CN106114293A - High-speed railway two-phase three wire system modular multi-level converter cophase supply system - Google Patents
High-speed railway two-phase three wire system modular multi-level converter cophase supply system Download PDFInfo
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- CN106114293A CN106114293A CN201610606204.9A CN201610606204A CN106114293A CN 106114293 A CN106114293 A CN 106114293A CN 201610606204 A CN201610606204 A CN 201610606204A CN 106114293 A CN106114293 A CN 106114293A
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- phase
- wire system
- port connects
- speed railway
- supply system
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
Abstract
The invention discloses a kind of high-speed railway two-phase three wire system modular multi-level converter cophase supply system, three-phase power grid voltage becomes α, β two phase voltage through three-phase biphase equilibrium transformator symmetry transformation, wherein α directly powers to Traction networks, three-wire system current transformer uses single stelliform connection topology configuration, one port connects β phase, another port connects α phase, and the 3rd port connects the biphase common port of α, β.Decreasing one group of switching tube brachium pontis and two groups of step-down isolation transformers compared with tradition back-to-back converter structure, this system can be directly accessed high-pressure system, it is achieved thereby that reduce converter device cost in the quantity reducing switching tube simultaneously.
Description
Technical field
The invention belongs to high-speed railway traffic transport industry, refer more particularly to a kind of how electric based on two-phase three wire system modularity
The high-speed railway cophase supply system of flat current transformer and control method.
Background technology
In electric railway, a kind of is that employing is high-power to the selection mode that high-speed railway traction substation is ideal
AC-DC-AC converter is carried out cophase supply scheme and is replaced existing phase changing type power supply plan, and the program solves electricity split-phase problem,
Meanwhile, the long-standing power quality problem of electric railway is solved.Wherein, the homophase constituted due to balance traction transformer
Power supply mode has the advantages such as converter structure is simple, desired volume is relatively small, has also carried out correlation engineering both at home and abroad at present
The experimental study of test.
The traditional cophase supply system constituted based on balance traction transformer is that the current transformer using back to back structure realizes
Cophase supply, needs the single-phase converter of two groups of back to back structure to constitute four switching tube branch roads and realizes.Wherein, about how
The research reducing converter device cost mainly has two kinds of thinkings: one is that symmetrical compensation principle expands to active cophase supply system
In system to the optimization of Converter Capacity thus reduce capacity and put into；Another kind is to apply new topology to reduce the quantity of switching tube.
Summary of the invention
In order on the premise of new topology application with reduce switching tube quantity method under reduce the cost of converter device,
The present invention proposes a kind of cophase supply system based on two-phase three wire system Modularized current transformer, and this system is directly accessed high pressure system
System, belongs to biphase electrical voltage system compared with three-phase collocation structure, simplifies structure, thus provides for reducing converter device cost
Technology guarantee.Its concrete means are:
High-speed railway two-phase three wire system modular multi-level converter cophase supply system, three-phase power grid voltage is through three
Phase-biphase equilibrium transformator symmetry transformation becomes α, β two phase voltage, and wherein α directly powers to Traction networks, and three-wire system current transformer uses
Single stelliform connection topology configuration, one port connects β phase, and another port connects α phase, and the 3rd port connects the biphase common port of α, β.
Use high-speed railway two-phase three wire system modular multi-level converter cophase supply system of the present invention, decrease two groups
High-voltage large-capacity step-down isolation transformer and a switch arm branch road, compensate system structure to conventional three-phase and simplify, reduce
Switching tube branch road quantity and cancel two groups of step-down transformers, provides technology to ensure for reducing converter device cost.
Use the structure of the cophase supply system of two-phase three wire system current transformer composition, with tradition back-to-back converter structure phase
Ratio decreases one group of switching tube brachium pontis and two groups of step-down isolation transformers, and this system can be directly accessed high-pressure system, thus real
Show the quantity reducing switching tube and reduce converter device cost simultaneously.
Accompanying drawing explanation
Fig. 1 is the homo-phase traction power supply system of the back-to-back two groups of current transformers of traditional single phase.
Fig. 2 is the homo-phase traction power supply system of two-phase three wire system current transformer.
Fig. 3 is negative phase-sequence and Harmonic currents detection block diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings apparatus and method of the present invention is described in further detail.
Fig. 1 is the homo-phase traction power supply system of traditional single phase back-to-back converter, and Fig. 2 is based on two-phase three wire system modularity
The cophase supply system construction drawing of Multilevel Inverters.As it is shown in figure 1, three-phase power grid voltage is through three-phase-biphase equilibrium transformation
Device symmetry transformation becomes α, β two phase voltage, and wherein α directly powers to Traction networks, and β is through single-phase back-to-back converter (PFC) and two
Group step-down transformer (T) transmits certain power to Traction networks.Intermediate DC link is connected to jumbo high-voltage capacitor group.
The embodiment of the present invention as in figure 2 it is shown, three-phase power grid voltage through three-phase-biphase equilibrium transformator symmetry transformation become α,
After β two phase voltage, wherein α directly directly powers to Traction networks, and one port of three-wire system current transformer connects β phase, another port
Connecing α phase, the 3rd port meets the biphase common port n of α, β, uses single stelliform connection topology configuration, this level every by n submodule
Constitute.
The Detection & Controling method of negative-sequence current and harmonic wave instruction current is seen Fig. 3, by the three-phase electricity that will detect
Stream changes into real component and idle component through coordinate transform, does corresponding inverse transformation again, i.e. after low-pass filtered device (LPF)
Available harmonic wave and negative-sequence current.
In Fig. 3, LPF is low pass filter；PLL is phaselocked loop.For single-phase circuit, use ip-iqDetection method, through low pass
Will exchange real component i after wave filter (LPF)pWith exchange idle component iqFilter, directly obtain direct current and gain merit and idle component,
After doing corresponding inverse transformation again, obtain fundamental current.Again from electric current iL(t)In deduct fundamental current, i.e. can detect that harmonic wave and negative phase-sequence
Electric current.
The organization plan of the present invention, electric current detecting method, ultimate principle and the present invention excellent has more than been shown and described
Point, skilled person will appreciate that of the industry, the present invention is not restricted to the described embodiments, and above-described embodiment and description describe
The simply organization plan of the present invention, control method and ultimate principle, without departing from the spirit and scope of the present invention, this
Invention also has various changes and modifications, and these changes and improvements both fall within the range of claimed invention, the present invention
Claimed scope is defined by appended claims and equivalence thereof.
Claims (2)
1. a high-speed railway two-phase three wire system modular multi-level converter cophase supply system, it is characterised in that current transformer
Three groups of switch brachium pontis constitute two-phase three wire system, and three-phase power grid voltage becomes α, β two through three-phase-biphase equilibrium transformator symmetry transformation
Phase voltage, wherein α directly powers to Traction networks, and three-wire system current transformer uses single stelliform connection topology configuration, and one port connects β phase,
Another port connects α phase, and the 3rd port connects the biphase common port of α, β.
High-speed railway two-phase three wire system modular multi-level converter cophase supply system the most according to claim 1, its
Being characterised by, current transformer uses modular multilevel structure, and each brachium pontis is made up of n submodule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610606204.9A CN106114293B (en) | 2016-07-28 | 2016-07-28 | Two-phase three-wire system modular multilevel converter in-phase power supply system of high-speed railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610606204.9A CN106114293B (en) | 2016-07-28 | 2016-07-28 | Two-phase three-wire system modular multilevel converter in-phase power supply system of high-speed railway |
Publications (2)
| Publication Number | Publication Date |
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| CN106114293A true CN106114293A (en) | 2016-11-16 |
| CN106114293B CN106114293B (en) | 2020-02-21 |
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| CN201610606204.9A Active CN106114293B (en) | 2016-07-28 | 2016-07-28 | Two-phase three-wire system modular multilevel converter in-phase power supply system of high-speed railway |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244947A (en) * | 2020-02-27 | 2020-06-05 | 荣信汇科电气技术有限责任公司 | Novel cophase power supply device |
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| CN201077368Y (en) * | 2007-10-22 | 2008-06-25 | 西南交通大学 | Electrified railroad homophase traction power supply system |
| CN101746282A (en) * | 2010-03-12 | 2010-06-23 | 西南交通大学 | Electrified railroad through power supply system without split phase |
| GB2474056A (en) * | 2009-10-05 | 2011-04-06 | Davor Vujatovic | Parallel single phase AC power supply arrangements |
| CN103895534A (en) * | 2014-02-28 | 2014-07-02 | 株洲变流技术国家工程研究中心有限公司 | Double-current system traction power supply system based on modularized multi-level current converter |
| CN104009657A (en) * | 2014-04-29 | 2014-08-27 | 株洲变流技术国家工程研究中心有限公司 | DC traction power supply device |
| CN205905821U (en) * | 2016-07-28 | 2017-01-25 | 西华大学 | High -speed railway two phase three wire system modularization multi -level converter cophase power supply system |
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2016
- 2016-07-28 CN CN201610606204.9A patent/CN106114293B/en active Active
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| CN201077368Y (en) * | 2007-10-22 | 2008-06-25 | 西南交通大学 | Electrified railroad homophase traction power supply system |
| GB2474056A (en) * | 2009-10-05 | 2011-04-06 | Davor Vujatovic | Parallel single phase AC power supply arrangements |
| CN101746282A (en) * | 2010-03-12 | 2010-06-23 | 西南交通大学 | Electrified railroad through power supply system without split phase |
| CN103895534A (en) * | 2014-02-28 | 2014-07-02 | 株洲变流技术国家工程研究中心有限公司 | Double-current system traction power supply system based on modularized multi-level current converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244947A (en) * | 2020-02-27 | 2020-06-05 | 荣信汇科电气技术有限责任公司 | Novel cophase power supply device |
| CN111244947B (en) * | 2020-02-27 | 2021-12-28 | 荣信汇科电气股份有限公司 | Novel cophase power supply device |
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| CN106114293B (en) | 2020-02-21 |
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