CN209454601U - A kind of off-network railway traction power supply system - Google Patents
A kind of off-network railway traction power supply system Download PDFInfo
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- CN209454601U CN209454601U CN201920047418.6U CN201920047418U CN209454601U CN 209454601 U CN209454601 U CN 209454601U CN 201920047418 U CN201920047418 U CN 201920047418U CN 209454601 U CN209454601 U CN 209454601U
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Abstract
The utility model discloses a kind of off-network railway traction power supply systems, including contact net, distributed generation resource substation, electric split-phase and electric split-phase switch, the output end of distributed generation resource substation to be connected to contact net；It is provided with electric split-phase on the contact net of adjacent distributions formula source substation, electric split-phase switch has been arranged in parallel in electric split-phase；Distributed generation resource substation includes level-one generation of electricity by new energy device, second level controllable type new energy backup power source and single-phase step-up transformer；Level-one generation of electricity by new energy device and second level controllable type new energy backup power source are mutually indepedent, and are connected to contact net by respective single-phase step-up transformer.The utility model realizes running from power network for train, improves the stability and reliability of microgrid rail traction power supply；Suitable for no barrier, on-site elimination clean energy resource realizes energy-saving and emission-reduction, the Green Sustainable of rail traffic；Meet the now widely used electric power vehicle of China railways, strong applicability.
Description
Technical field
The utility model belongs to traction power supply technical field more particularly to a kind of off-network railway traction power supply system.
Background technique
Currently, the railway cause in China is in fast-developing period, by the end of the year 2017, China railways revenue kilometres
12.74 ten thousand kilometers are reached, it is contemplated that the year two thousand twenty is up to 150,000 kilometers.In so fast-developing behind, there is increasingly tight
The problem of environmental pollution of weight and resource consumption.China railways year, electricity consumption was equivalent to annual consumption up to 40,000,000,000 kWh or more
16000000000 kilograms of standard coals.It, can be again by solar power generation, wind-power electricity generation and hydroelectric generation etc. with the development of clean energy resource over year
Raw energy access railway traction power supply system is the main path for solving the extensive energy consumption of railway.
The single-phase structure of tractive power supply system three-phase-and the part throttle characteristics of electric locomotive bring electric power quality
It influences.Traction load is single-phase load, generates negative-sequence current in system side, causes the imbalance of system three-phase voltage；Hand over-straight-
Friendship type electric locomotive uses Regenerative Braking Technology, regenerates energy foldback telegram in reply net, but because of its imbalance, will also cause system three
Phase voltage is uneven.Thus it powers in combination with clean energy resource and considers other traction power supply modes.
Have at present and apply micro-capacitance sensor research in fields such as electricity consumption from far-off regions, commercial business's electricity consumption, industry and campus electricity consumptions,
And the research for being applied to tractive power supply system is seldom.It is existing to need by electric power networks combination distributed generation resource inlet wire more
Rail traction power supply, cannot achieve real meaning off-network power supply, can not suitable for no entoilage area, be railway development and popularize
Bring great obstruction；And existing microgrid railway power system stability and unfailing performance are poor, and column can not be made with complete
Line without breakpoint smoothly takes stream from contact net, can not securely and reliably power in fact.
Utility model content
In order to overcome the shortcomings of art methods, the purpose of this utility model is that proposing that a kind of off-network rail traction supplies
Electric system can be realized the powered operation from power network of train, improve the stability of microgrid rail traction power supply and reliable
Property；Train without breakpoint can smoothly take stream from contact net；It not only can be adapted for no barrier, but also can be cleaned with on-site elimination
The energy realizes energy-saving and emission-reduction, the Green Sustainable of rail traffic；Meet the now widely used Electric Drive of China railways
Locomotive, strong applicability.
In order to achieve the above object, the utility model is using technical solution: a kind of off-network railway traction power supply system, including
Contact net, distributed generation resource substation, electric split-phase and electric split-phase switch, the output end of the distributed generation resource substation are connected to
Contact net is provided at least one set of distributed generation resource substation on the contact net；In the adjacent distributions formula power supply power transformation
It is provided with electric split-phase on the contact net stood, has been arranged in parallel electric split-phase switch in the electric split-phase；The distributed generation resource becomes
Power station includes level-one generation of electricity by new energy device, second level controllable type new energy backup power source and single-phase step-up transformer；The level-one
Generation of electricity by new energy device and second level controllable type new energy backup power source are mutually indepedent, and pass through respective single-phase step-up transformer
It is connected to contact net.
Further, the distributed generation resource substation includes direct current distributed power unit, exchange distributed generation resource
Unit, stored power unit and coordinated control unit, the direct current distributed power unit, exchange distributed power unit and storage
Energy power supply unit passes through respective single-phase step-up transformer respectively and is connected to the contact net, the coordinated control unit point side by side
It is not connected with direct current distributed power unit, the control terminal for exchanging distributed power unit and stored power unit.
Further, the direct current distributed power unit include direct current burning natural gas distributed power apparatus, DC-DC converter and
Single-phase inverter, the direct current burning natural gas distributed power apparatus first pass through DC-DC converter, then by single-phase inverter, by direct current
It is transformed to the alternating current of meet demand and is sent to its corresponding single-phase step-up transformer, passed after being boosted by single-phase step-up transformer
It is handed to contact net；
The exchange distributed power unit includes exchange burning natural gas distributed power apparatus, AC-DC rectifier and DC-AC inversion
Device, it is direct current that the exchange burning natural gas distributed power apparatus, which first passes through AC-DC rectifier rectification, then is converted by DC-AC inverter
For meet demand alternating current and be sent to its corresponding single-phase step-up transformer, be transferred to after being boosted by single-phase step-up transformer
Contact net；
The coordinated control unit is connected with the control terminal of single-phase inverter and DC-AC inverter respectively.
Further, the direct current burning natural gas distributed power apparatus includes fuel cell power source and/or photovoltaic cell power supply；Institute
Photovoltaic cell power supply is stated as level-one generation of electricity by new energy device, the fuel cell power source is spare as second level controllable type new energy
Power supply；
The exchange distributed generation resource includes gas turbine power supply, wind-power electricity generation electromechanical source and/or hydroelectric generation electromechanical source,
The wind-power electricity generation electromechanical source is as level-one generation of electricity by new energy device, and the hydroelectric generation electromechanical source is as level-one generation of electricity by new energy
Device, the gas turbine power supply is as second level controllable type new energy backup power source.
Further, the stored power unit includes that accumulation power supply, bidirectional DC-DC converter and two-way DC-AC become
Parallel operation carries out charge and discharge control to accumulation power supply by bidirectional DC-DC converter, carries out direct current by two-way DC-AC converter
To the conversion of the electric energy of exchange or AC-to DC；The control terminal of the bidirectional DC-DC converter is connected to coordinated control unit；Institute
State energy storage device and store energy at light load in load, release energy when overloaded in load, cooperate the power supply of other distributed generation resources with
Keep the balance of electric energy.
Further, the energy storage device includes batteries to store energy, superconducting energy storage, super capacitor energy-storage and/or flywheel
Energy storage.
Further, being additionally provided with external power supply conversion equipment on the contact net；Other needs are powered along the line
Equipment can take electricity from this system appropriate location.Electric locomotive mainly passes through Traction networks as load main in AC microgrids
Ac bus is single-phase takes electricity for connection；It is other along the line to need the equipment powered, equally can from the distributed generation system from
Appropriate location takes electricity.
Using the technical program the utility model has the advantages that
Use the clean energy resourcies such as fuel cell, miniature gas turbine, photovoltaic, wind-force, waterpower to be distributed in the utility model
The form of formula power supply accesses traction side, instead of original tractive power supply system by power system power supply；Become without traditional traction
Power station, distributed generation resource are connected in parallel on Traction networks by single-phase step-up transformer to locomotive power supply；A variety of distributed generation resource collaborations
More single clean energy resource is compared in power generation, improves the stability and reliability of power supply；The energy storage for configuring certain capacity simultaneously, can be right
Clean energy resource output power carries out " peak load shifting ", is lightly loaded the moment in railway, stores to remaining electric energy, provide when overloaded
Electric energy.In addition to this, the controllable flexible power supply of the offers such as fuel cell, miniature gas turbine is provided, guarantee system safety,
Stable operation.Multiple distributed generation resources and backup power source constitute AC microgrids and access contact net realization by single-phase step-up transformer
Power supply.Using the form of AC microgrids, distributed generation resource and energy storage are connected in parallel on ac bus to locomotive power supply, China is met
The now widely used electric power vehicle of railway, strong applicability.
It is closed the switch in the utility model by parallel with electric split-phase on route, distributed generation resource is simultaneously to both ends supply arm
It is powered, forms the off-network rail traction based on distributed power generation in the power supply zone of a distributed generation resource substation and supply
Electric system；The electric split-phase of traditional traction substation is eliminated, leads to phase splitting and matches combination switch, by distributed generation resource in parallel to line
Road carries out two supply arm power supplies, and train without breakpoint can smoothly take stream from contact net, reduce the loss of tractive force and speed,
The electric split-phase for avoiding hinge setting complicated is of great significance for reducing tractive force and speed loss, safe and reliable to train
Carry out uninterrupted power supply.In parallel with electric split-phase is closed the switch, distributed generation resource is incorporated to tractive power supply system, while to two
Supply arm is powered, and is formed the off-network rail traction based on distributed power generation in the power supply zone of a traction substation and is supplied
Electric system guarantees to interact between two substations.To the distributed generation resource of single-phase access, the coordination tune that can contribute
Degree improves the digestion capability of clean energy resource and the economy of system to realize optimized operation.
The utility model considers to carry out in combination with combined factors such as the resource distribution in location, geographical environment, traction loads
The type and quantity configuration of distributed generation resource；It not only can be adapted for no barrier, but also can be realized with on-site elimination clean energy resource
The energy-saving and emission-reduction of rail traffic, Green Sustainable.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of off-network railway traction power supply system of the utility model；
Fig. 2 is the structural schematic diagram of distributed generation resource substation in the utility model；
Wherein: 1 is contact net, and 2 be distributed generation resource substation, and 3 be electric split-phase, and 4 be electric split-phase switch, and 5 be single-phase liter
Pressure transformer；20 be coordinated control unit, and 21 be direct current burning natural gas distributed power apparatus, and 22 be exchange burning natural gas distributed power apparatus, and 23 are
Accumulation power supply, 24 be DC-DC converter, and 25 be single-phase inverter, and 26 be AC-DC rectifier, and 27 be DC-AC inverter, and 28 are
Bidirectional DC-DC converter, 29 be two-way DC-AC converter.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of utility model clearer, with reference to the accompanying drawing to the utility model
It is further elaborated.
In the present embodiment, shown in Figure 1, a kind of off-network railway traction power supply system, including contact net 1, distribution
Source substation 2, electric split-phase 3 and electric split-phase switch 4, the output end of the distributed generation resource substation 2 are connected to contact net 1,
At least one set of distributed generation resource substation 2 is provided on the contact net 1；In the adjacent distributions formula source substation 2
It is provided with electric split-phase 3 on contact net 1, has been arranged in parallel electric split-phase switch 4 in the electric split-phase 3；The distributed generation resource becomes
Power station 2 includes level-one generation of electricity by new energy device, second level controllable type new energy backup power source and single-phase step-up transformer 5；Described one
Grade generation of electricity by new energy device and second level controllable type new energy backup power source are mutually indepedent, and pass through respective single-phase step-up transformation
Device 5 is connected to contact net 1.
As the prioritization scheme of above-described embodiment, the distributed generation resource substation 2 include direct current distributed power unit,
Exchange distributed power unit, stored power unit and coordinated control unit 20, the direct current distributed power unit, exchange point
Cloth power supply unit and stored power unit pass through respective single-phase step-up transformer 5 respectively and are connected to the contact net 1 side by side,
The coordinated control unit 20 respectively with direct current distributed power unit, exchange distributed power unit and stored power unit
Control terminal is connected.
The direct current distributed power unit includes direct current burning natural gas distributed power apparatus 21, DC-DC converter 24 and single-phase inverse
Become device 25, the direct current burning natural gas distributed power apparatus 21 first passes through DC-DC converter 24, then by single-phase inverter 25, by direct current
Electricity is transformed to the alternating current of meet demand and is sent to its corresponding single-phase step-up transformer 5, is boosted by single-phase step-up transformer 5
After be transferred to contact net 1；
The exchange distributed power unit includes exchange burning natural gas distributed power apparatus 22, AC-DC rectifier 26 and DC-AC inverse
Become device 27, the exchange burning natural gas distributed power apparatus 22 first passes through AC-DC rectifier 26 and is rectified into direct current, then inverse by DC-AC
Become device 27 to be transformed to the alternating current of meet demand and be sent to its corresponding single-phase step-up transformer 5, by single-phase step-up transformer 5
Contact net 1 is transferred to after boosting；
The coordinated control unit 20 is connected with the control terminal of single-phase inverter 25 and DC-AC inverter 27 respectively.
The direct current burning natural gas distributed power apparatus 21 includes fuel cell power source and/or photovoltaic cell power supply；The photovoltaic electric
Pond power supply is as level-one generation of electricity by new energy device, and the fuel cell power source is as second level controllable type new energy backup power source；
The exchange distributed generation resource includes gas turbine power supply, wind-power electricity generation electromechanical source and/or hydroelectric generation electromechanical source,
The wind-power electricity generation electromechanical source is as level-one generation of electricity by new energy device, and the hydroelectric generation electromechanical source is as level-one generation of electricity by new energy
Device, the gas turbine power supply is as second level controllable type new energy backup power source.
As the prioritization scheme of above-described embodiment, the stored power unit includes accumulation power supply 23, bidirectional DC-DC converter
Device 28 and two-way DC-AC converter 29 carry out charge and discharge control to accumulation power supply 23 by bidirectional DC-DC converter 28, pass through
Two-way DC-AC converter 29 carries out direct current to the conversion of the electric energy of exchange or AC-to DC；The bidirectional DC-DC converter 28
Control terminal is connected to coordinated control unit 20；The energy storage device stores energy in load at light load, discharges when overloaded in load
Energy cooperates other distributed generation resource power supplies to keep the balance of electric energy；
The energy storage device includes batteries to store energy, superconducting energy storage, super capacitor energy-storage and/or flywheel energy storage.
As the prioritization scheme of above-described embodiment, external power supply conversion equipment is additionally provided on the contact net 1；Along the line
It is other to need the equipment powered that take electricity from this system appropriate location.Electric locomotive as load main in AC microgrids,
Mainly connect that ac bus is single-phase takes electricity by Traction networks；Other equipment for needing to power along the line, equally can be from point
Cloth electricity generation system takes electricity from appropriate location.
In order to better understand the utility model, primary complete description is made to the working principle of the utility model below:
AC microgrids are constituted by multiple distributed generation resources and backup power source, and contact net is accessed by single-phase step-up transformer
Realize power supply；
In parallel with electric split-phase on route to close the switch, distributed generation resource is simultaneously powered both ends supply arm, one
The off-network railway traction power supply system based on distributed power generation is formed in the power supply zone of a distributed generation resource substation；Pass through electricity
Split-phase matches combination switch, so that electric split-phase no longer had the function of split-phase, train can be completely without breakpoint smooth from contact net
Stream is taken, the loss of tractive force and speed is reduced, realizes power supply.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also
It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model
Claimed range is defined by the appending claims and its equivalent thereof.
Claims (7)
1. a kind of off-network railway traction power supply system, which is characterized in that including contact net (1), distributed generation resource substation (2),
Electric split-phase (3) and electric split-phase switch (4), the output end of the distributed generation resource substation (2) is connected to contact net (1), in institute
It states and is provided at least one set of distributed generation resource substation (2) on contact net (1)；In the adjacent distributions formula source substation (2)
Contact net (1) on be provided with electric split-phase (3), be arranged in parallel electric split-phase switch (4) on the electric split-phase (3)；Described point
Cloth source substation (2) includes that level-one generation of electricity by new energy device, second level controllable type new energy backup power source and single-phase step-up become
Depressor (5)；The level-one generation of electricity by new energy device and second level controllable type new energy backup power source are mutually indepedent, and by respective
Single-phase step-up transformer (5) be connected to contact net (1).
2. a kind of off-network railway traction power supply system according to claim 1, which is characterized in that the distributed generation resource becomes
Power station (2) includes direct current distributed power unit, exchange distributed power unit, stored power unit and coordinated control unit
(20), the direct current distributed power unit, exchange distributed power unit and stored power unit pass through respective list respectively
Phase step-up transformer (5) is connected to the contact net (1) side by side, the coordinated control unit (20) respectively with direct current distributed electrical
Source unit, exchange distributed power unit are connected with the control terminal of stored power unit.
3. a kind of off-network railway traction power supply system according to claim 2, which is characterized in that the direct current distributed electrical
Source unit includes direct current burning natural gas distributed power apparatus (21), DC-DC converter (24) and single-phase inverter (25), the direct current distribution
Formula power-supply device (21) first passes through DC-DC converter (24), then is to meet need by DC power conversion by single-phase inverter (25)
The alternating current asked simultaneously is sent to its corresponding single-phase step-up transformer (5), is connect by being transferred to after single-phase step-up transformer (5) boosting
It touches net (1)；
The exchange distributed power unit includes exchange burning natural gas distributed power apparatus (22), AC-DC rectifier (26) and DC-AC inverse
Become device (27), the exchange burning natural gas distributed power apparatus (22) first passes through AC-DC rectifier (26) and is rectified into direct current, then passes through
DC-AC inverter (27) is transformed to the alternating current of meet demand and is sent to its corresponding single-phase step-up transformer (5), by single-phase
Contact net (1) is transferred to after step-up transformer (5) boosting；
The coordinated control unit (20) is connected with the control terminal of single-phase inverter (25) and DC-AC inverter (27) respectively.
4. a kind of off-network railway traction power supply system according to claim 3, which is characterized in that the direct current distributed electrical
Source device (21) includes fuel cell power source and/or photovoltaic cell power supply；The photovoltaic cell power supply is sent out as level-one new energy
Electric installation, the fuel cell power source is as second level controllable type new energy backup power source；
The exchange distributed generation resource includes gas turbine power supply, wind-power electricity generation electromechanical source and/or hydroelectric generation electromechanical source, described
Wind-power electricity generation electromechanical source is filled as level-one generation of electricity by new energy device, the hydroelectric generation electromechanical source as level-one generation of electricity by new energy
It sets, the gas turbine power supply is as second level controllable type new energy backup power source.
5. according to a kind of off-network railway traction power supply system any in claim 2-4, which is characterized in that the energy storage
Power supply unit includes accumulation power supply (23), bidirectional DC-DC converter (28) and two-way DC-AC converter (29), passes through two-way DC-
DC converter (28) carries out charge and discharge control to accumulation power supply (23), carries out direct current to friendship by two-way DC-AC converter (29)
The conversion of the electric energy of stream or AC-to DC；The control terminal of the bidirectional DC-DC converter (28) is connected to coordinated control unit
(20)；The stored power unit stores energy in load at light load, releases energy when overloaded in load, cooperates other distributions
Power supply power supply is to keep the balance of electric energy.
6. a kind of off-network railway traction power supply system according to claim 5, which is characterized in that the stored power unit
Including batteries to store energy, superconducting energy storage, super capacitor energy-storage and/or flywheel energy storage.
7. a kind of off-network railway traction power supply system according to claim 1, which is characterized in that in the contact net (1)
On be additionally provided with external power supply conversion equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920047418.6U CN209454601U (en) | 2019-01-11 | 2019-01-11 | A kind of off-network railway traction power supply system |
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| CN201920047418.6U CN209454601U (en) | 2019-01-11 | 2019-01-11 | A kind of off-network railway traction power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
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2019
- 2019-01-11 CN CN201920047418.6U patent/CN209454601U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
| CN109606208B (en) * | 2019-01-11 | 2023-11-03 | 西南交通大学 | Off-grid railway traction power supply system and regulation and control method |
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