CN105870926A - Novel alternating-current and direct-current hybrid tractive power supply system - Google Patents
Novel alternating-current and direct-current hybrid tractive power supply system Download PDFInfo
- Publication number
- CN105870926A CN105870926A CN201610294511.8A CN201610294511A CN105870926A CN 105870926 A CN105870926 A CN 105870926A CN 201610294511 A CN201610294511 A CN 201610294511A CN 105870926 A CN105870926 A CN 105870926A
- Authority
- CN
- China
- Prior art keywords
- power supply
- current
- phase
- supply system
- alternating current
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
-
- 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
-
- 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
- H02M5/02—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 without intermediate conversion into dc
- H02M5/04—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 without intermediate conversion into dc by static converters
- H02M5/22—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 without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- 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
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
Abstract
The invention discloses a novel alternating-current and direct-current hybrid tractive power supply system. The novel alternating-current and direct-current hybrid tractive power supply system comprises a step-down transformer and a converter. The converter is connected to the secondary side of the step-down transformer, and each bridge arm of the converter is composed of a circuit of N H bridges. Each H bridge comprises S1, S2, S3 and S4, wherein S1 is connected with S4 in series, S2 is connected with S3 in series, and then the two series structures are connected in parallel. A control circuit of the converter is formed by connecting an SVG1 circuit and an SVG2 circuit in parallel, wherein the SVG1 circuit and the SVG2 circuit are of the same structure. By adopting the same power supply, output of single-phase alternating current from three-phase alternating current is achieved, and output of direct current from three-phase alternating current is achieved.
Description
Technical field
The present invention relates to tractive power supply system field, a kind of novel alternating current-direct current mixing tractive power supply system.
Background technology
Electric railway can be divided into unidirectional current gasification railway and attached wires of AC electrified railway according to network planning.DC system is applicable to city rail
Traffic and freight volume is less, equidistant short, the application scenario that load is light of intercity main line railway based on passenger traffic, it is possible to play it structurally simple, economical
The advantage of better performances.At present, City Rail Transit System (such as subway, light rail) uses 1500Vdc/750Vdc to power；Attached wires of AC electrified ferrum
Road uses 27.5kV/50Hz single-phase ac power supply, and compared with direct current supply mode, alternating supply voltage is higher, through-put power is big, is widely used in
Main line electric railway.
Along with domestic main line electric railway and the development of urban track traffic, subway, light rail or locomotive inevitably occur at AC and DC
The situation of electric railway circuit movement across lines.And for main engine plants, if produce the locomotive of Alternating Current Power Supply and the direct current supply of each electric pressure simultaneously
Light rail or railcar, if not only having established diplomatic relations streamline when making a service test these vehicles but also having built AC line, add cost undoubtedly.
Patent publication No. is to mention a kind of multi-functional mixing tractive power supply system in CN104022630A, and its primary structure is as shown in Figure 1.This
Bright multi-functional mixed type tractive power supply system, including step-down transformer, tractive transformer, DC/DC changer, primary cut-out group with keep apart
Pass group.This invention electric power system both can export the power supply (1500Vdc) needed for city rail vehicle, it is also possible to needed for exporting high-speed electrified vehicle
Power supply (27.5KV/50Hz).Patent publication No. is to mention a kind of direct-current traction power supply device, its primary structure such as figure in CN104009657A
Shown in 2.This invention electric supply installation, including the step-down transformer being sequentially connected with, MMC module, division module and DC/DC voltage transformation module.
This invention device, realizes direct-current traction power supply while not changing alternating current traction electric network composition.
The shortcoming of prior art: electric power system shown in Fig. 1, its direct current and alternating current traction part use independently-powered mode, and this increases undoubtedly
Oil (gas) filling device manufacturing cost.The changer of direct current supply have employed multilevel converter (MMC) and DC/DC changer, i.e. AC/DC add DC/DC
The pattern of conversion, this increases the complexity of system undoubtedly so that the probability broken down of system improves, and system cost also increases.Figure
DC traction power-supply system shown in 2, although do not change the structure of former alternating current traction electrical network, but carry out DC/DC after using multiple capacitance partial pressure again
The structure of conversion, this can make the complexity of system improve, stability reduction, and these DC/DC modules need to work simultaneously, if the most a certain module
Damage, the equal cisco unity malfunction of the most whole equipment；And system cost also increases.
Summary of the invention
It is an object of the invention to provide a kind of novel alternating current-direct current mixing tractive power supply system, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme: a kind of novel alternating current-direct current mixing tractive power supply system, including downconverter
Device and inverter, described inverter is connected to the secondary side of step-down transformer, and each brachium pontis of inverter is made up of N number of H-bridge circuit, described H bridge
Including S1, S2, S3 and S4, described S1 with S4 connects, described S2 and S3 connect, then by the most in parallel for the two cascaded structure, described in change
The control circuit of stream device is made up of two completely identical in structure SVG1 and SVG2 circuit in parallel.
Preferably, the primary side of described step-down transformer by tractive transformer corresponding with outfan connect, and the secondary side of step-down transformer and
SVG1 and SVG2 circuit it is in series with between outfan.
Preferably, the B phase ground connection of the secondary side of described step-down transformer, A phase and C phase are all connected with outfan by tandem tap, and drop
It is in series with SVG1 and SVG2 circuit between secondary side and the outfan of pressure transformer.
Preferably, described SVG1 is made up of three H bridges, and brachium pontis one end of H bridge is connected with one end of direct-flow positive pole or single phase ac, another
End couples together compositions respectively with three-phase voltage source A, B, C, described SVG2 unit be by brachium pontis one end of three H bridges and direct current negative pole or
The other end of single phase ac couples together, and the other end couples together composition respectively with three-phase voltage A, B, C.
Preferably, the span of described N is N ＞ 1, and N is integer.
Compared with prior art, the invention has the beneficial effects as follows: this novel alternating current-direct current mixing tractive power supply system principle is simple, and the present invention is not
Change under the structure of existing alternating current traction power supply network, three-phase alternating-current supply output after blood pressure lowering, AC/DC conversion or AC/AC conversion is suitable for
The 27.5kV/50Hz alternating current of main line electric railway system power supply it is applicable in the 1500V/750V unidirectional current of urban rail system power supply or output,
Realize the alternating current-direct current hybrid power supply to trailer system, it is also possible to be applied to other supplied by AC/DC electricity occasion, applied widely, traction power supply of the present invention
Device, solves the reunification of alternating current-direct current test wire of main engine plants, thus realizes subway and double-current system time high-speed electric railway integrates with is powered, and
Can reduce substantial amounts of repeated construction, to avoid the wasting of resources, effectively to reduce investment outlay cost and quantities, the present invention is by using modular multilevel
Inverter carries out AC/DC conversion, AC/AC conversion, substituted for the tractive transformer in tradition electric power system and Rectification Power Factor, decreases occupation of land face
Long-pending, it is possible to effectively to reduce harmonic content, improve system power factor, apparatus of the present invention use the realization of MMC structure by alternating current to alternating current, directly
The conversion of stream electricity, it is possible to widen input voltage and output current scope flexibly and improve equipment dependability, also can solve simultaneously Traction networks three-phase equilibrium,
The series of problems such as power factor and harmonic wave, it is ensured that power supply reliability, the output voltage waveforms quality of apparatus of the present invention is high, owing to MMC is the most electric
Flat number is a lot, and the voltage ladder ripple exported has been in close proximity to sine wave, and waveform quality is high, and each harmonic containing ratio and total harmonic distortion factor are low,
The troubleshooting capability of apparatus of the present invention is strong.Due to the redundancy properties of the submodule of MMC, fault submodule directly can be excised from inverter,
Ensureing power supply reliability, the utilization rate of apparatus of the present invention is higher, can power at direct-current traction power supply and single-phase AC traction and mutually cut between two states
Changing, the switching between two states, without changing hardware arrangement, only need to change corresponding control strategy, and the overall efficiency of apparatus of the present invention is higher.
When input voltage and output voltage differ bigger, can by the way of excision module, make module in work with higher efficiency output, with
Improve overall efficiency.
Accompanying drawing explanation
Fig. 1 is the mixing tractive power supply system schematic diagram mentioned in patent CN104022630A；
Fig. 2 is the direct-current traction power supply schematic diagram of device mentioned in patent CN104009657A；
Fig. 3 is circuit theory diagrams of the present invention；
Fig. 4 is H-bridge circuit figure；
Fig. 5 is SVG1 and SVG2 circuit theory diagrams；
Fig. 6 is embodiment two circuit theory diagrams；
Fig. 7 is embodiment three-circuit schematic diagram.
Accompanying drawing illustrates: 1 step-down transformer, 2 tractive transformers, 3DC/DC changer, 4H bridge, 5SVG1,6SVG2.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that
Described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under not making creative work premise, broadly falls into the scope of protection of the invention.
Embodiment one
Referring to Fig. 3,4,5, the present invention provides a kind of technical scheme: a kind of novel alternating current-direct current mixing tractive power supply system, including blood pressure lowering change
Depressor 1 and inverter, inverter is connected to the secondary side of step-down transformer 1, and each brachium pontis of inverter is made up of N number of H bridge 4 circuit, N's
Span is N ＞ 1, and N is integer, and H bridge 4 includes that S1, S2, S3 and S4, S1 with S4 connect, S2 and S3 connects, then by this
Two cascaded structures are the most in parallel, and the control circuit of inverter is made up of two completely identical in structure SVG1 and SVG2 circuit in parallel, SVG1 by
Three H bridges 4 are constituted, and brachium pontis one end of H bridge 4 is connected with one end of direct-flow positive pole or single phase ac, the other end respectively with three-phase voltage source A,
B, C couple together composition, and three brachium pontis both end voltage are respectively Vau, Vbu, Vcu；SVG2 unit is by brachium pontis one end of three H bridges 4
Coupling together with the other end of direct current negative pole or single phase ac, the other end couples together composition respectively with three-phase voltage A, B, C, three brachium pontis
Both end voltage is respectively Vad, Vbd, Vcd；The three-phase power grid voltage of input is Ua, Ub, Uc, and multilevel converter is connected to step-down transformer
Secondary side, convert out for AC/DC or AC/AC and be applicable to the 1500V/750V unidirectional current of urban rail system power supply or output is applicable to main line
The 27.5KV/50Hz alternating current of electric railway system power supply, simultaneously turns on S1 and S3 or simultaneously turns on S2 and S4, so that it may two brachium pontis it
Between the contrary level of polarization, simultaneously turn on S1 and S2 or simultaneously turn on S3 and S4, then exporting zero level, for cascaded H-bridges 4 unsteady flow
Device, the relation between level number m contained by series unit number n and output waveform is: m=2n+1.After inverter minimum unit uses H bridge 4 module,
Only by the switching of control mode, the most exportable DC voltage, it is possible to output single-phase alternating voltage, in A phase, brachium pontis both end voltage is Vau, lower end
Voltage is Vad.Upper end reactor current is iau, and lower end reactor current waveform is iad.Positive terminal voltage Udc+ of direct current or UAC1, direct current is born
Terminal voltage is Udc-or UAC2, show that A circuitry phase equation is as follows.
Brachium pontis uses full-bridge cascade form, so formula bridge arm output voltage polarity can be in positive negative regulator.Expression formula describes reactor
Electric current and the relation of bridge arm voltage.According to this relational expression, regulate brachium pontis output voltage, control the electric current on reactor.And then control power at three-phase
Flow between AC and DC side or single phase ac side, when DC side or single phase ac side voltage are less than set-point, control power to DC side or single-phase
AC flows, and when DC side or single phase ac side voltage height, controls power and moves to three-phase alternating current effluent.
Embodiment two
Referring to Fig. 4,5,6, the present embodiment other technologies feature is identical with embodiment one, and its difference is: the primary side of step-down transformer 1
Connect by tractive transformer 2 is corresponding with outfan, and between the secondary side of step-down transformer 1 and outfan, be in series with SVG1 and SVG2 electricity
Road, the input of inverter is the outfan of traction substation, and inverter power supply mainly completes the three-phase alternating current conversion to direct current, power demand unit
Less, thus reduce the complexity of control algolithm, improve the stability of system in a sense, when without the operating mode of direct current supply,
Inverter power supply in the present embodiment can also be used for reactive-load compensation and uses.
Embodiment three
Referring to Fig. 5,6,7, the present embodiment other technologies feature is identical with embodiment one, and its difference is: the secondary side of step-down transformer 1
B phase ground connection, A phase and C phase are all connected with outfan by tandem tap, and are in series with between the secondary side of step-down transformer 1 and outfan
SVG1 and SVG2 circuit, the input in the present embodiment is the outfan of tractive transformer, and the inverter power supply in the present embodiment mainly completes three
Intersect and flow to direct current or the conversion of single-phase high voltage exchange, when three-phase alternating current becomes single phase ac, meet the cophase supply of main line electric railway simultaneously
Requirement, the shortcoming that compensate for original single-phase uneven power supply completely, the most another kind of mode of operation inverter power supply only completes three-phase alternating current to direct current
Conversion, when being switched to original transformator single-phase ac power supply pattern, inverter power supply also be used as reactive-load compensation use.
In sum: embodiment one is used same set of power supply, not only achieve three-phase alternating current and become single phase ac output, and achieve three-phase alternating current
Inversion of direct current exports；Embodiment two both can complete the three-phase alternating current conversion to direct current, it is also possible to make traction substation when not having subway train to run
Reactive power compensator use；Embodiment three both can complete the three-phase alternating current conversion to direct current, it is also possible to complete three-phase alternating current to single phase ac
Conversion, meets the cophase supply requirement of main line electric railway, the shortcoming that compensate for original single-phase uneven power supply completely, embodiment three another
A kind of mode of operation is similar with embodiment two, only completes the three-phase alternating current conversion to direct current, makees the nothing of traction substation when not having subway train to run
Reactive power compensation installations uses.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, it is possible to understand that without departing from the present invention
Principle and spirit in the case of these embodiments can be carried out multiple change, revise, replace and modification, the scope of the present invention is wanted by appended right
Ask and equivalent limits.
Claims (5)
1. a novel alternating current-direct current mixing tractive power supply system, including step-down transformer (1) and inverter, it is characterised in that: the described change of current
Device is connected to the secondary side of step-down transformer, and each brachium pontis of inverter is made up of N number of H bridge (4) circuit, described H bridge (4) include S1, S2,
S3 and S4, described S1 with S4 connect, and described S2 and S3 connects, then by the most in parallel for the two cascaded structure, and the control electricity of described inverter
It route two completely identical in structure SVG1 (5) and SVG2 (6) circuit in parallel is constituted.
A kind of novel alternating current-direct current mixing tractive power supply system the most according to claim 1, it is characterised in that: described step-down transformer (1)
Primary side by tractive transformer (2) connection corresponding with outfan, and be in series with SVG1 between secondary side and the outfan of step-down transformer (1)
And SVG2 (6) circuit (5).
A kind of novel alternating current-direct current mixing tractive power supply system the most according to claim 1, it is characterised in that: described step-down transformer (1)
The B phase ground connection of secondary side, A phase and C phase be all connected with outfan by tandem tap, and the secondary side of step-down transformer (1) and output
SVG1 (5) and SVG2 (6) circuit it is in series with between end.
4. according to a kind of novel alternating current-direct current mixing tractive power supply system described in claim 1 or 2 or 3, it is characterised in that: described SVG1
(5) being made up of three H bridges (4), brachium pontis one end of H bridge (4) is connected with one end of direct-flow positive pole or single phase ac, the other end respectively with
Three-phase voltage source A, B, C couple together composition, described SVG2 (6) unit be the brachium pontis one end by three H bridges (4) with direct current negative pole or
The other end of person's single phase ac couples together, and the other end couples together composition respectively with three-phase voltage A, B, C.
5. according to a kind of novel alternating current-direct current mixing tractive power supply system described in claim 1 or 2 or 3, it is characterised in that: described N takes
Value scope is N ＞ 1, and N is integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294511.8A CN105870926A (en) | 2016-05-05 | 2016-05-05 | Novel alternating-current and direct-current hybrid tractive power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294511.8A CN105870926A (en) | 2016-05-05 | 2016-05-05 | Novel alternating-current and direct-current hybrid tractive power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105870926A true CN105870926A (en) | 2016-08-17 |
Family
ID=56630322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610294511.8A Pending CN105870926A (en) | 2016-05-05 | 2016-05-05 | Novel alternating-current and direct-current hybrid tractive power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105870926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532572A (en) * | 2019-01-09 | 2019-03-29 | 西南交通大学 | A kind of five rail electric power supply control system of short stator magnetic-levitation train |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011126370A (en) * | 2009-12-16 | 2011-06-30 | Kawasaki Heavy Ind Ltd | Power supply system and power supply method |
| CN103326301A (en) * | 2013-06-24 | 2013-09-25 | 西南交通大学 | System and method for electrified railway overhead line online ice resistance |
| 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 |
| CN104022630A (en) * | 2014-04-29 | 2014-09-03 | 株洲变流技术国家工程研究中心有限公司 | Multifunctional hybrid traction power supply system and control method |
| CN104029610A (en) * | 2014-04-30 | 2014-09-10 | 西南交通大学 | Continuous type traction power supply system based on multilevel converters connected in parallel |
-
2016
- 2016-05-05 CN CN201610294511.8A patent/CN105870926A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011126370A (en) * | 2009-12-16 | 2011-06-30 | Kawasaki Heavy Ind Ltd | Power supply system and power supply method |
| CN103326301A (en) * | 2013-06-24 | 2013-09-25 | 西南交通大学 | System and method for electrified railway overhead line online ice resistance |
| 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 |
| CN104022630A (en) * | 2014-04-29 | 2014-09-03 | 株洲变流技术国家工程研究中心有限公司 | Multifunctional hybrid traction power supply system and control method |
| CN104029610A (en) * | 2014-04-30 | 2014-09-10 | 西南交通大学 | Continuous type traction power supply system based on multilevel converters connected in parallel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532572A (en) * | 2019-01-09 | 2019-03-29 | 西南交通大学 | A kind of five rail electric power supply control system of short stator magnetic-levitation train |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206698126U (en) | A kind of hauling power device | |
| CN103895534B (en) | Double-current system traction power supply system based on modularized multi-level current converter | |
| CN208675119U (en) | A kind of high-power ac-dc conversion power supply | |
| CN104009657A (en) | DC traction power supply device | |
| CN102394557A (en) | Hybrid parallel type high-voltage direct current traction power supply current transformer and control method thereof | |
| CN105790598A (en) | Highly-reliable main circuit topological structure of railway ground deflector | |
| CN102624258A (en) | Non-isolated symmetric self-coupling 18-pulse rectification power supply system | |
| CN104022630B (en) | A kind of multi-functional mixed type tractive power supply system and control method | |
| CN101795080A (en) | Three-phase power electronics transformer for power distribution | |
| CN102291007A (en) | Cophase power supply system for cascade output-free transformer | |
| CN104786872A (en) | Cut-through type cophase power supply system for cascaded input-free and output-free transformers | |
| CN107070255A (en) | A kind of hauling power device | |
| CN104393614A (en) | Modularized multi-level dual-current traction power supply and purification system | |
| CN104935182A (en) | Transformer used for three-level traction current transformer | |
| CN109367398A (en) | DC auxiliary power system | |
| CN113890122A (en) | Alternating current-direct current multiport power distribution system for office residential area | |
| Wang et al. | High voltage DC auto-transformer traction power supply for braking energy utilization, rail potential, and stray current mitigation | |
| CN208835750U (en) | A kind of comprehensive direct current system | |
| Farhangi et al. | A novel vehicular integrated power system realized with multi-port series ac link converter | |
| Lopatkin et al. | Bi-directional high-voltage DC-DC-converter for advanced railway locomotives | |
| CN104410061A (en) | Cascade double-star-type DC powering and electric energy quality improving system for traction power supply | |
| Ferencz et al. | Converter topologies for MVDC traction transformers | |
| CN104037754B (en) | A kind of modular multi-level flexible direct current topological circuit being applicable to fault traversing | |
| CN106992534A (en) | A kind of Modularized parallel redundant railway power line cleaner | |
| CN209982353U (en) | Non-power frequency transformer structure of AC-DC-AC substation with through same-phase power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into 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: 20160817 |