CN102035400A - Ground power supply system of motor train unit - Google Patents

Ground power supply system of motor train unit Download PDF

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Publication number
CN102035400A
CN102035400A CN 201010595184 CN201010595184A CN102035400A CN 102035400 A CN102035400 A CN 102035400A CN 201010595184 CN201010595184 CN 201010595184 CN 201010595184 A CN201010595184 A CN 201010595184A CN 102035400 A CN102035400 A CN 102035400A
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CN
China
Prior art keywords
power supply
motor train
train unit
socket
crh2
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
CN 201010595184
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Chinese (zh)
Inventor
邢晓东
李东义
周光德
傅博
陈克芬
邵立鹏
王明海
陈洁
叶炯
焦高军
庞元凤
刘希鹏
曹晓明
孙法明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
Original Assignee
Qingdao Sifang Rolling Stock 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 Qingdao Sifang Rolling Stock Research Institute filed Critical Qingdao Sifang Rolling Stock Research Institute
Priority to CN 201010595184 priority Critical patent/CN102035400A/en
Publication of CN102035400A publication Critical patent/CN102035400A/en
Priority to PCT/CN2011/075759 priority patent/WO2012083649A1/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M5/00Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L1/00Supplying electric power to auxiliary equipment of vehicles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02Circuit 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L2200/00Type of vehicles
    • B60L2200/26Rail vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention relates to a ground power supply system of a motor train unit. The system comprises a main power supply, a transmission cable and a field socket, wherein the field socket comprises a China railway high-speed (CRH)1 field socket, an CRH2 field socket, an CRH3 field socket and an CRH5 field socket; the CRH1 field socket, the CRH3 field socket and the CRH5 are directly connected with the main power supply through the transmission cable; and the CRH2 field socket is connected with the main power supply through a single-phase AC400V motor train unit power supply. The system is simple in structure, reasonable in arrangement and safe and reliable in use, outputs the main power supply to different electrical appliance connectors, supplies a ground power supply to motor train units of different model numbers, solves the problem of ground power supply of each type of motor train unit, converts the traditional three-phase alternating current power supply into a single-phase power supply through the AC400V motor train unit power supply so as to supply a stable power supply environment to the CRH2 motor train unit and does not affect the grid when three-phase electricity or two-phase electricity is used at an output end after alternating current-direct current-alternating current conversion.

Description

Motor train unit surface power supply power-supply system
Technical field
The present invention relates to a kind of electric power system of railroad train, specifically, relate to a kind of surface power supply power-supply system of high-speed railway train.
Background technology
Along with the raising gradually of science and technology development and people's living standard, people have adapted at a high speed gradually, life style efficiently.Motor train unit has speed height, stable characteristics stably as bullet train, has become the vehicles of first-selection when people are far away to go on a journey gradually on the way.Motor train unit needs a cover surface power supply power-supply system when upkeep operation.At present, the existing motor train unit of China has four kinds of models of CRH1/CRH2/CRH3/CRH5, and existing 8 short marshallings have 16 first draft groups again, the heavily marshallings of connection of the short marshalling of two row in addition, and it is very difficult that the power supply system of 4 kinds of vehicles is different again with the position, compatibility is got up; And when overhaul of train-set, the unbalanced problem of three phase mains that also exists CRH2 motor train unit single phase power supply to cause.Therefore need a kind ofly can satisfy different power supply systems and solve the unbalanced motor train unit surface power supply of the three phase mains power-supply system that power supply causes.
Summary of the invention
The objective of the invention is to the problems referred to above such as three phase mains imbalance that compatibility is difficult and the CRH2 power supply causes at the existence of motor train unit surface power supply, provide a kind of topology layout reasonable, safe and reliable, and satisfied compatible different model motor train unit surface power supply and solve the unbalanced motor train unit surface power supply of the three phase mains power-supply system that power supply causes.
Technical scheme of the present invention is: a kind of motor train unit surface power supply power-supply system, comprise main power source, power transmission cable and on-the-spot socket, described on-the-spot socket comprises the on-the-spot socket of CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5, CRH1, CRH3 directly are connected with main power source by power transmission cable with the on-the-spot socket of CRH5, and the on-the-spot socket of CRH2 is connected with main power source by a single-phase AC400V motor train unit power supply; Described single-phase AC400V motor train unit power supply comprises inlet wire reactor, frequency converter, sine wave filter and isolating transformer, after main power source output process inlet wire reactor and frequency converter pass through the AC-DC-AC unsteady flow with alternating current, by sine wave filter it is become sine wave, become the power supply of AC400V, 50Hz again by isolating transformer, be connected with the on-the-spot socket of CRH2 through power transmission cable, and be the power supply of CRH2 motor train unit by the on-the-spot socket of CRH2;
Preferably, described main power source comprises high-voltage metering cubicle, breaker cabinet and transformer, breaker cabinet comprises primary cut-out cabinet and low-voltage circuit breaker cabinet, transformer is the 10kV/0.4kV transformer, the 3AC10kV high-tension electricity is delivered to the primary cut-out cabinet by high-voltage metering cubicle, be converted to low tension by the 10kV/0.4kV transformer then, be delivered to the on-the-spot socket of CRH1, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5 by the low-voltage circuit breaker cabinet, and be delivered to single-phase AC400V motor train unit power supply and the on-the-spot socket of CRH2 by the low-voltage circuit breaker cabinet;
Preferably, the on-the-spot socket of described CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5 include control panel, current transformer, control relay, circuit breaker, electric coupler and electrical quantity instrument;
Preferably, described circuit breaker adopts electric operating formula circuit breaker.
The invention has the beneficial effects as follows: the present invention is simple in structure rationally distributed, safe and reliable, different electric couplers are passed through in main power source output, for the different model motor train unit provides the ground auxiliary electric power supply, solved the ground power supply powerup issue of compatible various motor train unit; Simultaneously, the present invention adopts high-power frequency conversion, filtering, voltage stabilizing technique, to have three-phase alternating-current supply now by single-phase AC400V motor train unit power supply and be transformed into required single phase poaer supply, can provide stable power supply environment for the CRH2 motor train unit, after AC-DC-interchange conversion, when output is got three-phase or two-phase electricity, can not impact electrical network.
Description of drawings
Accompanying drawing 1 is the structural representation of the specific embodiment of the invention;
Accompanying drawing 2 is the structured flowchart of the single-phase AC400V motor train unit of specific embodiment of the invention power supply;
Accompanying drawing 3 is the structured flowchart of the on-the-spot socket of the specific embodiment of the invention;
Accompanying drawing 4 is the electrical schematic diagram of the single-phase AC400V motor train unit of specific embodiment of the invention power supply.
Embodiment
The specific embodiment of the present invention: shown in Fig. 1 to 4, a kind of motor train unit surface power supply power-supply system, comprise main power source, power transmission cable and on-the-spot socket, described on-the-spot socket comprises the on-the-spot socket of CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5, CRH1, CRH3 directly are connected with main power source by power transmission cable with the on-the-spot socket of CRH5, and the on-the-spot socket of CRH2 is connected with main power source by a single-phase AC400V motor train unit power supply; Described single-phase AC400V motor train unit power supply comprises inlet wire reactor, frequency converter, sine wave filter and isolating transformer, after main power source output process inlet wire reactor and frequency converter pass through the AC-DC-AC unsteady flow with alternating current, by sine wave filter it is become sine wave, become the power supply of AC400V, 50Hz again by isolating transformer, be connected with the on-the-spot socket of CRH2 through power transmission cable, and be the power supply of CRH2 motor train unit by the on-the-spot socket of CRH2.Main power source comprises high-voltage metering cubicle, breaker cabinet and transformer, breaker cabinet comprises primary cut-out cabinet and low-voltage circuit breaker cabinet, transformer is the 10kV/0.4kV transformer, the 3AC10kV high-tension electricity is delivered to the primary cut-out cabinet by high-voltage metering cubicle, be converted to low tension by the 10kV/0.4kV transformer then, be delivered to the on-the-spot socket of CRH1, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5 by the low-voltage circuit breaker cabinet, and be delivered to single-phase AC400V motor train unit power supply and the on-the-spot socket of CRH2 by the low-voltage circuit breaker cabinet.The on-the-spot socket of described CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5 include control panel, current transformer, control relay, circuit breaker, electric coupler and electrical quantity instrument, and circuit breaker adopts electric operating formula circuit breaker.
When motor train unit during at upkeep operation, the various existing car socket of CRH1, CRH2, CRH3 and CRH5 is provided with according to motor train unit power supply position, at corresponding power supply current potential the on-the-spot socket of different model is installed, motor train unit power supply for different model, after motor train unit comes to a complete stop according to the parking stall, when needs are powered, corresponding on-the-spot socket and stube cable are taken out, link to each other with the surface power supply electric coupler of motor train unit, power to motor train unit according to corresponding operational procedure.
Operation principle: the surface power supply power-supply system comprises CRH1, CRH3 and CRH5 motor train unit surface power supply and CRH2 motor train unit surface power supply.
(1) operation principle of CRH1, CRH3 and CRH5 motor train unit surface power supply power supply: by the power supply of main power source with 3AC10k|V alternating current 3AC400V, 50Hz, the power supply of 3AC400V, 50Hz is delivered to CRH1, CRH3 and the on-the-spot socket of CRH5 through power transmission cable, by circuit breaker, stube cable and electric coupler on CRH1, CRH3 and the on-the-spot socket of CRH5, be CRH1, CRH3 and the power supply of CRH5 motor train unit auxiliary system at last.
(2) operation principle of CRH2 motor train unit surface power supply power supply: by main power source with 3AC10KV alternating current 3AC400V, the power supply of 50Hz, with 3AC400V, the power supply of 50Hz is through single-phase AC400V motor train unit power supply, by big-power transducer with 3AC400V, the 50Hz alternating current is by after AC → DC → AC unsteady flow, by sine wave filter it is become sine wave, become AC400V by isolating transformer again, the power supply of 50Hz, deliver to the on-the-spot socket of CRH2 through power transmission cable, at last by the circuit breaker on the on-the-spot socket of CRH2, stube cable and electric coupler are the power supply of CRH2 motor train unit auxiliary system.

Claims (4)

1. motor train unit surface power supply power-supply system, comprise main power source, power transmission cable and on-the-spot socket, it is characterized in that: described on-the-spot socket comprises the on-the-spot socket of CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5, CRH1, CRH3 directly are connected with main power source by power transmission cable with the on-the-spot socket of CRH5, and the on-the-spot socket of CRH2 is connected with main power source by a single-phase AC400V motor train unit power supply; Described single-phase AC400V motor train unit power supply comprises inlet wire reactor, frequency converter, sine wave filter and isolating transformer, after main power source output process inlet wire reactor and frequency converter pass through the AC-DC-AC unsteady flow with alternating current, by sine wave filter it is become sine wave, become the power supply of AC400V, 50Hz again by isolating transformer, be connected with the on-the-spot socket of CRH2 through power transmission cable, and be the power supply of CRH2 motor train unit by the on-the-spot socket of CRH2.
2. motor train unit surface power supply power-supply system according to claim 1, it is characterized in that: described main power source comprises high-voltage metering cubicle, breaker cabinet and transformer, breaker cabinet comprises primary cut-out cabinet and low-voltage circuit breaker cabinet, transformer is the 10kV/0.4kV transformer, the 3AC10kV high-tension electricity is delivered to the primary cut-out cabinet by high-voltage metering cubicle, be converted to low tension by the 10kV/0.4kV transformer then, be delivered to the on-the-spot socket of CRH1 by the low-voltage circuit breaker cabinet, the on-the-spot socket of on-the-spot socket of CRH3 and CRH5, and be delivered to single-phase AC400V motor train unit power supply and the on-the-spot socket of CRH2 by the low-voltage circuit breaker cabinet.
3. motor train unit surface power supply power-supply system according to claim 1 is characterized in that: the on-the-spot socket of described CRH1, the on-the-spot socket of CRH2, the on-the-spot socket of CRH3 and the on-the-spot socket of CRH5 include control panel, current transformer, control relay, circuit breaker, electric coupler and electrical quantity instrument.
4. motor train unit surface power supply power-supply system according to claim 3 is characterized in that: described circuit breaker adopts electric operating formula circuit breaker.
CN 201010595184 2010-12-20 2010-12-20 Ground power supply system of motor train unit Pending CN102035400A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN 201010595184 CN102035400A (en) 2010-12-20 2010-12-20 Ground power supply system of motor train unit
PCT/CN2011/075759 WO2012083649A1 (en) 2010-12-20 2011-06-15 Ground power supply system for bullet trains

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010595184 CN102035400A (en) 2010-12-20 2010-12-20 Ground power supply system of motor train unit

Publications (1)

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CN102035400A true CN102035400A (en) 2011-04-27

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WO (1) WO2012083649A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083649A1 (en) * 2010-12-20 2012-06-28 青岛四方车辆研究所有限公司 Ground power supply system for bullet trains
CN102602860A (en) * 2011-12-20 2012-07-25 青岛四方车辆研究所有限公司 Lifting control system of car lifting jack
CN102664434A (en) * 2012-05-05 2012-09-12 山东电力集团公司枣庄供电公司 Solar mobile power supply for agricultural irrigation
CN105449795A (en) * 2016-01-11 2016-03-30 中车青岛四方车辆研究所有限公司 Tramcar ground charging power supply system and charging control method
CN107046376A (en) * 2017-01-20 2017-08-15 铁道第三勘察设计院集团有限公司 A kind of EMUs ground power supply
CN110212432A (en) * 2019-05-30 2019-09-06 中铁第四勘察设计院集团有限公司 A kind of EMU inversion is comprehensive for electric car
US20220089033A1 (en) * 2019-01-09 2022-03-24 Southwest Jiaotong University Three-rail power supply control system for electrified railway train

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201214378Y (en) * 2008-05-23 2009-04-01 中国北车集团大同电力机车有限责任公司 Control device for locomotive power supply cabinet
CN201276024Y (en) * 2008-08-25 2009-07-22 铁道部运输局 Auxiliary control unit of power distributed motor train unit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100395952C (en) * 2006-08-08 2008-06-18 西南交通大学 Drag transmitting and transforming equipment
JP2008059128A (en) * 2006-08-30 2008-03-13 Toshiba Corp Power supply system
CN200981504Y (en) * 2006-12-18 2007-11-28 中国南车集团株洲电力机车有限公司 Control supply unit for motor train unit power vehicle redundancy design
CN102035400A (en) * 2010-12-20 2011-04-27 青岛四方车辆研究所有限公司 Ground power supply system of motor train unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201214378Y (en) * 2008-05-23 2009-04-01 中国北车集团大同电力机车有限责任公司 Control device for locomotive power supply cabinet
CN201276024Y (en) * 2008-08-25 2009-07-22 铁道部运输局 Auxiliary control unit of power distributed motor train unit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
《机车电传动》 20080910 胡学永等 CRH2型200kmh动车组辅助供电系统 , 第5期 *
《铁道车辆》 20090228 邢晓东 CRH动车组地面电源系统 第47卷, 第2期 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012083649A1 (en) * 2010-12-20 2012-06-28 青岛四方车辆研究所有限公司 Ground power supply system for bullet trains
CN102602860A (en) * 2011-12-20 2012-07-25 青岛四方车辆研究所有限公司 Lifting control system of car lifting jack
CN102664434A (en) * 2012-05-05 2012-09-12 山东电力集团公司枣庄供电公司 Solar mobile power supply for agricultural irrigation
CN105449795A (en) * 2016-01-11 2016-03-30 中车青岛四方车辆研究所有限公司 Tramcar ground charging power supply system and charging control method
CN105449795B (en) * 2016-01-11 2018-01-19 中车青岛四方车辆研究所有限公司 Tramcar ground charge power supply system and charge control method
CN107046376A (en) * 2017-01-20 2017-08-15 铁道第三勘察设计院集团有限公司 A kind of EMUs ground power supply
CN107046376B (en) * 2017-01-20 2019-02-12 铁道第三勘察设计院集团有限公司 A kind of EMU ground power supply
US20220089033A1 (en) * 2019-01-09 2022-03-24 Southwest Jiaotong University Three-rail power supply control system for electrified railway train
US12109914B2 (en) * 2019-01-09 2024-10-08 Southwest Jiaotong University Three-rail power supply control system for electrified railway train
CN110212432A (en) * 2019-05-30 2019-09-06 中铁第四勘察设计院集团有限公司 A kind of EMU inversion is comprehensive for electric car
CN110212432B (en) * 2019-05-30 2023-12-15 中铁第四勘察设计院集团有限公司 Motor train unit inversion comprehensive power supply vehicle

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Application publication date: 20110427