CN107910937A - A kind of control device and method based on railway test wire traction substation regenerative braking ground absorption device - Google Patents
A kind of control device and method based on railway test wire traction substation regenerative braking ground absorption device Download PDFInfo
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- CN107910937A CN107910937A CN201710950016.2A CN201710950016A CN107910937A CN 107910937 A CN107910937 A CN 107910937A CN 201710950016 A CN201710950016 A CN 201710950016A CN 107910937 A CN107910937 A CN 107910937A
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- cabinet
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- regenerative braking
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
A kind of railway test wire traction substation regenerative braking ground absorption device, including sequentially connected resistor box, copped wave cabinet, isolating switch cabinet, energy storage direct-current switch cabinet, converter cabinet and super capacitor energy-storage cabinet are absorbed, further includes the DC feeder cabinet being connected with absorbing the dc bus of isolating switch cabinet and energy storage direct-current switch cabinet.The present invention can stable DC busbar voltage, while reduce braking resistor consumption energy and fever, produce significantly it is energy-saving and improve system stability effect.
Description
Technical field
The present invention relates to the control of railway test wire traction substation regenerative braking ground absorption device, more specifically,
It is related to the DC converter of the backward AC network feedback of the regenerating braking energy inversion of the direct current contact net of track, at the same time
Have idle, harmonic compensation function concurrently.
Background technology
At present, regenerating braking energy is a four quadrant convertor in fact using the unit of device, when direct current contact net power grid
When too low, cell operation flows to DC grid, stable DC network voltage in first quartile energy from AC network.When train system
When dynamic vertical compression is excessive, cell operation flows to AC network in fourth quadrant energy from DC grid, has saved the energy.
It is of the invention compared with two traditional electrical level Bidirectional DC-DC Converters, which has the following advantages：It is simple in structure, input
Output common ground, it is easily controllable；Switch tube voltage stress is only the half of high voltage end input voltage；Inductance can greatly reduce,
So as to improve the dynamic response of converter.Regenerating braking energy also has reactive-load compensation and filter function using device, both may be used
It is idle to receive master control reactive command compensation exchange side, it is low and idle to solve the power factor (PF) caused by line charging at night
Send problem；Exchange side harmonic wave caused by rectification change can also be filtered out.Regenerating braking energy is adopted using the filter reactance of device
With high-power high-frequency soft magnetism reactance, loss is small, and filtered energy is strong, and overall efficiency can reach 98%.Regenerating braking energy utilizes
Device unit uses modularized design, and each cell power size is the same, can exchange, and has both been facilitated using this design method standby
Product stock also allows for rapid-maintenance trouble unit.Regenerating braking energy has cell failure auto by pass work(using device unit
Can, when unit breaks down, trouble unit auto by pass, remaining normal cell still can work normally, and complete machine power is only
It is to scale down.Trouble unit can be replaced at a convenient time, easy to safeguard, improve the security of complete machine.Regenerative braking electricity
It can be communicated using the main control part of device by optical fiber and each power cell, the bridge side electric current for directly gathering each unit carries out
Feedback control.Converting Unit is intended using three level translation technologies, and using the forth generation IGBT of 1200V, switching frequency plan is accomplished
12.8KHz so that output switching harmonics are limited within 50A peak values.The core of regenerative braking utilization of power device is more than one group
Electrical level inverter, by the backward AC network feedback of the regenerating braking energy inversion of track direct current contact net, avoids regeneration system
Waste of the energy on absorption resistance, has saved energy, reduces the voltage fluctuation of DC grid, improves the power supply of DC grid
Quality, in addition can also compensate for idle and 5,7,11,13 subharmonic of AC network, improve the power supply matter of AC network
Amount.
The content of the invention
The technical scheme is that：
A kind of railway test wire traction substation regenerative braking ground absorption device, it is characterised in that：Including being sequentially connected
Resistor box, copped wave cabinet, absorb isolating switch cabinet, energy storage direct-current switch cabinet, converter cabinet and super capacitor energy-storage cabinet, further include
The DC feeder cabinet that dc bus with absorbing isolating switch cabinet and energy storage direct-current switch cabinet is connected；
Further, the copped wave cabinet includes two-way DC converter circuit, and the circuit is：Input terminal is Traction networks electricity
Press Uin, capacitor C, both are in parallel, the collector of input anode connecting valve pipe Q1, the emitter connecting valve of switching tube Q1
The collector of pipe Q2, the cathode of the emitter connection diode D1 of switching tube Q2, the anode connecting valve pipe D2's of diode D1
Cathode, the anode of the anode connection input terminal of diode D2, striding capacitance CflyCathode be connected to switching tube Q1 emitter,
Anode is connected to the anode of diode D1, and mono- ends of inductance L are connected to the emitter of switching tube Q2, the other end is sequentially connected in series resistance R, capacitance
SC, forms circuit and is connected to input cathode；
Further, when switching tube Q1 is turned on, Q2 is turned off, UAB=Uin/ 2, CflyCharging；When switching tube Q1 and Q2 turn off,
UAB=0, CflyIt is failure to actuate；When switching tube Q1 is turned off, Q2 is turned on, UAB=Uin/ 2, CflyElectric discharge；Switching tube Q1 and Q2 are turned on, inductance
UAB=Uin, CflyIt is failure to actuate, UinRepresent supply conductor voltage；
Controlling party used by a kind of railway test wire traction substation regenerative braking ground absorption device as described above
Method, it is characterised in that：In super capacitor charging process, work as UCfly＜ UinWhen/2, the increase of Q1 duty cycles, Q2 should be made in control
Duty cycle reduces to lift striding capacitance voltage；And UCfly＞ UinWhen/2, the increase of Q2 duty cycles, Q1 duty cycles should be made in control
Reduce to reduce striding capacitance voltage；Wherein UinRepresent supply conductor voltage.
Further, the method is specially：
By the given value of current value of the inductance LSubtract the actually detected inductor current value i arrivedL, the progress PI adjustings of its difference
Afterwards, the output after PI is adjusted plus the striding capacitance voltage is output it, both and is controlled again with triangle wave
Make opening and turning off for the switching tube Q1；By the inductive current set-pointSubtract the actually detected inductor current value i arrivedL,
After its difference carries out PI adjustings, the output for subtracting the striding capacitance voltage after PI is adjusted is output it, both differences are again
Opening and turning off for the switching tube Q2 is controlled with triangle wave.
The energy flow of this two-way DC converter control super capacitor of the present invention, its output capacity is using fixed switching
The mode that module is combined with adjustable module.Super capacitor efficiency for charge-discharge and input voltage grade are effectively improved, is realized
Control to direct current net pressure, striding capacitance voltage and super capacitor charging and discharging currents.Therefore the present invention being capable of stable DC
Busbar voltage, while energy and the fever of braking resistor consumption are reduced, produce significantly energy-saving and improvement system and stablize
The effect of property.
Brief description of the drawings
Fig. 1 railway test wire traction substation regenerative braking ground absorption device fundamental diagrams
Fig. 2 is two-way DC converter main circuit diagram
Fig. 3 is railway test wire traction substation regenerative braking ground absorption device
Fig. 4 is railway test wire traction substation regenerative braking ground absorption device secondary connection diagram
Embodiment
The schematic diagram of railway test wire traction substation regenerative braking ground absorption device is as shown in Figure 1, main include electricity
Cabinet 1-4, copped wave cabinet 1-2 are hindered, isolating switch cabinet, energy storage direct-current switch cabinet, converter cabinet, super capacitor energy-storage cabinet is absorbed, also wraps
Include DC feeder cabinet.
When train braking slows down, contact net DC bus-bar voltage lifting, device as absorb branch resistor box 1-4 and
Super capacitor energy-storage cabinet as energy storage branch acts at the same time, and the converter cabinet of wherein energy storage branch is operated in BUCK decompression moulds
Formula, by the energy stores on dc bus into super capacitor energy-storage cabinet, slows down the uplift rate of DC bus-bar voltage, inhales at the same time
The power that the copped wave cabinet control on revenue and expenditure road absorbs, makes contact net voltage be limited within 1780V (thresholding can be set)；When train opens
During dynamic acceleration, contact net DC bus-bar voltage drags down, and at this time, the energy storage branch converter cabinet of device is operated in BOOST boosting moulds
Formula, by the energy feedback of super capacitor into contact net, limits the decline of DC bus-bar voltage, and absorbs branch and then disconnect,
Do not produce absorption.Therefore the present apparatus can stable DC busbar voltage, while reduce braking resistor consumption energy and hair
Heat, produces effect that is significantly energy-saving and improving system stability.
Fig. 2 is two-way DC converter main circuit diagram of the present invention, and copped wave cabinet 1-2 uses this topological structure in Fig. 1, in Fig. 1
In, UinRepresent the DC bus-bar voltage under DC1500/DC750 standards, when：
1. switching tube Q1 is turned on, Q2 shut-offs, UAB=Uin/ 2, CflyCharging；
2. switching tube Q1 and Q2 are turned off, UAB=0, CflyIt is failure to actuate；
3. switching tube Q1 is turned off, Q2 conductings, UAB=Uin/ 2, CflyElectric discharge；
4. close pipe Q1 and Q2 conducting, inductance UAB=Uin, CflyIt is failure to actuate.
In Fig. 2, CflyFor striding capacitance, operating voltage UCfly=Uin/2.The super capacitor terminal voltage of output is by 0, Uin/ 2 Hes
UinThree kinds of level fittings form, so that the AC compounent of output voltage is more much smaller than two level, improve the dynamic of converter
Energy and efficiency, wherein, UinRepresent supply conductor voltage, that is, DC bus-bar voltage.Voltage UinWith capacitor C, both are in parallel, input terminal
The collector of cathode connecting valve pipe Q1, the collector of the emitter connecting valve pipe Q2 of switching tube Q1, the transmitting of switching tube Q2
The cathode of pole connection diode D1, the cathode of the anode connecting valve pipe D2 of diode D1, the anode connection input of diode D2
The anode at end, striding capacitance CflyCathode be connected to the emitter of switching tube Q1, anode is connected to the anode of diode D1, inductance L
One end is connected to the emitter of switching tube Q2, the other end is sequentially connected in series resistance R, capacitance SC, forms circuit and is connected to input cathode.
In super capacitor charging process, striding capacitance charges when switching tube Q1 is turned on, and striding capacitance discharges when switching tube Q2 is turned on.Institute
To work as UCfly＜ UinWhen/2, the increase of Q1 duty cycles, Q2 duty cycles should be made to reduce to lift striding capacitance voltage in control；And
UCfly＞ UinWhen/2, the increase of Q2 duty cycles, Q1 duty cycles should be made to reduce to reduce striding capacitance voltage, wherein U in controlinTable
Show supply conductor voltage i.e. DC bus-bar voltage.
Resistor box adjusts striding capacitance voltage using following methods：When the voltage of striding capacitance is less than 700V, switch
Pipe Q1 conductings, Q2 shut-offs, set flag states flag=0 at this time；When striding capacitance voltage is more than or equal to 750V, and lead
When drawing net voltage and being more than 1770V, switching tube Q1 conductings, Q2 conductings, if flag states flag1=1 at this time, and work as supply conductor voltage
During less than 1750V, switching tube Q1, Q2 shut-off, if flag states flag1=0 at this time, and as flag1=0 and when Traction networks electricity
When being pressed between 1750V and 1770V, switching tube Q1 shut-offs, Q2 shut-offs, and as flag1=1 and when supply conductor voltage exists
When between 1750V and 1770V, switching tube Q1 conductings, Q2 conductings, set flag=1 at this time；Work as flag=0, and striding capacitance electricity
When pressure is more than 700V and is less than 750V, switching tube Q1 conductings, switching tube Q2 shut-offs；When flag=1 and striding capacitance voltage are more than
700V and when being less than 750V, and when supply conductor voltage is more than 1770V, switching tube Q1 conductings, Q2 conductings, set flag1 at this time
=1, and when supply conductor voltage is less than 1750V, switching tube Q1 shut-offs, Q2 shut-offs, set flag1=0, and work as flag1 at this time
=0 and supply conductor voltage be more than 1750V and when being less than 1770V, switching tube Q1 shut-offs, Q2 are turned off, and are worked as flag1=1 and lead
When drawing net voltage more than 1750V and being less than 1770V, switching tube Q1 conductings, Q2 conductings.
The control method of resistor box is that the inductive current set-point in Fig. 2 and inductor current feedback value are made the difference by PI tune
Section, then the value plus striding capacitance voltage after PI is adjusted, PWM ripples are relatively obtained with triangular carrier and carry out controlling switch pipe Q1
Open and turn off；Inductive current set-point in Fig. 2 is made the difference with inductor current feedback value and is adjusted by PI, is then subtracted winged
Across value of the capacitance voltage after PI is adjusted, PWM ripples are relatively obtained with triangular carrier and carry out opening and turning off for controlling switch pipe Q2.
With reference to Fig. 1 and 4, the start-up course of device is described in detail
Confirm that electrical connection is errorless, user can set whether resistor box 1,2,3,4 enables on touch screen interface, then cut
KM1, KM2, KM3, KM4 on ripple cabinet 1-2 have corresponding action, when the start button for pressing the absorptive unit in Fig. 3 cabinet doors,
Equipment first determines whether the electric isolating switch QS11 absorbed on isolating switch cabinet closes, if closing, on DC feeder cabinet
Breaker closing judge whether to close a floodgate, then absorb isolating switch cabinet on direct current it is soft open contactor KM12 close a floodgate send preliminary filling
Electricity instruction (user can set the rated voltage of equipment on interface), KM12 separating brakes after completion is pre-charged, KM11, which closes a floodgate, to be sentenced
Whether disconnected KM11 closes a floodgate and then sends work order.At this moment DC bus-bar voltage can be observed on interface, absorbs electric current, energy storage
The change of electric current.During the stop button of the absorptive unit on by lower cabinet door, absorptive unit contactor KM1, KM2, KM3, KM4,
Main contactor KM11, wind turbine contactor Km1, electronic leave close QS11 separating brakes successively.Energy-storage units on by lower cabinet door open
Dynamic button, equipment first determines whether electric isolating switch QS21 closes, if closing, the dc circuit breaker on DC feeder cabinet
Close a floodgate and judge whether to close a floodgate, then direct current it is soft open contactor KM22 and close a floodgate send precharge command (user can set on interface
Install standby rated voltage), KM22 separating brakes after completion is pre-charged, KM21 locks simultaneously judge whether KM21 closes a floodgate and then send work
Instruct.At this moment DC bus-bar voltage can be observed on interface, absorbs the change of electric current, energy storage electric current.On by lower cabinet door
Energy-storage units stop button when, main contactor KM21, wind turbine contactor Km2, electric isolating switch QS21 separating brake successively.
Railway test wire traction substation regenerative braking ground absorption device can be realized：Effectively suppress electric locomotive to start
Voltage Drop, skidding rush of current, effectively suppress voltage fluctuation and flicker, maintenance voltage stabilization, ensure systematic electricity
Reliability operation, reduces the power consumption of Rail Transit System skidding, improves efficiency of energy utilization.
The present invention is described in detail above, only as described above, is only presently preferred embodiments of the present invention,
When the scope implemented of the present invention cannot be limited.I.e. all equivalent changes and modifications made according to the present patent application scope etc., all should be still
Belong in the patent covering scope of the present invention.
Claims (5)
- A kind of 1. railway test wire traction substation regenerative braking ground absorption device, it is characterised in that：Including sequentially connected Resistor box, copped wave cabinet, absorb isolating switch cabinet, energy storage direct-current switch cabinet, converter cabinet and super capacitor energy-storage cabinet, further include with Absorb the DC feeder cabinet that isolating switch cabinet is connected with the dc bus of energy storage direct-current switch cabinet.
- 2. railway test wire traction substation regenerative braking ground absorption device as claimed in claim 1, it is characterised in that institute Stating copped wave cabinet includes two-way DC converter circuit, and the circuit is：Input terminal is supply conductor voltage Uin, capacitor C, both are simultaneously Connection, the collector of input anode connecting valve pipe Q1, the collector of the emitter connecting valve pipe Q2 of switching tube Q1, switching tube The cathode of the emitter connection diode D1 of Q2, the cathode of the anode connecting valve pipe D2 of diode D1, the anode of diode D2 Connect the anode of input terminal, striding capacitance CflyCathode be connected to the emitter of switching tube Q1, anode is connected to the sun of diode D1 Pole, mono- ends of inductance L are connected to the emitter of switching tube Q2, the other end is sequentially connected in series resistance R, capacitance SC, and composition circuit is connected to defeated Enter to hold anode.
- 3. railway test wire traction substation regenerative braking ground absorption device as claimed in claim 2, it is characterised in that：When Switching tube Q1 is turned on, Q2 shut-offs, UAB=Uin/ 2, CflyCharging；As switching tube Q1 and Q2 shut-off, UAB=0, CflyIt is failure to actuate；When opening Close pipe Q1 shut-offs, Q2 conductings, UAB=Uin/ 2, CflyElectric discharge；Switching tube Q1 and Q2 are turned on, inductance UAB=Uin, CflyIt is failure to actuate, Uin Represent supply conductor voltage.
- 4. controlling party used by railway test wire traction substation regenerative braking ground absorption device as claimed in claim 2 Method, it is characterised in that：In super capacitor charging process, work as UCfly＜ UinWhen/2, the increase of Q1 duty cycles, Q2 should be made in control Duty cycle reduces to lift striding capacitance voltage；And work as UCfly＞ UinWhen/2, the increase of Q2 duty cycles, Q1 duties should be made in control Striding capacitance voltage, wherein U are reduced than reducinginRepresent supply conductor voltage.
- 5. control method as claimed in claim 4, it is characterised in that：By the given value of current value of the inductance LSubtract actual inspection The inductor current value i measuredL, after its difference carries out PI adjustings, output it and adjusted plus the striding capacitance voltage by PI Output afterwards, both and controls opening and turning off for the switching tube Q1 with triangle wave again；By the inductive current Set-pointSubtract the actually detected inductor current value i arrivedL, after its difference carries out PI adjustings, output it and subtract described fly across electricity Hold output of the voltage after PI is adjusted, both differences control opening and closing for the switching tube Q2 with triangle wave again It is disconnected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710950016.2A CN107910937A (en) | 2017-10-12 | 2017-10-12 | A kind of control device and method based on railway test wire traction substation regenerative braking ground absorption device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710950016.2A CN107910937A (en) | 2017-10-12 | 2017-10-12 | A kind of control device and method based on railway test wire traction substation regenerative braking ground absorption device |
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Cited By (5)
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| CN109951092A (en) * | 2019-04-02 | 2019-06-28 | 燕山大学 | Six switch five-power level converters of one kind and its control method |
| CN111600369A (en) * | 2019-02-21 | 2020-08-28 | 株洲中车时代电气股份有限公司 | Automatic charging and discharging device and method for high-power energy storage power supply |
| CN111596150A (en) * | 2020-04-29 | 2020-08-28 | 新风光电子科技股份有限公司 | Full-load experimental system of subway capacitor energy storage type braking energy absorption device |
| CN111869072A (en) * | 2018-08-01 | 2020-10-30 | 华为技术有限公司 | Control circuit of voltage conversion circuit |
| CN113060007A (en) * | 2021-04-21 | 2021-07-02 | 重庆中车长客轨道车辆有限公司 | Energy absorption system for a rail vehicle |
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| CN109951092A (en) * | 2019-04-02 | 2019-06-28 | 燕山大学 | Six switch five-power level converters of one kind and its control method |
| CN111596150A (en) * | 2020-04-29 | 2020-08-28 | 新风光电子科技股份有限公司 | Full-load experimental system of subway capacitor energy storage type braking energy absorption device |
| CN113060007A (en) * | 2021-04-21 | 2021-07-02 | 重庆中车长客轨道车辆有限公司 | Energy absorption system for a rail vehicle |
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