CN209505511U - A kind of electric railway traction net powered construction - Google Patents
A kind of electric railway traction net powered construction Download PDFInfo
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- CN209505511U CN209505511U CN201920120438.1U CN201920120438U CN209505511U CN 209505511 U CN209505511 U CN 209505511U CN 201920120438 U CN201920120438 U CN 201920120438U CN 209505511 U CN209505511 U CN 209505511U
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Abstract
The utility model discloses a kind of electric railway traction net powered constructions, belong to Traction networks power supply technique field.Including Traction networks and the ac bus and DC bus drawn from traction substation, wherein, photovoltaic generating system is connect by straight convertor with DC bus, regenerating braking energy is connect by Multiple coil step-down transformer with rectifier with DC bus, energy-storage system of accumulator is connect by straight convertor with DC bus, super capacitor energy-storage system is connect by straight convertor with DC bus, Traction networks are connect by inverter and straight convertor with DC bus, and DC load is connect by straight convertor with DC bus；Wind generator system is connect by transformer with ac bus, and AC load is connect by transformer with ac bus；It is connected between ac bus and DC bus by reversible transducer.
Description
Technical field
The utility model belongs to electric railway traction net power supply technique field.
Background technique
Railways are derived from 110kV three-phase alternating current bus in railway power system traditional at present, on the one hand match by change
It is that Along Railway load is powered that the three-phase transformer of electric institute, which is depressurized to after 10kV and is output to through track, on the other hand by drawing change
Three-phase-two-phase tractive transformer of electric institute is output to Traction networks as train power supply.
Although the power supply-distribution system structure of existing railway is simple, its compared to utility network 10kV distribution system,
Load is relatively simple, load factor is not high, no-load loss is big.Especially currently greatly developing renewable energy substitution fossil energy
Source reduces carbon emission, and under the main trend for realizing " energy transition ", renewable energy power generation technical research continues deeply, renewable
Variety of energy sources and application form also become increasingly complicated, and distributed power generation is by its low pollution, low cost and infield spirit
The features such as living, the specific gravity in power distribution network rose year by year, and distributed power generation and system integration technology also obtain improved day by day.So
And existing railway power supply-distribution system voltage transformation all relies on transformer, and power flow is single, it is difficult to energy-storage system is accessed, it can
The renewable sources of energy also hardly result in utilization within the system.In addition, Traction networks are completely isolated with through track, on Traction networks largely again
Raw braking energy is also difficult to be fully used.Therefore there is an urgent need to upgrade for traditional railway power supply-distribution system.
The utility model proposes railway traction net powered construction scheme, can solve or improve the above problem.
Utility model content
The purpose of the utility model is to provide a kind of electric railway traction net powered constructions out, it can be efficiently solved not
Same type plant-grid connection Traction networks and the technical issues of to AC and DC load supplying.
The purpose of this utility model is achieved through the following technical solutions: a kind of electric railway traction net power supply structure
It makes, including Traction networks TC and the ac bus AC-BUS and DC bus DC-BUS that are drawn from traction substation, battery storage
Energy system BAT and super capacitor energy-storage system SC and photovoltaic generating system PV-DC is female by straight convertor DC/DC and direct current
Line connection, regenerating braking energy RE-E are connect with rectifier AC/DC with DC bus by Multiple coil step-down transformer MU-T, are led
Draw net TC to connect by inverter DC/AC and straight convertor DC/DC with DC bus, DC load DC-L passes through straight transformation
Device DC/DC is connect with DC bus DC-BUS, wind generator system WT-AC and AC load AC-L by transformer AC/AC with
Ac bus connection.
The purpose of this utility model is realized by following control: when without regenerative braking RE-E, by photovoltaic generating system
PV-DC and wind generator system WT-AC to Traction networks TC and hands over AC-L, DC load DC-L output power with maximum power, stores
Battery energy storage system BAT is operated by charge/discharge adjusts DC bus DC-BUS voltage, and super capacitor energy-storage system SC is in prison
Control AC and DC bus state.When having regenerative braking, photovoltaic generating system and wind generator system stop to Traction networks TC and hand over,
DC load output power, super capacitor charging absorb power, super capacitor electric discharge output power, electric power storage after regenerative braking
Pond is in monitoring AC and DC bus state.
It is connected between the ac bus AC-BUS and DC bus DC-BUS by reversible transducer Bid-C.
Compared with prior art, the utility model has the following beneficial effects:
1, the utility model proposes electric railway traction net powered construction scheme, both convenient for AC and DC power supply access,
It can also power to AC and DC load, reduce power supply process power conversion links；
2, the utility model proposes electric railway traction net powered construction scheme, can according to exchange bulk power grid run feelings
Condition realizes that grid-connect mode and island mode switch；
3, the utility model proposes electric railway traction net powered construction scheme, be based on two-way AC/DC power flowcontrol
The bi-directional power flow function of device is, it can be achieved that exchange subnet is mutually supported with direct current subnet power.
Therefore, the utility model constitute alternating current-direct current mixing micro-capacitance sensor have both direct-current grid with exchange the excellent of micro-capacitance sensor
Gesture can more efficiently optimize different type power supply, load and energy storage and configure.Can with load have high controllability and flexibly
Property, high reliablity, power quality it is high, can independently meet the access of all kinds of renewable energy, energy-storage system and polynary load, simultaneously
Make full use of the electric railway traction net power supply system of railway traction net regenerating braking energy.Railway confession can be improved in the system
Power quality, reliability, economy and the operational efficiency of distribution system.The utility model passes through design photovoltaic, wind energy, regeneration system
The scheme of energy and energy-storage system access power network, proposes electric railway traction net powered construction structure.Wherein light
Photovoltaic generating system, rechargeable energy and energy-storage system are connected on DC bus, for Traction networks load and Along Railway Partial DC
Load supplying；Wind power generation system and power distribution network access ac bus, power for Along Railway part AC load, simultaneity factor
It can also be to power distribution network output power.
Detailed description of the invention
Fig. 1 is a kind of electric railway traction net powered construction figure of the utility model.
Fig. 2 is that the regenerative braking of the utility model accesses DC bus circuit topology figure.
Fig. 3 is that the Traction networks of the utility model access DC bus circuit topology figure.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail.The exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Fig. 1 is a kind of electric railway traction net powered construction, which contains ac bus and DC bus simultaneously,
While for railway 10kV through track, the power supply of railway 27.5kV Traction networks, moreover it is possible to independently meet all kinds of renewable energy power generations
System, the access of energy-storage system and polynary load and making full use of for realization railway traction net regenerating braking energy.Specific knot
Structure includes: the grid-connected power generation systems such as photovoltaic, wind-force and the renewable energy system that regenerating braking energy is constituted；Battery surpasses
The energy-storage system that grade capacitor is constituted；All kinds of DC loads and AC load come from different backgrounds and possess different abilities load system；Ac bus and direct current are female
Line；The wherein specific cut-in method of each section:
A, photovoltaic generating system is connect by straight convertor DC/DC with DC bus DC-BUS, and straight convertor uses
The direct current that the low-voltage DC that photovoltaic cell exports is transformed to stable high voltage grade by Closed-loop Control Strategy is electrically accessed DC-
BUS；Wind generator system is connect by transformer AC/AC with ac bus AC-BUS；Regenerative braking shown in Fig. 2 accesses direct current
Bus circuit can realize that the timely consumption of regenerating braking energy utilizes, and regenerating braking energy passes through Multiple coil step-down transformer MTU-
1 connect with rectifier AC/DC with DC bus, and wherein the decompression of 27.5kV alternating current is that 4 tunnels are lower by multiwinding transformer MTU-1
The alternating current of voltage class accesses after rectifier AC/DC AC rectification being electrically accessed DC-BUS for direct current, and rectifier is used and closed
Ring control strategy guarantees the voltage stabilization of output direct current.
B, energy-storage system of accumulator BAT is connect by straight convertor DC/DC with DC bus, passes through the charge and discharge of battery
Electricity can guarantee power supply continuity of the user when having a power failure the short time, and play the role of stabilizing power network fluctuation, guarantee that direct current is female
The stabilization of line voltage；Super capacitor energy-storage system SC is connect by straight convertor DC/DC with DC bus, in regenerative braking energy
It is adjusted when measuring excessive, reduces the impact to DC bus-bar voltage.
C, DC load is connect by straight convertor DC/DC with DC bus DC-BUS；AC load passes through transformer
AC/AC is connect with ac bus AC-BUS；It is this that AC load AC-L, DC load DC-L are respectively connected to ac bus AC-
The connection type of BUS DC bus DC-BUS eliminates switch-over unit, reduces system running wastage, improves the utilization of the energy
Rate.
D, DC bus shown in Fig. 3 accesses Traction networks circuit topology figure, and DC bus is by inverter DC/AC and directly
Converter DC/DC accesses Traction networks, and this inverter front end access straight translation circuit of closed loop can inhibit DC bus-bar voltage
The influence to supply conductor voltage is fluctuated, provides stable, high quality alternating current for locomotive load.
E, it is realized between ac bus AC-BUS and DC bus DC-BUS by three electrical level Bidirectional DC-DC Converter Bid-C connections
Power transmission, bidirectional power converter Bid-C by the transimission power between DC bus DC-BUS and ac bus AC-BUS,
Regulating system internal power balance.
Electric railway traction net powered construction in Fig. 1, specific structure include: the generations of electricity by new energy such as photovoltaic, wind-force system
The renewable energy system that system is constituted with regenerating braking energy；The energy-storage system that battery, super capacitor are constituted；All kinds of direct currents are negative
It carries and AC load comes from different backgrounds and possess different abilities load system；Ac bus and DC bus.Photovoltaic generating system PV-DC is straight by isolated form
DC converter DC/DC is connect with DC bus DC-BUS, what straight convertor was exported photovoltaic cell using Closed-loop Control Strategy
The direct current that low-voltage DC is transformed to stable high voltage grade is electrically accessed DC bus；Wind generator system passes through transformer
AC/AC is connect with ac bus AC-BUS；Regenerative braking RE-E is whole by Multiple coil step-down transformer MU-T1 and single-phase electricity die mould
Stream device AC/DC is connect with DC bus DC-BUS, and wherein the decompression of 27.5kV alternating current is 4 tunnel lower voltages by multiwinding transformer
The alternating current of grade accesses after single-phase electricity die mould rectifier AC rectification being electrically accessed DC bus, single-phase voltage for direct current
Type rectifier guarantees the voltage stabilization of output direct current using Closed-loop Control Strategy.Energy-storage system of accumulator BAT by half-bridge every
Release straight convertor DC/DC is connect with DC bus DC-BUS, in combination with full-control type straight convertor double-direction control strategy
Carry out charge and discharge, it is ensured that power supply continuity of the user when having a power failure the short time, and play the role of stabilizing power network fluctuation, it protects
Demonstrate,prove the stabilization of DC bus-bar voltage；Super capacitor energy-storage system SC is female by isolated form full-bridge straight convertor DC/DC and direct current
Line DC-BUS connection, is adjusted when regenerating braking energy is excessive, reduces the impact to DC bus-bar voltage.DC load
DC-L is connect by half-bridge isolated form straight convertor DC/DC with DC bus DC-BUS；AC load AC-L passes through transformer
AC/AC is connect with ac bus AC-BUS；This connection type that AC and DC load is respectively connected to AC and DC bus is saved
Switch-over unit reduces system running wastage, improves the utilization rate of the energy.Ac bus AC-BUS and DC bus DC-BUS
Between by reversible transducer connect, bidirectional power converter between DC bus-bar voltage and ac bus by transmitting function
Rate, regulating system internal power balance.
The electric railway traction net powered construction of the utility model be by realizing control as follows, when Traction networks TC without
When regenerative braking RE-E, from photovoltaic generating system PV-DC and wind generator system WT-AC with maximum power to Traction networks TC and friendship
AC-L, direct current DC-L load output power, battery adjust DC bus DC-BUS voltage, super capacitor SC by charge/discharge
In monitoring AC and DC bus state (by detecting AC and DC busbar voltage, the state that can be devoted oneself to work at any time).Wherein,
Ac bus AC-BUS and DC bus DC-BUS voltage are above voltage rating constantly, and battery BAT charging absorbs power, hand over
Bus is flowed to DC bus output power；When ac bus and DC bus-bar voltage are below voltage rating, electric power storage tank discharge is defeated
Power out, DC bus is to ac bus transimission power；Ac bus voltage is higher than voltage rating and DC bus is lower than specified
When voltage, electric power storage tank discharge output power, ac bus is to DC bus transimission power；Ac bus voltage is lower than voltage rating
And DC bus, when being higher than voltage rating, battery charging absorbs power, and DC bus is to ac bus transimission power.There is regeneration
When braking, photovoltaic generating system and wind generator system stop to Traction networks and AC and DC load output power, and super capacitor fills
Electric absorption power, super capacitor discharges output power after regenerative braking, and battery is in monitoring AC and DC bus state.
The utility model proposes a kind of electric railway traction net powered construction and its control method contain exchange simultaneously
Bus and DC bus, railway 27.5kV Traction networks, railway 10kV through track power supply while, moreover it is possible to independently meet it is all kinds of can
Renewable energy generating system, energy-storage system and polynary load access and realize railway traction net regenerating braking energy it is abundant
It utilizes, reaches the interconnecting of multiple kinds of energy source, friendly interactional purpose.The system has high controllability, flexibility and can
By property, the power quality of railway power supply-distribution system, economy and operational efficiency can be improved.
Claims (2)
1. a kind of electric railway traction net powered construction, including Traction networks TC and the ac bus drawn from traction substation
AC-BUS and DC bus DC-BUS, it is characterised in that: energy-storage system of accumulator BAT and super capacitor energy-storage system SC and light
Photovoltaic generating system PV-DC is connect by straight convertor DC/DC with DC bus, and regenerating braking energy RE-E is dropped by Multiple coil
Pressure transformer MU-T is connect with rectifier AC/DC with DC bus, and Traction networks TC passes through and inverter DC/AC and straight convertor
DC/DC is connect with DC bus, and DC load DC-L is connect by straight convertor DC/DC with DC bus DC-BUS, wind-force
Electricity generation system WT-AC and AC load AC-L is connect by transformer AC/AC with ac bus.
2. a kind of electric railway traction net powered construction according to claim 1, it is characterised in that: the ac bus
It is connected between AC-BUS and DC bus DC-BUS by reversible transducer Bid-C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920120438.1U CN209505511U (en) | 2019-01-23 | 2019-01-23 | A kind of electric railway traction net powered construction |
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| CN201920120438.1U CN209505511U (en) | 2019-01-23 | 2019-01-23 | A kind of electric railway traction net powered construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572491A (en) * | 2019-01-23 | 2019-04-05 | 西南交通大学 | A kind of electric railway traction net powered construction and its control method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572491A (en) * | 2019-01-23 | 2019-04-05 | 西南交通大学 | A kind of electric railway traction net powered construction and its control method |
| CN109572491B (en) * | 2019-01-23 | 2023-11-24 | 西南交通大学 | Electrified railway traction network power supply structure and control method thereof |
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