CN104802646B - Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor - Google Patents
Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor Download PDFInfo
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Abstract
The invention discloses a method and a system for recovering regenerative brake energy of an energy storage type urban rail based on a supercapacitor. The method comprises the following steps of connecting a direct current traction network of the urban rail through a chopping unit and a supercapacitor unit, wherein the chopping unit comprises two bidirectional chopping module units; according to the connecting type of the two bidirectional chopping module units of the direct current traction network, and the voltages of the direct current network and the supercapacitor, controlling the charging and discharging of the supercapacitor unit. The system comprises the chopping unit, the supercapacitor unit, a chopping control module and a direct current isolation switch unit, wherein the chopping unit comprises the two bidirectional chopping module units which are connected in series or parallel, and each bidirectional chopping module unit comprise one or more than one bidirectional DC/DC (direct current/direct current) chopping module which is connected in parallel. The method and the system have the advantages that the regenerative brake energy of the urban rail can be recovered and fed back, and the method and the system can be applied to the common DC1500V/DC750V direct current traction networks; the universality is strong, the reliability is high, the stability is good, the production cost is low, and the flexibility is high.
Description
Technical field
The present invention relates to the regenerating braking energy recovery technology of municipal rail train, and in particular to a kind of storage based on super capacitor
Can type regenerating braking energy recovery method and system.
Background technology
In recent years, urban rail transit in China development is rapid, important set of the power supply of city railway system as track traffic
Into part, its energy consumption index is the important indicator of metro operation, and the requirement of energy-saving and technology upgrading makes urban track traffic
There is further strong demand for regeneration energy is rationally utilized.In order to promote Construction of Urban Rail Traffic to resource-conserving, ring
The green of border friendly, sustainability direction are developed, and need development track traffic regenerating braking energy secondary energy-saving to utilize system
Research.
It is regenerative braking energy feedback device that at present application at home and abroad is more ripe, will the energy that produces of train braking
Amount is converted to alternating current by inversion, then is fed back to AC network.Regenerative braking energy feedback device presses feedback point voltage not
It is same to be divided into low-pressure type energy back feed device, medium-pressure type energy back feed device, high-pressure type energy back feed device.Wherein low-pressure type energy
Feedback device can realize the feeding braking energy back in certain power bracket, but energy absorption is limited, need to typically install resistance additional and disappear
Consumption device, it is less efficient；Medium-pressure type energy back feed device can realize full power range inside brake energy feedback, but feedback device
There is circulation between commutator, it is less efficient, poor compatibility is protected, power factor is relatively low, is fed back to the current harmonics of electrical network
It is larger；High-pressure type energy back feed device can realize full power range inside brake energy feedback, using multiplex topological structure, throw
Money is higher, and domestic application is less.
Full power range inside brake energy absorption can be realized based on the accumulation energy type energy recycle device of super capacitor, it is super
Electric capacity has cycle-index height, charging rate is fast, power density is high, pollution-free, non-maintaining, efficiency for charge-discharge is high, temperature range
Wide the advantages of, these characteristics, make super capacitor be adaptive to urban rail field, quickly can start for city rail vehicle and provide instantaneous
It is high-power, and the energy of vehicle feedback braking can be effectively absorbed, it is the important research of urban rail regenerative braking energy reclaiming system
Direction.The subway line application at home at present of the regenerative braking energy reclaiming system of municipal rail train, and existing a plurality of subway
Circuit is doing regenerative braking energy reclaiming system planning, and it is that following metro operation is matched somebody with somebody that this also represents regenerating braking energy system
The main trend put.And the accumulation energy type regenerative braking energy reclaiming system based on super capacitor can most meet the train braking time
It is short, the characteristics of braking power is big, it is the important research direction of current urban rail regenerative braking energy reclaiming system.
At present for the accumulation energy type regenerating braking energy based on super capacitor is reclaimed, prior art mainly has with hereafter several
Kind：
Prior art one：Urban rail traffic vehicle braking disclosed in the patent documentation of Publication No. CN 101249802A
Energy-recuperation system, system that employs based on vehicle itself is main body, the energy regenerating closed loop system for departing from electrical network, will be reclaimed
Electrical power storage in super capacitor, when super capacitor array capacity >=compartment electricity capacity, super capacitor array is to compartment
Internal alternating current-direct current electrical equipment is powered；When super capacitor array capacity reaches rated capacity, will be switched to during train braking
Resistive braking pattern.The super capacitor of the technology only absorbs this section car group energy, capacity very little, the efficiency of Brake energy recovery
It is low；Additionally, the technology needs the parts such as super capacitor charging circuit, discharge circuit, DC/AC transducers, transformation voltage regulation unit, and
Extra braking resistor part is needed, the cost of investment of whole device is high, and control is complicated.
Prior art two：The patent documentation of Publication No. CN 101042121A is disclosed to be used to recycle city rail traffic
The flywheel energy storage system of regenerating braking energy.The scheme based on pond and multiple flywheel energy storage subsystems is system that employs, is adopted
It is directly connected to the leader cable of city rail traffic direct current network with parallel way jointly or is used to process regenerative braking with city rail traffic
The chopping voltage-regulating device connection of energy.But at home and abroad it is difficult to using the scheme of flywheel energy storage system at present.
Prior art three：Nanjing Aero-Space University Feng Jingjing master thesis in 2010《Based on super capacitor again
Raw braking energy absorbs technical research》.The technology employs 4 series connection of unsteady flow module high voltage side, super capacitor side independences
The modularity energy storing structure of combination, module Pressure and Control are complicated and effect it is difficult to ensure that；Become flow module each anti-using two IGBT
The two-way chopper circuits of BUCK/BOOST of a diode in parallel, switching frequency are relatively low, and the output quality of power supply is poor, module volume
Greatly.
In above-mentioned several existing schemes to accumulation energy type regenerative braking energy reclaiming system, all have the shortcomings that certain.
One circuit system of prior art is complicated, control system is complicated, cost of investment is high；Prior art two adopts flywheel energy storage system, state
It is inside and outside to be all difficult to；The change flow module Pressure and Control of prior art three are complicated, and the switching frequency of change flow module is relatively low, volume
Greatly.And the change flow module of three of the above prior art can not realize warm connection function, accumulation energy type regenerating braking energy reclaims dress
Put, when have it is arbitrary become flow module and break down when, whole device all incite somebody to action
It is disconnected to realize defencive function, the failure risk of device is larger.
In sum, the accumulation energy type regenerative braking energy in urban rail regenerating braking energy recovery method, based on super capacitor
Amount way of recycling can realize that the braking energy in full power range absorbs, and super capacitor charging rate is fast, and power density is high,
The advantages of temperature range width, can most meet the characteristics of train braking time is short, and braking power is big, be current urban rail regenerative braking energy
The important research direction of amount recovery system.But at present application experience of the program at home in metro operation is considerably less, therefore
No matter the regenerating braking energy retracting device of super capacitor energy storage type is set in topological structure, power module design or control system
It is all not mature enough on meter, there is certain defect.The DC Traction Network net pressure of China's power supply of city railway system is generally DC1500V systems
Formula or DC750V standards, for both different DC Traction Network electric pressures, generally require respectively to regenerating braking energy
Retracting device carries out corresponding conceptual design, is unfavorable for the batch production of product.Current super capacitor energy storage type regenerative braking energy
The copped wave module of amount retracting device generally has that volume is big, switching frequency is low, it is impossible to accomplish the problem of hot plug.
The content of the invention
The technical problem to be solved in the present invention is：For the problems referred to above of prior art, there is provided one kind can be by urban rail again
Raw Brake energy recovery and feedback, can be common to two kinds of DC Traction Networks of DC1500V/DC750V, highly versatile, reliability
The high accumulation energy type urban rail regenerating braking energy recovery method based on super capacitor of height, good stability, low production cost, flexibility ratio
And system.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of accumulation energy type urban rail regenerating braking energy recovery method based on super capacitor, step include：
1）By the DC Traction Network of urban rail by the copped wave unit comprising two two-way copped wave modular units and super capacitor
Unit be connected, according to DC Traction Network configure two two-way copped wave modular units connected mode, when DC Traction Network is
During DC1500V, two two-way copped wave modular units are configured to into series connection, it is when DC Traction Network is DC750V, two-way by two
Copped wave modular unit is configured to parallel connection；The charging voltage threshold value V of Initialize installation DC Traction NetworkC1, discharge voltage threshold value
VF1And the charging upper limit voltage V of supercapacitive cellC2, electric discharge lower voltage limit VF2；
2）Real-time monitoring direct current net presses V1, super-capacitor voltage V2, dc bus floating voltage V10, wherein direct current net pressure V1
Refer to the voltage of DC Traction Network, super-capacitor voltage V2Refer to the voltage of supercapacitive cell, dc bus floating voltage V10
Refer to voltage during no-load current on DC Traction Network dc bus；When direct current net presses V1Change and determine that the change is turned to
Train traction, braking and cause net buckling when, when direct current net press V1Simultaneously greater than or equal to dc bus floating voltage V10
And charging voltage threshold value VC1When, redirect execution step 3）；When direct current net presses V1Simultaneously less than or equal to the unloaded electricity of dc bus
Pressure V10And discharge voltage threshold value VF1When, redirect execution step 4）；
3）Judge super-capacitor voltage V2Less than charging upper limit voltage VC2Whether set up, redirect if being false and perform step
Rapid 2）；If set up, it is super capacitor that the regenerating braking energy of DC Traction Network is passed through two two-way copped wave modular units
Unit charges, and direct current net pressure V is monitored in charging process1With super-capacitor voltage V2If, direct current net pressure V1It is less than or equal to
Charging voltage threshold value VC1Or super-capacitor voltage V2More than or equal to charging upper limit voltage VC2, then stop as supercapacitive cell
Charge and redirect execution step 2）；
4）Judge super-capacitor voltage V2More than electric discharge lower voltage limit VF2Whether set up, redirect if being false and perform step
Rapid 2）；If set up, supercapacitive cell is allowed to discharge through into two two-way copped wave modular units and is provided for DC Traction Network
Voltage compensation, and direct current net pressure V is monitored in discharge process1With super-capacitor voltage V2If, direct current net pressure V1It is more than or equal to
Discharge voltage threshold value VF1Or super-capacitor voltage V2Less than or equal to electric discharge lower voltage limit VF2, then stop supercapacitive cell and put
Electricity simultaneously redirects execution step 2）.
Preferably, the two-way copped wave modular unit includes a two-way DC/DC copped waves module or comprising two or more
The two-way DC/DC copped waves module being connected in parallel, the step 3）In for supercapacitive cell charge detailed step include：For each
Individual two-way DC/DC copped waves module assignment reference current value ia_ref；For each two-way DC/DC copped waves module, two-way DC/ is gathered
The input current i of DC copped wave modulesa, by reference current value ia_refWith input current iaIt is compared, then will compares what is obtained
Difference Jing PI controllers send into pulse width modulation module, are generated for controlling two-way DC/DC copped waves module by pulse width modulation module
Trigger pulse realizing the constant-current charge to supercapacitive cell；The step 4）It is middle by supercapacitive cell discharge it is detailed
Step includes：Given outer shroud reference voltage levelU dc_ref , detect the DC voltage of two-way DC/DC copped waves moduleU dc , outer shroud is referred to
Magnitude of voltageU dc_ref And DC voltageU dc It is compared, then will compares the difference Jing PI controllers that obtain and be output as reference current
Value ia_ref, gather the input current i of two-way DC/DC copped waves modulea, by reference current value ia_refWith input current iaCompared
Compared with then comparing the difference Jing PI controllers that obtain and send into pulse width modulation module, be generated for controlling by pulse width modulation module
The trigger pulse of two-way DC/DC copped waves module is made to realize the voltage stabilizing to DC Traction Network.
Preferably, it is described for each two-way DC/DC copped waves module assignment reference current value ia_refWhen, detect first same
Whether all two-way DC/DC copped waves module under two-way copped wave modular unit breaks down, if two-way DC/DC copped waves module
Break down, and remaining normal two-way DC/DC copped waves module disclosure satisfy that the power demand of the two-way copped wave modular unit, then
The reference current value of all two-way DC/DC copped waves module for breaking down is averagely allocated under the two-way copped wave modular unit which
Remaining normal each two-way DC/DC copped waves module.
A kind of accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor, including copped wave unit, super electricity
Hold unit, chop control module and direct-current isolating switch unit, the copped wave unit includes two two-way copped wave modular units, institute
The grid side connection terminal for stating two-way copped wave modular unit is connected with the DC Traction Network of urban rail by direct-current isolating switch unit,
Capacitive side connection terminal and supercapacitive cell are connected in parallel, when DC Traction Network is DC1500V, two two-way copped wave modules
Unit is connected in series；When DC Traction Network is DC750V, two two-way copped wave modular units are connected in parallel, the two-way copped wave
The two-way DC/DC copped waves module that modular unit includes a two-way DC/DC copped waves module or is connected in parallel comprising two or more,
The outfan of the chop control module is connected with the control end of two-way DC/DC copped waves module.
Preferably, the two-way DC/DC copped waves module is the two-way chopper circuit of three level, the two-way copped wave electricity of three level
Road includes pre-charge circuit, Support Capacitor C1 and a plurality of two-way DC/DC copped waves branch road in parallel, the Support Capacitor C1 and two-way
DC/DC copped waves branch circuit parallel connection connects, and the two-way DC/DC copped waves route striding capacitance Cd and contain parallel connected in reverse phase diode
Four IGBT units composition, the IGBT units are small-power high-frequency I GBT unit, and four IGBT units are connected into chain,
The positive pole of grid side connection terminal is connected to after the connection end a series connection pre-charge circuits of first-in-chain(FIC), the connection end e of last-of-chain is connected to simultaneously
The negative pole of grid side connection terminal and capacitive side connection terminal, in the chain between second IGBT unit and the 3rd IGBT unit
Connection end c concatenate a direct current reactor L1 after be connected to the positive pole of capacitive side connection terminal, the one of the striding capacitance Cd
End is connected in the chain connection end b between first IGBT unit and second IGBT unit, the other end and is connected in the chain
Connection end d between 3rd IGBT unit and the 4th IGBT unit.
Preferably, the pre-charge circuit includes main contactor KM1, charging contactor KM2 and charging resistor R1, described to fill
It is connected in parallel with main contactor KM1 after electric contactor KM2 and charging resistor R1 are connected in series.
Preferably, it is connected in parallel between the positive pole and negative pole of the grid side connection terminal of the two-way copped wave modular unit
First isolation capacitance C2, is connected in parallel between the positive pole and negative pole of the capacitive side connection terminal of the two-way copped wave modular unit
Second isolation capacitance C3.
Preferably, the two-way DC/DC copped waves module is packaged in movable pulling/inserting structure, the two-way copped wave modular unit
Including the fixed pulling/inserting structure for coordinating with movable pulling/inserting structure, the movable pulling/inserting structure is inserted in fixed pulling/inserting structure
In.
Preferably, the chop control module includes voltage sensor, reference voltage module, first comparator, a PI
Controller, selector, reference current module, current sensor, the second comparator, the 2nd PI controllers and PWM generator, it is described
Voltage sensor is parallel to the capacitive side connection terminal of two-way DC/DC copped waves module, and the current sensor is series at two-way DC/
The positive pole of the grid side connection terminal of DC copped wave modules, two inputs of the first comparator respectively with voltage sensor,
Reference voltage module is connected, and the outfan of the first comparator and a PI controllers are connected, and two of the selector are defeated
Enter end to be connected with reference current module, a PI controllers respectively, two inputs of second comparator are respectively and electric current
Sensor, the outfan of selector are connected, and the outfan of second comparator passes sequentially through the 2nd PI controllers, PWM to be occurred
Device is connected with the control end of each IGBT unit in two-way DC/DC copped waves module.
Preferably, the copped wave unit is also included for two two-way copped wave modular units are switched to serial or parallel connection
Net pressure adaptation switch, the net pressure adaptation switch is including the first disconnecting switch QS2 and the second disconnecting switch for being hilted broadsword double end
QS3, the armature contact of first disconnecting switch QS2 are connected to the grid side connection terminal of a two-way copped wave modular unit
Negative pole, the armature contact of second disconnecting switch QS3 are connected to the grid side connection end of another two-way copped wave modular unit
The positive pole of son；One fixed contact of first disconnecting switch QS2 is connected to the negative electrode bus of DC Traction Network, another is solid
One fixed contact of then with the second disconnecting switch QS3 of fixed contact is connected, and another of second disconnecting switch QS3 fixes tactile
Point is then connected to the positive electrode bus of DC Traction Network.
Preferably, the direct-current isolating switch unit includes disconnecting switch QS1 and smoothing reactor L2, the two-way copped wave
The grid side connection terminal of modular unit is connected with the DC Traction Network of urban rail by disconnecting switch QS1, and smoothing reactor L2
It is series between the grid side connection terminal positive pole and disconnecting switch QS1 of two-way copped wave modular unit.
Accumulation energy type urban rail regenerating braking energy recovery method tool of the present invention based on super capacitor has the advantage that：
1st, the present invention is by the DC Traction Network of urban rail is by the copped wave unit comprising two two-way copped wave modular units and surpasses
Level capacitor cell be connected, according to DC Traction Network configure two two-way copped wave modular units connected mode, work as DC traction
When net is DC1500V, two two-way copped wave modular units are configured to into series connection, when DC Traction Network is DC750V, by two
Two-way copped wave modular unit is configured to parallel connection, therefore, it is possible to be applied to DC1500V, DC750V direct current of country's subway main flow at present
Tractive power supply system, can be switched by the connected mode of two two-way copped wave modular units, realize two kinds of direct-current traction power supply systems
It is switched fast in system, therefore substantially increases the versatility and flexibility ratio of system, is conducive to the batch production of product；
2nd, charging voltage threshold value V of the present invention by setting DC Traction NetworkC1, discharge voltage threshold value VF1And it is super
The charging upper limit voltage V of level capacitor cellC2, electric discharge lower voltage limit VF2, the real-time monitoring direct current net during city rail train
Pressure V1, super-capacitor voltage V2, dc bus floating voltage V10, V is pressed based on direct current net1, super-capacitor voltage V2, dc bus
Floating voltage V10To control urban rail regenerating braking energy to be stored in supercapacitive cell when urban rail is braked, and arrange in urban rail
By the electric energy feedback stored in supercapacitive cell to DC Traction Network ensureing the net work voltage stable of DC Traction Network when car starts.
3rd, two-way copped wave modular unit of the invention further includes a two-way DC/DC copped waves module or comprising two
The two-way DC/DC copped waves module of more parallel connection, can meet different capacity requirement, and when charging to supercapacitive cell, pin
Constant-current charge is realized using independent current closed-loop to each two-way DC/DC copped waves module；When discharging to supercapacitive cell,
Public outer voltage is adopted to all two-way DC/DC copped waves modules, for each two-way DC/DC copped waves module using independent
Current inner loop, using outer voltage, the double-closed-loop control of current inner loop, hence in so that the direct current net pressure of DC Traction Network is more
It is stable.
4th, the present invention is for each two-way DC/DC copped waves module assignment reference current value ia_refWhen, further detect same
Whether all two-way DC/DC copped waves module under two-way copped wave modular unit breaks down, and cuts in one or more two-way DC/DC
During ripple module failure, if remaining two-way DC/DC copped waves module can meet power requirement, system by automatic distribution power and after
Reforwarding row, this will be greatly enhanced the stability and reliability of system operation.
Accumulation energy type urban rail regenerating braking energy retracting device tool of the present invention based on super capacitor has the advantage that：
1st, the present invention includes copped wave unit, supercapacitive cell, chop control module and direct-current isolating switch unit, described
Copped wave unit includes two two-way copped wave modular units, and the grid side connection terminal of the two-way copped wave modular unit passes through direct current
Disconnecting switch unit is connected with the DC Traction Network of urban rail, capacitive side connection terminal and supercapacitive cell are connected in parallel, when straight
When stream Traction networks are DC1500V, two two-way copped wave modular units are connected in series；When DC Traction Network is DC750V, two
Two-way copped wave modular unit is connected in parallel, and the two-way copped wave modular unit includes a two-way DC/DC copped waves module or bag
Containing the two-way DC/DC copped waves module that two or more is connected in parallel, the outfan of the chop control module and two-way DC/DC copped waves
The control end of module is connected, and when DC Traction Network is DC1500V, two two-way copped wave modular units is configured to series connection, when
When DC Traction Network is DC750V, two two-way copped wave modular units are configured to into parallel connection, therefore, it is possible to be applied to the current country
DC1500V, DC750V DC traction power-supply system of subway main flow, can pass through the connected mode of two two-way copped wave modular units
Switching, is switched fast in realizing two kinds of DC traction power-supply systems, therefore substantially increases the versatility and flexibility ratio of system, have
Beneficial to the batch production of product.
2nd, two-way DC/DC copped waves module of the invention is further the two-way chopper circuit of three level, the two-way copped wave of three level
Circuit includes pre-charge circuit, Support Capacitor C1 and a plurality of two-way DC/DC copped waves branch road in parallel, and wherein IGBT units are little work(
Rate high-frequency I GBT unit so that the switching frequency of two-way DC/DC copped waves module reaches 20kHz, far above change flow module master at present
Stream switching frequency, and module integrated level is high, small volume.
3rd, the present invention is improved for switching frequency and causes serious sound pollution and switching loss problem, is further employed
Four IGBT units are connected into chain and coordinate other components and parts to constitute the two-way chopper circuit of three level by Sofe Switch control technology
Each two-way DC/DC copped waves branch road, four IGBT units are worked under output varying level state in a complementary fashion, straight
In the presence of stream reactor L1, each IGBT unit has electric current to flow through its antiparallel diode, both end voltage before opening
It is lowered by 0 so that IGBT units meet the no-voltage of Sofe Switch control technology and open condition, so as in HF switch frequency
Under can effectively reduce switching loss and noise pollution, and while direct current reactor L1 and Support Capacitor C1 can absorb ripple
Electric current, improves the output quality of power supply.
4th, two-way DC/DC copped waves module of the invention is further packaged in movable pulling/inserting structure, two-way copped wave module list
Unit includes the fixed pulling/inserting structure for coordinating with movable pulling/inserting structure, and movable pulling/inserting structure is inserted in fixed pulling/inserting structure,
Based on the cooperation between movable pulling/inserting structure and fixed pulling/inserting structure, and the protection based on pre-charge circuit, can realize two-way
The warm connection function of DC/DC copped wave modules, the installation and maintenance of convenient bidirectional DC/DC copped wave modules；And realizing two-way DC/
On the basis of the warm connection function of DC copped wave modules, can coordinate connection terminal short circuit in fixed pulling/inserting structure so that two-way DC/
DC copped wave modules meet different capacity requirement, configure more flexible and convenient.
Description of the drawings
Method basic procedure schematic diagrams of the Fig. 1 for the embodiment of the present invention one.
Fig. 2 is that the control strategy schematic diagram of discharge and recharge is carried out to supercapacitive cell in the embodiment of the present invention one.
Fig. 3 is the control strategy schematic diagram of outer voltage in the embodiment of the present invention one.
Circuit theory schematic diagrams of the Fig. 4 for the embodiment of the present invention one.
Fig. 5 is the circuit theory schematic diagram of two-way DC/DC copped waves module in the embodiment of the present invention one.
Fig. 6 is the circuit theory schematic diagram of chop control module in the embodiment of the present invention one.
Circuit theory schematic diagrams of the Fig. 7 for the embodiment of the present invention two.
Circuit theory schematic diagrams of the Fig. 8 for the embodiment of the present invention three.
Marginal data：1st, copped wave unit；10th, two-way copped wave modular unit；11st, pre-charge circuit；12nd, net pressure adaptation is opened
Close；2nd, supercapacitive cell；3rd, chop control module；31st, voltage sensor；32nd, reference voltage module；33rd, first comparator；
34th, a PI controllers；35th, selector；351st, reference current module；36th, current sensor；37th, the second comparator；38th,
Two PI controllers；39th, PWM generator；4th, direct-current isolating switch unit.
Specific embodiment
Embodiment one：
As shown in figure 1, the step of accumulation energy type urban rail regenerating braking energy recovery method of the present embodiment based on super capacitor
Including：
1）By the DC Traction Network of urban rail by the copped wave unit 1 comprising two two-way copped wave modular units 10 and super electricity
Hold unit 2 to be connected, according to DC Traction Network configure the connected mode of two two-way copped wave modular units 10, it is straight in the present embodiment
When stream Traction networks are DC1500V, two two-way copped wave modular units 10 are manually configured as into series connection；Initialize installation DC traction
The charging voltage threshold value V of netC1, discharge voltage threshold value VF1And the charging upper limit voltage V of supercapacitive cell 2C2, electric discharge
Lower voltage limit VF2；
2）Real-time monitoring direct current net presses V1, super-capacitor voltage V2, dc bus floating voltage V10, wherein direct current net pressure V1
Refer to the voltage of DC Traction Network, super-capacitor voltage V2Refer to the voltage of supercapacitive cell 2, dc bus floating voltage V10
Refer to voltage during no-load current on DC Traction Network dc bus；When direct current net presses V1Change and determine that the change is turned to
Train traction, braking and cause net buckling when, when direct current net press V1Simultaneously greater than or equal to dc bus floating voltage V10
And charging voltage threshold value VC1When, redirect execution step 3）；When direct current net presses V1Simultaneously less than or equal to the unloaded electricity of dc bus
Pressure V10And discharge voltage threshold value VF1When, redirect execution step 4）；
3）Judge super-capacitor voltage V2Less than charging upper limit voltage VC2Whether set up, redirect if being false and perform step
Rapid 2）；If set up, it is super electricity that the regenerating braking energy of DC Traction Network is passed through two two-way copped wave modular units 10
Hold unit 2 to charge, and direct current net pressure V is monitored in charging process1With super-capacitor voltage V2If, direct current net pressure V1Less than or
Equal to charging voltage threshold value VC1Or super-capacitor voltage V2More than or equal to charging upper limit voltage VC2, then stop as super capacitor
Unit 2 charges and redirects execution step 2）Wait subsequent instructions；
4）Judge super-capacitor voltage V2More than electric discharge lower voltage limit VF2Whether set up, redirect if being false and perform step
Rapid 2；If set up, supercapacitive cell 2 is allowed to discharge through into two two-way copped wave modular units 10 and is carried for DC Traction Network
Voltage supplied is compensated, and direct current net pressure V is monitored in discharge process1With super-capacitor voltage V2If, direct current net pressure V1More than or wait
In discharge voltage threshold value VF1Or super-capacitor voltage V2Less than or equal to electric discharge lower voltage limit VF2, then stop supercapacitive cell
2 discharge and redirect execution step 2）Wait subsequent instructions.
The present embodiment step 2）In, direct current net pressure V1, super-capacitor voltage V2Can be obtained with direct measurement, dc bus is empty
Carry voltage V10Affected by the net pressure of the connected middle pressure AC network of DC Traction Network, in can passing through to measure in the electric substation for obtaining in real time
Calculate after pressure alternating current net side synchronizing voltage；Step 2）Only when direct current net presses V1Also include when changing that excluding net press dry
The step of disturbing, for non-train traction, braking and the net buckling that causes, it is to avoid maloperation；When it is determined that direct current net buckling is
Caused by train operation, then carry out the judgement of system running state.
In the present embodiment, two-way copped wave modular unit 10 includes three two-way DC/DC copped waves modules being connected in parallel；Need
Illustrate, two-way copped wave modular unit 10 can need the number of the two-way DC/DC copped waves module for selecting parallel connection, example according to power
A two-way DC/DC copped wave module, or the two-way DC/DC copped wave that using two is connected in parallel can also be adopted as needed such as
Module, or using more two-way DC/DC copped waves modules being connected in parallel.
In the present embodiment, the control of two-way DC/DC copped waves module is then different according to discharge and recharge operating mode difference.Such as Fig. 2 institutes
Show, step 3）In be charged as closed-loop current control for supercapacitive cell 2, detailed step includes：For each two-way DC/DC copped wave
Module assignment reference current value ia_ref；For each two-way DC/DC copped waves module, the defeated of two-way DC/DC copped waves module is gathered
Enter electric current ia, by reference current value ia_refWith input current iaIt is compared, then will compares the difference Jing PI controllers for obtaining
Pulse width modulation module is sent into, trigger pulse for controlling two-way DC/DC copped waves module is generated with reality by pulse width modulation module
The existing constant-current charge to supercapacitive cell 2；Step 4）It is middle that supercapacitive cell 2 discharges using outer voltage, current inner loop
Double-closed-loop control, detailed step includes：Given outer shroud reference voltage levelU dc_ref , detect the direct current of two-way DC/DC copped waves module
VoltageU dc , by outer shroud reference voltage levelU dc_ref And DC voltageU dc It is compared, then will compares the difference Jing PI controls for obtaining
Device processed is output as reference current value ia_ref, gather the input current i of two-way DC/DC copped waves modulea, by reference current value ia_refWith
Input current iaIt is compared, then will compares the difference Jing PI controllers feeding pulse width modulation module for obtaining, and be adjusted by pulsewidth
Molding block generates trigger pulse for controlling two-way DC/DC copped waves module to realize the voltage stabilizing to DC Traction Network, so as to reach
V is pressed to stable DC net1Function.When charging to supercapacitive cell 2, adopt for each two-way DC/DC copped waves module
Independent current closed-loop realizes constant-current charge；When discharging to supercapacitive cell 2, all two-way DC/DC copped waves modules are adopted
Public outer voltage, adopts independent current inner loop for each two-way DC/DC copped waves module, using outer voltage, electricity
The double-closed-loop control of stream internal ring, hence in so that the direct current net pressure of DC Traction Network is more stable.
As shown in figure 3, the present embodiment is adopted for multiple two-way DC/DC copped waves modules shares outer voltage, separate current
The control strategy of internal ring, with two two-way DC/DC copped waves moulds of two-way DC/DC copped waves module #1 and two-way DC/DC copped waves module #2
As a example by block, outer voltage is output as reference current value ia_refSimultaneously as two-way DC/DC copped waves module #1 and two-way DC/DC copped waves
The reference input value of the current inner loop of module #2.
In the present embodiment, it is each two-way DC/DC copped waves module assignment reference current value ia_refWhen, detect first same
Whether all two-way DC/DC copped waves module under two-way copped wave modular unit 10 breaks down, if two-way DC/DC copped waves mould
Block breaks down, and remaining normal two-way DC/DC copped waves module disclosure satisfy that the power of the two-way copped wave modular unit 10 is needed
Ask, then the reference current value of all two-way DC/DC copped waves module for breaking down is averagely allocated to into the two-way copped wave module list
10 times remaining normal each two-way DC/DC copped waves modules of unit, so as to realize distributing automatically operation power, regenerating braking energy
Recovery system will continue normal operation, and the system that substantially reduces is hindered probability out of service by for some reason such that it is able to improve system
Stability and reliability.By taking the two-way copped wave modular unit 10#1 in Fig. 4 as an example, when systems are functioning properly, it is assumed that two-way to cut
The current closed-loop reference value of each two-way DC/DC copped waves module of ripple modular unit 10#1 is i1, when first two-way DC/DC cuts
When ripple module hinders out of service for some reason, in the case where remaining two two-way DC/DC copped waves modules can meet power requirement, the
Two two-way DC/DC copped waves modules, the current closed-loop reference values of three two-way DC/DC copped waves modules are changed into 3/2i1, i.e., first
The power of individual two-way DC/DC copped waves module operation be allocated to remaining normal second two-way DC/DC copped waves module, three
In two-way DC/DC copped waves module.
As shown in figure 4, the present embodiment includes cutting based on the accumulation energy type urban rail regenerative braking energy reclaiming system of super capacitor
Ripple unit 1, supercapacitive cell 2, chop control module（Do not draw in Fig. 4, detailed construction can be found in Fig. 6）Open with DC-isolation
Unit 4 is closed, copped wave unit 1 includes two two-way copped wave modular units 10, the grid side connection end of two-way copped wave modular unit 10
Son is connected with the DC Traction Network of urban rail by direct-current isolating switch unit 4, capacitive side connection terminal and supercapacitive cell 2 simultaneously
Connection connection, two two-way copped wave modular units 10 are connected in series, two-way copped wave modular unit 10 include three be connected in parallel it is double
To DC/DC copped wave modules, the outfan of chop control module is connected with the control end of two-way DC/DC copped waves module.Two-way DC/DC
Copped wave module can complete the boosting of voltage, buck functionality, realize the two-way flow of dc power, so as to lead in municipal rail train braking
When causing direct current net pressure to raise, regenerating braking energy recovery is flowed to into supercapacitive cell 2 from DC Traction Network and is stored；Work as city
When rail launch train causes direct current net pressure drop low, the electric energy that supercapacitive cell 2 is stored is flowed to from supercapacitive cell 2
DC Traction Network is ensureing the voltage stabilizing of DC Traction Network.
The DC Traction Network of the present embodiment is DC1500V, therefore two-way copped wave modular unit 10#1 and two-way copped wave module
Unit 10#2 being manually configured as is connected in series, and two-way copped wave modular unit 10#1 and two-way copped wave modular unit 10#2 difference
Independently it is connected with a supercapacitive cell 2, the knot of two-way copped wave modular unit 10#1 and two-way copped wave modular unit 10#2
Structure is identical, all including three two-way DC/DC copped waves modules being connected in parallel, and can need to select parallel connection according to power
The number of two-way DC/DC copped waves module.When DC Traction Network is DC750V, then two-way copped wave modular unit 10#1 and two-way cut
Ripple modular unit 10#2 should be configured to be connected in parallel, therefore be based on two-way copped wave modular unit 10#1 and two-way copped wave module
The change of the annexation of unit 10#2, the system of the present embodiment can be suitably used for two kinds of subway DC tractions of DC1500V, DC750V
Electric power system.
Two-way DC/DC copped waves module is used to realize that the energy between the DC Traction Network of energy and supercapacitive cell 2 is double
To flowing, its basic structure can be equivalent to a boost chopper and a buck circuit inverse parallel.As shown in figure 5,
Two-way DC/DC copped waves module in the present embodiment is the two-way chopper circuit of three level, and the two-way chopper circuit of three level includes preliminary filling
Circuit 11, Support Capacitor C1 and six two-way DC/DC copped waves branch road in parallel, Support Capacitor C1 and two-way DC/DC copped waves
Road is connected in parallel, two-way DC/DC copped waves route striding capacitance Cd and four IGBT unit groups containing parallel connected in reverse phase diode
It is small-power high-frequency I GBT unit into, IGBT units, four IGBT units are connected into chain, the connection end a series connection preliminary fillings of first-in-chain(FIC)
The positive pole of grid side connection terminal is connected to after circuit 11, the connection end e of last-of-chain is connected to grid side connection terminal and electricity simultaneously
Hold the negative pole of side connection terminal, the connection end c in the chain between second IGBT unit and the 3rd IGBT unit concatenates one
The positive pole of capacitive side connection terminal is connected to after direct current reactor L1, one end of striding capacitance Cd is connected to first in the chain
Connection end b, the other end between IGBT units and second IGBT unit is connected to the 3rd IGBT unit and the 4th in the chain
Connection end d between individual IGBT units.The two-way chopper circuit of three level of the present embodiment has small volume, switching frequency height, collection
Into degree height, the advantage of efficiency high.
Preliminary filling electrical circuit 11 charges for giving Support Capacitor C1, it is to avoid during input, Support Capacitor C1 has excessive impact electricity
Stream, causes to damage to two-way DC/DC copped waves module.As shown in figure 5, pre-charge circuit 11 includes main contactor KM1, charge contact
It is connected in parallel with main contactor KM1 after device KM2 and charging resistor R1, charging contactor KM2 and charging resistor R1 are connected in series.In advance
During charging, main contactor KM1 disconnects, charging contactor KM2 is closed, and limits electric current by charging resistor R1, fills to Support Capacitor C1
Electricity；After the completion of precharge, charging contactor KM2 disconnects, main contactor KM1 closures, so that Support Capacitor C1 and direct current reactance
Device L1 carries out voltage stabilizing peace ripple to two-way DC/DC copped waves module, prevents the impact to two-way DC/DC choppers because of load changing.
The two-way DC/DC copped waves module of the present embodiment is integrated with pre-charge circuit 11, Support Capacitor C1 and six two-way DC/DC in parallel
Copped wave branch road, integrated level are high, and compare traditional copped wave module and can greatly reduce volume.Additionally, the two-way DC/DC of the present embodiment
Copped wave module is also integrated with the components and parts such as before and after's catalyst, fastp-acting fuse, dc-link capacitance, varistor, radiator fan.
Catalyst can cut off the connection of two-way DC/DC copped waves module and main circuit in two-way DC/DC copped waves module failure in front and back；Quickly
Fuse quick fuse can be protected in the case where there is short circuit current, it is to avoid damage of the short circuit current to two-way DC/DC copped waves module
It is bad；The voltage stabilizing of dc-link capacitance energy and suppression rush of current；Varistor is used to avoid transient overvoltage to two-way DC/DC copped waves
The damage of module；Radiator fan can give two-way DC/DC copped waves module heat dissipating.
Support Capacitor C1 has voltage stabilizing peace ripple effect, constitutes filter circuit with direct current reactor L1, can prevent because of load
Impact of the mutation to two-way DC/DC copped waves module.
The two-way chopper circuit input direct voltage U of three leveldc, four IGBT based on the two-way DC/DC copped waves branch road per bar
The control of unit can make output+Udc/2、0、-Udc/ 2 three kinds of level.The two-way chopper circuit of three level of the present embodiment includes six
Bar two-way DC/DC copped waves branch road in parallel, therefore for a two-way DC/DC copped waves module, six two-way DC/ in parallel
DC copped waves branch road is controlled using phase-shifting carrier wave mode, realizes more preferable equivalent switching frequency, and phase-shifting carrier wave technology passes through will
Carrier wave uniformly translates certain phase place to be modulated two-way DC/DC choppers, and phase shift 360/N modes, i.e. tuple are 6 weights
When, the often uniform phase shift of the carrier wave between weight 60.Therefore, the present embodiment is only shown with six two-way DC/DC copped waves branch roads in parallel
Example property explanation, certainly also dependent on needing to adopt other quantity（N）The two-way chopper circuit of three level come it is in parallel constitute three
The two-way chopper circuit of level.Two-way DC/DC copped waves module in existing power supply of city railway system（Using high power low-frequency IGBT units）
Switching frequency be 1～2kHz, the IGBT units of the present embodiment are small-power high-frequency I GBT unit so that single two-way DC/DC
The equivalent switching frequency of copped wave module reaches 20kHz, has the advantages that switching frequency height, efficiency high.
Reduce can the raising of the output quality of power supply, harmonic wave it should be noted that, although switching frequency is improved, but while
Serious sound pollution and switching loss can be caused.In order to effectively reduce switching loss and noise pollution, the present embodiment is adopted
Four IGBT units are connected into chain and coordinate other components and parts to constitute the two-way chopper circuit of three level by Sofe Switch control technology
Each two-way DC/DC copped waves branch road, four IGBT units output varying level state under work in a complementary fashion,
In the presence of direct current reactor L1, each IGBT unit has electric current to flow through its antiparallel diode, two ends electricity before opening
Pressure is lowered by 0 so that IGBT units meet the no-voltage of Sofe Switch control technology and open condition, so as in HF switch frequency
Switching loss and noise pollution can effectively be reduced under rate, and while direct current reactor L1 and Support Capacitor C1 can absorb stricture of vagina
Ripple electric current, improves the output quality of power supply.
One end of striding capacitance Cd is connected in the chain connection between first IGBT unit and second IGBT unit
End b, the other end are connected in the chain connection end d between the 3rd IGBT unit and the 4th IGBT unit, defeated for causing
Enter voltage to divide equally between each IGBT units of series connection, to reduce the voltage stress of each IGBT units.
Certainly, a boost chopper and a buck chopper can be equivalent to based on two-way DC/DC copped waves module
The antiparallel basic structure of circuit, it is also possible to the DC Traction Network and super capacitor of energy can be realized using other as needed
The two-way DC/DC copped waves module of the energy in bidirectional flow between unit 2.
As shown in figure 4, being connected in parallel between the positive pole and negative pole of the grid side connection terminal of two-way copped wave modular unit 10
There is the first isolation capacitance C2, be connected in parallel between the positive pole and negative pole of the capacitive side connection terminal of two-way copped wave modular unit 10
Second isolation capacitance C3.
In the present embodiment, two-way DC/DC copped waves module is packaged in movable pulling/inserting structure, and two-way copped wave modular unit 10 is wrapped
The fixed pulling/inserting structure for coordinating with movable pulling/inserting structure is included, movable pulling/inserting structure is inserted in fixed pulling/inserting structure.It is existing
The two-way DC/DC copped waves module of technology is affected by factors such as volumes, does not possess the integration of height, no integrated precharge electricity
Road 11（Soft charge loop）, it is impossible to hot plug is realized, if carrying out hot plug in two-way DC/DC copped waves module not power-off, will
There can be larger dash current to Support Capacitor C1 and power device, affect the life-span of two-way DC/DC copped waves module.The present embodiment
Two-way DC/DC copped waves module be fast inserting structure, and due to the two-way DC/DC copped waves module of the present embodiment integrated precharge electricity
Road 11, can suppress dash current during hot plug, therefore, it is possible to realize warm connection function, can be to mould in the case of not power-off
Block carry out into and out operation.
As shown in fig. 6, chop control module include voltage sensor 31, reference voltage module 32, first comparator 33,
One PI controllers 34, selector 35, reference current module 351, current sensor 36, the second comparator 37, the 2nd PI controllers
38 and PWM generator 39, the voltage sensor 31 is parallel to the capacitive side connection terminal of two-way DC/DC copped waves module, described
Current sensor 36 is series at the positive pole of the grid side connection terminal of two-way DC/DC copped waves module, the first comparator 33
Two inputs are connected with voltage sensor 31, reference voltage module 32 respectively, the outfan of the first comparator 33 and
One PI controllers 34 are connected, two inputs of the selector 35 respectively with reference current module 351, a PI controllers 34
It is connected, two inputs of second comparator 37 are connected with the outfan of current sensor 36, selector 35 respectively, described
The outfan of the second comparator 37 passes sequentially through each in the 2nd PI controllers 38, PWM generator 39 and two-way DC/DC copped waves module
The control end of individual IGBT units is connected.The charge and discharge control strategy of the structure and Fig. 2 of chop control module is mutually corresponded to, to super
When capacitor cell 2 charges, constant-current charge is realized using independent current closed-loop for each two-way DC/DC copped waves module；It is right
When supercapacitive cell 2 discharges, all two-way DC/DC copped waves modules are adopted with public outer voltage, it is two-way for each
DC/DC copped waves module adopts independent current inner loop, using outer voltage, the double-closed-loop control of current inner loop, hence in so that directly
The direct current net pressure of stream Traction networks is more stable.
In the present embodiment, chop control module also includes the communication interface being connected with host computer, chop control module conduct
The lower computer control system of lower floor, and the two-layer control system that the upper computer control system composition on upper strata is engaged, host computer control
System processed is analyzing logic control, for system administration, monitoring, performs the input of equipment, removes, test etc. and operate, slave computer
Control system receives the instruction from host computer, controls the operation of copped wave module, realizes failure protection function, and upload copped wave mould
The state parameter of block and super capacitor such that it is able to realize super capacitor discharge and recharge, system failure protection, stable DC well
The functions such as busbar voltage, reach the purpose of the recycling of train braking energy.Certainly, the charge and discharge control plan of Fig. 2
Slightly can both pass through the hardware configuration shown in Fig. 6 to realize, it is also possible to the part in addition to sensor is realized by software programming, example
Processed such as by the CPU in processor or host computer.
As shown in figure 4, direct-current isolating switch unit 4 includes disconnecting switch QS1 and smoothing reactor L2, two-way copped wave module
The grid side connection terminal of unit 10 is connected with the DC Traction Network of urban rail by disconnecting switch QS1, and smoothing reactor L2 strings
It is coupled between the grid side connection terminal positive pole and disconnecting switch QS1 of two-way copped wave modular unit 10.Disconnecting switch QS1 is used for real
The buffer action of existing two-way DC/DC copped waves cabinet and DC Traction Network, smoothing reactor L2 are used to suppress voltage pulsation.
In the present embodiment, copped wave unit 1 is installed in a copped wave cabinet, and direct-current isolating switch unit 4 is installed in one
In individual direct current isolating switch cabinet, supercapacitive cell 2 is then installed in a super capacitor cabinet.As shown in figure 4, super capacitor
Unit 2 is made up of catalyst K1, discharge resistance R2, catalyst KM3 and super capacitor array, discharge resistance R2, catalyst KM3 string
Connection forms discharge loop, and the catalyst KM3 in normally open is only just closed when needing to discharge super capacitor array, is put
Electrical circuit is connected with external circuit after series contactor K1 after connecting with super capacitor array in parallel again.
In sum, accumulation energy type regenerative braking energy reclaiming system of the present embodiment based on super capacitor can be in train braking
When, by braking energy is by the blood pressure lowering of two-way DC/DC choppers and is stored in supercapacitive cell 2, when train traction starts,
The energy of storage in supercapacitive cell 2 can be boosted output by copped wave unit 1, for train use, and stable DC bus
Voltage, has the advantages that highly versatile, motility are high, reliability is high, small volume, it is adaptable to current country's subway main flow
DC1500V, DC750V DC traction power-supply system, and the two-way DC/DC copped waves module of high frequency can meet different power
Require, two-way DC/DC copped waves module can realize hot plug, and can be in one or more two-way DC/DC copped waves module failures and surplus
Remaining two-way DC/DC copped waves module continues normal operation in the case of meeting power requirement, device volume is little, low cost.
Embodiment two：
The present embodiment is essentially identical with embodiment one, and its main difference is：DC Traction Network is DC750V, step 1）Root
According to DC Traction Network configure two two-way copped wave modular units 10 connected mode when, by two two-way copped wave modular units 10
Parallel connection is manually configured as, its concrete connection is as shown in Figure 7.It is additionally, since two two-way copped wave modular units 10 to be manually configured as
Parallel connection, therefore two supercapacitive cells 2 can be reduced to one；Certainly, it is also possible to still adopt as embodiment one
The stored energy mechanism of redundancy is built with two supercapacitive cells 2.
Embodiment three：
The present embodiment is essentially identical with embodiment one, and its main difference is：Copped wave unit 1 is also included for double by two
The net of serial or parallel connection is switched to press adaptation switch 12, therefore step 1 to copped wave modular unit 10）According to DC Traction Network match somebody with somebody
It is when putting the connected mode of two two-way copped wave modular units 10, two-way particular by operation net pressure adaptation 12 configurations two of switch
The connected mode of copped wave modular unit 10.Quickly two-way copped wave module can be gone here and there simultaneously by operating net pressure adaptation switch 12
Connection, realizes separate unit system adaptation DC1500V standards, the function of DC750V standard DC traction power-supply systems, reduces system cost,
Install and debug simpler quick.
As shown in figure 8, in the present embodiment net pressure adaptation switch 12 include being hilted broadsword double end the first disconnecting switch QS2 and
Second disconnecting switch QS3, the armature contact of the first disconnecting switch QS2 are connected to the grid side of a two-way copped wave modular unit 10
The negative pole of connection terminal, the armature contact of the second disconnecting switch QS3 are connected to the electrical network of another two-way copped wave modular unit 10
The positive pole of side connection terminal；One fixed contact of the first disconnecting switch QS2 is connected to negative electrode bus of DC Traction Network, another
One fixed contact of then with the second disconnecting switch QS3 of individual fixed contact is connected, and another of the second disconnecting switch QS3 fixes tactile
Point is then connected to the positive electrode bus of DC Traction Network.When the running voltage of DC Traction Network is DC1500V, the first disconnecting switch
QS2 and the second disconnecting switch QS3 are connected to #0 positions, and now two two-way copped wave modular units 10 are configured to series connection；When straight
When the running voltage of stream Traction networks is DC750V, the first disconnecting switch QS2 is connected to #1 positions, the second disconnecting switch QS3 and is connected to #
2, now two two-way copped wave modular units 10 be configured to parallel connection.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of accumulation energy type urban rail regenerating braking energy recovery method based on super capacitor, it is characterised in that step includes：
1）By the DC Traction Network of urban rail by comprising two two-way copped wave modular units（10）Copped wave unit（1）With super electricity
Hold unit（2）Be connected, according to DC Traction Network configure two two-way copped wave modular units（10）Connected mode, when direct current leads
Draw net for DC1500V when, by two two-way copped wave modular units（10）Series connection is configured to, when DC Traction Network is DC750V,
By two two-way copped wave modular units（10）It is configured to parallel connection；The charging voltage threshold value V of Initialize installation DC Traction NetworkC1、
Discharge voltage threshold value VF1And supercapacitive cell（2）Charging upper limit voltage VC2, electric discharge lower voltage limit VF2；
2）Real-time monitoring direct current net presses V1, super-capacitor voltage V2, dc bus floating voltage V10, wherein direct current net pressure V1Refer to
The voltage of DC Traction Network, super-capacitor voltage V2Refer to supercapacitive cell（2）Voltage, dc bus floating voltage V10It is
Refer to voltage during no-load current on DC Traction Network dc bus；When direct current net presses V1Change and determine that the change turns to row
When car traction, the net buckling braked and cause, when direct current net presses V1Simultaneously greater than or equal to dc bus floating voltage V10And
Charging voltage threshold value VC1When, redirect execution step 3）；When direct current net presses V1Dc bus floating voltage is less than or equal to simultaneously
V10And discharge voltage threshold value VF1When, redirect execution step 4）；
3）Judge super-capacitor voltage V2Less than charging upper limit voltage VC2Whether set up, execution step is redirected if being false
2）；If set up, the regenerating braking energy of DC Traction Network is passed through into two two-way copped wave modular units（10）For super electricity
Hold unit（2）Charge, and direct current net pressure V is monitored in charging process1With super-capacitor voltage V2If, direct current net pressure V1It is less than
Or it is equal to charging voltage threshold value VC1Or super-capacitor voltage V2More than or equal to charging upper limit voltage VC2, then stop as super electricity
Hold unit（2）Charge and redirect execution step 2）；
4）Judge super-capacitor voltage V2More than electric discharge lower voltage limit VF2Whether set up, execution step is redirected if being false
2）；If set up, by supercapacitive cell（2）It is allowed to discharge through two two-way copped wave modular units（10）For DC Traction Network
Voltage compensation is provided, and direct current net pressure V is monitored in discharge process1With super-capacitor voltage V2If, direct current net pressure V1More than or
Equal to discharge voltage threshold value VF1Or super-capacitor voltage V2Less than or equal to electric discharge lower voltage limit VF2, then stop super capacitor list
Unit（2）Discharge and redirect execution step 2）.
2. the accumulation energy type urban rail regenerating braking energy recovery method based on super capacitor according to claim 1, its feature
It is：The two-way copped wave modular unit（10）It is including a two-way DC/DC copped waves module or in parallel even including two or more
The two-way DC/DC copped waves module for connecing, the step 3）In be supercapacitive cell（2）The detailed step of charging includes：For each
Two-way DC/DC copped waves module assignment reference current value ia_ref；For each two-way DC/DC copped waves module, two-way DC/DC is gathered
The input current i of copped wave modulea, by reference current value ia_refWith input current iaIt is compared, then will compares the difference for obtaining
Value Jing PI controllers send into pulse width modulation module, are generated for controlling two-way DC/DC copped waves module by pulse width modulation module
Trigger pulse is realizing to supercapacitive cell（2）Constant-current charge；The step 4）It is middle by supercapacitive cell（2）Electric discharge
Detailed step includes：Given outer shroud reference voltage levelU dc_ref , detect the DC voltage of two-way DC/DC copped waves moduleU dc , by outer shroud
Reference voltage levelU dc_ref And DC voltageU dc It is compared, then will compares the difference Jing PI controllers that obtain and be output as reference
Current value ia_ref, gather the input current i of two-way DC/DC copped waves modulea, by reference current value ia_refWith input current iaCarry out
Relatively, then the difference Jing PI controllers feeding pulse width modulation module for obtaining will be compared, being generated by pulse width modulation module is used for
The trigger pulse of two-way DC/DC copped waves module is controlled to realize the voltage stabilizing to DC Traction Network.
3. the accumulation energy type urban rail regenerating braking energy recovery method based on super capacitor according to claim 2, its feature
It is：It is described for each two-way DC/DC copped waves module assignment reference current value ia_refWhen, same two-way copped wave mould is detected first
Module unit（10）Under all two-way DC/DC copped waves module whether break down, if two-way DC/DC copped waves module occur therefore
Barrier, and remaining normal two-way DC/DC copped waves module disclosure satisfy that the two-way copped wave modular unit（10）Power demand, then will
The reference current value of all two-way DC/DC copped waves module for breaking down is averagely allocated to the two-way copped wave modular unit（10）Under
Remaining normal each two-way DC/DC copped waves module.
4. a kind of accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor, it is characterised in that：Including copped wave list
Unit（1）, supercapacitive cell（2）, chop control module and direct-current isolating switch unit（4）, the copped wave unit（1）Comprising two
Individual two-way copped wave modular unit（10）, the two-way copped wave modular unit（10）Grid side connection terminal opened by DC-isolation
Close unit（4）Be connected with the DC Traction Network of urban rail, capacitive side connection terminal and supercapacitive cell（2）It is connected in parallel, when straight
When stream Traction networks are DC1500V, two two-way copped wave modular units（10）It is connected in series；When DC Traction Network is DC750V,
Two two-way copped wave modular units（10）It is connected in parallel, the two-way copped wave modular unit（10）Cut including a two-way DC/DC
Ripple module or the two-way DC/DC copped waves module being connected in parallel including two or more, the outfan of the chop control module and
The control end of two-way DC/DC copped waves module is connected.
5. the accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor according to claim 4, its feature
It is：The two-way DC/DC copped waves module is the two-way chopper circuit of three level, and the two-way chopper circuit of three level includes preliminary filling
Circuit（11）, Support Capacitor C1 and a plurality of two-way DC/DC copped waves branch road in parallel, the Support Capacitor C1 and two-way DC/DC
Copped wave branch circuit parallel connection connects, and the two-way DC/DC copped waves route striding capacitance Cd and four containing parallel connected in reverse phase diode
IGBT units are constituted, and the IGBT units are small-power high-frequency I GBT unit, and four IGBT units are connected into chain, first-in-chain(FIC)
Connection end a series connection pre-charge circuit（11）The positive pole of grid side connection terminal is connected to afterwards, and the connection end e of last-of-chain is connected to simultaneously
The negative pole of grid side connection terminal and capacitive side connection terminal, in the chain between second IGBT unit and the 3rd IGBT unit
Connection end c concatenate a direct current reactor L1 after be connected to the positive pole of capacitive side connection terminal, the one of the striding capacitance Cd
End is connected in the chain connection end b between first IGBT unit and second IGBT unit, the other end and is connected in the chain
Connection end d between 3rd IGBT unit and the 4th IGBT unit.
6. the accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor according to claim 5, its feature
It is：The pre-charge circuit（11）Including main contactor KM1, charging contactor KM2 and charging resistor R1, the charge contact
It is connected in parallel with main contactor KM1 after device KM2 and charging resistor R1 are connected in series.
7. the accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor according to claim 6, its feature
It is：The two-way copped wave modular unit（10）Grid side connection terminal positive pole and negative pole between be connected in parallel to first every
From electric capacity C2, the two-way copped wave modular unit（10）Capacitive side connection terminal positive pole and negative pole between be connected in parallel to
Two isolation capacitance C3.
8. the accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor according to claim 7, its feature
It is：The two-way DC/DC copped waves module is packaged in movable pulling/inserting structure, the two-way copped wave modular unit（10）Including use
In the fixed pulling/inserting structure coordinated with movable pulling/inserting structure, the movable pulling/inserting structure is inserted in fixed pulling/inserting structure.
9. the accumulation energy type urban rail regenerative braking energy reclaiming system based on super capacitor according to claim 8, its feature
It is：The chop control module includes voltage sensor（31）, reference voltage module（32）, first comparator（33）, first
PI controllers（34）, selector（35）, reference current module（351）, current sensor（36）, the second comparator（37）, second
PI controllers（38）And PWM generator（39）, the voltage sensor（31）It is parallel to the capacitive side of two-way DC/DC copped waves module
Connection terminal, the current sensor（36）The positive pole of the grid side connection terminal of two-way DC/DC copped waves module is series at, it is described
First comparator（33）Two inputs respectively with voltage sensor（31）, reference voltage module（32）It is connected, described first
Comparator（33）Outfan and a PI controllers（34）It is connected, the selector（35）Two inputs respectively with reference
Current module（351）, a PI controllers（34）It is connected, second comparator（37）Two inputs respectively with electric current pass
Sensor（36）, selector（35）Outfan be connected, second comparator（37）Outfan pass sequentially through the 2nd PI control
Device（38）, PWM generator（39）It is connected with the control end of each IGBT unit in two-way DC/DC copped waves module.
10. the accumulation energy type urban rail regenerating braking energy based on super capacitor according to any one in claim 4～9 is returned
Receipts system, it is characterised in that：The copped wave unit（1）Also include for by two two-way copped wave modular units（10）Switch to string
The net pressure adaptation switch of connection or parallel connection（12）, the net pressure adaptation switch（12）Including the first disconnecting switch for being hilted broadsword double end
QS2 and the second disconnecting switch QS3, the armature contact of first disconnecting switch QS2 are connected to a two-way copped wave modular unit
（10）Grid side connection terminal negative pole, the armature contact of second disconnecting switch QS3 is connected to another two-way copped wave
Modular unit（10）Grid side connection terminal positive pole；One fixed contact of first disconnecting switch QS2 is connected to directly
The stream negative electrode bus of Traction networks, a fixed contact of another then with the second disconnecting switch QS3 of fixed contact are connected, and described the
Another fixed contact of two disconnecting switch QS3 is then connected to the positive electrode bus of DC Traction Network；The direct-current isolating switch list
Unit（4）Including disconnecting switch QS1 and smoothing reactor L2, the two-way copped wave modular unit（10）Grid side connection terminal lead to
Cross disconnecting switch QS1 to be connected with the DC Traction Network of urban rail, and smoothing reactor L2 is series at two-way copped wave modular unit（10）
Grid side connection terminal positive pole and disconnecting switch QS1 between.
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| CN201510186565.8A CN104802646B (en) | 2015-04-20 | 2015-04-20 | Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor |
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| CN201510186565.8A CN104802646B (en) | 2015-04-20 | 2015-04-20 | Method and system for recovering regenerative brake energy of energy storage type urban rail based on supercapacitor |
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Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Applicant after: Zhuzhou CRRC Times Equipment Technology Co., Ltd. Applicant after: GUANGZHOU METRO GROUP CO., LTD. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Applicant before: ZHUZHOU TIMES EQUIPMENT TECHNOLOGY CO., LTD. Applicant before: Guangzhou Metro Corporation |
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Effective date of registration: 20171206 Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Co-patentee after: GUANGZHOU METRO GROUP CO., LTD. Patentee after: ZHUZHOU CRRC TIMES ELECTRIC CO., LTD. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Co-patentee before: GUANGZHOU METRO GROUP CO., LTD. Patentee before: Zhuzhou Zhongche Era Equipment Technology Co., Ltd. |