CN108638913B - Power configuration method for medium-speed magnetic levitation traction system - Google Patents
Power configuration method for medium-speed magnetic levitation traction system Download PDFInfo
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- CN108638913B CN108638913B CN201810722661.3A CN201810722661A CN108638913B CN 108638913 B CN108638913 B CN 108638913B CN 201810722661 A CN201810722661 A CN 201810722661A CN 108638913 B CN108638913 B CN 108638913B
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- 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
- B60L13/00—Electric propulsion for monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles
- B60L13/04—Magnetic suspension or levitation for vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a power configuration method of a medium-speed magnetic levitation traction system, wherein a set of traction system is adopted by a vehicle; the traction system at least comprises: a traction inverter; 6 suspension frames are configured on a section of vehicle, wherein a linear motor is respectively arranged on the left side and the right side of 4 suspension frames, and 8 linear motors arranged on the left side and the right side of 4 suspension frames are used as linear motor units; 4 linear motors on the same side of the middle 4 suspension frames are connected in series, and then the linear motors connected in series on the two sides are connected in parallel; the input end of the linear motor unit is connected with the output end of the traction inverter; the method of the invention meets the power design requirement of the linear motor and the traction capacity design requirement of the magnetic suspension vehicle. The light weight of the vehicle is realized to the greatest extent, and the suspension and passenger carrying capacity of the vehicle are improved.
Description
Technical Field
The invention belongs to the field of train traction system control, and particularly relates to a power configuration technology of a magnetic suspension train traction control system.
Background
Compared with the traditional urban rail transit such as subways and low floors, the medium-low speed maglev train has various advantages, high comfort, ultra-small radius curve passing capacity, extremely strong climbing capacity and low manufacturing cost, and the medium-low speed maglev train is promoted to become the most favored rail transit system at present and has good development prospect. Because the urban rail transit speed of the subway, the light rail and the like which is popularized at present is generally lower, and suburban transportation has higher requirements on the speed, the medium-low speed magnetic levitation just fills the gap between the subway and the high-speed rail. At present, medium and low speed maglev trains at home and abroad are based on a DC1500V power supply system, because the suspension capacity of a suspension system is limited, if all suspension frames are configured by adopting a traditional full power unit, the suspension passenger carrying capacity of the maglev train is restricted due to the increase of the number of equipment, so the light weight of the vehicle is realized to the first order on the premise of meeting the traction capacity, the scheme not only can better adapt to the limited space below the train body, but also can improve the passenger carrying capacity of the maglev train more importantly.
At present, most of medium-low speed maglev trains adopt full power unit configuration on the basis of a set of traction system, namely traction motors are arranged on two sides of all suspension frames to provide power. For six suspension frames, if 1 linear motor is respectively configured on the left side and the right side of each suspension frame, and one traction inverter controls 12 linear motors in a six-string two-parallel control mode. (1) The medium-speed magnetic levitation needs to achieve the speed grade of 120km/h, the capacity of a traction inverter is about 864kVA, meanwhile, the number of the configured traction motors is 12, and the required capacity of the required traction motors is only 72 kVA. If the design capacity utilization rate of the traction motor is low according to the power configuration mode, most space of equipment under each suspension frame is occupied by the traction motor, and arrangement of other equipment in the limited space below the vehicle body is not facilitated. (2) The increase of the number of linear motors inevitably leads to the increase of the overall mass of the magnetic levitation vehicle, which means that the passenger carrying capacity of the vehicle is further reduced under the condition of certain levitation capacity and very limited passenger carrying capacity.
Disclosure of Invention
In order to solve the technical problems, the invention provides a power configuration method of a medium-speed magnetic levitation traction system, which adopts a power distribution scheme of four-action two-towing of a single-section vehicle and single-traction system so as to solve the problems that the existing suspension capacity is limited, the space under the vehicle is insufficient, and related equipment under the vehicle cannot be installed.
The technical scheme adopted by the invention is as follows: a medium speed magnetic levitation traction system power configuration method, a section of vehicle adopts a set of traction system; the traction system comprises at least: a traction inverter;
6 suspension frames are configured on a section of vehicle, wherein a linear motor is respectively arranged on the left side and the right side of 4 suspension frames, and 8 linear motors arranged on the left side and the right side of 4 suspension frames are used as linear motor units;
4 linear motors on the same side of the middle 4 suspension frames are connected in series, and then the linear motors connected in series on the two sides are connected in parallel;
and the input end of the linear motor unit is connected with the output end of the traction inverter.
Further, the 6 suspension frames are symmetrically distributed in the middle of the section of the vehicle.
Furthermore, a linear motor is respectively arranged at the left side and the right side of the middle 4 suspension frames in the 6 suspension frames of the vehicle.
Further, the traction system further comprises: the system comprises a high-voltage distribution box, a high-voltage electrical cabinet, a reactor box and a three-phase auxiliary inverter; the high-voltage distribution box is connected with direct-current voltage from a substation, the direct-current voltage is divided into six paths through the high-voltage electrical cabinet, the first path is input into the traction inverter after passing through the reactor, the second path is directly input into the traction inverter, the third path and the fourth path are connected with the DC330V, and the fifth path and the sixth path are connected with the three-phase auxiliary inverter.
Further, the terminal voltage of each linear motor is 275V.
The invention has the beneficial effects that: the invention adopts a configuration scheme of four-action two-towing of six suspension frames of a single-section train, wherein only the middle four suspension frames provide traction power, and 8 linear motors are configured on two sides of the four suspension frames to meet the design requirement of the traction capacity of the medium-speed maglev train; has the following advantages:
(1) the single-section vehicle is provided with six suspension frames, so that the magnetic suspension vehicle has better curve passing performance;
(2) 8 linear motors are arranged on the six suspension frames, the capacity of each motor is about 108kVA, the maximum traction force is about 4kN, and the traction force reaches about 3.2kN when the speed reaches 120 km/h; the resistance of the single-section magnetic suspension vehicle reaching the maximum design speed per hour is about 5kN, so the characteristic design and the number of the linear motors are enough to meet the traction force required by the magnetic suspension vehicle at the speed of 120km/h, the traction acceleration is ensured, and the magnetic suspension vehicle has the capability of reaching the design speed to run;
(3) the power of six suspension frames of a single-section vehicle is reasonably distributed, a running mechanism integrally forms a four-action two-towing configuration scheme, the traction force required by the speed grade of 120km/h is ensured on the basis of only adopting one set of traction system, and the utilization rate of the capacity of a traction motor is also improved; the power units and the non-power units are symmetrically arranged by taking the central line of the transverse line of the vehicle body as a boundary, so that the stress distribution of each suspension bracket under the traction and braking working conditions is more reasonable;
(4) the 8 linear motors are arranged on two sides of the four suspension frames in the power unit, and are wired in a four-string and two-parallel mode by taking a longitudinal center line as a boundary; the existing conditions and equipment are utilized to the maximum extent, the number of motors is reduced through reasonable power distribution, and meanwhile, the particularity of the magnetic suspension vehicle body is also considered through a simple and reasonable wiring mode, so that the compact space below the vehicle body is better adapted; in addition, the light weight of the vehicle is realized, and the passenger carrying capacity of the vehicle is improved; the problems of limited arrangement space and insufficient suspension capacity of the conventional medium-low speed magnetic suspension equipment are solved by a relatively economic and simple method;
(5) based on the reasonable arrangement of the power distribution scheme to the equipment, the uniform stress and the balanced stress of the vehicle in the running process are ensured to the greatest extent, and the running stability and the safety of the train are improved;
(6) on the premise of not changing the DC1500V system and the capacity of a single traction inverter, the traction capacity design of the magnetic suspension vehicle is met by changing the terminal voltage of the linear motor, reducing the number of the motors and reasonably configuring the power of the six suspension frames, the limited space under the vehicle is better adapted, and the suspension passenger carrying capacity is improved.
Drawings
FIG. 1 is a schematic representation of a scheme of the present invention;
fig. 2 shows the principle of the traction system.
Detailed Description
In order to facilitate the understanding of the technical contents of the present invention by those skilled in the art, the present invention will be further explained with reference to the accompanying drawings.
The invention relates to a power configuration method of a traction system suitable for a medium-speed maglev train, which adopts a configuration scheme of four-action two-towing of six suspension frames of a single-section train based on the traction characteristics of a linear induction motor suitable for the speed of 120km/h, wherein only four suspension frames in the middle provide traction power, and 8 linear motors are configured on two sides of the four suspension frames in total so as to meet the design requirement of the traction capacity of the medium-speed maglev train. As shown in fig. 1, a single traction system for a single-section vehicle mainly includes a high-voltage distribution box, a high-voltage electrical cabinet, a reactor box, and a traction inverter, and realizes control of 8 linear motors. Based on the DC1500V power supply system of domestic medium and low speed maglev trains and the 1500kVA design capacity of one traction inverter, the design capacity of a single linear motor is about 108kVA, and the required capacity of 8 motors is about 860kVA, so that one traction inverter can sufficiently meet the design capacity requirement of the maglev vehicle at the speed of 120 km/h. The DC330V shown in fig. 1 supplies power for levitation.
The 120km/h speed grade magnetic suspension vehicle adopts a power configuration scheme that a single-section vehicle single-traction system six suspension frames are four-action two-towing, second, third, fourth and fifth suspension frames in the middle of the single-section vehicle are all power units, first and sixth suspension frames at two ends of the single-section vehicle are non-power units, 8 linear motors are arranged at two sides of 4 power units, and a four-series and two-parallel wiring mode is adopted. The configuration scheme meets the power design requirement of the linear motor and the traction capacity design requirement of the magnetic suspension vehicle. The light weight of the vehicle is realized to the greatest extent, and the suspension and passenger carrying capacity of the vehicle are improved.
As shown in fig. 2, the traction system mainly has the function of inverting the DC1500V into alternating current to drive 8 three-phase linear traction motors, so as to realize the traction of the magnetic-levitation train, and the connection mode of the motors is four-series and two-parallel. According to the requirements of input voltage and current, the main circuit of the inverter adopts a two-level voltage type inverter circuit, and the power device adopts an IGBT.
If the speed grade of the train changes, the capacity and the equipment size of the traction linear motor can be reasonably matched with the installation space, the requirement of the total traction can be met by further improving the end voltage of the linear motor, and therefore the number of the motors is reduced. The scheme saves the arrangement space of equipment under the train, realizes the light weight of the train and meets the traction requirement of realizing the 120km/h speed grade operation of the train by adopting the linear motor as a driving mode.
According to the configuration scheme, the 4 power suspension frames and the 2 non-power suspension frames are respectively positioned in the middle and at two ends below the vehicle body, power is provided only by the traction motors arranged at two sides of the two-position, three-position, four-position and five-position suspension frames, and the four-action and two-traction power distribution mode is adopted to be symmetrically arranged along the transverse center line of the vehicle body, so that the stress distribution of the suspension frames and the vehicle body during traction and braking is more reasonable, and the dynamic performance of the vehicle and the riding comfort are ensured; meanwhile, more importantly, the arrangement mode of the invention eliminates the end effect of the linear traction motor and ensures the good traction characteristic of the motor; in addition, because 4 power units are positioned on 4 adjacent suspension frames in the middle of the vehicle body, the wiring among 8 traction linear motors is further simplified, and more space under the vehicle is saved; on the other hand, due to the reduction of the number of the devices, the light weight of the vehicle is realized, and the passenger carrying capacity of the vehicle is improved. The problems of limited arrangement space and insufficient suspension capacity of the conventional medium-low speed magnetic suspension equipment are solved by a relatively economic and simple method. Based on the reasonable arrangement of the power distribution scheme to the equipment, the stress uniformity and stress balance of the vehicle in the running process are ensured to the greatest extent, and the running stability and safety of the train are improved.
The capacity of a single motor is about 108kVA, the maximum traction force is about 4kN, and the traction force reaches about 3.2kN when the speed reaches 120 km/h. The resistance of the single-section magnetic suspension vehicle reaching the maximum designed speed per hour is about 5kN, so the characteristic design and the number of the linear motors are enough to meet the traction force required by the magnetic suspension vehicle at the speed of 120km/h, and the traction acceleration is ensured; in addition, 8 linear motors in 4 power units are controlled by a set of traction system, so that the quantity of equipment below the vehicle body is reduced to the greatest extent on the premise of meeting the traction performance, the equipment arrangement space is saved, the burden of the vehicle is reduced, and the suspension capacity is improved.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (3)
1. A power configuration method for a medium-speed magnetic levitation traction system is characterized in that a set of traction system is adopted by a section of vehicle; the traction system comprises at least: a traction inverter;
6 suspension frames are configured on a section of vehicle, a linear motor is respectively arranged on the left side and the right side of 4 suspension frames in the middle of the 6 suspension frames of the vehicle, and 8 linear motors arranged on the left side and the right side of the 4 suspension frames in the middle are used as linear motor units;
4 linear motors on the same side of the middle 4 suspension frames are connected in series, and then the linear motors connected in series on the two sides are connected in parallel;
the input end of the linear motor unit is connected with the output end of the traction inverter;
the 6 suspension frames are symmetrically distributed in the middle of the section of the vehicle.
2. The method for dynamically configuring a medium speed magnetic levitation traction system according to claim 1, wherein the traction system further comprises: the system comprises a high-voltage distribution box, a high-voltage electrical cabinet, a reactor box and a three-phase auxiliary inverter; the high-voltage distribution box is connected with direct-current voltage from a substation through a current collector, the direct-current voltage is divided into six paths through a high-voltage electric appliance cabinet, the first path is input into a traction inverter after passing through a reactor, the second path is directly input into the traction inverter, the third path and the fourth path are connected with DC330V, and the fifth path and the sixth path are connected with a three-phase auxiliary inverter.
3. The method of claim 2, wherein the voltage across each linear motor is 275V.
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| CN201810722661.3A CN108638913B (en) | 2018-07-04 | 2018-07-04 | Power configuration method for medium-speed magnetic levitation traction system |
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| CN201810722661.3A CN108638913B (en) | 2018-07-04 | 2018-07-04 | Power configuration method for medium-speed magnetic levitation traction system |
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| CN108638913B true CN108638913B (en) | 2020-01-21 |
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| CN110435707A (en) * | 2019-07-24 | 2019-11-12 | 同济大学 | A kind of cloth load structure of medium-and low-speed maglev train levitation traction system |
| CN218876905U (en) * | 2022-09-15 | 2023-04-18 | 中车长春轨道客车股份有限公司 | Energy storage maglev vehicle auxiliary power supply system |
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| JP3787537B2 (en) * | 2002-07-08 | 2006-06-21 | 東海旅客鉄道株式会社 | Guide direction control device |
| CN1970333B (en) * | 2005-11-23 | 2010-08-18 | 阿尔斯通运输股份有限公司 | Vehicle suitable for moving along track |
| CN101624054B (en) * | 2009-08-06 | 2011-03-02 | 上海磁浮交通发展有限公司 | Travel structure of magnetic levitation type rail polling car |
| CN102136809B (en) * | 2011-03-31 | 2013-07-31 | 上海磁浮交通发展有限公司 | Urban rail maglev train traction converter output device |
| CN202389369U (en) * | 2012-01-13 | 2012-08-22 | 南车株洲电力机车有限公司 | Centralized power supply structure for traction system of middle-low-speed magnetically levitated train |
| CN104118333B (en) * | 2014-07-23 | 2016-09-14 | 中国人民解放军国防科学技术大学 | A kind of magnetic-levitation train line inductance electromotor pull strength method for improving |
| CN106740258A (en) * | 2017-01-03 | 2017-05-31 | 中车大连机车车辆有限公司 | Magnetic-levitation train linear electric motors power supply circuit and method |
| CN107539162A (en) * | 2017-09-13 | 2018-01-05 | 中车株洲电力机车有限公司 | A kind of medium-and low-speed maglev train traction system |
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