CN103434420A - Braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging - Google Patents
Braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging Download PDFInfo
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- CN103434420A CN103434420A CN2013103258966A CN201310325896A CN103434420A CN 103434420 A CN103434420 A CN 103434420A CN 2013103258966 A CN2013103258966 A CN 2013103258966A CN 201310325896 A CN201310325896 A CN 201310325896A CN 103434420 A CN103434420 A CN 103434420A
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Abstract
The invention discloses a braking energy recovery type DC (Direct Current) traction power supply system basing on electric automobile charging. The braking energy recovery type DC traction power supply system comprises more than two traction substations, wherein each traction substation is provided with more than one transformer which is connected to an AC (Alternating Current) bus, an output side of each transformer is correspondingly connected with a rectifier, output sides of all rectifiers are connected to DC buses of the traction transformers where the rectifiers are located, an anode and a cathode of each DC bus are respectively and correspondingly connected with a contact system and a steel rail, an anode and a cathode of an electric locomotive are respectively and correspondingly connected with the contact system and the steel rail, the contact system between adjacent traction substations is connected with one zoning station, two ends of the zoning station are respectively connected with the anodes of corresponding DC buses, the DC bus between two adjacent traction substations is provided with an electric automobile charge-discharge system, the electric automobile charge-discharge system is connected with the DC bus between the two adjacent traction substations, and thus a DC circular microgrid can be formed in one power supply zone. According to the braking energy recovery type DC traction power supply system disclosed by the invention, the reliability of the DC traction power supply system can be increased.
Description
Technical field
The present invention relates to a kind of DC traction power-supply system.Particularly relating to a kind of electricity that will change is the braking energy recovery type DC traction power-supply system based on charging electric vehicle that main electronlmobil charge-discharge system combines with DC traction power-supply system.
Background technology
Along with the fast development of economy and urbanization process, energy shock, environmental pollution and traffic congestion have become the serious problems that the world today faces.Urban electric vehicular traffic (subway, tramway train and trackless trolley car) and electronlmobil can be alleviated the day by day serious traffic congestion in city, reduce the consumption of limited fossil fuel, reduce aerial contamination, realizing the sustainable development in energy-saving and emission-reduction and city, is the main traffic instrument that future city is greatly developed.
The charge system that the development need of electronlmobil is corresponding, charge mode commonly used has three kinds of normal charge, fast charge and power batteries fast replacement systems (abbreviation changes electricity).For the urban public transport elec. vehicle, changing electricity is a kind of good charge mode.Charging system for electric automobile not only needs huge construction cost, and can produce many harmful effects to electric system.Simultaneously, electric automobile power battery is also an energy storage device that capacity is huge.
Traditional DC traction power-supply system adopts the diode rectifier power supply usually, and traction substation has one way feeding and two way feeding to the mode of contact system power supply.The voltage class of the DC supply of China GB regulation has two kinds of 750V and 1500V.The braking energy of electric locomotive consumes on braking resistor usually, and this has not only caused the waste of energy, but also can cause the rising of tunnel temperature, increases the burden of temperature control system, further causes the waste of the energy.The recycling of electric locomotive braking energy is the direction of tractive power supply system future development.
As shown in Figure 1, existing DC traction power-supply system includes: one or more for the traction substation 1 of direct current energy, this traction substation 1 are provided to electric locomotive 2, be to adopt traditional diode rectification DC traction power-supply system.Each traction substation 1 is to consist of voltage transformer 11, rectifier 12, DC bus 13, contact system 14, rail 15 and section post 16.Wherein, voltage transformer 11 can be the three winding transformer of two-winding transformer, three winding transformer or the former limit phase shift that adopts extend-triangle and connect ± 7.5 °.Rectifier 12 can be six Pulses Rectifiers, 12 Pulses Rectifiers or 24 Pulses Rectifiers.
But, existing DC traction power-supply system, at electric locomotive operation low ebb with during stopping transport, the power factor of AC Bulk Supply Substation is very low, need to take Measures of Reactive Compensation.
Summary of the invention
Technical matters to be solved by this invention is, a kind of braking energy recovery type DC traction power-supply system based on charging electric vehicle is provided, can reduce the fluctuation range of existing DC traction power-supply system vdc, realize the recycling of electric locomotive braking energy, the power factor of AC Bulk Supply Substation while improving DC traction power-supply system underload and zero load, improve the reliability of DC traction power-supply system, reduce the construction cost of charging system for electric automobile; The effect that electric power system is had to " peak load shifting ", can improve the economy of whole system.
The technical solution adopted in the present invention is: a kind of braking energy recovery type DC traction power-supply system based on charging electric vehicle, include plural for the traction substation of direct current energy is provided to electric locomotive, each traction substation is provided with the more than one voltage transformer be connected on ac bus, a rectifier of the corresponding connection of the outgoing side of each voltage transformer, the outgoing side of all rectifiers all is connected on the DC bus of be positioned at traction substation, the both positive and negative polarity of described DC bus is connected respectively contact system and rail, the both positive and negative polarity of described electric locomotive is connected respectively contact system and rail, be connected to a section post on the contact system of each traction substation, the two ends of described section post also connect respectively the positive pole of corresponding DC bus, be provided with the electronlmobil charge-discharge system on the DC bus between two adjacent traction substations, described electronlmobil charge-discharge system is connected with the DC bus of adjacent two traction substations, thereby form the micro-electrical network of direct current annular in a power supply zone.
The electronlmobil that described electronlmobil charge-discharge system includes on the DC bus that is connected to two adjacent traction substations discharges and recharges DC bus, is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine more than 1 on DC bus.
The mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine.
The mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine is ultracapacitor in parallel also.
A kind of braking energy recovery type DC traction power-supply system based on charging electric vehicle, include for the traction substation of direct current energy is provided to electric locomotive, described traction substation is provided with the more than one voltage transformer be connected on ac bus, a rectifier of the corresponding connection of the outgoing side of each voltage transformer, the outgoing side of all rectifiers all is connected on the DC bus of be positioned at traction substation, the both positive and negative polarity of described DC bus is connected respectively contact system and rail, the both positive and negative polarity of described electric locomotive is connected respectively contact system and rail, be provided with the electronlmobil charge-discharge system on described DC bus, the electronlmobil charge-discharge system is connected with the DC bus of traction substation, thereby form the micro-electrical network of direct current annular in a power supply zone.
The electronlmobil that described electronlmobil charge-discharge system includes and is connected on the DC bus of traction substation discharges and recharges DC bus, is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine more than 1 on DC bus.
The mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine.
The mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine is ultracapacitor in parallel also.
Braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention has following advantage:
Take full advantage of existing DC traction power-supply system, based on changing electricity, be the bidirectional transmission that main electronlmobil charge-discharge system has been realized energy: when electric locomotive traction moves, provide energy by traditional DC traction power-supply system and electric automobile power battery, can reduce the landing of DC bus-bar voltage; When the electric locomotive running under braking, utilize and change electricity for main electronlmobil charge-discharge system is electric automobile power battery charging, can reduce the rising of DC bus-bar voltage; When DC traction power-supply system underload and no-load run, utilize and change electricity for main electronlmobil charge-discharge system is electric automobile power battery charging, can improve the power factor of AC Bulk Supply Substation; When the AC network fault, if it is enough large to change the electronlmobil charge-discharge system capacity that electricity is the master, utilizes electric automobile power battery to pass through the electronlmobil charge-discharge system and power for DC traction power-supply system, can improve the reliability of DC traction power-supply system; Changing electricity is that main electronlmobil charge-discharge system has utilized existing DC traction power-supply system, thereby can reduce the construction cost of charging system for electric automobile; In addition, system also has the effect of " peak load shifting ", can improve the economy of whole system.
The accompanying drawing explanation
Fig. 1 is the structural representation of existing DC traction power-supply system;
Fig. 2 is the structural representation of the braking energy recovery type DC traction power-supply system of two way feeding of the present invention;
Fig. 3 is the structural representation of the braking energy recovery type DC traction power-supply system of one way feeding of the present invention.
In figure
1: traction substation 2: electric locomotive
3: electronlmobil charge-discharge system 4: ac bus
11: voltage transformer 12: rectifier
13: DC bus 14: contact system
15: rail 16: section post
31: electronlmobil discharges and recharges DC bus 32: the two-way DC-DC charge-discharge machine
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention is described in detail.
As shown in Figure 2, braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention, in the situation that a plurality of traction substations, for the braking energy recovery type DC traction power-supply system of two way feeding, including plural is to adopt traditional diode rectification DC traction power-supply system for the traction substation 1 of direct current energy, this traction substation 1 are provided to electric locomotive 2.Each traction substation 1 is provided with the more than one voltage transformer 11 be connected on ac bus 4, a rectifier 12 of the corresponding connection of the outgoing side of each voltage transformer 11, the outgoing side of all rectifiers 12 all is connected on the DC bus 13 of be positioned at traction substation 1, the both positive and negative polarity of described DC bus 13 is connected respectively contact system 14 and rail 15, the both positive and negative polarity of described electric locomotive 2 is connected respectively contact system 14 and rail 15, all be connected to a section post 16 on the contact system 14 of a traction substation 1, the two ends of described section post 16 also connect respectively the positive pole of corresponding DC bus 13.Wherein, voltage transformer 11 can be the three winding transformer of two-winding transformer, three winding transformer or the former limit phase shift that adopts extend-triangle and connect ± 7.5 °.Rectifier 12 can be six Pulses Rectifiers, 12 Pulses Rectifiers or 24 Pulses Rectifiers.Although provided two voltage transformers and two rectifiers in Fig. 2, its number is not only limited to two.In Fig. 2, electric locomotive 2 is adjacent two loads that traction substation 1 is common.The present invention is provided with electronlmobil charge-discharge system 3 on the DC bus 13 between two adjacent traction substations 1, electronlmobil charge-discharge system 3 is connected with the DC bus 13 of adjacent two traction substations 1, thereby forms the micro-electrical network of direct current annular in a power supply zone.
The described electricity that changes is that the electronlmobil that main electronlmobil charge-discharge system 3 includes on the DC bus 13 that is connected to two adjacent traction substations 1 discharges and recharges DC bus 31, is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine 32 more than 1 on DC bus 31.The mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine 32.And, be to improve the dynamic property of system, at the mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine 32 ultracapacitor in parallel also.
As shown in Figure 3, braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention, an in the situation that traction substation, for the braking energy recovery type DC traction power-supply system of one way feeding, include for the traction substation 1 of direct current energy is provided to electric locomotive 2, described traction substation 1 is provided with the more than one voltage transformer 11 be connected on ac bus 4, a rectifier 12 of the corresponding connection of the outgoing side of each voltage transformer 11, the outgoing side of all rectifiers 12 all is connected on the DC bus 13 of traction substation 1, the both positive and negative polarity of described DC bus 13 is connected respectively contact system 14 and rail 15, the both positive and negative polarity of described electric locomotive 2 is connected respectively contact system 14 and rail 15.Wherein, voltage transformer 11 can be the three winding transformer of two-winding transformer, three winding transformer or the former limit phase shift that adopts extend-triangle and connect ± 7.5 °.Rectifier 12 can be six Pulses Rectifiers, 12 Pulses Rectifiers or 24 Pulses Rectifiers.Although provided two voltage transformers and two rectifiers in Fig. 3, its number is not only limited to two.The present invention is provided with electronlmobil charge-discharge system 3 on described DC bus 13, and electronlmobil charge-discharge system 3 is connected with the DC bus 13 of traction substation 1, thereby forms the micro-electrical network of direct current annular in a power supply zone.
The electronlmobil that described electronlmobil charge-discharge system 3 includes and is connected on the DC bus 13 of traction substation 1 discharges and recharges DC bus 31, is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine 32 more than 1 on DC bus 31.The mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine 32.And, be to improve the dynamic property of system, at the mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine 32 ultracapacitor in parallel (not shown in FIG.) also.The present invention by traditional diode rectification DC traction power-supply system, to change electricity be that main electronlmobil charge-discharge system and electric automobile power battery forms the annular micro-electrical network of direct current in a power supply zone by DC bus.
The technical scheme that Fig. 3 is given, both be applicable to the braking energy recovery type DC traction power-supply system of one way feeding, also is applicable to the braking energy recovery type DC traction power-supply system of two way feeding.
Braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention, the direct current contact system is connected with the direct current output cathode of DC traction substation, adopt overhead contact line to power to electric locomotive, rail is connected with the direct current output negative pole of DC traction substation, for realizing rail return current.Except adopting the contact system power supply, also can adopt the 3rd rail power supply.Rail adopts to suspend and installs, to reduce the electrolytic corrosion to underground utilities.
The principle of work of the braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention is, when electric locomotive braking causes that DC bus-bar voltage raises and while reaching limited voltage threshold, the electronlmobil charge-discharge system to electric automobile power battery charging, surpasses limit value to avoid DC bus-bar voltage by two-way DC-DC charge-discharge machine 32; When the electric locomotive operation causes DC bus-bar voltage to be reduced to limited voltage threshold, electric automobile power battery passes through two-way DC-DC charge-discharge machine 32 to DC bus powered, to avoid DC bus-bar voltage lower than limit value.At electric locomotive operation low ebb with during stopping transport, by this electric power system, it is electric automobile power battery charging, when meeting electric automobile power battery charging, also solved DC traction power-supply system when underload and zero load, the problem that AC Bulk Supply Substation power factor significantly reduces.If it is enough large to change electricity and be main electronlmobil charge-discharge system capacity,, when the AC network fault, can be that main electronlmobil charge-discharge system be the electric locomotive power supply by changing electricity.
Therefore, by changing electricity, be that the coordination that main electronlmobil charge-discharge system and electric automobile power battery discharge and recharge is controlled, not only realized the recycling of electric locomotive braking energy, stabilized the fluctuation of DC bus-bar voltage, and utilize DC traction power-supply system when underload and zero load, for electric automobile power battery charging, solved the problem that DC traction power-supply system AC Bulk Supply Substation power factor significantly reduces.If it is enough large to change electricity and be main electronlmobil charge-discharge system capacity,, when the AC network fault, can be that main electronlmobil charge-discharge system be the electric locomotive power supply by changing electricity, thereby have improved the reliability of DC traction power-supply system.Also take full advantage of DC traction power-supply system and greatly reduce the construction cost of changing the charging system for electric automobile that electricity is the master, electric power system is there is to the effect of " peak load shifting ", and then improved economy and the comprehensive utilization benefit of whole system simultaneously.
The control command that discharges and recharges of the electronlmobil charge-discharge system in the braking energy recovery type DC traction power-supply system based on charging electric vehicle of the present invention can be given by communication system by control center, also can be given according to DC bus-bar voltage.
Claims (8)
1. the braking energy recovery type DC traction power-supply system based on charging electric vehicle, include plural for the traction substation (1) of direct current energy is provided to electric locomotive (2), each traction substation (1) is provided with the more than one voltage transformer (11) be connected on ac bus (4), the corresponding rectifier (12) that connects of the outgoing side of each voltage transformer (11), the outgoing side of all rectifiers (12) all is connected on the DC bus (13) of be positioned at traction substation (1), the both positive and negative polarity of described DC bus (13) is connected respectively contact system (14) and rail (15), the both positive and negative polarity of described electric locomotive (2) is connected respectively contact system (14) and rail (15), be connected to a section post (16) on the contact system (14) of each traction substation (1), the two ends of described section post (16) also connect respectively the positive pole of corresponding DC bus (13), it is characterized in that, be provided with electronlmobil charge-discharge system (3) on the DC bus (13) between adjacent two traction substations (1), described electronlmobil charge-discharge system (3) is connected with the DC bus (13) of adjacent two traction substations (1), thereby form the micro-electrical network of direct current annular in a power supply zone.
2. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 1, it is characterized in that, the electronlmobil that described electronlmobil charge-discharge system (3) includes on the DC bus (13) that is connected to adjacent two traction substations (1) discharges and recharges DC bus (31), is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine (32) more than 1 on DC bus (31).
3. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 2, is characterized in that, the mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine (32).
4. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 3, it is characterized in that, the mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine (32) is ultracapacitor in parallel also.
5. the braking energy recovery type DC traction power-supply system based on charging electric vehicle, include for the traction substation (1) of direct current energy is provided to electric locomotive (2), described traction substation (1) is provided with the more than one voltage transformer (11) be connected on ac bus (4), the corresponding rectifier (12) that connects of the outgoing side of each voltage transformer (11), the outgoing side of all rectifiers (12) all is connected on the DC bus (13) of be positioned at traction substation (1), the both positive and negative polarity of described DC bus (13) is connected respectively contact system (14) and rail (15), the both positive and negative polarity of described electric locomotive (2) is connected respectively contact system (14) and rail (15), it is characterized in that, be provided with electronlmobil charge-discharge system (3) on described DC bus (13), electronlmobil charge-discharge system (3) is connected with the DC bus (13) of traction substation (1), thereby form the micro-electrical network of direct current annular in a power supply zone.
6. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 5, it is characterized in that, the electronlmobil that described electronlmobil charge-discharge system (3) includes and is connected on the DC bus (13) of traction substation (1) discharges and recharges DC bus (31), is connected to electronlmobil and discharges and recharges the two-way DC-DC charge-discharge machine (32) more than 1 on DC bus (31).
7. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 6, is characterized in that, the mouth connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine (32).
8. the braking energy recovery type DC traction power-supply system based on charging electric vehicle according to claim 7, it is characterized in that, the mouth of the connecting electric automobile electrokinetic cell of described each two-way DC-DC charge-discharge machine (32) is ultracapacitor in parallel also.
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| CN106809031A (en) * | 2016-09-21 | 2017-06-09 | 比亚迪股份有限公司 | The braking recovery system of train, the control centre for train scheduling and method |
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| CN106809023A (en) * | 2016-09-21 | 2017-06-09 | 比亚迪股份有限公司 | The braking recovery system and method and train of train |
| CN106329901B (en) * | 2016-11-21 | 2018-10-16 | 广东美的制冷设备有限公司 | Overcurrent protection peripheral circuit and electrical equipment |
| CN106329901A (en) * | 2016-11-21 | 2017-01-11 | 广东美的制冷设备有限公司 | Overcurrent protective peripheral circuit and electric device |
| CN107612065A (en) * | 2017-09-15 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | The dispatching method of the concentrating type DC charging system of restructural ring busbars |
| CN111347941A (en) * | 2018-12-20 | 2020-06-30 | 比亚迪股份有限公司 | Auxiliary power supply system for railway vehicle and control method thereof |
| CN111347941B (en) * | 2018-12-20 | 2022-03-18 | 比亚迪股份有限公司 | Auxiliary power supply system for railway vehicle and control method thereof |
| CN111740438A (en) * | 2020-06-16 | 2020-10-02 | 同济大学 | Urban rail transit regenerative braking energy management and control system and control method thereof |
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