CN208971375U - It is a kind of for eliminating the DC side active filter of train DC bus secondary resonance - Google Patents
It is a kind of for eliminating the DC side active filter of train DC bus secondary resonance Download PDFInfo
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- CN208971375U CN208971375U CN201821417713.8U CN201821417713U CN208971375U CN 208971375 U CN208971375 U CN 208971375U CN 201821417713 U CN201821417713 U CN 201821417713U CN 208971375 U CN208971375 U CN 208971375U
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- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model be it is a kind of for eliminating the DC side active filter of train DC bus secondary resonance, the active filter includes the two-way DC/DC converter with stepping functions, filter inductance and storage capacitor.According to power balance theory, when the secondary pulsation of busbar voltage is compensated completely, needs to control the secondary pulsating power that single-phase rectifier exports and the secondary pulsating power that active filter compensates is equal in magnitude, it is contrary.The electrical quantity such as voltage, electric current according to real system detection, carry out closed-loop control, ensure that system dynamic response capability when compensation effect and train actual motion, improve the stability of system.The shortcomings that traditional Passive LC filtering link can be substituted, can overcome passive filtering that can only compensate fixed frequency harmonic wave, it is adapted to complicated power grid environment, it is more more preferable than conventional method effect.The device of the substitution secondary resonance can reduce the volume and weight of traction drive, reduce costs and improve the power density of current transformer.
Description
Technical field
The utility model relates to rail traffic single phase power supply system more particularly to on-vehicle traction converter cross-straight-intersection systems
System.
Background technique
Single-phase invertor because the features such as its structure is simple, highly reliable, high-efficient, is not only in Locomotive Converter system,
It is also a variety of in uninterruptible power supply, grid-connected, cascade multilevel converter, polyphase ac transmission, aerospace power supply etc. simultaneously
It is widely used in power electronic system.Most of world's bullet train uses modern AC drive system at present, leads
The straight part of friendship-for drawing transmission system is rectified using the single-phase PWM of four quadrant running, and energy feedback when can be by locomotive brake is given
Power grid, while making system power factor with higher.However, monophase system can generate intrinsic secondary pulsating power, make
There is secondary low frequency pulsating in DC bus-bar voltage, endangers entire train traction system.
Traditional passive filtering directly inhibits DC voltage in DC bus both ends parallel connection bulky capacitor or LC resonance circuit
Pulsation.Since voltage ripple frequency is lower, the LC for filtering is bigger.LC resonance circuit floats parameter shift and fundamental frequency
Sensitivity is moved, when LC resonance frequency and harmonic wave source frequency severe mismatch, can be produced between DC support capacitor and LC resonance circuit
Raw second harmonic circulation, while LC resonance circuit, there are overvoltage, overcurrent phenomenon, capacitance voltage is higher than DC bus-bar voltage.
To reduce influence of the parameter shift to filter effect, simultaneously because resonant inductance power density is low, when practice of engineering design circuit,
Often choose biggish capacitance.Big capacitance, voltage levels increase capacitor cost.Therefore traditional approach reduces entire system
The reliability and power density of system, while improving cost.
Utility model content
The utility model provide it is a kind of for eliminating the active filter of train DC bus secondary resonance, to solve tradition
The inherent defect of passive LC resonance device, and then vehicle power density is improved, reduce cost.
The utility model relates to a kind of for eliminating the DC side active filter (DC- of train DC bus secondary resonance
APF) (two-way Buck/Boost converter), comprising: with stepping functions two-way DC/DC converter, filter inductance Ls and
The storage capacitor Cs of secondary pulsating power is exported for compensating prime rectifier DC side；The two-way DC/DC converter is by upper
Lower two switching tubes composition, each switching tube includes IGBT and anti-paralleled diode；
The collector of upper IGBT pipe is connect with direct current positive bus in the two-way DC/DC converter, the transmitting of upper IGBT pipe
Pole is connect with the collector of lower IGBT pipe, and the half-bridge mid point of two-way DC/DC converter (half-bridge inverter) connects filter inductance Ls's
The other end of one end, filter inductance Ls is connect with storage capacitor Cs tandem, another termination direct current negative busbar of storage capacitor Cs,
The emitter of lower IGBT pipe is connect with direct current negative busbar in two-way DC/DC converter.
It is described for eliminate the DC side active filter course of work of train DC bus secondary resonance to include: to work as prime
The secondary pulsating current of rectifier output is changed to positive maximum value by maximum negative value and (is exported with electric current from rectifier inverse to rear class
Become device load direction to be positive) when, IGBT pipe or antiparallel diode is managed with lower IGBT be on two-way DC/DC converter
State, DC side active filter work in Buck mode decompression AC chopping state, and secondary pulsating current is flowed to from rectifier
Storage capacitor Cs, DC-APF absorb secondary pulsating power, storage capacitor Cs charging, and voltage is increased with sinusoidal rule, and voltage is from most
Low spot is pulsed to highest point, ripple frequency 100Hz；When the secondary pulsating current of prime rectifier output is become by positive maximum value
When to maximum negative value, lower IGBT pipe or in the conductive state, DC side active power filtering of managing antiparallel diode with upper IGBT
Device works in Boost mode boost state, and electric current flows to rectifier from storage capacitor Cs, and DC-APF discharges secondary pulsating power,
Storage capacitor Cs electric discharge, voltage are reduced with sinusoidal rule, and voltage is pulsed from highest point to minimum point, ripple frequency 100Hz.
The utility model relates to alternatively possible implementation in, for eliminating train DC bus secondary resonance
DC side active filter (DC-APF) (two-way Buck/Boost converter), comprising: the two-way DC/DC with stepping functions
Converter, filter inductance Ls and the storage capacitor Cs that secondary pulsating power is exported for compensating prime rectifier DC side；It is described
Two-way DC/DC converter is made of upper and lower two switching tubes, and each switching tube includes IGBT and anti-paralleled diode；
The filter inductance Ls mono- terminates half-bridge (half-bridge inverter) midpoint of two-way DC/DC converter, and another termination is straight
Positive bus-bar is flowed, the emitter of upper IGBT pipe is connect with the collector of lower IGBT pipe in the two-way DC/DC converter, upper IGBT pipe
Collector connect with the one end storage capacitor Cs, the hair of lower IGBT pipe in the storage capacitor Cs other end and two-way DC/DC converter
Emitter-base bandgap grading connects direct current negative busbar.
The DC side active filter work for being used to eliminate train DC bus secondary resonance of the another kind implementation
It include: when the secondary pulsating current of prime rectifier output changes to maximum negative value by positive maximum value (with electric current as process
Export from rectifier to rear class inverter load direction and be positive), IGBT pipe or anti-simultaneously with lower IGBT pipe on two-way DC/DC converter
The diode of connection is in the conductive state, and DC side active filter works in Buck mode decompression AC chopping state, secondary arteries and veins
Streaming current flows to rectifier from storage capacitor Cs, and storage capacitor Cs electric discharge, voltage is reduced with sinusoidal rule, and voltage is from highest point arteries and veins
It moves to minimum point, ripple frequency 100Hz；When the secondary pulsating current of prime rectifier output changes to forward direction by maximum negative value
When maximum value, lower IGBT pipe or in the conductive state, the DC side active filter work with the antiparallel diode of upper IGBT pipe
In Boost mode boost state, secondary pulsating current flows to storage capacitor Cs from rectifier, storage capacitor Cs charging, voltage with
Sinusoidal rule increases, and voltage is pulsed from minimum point to highest point, ripple frequency 100Hz.
The IGBT switching device stress levels of the two-way DC/DC converter are identical as prime rectifier module, be easy to
Rectifier is integrated, convenient for the hardware design of whole device.
The method needs to install electric current, voltage sensor additional in main circuit topology according to the target of realization, according to obtaining
Instantaneous voltage or current data carry out closed-loop control to reach the target of secondary pulsating power balance.
The method for eliminating train DC bus secondary resonance using above-mentioned DC side active filter, comprising:
Step A:DC-APF compensating current control
The determination of step A1:DC-APF compensation current target value: current sense is exported using four-quadrant rectifier DC side
Device and DC bus-bar voltage sensor detect rectifier current output i respectivelygWith DC bus-bar voltage Ud, the rectification that will test
Device exports electric current igWith DC bus-bar voltage UdIt is multiplied and carries out digital bandpass filtering treatment, obtain rectifier and export secondary pulsation
Power instantaneous value Ps, PsDivided by DC-APF storage capacitor DC quantity instruction target value Ucs* DC-APF compensation current target value is obtained
is*；
The closed-loop control of the practical compensation electric current of step A2:DC-APF: DC- is detected using DC-APF compensation current sensor
The practical compensation electric current i of APFs, the practical compensation electric current i of the DC-APF that will testsLow-pass filtering treatment is carried out, then in step A1
Obtained DC-APF compensation current target value is* with the practical compensation electric current i of DC-APFsIt makes the difference to obtain the input of controller 2；
The control of step B:DC-APF storage capacitor voltage
To guarantee compensation effect, it is necessary to control storage capacitor CsVoltage DC component be maintained at steady state value, to reach APF
The target that input, output power balance.It is real using DC-APF storage capacitor voltage sensor detection DC-APF storage capacitor voltage
Border voltage DC amount Ucs, the DC-APF storage capacitor voltage virtual voltage DC quantity U that will testcsIt carries out low-pass filtering (LPF)
Processing, DC-APF storage capacitor DC quantity instruction target value Ucs* with DC-APF storage capacitor voltage virtual voltage DC quantity Ucs's
Difference is the input of controller 1；
Step C: controller 1 is added with the output of controller 2, the duty ratio d of two switching tubes is obtained, according to duty ratio
D controls two switching tube actions of two-way DC/DC converter, realizes the two-way flow of second compensation electric current, realizes and offsets rectification
The function of the secondary pulsating power of device output.
The controller 1 is PI controller, and controller 2 is ratio resonant controller.
According to power balance theory, the second pulse power of control storage capacitor Cs is equal to train cross-straight-intersection traction power supply
The secondary pulsating power of the prime rectifier output of system, opposite in phase, when controlling realization of goal, the theoretically secondary arteries and veins of DC side
Dynamic voltage completely eliminates.
The method for eliminating train DC bus secondary resonance is suitable for the implementation that both the above may relate to, i.e.,
The control method and implementation of two different DC-APF is all the same.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is simply introduced, it should be apparent that, the accompanying drawings in the following description is this reality
It without any creative labor, is gone back for those of ordinary skill in the art with novel some embodiments
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the method schematic diagram that traditional passive LC resonance mode eliminates DC bus-bar voltage pulsation；
Fig. 2 is the electrical schematics for replacing traditional passive LC resonance circuit for eliminating DC bus-bar voltage to pulse with DC-APF
One；
Fig. 3 is another replaceable topology example electrical schematics two of the utility model；
Fig. 4 is voltage, current sensor loading position schematic diagram in the utility model electrical schematics one；
Fig. 5 is voltage, current sensor loading position schematic diagram in the utility model electrical schematics two；
Fig. 6 is the practical control principle block diagram of the utility model method；
Description of symbols:
Ls: secondary resonance inductance (Fig. 1)；
Cs: secondary resonance capacitor (Fig. 1)；
Cd: DC side Support Capacitor；
1: four-quadrant rectifier DC side exports current sensor position；
2:DC-APF compensates current sensor position；
3 (3 '): DC-APF storage capacitor voltage sensor position；
4 (4 '): DC bus-bar voltage sensor position.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
The utility model provides a kind of method for eliminating train DC bus secondary resonance, be suitable for application hand over-it is straight-
The urban rail transit vehicles of the single-phase tractive power supply system of friendship formula.The utility model is carried out by the two-way DC/DC topology of buck
AC chopping realizes the two-way flow of compensation electric current.The DC-APF topology of this method application can replace traditional passive filter completely
Wave resonance device, can (for example resonance point offset be to the shadow of filter effect to avoid the inherent defect of traditional passive LC resonance device
Ring, may circulation etc. in system), while the device is with respect to conventional apparatus, it is small in size, light-weight, and then raising vehicle power is close
Degree reduces manufacturing cost.
The technical solution of the utility model is described in detail with specific embodiment below.These are specific real below
Applying example can be combined with each other, and the same or similar concept or process may be repeated no more in some embodiments.
Fig. 1 is the method schematic diagram that traditional passive LC resonance mode eliminates DC bus-bar voltage pulsation, in this approach, humorous
Vibration inductance Ls connects with resonant capacitance Cs, and entire resonance device is parallel to train DC side Support Capacitor Cd.
Fig. 2 is the electrical schematics for replacing traditional passive LC resonance circuit for eliminating DC bus-bar voltage to pulse with DC-APF,
In this approach, filter inductance Ls and storage capacitor Cs is connected in series, in another termination half-bridge inverter output of filter inductance Ls
Point, another termination DC side negative busbar of storage capacitor Cs.
In the embodiment one, when the secondary pulsating current of prime rectifier output changes to positive maximum by maximum negative value
When value (exported from rectifier to rear class inverter load direction and be positive with electric current), controls two-way DC/DC converter and work in
Buck mode, when opening upper tube S1, S1 and D2 alternate conduction, secondary pulsating current is exported from rectifier to the energy storage electricity of DC-APF
Hold Cs, DC-APF absorbs secondary pulsating power, and stage storage capacitor Cs voltage is risen with sinusoidal rule, and voltage is from minimum point arteries and veins
It moves to highest point, ripple frequency 100Hz.
When the secondary pulsating current of prime rectifier output changes to maximum negative value by positive maximum value, control two-way
DC/DC converter works in Boost mode, this stage control down tube S2 movement, when S2 is with D1 alternate conduction, secondary pulsating current
It exports from the storage capacitor Cs of DC-APF to DC side, DC-APF discharges secondary pulsating power, stage storage capacitor Cs voltage
Declined with sinusoidal rule, voltage is pulsed from highest point to minimum point, ripple frequency 100Hz.
In the embodiment one, when DC-APF is worked normally, secondary pulsating power and prime four-quadrant that DC-APF is provided
The secondary pulsating power of rectifier output is equal in magnitude, opposite in phase.
Fig. 3 is another replaceable electrical schematics, in this approach, the one end filter inductance Ls directly with direct current positive pole
Line is connected, another termination half-bridge inverter midpoint；The collector and storage capacitor of upper IGBT pipe in the two-way DC/DC converter
The one end Cs connects, and the emitter of lower IGBT pipe connects direct current negative busbar in the storage capacitor Cs other end and two-way DC/DC converter.
In the replaceable embodiment two, according to direction controlling S1 and the S2 alternate conduction of rectifier output power, control
Mode processed and embodiment one are on the contrary, when i.e. secondary pulsating current changes to positive maximum value by maximum negative value, control switch pipe S2
Movement, when electric current changes to maximum negative value by positive maximum value, control switch pipe S1 is acted, DC-APF power compensation principle and reality
It is identical to apply example one.
The utility model is eliminated in the method for train DC bus secondary resonance, needs to detect prime rectifier current output
ig, the practical compensation electric current i of DC-APFs, DC bus-bar voltage UdAnd DC-APF storage capacitor voltage virtual voltage DC quantity Ucs,
It is as shown in Figure 3, Figure 4 to detect position, wherein test point 1,2 is powered on flow sensor；Position 3 (3 '), 4 (4 ') are powered on pressure sensor.
The specific implementation process of the utility model method is divided into two parts, as shown in fig. 6, first part is DC-APF compensation
Current control.The first step is to obtain DC-APF compensation current target value, the rectifier current output i that will testgWith direct current mother
Line voltage UdIt is multiplied and carries out digital bandpass filtering (BPF) processing, obtain rectifier and export secondary pulsating power instantaneous value Ps, Ps
Divided by DC-APF storage capacitor DC quantity instruction target value Ucs* DC-APF compensation current target value i can be obtaineds*；Second step is
The closed-loop control of the practical compensation electric current of DC-APF, the practical compensation electric current i of the DC-APF that will testsLow-pass filtering treatment is carried out,
Then current target value i is compensated with obtained DC-APFs* it makes the difference to obtain the input of controller 2.
Second part is the control of DC-APF storage capacitor voltage.To guarantee compensation effect, it is necessary to control CsVoltage DC
Component is maintained at steady state value, to reach the target of APF input, output power balance.The DC-APF storage capacitor electricity that will test
It is compacted border voltage DC amount UcsCarry out low-pass filtering (LPF) processing, DC-APF storage capacitor DC quantity instruction target value Ucs* with
DC-APF storage capacitor voltage virtual voltage DC quantity UcsDifference be controller 1 input.
Finally, controller 1 is added with the output of controller 2, the duty ratio d of switch S1 and S2 are obtained.It may be noted that
It is, if the detection practical compensation electric current i of DC-APFsCurrent sensor direction as shown in fig. 6, so when duty ratio d be timing,
It needs to control S2 movement, when d is negative, needs to control S1 movement, if sensor orientation and diagram are on the contrary, so switch is dynamic herein
Make mode with it is aforementioned opposite.
The controller 1 is PI controller, and controller 2 is ratio resonant controller.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (4)
1. a kind of for eliminating the DC side active filter of train DC bus secondary resonance, it is characterised in that: include: to have
The two-way DC/DC converter of stepping functions, filter inductance Ls and exports secondary pulsation for compensating prime rectifier DC side
The storage capacitor Cs of power；The two-way DC/DC converter is made of upper and lower two switching tubes, each switching tube include IGBT and
Anti-paralleled diode；
The collector of upper IGBT pipe is connect with direct current positive bus in the two-way DC/DC converter, the emitter of upper IGBT pipe and
The collector of lower IGBT pipe connects, and the half-bridge mid point of two-way DC/DC converter connects one end of filter inductance Ls, filter inductance Ls's
The other end is connect with storage capacitor Cs tandem, another termination direct current negative busbar of storage capacitor Cs, in two-way DC/DC converter
The emitter of lower IGBT pipe is connect with direct current negative busbar.
2. as described in claim 1 for eliminating the DC side active filter of train DC bus secondary resonance, feature
Be: the IGBT switching device stress levels of the two-way DC/DC converter are identical as prime rectifier module, are easy to and rectify
Device is integrated.
3. a kind of for eliminating the DC side active filter of train DC bus secondary resonance, it is characterised in that: include: to have
The two-way DC/DC converter of stepping functions, filter inductance Ls and exports secondary pulsation for compensating prime rectifier DC side
The storage capacitor Cs of power；The two-way DC/DC converter is made of upper and lower two switching tubes, each switching tube include IGBT and
Anti-paralleled diode；
The filter inductance Ls mono- terminates the half-bridge mid point of two-way DC/DC converter, and another termination direct current positive bus is described two-way
The emitter of upper IGBT pipe is connect with the collector of lower IGBT pipe in DC/DC converter, the collector of upper IGBT pipe and energy storage electricity
Hold the connection of the one end Cs, the emitter of lower IGBT pipe meets the negative mother of direct current in the storage capacitor Cs other end and two-way DC/DC converter
Line.
4. as claimed in claim 3 for eliminating the DC side active filter of train DC bus secondary resonance, feature
Be: the IGBT switching device stress levels of the two-way DC/DC converter are identical as prime rectifier module, are easy to and rectify
Device is integrated.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821417713.8U CN208971375U (en) | 2018-08-31 | 2018-08-31 | It is a kind of for eliminating the DC side active filter of train DC bus secondary resonance |
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| CN201821417713.8U CN208971375U (en) | 2018-08-31 | 2018-08-31 | It is a kind of for eliminating the DC side active filter of train DC bus secondary resonance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067154A (en) * | 2018-08-31 | 2018-12-21 | 北京交通大学 | A kind of active filter and the method for eliminating train DC bus secondary resonance |
| CN110572017A (en) * | 2019-09-16 | 2019-12-13 | 湖南大学 | Single-phase inverter direct-current broadband domain ripple suppression device and control method thereof |
| CN113098421A (en) * | 2021-04-01 | 2021-07-09 | 中国矿业大学 | Method for suppressing low-frequency ripple of direct-current side voltage of parallel active power filter |
| CN113114033A (en) * | 2021-05-18 | 2021-07-13 | 西南交通大学 | Direct-current-side secondary ripple suppression device for traction transmission system and control method |
-
2018
- 2018-08-31 CN CN201821417713.8U patent/CN208971375U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067154A (en) * | 2018-08-31 | 2018-12-21 | 北京交通大学 | A kind of active filter and the method for eliminating train DC bus secondary resonance |
| CN110572017A (en) * | 2019-09-16 | 2019-12-13 | 湖南大学 | Single-phase inverter direct-current broadband domain ripple suppression device and control method thereof |
| CN110572017B (en) * | 2019-09-16 | 2021-07-02 | 湖南大学 | Single-phase inverter direct-current broadband domain ripple suppression device and control method thereof |
| CN113098421A (en) * | 2021-04-01 | 2021-07-09 | 中国矿业大学 | Method for suppressing low-frequency ripple of direct-current side voltage of parallel active power filter |
| CN113114033A (en) * | 2021-05-18 | 2021-07-13 | 西南交通大学 | Direct-current-side secondary ripple suppression device for traction transmission system and control method |
| CN113114033B (en) * | 2021-05-18 | 2022-11-29 | 西南交通大学 | Direct-current-side secondary ripple suppression device for traction transmission system and control method |
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