CN101633322B - Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid - Google Patents
Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid Download PDFInfo
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- CN101633322B CN101633322B CN2009101945958A CN200910194595A CN101633322B CN 101633322 B CN101633322 B CN 101633322B CN 2009101945958 A CN2009101945958 A CN 2009101945958A CN 200910194595 A CN200910194595 A CN 200910194595A CN 101633322 B CN101633322 B CN 101633322B
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Abstract
The invention relates to a magnetic-suspension tractive power supply system capable of feeding the braking energy back to a power grid, which belongs to power supply and comprises an original AC-DC conversion device and a four-quadrant converter, wherein the volume of the four-quadrant converter is below the half of the volume of the AC-DC conversion device; the AC end of the four-quadrant converter is respectively connected with the power grid and the AC end of the AC-DC conversion device, and the DC end of the four-quadrant converter is connected with the DC end of the AC-DC conversion device; a control device comprising a voltage sensor, a current sensor, a single chip or a digital signal processor is arranged to control the four-quadrant converter according to the following procedures: 1. detecting electric current at the AC side of the AC-DC conversion device; 2. judging whether the DC bus-bar voltage of the AC-DC conversion device is larger than a preset value or not; 3. starting up the four-quadrant converter to enter an inversion state when the DC bus-bar voltage is larger than the preset value; 4. detecting the input power of the four-quadrant converter; 5. judging whether the input power is positive or negative; 6. powering off the four-quadrant converter if the input power is positive; and 7. returning to the procedure 1.
Description
Technical field:
The invention belongs to the power supply of electric train, particularly about a kind of magnetic-suspension tractive electric power system that the train braking energy can be fed back to electrical network.
Background technology:
What be at present that the tractive power supply system of the operating high-speed maglev train of demonstration uses is by the diode not alternating continuous-current commutating machine that constitutes of control rectifier and Thyristor Controlled rectifier and the inverter of serial connection.Because the tractive power supply system that this alternating continuous-current commutating machine and series connected inverter are formed is in the train braking process, the electric energy of regeneration can't be fed back to electrical network for other use, so high-performance resistor can only be set ON TRAINS as deceleration loading, a large amount of regenerative electric energies is exhausted by the resistor discharge.The benefit of eliminating the energy of braking generation with the method for this resistor discharge is simple, but but a large amount of available regenerative electric energies are consumed in vain, this is not only the significant wastage to energy resource, and also the heat that produces because of conductive discharge can cause adverse influence to train and electric power system other parts normal operation.
The defective that expends in vain of braking energy for a change, Chinese patent ZL200410024636.6 has proposed a kind of tractive power supply system that the magnetic-levitation train braking energy can be fed back electrical network, and this tractive power supply system is replaced traditional diode not control rectifier and the series connected alternating continuous-current commutating machine of Thyristor Controlled rectifier with four quadrant convertor (PWM rectifier).Because four quadrant convertor has the ability of energy two-way flow, therefore work as train at glancing impact, the electric energy that braking energy can be produced not only can reduce the consumption of electric amount of electrical network voluntarily to the electrical network feedback, improve operation of power networks efficient, can also eliminate the harm that the train braking heat causes.But the price of the four quadrant convertor of same capacity is far above by the diode alternating continuous-current commutating machine formed of control rectifier and Thyristor Controlled rectifier not.Therefore, use with the four quadrant convertor of capacity replace in the existing magnetic-levitation train tractive power supply system the alternating continuous-current commutating machine investment that is connected into of control rectifier and Thyristor Controlled rectifier is not higher by diode.
Summary of the invention:
In the magnetic suspension traffic system, the braking energy of train that is in braking mode is less than the haulage capacity of traction state, perhaps by the traction converter plant of several high-speed maglev trains of same substation power supply totally one direct current bus, its braking energy can mainly be absorbed by other train that is in traction state like this, so the actual capacity that feeds back to the braking energy on the electrical network can be very not big, therefore can use the cheap special feeding braking energy back of four quadrant convertor of low capacity, control rectifier and the series connected alternating continuous-current commutating machine of Thyristor Controlled rectifier do not provide haulage capacity and keep former diode.For realizing this imagination, the then essential amount of capacity that solves four quadrant convertor, and being connected and the technical matters of control of four quadrant convertor and original alternating continuous-current commutating machine.
The technical scheme that the present invention solves the problems of the technologies described above is:
A kind of can be to the magnetic-suspension tractive electric power system of electrical network feeding braking energy back, comprise by the former diode three-phase four-quadrant current transformer of control rectifier and the series connected alternating continuous-current commutating machine of Thyristor Controlled rectifier, low capacity not, it is characterized in that: the capacity of the four quadrant convertor of this low capacity is below 1/2 of alternating continuous-current commutating machine capacity; The interchange end of this four quadrant convertor is connected with the interchange end of electrical network and alternating continuous-current commutating machine respectively by voltage transformer, and its dc terminal is connected with the dc terminal of this alternating continuous-current commutating machine; Be provided with the control setup that is become by voltage sensor, current sensor and micro controller system or bank of digital signal processors, the received current information of the DC bus-bar voltage information of the alternating continuous-current commutating machine that this micro controller system or digital signal processor will be obtained by voltage sensor and the three-phase four-quadrant current transformer that obtained by current sensor is handled the back as calculated by following programming control three-phase four-quadrant current transformer:
1. detect the alternating continuous-current commutating machine ac-side current;
2. differentiate the alternating continuous-current commutating machine DC bus-bar voltage, if return a last program less than preset value;
3. if, starting four quadrant convertor greater than preset value, DC bus-bar voltage enters inverter mode;
4. detect the four quadrant convertor horsepower input;
5. differentiate this horsepower input, if this power is the negative program of returning;
6. if this horsepower input for just, is closed four quadrant convertor;
7. return information 1.
Because the magnetic-suspension tractive electric power system dc voltage of existing AC-DC current converter is higher, consider the withstand voltage level of complete at present control device, this four quadrant convertor is the four quadrant convertor of series connection two-foldization, not only reduced the voltage that each switching valve bears in the four quadrant convertor, have only half of DC bus-bar voltage, and can improve the harmonic content that exchanges the end electric current.
The present invention has following beneficial effect:
1. the braking energy feedback electrical network of magnetic-levitation train glancing impact can be realized making full use of of regenerated energy, both reach energy-conservation purpose, good economic benefit and social benefit are arranged again.
2. the present invention is to original magnetic-suspension tractive electric power system, structure with any change is not arranged on circuit is connected, only increased the four quadrant convertor and the controller of low capacity, with regard to the recovery of practicable braking energy, thereby simplified the transformation process of entire equipment.
3. the four quadrant convertor of employing series connection two-foldization can reduce the stand under load voltage of its power switch pipe, has prolonged the service life of equipment, has guaranteed the safety and the reliability of equipment operation again.
4. the four quadrant convertor of series connection two-foldization can improve the current harmonic content that exchanges end, reduces total percent harmonic distortion that four limits resemble the current transformer received current.
Description of drawings:
Fig. 1 is a magnetic suspension train traction power supply constructional drawing of using the main line of growing up of the present invention.
Fig. 2 is a magnetic-levitation train tractive power supply system of the present invention.
Fig. 3 is the control program of controller.
Fig. 4 is series connection two-foldization three-phase four alike current transformers of the present invention.
The specific embodiment:
See also shown in Figure 1ly, this is one and uses the operation situation of the present invention on the main line of growing up.The magnetic floating traffic of this multiple line operation has uplink and downlink, therefore, has formed a up section and a descending section between two stations.Each substation is provided with can be to the two-way transmission of electricity module of the AC/DC of electrical network feeding braking energy back in the magnetic-suspension tractive electric power system, the two-way transmission of electricity module of this AC/DC is that middle mind-set operates in the train load power supply on two the up sections in these both sides, station and two the descending sections respectively by four DC/AC inversion modules with a station respectively, so as long as road along the line is provided with substation by the station sequence interval.
Fig. 2 is a magnetic-suspension tractive electric power system of the present invention, be AC/DC module and the DC/AC module among Fig. 1, wherein the AC/DC module be former magnetic-suspension tractive electric power system by diode not control rectifier and the series connected alternating continuous-current commutating machine 2 of Thyristor Controlled rectifier, adding the three-phase four-quadrant current transformer 4 of low capacity forms with the controller that comprises voltage sensor, current sensor and micro controller system or digital signal processor, inverter 3 is the DC/AC inversion module, directly is connected with load.Grow up the main line operation situation as can be known by shown in Figure 1, the capacity of this three-phase four-quadrant current transformer 4 is getting final product below 1/2 of these alternating continuous-current commutating machine 2 capacity, it exchanges end and is connected with the interchange end of electrical network 1 and alternating continuous-current commutating machine respectively by voltage transformer, its dc terminal is connected with the dc bus of the dc terminal of this alternating continuous-current commutating machine 2, common dc bus as the AC/DC module, the received current information of the three-phase four-quadrant current transformer that the DC bus-bar voltage information of the AC-DC switch 2 that its voltage sensor of these control setup 5 nationalitys obtains and current sensor obtain after its micro controller system or digital signal processor computing by the work of the three-phase four-quadrant current transformer 4 of control program control low capacity shown in Figure 3 whether, specific as follows:
1. detect the electric current of alternating continuous-current commutating machine 1 AC side;
2. whether differentiate DC bus-bar voltage greater than preset value; If be provided with, return a program greater than predetermined value;
3. if DC bus-bar voltage greater than preset value, illustrates that load has braking energy to need feedback, start three-phase four-quadrant current transformer 4 inversion programs, with the braking energy feedback electrical network;
4. detect three-phase four-quadrant current transformer 4 horsepower inputs;
5. differentiate the positive and negative of above-mentioned horsepower input, if negative power is returned a program;
6. if this horsepower input for just, stops the work of three-phase four-quadrant current transformer;
7. return information 1.
Because magnetic-suspension tractive electric power system dc voltage is higher at present, and the withstand voltage level of existing full control device is short of to some extent, the present invention has used the three-phase four-quadrant current transformer (seeing shown in Figure 4) of series connection two-foldization for this reason, the interchange endlap of two inverters is added and dc terminal is serial connection, the voltage that each power switch pipe bears in the inverter only is half of DC bus-bar voltage like this, and some harmonic wave can be offset mutually on the contrary because of phase place in the alternating-current voltage/AC voltage after the stack of the phase shift technology by carrier wave, reach the effect that reduces to exchange the end harmonic wave.
As in the magnetic-suspension tractive electric power system to the DC/AC of load direct supply inversion module, its quantity determined by the circulation line quantity of reality, the circuit of single track operation for example, and the DC/AC module only needs two, if this substation powers to five paths, five DC/AC modules should be arranged then.
Claims (2)
1. can be to the magnetic-suspension tractive electric power system of electrical network feeding braking energy back, comprise by the former diode three-phase four-quadrant current transformer of control rectifier and series connected alternating continuous-current commutating machine of Thyristor Controlled rectifier and low capacity not, it is characterized in that: the capacity of the four quadrant convertor of this low capacity is below 1/2 of alternating continuous-current commutating machine capacity; The interchange end of this four quadrant convertor is connected with the interchange end of electrical network and alternating continuous-current commutating machine respectively by voltage transformer, and its dc terminal is connected with the dc terminal of this alternating continuous-current commutating machine; Be provided with the control setup that is become by voltage sensor, current sensor and micro controller system or bank of digital signal processors, the received current information of the DC bus-bar voltage information of the alternating continuous-current commutating machine that this micro controller system or digital signal processor will be obtained by voltage sensor and the three-phase four-quadrant current transformer that obtained by current sensor is handled the back as calculated by following programming control four quadrant convertor:
1. detect the alternating continuous-current commutating machine ac-side current;
2. differentiate the alternating continuous-current commutating machine DC bus-bar voltage, if return a last program less than preset value;
3. if, starting four quadrant convertor greater than preset value, DC bus-bar voltage enters inverter mode;
4. detect the four quadrant convertor horsepower input;
5. differentiate this horsepower input, if this power is the negative program of returning;
6. if this horsepower input for just, is closed four quadrant convertor;
7. return information 1.
2. according to claim 1 can it is characterized in that to the magnetic-suspension tractive electric power system of electrical network feeding braking energy back: this three-phase four-quadrant current transformer is the three-phase four-quadrant current transformer of series connection two-foldization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101945958A CN101633322B (en) | 2009-08-26 | 2009-08-26 | Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101945958A CN101633322B (en) | 2009-08-26 | 2009-08-26 | Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid |
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| CN101633322A CN101633322A (en) | 2010-01-27 |
| CN101633322B true CN101633322B (en) | 2011-06-22 |
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| CN2009101945958A Expired - Fee Related CN101633322B (en) | 2009-08-26 | 2009-08-26 | Magnetic-suspension tractive power supply system capable of feeding braking energy back to power grid |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103153683B (en) * | 2010-03-15 | 2015-08-26 | 同济大学 | Braking energy management system and control method thereof |
| CN105790317B (en) * | 2016-04-29 | 2019-04-05 | 株洲中车时代电气股份有限公司 | A kind of rail traffic vehicles main circuit suitable for multiple power sources power supply |
| CN110018002A (en) * | 2019-03-08 | 2019-07-16 | 广州电力机车有限公司 | A kind of electric locomotive two-shipper trial operation system and method |
| CN110224158B (en) * | 2019-05-14 | 2024-08-20 | 中车青岛四方机车车辆股份有限公司 | High-speed maglev train power supply battery and power supply system |
| CN113602100B (en) * | 2021-08-05 | 2023-06-02 | 贾晶艳 | Power supply system, method, storage medium and processor for magnetic levitation train |
| CN114475255B (en) * | 2022-02-23 | 2023-08-08 | 中车青岛四方车辆研究所有限公司 | High-voltage on-load self-checking method and system for traction converter of railway vehicle |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583453A (en) * | 2004-05-25 | 2005-02-23 | 上海磁浮交通工程技术研究中心 | Rectifying filtering and reactive compensator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1583453A (en) * | 2004-05-25 | 2005-02-23 | 上海磁浮交通工程技术研究中心 | Rectifying filtering and reactive compensator |
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Owner name: TONGJI UNIVERSITY Free format text: FORMER OWNER: SHANGHAI MAGLEV TRANSPORTATION DEVELOPMENT CO., LTD. Effective date: 20150326 Free format text: FORMER OWNER: SHANGHAI MAGNETIC SUSPENSION COMMUNICATION ENGINEERING TECHNOLOGY RESEARCH CENTE Effective date: 20150326 |
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Free format text: CORRECT: ADDRESS; FROM: 201204 PUDONG NEW AREA, SHANGHAI TO: 200092 YANGPU, SHANGHAI |
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Effective date of registration: 20150326 Address after: 200092 Shanghai City, Yangpu District Siping Road No. 1239 Patentee after: Tongji University Address before: 201204 No. 2520, Pudong, Shanghai, Longyang Road Patentee before: Shanghai Maglev Transportation Development Co., Ltd. Patentee before: Shanghai Magnetic Suspension Communication Engineering Technology Research Cente |
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Granted publication date: 20110622 Termination date: 20160826 |
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| CF01 | Termination of patent right due to non-payment of annual fee |