CN207304017U - Railway traction power supply system based on energy accumulation device for fly wheel - Google Patents
Railway traction power supply system based on energy accumulation device for fly wheel Download PDFInfo
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- CN207304017U CN207304017U CN201721360061.4U CN201721360061U CN207304017U CN 207304017 U CN207304017 U CN 207304017U CN 201721360061 U CN201721360061 U CN 201721360061U CN 207304017 U CN207304017 U CN 207304017U
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- fly wheel
- accumulation device
- energy accumulation
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Abstract
It the utility model is related to a kind of railway traction power supply system based on energy accumulation device for fly wheel.The system includes railway distribution room, energy accumulation device for fly wheel, current transformer, the step-down transformer installed respectively in a phases of supply arm with b phases, fuse and breaker are installed in step-down transformer high-pressure side, in whole electric loop, energy accumulation device for fly wheel is connected by current transformer and step-down transformer with power lead a, b, single-phase alternating current on power lead is transformed into direct current electricity output and performs the control strategy of itself by gathering the voltage and current of converter system to energy accumulation device for fly wheel, energy accumulation device for fly wheel by step-down transformer and converter system.The utility model can realize complete three-phase voltage balance；It can realize the recycling and reuse to train regenerating braking energy；The investment of passing phase insulator device can be reduced；Operation of Electric Systems can be made more to stablize, improve, improve power quality.
Description
Technical field
Railway traction power supply system is the utility model is related to, is specifically that a kind of rail traction based on energy accumulation device for fly wheel supplies
Electric system.
Background technology
Electric railway was quickly grown in recent years, single-phase, high-power, nonlinear operation characteristic and companion due to train
With the lifting of railway transporting amount and the increase for density of dispatching a car, alternate energy imbalance is particularly evident, is born as typical impact
Lotus causes serious influence to power grid power quality.
Since the alternate imbalance of tractive transformer can inject negative-sequence current to electric power system, the generation of negative-sequence current is to whole
Power supply-distribution system causes loss.Negative-sequence current can cause generator output to decline, produce extraneous vibration, cause stator each several part
Uneven heating and rotor surface fever；Motor running efficiency can be reduced, makes motor overheating；It can make under transformer utilization factor
Drop, while cause supplementary transformer energy loss and iron core to add fever；Transmission line of electricity energy loss can be caused, reduces power grid
Conveying capacity；The malfunction of many relay protections can be caused, causes protective relaying device to use when serious.Modern locomotive is adopted mostly
With orthogonal type of drive is handed over, power factor is improved, reduces low-order harmonic pollution, but still can inject high order to trailer system
Harmonic wave, higher hamonic wave is transmitted in power grid easily causes resonance, produces high pressure, jeopardizes line security operation.
Have currently in negative phase-sequence existing for railway power system and the main settling mode of harmonic problem：Using high voltage,
The power supply power supply of large capacity；Using three-phase-biphase equilibrium transformer；Compensated using unbalancing device；Using rotation phase sequence
Mode of connection；Using cophase supply technology.Preceding four kinds of modes fail inherently to solve the problems, such as, and cophase supply technology also reaches
Less than energy saving purpose.
Utility model content
Tractive transformer phase voltage balance and harmonic pollution problems cannot be inherently realized in order to solve the prior art, this
Utility model provides a kind of railway traction power supply system based on energy accumulation device for fly wheel.It is by back-to-back converter system and flies
Take turns energy storage device and adjust the two supply arm balances of voltage, administer negative-sequence current and harmonic pollution；Absorbed and arranged by energy accumulation device for fly wheel
Regeneration energy when car is braked, achievees the purpose that energy saving.
The utility model solves the technical solution that its technical problem uses：
A kind of railway traction power supply system based on energy accumulation device for fly wheel, including railway distribution room, further include flywheel energy storage
Device, current transformer, the step-down transformer installed respectively in a phases of supply arm with b phases, are provided with molten in step-down transformer high-pressure side
Disconnected device and breaker, in whole electric loop, energy accumulation device for fly wheel passes through current transformer and step-down transformer and power lead a, b
It is connected, the single-phase alternating current on power lead is transformed into direct current electricity output and is stored up to flywheel by step-down transformer and converter system
Energy device, energy accumulation device for fly wheel perform the control strategy of itself by gathering the voltage and current of converter system.
Further, the converter system is connected to two supply arms, converter system by two step-down transformers
Two voltage source converters including back to back structure, 1 shared DC capacitor, fill in DC capacitor side parallel connection flywheel energy storage
Put, DC capacitor provides stable DC voltage to two current transformers, and energy accumulation device for fly wheel is used for storing and discharging train regenerative braking
The energy of generation, and by the adjusting of itself discharge and recharge progress active power, ensure two supply arm balances of voltage；Two current transformers
Two secondary side supply arms of tractive transformer are connected to by single phase step-down transformer；Two supply arm rated voltages are 27.5
kV；Two current transformers are controllable to controlled current source, can carry out harmonics restraint and reactive-load compensation, therefore the device can carry out at a high speed
The negative phase-sequence and harmonic compensation of railway.
Further, the electric loop of the energy accumulation device for fly wheel is divided into DC side, IGBT sides, exchange side, specifically
's：
DC side is provided with fastp-acting fuse, D.C. contactor, voltage transformer, current transformer, fastp-acting fuse
Protect the break-make of major loop short trouble, D.C. contactor control energy accumulation device for fly wheel and external busbar, current transformer, voltage
Mutual inductor gathers DC side electric current, magnitude of voltage in real time, judges DC side overcurrent, overvoltage, under-voltage fault by chip, and perform corresponding
Protection act；
IGBT realizes side the transmission of energy, when overtemperature, overvoltage, damage occur for IGBT module when failure, as built in IGBT
Sensor transmits a signal to control chip, trigger protection action；
Surveyed in exchange and A.C. contactor is set, the break-make of control fly-wheel motor and flywheel driving cabinet, in flywheel energy storage unit
The photoelectric encoder put, temperature sensor, pressure sensor by the status signal transmission that flywheel is run to control chip, by chip
Judge the failure of flywheel, and perform protection act.
Using the utility model of above-mentioned technical proposal, compared with prior art, beneficial effect is：
It can realize complete three-phase voltage balance, active power regulation；It can realize to train regenerating braking energy
Recycle；The investment of passing phase insulator device can be reduced, so as to improve locomotive operation efficiency；Whole system can make electric power
System operation is more stablized, and improves system power quality；The utility model principle can also be extended to General Electric Network and micro-capacitance sensor.
By energy accumulation device for fly wheel two supply arms are carried out with discharge and recharge, and converter system provides reactive-load compensation harmony at the same time
Ripple compensation adjusts the two supply arm balances of voltage jointly, improves tractive power supply system power quality.Railway power supply arm is blow-up
Streaming system, two supply arm phases are different, and energy accumulation device for fly wheel is straight-flow system, passes through the intermediate dc ring of energy accumulation device for fly wheel
Save to realize the transmission of energy between a, b phase, different from other compensation devices be energy accumulation device for fly wheel can with storage energy,
Alternate active power compensation can be realized while adjusting three-phase voltage balance；Specific gain effect is embodied in：
（1）Energy accumulation device for fly wheel can carry out the energy that train car regenerative braking produces as container
Train provides active power.In charging process, energy accumulation device for fly wheel can store regenerating braking energy to high-speed rotating
In flywheel, it is suppressed that net the lifting of pressure, in discharge process energy accumulation device for fly wheel can to tractive power supply system active power of output,
Net pressure is compensate for fall while saved electric energy.This process also can guarantee that a, b phase voltage balance by the adjusting of flywheel, avoid bearing
The generation of the sequence electric current at the same time harmonic pollution by back-to-back converter Systematic control.
（2）If converter system breaks down, normal power supply is not influenced, communication protection effect originally remains to keep, but
The equilibrium condition of system can be broken.
Brief description of the drawings
Fig. 1 is the system structure diagram of the utility model embodiment；
Fig. 2 is back-to-back converter system topology figure；
Fig. 3 is energy accumulation device for fly wheel electric loop schematic diagram；
Fig. 4 is flywheel power response curve map.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and embodiments.
Referring to Fig. 1, a kind of railway traction power supply system based on energy accumulation device for fly wheel, including existing railway distribution room,
Increased equipment is needed to have：Energy accumulation device for fly wheel, current transformer, install step-down transformer in a phases of supply arm with b phases respectively,
Step-down transformer high-pressure side is installed by fuse and breaker.Energy accumulation device for fly wheel passes through current transformer and change in whole electric loop
Depressor is connected with power lead a, b, and the system of transformer and current transformer composition converts the single-phase alternating current on power lead
Performed certainly to energy accumulation device for fly wheel, energy accumulation device for fly wheel by gathering the voltage and current of converter system into direct current electricity output
The control strategy of body.
Referring to Fig. 2, two-port transformer is connected to one by back-to-back converter system by the coupling of DC capacitor
Rise, two supply arms are connected to by 2 step-down transformers.System include two voltage source converter of back to back structure, 1 it is shared
DC capacitor, in DC capacitor side parallel connection energy accumulation device for fly wheel, DC capacitor provides stable DC voltage, flywheel to two current transformers
Energy storage device is used for storing and discharging the energy of train regenerative braking generation, and the tune of active power is carried out by itself discharge and recharge
Section, ensures two supply arm balances of voltage.Two current transformers be connected to tractive transformer by single phase step-down transformer 2 are secondary
Side supply arm.Two supply arm rated voltages are 27.5 kV.Two current transformers are controllable to controlled current source, can carry out harmonic wave suppression
System and reactive-load compensation, therefore the device can carry out the negative phase-sequence and harmonic compensation of high-speed railway.
Referring to Fig. 3, energy accumulation device for fly wheel electric loop can be divided into three parts：DC side, IGBT sides, exchange side.
Fastp-acting fuse, D.C. contactor, voltage transformer, current transformer are equipped with DC side, melts FU1, FU2 soon
Major loop short trouble is protected, D.C. contactor can control the break-make of energy accumulation device for fly wheel and external busbar, current transformer
CT1, voltage transformer pt gather DC side electric current, magnitude of voltage in real time, judge DC side overcurrent, overvoltage, under-voltage fault by chip,
And perform corresponding protection act.
The major function of IGBT sides is to realize the transmission of energy, when the failures such as overtemperature, overvoltage, damage occur for IGBT module
When, transmit a signal to control chip, trigger protection action by IGBT built-in sensors.
A.C. contactor is equipped with exchange survey, fly-wheel motor can be controlled to drive the break-make of cabinet, flywheel energy storage with flywheel
Photoelectric encoder, temperature sensor, pressure sensor built in unit by the status signal transmission that flywheel is run to control chip,
The failure of flywheel is judged by chip, and performs protection act.
In whole system operation, when phase voltage is uneven between two supply arms, adjusted by converter system idle
Compensation and harmonic compensation, active power is compensated by energy accumulation device for fly wheel.Specific control mode is as follows：
（1）When a phase supply arms have train braking, when there is no the train to pass through on b phase supply arms, at this time a phases can be caused to power
Arm net presses lifting and has regenerative current to flow through, itself enters after flywheel energy storage system collects system network pressure and curent change at this time
Charged state, ensures that a, b phase net pressing weighing apparatus, while the energy stores of train regenerative braking are got up.Converter system carries at this time
For reactive-load compensation and harmonic compensation.
（2）When a phase supply arms have launch train, when there is no the train to pass through on b phase supply arms, at this time a phases can be caused to power
Arm net drops simultaneously increase with tractive transformer output current, and flywheel energy storage system collects system network pressure and electric current at this time
Itself enters discharge condition after change, and the compensation of active power is provided for launch train, and converter system provides in the process
Reactive-load compensation and harmonic compensation.
（3）When having launch train at the same time on a, b phase supply arm or passing through, a, b phase can be caused to net pressure at this time while drawn
Low, flywheel energy storage system is by comparing the current value of magnitude of voltage and transformer outlet side on two supply arms, to magnitude of voltage quilt
The compensation that a serious phase carries out active power is dragged down, while converter system provides harmonic compensation and reactive-load compensation.
（4）When having train braking at the same time on a, b phase supply arm, two supply arm voltages can be caused to raise simultaneously simultaneously at this time
There is regenerative current to flow through, flywheel energy storage system is by comparing the voltage on two supply arms, first from the elevated phase of magnitude of voltage
Electric energy is absorbed, when two supply arm phase voltages balance, flywheel absorbs electric energy from two supply arms at the same time, suppresses Traction networks pressure
Lifting, ensure to have achieveed the purpose that to recycle electric energy while two supply arm balances of voltage, lean on converter system during this
Reactive-load compensation and harmonic compensation are provided.
（5）When having launch train on a phase supply arms, having train braking on b phase supply arms, two supply arms are caused at this time
Mutually unbalanced degree is most serious, at this time can be directly by the regeneration energy transfer of b phase train brakings by converter system
Launch train is supplied to a phases, starts energy since braking energy is less than, is provided from energy accumulation device for fly wheel to a phases during this active
Power, ensures two supply arm phase voltages balance, provides reactive-load compensation and harmonic compensation by current transformer during this.
（6）When having train braking in a supply arm at the same time and starting, the energy priority quilt of train regenerative braking at this time
Start train to be absorbed, start energy since braking energy is less than, also need flywheel energy storage system to be provided with the supply arm at this time
Work(power, provides reactive-load compensation and harmonic compensation by converter system in the process.
Referring to Fig. 4, its result tested for a ups system oscillograph being connected with flywheel.The rear flywheel of 1ms starts
Power supply, and reach full power after 5ms, the ability with quick response discharge and recharge in millisecond.
Energy accumulation device for fly wheel can reach total power output with moment quick response in 5ms, additionally it is possible to safe discharge and recharge, knot
Structure is compact, simple to install, applicable a variety of environment.These advantages make it particularly suitable for being used in power density it is big,
The occasion that fast response time, service life are long, energy density is high, becomes electric system processing peakload and transient fluctuation most
Good selection.
The above descriptions are merely preferred embodiments of the present invention, not the utility model is done any type of
Limitation, any content without departing from technical solutions of the utility model, according to the technical essence of the utility model to above example
Any simple modification, equivalent change and modification done, belongs to the scope of technical solutions of the utility model.
Claims (3)
1. a kind of railway traction power supply system based on energy accumulation device for fly wheel, including railway distribution room, it is characterised in that：Further include
Energy accumulation device for fly wheel, current transformer, the step-down transformer installed respectively in a phases of supply arm with b phases, in step-down transformer high-pressure side
Fuse and breaker are installed, in whole electric loop, energy accumulation device for fly wheel passes through current transformer and step-down transformer and feedback
The goddess of lightning's line a, b are connected, and it is defeated that the single-phase alternating current on power lead is transformed into direct current by step-down transformer and converter system
Go out and perform the control plan of itself by gathering the voltage and current of converter system to energy accumulation device for fly wheel, energy accumulation device for fly wheel
Slightly.
2. the railway traction power supply system according to claim 1 based on energy accumulation device for fly wheel, it is characterised in that：Described
Converter system is connected to two supply arms by two step-down transformers, and converter system includes two voltage sources of back to back structure
Current transformer, 1 shared DC capacitor, in DC capacitor side parallel connection energy accumulation device for fly wheel, DC capacitor is provided to two current transformers
Stable DC voltage, energy accumulation device for fly wheel are used for storing and discharging the energy of train regenerative braking generation, and pass through itself charge and discharge
Electricity carries out the adjusting of active power, ensures two supply arm balances of voltage；Converter system provides reactive-load compensation and harmonic compensation；
Two current transformers are connected to two secondary side supply arms of tractive transformer by output reactance and single phase step-down transformer；Two power supplies
Arm rated voltage is 27.5 kV.
3. the railway traction power supply system according to claim 1 or 2 based on energy accumulation device for fly wheel, it is characterised in that：Institute
The electric loop for the energy accumulation device for fly wheel stated is divided into DC side, IGBT sides, exchange side, specifically：
DC side is provided with fastp-acting fuse, D.C. contactor, voltage transformer, current transformer, fastp-acting fuse protection
The break-make of major loop short trouble, D.C. contactor control energy accumulation device for fly wheel and external busbar, current transformer, mutual induction of voltage
Device gathers DC side electric current, magnitude of voltage in real time, judges DC side overcurrent, overvoltage, under-voltage fault by chip, and perform corresponding protection
Action；
IGBT realizes side the transmission of energy, when overtemperature, overvoltage, damage failure occur for IGBT module, by IGBT built-in sensors
Transmit a signal to control chip, trigger protection action；
Surveyed in exchange and A.C. contactor is set, the break-make of control fly-wheel motor and flywheel driving cabinet, built in flywheel energy storage unit
Photoelectric encoder, temperature sensor, pressure sensor to control chip, are judged the status signal transmission that flywheel is run by chip
The failure of flywheel, and perform protection act.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721360061.4U CN207304017U (en) | 2017-10-21 | 2017-10-21 | Railway traction power supply system based on energy accumulation device for fly wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721360061.4U CN207304017U (en) | 2017-10-21 | 2017-10-21 | Railway traction power supply system based on energy accumulation device for fly wheel |
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| CN207304017U true CN207304017U (en) | 2018-05-01 |
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| CN201721360061.4U Withdrawn - After Issue CN207304017U (en) | 2017-10-21 | 2017-10-21 | Railway traction power supply system based on energy accumulation device for fly wheel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492902A (en) * | 2017-10-21 | 2017-12-19 | 盾石磁能科技有限责任公司 | The method of railway traction power supply system and its improvement quality of power supply based on energy accumulation device for fly wheel |
| CN109484199A (en) * | 2018-12-21 | 2019-03-19 | 西南交通大学 | A kind of powered construction and its method using electric railway regenerating braking energy |
| CN115579919A (en) * | 2022-11-22 | 2023-01-06 | 武汉新能源接入装备与技术研究院有限公司 | Flywheel energy storage system and method suitable for rail transit |
-
2017
- 2017-10-21 CN CN201721360061.4U patent/CN207304017U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107492902A (en) * | 2017-10-21 | 2017-12-19 | 盾石磁能科技有限责任公司 | The method of railway traction power supply system and its improvement quality of power supply based on energy accumulation device for fly wheel |
| CN107492902B (en) * | 2017-10-21 | 2023-06-13 | 盾石磁能科技有限责任公司 | Railway traction power supply system based on flywheel energy storage device and method for improving power quality of railway traction power supply system |
| CN109484199A (en) * | 2018-12-21 | 2019-03-19 | 西南交通大学 | A kind of powered construction and its method using electric railway regenerating braking energy |
| CN109484199B (en) * | 2018-12-21 | 2023-05-26 | 西南交通大学 | Power supply structure and method for regenerating braking energy by utilizing electrified railway |
| CN115579919A (en) * | 2022-11-22 | 2023-01-06 | 武汉新能源接入装备与技术研究院有限公司 | Flywheel energy storage system and method suitable for rail transit |
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Address after: 050800 No.12, jiaojiaopu street, North District, high tech Development Zone, Zhengding County, Shijiazhuang City, Hebei Province Patentee after: DUNSHI MAGNETIC ENERGY TECHNOLOGY Co.,Ltd. Address before: 063021 No. 35, Daqing Road, Tangshan City hi tech Development Zone, Hebei Patentee before: DUNSHI MAGNETIC ENERGY TECHNOLOGY Co.,Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180501 Effective date of abandoning: 20230613 |
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Granted publication date: 20180501 Effective date of abandoning: 20230613 |
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