WO2003047904A1 - Dc variable main circuit system used for railway vehicle - Google Patents

Dc variable main circuit system used for railway vehicle Download PDF

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Publication number
WO2003047904A1
WO2003047904A1 PCT/KR2001/002239 KR0102239W WO03047904A1 WO 2003047904 A1 WO2003047904 A1 WO 2003047904A1 KR 0102239 W KR0102239 W KR 0102239W WO 03047904 A1 WO03047904 A1 WO 03047904A1
Authority
WO
WIPO (PCT)
Prior art keywords
railway vehicle
variable
system used
railway
main circuit
Prior art date
Application number
PCT/KR2001/002239
Other languages
French (fr)
Inventor
Young Jae Han
Kil Dong Kim
Hyun Joon Park
Sung Gyu Choi
Jung Min Cho
Original Assignee
Korea Railroad Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Korea Railroad Research Institute filed Critical Korea Railroad Research Institute
Priority to GB0412449A priority Critical patent/GB2400758B/en
Publication of WO2003047904A1 publication Critical patent/WO2003047904A1/en

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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
    • B60L9/30—Electric propulsion with power supply external to the vehicle using ac induction motors fed from different kinds of power-supply lines
    • 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
    • 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

Definitions

  • the present invention generally relates to a DC variable main circuit system used for a railway vehicle and, more particularly, to a DC variable main circuit system used for a railway vehicle, which flexibly converts a DC voltage variably applied thereto depending on regional equipment characteristics in case of a long-distance railway service, to enable smooth power supply and restoration operation.
  • a railway plays an important role in the transportation field together with an automobile, an airplane and a ship for convenient human life.
  • the railway is being usefully used as a large-scale transportation means connecting a region to region in this complicated industrial society.
  • an object of the present invention to provide a DC variable main circuit system used for a railway vehicle, which flexibly copes with railway systems and feeding modes with individual characteristics of various countries in the operation of a long-distance railway service connecting a country to country or continent to continent, so that the railway vehicle can run across the countries or continents without being replaced with another one.
  • Another object of the present invention is to provide a DC variable main circuit system used for a railway vehicle, which flexibly receives and restores variable voltages of DC 3000V and DC 1500V applied based on regional equipment characteristics when the railway vehicle is running, and switches the DC voltages using mechanical switches to enable smooth power supply and instantaneous voltage control .
  • variable power propulsion control system used for a railway vehicle, constructed in such a manner that a variable voltage converter connected to a variable power supply line is connected with two inverters selectively connected in series or parallel with each other according to a plurality of mechanical switches, to provide current required for running the railway vehicle to a motor.
  • FIG. 1 shows the configuration of a DC variable main circuit system used for a railway vehicle according to the present invention
  • FIG. 2 is a circuit diagram of the DC variable main circuit system used for a railway vehicle according to the present invention
  • FIG. 3 shows a current flow when DC 3000V input power is supplied to the system of the present invention
  • FIG. 4 shows a current flow when DC 1500V input power is supplied to the system of the present invention
  • FIG. 5 shows the current flow of a restoration operation when DC 3000V input power is supplied to the system of the present invention
  • FIG. 6 shows the current flow of a restoration operation when DC 1500V input power is supplied to the system of the present invention
  • FIG. 7 is a simulation circuit diagram of a variable voltage converter and inverters according to the present invention.
  • FIG. 8 shows DC link voltage, inverter voltages, motor speed and torque when an input power is converted from DC 3000V into DC 1500V in accordance with the present invention
  • FIG. 9 shows DC link voltage, inverter voltage, motor speed and torque when an input power is converted from DC 1500V into DC 3000V according to the present invention.
  • FIG. 1 shows the configuration of a DC variable main circuit system used for a railway vehicle according to the present invention
  • FIG. 2 is a circuit diagram of the DC variable main circuit system used for a railway vehicle according to the present invention.
  • the DC variable main circuit system of the invention includes a variable voltage converter connected to a variable power supply line and two inverters.
  • the variable voltage converter restricts harmonic current at its generation side, that is, it means a converter.
  • the variable voltage converter is generally constructed in a manner that a reactor is connected to an AC power with the input and output of an inverter being changed to each other, and a diode rectifier is removed. This variable voltage converter converts AC into DC and remarkably reduces low-order harmonics .
  • the inverter which is a general inverting device converting DC into AC, receives power provided by a power supply and varies the voltage and frequency of the power to supply it to a railway vehicle motor M, to thereby allow the speed of the motor M to be easily controlled with a high efficiency.
  • the present invention employs two inverters which are connected to each other according to a plurality of mechanical switches so that they can be selectively connected with each other in series or parallel, as shown in FIG. 2.
  • variable power propulsion control system used for a railway vehicle, having the aforementioned circuit configuration, is explained hereinafter.
  • variable voltage converter operates to serially- connect inverters having rated voltage of 1500V at a DC link stage to each other, as shown in FIG. 3.
  • variable voltage converter operates to connect the inverters with rated voltage of 1500V at the DC link stage with each other in parallel, as shown in FIG. 4. At this time, current flows along the two dotted lines shown in FIG. 4.
  • the switch 1 S/Wl is connected to a port 2 and the switch 2 S/W2 is opened.
  • FIG. 7 is a simulation circuit diagram of the variable power propulsion control system used for a railway vehicle according to the present invention.
  • the system includes the variable voltage converter, two inverters, the motor M and a controller.
  • the motor M is employed as a load for one inverter in order to improve the simulation processing speed.
  • FIG. 8 shows voltages supplied to the two inverters and simulated results of other operation situations when the power provided to the railway vehicle is converted from DC 3000V into DC 1500V.
  • the output waveform of FIG. 8(a) shows that the voltage supplied to the railway vehicle is varied from DC 3000V into DC 1500V.
  • FIGS. 8(b) and 8(c) respectively show the voltages provided to the inverters. It can be known from FIGS. 8(a), 8(b) and 8(c) that the rated voltage of each inverter is stabilized in DC 1500V even if the voltage supplied thereto is varied.
  • FIG. 8 (d) shows the speed of the motor M according to the aforementioned voltage supply. As shown in FIG. 8(d), the motor stably maintains a uniform speed even though the supply voltage is changed.
  • FIG. 9 shows voltages supplied to the two inverters and simulated results of other operation situations when the power provided to the railway vehicle is converted from DC 1500V into DC 1300V. In this case, satisfactory output characteristics similar to the case shown in FIG. 8 can be obtained.
  • the DC variable main circuit system used for a railway vehicle according to the present invention is not restrictedly applied to the conversion of DC 3000V into DC 1500V or DC ' 1500V into DC 3000V but it can be applied to the conversion between different DC voltages such as DC 1500V/DC 750V.
  • the DC variable main circuit system used for a railway vehicle flexibly receives and restores power

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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

The present invention provides a DC variable main circuit system used for a railway vehicle, which flexibly copes with railway systems and feeding modes with individual characteristics of various countries in the operation of a long-distance railway service connecting a country to country or continent to continent, so that the railway vehicle can run across the countries or continents without being replaced with another one. In addition, the invention provides a DC variable main circuit system used for a railway vehicle, which flexibly receives and restores variable voltages of DC 3000V and DC 1500V applied based on regional equipment characteristics when the railway vehicle is running, and switches the DC voltages using mechanical switches to enable smooth power supply and instantaneous voltage control. A variable power propulsion control system used for a railway vehicle is constructed in such a manner that a variable voltage converter connected to a variable power supply line is connected with two inverters selectively connected in series or parallel with each other according to a plurality of mechanical switches, to provide current required for running the railway vehicle to a motor.

Description

DC VARIABLE MAIN CIRCUIT SYSTEM USED FOR RAILWAY
VEHICLE
Technical Field
The present invention generally relates to a DC variable main circuit system used for a railway vehicle and, more particularly, to a DC variable main circuit system used for a railway vehicle, which flexibly converts a DC voltage variably applied thereto depending on regional equipment characteristics in case of a long-distance railway service, to enable smooth power supply and restoration operation.
Background Art
Conventionally, a railway plays an important role in the transportation field together with an automobile, an airplane and a ship for convenient human life. The railway is being usefully used as a large-scale transportation means connecting a region to region in this complicated industrial society.
With the railway becoming high-speed, advanced and globalized, an international long-distance railway service connecting a country to country or continent to continent has been recently constructed in addition to a short-distance service connecting a region to region within a limited territory. However, a longdistance railway vehicle running between different countries or continents does not appropriately correspond to railway systems and feeding methods with individual characteristics of various countries. When the railway vehicle crosses the border into another country, accordingly, it should be replaced with the one suitable for the railway system equipment and feeding mode of that country.
To solve this problem, continuous efforts have been recently concentrated on the development of a domestic railway vehicle propulsion control system capable of smoothly coping with variable power applied when the long-distance railway vehicle is running. However, concrete systems for Europe and Asia railway networks have not been developed. The current technology has realized a system of converting DC 1500V into AC 25kV.
Therefore, it is a problem, which we should urgently solve, that the technical development on the
DC variable system being supplied of power by different
DCs for the running of the railway vehicle should be conducted.
Disclosure of Invention
It is, therefore, an object of the present invention to provide a DC variable main circuit system used for a railway vehicle, which flexibly copes with railway systems and feeding modes with individual characteristics of various countries in the operation of a long-distance railway service connecting a country to country or continent to continent, so that the railway vehicle can run across the countries or continents without being replaced with another one.
Another object of the present invention is to provide a DC variable main circuit system used for a railway vehicle, which flexibly receives and restores variable voltages of DC 3000V and DC 1500V applied based on regional equipment characteristics when the railway vehicle is running, and switches the DC voltages using mechanical switches to enable smooth power supply and instantaneous voltage control .
To accomplish the objects of the present invention, there is provided a variable power propulsion control system used for a railway vehicle, constructed in such a manner that a variable voltage converter connected to a variable power supply line is connected with two inverters selectively connected in series or parallel with each other according to a plurality of mechanical switches, to provide current required for running the railway vehicle to a motor.
Brief Description of the Drawings
Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
FIG. 1 shows the configuration of a DC variable main circuit system used for a railway vehicle according to the present invention;
FIG. 2 is a circuit diagram of the DC variable main circuit system used for a railway vehicle according to the present invention;
FIG. 3 shows a current flow when DC 3000V input power is supplied to the system of the present invention;
FIG. 4 shows a current flow when DC 1500V input power is supplied to the system of the present invention; FIG. 5 shows the current flow of a restoration operation when DC 3000V input power is supplied to the system of the present invention;
FIG. 6 shows the current flow of a restoration operation when DC 1500V input power is supplied to the system of the present invention;
FIG. 7 is a simulation circuit diagram of a variable voltage converter and inverters according to the present invention;
FIG. 8 shows DC link voltage, inverter voltages, motor speed and torque when an input power is converted from DC 3000V into DC 1500V in accordance with the present invention; and FIG. 9 shows DC link voltage, inverter voltage, motor speed and torque when an input power is converted from DC 1500V into DC 3000V according to the present invention.
Best Mode for Carrying Out the Invention
The present invention will now be described in connection with preferred embodiments with reference to the accompanying drawings.
FIG. 1 shows the configuration of a DC variable main circuit system used for a railway vehicle according to the present invention, and FIG. 2 is a circuit diagram of the DC variable main circuit system used for a railway vehicle according to the present invention.
The DC variable main circuit system of the invention includes a variable voltage converter connected to a variable power supply line and two inverters. The variable voltage converter restricts harmonic current at its generation side, that is, it means a converter. The variable voltage converter is generally constructed in a manner that a reactor is connected to an AC power with the input and output of an inverter being changed to each other, and a diode rectifier is removed. This variable voltage converter converts AC into DC and remarkably reduces low-order harmonics .
The inverter, which is a general inverting device converting DC into AC, receives power provided by a power supply and varies the voltage and frequency of the power to supply it to a railway vehicle motor M, to thereby allow the speed of the motor M to be easily controlled with a high efficiency. The present invention employs two inverters which are connected to each other according to a plurality of mechanical switches so that they can be selectively connected with each other in series or parallel, as shown in FIG. 2.
The operation of the variable power propulsion control system used for a railway vehicle, having the aforementioned circuit configuration, is explained hereinafter.
In case where the railway vehicle that is running is provided with DC 3000V from the power supply line, the variable voltage converter operates to serially- connect inverters having rated voltage of 1500V at a DC link stage to each other, as shown in FIG. 3. Here, current flows as shown as the dotted line in FIG. 3.
In case where the railway vehicle, being connected to the DC 3000V supply line, is restored, current flows from the motor M to the power supply as shown in FIG. 5. Here, a switch 1 S/Wl is connected to a port 2, and a switch 2 S/W 2 is opened.
Meantime, in case where the railway vehicle is provided with power from DC 1500V supply line, the variable voltage converter operates to connect the inverters with rated voltage of 1500V at the DC link stage with each other in parallel, as shown in FIG. 4. At this time, current flows along the two dotted lines shown in FIG. 4. When the railway vehicle, being connected to the DC 1500V supply line, is restored, current flows from the motor M to the power supply as shown in FIG. 6. Here, the switch 1 S/Wl is connected to a port 2 and the switch 2 S/W2 is opened.
FIG. 7 is a simulation circuit diagram of the variable power propulsion control system used for a railway vehicle according to the present invention. Referring to FIG. 7, the system includes the variable voltage converter, two inverters, the motor M and a controller. The motor M is employed as a load for one inverter in order to improve the simulation processing speed.
FIG. 8 shows voltages supplied to the two inverters and simulated results of other operation situations when the power provided to the railway vehicle is converted from DC 3000V into DC 1500V. The output waveform of FIG. 8(a) shows that the voltage supplied to the railway vehicle is varied from DC 3000V into DC 1500V. FIGS. 8(b) and 8(c) respectively show the voltages provided to the inverters. It can be known from FIGS. 8(a), 8(b) and 8(c) that the rated voltage of each inverter is stabilized in DC 1500V even if the voltage supplied thereto is varied. In addition, FIG. 8 (d) shows the speed of the motor M according to the aforementioned voltage supply. As shown in FIG. 8(d), the motor stably maintains a uniform speed even though the supply voltage is changed.
FIG. 9 shows voltages supplied to the two inverters and simulated results of other operation situations when the power provided to the railway vehicle is converted from DC 1500V into DC 1300V. In this case, satisfactory output characteristics similar to the case shown in FIG. 8 can be obtained. The DC variable main circuit system used for a railway vehicle according to the present invention is not restrictedly applied to the conversion of DC 3000V into DC 1500V or DC ' 1500V into DC 3000V but it can be applied to the conversion between different DC voltages such as DC 1500V/DC 750V.
As described above, the DC variable main circuit system used for a railway vehicle according to the present invention flexibly receives and restores power
(DC 3000V or DC 1500V, for example) variably applied depending on regions (countries or continents) and switches the power according to mechanical switches, to enable smooth power supply and instantaneous voltage control. This can flexibly cope with railway systems and feeding modes with individual characteristics of various countries. Accordingly, in case of a ling- distance railway service connecting a country to country or continent to continent, the railway vehicle can run throughout the various countries or continents without being replaced with another one.
Although specific embodiments including the preferred embodiment have been illustrated and described, it will be obvious to those skilled in the art that various modifications may be made without departing from the spirit and scope of the present invention, which is intended to be limited solely by the appended claims.

Claims

What Is Claimed Is:
1. A variable power propulsion control system used for a railway vehicle, constructed in such a manner that a variable voltage converter connected to a variable power supply line is connected with two inverters selectively connected in series or parallel with each other according to a plurality of mechanical switches, to provide current required for running the railway vehicle to a motor.
2. The system as claimed in claim 1, wherein, when DC 3000V is provided by the variable power supply line, the variable voltage converter serially connects inverters with the rated voltage of 1500V at a DC link stage to each other to convert the DC 3000V into DC 1500V.
3. The system as claimed in claim 1, wherein, when DC 1500V is provided by the variable power supply line, the variable voltage converter serially connects the inverters with the rated voltage of 1500V at the DC link stage to each other to convert the DC 1500V into DC 3000V.
4. The system as claimed in claim 1, wherein the variable voltage converter and the inverters are employed to perform conversion between different voltages such as DC 1500V/DC 750V.
PCT/KR2001/002239 2001-12-06 2001-12-21 Dc variable main circuit system used for railway vehicle WO2003047904A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0412449A GB2400758B (en) 2001-12-06 2001-12-21 DC variable main circuit system used for railway vehicle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR2001/77099 2001-12-06
KR10-2001-0077099A KR100458177B1 (en) 2001-12-06 2001-12-06 DC variable circuit system by train

Publications (1)

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WO2003047904A1 true WO2003047904A1 (en) 2003-06-12

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GB (1) GB2400758B (en)
WO (1) WO2003047904A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1914557A2 (en) * 2006-10-20 2008-04-23 Fanuc Ltd Insulation-resistance degradation detecting device for motors
WO2012025254A1 (en) * 2010-08-24 2012-03-01 Siemens Aktiengesellschaft Multi-system traction power converter
EP2629413A1 (en) * 2012-02-14 2013-08-21 Bombardier Transportation GmbH Supply of electric power within in a track-bound electric vehicle by means of modular multilevel converters
CN105150863A (en) * 2015-08-27 2015-12-16 株洲南车时代电气股份有限公司 Connection device for external power source of railway vehicle
US11491886B2 (en) 2018-06-22 2022-11-08 Eloaded Gmbh DC voltage charging post for charging an electric vehicle

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JP2023102405A (en) * 2022-01-12 2023-07-25 株式会社Subaru Drive system of vehicle

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KR910005076Y1 (en) * 1989-02-27 1991-07-15 서울전선 주식회사 Coating device of coating compressor
US6054674A (en) * 1998-01-16 2000-04-25 Sansha Electric Manufacturing Company, Limited DC power supply apparatus for arc-utilizing apparatuses

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JPS60102893A (en) * 1983-11-08 1985-06-07 Hitachi Ltd Voltage response type circuit automatic switching type motor-driven pump
KR910005076Y1 (en) * 1989-02-27 1991-07-15 서울전선 주식회사 Coating device of coating compressor
US6054674A (en) * 1998-01-16 2000-04-25 Sansha Electric Manufacturing Company, Limited DC power supply apparatus for arc-utilizing apparatuses

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1914557A2 (en) * 2006-10-20 2008-04-23 Fanuc Ltd Insulation-resistance degradation detecting device for motors
EP1914557A3 (en) * 2006-10-20 2008-10-29 Fanuc Ltd Insulation-resistance degradation detecting device for motors
WO2012025254A1 (en) * 2010-08-24 2012-03-01 Siemens Aktiengesellschaft Multi-system traction power converter
EP2629413A1 (en) * 2012-02-14 2013-08-21 Bombardier Transportation GmbH Supply of electric power within in a track-bound electric vehicle by means of modular multilevel converters
CN105150863A (en) * 2015-08-27 2015-12-16 株洲南车时代电气股份有限公司 Connection device for external power source of railway vehicle
US11491886B2 (en) 2018-06-22 2022-11-08 Eloaded Gmbh DC voltage charging post for charging an electric vehicle
EP3587164B1 (en) * 2018-06-22 2023-12-20 eLoaded GmbH System with central unit and plurality of direct voltage charging columns for charging electric vehicles

Also Published As

Publication number Publication date
GB0412449D0 (en) 2004-07-07
KR20030046831A (en) 2003-06-18
KR100458177B1 (en) 2004-11-26
GB2400758B (en) 2005-09-28
GB2400758A (en) 2004-10-20

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