CN104935168A - Multifunctional transformer used for traction transmission system - Google Patents
Multifunctional transformer used for traction transmission system Download PDFInfo
- Publication number
- CN104935168A CN104935168A CN201410103966.8A CN201410103966A CN104935168A CN 104935168 A CN104935168 A CN 104935168A CN 201410103966 A CN201410103966 A CN 201410103966A CN 104935168 A CN104935168 A CN 104935168A
- Authority
- CN
- China
- Prior art keywords
- high frequency
- transformer
- traction
- stage assembly
- voltage
- 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.)
- Granted
Links
Abstract
The invention discloses a multifunctional transformer used for a traction transmission system. The multifunctional transformer comprises a high-voltage stage assembly connected into a traction network, wherein n stages of identical bridge-type power sub-modules are cascaded to form the high-voltage stage assembly; an isolation stage assembly, wherein the isolation stage assembly comprises more than one high-frequency modulation circuit and more than one high-frequency transformer, the high-frequency modulation circuits modulate a direct voltage converted by the high-voltage stage assembly into a high-frequency square-wave voltage, and the high-frequency square-wave voltage is coupled to two windings on a secondary side through the high-frequency transformers and is sent to an output stage assembly; and the output stage assembly, wherein the output stage assembly comprises a high-frequency H-bridge rectification circuit and restores the high-frequency square-wave voltage coupled by the high-frequency transformers to a high quality direct voltage for output, and the high quality direct voltage is output for providing energy to a traction inverter and an auxiliary inverter. According to the invention, the weight of a train is reduced, the size of the train is reduced, the vehicle operation performance and the rail capacity are improved, and the power grid electric energy quality and the electric energy utilization rate are increased.
Description
Technical field
The present invention is mainly concerned with locomotive traction technical field, refers in particular to one and is applicable to electric locomotive, the Multifunction transformer of the traction drives such as motor train unit.
Background technology
In electric locomotive, in the traction drives such as motor train unit, traction transformer is the single phase industrial frequence transformer of the many secondary in single former limit.The volume and weight of main transformer is huge, and to locomotive, particularly the space utilization of motor train unit and high-speed cruising have a certain impact.Meanwhile, train, when braking, will produce a large amount of braking energies, if braking energy can not get effective utilization, Traction networks capacity usage ratio not only can be made low, and braking energy can make the abnormal rising of supply conductor voltage, causes device damage.The undue phase time of train, needs power-off, relies on train inertia to spend non-Electric region.After arriving electric region, more again close a floodgate.Like this, train just has speed loss.
As shown in Figure 1, the Industrial Frequency Transformer of conventional electric power locomotive the alternating voltage of 25kV is dropped to traction electric machine and other vehicle mounted electrical apparatus work the electric pressure that is applicable to, wherein the vice-side winding of main transformer is powered to four-quadrant rectifying device, and auxiliary winding powers to auxiliary variable power source.Four-quadrant rectifying device converts power frequency ac voltage to direct voltage, and then direct current is supplied to traction invertor driving traction electric machine.Because modern train is just towards multiple unit train future development, pulling equipment is no longer installed concentratedly on locomotive, but dispersion is arranged in the compartment of train.Like this, main transformer, the design of size to locomotive of the volume and weight of four-quadrant rectifying device has a great impact.In order to improve power and the speed of train, improving and increasing handling capacity of passengers, the volume and weight reducing pulling equipment has just become designer to need the main target considered;
The design of size to locomotive of the volume and weight of main transformer has a great impact, and particularly in the EMU of power decentralized, because the braking power of the traction power that requires and feedback is large, weight will directly affect the speed-raising of train; Simultaneously because the pulling equipment of disperse power is no longer installed concentratedly on locomotive, but dispersion is arranged in the compartment of train, bulkyly will increase the design difficulty of train, reduces handling capacity of passengers.Meanwhile, the braking energy of train can not effectively utilize the efficiency reducing Traction networks electric energy.The undue phase time of train, also there is speed loss in train.Therefore, on the basis of improving Traction networks utilization rate of electrical and train speed, the weight and volume reducing main transformer has become the main target of designer.
As from the foregoing, the advantages such as existing industrial frequency traction transformer has simply, reliability is high, cheap.But it also has the following obvious shortcoming:
(1) volume and weight is large, and affect handling capacity of passengers and the high speed performance of train, particularly in the motor train unit of power decentralized, the restriction of installing space makes the impact of volume of transformer and weight particularly outstanding;
(2) output voltage of Industrial Frequency Transformer can change along with the change of load, and falling of output voltage can control to bring difficulty to transmission;
(3) Industrial Frequency Transformer is at undue phase time, needs power-off, and traction convertor is out of service; That is, the undue phase time of modern train, needs power-off, relies on train inertia to spend non-Electric region.After arriving electric region, more again close a floodgate.Like this, train just has speed loss;
(4) Industrial Frequency Transformer need use cold oil, easily gives environment.
(5) train is when braking, and will produce very large feedback energy, if braking energy can not get effective utilization, Traction networks capacity usage ratio not only can be made low, and braking energy can make the abnormal rising of supply conductor voltage, causes device damage.
Summary of the invention
The technical problem to be solved in the present invention is just: the technical problem existed for prior art, the invention provides one can alleviate the weight of train, reduce train volume, improve vehicle operating performance and railway transportation capability, the raising electrical network quality of power supply and utilization rate of electrical, alleviate the Multifunction transformer for traction drive of control system burden.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
For a Multifunction transformer for traction drive, comprising:
Hiigh pressure stage assembly, is linked in Traction networks; Described hiigh pressure stage assembly adopts the identical bridge power sub module cascade of n level to form;
Isolation level assembly, comprise more than one high frequency modulated circuit and more than one high frequency transformer, the direct voltage that hiigh pressure stage component transform is come is modulated into high frequency square wave voltage by high frequency modulated circuit, then is coupled to two windings on time limit by high frequency transformer, gives output stage assembly;
Output stage assembly, comprises high frequency H bridge rectification circuit, and the high frequency square wave of coming being coupled by high frequency transformer is reduced into the direct voltage output of high-quality, provides energy to traction invertor, subordinate inverter.
As a further improvement on the present invention: described hiigh pressure stage assembly is linked in the railway traction net of alternating voltage 25kV by connecting reactance L, described bridge power submodule adopts H bridge module, each described H bridge module in parallel the electric capacity of identical capacity, the alternating voltage that self bears by described H bridge module is transformed into the direct voltage at electric capacity two ends.
As a further improvement on the present invention: described high frequency modulated circuit adopts H bridge full bridge structure, isolating transformer height electronegative potential is used for.
As a further improvement on the present invention: each described high frequency transformer adopts time limit double winding pattern, the corresponding one group of high frequency H bridge rectification circuit of each winding; Then, by high frequency H bridge rectification output-parallel corresponding for each high frequency transformer secondary first, limit winding together, the input of first traction invertor is formed; High frequency H bridge rectification output-parallel corresponding to each described high frequency transformer time second, limit winding together, forms the input of second traction invertor.By the ingehious design of circuit topology, make the submodule power output on hiigh pressure stage assembly keep balance, reduce control system to the difficulty of cascade submodule voltage balancing control, alleviate control system burden.
As a further improvement on the present invention: described output stage assembly is also connected with super capacitor storage unit, when motor braking, described super capacitor storage unit absorbs the energy of traction invertor feedback; When output stage is under-voltage or decompression time, the described super capacitor storage unit short time provides energy to traction invertor and AuCT.
As a further improvement on the present invention: described super capacitor storage unit comprises a bidirectional DC-DC converter, a filter inductance L and supercapacitive cell, is connected with the positive pole "+" of output stage assembly by bidirectional DC-DC converter with negative pole "-".
As a further improvement on the present invention: described bidirectional DC-DC converter is IGBT half-bridge structure.
Compared with prior art, the invention has the advantages that:
(1) Multifunction transformer for traction drive of the present invention, based on electronic power transformer technology, substantially reduce the volume and weight of pulling equipment, improve the transport power of train and the capacity usage ratio of Traction networks, achieve the utility power quality control of Traction networks side and the two-way flow of energy.
(2) Multifunction transformer for traction drive of the present invention, can absorb the braking energy of train, reduces the speed loss that phase-splitting crossed by train, improves the transport power of train and the capacity usage ratio of Traction networks.
(3) the present invention can not only realize drawing the traction of electric power electric transformer, and the conventional func such as utility power quality control, can also realize power self-balancing only by the mode of circuit topology, energy feedback and without the need to too equal function of slowing down.
Accompanying drawing explanation
Fig. 1 is traditional traction convertor power supply the principle schematic diagram.
Fig. 2 is the principle schematic of the present invention in embody rule example.
Fig. 3 is the principle schematic of H bridge power model (SM) in the present embodiment.
Fig. 4 is the principle schematic of super capacitor storage unit in the present embodiment.
Embodiment
Below with reference to Figure of description and specific embodiment, the present invention is described in further details.
Multifunction transformer for traction drive of the present invention is based on electronic power transformer technology; As shown in Figure 2, have particular application as example with transformer belt two traction electric machines, this transformer comprises:
Hiigh pressure stage assembly, is linked in the railway traction net of alternating voltage 25kV by connecting reactance L, and adopt identical bridge power submodule (SM1-SMn, the Submodule) cascade of n level to form, the circuit diagram of its power modules SM as shown in Figure 3; Each H bridge in parallel the electric capacity (C1-Cm) of identical capacity, electric capacity has the effect of energy storage and filtering.The alternating voltage that self bears by H bridge module is transformed into the direct voltage at electric capacity two ends.H bridge cascaded topology can not only the electric pressure of lifting device, makes up the defect of single power model rank deficient, can also be controlled by phase-shifting carrier wave PWM, improve the equivalent switching frequency of device, control power factor and the harmonic wave of Traction networks side.
Isolation level assembly, be made up of high frequency modulated circuit (SMn+1 – SM2n) and single-phase limit double winding high frequency transformer (T1-Tn), hiigh pressure stage is converted the direct voltage of coming and is modulated into high frequency square wave voltage by high frequency modulated circuit, again by transformer coupled two windings to time limit of single-phase high frequency, give output stage.High frequency modulated circuit adopts H bridge full bridge structure, can realize the two-way flow of energy.Electric power electric transformer height electronegative potential is mainly isolated in the effect of high frequency transformer, ensures the safety of whole circuit, also serves the effect of step-down simultaneously, achieves the transmission of energy.
Output stage assembly, comprises high frequency H bridge rectification circuit, and will be reduced into the direct voltage output of high-quality by the transformer coupled high frequency square wave of coming of single-phase high frequency, to traction invertor, subordinate inverter and energy storage device provide energy.Because output stage assembly adopts full-controlled rectifier, the two-way flow of energy also can be realized.Respectively disperse the balance of submodule capacitor voltage in order to hiigh pressure stage can be realized, each high frequency transformer is adopted time limit double winding pattern, the corresponding one group of high frequency H bridge rectification circuit of each winding.Then, by high frequency H bridge rectification output-parallel corresponding for each high frequency transformer secondary first, limit winding together, the input of first traction invertor is formed; High frequency H bridge rectification output-parallel corresponding to each high frequency transformer time second, limit winding together, forms the input of second traction invertor.Like this, even if the power required for two traction invertors is unequal, the power that each high frequency transformer provides is also identical, thus achieves the power-balance of hiigh pressure stage submodule, also achieves the balance of voltage of submodule.Such as, hiigh pressure stage is had to have 10 submodules, corresponding 10 high frequency transformers.Power needed for traction invertor 1 is 200kW, and the power needed for traction invertor 2 is 400kW.Namely the power that all high frequency transformers secondary first, limit winding need provide is 200kW, and the power that each winding provides is 20kW; The power that all high frequency transformers secondary second, limit winding need provide is 400kW, and the power that each winding provides is 40kW.So the power that each high frequency transformer provides is two winding power sums, i.e. 60kW.
Further, in the present embodiment, output stage assembly of the present invention is also connected with super capacitor storage unit; That is, output stage assembly is except connecting traction convertor and AuCT and for except both provide energy, meanwhile, and each super capacitor storage unit in parallel of DC side of two traction invertors.The effect of super capacitor storage unit is: when motor braking, and super capacitor storage unit absorbs the energy of traction invertor feedback; When output stage is under-voltage or decompression time, the short time provides energy to traction invertor and AuCT.
As shown in Figure 4, in the present embodiment, super capacitor storage unit comprises a bidirectional DC-DC converter (IGBT half-bridge structure, T1, D1, T2, D3), a filter inductance L and supercapacitive cell (R1 is super capacitor equivalent internal resistance, and C is equivalent capacity).Super capacitor storage unit is connected with negative pole "-" with the positive pole "+" of electric power electric transformer output stage by bidirectional DC-DC converter.
In the running of electric power electric transformer, super capacitor storage unit is controlled in following 3 kinds of operating states:
1) during pulling motor braking, by inverter fed energy to output stage assembly, the direct voltage of output stage assembly is improved, when the direct voltage of output stage assembly is higher than rated value, if at this moment the magnitude of voltage of super capacitor is uncharged to desired value, then charged to super capacitor storage unit by output stage direct voltage, once charge to rated value, then control DC-DC converter, make the magnitude of voltage of super capacitor storage unit keep stable.
2) when being in Traction networks end or Traction networks load increases and causes Traction networks alternating voltage to reduce, the direct voltage of output stage assembly reduces, make the direct voltage of output stage assembly lower than rated value, at this moment super capacitor storage unit is discharged by DC-DC converter, maintain output stage voltage stabilization, provide energy to traction invertor and subordinate inverter.
3) when the undue phase time of Traction networks, line voltage is 0, then the direct voltage of output stage assembly is reduced to zero gradually.At this moment, super capacitor storage unit is discharged by DC-DC converter, maintains output stage voltage stabilization, provides the energy of phase-splitting to traction invertor and subordinate inverter, constant with the locomotive speed maintaining phase-splitting.
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, should be considered as protection scope of the present invention.
Claims (7)
1. for a Multifunction transformer for traction drive, it is characterized in that, comprising:
Hiigh pressure stage assembly, is linked in Traction networks; Described hiigh pressure stage assembly adopts the identical bridge power sub module cascade of n level to form;
Isolation level assembly, comprise more than one high frequency modulated circuit and more than one high frequency transformer, the direct voltage that hiigh pressure stage component transform is come is modulated into high frequency square wave voltage by high frequency modulated circuit, then is coupled to two windings on time limit by high frequency transformer, gives output stage assembly;
Output stage assembly, comprises high frequency H bridge rectification circuit, and the high frequency square wave of coming being coupled by high frequency transformer is reduced into the direct voltage output of high-quality, provides energy to traction invertor, subordinate inverter.
2. the Multifunction transformer for traction drive according to claim 1, it is characterized in that, described hiigh pressure stage assembly is linked in the railway traction net of alternating voltage 25kV by connecting reactance L, described bridge power submodule adopts H bridge module, each described H bridge module in parallel the electric capacity of identical capacity, the alternating voltage that self bears by described H bridge module is transformed into the direct voltage at electric capacity two ends.
3. the Multifunction transformer for traction drive according to claim 1, is characterized in that, described high frequency modulated circuit adopts H bridge full bridge structure, is used for isolating transformer height electronegative potential.
4. the Multifunction transformer for traction drive according to claim 1, is characterized in that, each described high frequency transformer adopts time limit double winding pattern, the corresponding one group of high frequency H bridge rectification circuit of each winding; Then, by high frequency H bridge rectification output-parallel corresponding for each high frequency transformer secondary first, limit winding together, the input of first traction invertor is formed; High frequency H bridge rectification output-parallel corresponding to each described high frequency transformer time second, limit winding together, forms the input of second traction invertor.
5. the Multifunction transformer for traction drive according to claim 1 or 2 or 3 or 4, it is characterized in that, described output stage assembly is also connected with super capacitor storage unit, and when motor braking, described super capacitor storage unit absorbs the energy of traction invertor feedback; When output stage is under-voltage or decompression time, the described super capacitor storage unit short time provides energy to traction invertor and AuCT.
6. the Multifunction transformer for traction drive according to claim 5, it is characterized in that, described super capacitor storage unit comprises a bidirectional DC-DC converter, a filter inductance L and supercapacitive cell, is connected with the positive pole "+" of output stage assembly by bidirectional DC-DC converter with negative pole "-".
7. the Multifunction transformer for traction drive according to claim 6, is characterized in that, described bidirectional DC-DC converter is IGBT half-bridge structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103966.8A CN104935168B (en) | 2014-03-20 | 2014-03-20 | Multifunction transformer for traction drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410103966.8A CN104935168B (en) | 2014-03-20 | 2014-03-20 | Multifunction transformer for traction drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104935168A true CN104935168A (en) | 2015-09-23 |
| CN104935168B CN104935168B (en) | 2017-11-03 |
Family
ID=54122187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410103966.8A Active CN104935168B (en) | 2014-03-20 | 2014-03-20 | Multifunction transformer for traction drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104935168B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877314A (en) * | 2017-03-10 | 2017-06-20 | 山东大学 | A kind of many electric power electric transformer tractive power supply systems of low-pressure side common DC bus |
| CN106956598A (en) * | 2017-04-11 | 2017-07-18 | 山东大学 | A kind of electric power electric transformer tractive power supply system for improving power density |
| CN107732895A (en) * | 2017-11-07 | 2018-02-23 | 西南交通大学 | A kind of electric power electric transformer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141349A1 (en) * | 2006-06-05 | 2007-12-13 | Suinsa Medical Systems S.A. | Electronic power inverter stage |
| US20080304300A1 (en) * | 2007-06-06 | 2008-12-11 | General Electric Company | Power conversion system with galvanically isolated high frequency link |
| CN201369679Y (en) * | 2009-03-10 | 2009-12-23 | 东南大学 | Electronic transformer for electric power line |
| CN201623653U (en) * | 2009-11-20 | 2010-11-03 | 中国电力科学研究院 | Modularized electric power electronic transformer |
| CN103311950A (en) * | 2013-05-15 | 2013-09-18 | 华中科技大学 | Urban rail train regenerative brake energy absorbing and using system and method |
-
2014
- 2014-03-20 CN CN201410103966.8A patent/CN104935168B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007141349A1 (en) * | 2006-06-05 | 2007-12-13 | Suinsa Medical Systems S.A. | Electronic power inverter stage |
| US20080304300A1 (en) * | 2007-06-06 | 2008-12-11 | General Electric Company | Power conversion system with galvanically isolated high frequency link |
| CN201369679Y (en) * | 2009-03-10 | 2009-12-23 | 东南大学 | Electronic transformer for electric power line |
| CN201623653U (en) * | 2009-11-20 | 2010-11-03 | 中国电力科学研究院 | Modularized electric power electronic transformer |
| CN103311950A (en) * | 2013-05-15 | 2013-09-18 | 华中科技大学 | Urban rail train regenerative brake energy absorbing and using system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877314A (en) * | 2017-03-10 | 2017-06-20 | 山东大学 | A kind of many electric power electric transformer tractive power supply systems of low-pressure side common DC bus |
| CN106877314B (en) * | 2017-03-10 | 2023-11-21 | 山东大学 | Multi-power electronic transformer traction power supply system with low-voltage side sharing direct current bus |
| CN106956598A (en) * | 2017-04-11 | 2017-07-18 | 山东大学 | A kind of electric power electric transformer tractive power supply system for improving power density |
| CN107732895A (en) * | 2017-11-07 | 2018-02-23 | 西南交通大学 | A kind of electric power electric transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104935168B (en) | 2017-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103441691B (en) | A kind of mode of resonance electronic power convertor and converter device | |
| EP3255772A1 (en) | System and method for a dc/dc converter | |
| CN104935182B (en) | Transformer for three level traction convertors | |
| CN206698126U (en) | A kind of hauling power device | |
| CN104935205B (en) | Traction drive transformer | |
| CN100533166C (en) | Current converter test circuit | |
| CN104485821A (en) | Direct current transformer device used for power distribution | |
| CN102934343A (en) | Shaft-driven generator system | |
| CN106849305A (en) | A kind of charge-discharge circuit of the vehicle-mounted formula charge power self adaptation of electric automobile | |
| CN106849724A (en) | Auxiliary inverse power supply | |
| CN101574935B (en) | Module combined power quality conditioning system for tractive power supply network | |
| CN102222921A (en) | Capacitor clamping-based trilevel railway power regulator | |
| CN108312889B (en) | High-power high-efficiency bidirectional charger for subway vehicle | |
| CN106655433A (en) | Inductance parameter variable vehicle-mounted integrated circuit | |
| CN104935168B (en) | Multifunction transformer for traction drive | |
| CN206727903U (en) | A kind of AuCT, traction power unit and vehicle | |
| CN102957378A (en) | Modularized multi-level converter-based high-voltage high-capacity frequency changer system | |
| CN113131758A (en) | Current transformer | |
| CN104578827A (en) | Transformer | |
| WO2023066068A1 (en) | Three-phase traction transmission power supply system for multiple units | |
| CN109256764A (en) | A kind of vehicle-mounted grid-side converter suitable for middle pressure direct-current traction power supply | |
| CN112918290B (en) | Hardware multiplexing type vehicle-mounted charger with electrical isolation characteristic and application thereof | |
| CN101789703A (en) | High-power variable frequency power supply device | |
| CN210608555U (en) | High-speed railway unbalance optimization compensation device based on negative sequence injection | |
| CN111756269B (en) | Passenger train DC power supply device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |