CN108859790A - A kind of novel traction transmission system main circuit - Google Patents

A kind of novel traction transmission system main circuit Download PDF

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Publication number
CN108859790A
CN108859790A CN201710340572.8A CN201710340572A CN108859790A CN 108859790 A CN108859790 A CN 108859790A CN 201710340572 A CN201710340572 A CN 201710340572A CN 108859790 A CN108859790 A CN 108859790A
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CN
China
Prior art keywords
current transformer
transformer
traction
main circuit
motor
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
Application number
CN201710340572.8A
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Chinese (zh)
Inventor
宋平岗
戈旺
林家通
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East China Jiaotong University
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East China Jiaotong University
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Filing date
Publication date
Application filed by East China Jiaotong University filed Critical East China Jiaotong University
Priority to CN201710340572.8A priority Critical patent/CN108859790A/en
Publication of CN108859790A publication Critical patent/CN108859790A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B60L9/16—Electric propulsion with power supply external to the vehicle using ac induction motors
    • B60L9/24—Electric propulsion with power supply external to the vehicle using ac induction motors fed from ac supply lines
    • B60L9/28—Electric propulsion with power supply external to the vehicle using ac induction motors fed from ac supply lines polyphase motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/20—AC to AC converters
    • B60L2210/22—AC to AC converters without intermediate conversion to DC
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/10—Electrical machine types
    • B60L2220/12—Induction machines

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

A kind of novel traction transmission system main circuit, main circuit include current transformer, intermediate-frequency transformer and traction ac motor.For the current transformer that the primary circuit of intermediate-frequency transformer is connected by traction power supply net by electricity, the current transformer that the secondary circuit of intermediate-frequency transformer is connected is traction ac motor power supply.Every phase winding of traction ac motor is powered and is controlled by different current transformers.The intermediate frequency of main circuit realization tractive transformer, independently-powered and control between three phase alternating current motor, the every phase coil of motor itself is independently-powered around component layers, and additional flow directing device is not necessarily to using dynamic braking, reduce the complexity of device, its economy is improved, main circuit structure has hierarchical, modular advantage.This main circuit is primarily adapted for use in powerful rail traction transmission field.

Description

A kind of novel traction transmission system main circuit
Technical field
The present invention relates to a kind of novel traction transmission system main circuit more particularly to one kind, that electric locomotive may be implemented is vehicle-mounted The lightweight of tractive transformer weight, volume reductionization, three phase alternating current motor split-phase is independently-powered, between three-phase traction alternating current generator solely The main circuit structure of vertical power supply and control, belongs to railway locomotive traction technique field.
Background technique
The fast-developing promotion for driving electric locomotive and electric EMU whole design and performance of railway high speed heavy duty, electric power The Traction Drive of locomotive and electric EMU and control are its crucial component parts.At this stage, electric traction drive is mainly taken The mode of AC Drive first passes through pantograph from contact net by locomotive and is flowed, using the tractive transformer on locomotive, rectification Then cabinet, inversion drive traction electric machine to drive locomotive, are passed to rail finally by wheel, form an electric loop.Traction electricity Traction electric machine will be parallel in main circuit by the way of centrally connected power supply and be controlled by owner.In this traction drive In be primarily present two defects：
1, the quality and capacity issue of tractive transformer.Existing tractive transformer takes low frequency designs, bulky, weight Weight, is unfavorable for the master-plan of electric locomotive, often places it in the floor of locomotive or motor-car at present in the following, this is just lifted The height on floor, limitation locomotive interior space utilize.
2, the centrally connected power supply control mode of traction electric machine.The centrally connected power supply of traction electric machine is unfavorable for eliminating wheel pair idling, Occur to be unfavorable for improving adhesion weight utilization rate under Axle Weight Transfer of Locomotive by Using, hauling ability is insufficient.
For both of these problems, Main has using the electric power electric transformer of output DC side parallel come real at present It is existing, traditional industrial frequency traction transformer weight weight that this method can solve, bulky problem, but traction is exchanged The power supply of motor and control mode are not improved, and can also in the parallel connection of traction electric power electric transformer DC output side So that due to circulation problem caused by Voltage unbalance between capacitor.In addition, the mode of braking of current three-phase traction asynchronous machine Dynamic braking is mainly used, but this mode of braking needs to increase additional DC power supply apparatus, increases the complexity of device. For this purpose, studying, one kind can either reduce traditional transformer weight weight, bulky defect can preferably improve traction alternating current again The power supply of machine and mode of braking are of great significance.
Summary of the invention
The problem of it is an object of the invention to be directed to traction drive in background technique, proposes that one kind can subtract Light traction Industrial Frequency Transformer weight, the volume for reducing industrial frequency traction transformer preferably can realize split-phase to traction electric machine itself again It powers, a kind of independently-powered and braking novel traction transmission system main circuit is realized between traction electric machine.
Technical solution used by purpose is a kind of novel traction transmission system main circuit, such as attached drawing 1 to realize the present invention It is shown comprising the primary circuit and secondary circuit and traction ac motor of intermediate-frequency transformer, intermediate-frequency transformer 1 includes primary side Winding P1And vice-side winding N1, primary circuit includes current transformer 1, and secondary circuit includes current transformer 2 and traction ac motor M A phase winding；Intermediate-frequency transformer 2 includes primary side winding P2And vice-side winding N2, primary circuit includes current transformer 3, secondary side electricity Road includes current transformer 4 and the phase winding for drawing ac motor M；Intermediate-frequency transformer 3 includes primary side winding P3And vice-side winding N3, primary circuit includes current transformer 5, and secondary circuit includes current transformer 6 and the phase winding for drawing ac motor M；Unsteady flow Device 1, current transformer 3 are flowed in the traction power supply net that is connected in series between current transformer 5 and accesses 25kV/50Hz, finally by vehicle Wheel, rail form a complete electric loop.
Basic principle of the invention is：The input side of main circuit accesses traction power supply net, and passes through the change between different levels Stream device series connection is divided, and each transverse layers will be drawn by the current transformer 1 that intermediate-frequency transformer primary circuit is connected The alternating current of the single-phase low frequency of power supply network becomes the alternating current of single-phase mid-frequency, passes through current transformer on the secondary side of intermediate-frequency transformer later 2 the alternating current of single-phase mid-frequency is become into traction electric machine needed for single-phase alternating current to be supplied for a phase winding of traction electric machine Electricity.It is flowed by the input current transformer of the primary circuit of 3 intermediate-frequency transformers from traction power supply net, in 3 intermediate-frequency transformers Secondary circuit in the outlet side of current transformer connect traction ac motor to complete a traction ac motor Power supply and control.
Threephase asynchronous in the present invention use the control strategy of dynamic braking for：Turn off the switch of current transformer 4 and 6 Device keeps the conducting of the diagonal bridge arm of switch of current transformer 2, so that current transformer 2 exports direct current, current transformer 4 and 6 is in shutdown shape State.
Current transformer 1 of the invention, current transformer 3, current transformer 5 use identical converter structure, current transformer 2 of the invention, Current transformer 4, current transformer 6 use identical converter structure.Wherein, current transformer 1, current transformer 3, current transformer 5 use AC/DC/AC Unsteady flow；Current transformer 2, current transformer 4, current transformer 6 use AC/DC/AC unsteady flow.
In summary it is found that novel traction transmission system main circuit of the invention has following technological merit：
1）Realize the independent flexibly power supply and control between three phase alternating current motor, and can be to every phase winding of three phase alternating current motor itself Carry out layering power supply and control.
2）It draws ac motor and additional DC power supply apparatus is not necessarily to using dynamic braking, reduce the complexity of equipment And cost.
3) volume and weight of tractive transformer can be effectively reduced using intermediate frequency tractive transformer.
4）Being powered using one layer of one phase can avoid circulation problem brought by Multi-layer Parallel.
Detailed description of the invention
Fig. 1 is a kind of novel traction transmission system main circuit structure schematic diagram of the invention.
Fig. 2 is that the present invention uses full-bridge converter structure specific embodiment circuit diagram.
The switch plan of current transformer 2, current transformer 4, current transformer 6 when Fig. 3 is in the embodiment of the present invention using dynamic braking Slightly.
Specific embodiment
Below with reference to embodiment and compares attached drawing invention is further described in detail.
A kind of novel traction transmission system main circuit comprising the primary circuit and secondary circuit of intermediate-frequency transformer, intermediate frequency Transformer 1 includes primary side winding P1And vice-side winding N1, primary circuit includes current transformer 1, secondary circuit include current transformer 2 and Draw a phase winding of ac motor M；Intermediate-frequency transformer 2 includes primary side winding P2And vice-side winding N2, primary circuit includes Current transformer 3, secondary circuit include current transformer 4 and the phase winding for drawing ac motor M；Intermediate-frequency transformer 3 include primary side around Group P3And vice-side winding N3, primary circuit includes current transformer 5, and secondary circuit includes current transformer 6 and traction ac motor M One phase winding；Current transformer 1, current transformer 3, in the traction power supply net that is connected in series between current transformer 5 and accesses 25kV/50Hz by Stream.
A kind of novel traction transmission system main circuit is as shown in Fig. 2 using the specific embodiment of full-bridge unsteady flow structure.Become It flows device 1, current transformer 3, current transformer 5 and uses AC/DC/AC unsteady flow structure, current transformer 2, current transformer 4, current transformer 6 use AC/DC/AC Unsteady flow structure.And each current transformer all uses single-phase full bridge structure.A-b is the input side of first layer, this layer of input side alternating current Pressure isu s1, by two switch bridge arm S for rectifying current transformer11-S14By exchange input electricityu s1Unsteady flow simultaneously passes through outlet side electricity in parallel Hold CH1Obtain direct current VH1, direct current VH1Pass through two switch bridge arm S in inverter unit again21-S24Obtain midfrequent AC Electricityu T11, then the primary circuit of intermediate-frequency transformer 1 is accessed, alternating current is obtained on the secondary side of intermediate-frequency transformer 1u T12, alternating current lateru T12Using two bridge arm S of rectification current transformer31-S34Rectify and by outlet side shunt capacitance CL1Obtain direct current VL1, last direct current VL1Pass through the switch bridge arm S of inverter41-S44Unsteady flow obtains single phase ac output electricityu o1, the friendship that is exported Flow single-phase electricityu o1It is connect with the A phase winding loop A-X of three phase alternating current motor.C-d is the input side of the second layer, which inputs top-cross Galvanic electricity us2, by two switch bridge arm M for rectifying current transformer11-M14By exchange input electricityu s2Unsteady flow simultaneously passes through outlet side electricity in parallel Hold CH2Obtain direct current VH2, direct current VH2Pass through two switch bridge arm M in inverter unit again21-M24Obtain alternating currentu T21, then the primary circuit of intermediate-frequency transformer 2 is accessed, alternating voltage is obtained on the secondary side of intermediate-frequency transformer 2u T22, exchange later Electricityu T22Using two bridge arm M of rectification current transformer31-M34Rectify and by outlet side shunt capacitance CL2Obtain direct current VL2, last direct current VL2Pass through the switch bridge arm M of inverter41-M44Unsteady flow obtains single phase ac output electricityu o2, the friendship that is exported Flow single-phase electricityu o2It is connect with the B phase winding coil B-Y of three phase alternating current motor.E-f is the input side of third layer, which inputs top-cross Galvanic electricity pressure isu s3, by two switch bridge arm N for rectifying current transformer11-N14By exchange input electricityu s3Unsteady flow simultaneously passes through outlet side simultaneously Join capacitor CH3Obtain direct current VH3, direct current VH3Pass through two switch bridge arm N in inverter unit again21-N24Obtain intermediate frequency Alternating currentu T31, then the primary circuit of intermediate-frequency transformer 3 is accessed, alternating current is obtained on the secondary side of intermediate-frequency transformer 3u T32, Zhi Houjiao Galvanic electricityu T32Using two bridge arm N of rectification current transformer31-N34Rectify and by outlet side shunt capacitance CL3Obtain direct current Electric VL3, last direct current VL3Pass through the switch bridge arm N of inverter41-N44Unsteady flow obtains single phase ac output electricityu o3, exported AC single phase electricityu o3It is connect with the C phase winding coil C-Z of three phase alternating current motor, to be powered to whole three phase alternating current motor And control.
Traction threephase asynchronous machine is when taking dynamic braking, current transformer 2, current transformer 4, the switching tube S in current transformer 641- S44Driving signal such as attached drawing 3（a）With（b）It is shown, switching tube M41-M44Driving signal such as Fig. 3（c）It is shown, switching tube N41- N44Driving signal such as Fig. 3（d）It is shown.Current transformer 4, current transformer 6 will be in an off state, and the output direct current of current transformer 2 is A-X coil is by direct current supply and generates stationary magnetic field, and it is static to cut this by the inertia rotation of the rotor in three phase alternating current motor Magnetic field achievees the purpose that braking to generate braking moment.
In conclusion a kind of novel traction transmission system main circuit of the invention, which has, can be layered confession to traction alternating current generator Electricity, power supply is flexibly and mode of braking is simple, can achieve the purpose that dynamic braking without increasing additional flow directing device, in The isolation method of frequency power transformer can effectively reduce the weight and volume of device, be suitable for railway locomotive Traction Drive occasion.

Claims (5)

1. a kind of novel traction transmission system main circuit, it is characterised in that：The main circuit includes the primary circuit of intermediate-frequency transformer With secondary circuit and traction ac motor, 1 intermediate-frequency transformer 1 of attached drawing includes primary side winding P1 and vice-side winding N1, primary side Circuit includes current transformer 1, and secondary circuit includes current transformer 2 and the phase winding for drawing ac motor M；Intermediate-frequency transformer 2 wraps Primary side winding P2 and vice-side winding N2 is included, primary circuit includes current transformer 3, and secondary circuit includes current transformer 4 and traction exchange A phase winding of motor M；Intermediate-frequency transformer 3 includes primary side winding P3 and vice-side winding N3, and primary circuit includes current transformer 5, secondary circuit includes current transformer 6 and the phase winding for drawing ac motor M；It is connected in series and connects between current transformer 1,3,5 Enter and flowed in the traction power supply net of 25kV/50Hz, forms a complete electric loop finally by wheel, rail.
2. a kind of novel traction transmission system main circuit according to claim 1, which is characterized in that current transformer 1,3,5 is adopted With AC/DC/AC unsteady flow；Current transformer 2,4,6 uses AC/DC/AC unsteady flow.
3. a kind of novel traction transmission system main circuit according to claim 1, which is characterized in that current transformer 1,3,5 is adopted With identical converter structure, current transformer 2,4,6 uses identical converter structure.
4. a kind of novel traction transmission system main circuit according to claim 1, which is characterized in that asynchronous machine uses energy Two in 2,4,6 current transformers are directly turned off when consumption braking by switching tube, remaining 1 current transformer is defeated by control switch device Direct current out.
5. a kind of novel traction transmission system main circuit according to claim 1, which is characterized in that switching device is two-way Power tube.
CN201710340572.8A 2017-05-15 2017-05-15 A kind of novel traction transmission system main circuit Pending CN108859790A (en)

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Application Number Priority Date Filing Date Title
CN201710340572.8A CN108859790A (en) 2017-05-15 2017-05-15 A kind of novel traction transmission system main circuit

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803787A (en) * 2019-10-28 2021-05-14 株洲中车机电科技有限公司 Locomotive traction transformer and application thereof
CN114157178A (en) * 2021-11-01 2022-03-08 西南交通大学 Novel traction converter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110007534A1 (en) * 2009-07-10 2011-01-13 Regents Of The University Of Minnesota Soft switching power electronic transformer
CN104065279A (en) * 2014-06-25 2014-09-24 西安理工大学 Voltage disturbance generation device and method for simulating power grid disturbance
CN104527462A (en) * 2014-11-24 2015-04-22 西南交通大学 Existing traction power supply system based improved parallel through type traction power supply system
CN204559403U (en) * 2015-04-10 2015-08-12 南车株洲电力机车研究所有限公司 A kind of traction voltage transformation device
CN204567350U (en) * 2015-04-16 2015-08-19 西南交通大学 A kind of cascade connection type is without input and the through cophase supply system of output transformer
CN104935182A (en) * 2014-03-20 2015-09-23 南车株洲电力机车研究所有限公司 Transformer used for three-level traction current transformer
CN104935205A (en) * 2014-03-20 2015-09-23 南车株洲电力机车研究所有限公司 Transformer used for traction transmission system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110007534A1 (en) * 2009-07-10 2011-01-13 Regents Of The University Of Minnesota Soft switching power electronic transformer
CN104935182A (en) * 2014-03-20 2015-09-23 南车株洲电力机车研究所有限公司 Transformer used for three-level traction current transformer
CN104935205A (en) * 2014-03-20 2015-09-23 南车株洲电力机车研究所有限公司 Transformer used for traction transmission system
CN104065279A (en) * 2014-06-25 2014-09-24 西安理工大学 Voltage disturbance generation device and method for simulating power grid disturbance
CN104527462A (en) * 2014-11-24 2015-04-22 西南交通大学 Existing traction power supply system based improved parallel through type traction power supply system
CN204559403U (en) * 2015-04-10 2015-08-12 南车株洲电力机车研究所有限公司 A kind of traction voltage transformation device
CN204567350U (en) * 2015-04-16 2015-08-19 西南交通大学 A kind of cascade connection type is without input and the through cophase supply system of output transformer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803787A (en) * 2019-10-28 2021-05-14 株洲中车机电科技有限公司 Locomotive traction transformer and application thereof
CN114157178A (en) * 2021-11-01 2022-03-08 西南交通大学 Novel traction converter

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Application publication date: 20181123