CN107658862A - DC traction power-supply system based on new energy access - Google Patents
DC traction power-supply system based on new energy access Download PDFInfo
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- CN107658862A CN107658862A CN201710873281.5A CN201710873281A CN107658862A CN 107658862 A CN107658862 A CN 107658862A CN 201710873281 A CN201710873281 A CN 201710873281A CN 107658862 A CN107658862 A CN 107658862A
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- 238000012545 processing Methods 0.000 claims abstract description 28
- 230000009466 transformation Effects 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 11
- 230000006837 decompression Effects 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 3
- 238000000844 transformation Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 description 13
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
-
- 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
- B60L8/00—Electric propulsion with power supply from forces of nature, e.g. sun or wind
-
- 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
- B60L9/00—Electric propulsion with power supply external to the vehicle
-
- H02J3/383—
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The present invention provides a kind of DC traction power-supply system based on new energy access, should be included based on the DC traction power-supply system of new energy access：At least two traction power transformation circuits, at least two traction power transformation circuit in parallel are set；Each traction power transformation circuit includes solar panels and booster circuit；Wherein, the first end of solar panels and booster circuit connects；Second end of booster circuit is connected with the input of vehicle electric energy；Booster circuit is used to carry out boosting processing to the electric energy of DC voltage caused by solar energy, obtains the electric energy of predetermined DC voltage, and the electric energy of predetermined DC voltage is inputted to the input of vehicle electric energy.DC traction power-supply system provided by the invention based on new energy access, reduce the operation cost of urban track traffic.
Description
Technical field
The present invention relates to urban rail transit vehicles tractive power supply system technical field, more particularly to one kind to be based on new energy
The DC traction power-supply system of access.
Background technology
Urban track traffic has the advantages such as safety and comfort, handling capacity of passengers are big, the speed of service is fast, energy-conserving and environment-protective, and it is for solution
Certainly the urban congestion problem of getting worse plays an important role, thus as development construction urban track traffic it is essential because
Element.
In the prior art, in tractive power supply system, all supplies of electric power are all from external power grid, in tractive power supply system
Main transformer station is converted to the 110kV of external power grid alternating voltage 35kV alternating voltage, and by middle pressure ring net by 35kV's
Rectification circuit in AC voltages transmission to tractive power supply system, to be converted to 35kV alternating voltage by the rectification circuit
DC voltage needed for vehicle operation, so as to be the voltage needed for vehicle operation by the DC voltage.Wherein, when vehicle is run
In required voltage, power for traction amount accounts for 50% or so, and air conditioner is accounted for, Escalator with non-power for traction amounts such as, illuminations
50% or so.
However, using existing electric power system, the substantial amounts of electricity charge need to be paid to the circuit company for providing external power grid so that city
The operation cost of city's track traffic is higher.
The content of the invention
The present invention provides a kind of DC traction power-supply system based on new energy access, to reduce the fortune of urban track traffic
Seek cost.
The embodiment of the present invention provides a kind of DC traction power-supply system based on new energy access, including：
At least two traction power transformation circuits, at least two traction power transformations circuit in parallel are set；Each described traction
Power transformation circuit includes solar panels and booster circuit；
Wherein, the solar panels are connected with the first end of the booster circuit；Second end of the booster circuit and car
The input connection of electric energy；
The booster circuit is used to carry out boosting processing to the electric energy of DC voltage caused by the solar energy, is preset
The electric energy of DC voltage, and the electric energy of the predetermined DC voltage is inputted to the input of the vehicle electric energy.
In an embodiment of the present invention, the booster circuit is BOOST circuits.
In an embodiment of the present invention, the BOOST circuits include：
First inductance, the second inductance, the 3rd inductance, the first diode, the second diode, the 3rd diode, the first IGBT,
2nd IGBT, the 3rd IGBT and electric capacity；
Wherein, the first end of the first end of first inductance, the first end of second inductance and the 3rd inductance
Positive pole with the solar panels is connected；Second end of first inductance respectively with the input of first diode and
The first end connection of first IGBT；Second end of second inductance input with second diode and institute respectively
State the 2nd IGBT first end connection；Second end of the 3rd inductance respectively with the input of the 3rd diode and described
3rd IGBT first end connection；The output end of first diode, the output end of second diode and the described 3rd
First end of the output end of diode with the electric capacity is connected；The second end of first IGBT, the of the 2nd IGBT
Two ends and the second end of the 3rd IGBT are connected with the negative pole of the solar panels and the second end of the electric capacity.
In an embodiment of the present invention, the DC traction power-supply system based on new energy access also includes middle pressure ring
Net, the traction power transformation circuit also include：
Inverter circuit, the first end of the inverter circuit are connected with medium pressure looped network, the second end of the inverter circuit
It is connected respectively with the input of the vehicle electric energy and the second end of the booster circuit；
The inverter circuit is used for when the electric energy of the predeterminated voltage is more than required electric energy when the vehicle is run, to super
The electric energy of the predetermined DC voltage gone out carries out inversion and boosting processing, obtains the electric energy of default alternating voltage, and will be described default
The electric energy of alternating voltage is transmitted to medium pressure looped network；
The inverter circuit is additionally operable to carry out at inversion the electric energy of caused DC voltage in the vehicle braking procedure
Reason, the electric energy of default alternating voltage is obtained, and the electric energy of the default alternating voltage is transmitted to medium pressure looped network.
In an embodiment of the present invention, the inverter circuit is four-quadrant Current transform unit.
In an embodiment of the present invention, the four-quadrant Current transform unit includes：
Three-winding transformer, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance,
One four quadrant convertor and the second four quadrant convertor；
Wherein, the first end of the three-winding transformer is connected with medium pressure looped network, and the of the three-winding transformer
Two ends respectively the first end with the 4th inductance, the first end of the 5th inductance and the 6th inductance first end connect
Connect；3rd end of the three-winding transformer respectively the first end with the 7th inductance, the first end of the 8th inductance and
The first end connection of 9th inductance；Second end of the 4th inductance connects with the first end of first four quadrant convertor
Connect；Second end of the 5th inductance is connected with the second end of first four quadrant convertor；The second of 6th inductance
End and the three-terminal link of first four quadrant convertor；Second end of the 7th inductance and the second four-quadrant unsteady flow
The first end connection of device；Second end of the 8th inductance is connected with the second end of second four quadrant convertor；Described
Second end of nine inductance and the three-terminal link of second four quadrant convertor；4th end of first four quadrant convertor
It is connected with the 4th end of second four quadrant convertor；5th end of first four quadrant convertor and second four-quadrant
Limit the 5th end connection of current transformer.
In an embodiment of the present invention, the DC traction power-supply system based on new energy access also includes main transformer electricity
Institute, the traction power transformation circuit also include rectification circuit；
Wherein, the output end of the main transformer station is connected by the first end of medium pressure looped network and rectification circuit；It is described
Second end of rectification circuit is connected with the input of the vehicle electric energy；
Main transformer station is used to carry out decompression processing to the electric energy of the initial alternating voltage of outside input, obtains default alternating current
The electric energy of pressure, and transmitted the electric energy of the default alternating voltage to the rectification circuit by medium pressure looped network；
The rectification circuit is used to carry out step-down rectifier processing to the electric energy of the default alternating voltage, obtains predetermined DC
The electric energy of voltage, and the electric energy of the predetermined DC voltage is inputted to the input of the vehicle electric energy.
In an embodiment of the present invention, the rectification circuit is diode rectification unit circuit.
In an embodiment of the present invention, the diode rectification unit circuit includes：
First three winding phase-shifting transformer, the second three winding phase-shifting transformer, the first diode rectifier, the second diode
Rectifier；3rd diode rectifier and the 4th diode rectifier；
Wherein, the first end of the first three winding phase-shifting transformer and the first end of the second three winding phase-shifting transformer are equal
It is connected with medium pressure looped network；The of second end of the first three winding phase-shifting transformer and first diode rectifier
One end connects；3rd end of the first three winding phase-shifting transformer is connected with the first end of second diode rectifier；
Second end of the second three winding phase-shifting transformer is connected with the first end of the 3rd diode rectifier；Described 2nd 3
3rd end of winding phase-shifting transformer is connected with the first end of the 4th diode rectifier；First diode rectifier
The second end the second end with second diode rectifier, the second end of the 3rd diode rectifier and described respectively
The second end connection of 4th diode rectifier；3rd end of first diode rectifier respectively with second diode
3rd end at the 3rd end of rectifier, the 3rd end of the 3rd diode rectifier and the 4th diode rectifier connects
Connect.
In an embodiment of the present invention, the DC traction power-supply system based on new energy access also includes：
Contact net, the booster circuit are connected by the contact net with the input of the vehicle electric energy, the contact
Net is rigid contact net or rigid suspension OCS.
DC traction power-supply system provided in an embodiment of the present invention based on new energy access, should be based on new energy access
DC traction power-supply system includes：At least two traction power transformation circuits, at least two traction power transformation circuit in parallel are set；Each
Traction power transformation circuit includes solar panels and booster circuit；Booster circuit is used for the electric energy to DC voltage caused by solar energy
Boosting processing is carried out, obtains the electric energy of predetermined DC voltage, and the electric energy of predetermined DC voltage is inputted defeated to vehicle electric energy
Enter end.As can be seen here, in embodiments of the present invention, can be first by solar panels by setting solar panels and booster circuit
The electric energy of DC voltage is produced, then the electric energy of DC voltage caused by solar panels is carried out at boosting by the booster circuit
Reason, obtains the electric energy of predetermined DC voltage, so as to provide required electricity by the electric energy of the predetermined DC voltage for vehicle operation
Can, avoid to provide external power grid circuit company pay the substantial amounts of electricity charge, so as to reduce the operation of urban track traffic into
This.
Brief description of the drawings
Accompanying drawing herein is merged in specification and forms the part of this specification, shows the implementation for meeting the disclosure
Example, and be used to together with specification to explain the principle of the disclosure.
Fig. 1 is a kind of structural representation of DC traction power-supply system based on new energy access provided in an embodiment of the present invention
Figure；
Fig. 2 is a kind of structural representation of BOOST circuits provided in an embodiment of the present invention；
Fig. 3 is that the structure of another DC traction power-supply system based on new energy access provided in an embodiment of the present invention is shown
It is intended to；
Fig. 4 is a kind of structural representation for four-quadrant Current transform unit that inventive embodiments provide；
Fig. 5 is that the structure of another DC traction power-supply system based on new energy access provided in an embodiment of the present invention is shown
It is intended to；
Fig. 6 is a kind of structural representation of diode rectification unit circuit provided in an embodiment of the present invention.
Pass through above-mentioned accompanying drawing, it has been shown that the clear and definite embodiment of the disclosure, will hereinafter be described in more detail.These accompanying drawings
It is not intended to limit the scope of disclosure design by any mode with word description, but is by reference to specific embodiment
Those skilled in the art illustrate the concept of the disclosure.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the disclosure.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the disclosure.
Term " first ", " second ", " the 3rd " " in description and claims of this specification and above-mentioned accompanying drawing
The (if present)s such as four " are for distinguishing similar object, without for describing specific order or precedence.It should manage
The data that solution so uses can exchange in the appropriate case, so as to embodiments of the invention described herein for example can with except
Order beyond those for illustrating or describing herein is implemented.In addition, term " comprising " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, production
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for this
The intrinsic other steps of a little process, method, product or equipment or unit.
In existing tractive power supply system, all supplies of electric power are all from external power grid, therefore, need to be to offer external power grid
Circuit company pays the substantial amounts of electricity charge so that the operation cost of urban track traffic is higher.In order to reduce urban track traffic
Operation cost, the embodiments of the invention provide a kind of DC traction power-supply system based on new energy access, new energy should be based on
The DC traction power-supply system of access includes：At least two traction power transformation circuits, at least two traction power transformation circuit in parallel are set；
Each traction power transformation circuit includes solar panels and booster circuit；Booster circuit is used for DC voltage caused by solar energy
Electric energy carry out boosting processing, obtain the electric energy of predetermined DC voltage, and the electric energy of predetermined DC voltage is inputted to vehicle electrical
The input of energy.As can be seen here, in embodiments of the present invention, by setting solar panels and booster circuit, the sun can be passed through
Energy plate first produces the electric energy of DC voltage, then the electric energy of DC voltage caused by solar panels is risen by the booster circuit
Pressure processing, obtains the electric energy of predetermined DC voltage, needed for being run and providing for vehicle by the electric energy of the predetermined DC voltage
Electric energy, avoid to provide external power grid circuit company pay the substantial amounts of electricity charge, so as to reduce the fortune of urban track traffic
Seek cost.
How to be solved to the technical scheme of technical scheme and the application with specific embodiment below above-mentioned
Technical problem is described in detail.These specific embodiments can be combined with each other below, for same or analogous concept
Or process repeats no more in certain embodiments.Below in conjunction with accompanying drawing, embodiments of the invention are described.
Fig. 1 is that a kind of structure of DC traction power-supply system 10 based on new energy access provided in an embodiment of the present invention is shown
It is intended to, shown in Figure 1, certainly, the embodiment of the present invention simply illustrates by taking Fig. 1 as an example, but does not represent the present invention only
It is confined to this.The DC traction power-supply system 10 based on new energy access can include：
At least two traction power transformation circuits 101, at least two traction power transformation circuits 101 are arranged in parallel；Each traction becomes
Circuit 101 includes solar panels 1011 and booster circuit 1012.
Wherein, solar panels 1011 are connected with the first end of booster circuit 1012；Second end of booster circuit 1012 and car
The input connection of electric energy.
Booster circuit 1012 is used to carry out boosting processing to the electric energy of DC voltage caused by solar energy, obtains predetermined DC
The electric energy of voltage, and the electric energy of predetermined DC voltage is inputted to the input of vehicle electric energy.
Example, in embodiments of the present invention, the number of at least two traction power transformation circuits 101 is 10, specifically can root
It is configured according to the length of vehicle line, here, the number for drawing power transformation circuit 101, the present invention do not do specific limitation.
Example, in embodiments of the present invention, the magnitude of voltage of predetermined DC voltage can be 750V, or 1500,
It is of course also possible to be other values, it can be specifically configured according to being actually needed, as long as the electric energy of the predetermined DC voltage meets
Electric energy needed for vehicle operation, here, specially how many for the magnitude of voltage of predetermined DC voltage, the present invention does not do specific
Limitation.
In embodiments of the present invention, by setting solar panels 1011 and booster circuit 1012, its object is to：It can lead to
The electric energy of DC voltage can first be produced by crossing solar panel, then by the booster circuit 1012 to direct current caused by solar panels 1011
The electric energy of pressure carries out boosting processing, obtains direct current 750V or direct current 1500V electric energy, so as to pass through direct current 750V or direct current
1500V electric energy provides required electric energy for vehicle operation, avoids to the circuit company for providing external power grid and pays substantial amounts of electricity
Take, so as to reduce the operation cost of urban track traffic.
DC traction power-supply system 10 provided in an embodiment of the present invention based on new energy access, it should be accessed based on new energy
DC traction power-supply system 10 include：At least two traction power transformation circuits 101, at least two traction power transformation circuits 101 are in parallel
Set；Each traction power transformation circuit 101 includes solar panels 1011 and booster circuit 1012；Booster circuit 1012 be used for pair
The electric energy of DC voltage caused by solar energy carries out boosting processing, obtains the electric energy of predetermined DC voltage, and predetermined DC is electric
The electric energy of pressure is inputted to the input of vehicle electric energy.As can be seen here, in embodiments of the present invention, by setting solar panels 1011
With booster circuit 1012, the electric energy of DC voltage can be first produced by solar panels 1011, then pass through the booster circuit 1012
Boosting processing is carried out to the electric energy of DC voltage caused by solar panels 1011, obtains the electric energy of predetermined DC voltage, so as to logical
The electric energy for crossing the predetermined DC voltage provides required electric energy for vehicle operation, avoids and is paid to the circuit company for providing external power grid
The substantial amounts of electricity charge are received, so as to reduce the operation cost of urban track traffic.
Based on the embodiment shown in Fig. 1, optionally, booster circuit 1012 can be BOOST circuits, and BOOST circuits use
Triple Boost conversion, three Boost sub-circuits are connected in parallel, full symmetric in structure, are referred to described in Fig. 2, Fig. 2 is
A kind of structural representation of BOOST circuits provided in an embodiment of the present invention, certainly, the embodiment of the present invention simply enter by taking Fig. 2 as an example
Row explanation, but do not represent that present invention is limited only by this.The BOOST circuits can include：
First inductance, the second inductance, the 3rd inductance, the first diode, the second diode, the 3rd diode, the first insulation
Grid bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), the 2nd IGBT, the 3rd IGBT and electricity
Hold.
Wherein, the first end of the first end of the first inductance, the first end of the second inductance and the 3rd inductance is and solar panels
1011 positive pole connection；Second end of the first inductance connects with the input of the first diode and the first IGBT first end respectively
Connect；Second end of the second inductance is connected with the input of the second diode and the 2nd IGBT first end respectively；3rd inductance
Second end is connected with the input of the 3rd diode and the 3rd IGBT first end respectively；The output end of first diode, second
The output end of diode and the output end of the 3rd diode are connected with the first end of electric capacity；First IGBT the second end, second
IGBT the second end and the 3rd IGBT the second end are connected with the negative pole of solar panels 1011 and the second end of electric capacity.
By the BOOST circuits, boosting processing can be carried out to the electric energy of DC voltage caused by solar panels 1011, obtained
To direct current 750V or direct current 1500V electric energy, so as to be provided by direct current 750V or direct current 1500V electric energy for vehicle operation
Required electric energy, avoid to the circuit company for providing external power grid and pay the substantial amounts of electricity charge, so as to reduce urban track traffic
Operation cost.
Based on embodiment corresponding to Fig. 1 and Fig. 2, further, when electric energy caused by solar panels 1011 is transported beyond vehicle
During the required electric energy of row, should middle pressure ring net 102 can also be included based on DC traction power-supply system 10 of new energy access, traction
Power transformation circuit 101 can also include inverter circuit 1013, shown in Figure 3, and Fig. 3 is another kind provided in an embodiment of the present invention
The structural representation of DC traction power-supply system 10 based on new energy access, certainly, the embodiment of the present invention is simply by taking Fig. 3 as an example
Illustrate, but do not represent that present invention is limited only by this.The DC traction power-supply system 10 based on new energy access may be used also
With including：
Inverter circuit 1013, the first end of inverter circuit 1013 are connected with middle pressure ring net 102, and the second of inverter circuit 1013
End is connected with the input of vehicle electric energy and the second end of booster circuit 1012 respectively.
Inverter circuit 1013 is used for when the electric energy of predeterminated voltage is more than required electric energy when vehicle is run, to beyond it is default
The electric energy of DC voltage carries out inversion and boosting processing, obtains the electric energy of default alternating voltage, and by the electricity of default alternating voltage
It can transmit to middle pressure ring net 102.
Inverter circuit 1013 is additionally operable to carry out inversion processing to the electric energy of caused DC voltage in vehicle braking procedure, obtains
Transmitted to the electric energy of default alternating voltage, and by the electric energy of default alternating voltage to middle pressure ring net 102.
Example, the magnitude of voltage for presetting alternating voltage can be 35kV, can be specifically configured according to being actually needed,
This, the magnitude of voltage for presetting alternating voltage is how many, and the present invention, which is not done, further to be limited.
Example, in embodiments of the present invention, by setting inverter circuit 1013, its object is to：When solar energy produces
Electric energy when being more than the electric energy needed for vehicle operation, can by beyond electric energy carry out inversion and boosting and handle, exchanged
35kV electric energy, and the electric energy for exchanging 35kV is transmitted to middle pressure ring net 102 and recycled, further, it is also possible to by vehicle system
Caused electric energy carries out inversion and boosting processing during dynamic, obtains exchanging 35kV electric energy, and the electric energy for exchanging 35kV is passed
Transport to middle pressure ring net 102 to be recycled, so as to improve the utilization rate of electric energy.
Optionally, inverter circuit 1013 can be four-quadrant Current transform unit.Shown in Figure 4, Fig. 4 is inventive embodiments
A kind of structural representation of the four-quadrant Current transform unit provided, certainly, the embodiment of the present invention simply illustrate by taking Fig. 4 as an example,
But do not represent that present invention is limited only by this.The four-quadrant Current transform unit can include：
Three-winding transformer, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance,
One four quadrant convertor and the second four quadrant convertor.
Wherein, the first end of three-winding transformer is connected with middle pressure ring net 102, the second end of three-winding transformer respectively with
The first end connection of the first end of 4th inductance, the first end of the 5th inductance and the 6th inductance；3rd end of three-winding transformer
It is connected respectively with the first end, the first end of the 8th inductance and the first end of the 9th inductance of the 7th inductance；The second of 4th inductance
End is connected with the first end of the first four quadrant convertor；Second end of the 5th inductance connects with the second end of the first four quadrant convertor
Connect；Second end of the 6th inductance and the three-terminal link of the first four quadrant convertor；Second end of the 7th inductance and the second four-quadrant
Limit the first end connection of current transformer；Second end of the 8th inductance is connected with the second end of the second four quadrant convertor；9th inductance
The second end and the second four quadrant convertor three-terminal link；4th end of the first four quadrant convertor becomes with the second four-quadrant
Flow the 4th end connection of device；5th end of the first four quadrant convertor is connected with the 5th end of the second four quadrant convertor.
Based on any of the above-described embodiment, further, the DC traction power-supply system 10 based on new energy access can be with
Including main transformer station 103, traction power transformation circuit 101 also includes rectification circuit 1014, shown in Figure 5, and Fig. 5 is real for the present invention
The structural representation of another DC traction power-supply system 10 based on new energy access of example offer is applied, certainly, the present invention is real
Apply example simply to illustrate by taking Fig. 5 as an example, but do not represent that present invention is limited only by this.The direct current based on new energy access is led
Drawing electric power system 10 can also include：
The output end of main transformer station 103 is connected by middle pressure ring net 102 with the first end of rectification circuit 1014；Rectification circuit
1014 the second end is connected with the input of vehicle electric energy.
Main transformer station 103 is used to carry out decompression processing to the electric energy of the initial alternating voltage of outside input, obtains default friendship
The electric energy of voltage is flowed, and is transmitted the electric energy of default alternating voltage to rectification circuit 1014 by middle pressure ring net 102.
Rectification circuit 1014 is used to carry out step-down rectifier processing to the electric energy for presetting alternating voltage, obtains predetermined DC voltage
Electric energy, and the electric energy of predetermined DC voltage is inputted to the input of vehicle electric energy.
Example, the voltage of initial alternating voltage can be 110kV, and the initial alternating voltage of the 110kV can be by dispatch from foreign news agency
Source provides, and certainly, the embodiment of the present invention simply illustrates so that the voltage of initial alternating voltage can be 110kV as an example, but simultaneously
Do not represent that present invention is limited only by this.
Example, in embodiments of the present invention, by setting main transformer station 103 and rectification circuit 1014, its object is to：
Exchange 110kV that can be to outside input electric energy carries out decompression processing, obtains exchanging 35kV electric energy, and passes through middle pressure ring net
Exchange 35kV electric energy is transmitted to rectification circuit 1014, rectification circuit 1014 exchange 35kV electric energy is dropped by 102
Repoussage stream process, direct current 750V or direct current 1500V electric energy are obtained, and direct current 750V or direct current 1500V electric energy are inputted
To the input of vehicle electric energy, so as to realize when electric energy caused by solar energy is insufficient for the electric energy needed for vehicle operation,
Required electric energy is provided to vehicle by the main transformer station 103 and rectification circuit 1014.
Optionally, in embodiments of the present invention, rectification circuit 1014 can be diode rectification unit circuit, refer to figure
Shown in 6, Fig. 6 is a kind of structural representation of diode rectification unit circuit provided in an embodiment of the present invention, and certainly, the present invention is real
Apply example simply to illustrate by taking Fig. 6 as an example, but do not represent that present invention is limited only by this.The diode rectification unit circuit can be with
Including：
First three winding phase-shifting transformer, the second three winding phase-shifting transformer, the first diode rectifier, the second diode
Rectifier；3rd diode rectifier and the 4th diode rectifier.
Wherein, the first end of the first three winding phase-shifting transformer and the first end of the second three winding phase-shifting transformer are with
Pressure ring net 102 connects；Second end of the first three winding phase-shifting transformer is connected with the first end of the first diode rectifier；First
3rd end of three winding phase-shifting transformer is connected with the first end of the second diode rectifier；Second three winding phase-shifting transformer
Second end is connected with the first end of the 3rd diode rectifier；3rd end of the second three winding phase-shifting transformer and the 4th diode
The first end connection of rectifier；Second end of the first diode rectifier the second end with the second diode rectifier, respectively
Second end of three diode rectifiers and the second end connection of the 4th diode rectifier；3rd end of the first diode rectifier
The of the 3rd end with the second diode rectifier, the 3rd end of the 3rd diode rectifier and the 4th diode rectifier respectively
Three-terminal link.
Based on any of the above-described embodiment, optionally, should DC traction power-supply system 10 based on new energy access can be with
Including：
Contact net 104, booster circuit 1012 are connected by contact net 104 with the input of vehicle electric energy, and contact net 104 is
Rigid contact net 104 or rigid suspension OCS 104.
Example, in embodiments of the present invention, by setting contact net 104, its object is to：So that booster circuit 1012
Required electric energy can be provided to vehicle by the contact net 104, it is of course also possible to which so that rectification circuit 1014 passes through the contact
Net 104 provides required electric energy to vehicle.
In actual application, the electric energy of DC voltage can be first produced by solar panel, then by BOOST circuits to too
It is positive to carry out boosting processing by the electric energy of DC voltage caused by plate 1011, direct current 750V or direct current 1500V electric energy are obtained, so as to
Required electric energy is provided for vehicle operation by direct current 750V or direct current 1500V electric energy, is avoided to offer external power grid
Circuit company pays the substantial amounts of electricity charge, so as to reduce the operation cost of urban track traffic.When caused by solar panels 1011
When electric energy is beyond electric energy needed for vehicle operation, can by four-quadrant Current transform unit to beyond electric energy carry out inversion and boosting
Processing, obtain exchanging 35kV electric energy, and the electric energy for exchanging 35kV is transmitted to middle pressure ring net 102 and recycled, can be with
Caused electric energy in vehicle braking procedure is carried out by inversion by the four-quadrant Current transform unit and boosting is handled, obtains exchanging 35kV
Electric energy, and the electric energy for exchanging 35kV is transmitted to middle pressure ring net 102 and recycled, so as to improve the utilization rate of electric energy.
In addition, by setting exchange 110kV that main transformer station 103 can be to outside input electric energy to carry out decompression processing, exchanged
35kV electric energy, and transmitted exchange 35kV electric energy to diode rectification unit circuit by middle pressure ring net 102, two pole
Pipe Rectification Power Factor circuit carries out step-down rectifier processing to exchange 35kV electric energy, obtains direct current 750V or direct current 1500V electricity
Can, and direct current 750V or direct current 1500V electric energy are inputted to the input of vehicle electric energy, produced so as to realize in solar energy
Electric energy be insufficient for vehicle operation needed for electric energy when, carried by the main transformer station 103 and rectification circuit 1014 to vehicle
For required electric energy.
Those skilled in the art will readily occur to the disclosure its after considering specification and putting into practice invention disclosed herein
Its embodiment.It is contemplated that cover any modification, purposes or the adaptations of the disclosure, these modifications, purposes or
Person's adaptations follow the general principle of the disclosure and including the undocumented common knowledges in the art of the disclosure
Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the disclosure and spirit are by following
Claims are pointed out.
It should be appreciated that the precision architecture that the disclosure is not limited to be described above and is shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present disclosure is only limited by appended claims
System.
Claims (10)
- A kind of 1. DC traction power-supply system based on new energy access, it is characterised in that including：At least two traction power transformation circuits, at least two traction power transformations circuit in parallel are set；Each described traction power transformation Circuit includes solar panels and booster circuit；Wherein, the solar panels are connected with the first end of the booster circuit；Second end of the booster circuit and vehicle electrical The input connection of energy；The booster circuit is used to carry out boosting processing to the electric energy of DC voltage caused by the solar energy, obtains predetermined DC The electric energy of voltage, and the electric energy of the predetermined DC voltage is inputted to the input of the vehicle electric energy.
- 2. system according to claim 1, it is characterised in thatThe booster circuit is BOOST circuits.
- 3. system according to claim 2, it is characterised in that the BOOST circuits include：First inductance, the second inductance, the 3rd inductance, the first diode, the second diode, the 3rd diode, the first insulated gate are double Bipolar transistor IGBT, the 2nd IGBT, the 3rd IGBT and electric capacity；Wherein, the first end of the first end of first inductance, the first end of second inductance and the 3rd inductance with The positive pole connection of the solar panels；Second end of first inductance respectively with the input of first diode and described First IGBT first end connection；Second end of second inductance respectively with the input of second diode and described Two IGBT first end connection；Second end of the 3rd inductance input and the described 3rd with the 3rd diode respectively IGBT first end connection；The output end of first diode, the output end of second diode and the three or two pole First end of the output end of pipe with the electric capacity is connected；The second end, the second end of the 2nd IGBT of first IGBT And the second end of the 3rd IGBT is connected with the negative pole of the solar panels and the second end of the electric capacity.
- 4. system according to claim 1, it is characterised in that the DC traction power-supply system based on new energy access Also include middle pressure ring net, the traction power transformation circuit also includes：Inverter circuit, the first end of the inverter circuit are connected with medium pressure looped network, the second end difference of the inverter circuit It is connected with the input of the vehicle electric energy and the second end of the booster circuit；The inverter circuit be used for when the predeterminated voltage electric energy be more than the vehicle run when required electric energy when, to beyond The electric energy of predetermined DC voltage carries out inversion and boosting processing, obtains the electric energy of default alternating voltage, and by the default exchange The electric energy of voltage is transmitted to medium pressure looped network；The inverter circuit is additionally operable to carry out inversion processing to the electric energy of caused DC voltage in the vehicle braking procedure, obtains Transmitted to the electric energy of default alternating voltage, and by the electric energy of the default alternating voltage to medium pressure looped network.
- 5. system according to claim 4, it is characterised in thatThe inverter circuit is four-quadrant Current transform unit.
- 6. system according to claim 5, it is characterised in that the four-quadrant Current transform unit includes：Three-winding transformer, the 4th inductance, the 5th inductance, the 6th inductance, the 7th inductance, the 8th inductance, the 9th inductance, the one or four Quadrant convertor and the second four quadrant convertor；Wherein, the first end of the three-winding transformer is connected with medium pressure looped network, the second end of the three-winding transformer It is connected respectively with the first end, the first end of the 5th inductance and the first end of the 6th inductance of the 4th inductance；Institute State the 3rd end of the three-winding transformer first end with the 7th inductance, the first end of the 8th inductance and described respectively The first end connection of nine inductance；Second end of the 4th inductance is connected with the first end of first four quadrant convertor；Institute The second end for stating the 5th inductance is connected with the second end of first four quadrant convertor；Second end of the 6th inductance and institute State the three-terminal link of the first four quadrant convertor；The of second end of the 7th inductance and second four quadrant convertor One end connects；Second end of the 8th inductance is connected with the second end of second four quadrant convertor；9th inductance The second end and second four quadrant convertor three-terminal link；4th end of first four quadrant convertor with it is described The 4th end connection of second four quadrant convertor；5th end of first four quadrant convertor and the second four-quadrant unsteady flow The 5th end connection of device.
- 7. system according to claim 4, it is characterised in that the DC traction power-supply system based on new energy access Also include main transformer station, the traction power transformation circuit also includes rectification circuit；Wherein, the output end of the main transformer station is connected by the first end of medium pressure looped network and rectification circuit；The rectification Second end of circuit is connected with the input of the vehicle electric energy；Main transformer station is used to carry out decompression processing to the electric energy of the initial alternating voltage of outside input, obtains default alternating voltage Electric energy, and transmitted the electric energy of the default alternating voltage to the rectification circuit by medium pressure looped network；The rectification circuit is used to carry out step-down rectifier processing to the electric energy of the default alternating voltage, obtains predetermined DC voltage Electric energy, and the electric energy of the predetermined DC voltage is inputted to the input of the vehicle electric energy.
- 8. system according to claim 7, it is characterised in thatThe rectification circuit is diode rectification unit circuit.
- 9. system according to claim 8, it is characterised in that the diode rectification unit circuit includes：First three winding phase-shifting transformer, the second three winding phase-shifting transformer, the first diode rectifier, the second diode rectification Device；3rd diode rectifier and the 4th diode rectifier；Wherein, the first end of the first three winding phase-shifting transformer and the first end of the second three winding phase-shifting transformer be and institute State middle pressure ring net connection；Second end of the first three winding phase-shifting transformer and the first end of first diode rectifier Connection；3rd end of the first three winding phase-shifting transformer is connected with the first end of second diode rectifier；It is described Second end of the second three winding phase-shifting transformer is connected with the first end of the 3rd diode rectifier；Second three winding 3rd end of phase-shifting transformer is connected with the first end of the 4th diode rectifier；The of first diode rectifier Two ends the second end with second diode rectifier, the second end and the described 4th of the 3rd diode rectifier respectively The second end connection of diode rectifier；3rd end of first diode rectifier respectively with second diode rectification The 3rd end, the 3rd end of the 3rd diode rectifier and the three-terminal link of the 4th diode rectifier of device.
- 10. according to the system described in claim any one of 1-9, it is characterised in that also include：Contact net, the booster circuit are connected by the contact net with the input of the vehicle electric energy, and the contact net is Rigid contact net or rigid suspension OCS.
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| CN201710873281.5A CN107658862A (en) | 2017-09-25 | 2017-09-25 | DC traction power-supply system based on new energy access |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010026451A1 (en) * | 2010-07-08 | 2012-01-12 | Adensis Gmbh | Direct overhead traction line supply system for train, has inverter whose output terminals are attached to contact lines of electrically operated transportation network under interposition of single transformer |
| CN102651554A (en) * | 2011-02-24 | 2012-08-29 | 同济大学 | Control method and device for accessing energy-storage photovoltaic system into urban rail traction network |
| CN103166307A (en) * | 2011-12-15 | 2013-06-19 | 西安正昌电子有限责任公司 | Electric locomotive power supply system achieving complementation of solar energy and electric supply |
| CN204333980U (en) * | 2015-01-28 | 2015-05-13 | 沈阳铁道勘察设计院有限公司 | A kind of urban track traffic rectification and regenerative braking inversion feedback device |
| CN207200277U (en) * | 2017-09-25 | 2018-04-06 | 北京千驷驭电气有限公司 | DC traction power-supply system based on new energy access |
-
2017
- 2017-09-25 CN CN201710873281.5A patent/CN107658862A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010026451A1 (en) * | 2010-07-08 | 2012-01-12 | Adensis Gmbh | Direct overhead traction line supply system for train, has inverter whose output terminals are attached to contact lines of electrically operated transportation network under interposition of single transformer |
| CN102651554A (en) * | 2011-02-24 | 2012-08-29 | 同济大学 | Control method and device for accessing energy-storage photovoltaic system into urban rail traction network |
| CN103166307A (en) * | 2011-12-15 | 2013-06-19 | 西安正昌电子有限责任公司 | Electric locomotive power supply system achieving complementation of solar energy and electric supply |
| CN204333980U (en) * | 2015-01-28 | 2015-05-13 | 沈阳铁道勘察设计院有限公司 | A kind of urban track traffic rectification and regenerative braking inversion feedback device |
| CN207200277U (en) * | 2017-09-25 | 2018-04-06 | 北京千驷驭电气有限公司 | DC traction power-supply system based on new energy access |
Non-Patent Citations (2)
| Title |
|---|
| 王如竹等: "绿色建筑能源系统", 31 October 2013, 上海交通大学出版社, pages: 21 - 22 * |
| 雷慧杰等: "能馈式牵引供电原理及其在城市轨道交通中的应用", 31 July 2017, 北京交通大学出版社, pages: 222 - 223 * |
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