CN201252488Y - High-power traction convertor - Google Patents
High-power traction convertor Download PDFInfo
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- CN201252488Y CN201252488Y CNU2008201100384U CN200820110038U CN201252488Y CN 201252488 Y CN201252488 Y CN 201252488Y CN U2008201100384 U CNU2008201100384 U CN U2008201100384U CN 200820110038 U CN200820110038 U CN 200820110038U CN 201252488 Y CN201252488 Y CN 201252488Y
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Abstract
The utility model provides a high-power traction convertor which comprises a charging circuit, a four-quadrant chopper, a traction inverter, a series resonance circuit, a voltage limiting circuit, a traction control unit and an auxiliary feed circuit, wherein an input terminal, a precharging circuit, the four-quadrant chopper, the series resonance circuit, the voltage limiting circuit, the traction inverter and an output terminal are connected in sequence; the series resonance circuit consists of an adjustable resonance capacitor and a resonance inductance; the traction control unit is provided with a power module, a central processor, a digital signal processor, a control signal input and output module, an analog quantity detecting and converting module, an I/O module, a monitoring module and a communication module. The high-power traction convertor has the advantages that due to the adoption of the adjustable resonance capacitor, the operation of the series resonance circuit is more accurate and effective. When the phase region of the feed circuit is divided in a motor train unit through a contact net, uninterrupted power supply is realized to the auxiliary feed system.
Description
Technical field
The utility model relates to current transformer, particularly a kind of High power Traction current transformer.
Background technology
Traditional High power Traction current transformer is made of pre-charge circuit, net side 4 quadrant choppers, intermediate dc loop and motor side traction invertor.Single-phase alternating current from traction transformer is supplied with 4 quadrant choppers by pre-charge circuit, 4 quadrant choppers are transformed into direct current with single-phase alternating current and supply with the intermediate dc loop, and the motor side traction invertor is supplied with phase asynchronous traction motor with the three-phase alternating current that direct current is transformed to voltage and frequency adjustable again.The intermediate dc loop is connected with series resonant circuit and braking chopper circuit.
The intermediate loop overvoltage protection of tradition traction convertor is realized with the braking chopper circuit, when the above-mentioned functions inefficacy causes overvoltage to continue to be elevated to a certain predetermined value, has just lost the reliable protection effect.Simultaneously, the resonant capacitance in traditional traction convertor intermediate dc loop is immutable.This make the work of series resonant circuit can not be more accurately effectively.
In the conventional art, keep the power supply of auxiliary power supply system, generally realize powering by main transformer auxiliary power supply winding.Like this, when motor train unit is passed through the contact line phase-separating section, just can't realize the uninterrupted power supply of system.
The problem that these traditional current transformers exist makes it be subjected to great limitation when being applied to motor train unit.
The utility model content
The purpose of this utility model is to overcome above-mentioned defective, provides that a kind of to have a resonance precision height, overvoltage protection faster more reliable and can carry out the High power Traction current transformer of uninterrupted power supply to auxiliary power supply system.
For achieving the above object, the utility model High power Traction current transformer, comprise traction convertor, series resonant circuit, voltage limiting circuit and auxiliary power supply circuit, described traction convertor comprises and is used for the input terminal that links to each other with external traction transformer, pre-charge circuit, 4 quadrant choppers, traction invertor and the lead-out terminal that is used for linking to each other with external traction motor, described traction convertor links to each other with external traction transformer by described input terminal, described traction invertor links to each other with external traction motor by described lead-out terminal, also comprise series resonant circuit, a voltage limiting circuit and a traction control unit, described input terminal, pre-charge circuit, 4 quadrant choppers, series resonant circuit, voltage limiting circuit, traction invertor links to each other successively with lead-out terminal;
Described series resonant circuit is made of adjustable resonant capacitance and resonant inductance, on the DC link of described adjustable resonant capacitance and the output that is connected described 4 quadrant choppers after resonant inductance is connected;
The output of described 4 quadrant choppers is provided with the auxiliary power supply circuit, described auxiliary power supply circuit comprises auxiliary power supply current transformer and auxiliary power supply contactor, and described auxiliary power supply current transformer is connected on the output of described 4 quadrant choppers by described auxiliary power supply contactor;
Described traction control unit is provided with power module, central processing unit and the digital signal processor that links to each other with described central processing unit by internal bus, I/O module, control signal input/output module, communication module, and the monitoring module and analog quantity detection and the modular converter that link to each other, be used to transmit the trailer system working status parameter respectively with electric interfaces of vehicles;
Wherein, described digital signal processor detects with analog quantity by described monitoring module and links to each other with electric interfaces of vehicles respectively with modular converter, is used for the control of real-time traction control and current transformer;
Described control signal input/output module links to each other with electric interfaces of vehicles, is used for the transmission of control signal and status signal between described central processing unit and the electric interfaces of vehicles;
Described monitoring module is connected between described digital signal processor and the electric interfaces of vehicles, is used for the state-detection and the protection of traction convertor;
Described analog quantity detects with modular converter will carry out conversion from voltage, electric current, temperature, the pressure signal of electric interfaces of vehicles, be transferred to digital signal processor again, and be transferred to described central processing unit by described I/O module;
Described communication module is used for and train communication, comprises communicating by letter of described traction control unit and CCU, the BCU network equipment;
Described power module is connected to the train auxiliary power supply system, is used for the power supply output of traction control unit.The utility model High power Traction current transformer, the output of wherein said 4 quadrant choppers is provided with DC over-voltage protection circuit and is connected in parallel on the DC link, and described DC over-voltage protection circuit is made of the short circuit thyristor.
The utility model High power Traction current transformer, the output of wherein said 4 quadrant choppers is provided with ground fault detection circuit and is connected in parallel on the DC link, and described ground fault detection circuit links to each other with described traction control unit.
The utility model High power Traction current transformer, the output of wherein said 4 quadrant choppers are provided with support electric capacity and are connected in parallel on the DC link.
The utility model High power Traction current transformer, wherein said 4 quadrant choppers and described traction invertor are made of high-voltage I GBT power semiconductor switch and inverse parallel power diode respectively.
The utility model High power Traction current transformer, wherein said voltage limiting circuit is made of braking chopper and pressure limiting resistance, described braking chopper is connected on the DC link of output of described 4 quadrant choppers, and described pressure limiting resistance is connected the output of described braking chopper.
The High power Traction current transformer that the utility model provides, its beneficial technical effects is: compare with existing current transformer, adopted adjustable resonant capacitance, can revise the frequency of resonance, make the work of series resonant circuit more accurately effective.Except having original over-voltage protecting function, also increased the short circuit thyristor, trigger the short circuit thyristor when original function loses efficacy when causing overvoltage to continue to be elevated to a certain predetermined value, thereby blocked traction convertor rapidly, play a protective role more reliably sooner.In addition, power to AuCT by the auxiliary power supply contactor, compare with known scheme by the power supply of main transformer auxiliary power supply winding, its advantage be when motor train unit when the contact line phase-separating section, can keep to auxiliary power supply system and carry out uninterrupted power supply by setting up voltage maintenance pattern.
The utility model is elaborated with reference to accompanying drawing below in conjunction with embodiment.
Description of drawings
Fig. 1 is the circuit diagram of the utility model High power Traction current transformer;
Fig. 2 is the block diagram of traction control unit in the utility model High power Traction current transformer.
Embodiment
With reference to Fig. 1, the utility model High power Traction current transformer comprises traction convertor 2, series resonant circuit 21, voltage limiting circuit 22 and auxiliary power supply circuit 23.Traction convertor 2 comprises input terminal 20, pre-charge circuit 4,4 quadrant choppers 5, DC over-voltage protection circuit 8, ground fault detection circuit 9, supports electric capacity 10, traction invertor 11, lead-out terminal 24 and traction control unit 15; traction transformer 1 links to each other with traction convertor 2 by input terminal 20, and traction invertor 11 links to each other with external traction motor 3 by lead-out terminal 24.4 quadrant choppers 5 and traction invertor 11 are made of high-voltage I GBT power semiconductor switch and inverse parallel power diode respectively.
The DC side of traction convertor 2 is provided with series resonant circuit 21, voltage limiting circuit 22 and auxiliary power supply circuit 23.Input terminal 20, pre-charge circuit 4,4 quadrant choppers 5, series resonant circuit 21, voltage limiting circuit 22, traction invertor 11 link to each other successively with lead-out terminal 24.Voltage limiting circuit 22 is made of braking chopper 7 and pressure limiting resistance 14, and braking chopper 7 is connected on the DC link of output of 4 quadrant choppers 5, and pressure limiting resistance 14 is connected the output of braking chopper 7.The output of 4 quadrant choppers 5 is provided with DC over-voltage protection circuit 8 and is connected in parallel on the DC link, and DC over-voltage protection circuit 8 is made of the short circuit thyristor.The output of 4 quadrant choppers 5 is provided with ground fault detection circuit 9 and is connected in parallel on the DC link, and ground fault detection circuit 9 links to each other with traction control unit 15.The output of 4 quadrant choppers 5 is provided with support electric capacity 10 and is connected in parallel on the DC link.Series resonant circuit 21 is made of adjustable resonant capacitance 6 and resonant inductance 12, on the DC link of adjustable resonant capacitance 6 and the output that is connected 4 quadrant choppers 5 after resonant inductance 12 is connected.
The output of 4 quadrant choppers 5 is provided with auxiliary power supply circuit 23, and auxiliary power supply circuit 23 comprises auxiliary power supply current transformer 13 and auxiliary power supply contactor 16, and auxiliary power supply current transformer 13 is connected on the output of 4 quadrant choppers 5 by auxiliary power supply contactor 16.
With reference to Fig. 2; traction control unit 15 is provided with power module 37, central processing unit 30, digital signal processor 31, control signal input/output module 33, analog quantity and detects and modular converter 36, I/O module 32, monitoring module 35 and communication module 34, and traction control unit 15 is according to the control and the protection that realize from the traction control signal of vehicle and status signal traction convertor 2.
Central processing unit 30 links to each other with control signal input/output module 33, I/O module 32, digital signal processor 31 and communication module 34 respectively by internal bus, carries out the high level controlled function of trailer system, as the processing of traction/braking instruction.Digital signal processor 33 detects with analog quantity by monitoring module 35 and links to each other with electric interfaces of vehicles with modular converter 36, realizes all real-time traction control function and current transformer controlled function, to alleviate most of data processing task of central processing unit 30.Control signal input/output module 33 is used for the control signal between electric interfaces of vehicles and the central processing unit 30 and the transmission of status signal; monitoring module 35 is used for the state-detection and the protection of traction convertor; analog quantity detects and modular converter 36 will be from the voltage of electric interfaces of vehicles; electric current; temperature; signals such as pressure carry out conversion; be transferred to digital signal processor 31 again; be transferred to central processing unit 30 by I/O module 32 simultaneously; communication module 34 is used for and the communicating by letter of train; to realize traction control unit 15 and other network equipment such as CCU; the communication of BCU; power module 37 is connected to the train auxiliary power supply system, to realize the power supply output of traction control unit 15.
If be connected with traction control unit 15 by the service notebook computer that special-purpose software will be housed, can realize that the software of traction control unit 15 is installed or the renewal upgrading, and the detection of traction convertor operating state and failure diagnosis.
The course of work to the utility model High power Traction current transformer is described further below.
2 groups of single-phase alternating currents from traction transformer 1 traction winding are powered to 4 quadrant choppers 5 through pre-charge circuit 4.The work of pre-charge circuit is subjected to the control of traction control unit 15, and the charging current in intermediate dc loop is excessive when starting with the restriction traction convertor.
Be connected by the DC link loop between 4 quadrant choppers 5 and the traction invertor 11.Two 4 quadrant choppers that are made of high-voltage I GBT power semiconductor switch and inverse parallel power diode will be transformed to the direct current of DC loop from the single-phase alternating current of traction transformer 1 under the control of traction control unit.
The adjustable resonant capacitance 6 that is connected DC link is connected with resonant inductance 12 and is constituted series resonant circuit 21, to improve the power factor of circuit on side of overhead contact line.More accurately effective for the work that makes series resonant circuit 21, resonant capacitance is designed to two parts, a part is a fixed capacity, thus another part is can be by changing the variable part that the capacitor connection changes total capacitance value.When debugging, need detect the ripple voltage of DC loop, when ripple voltage surpasses a certain default value, by change capacitor connection correction resonance frequency, thus the operating accuracy of raising resonant circuit.
The DC loop voltage limiting circuit (or resistance braking circuit) that is made of braking chopper 7 and pressure limiting resistance (or brake resistance) 14 is connected DC loop, realizes overvoltage Limiting or resistance braking function under the control of traction control unit 15.
Short circuit thyristor 8 is connected in parallel on the DC link, is used for the quick protection of DC link overvoltage.Support electric capacity 10 and be connected in parallel on the DC link, play the effect of voltage stabilizing, energy storage and filtering.
Ground fault detection circuit 9 is connected DC link, when detecting earth fault, and the work that traction control unit 15 blocks traction convertor.
Under the control of traction control unit 15, the traction invertor 11 that is made of high-voltage I GBT power semiconductor switch and inverse parallel power diode is supplied with phase asynchronous traction motor 3 with the three-phase alternating current that the direct current of DC loop is transformed to voltage and changeable frequency.
Detect the traction control unit 15 that constitutes with core components such as modular converter 36, I/O module 32, monitoring module 35 and communication modules 34 and be installed in the casing of traction convertor by power module 37, central processing unit 30, digital signal processor 31, control signal input/output module 33, analog quantity; traction control unit 15 is according to control command and state parameters such as voltage, electric current from vehicle; by the work of program control current transformer, and have perfect failure diagnosis and defencive function.
In embodiment of the present utility model, the auxiliary power supply current transformer 13 of High power Traction current transformer is connected on the DC link by auxiliary power supply contactor 16.Advantage is when motor train unit is passed through phase-separating section, as long as the speed of a motor vehicle is greater than a certain numerical value, make traction motor work in generating state and to DC loop power supply by setting up voltage maintenance pattern automatically, thereby guarantee that auxiliary power supply system is in the motor train unit continuous firing that can not have a power failure during by phase-separating section.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; relate under the prerequisite of spirit not breaking away from the utility model; various distortion and improvement that the common engineers and technicians in this area make the technical solution of the utility model all should fall in the definite protection range of claims of the present utility model.
Claims (6)
1. High power Traction current transformer, comprise traction convertor (2), series resonant circuit (21), voltage limiting circuit (22) and auxiliary power supply circuit (23), described traction convertor (2) comprises and is used for the input terminal (20) that links to each other with external traction transformer (1), pre-charge circuit (4), 4 quadrant choppers (5), traction invertor (11) and the lead-out terminal (24) that is used for linking to each other with external traction motor (3), described traction convertor (2) links to each other with external traction transformer (1) by described input terminal (20), described traction invertor (11) links to each other with external traction motor (3) by described lead-out terminal (24), it is characterized in that:
Also comprise series resonant circuit (21), voltage limiting circuit (22) and a traction control unit (15), described input terminal (20), pre-charge circuit (4), 4 quadrant choppers (5), series resonant circuit (21), voltage limiting circuit (22), traction invertor (11) link to each other successively with lead-out terminal (24);
Described series resonant circuit (21) is made of adjustable resonant capacitance (6) and resonant inductance (12), on the DC link of described adjustable resonant capacitance (6) and the output that is connected described 4 quadrant choppers (5) after resonant inductance (12) is connected;
The output of described 4 quadrant choppers (5) is provided with auxiliary power supply circuit (23), described auxiliary power supply circuit (23) comprises auxiliary power supply current transformer (13) and auxiliary power supply contactor (16), and described auxiliary power supply current transformer (13) is connected on the output of described 4 quadrant choppers (5) by described auxiliary power supply contactor (16);
Described traction control unit (15) is provided with power module (37), central processing unit (30) and the digital signal processor (31) that links to each other with described central processing unit (30) by internal bus, I/O module (32), control signal input/output module (33), communication module (34), and the monitoring module (35) and the analog quantity that link to each other, be used to transmit the trailer system working status parameter respectively with electric interfaces of vehicles detect and modular converter (36)
Wherein, described digital signal processor (31) detects with analog quantity by described monitoring module (35) and links to each other with electric interfaces of vehicles respectively with modular converter (36), is used for the control of real-time traction control and current transformer;
Described control signal input/output module (33) links to each other with electric interfaces of vehicles, is used for the transmission of control signal and status signal between described central processing unit (30) and the electric interfaces of vehicles;
Described monitoring module (35) is connected between described digital signal processor (31) and the electric interfaces of vehicles, is used for the state-detection and the protection of traction convertor;
Described analog quantity detects with modular converter (36) will carry out conversion from voltage, electric current, temperature, the pressure signal of electric interfaces of vehicles, be transferred to digital signal processor (31) again, and be transferred to described central processing unit (30) by described I/O module (32);
Described communication module (34) is used for and train communication, comprises communicating by letter of described traction control unit (15) and CCU, the BCU network equipment;
Described power module (37) is connected to the train auxiliary power supply system, is used for the power supply output of traction control unit (15).
2. High power Traction current transformer according to claim 1, the output of wherein said 4 quadrant choppers (5) is provided with DC over-voltage protection circuit (8) and is connected in parallel on the DC link, and described DC over-voltage protection circuit (8) is made of the short circuit thyristor.
3. High power Traction current transformer according to claim 1 and 2, the output of wherein said 4 quadrant choppers (5) is provided with ground fault detection circuit (9) and is connected in parallel on the DC link, and described ground fault detection circuit (9) links to each other with described traction control unit (15).
4. High power Traction current transformer according to claim 3, the output of wherein said 4 quadrant choppers (5) are provided with support electric capacity (10) and are connected in parallel on the DC link.
5. High power Traction current transformer according to claim 4, wherein said 4 quadrant choppers (5) and described traction invertor (11) are made of high-voltage I GBT power semiconductor switch and inverse parallel power diode respectively.
6. High power Traction current transformer according to claim 5, wherein said voltage limiting circuit (22) is made of braking chopper (7) and pressure limiting resistance (14), described braking chopper (7) is connected on the DC link of output of described 4 quadrant choppers (5), and described pressure limiting resistance (14) is connected the output of described braking chopper (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201100384U CN201252488Y (en) | 2008-08-14 | 2008-08-14 | High-power traction convertor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201100384U CN201252488Y (en) | 2008-08-14 | 2008-08-14 | High-power traction convertor |
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| CN201252488Y true CN201252488Y (en) | 2009-06-03 |
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| CNU2008201100384U Expired - Lifetime CN201252488Y (en) | 2008-08-14 | 2008-08-14 | High-power traction convertor |
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Cited By (20)
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| CN102035424A (en) * | 2010-12-20 | 2011-04-27 | 青岛四方车辆研究所有限公司 | Power supply changeover single-phase inverter for motor train unit |
| CN102694480A (en) * | 2012-05-24 | 2012-09-26 | 青岛四方车辆研究所有限公司 | Traction converter of straddle type monorail train |
| CN102891610A (en) * | 2011-07-19 | 2013-01-23 | 安奕极电源***有限责任公司 | Power supply assembly for a reactor for polysilicon production with a frequency converter |
| CN103144548A (en) * | 2011-12-07 | 2013-06-12 | 中国北车股份有限公司大连电力牵引研发中心 | Traction control unit and control box |
| CN103368410A (en) * | 2012-03-31 | 2013-10-23 | 永济新时速电机电器有限责任公司 | Traction converter |
| CN103419670A (en) * | 2013-06-24 | 2013-12-04 | 长春轨道客车股份有限公司 | Motor train unit traction system powered by energy storing device |
| WO2014000353A1 (en) * | 2012-06-26 | 2014-01-03 | 唐山轨道客车有限责任公司 | Power supply device and power supply system for hybrid railway vehicle and railway vehicle |
| CN103587426A (en) * | 2012-08-13 | 2014-02-19 | 中国北车股份有限公司大连电力牵引研发中心 | Light rail vehicle traction system |
| CN104442844A (en) * | 2014-12-16 | 2015-03-25 | 中国北车集团大连机车车辆有限公司 | Electric locomotive power supply circuit |
| WO2015188289A1 (en) * | 2014-06-09 | 2015-12-17 | 北京交通大学 | Method of controlling interruption of power supply of auxiliary coil when train passes split phase |
| CN105356675A (en) * | 2015-10-28 | 2016-02-24 | 唐山轨道客车有限责任公司 | Direct-current permanent magnet brushless motor converter used for rail vehicle |
| WO2016123884A1 (en) * | 2015-02-05 | 2016-08-11 | 中车青岛四方车辆研究所有限公司 | Motor train unit traction control system |
| CN106671782A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Alternating current electric locomotive traction system |
| WO2017101630A1 (en) * | 2015-12-16 | 2017-06-22 | 中车青岛四方机车车辆股份有限公司 | Apparatus for reusing energy of train passing through split-phase |
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| CN102035424A (en) * | 2010-12-20 | 2011-04-27 | 青岛四方车辆研究所有限公司 | Power supply changeover single-phase inverter for motor train unit |
| CN102891610A (en) * | 2011-07-19 | 2013-01-23 | 安奕极电源***有限责任公司 | Power supply assembly for a reactor for polysilicon production with a frequency converter |
| CN103144548A (en) * | 2011-12-07 | 2013-06-12 | 中国北车股份有限公司大连电力牵引研发中心 | Traction control unit and control box |
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| CN103419670A (en) * | 2013-06-24 | 2013-12-04 | 长春轨道客车股份有限公司 | Motor train unit traction system powered by energy storing device |
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| WO2015188289A1 (en) * | 2014-06-09 | 2015-12-17 | 北京交通大学 | Method of controlling interruption of power supply of auxiliary coil when train passes split phase |
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| WO2016123884A1 (en) * | 2015-02-05 | 2016-08-11 | 中车青岛四方车辆研究所有限公司 | Motor train unit traction control system |
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| CN105356675A (en) * | 2015-10-28 | 2016-02-24 | 唐山轨道客车有限责任公司 | Direct-current permanent magnet brushless motor converter used for rail vehicle |
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| CN106671782A (en) * | 2015-11-09 | 2017-05-17 | 中车大连电力牵引研发中心有限公司 | Alternating current electric locomotive traction system |
| WO2017101630A1 (en) * | 2015-12-16 | 2017-06-22 | 中车青岛四方机车车辆股份有限公司 | Apparatus for reusing energy of train passing through split-phase |
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| CN107991554A (en) * | 2017-11-21 | 2018-05-04 | 北京合力电气传动控制技术有限责任公司 | A kind of electronic load device |
| CN107834890B (en) * | 2017-11-21 | 2019-12-06 | 北京合力电气传动控制技术有限责任公司 | Electronic load device |
| CN110677060A (en) * | 2018-07-02 | 2020-01-10 | 台达电子工业股份有限公司 | Power conversion system and pre-charging method of direct current bus capacitor therein |
| US10917023B2 (en) | 2018-07-02 | 2021-02-09 | Delta Electronics, Inc. | Power conversion system and method for pre charging DC-Bus capacitors therein |
| WO2020087599A1 (en) * | 2018-10-31 | 2020-05-07 | 中车永济电机有限公司 | Intermediate direct-current loop of traction converter, and traction converter |
| CN110289764A (en) * | 2019-05-29 | 2019-09-27 | 中国国家铁路集团有限公司 | Power conversion device |
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| CN112098890B (en) * | 2020-09-16 | 2023-04-28 | 中车青岛四方车辆研究所有限公司 | Alternating-current grounding fault detection method for parallel auxiliary converters of motor train unit |
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