuing to improve output voltage grade, therefore the present invention is improved its topological structure on the basis of inverter side cascade, add parallel-connection structure, the advantage of converter cascade booster tension grade is combined with the advantage of motor current grade in parallel, realizes high-power output, meet different designs demand.
Accompanying drawing explanation
Fig. 1 be the embodiment of the present invention circuit theory diagrams;
Fig. 2 be based on two level H-bridge structures single-phase-single-phase PWM converter;
Fig. 3 be based on three level diode clamp structure single-phase-single-phase PWM converter.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is cascade of the present invention-mixing transformation device main circuit diagram in parallel, there is provided the energy by three phase mains, by cutting transformer, power supply is divided into three-phase, cutting transformer first side winding connects three phase mains, each phase voltage of secondary side winding is split as the individual independently low-voltage of n, as U in Fig. 1
n1, U
n2, U
n3shown in, for the 1st phase voltage, each independently low-voltage all connect with corresponding power unit module, the cascade successively of power unit module 11 to 1n output, namely the output negative terminal mouth 11N of power cell 11 is connected with the output plus terminal mouth 12P of power cell 12, the output negative terminal mouth 12N of power cell 12 is connected with the output plus terminal mouth 13P of power cell 13, by that analogy.In like manner, the 2nd, 3 phase voltages and power unit module connected mode and the 1st mutually identical.Output port after each phase power module cascade connection is respectively 11P and 1nN, 21P and 2nN, 31 and 3n.Output 11P, 21P, 31P end is connected to P point jointly, be connected with load or Traction networks anode after filtering LC filter circuit, output 1nN, 2nN, 3nN end is connected to N point jointly, is connected, realizes the parallel connection of three single phase alternating current (A.C.) output voltages with load or Traction networks negative terminal.Described power unit module is single-phase-single-phase PWM converter, and converter can be two level block, as shown in Figure 2, also can be many level block, as three level diode clamp structure in Fig. 3.
Cascade-mixing transformation device in parallel that the present invention proposes, converter cascade can make low-voltage device be applied to high pressure occasion, realize converter to export with higher electric pressure, and converter parallel connection can improve the grade of output current, meets the requirement of changer system High-current output.Output can connect load, then this device can be considered a three-phase-single-phase invertor; This device also can be applicable to electric railway as in homophase electric power system, and output can be Traction networks and powers, and provides three phase mains A, B, C three-phase of the energy can load sharing or Traction networks power demand jointly, and energy capable of bidirectional flowing.
Claims (2)
1. cascade-mixing transformation apparatus in parallel, it is characterized in that, the energy is provided by three phase mains, by transformer, power supply is divided into three-phase, each phase voltage of secondary winding is split as several independently low-voltages, these independent voltages, respectively through single-phase-single-phase invertor, form single phase alternating current (A.C.) output voltage by cascade; And every phase cascaded-output is connected to load through LC filter circuit after parallel connection respectively, form three-phase-single-phase invertor, its concrete connected mode is:
A, cutting transformer first side winding connect three phase mains, each phase voltage of secondary side winding is split as the individual independently low-voltage of n, for first-phase voltage, each independently low-voltage all connect with corresponding power unit module, the cascade successively of power unit module 11 to 1n output, namely the output negative terminal mouth 11N of power unit module 11 is connected with the output plus terminal mouth 12P of power unit module 12, the output negative terminal mouth 12N of power unit module 12 is connected with the output plus terminal mouth 13P of power unit module 13, by that analogy; In like manner, second and third phase voltage is identical with first-phase with power unit module connected mode.Output port after each phase power module cascade connection is respectively 11P and 1nN, 21P and 2nN, 31 and 3n;
B, output 11P, 21P, 31P end are connected to P point jointly, be connected with load or Traction networks anode after filtering LC filter circuit, output 1nN, 2nN, 3nN end is connected to N point jointly, is connected, realizes the parallel connection of three single phase alternating current (A.C.) output voltages with load or Traction networks negative terminal;
Described power unit module is single-phase-single-phase PWM converter.
2. cascade according to claim 1-mixing transformation device in parallel, it is characterized in that, it is characterized in that, described converter can be two level block, also can be many level block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510181639.9A CN104767393A (en) | 2015-04-17 | 2015-04-17 | Cascading-parallel connection mixing converter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510181639.9A CN104767393A (en) | 2015-04-17 | 2015-04-17 | Cascading-parallel connection mixing converter device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104767393A true CN104767393A (en) | 2015-07-08 |
Family
ID=53649062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510181639.9A Pending CN104767393A (en) | 2015-04-17 | 2015-04-17 | Cascading-parallel connection mixing converter device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104767393A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529713A (en) * | 2015-10-20 | 2016-04-27 | 许继电气股份有限公司 | Converter based on H-bridge back-to-back power modules |
| CN108306485A (en) * | 2018-02-26 | 2018-07-20 | 新风光电子科技股份有限公司 | A kind of generation method of tandem type high voltage transducer power unit pwm signal |
| CN109494731A (en) * | 2018-12-17 | 2019-03-19 | 成都智创利源科技有限公司 | A kind of through cophase supply system of attached wires of AC electrified railway |
| CN112448593A (en) * | 2019-08-27 | 2021-03-05 | 中车株洲电力机车研究所有限公司 | Traction converter system |
| CN112468007A (en) * | 2020-12-30 | 2021-03-09 | 深圳市永联科技股份有限公司 | Rectifier system based on multi-winding input |
| CN114204827A (en) * | 2022-01-10 | 2022-03-18 | 西南交通大学 | Non-isolated cascade two-phase-single-phase converter and railway traction power supply system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345483A (en) * | 2008-05-27 | 2009-01-14 | 北京先行电气有限公司 | Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation |
| CN101465606A (en) * | 2008-09-17 | 2009-06-24 | 刘建政 | Parallel-in converter for directly-driving wind power generation system |
| CN201584899U (en) * | 2009-08-06 | 2010-09-15 | 东南大学 | Topological structure of power electronic transformer |
| US20100314934A1 (en) * | 2007-12-12 | 2010-12-16 | Ralf Leiter | Electronic system for operating an electromechanical parking brake |
| CN103580057A (en) * | 2012-08-10 | 2014-02-12 | 盈威力新能源科技(上海)有限公司 | Three-phase grid-connected system for distributed photovoltaic power generation |
| US8848407B2 (en) * | 2011-04-18 | 2014-09-30 | Abb Technology Ag | Method in a voltage source chain-link converter, computer programs and computer program products |
| CN204578377U (en) * | 2015-04-17 | 2015-08-19 | 西南交通大学 | A kind of cascade-mixing transformation apparatus in parallel |
-
2015
- 2015-04-17 CN CN201510181639.9A patent/CN104767393A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100314934A1 (en) * | 2007-12-12 | 2010-12-16 | Ralf Leiter | Electronic system for operating an electromechanical parking brake |
| CN101345483A (en) * | 2008-05-27 | 2009-01-14 | 北京先行电气有限公司 | Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation |
| CN101465606A (en) * | 2008-09-17 | 2009-06-24 | 刘建政 | Parallel-in converter for directly-driving wind power generation system |
| CN201584899U (en) * | 2009-08-06 | 2010-09-15 | 东南大学 | Topological structure of power electronic transformer |
| US8848407B2 (en) * | 2011-04-18 | 2014-09-30 | Abb Technology Ag | Method in a voltage source chain-link converter, computer programs and computer program products |
| CN103580057A (en) * | 2012-08-10 | 2014-02-12 | 盈威力新能源科技(上海)有限公司 | Three-phase grid-connected system for distributed photovoltaic power generation |
| CN204578377U (en) * | 2015-04-17 | 2015-08-19 | 西南交通大学 | A kind of cascade-mixing transformation apparatus in parallel |
Non-Patent Citations (1)
| Title |
|---|
| 潘逸菎: "电力牵引机车用同相供电控制系统研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105529713A (en) * | 2015-10-20 | 2016-04-27 | 许继电气股份有限公司 | Converter based on H-bridge back-to-back power modules |
| CN108306485A (en) * | 2018-02-26 | 2018-07-20 | 新风光电子科技股份有限公司 | A kind of generation method of tandem type high voltage transducer power unit pwm signal |
| CN109494731A (en) * | 2018-12-17 | 2019-03-19 | 成都智创利源科技有限公司 | A kind of through cophase supply system of attached wires of AC electrified railway |
| CN112448593A (en) * | 2019-08-27 | 2021-03-05 | 中车株洲电力机车研究所有限公司 | Traction converter system |
| CN112468007A (en) * | 2020-12-30 | 2021-03-09 | 深圳市永联科技股份有限公司 | Rectifier system based on multi-winding input |
| CN114204827A (en) * | 2022-01-10 | 2022-03-18 | 西南交通大学 | Non-isolated cascade two-phase-single-phase converter and railway traction power supply system |
| CN114204827B (en) * | 2022-01-10 | 2023-03-14 | 西南交通大学 | Non-isolated cascade two-phase-single-phase converter and railway traction power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104767393A (en) | Cascading-parallel connection mixing converter device | |
| CN102859861B (en) | Configurable hybrid converter circuit | |
| CN108566072A (en) | Modular power system | |
| CN104410260A (en) | Fault-tolerance-capability-equipped MMC sub-module structure capable of realizing DC fault self-protection, and MMC modulation method thereof | |
| CN109067218B (en) | Solid-state transformer topology construction method based on multi-level sub-modules | |
| CN101645646A (en) | Method for realizing variable voltage level constant power output of converter | |
| CN103269083B (en) | Multi-terminal high-voltage direct-current power transmission system | |
| CN103620942A (en) | Converter | |
| CN102780416B (en) | Modularization-based multi-level converter flexible direct current transmission device and system thereof | |
| JP2012143104A (en) | Power conversion system | |
| CN103427657A (en) | High-voltage DC-DC conversion device | |
| CN106655794A (en) | Power electronic transformer and control method thereof | |
| CN103427653A (en) | High-voltage DC-DC conversion device | |
| CN103715930A (en) | Method for increasing capacity of flexible direct-current power transmission system and apparatus thereof | |
| CN103427652A (en) | High-voltage high-power DC-DC conversion device | |
| EP2621076B1 (en) | Multicell AC/DC power converter with isolated DC/DC converter stages | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| Umuhoza et al. | A SiC-based power electronics interface for integrating a battery energy storage into the medium (13.8 kV) distribution system | |
| CN106655850A (en) | Modular multilevel converter for eliminating low-frequency voltage fluctuation | |
| CN204392098U (en) | A kind of Monophase electric power electronic transformer and application system thereof | |
| CN203896199U (en) | Large-power high-efficiency energy-saving soft-melting power supply based on series-parallel type high-voltage frequency conversion technology | |
| CN204578377U (en) | A kind of cascade-mixing transformation apparatus in parallel | |
| Borgaonkar | Solid state transformers: A review of technology and applications | |
| CN201414072Y (en) | Converter with variable voltage-class constant power output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150708 |