CN106230295A - A kind of bullet train no industrial frequency transformer auxiliary converter system - Google Patents
A kind of bullet train no industrial frequency transformer auxiliary converter system Download PDFInfo
- Publication number
- CN106230295A CN106230295A CN201610603071.XA CN201610603071A CN106230295A CN 106230295 A CN106230295 A CN 106230295A CN 201610603071 A CN201610603071 A CN 201610603071A CN 106230295 A CN106230295 A CN 106230295A
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- CN
- China
- Prior art keywords
- pressure side
- brachium pontis
- low
- side brachium
- converter
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a kind of bullet train no industrial frequency transformer auxiliary converter system, belong to bullet train power supply technique field.The low-pressure side brachium pontis of DC DC changer is connected with three-phase inverter；The high-pressure side brachium pontis of DC DC changer uses diode clamping tri-level half-bridge structure, and the brachium pontis of low-pressure side uses diode clamping tri-level half-bridge or two level half-bridge structures；The low-pressure side brachium pontis parallel connection secondary ripple wave filter of DC DC changer；The high-pressure side brachium pontis of DC DC changer is connected with medium/high frequency transformer (MFT) former limit T1 and secondary T2 respectively with low-pressure side brachium pontis；Three-phase inverter uses two level block；Control circuit gathers low-pressure side brachium pontis output voltage V respectively2, three-phase inverter output port voltage va、vb、vcIt is controlled.This system is mainly used in bullet train auxiliary equipment and powers.
Description
Technical field
The invention belongs to bullet train power supply technique field, particularly to bullet train auxiliary equipment power supply technique.
Background technology
EMU technology is the aggregation of every complex technology, and auxiliary converter system is the important of EMU
One of ingredient.In order to ensure that EMU is the most properly functioning, train needs stable, efficient auxiliary converter system
Uniting and provide power supply for numerous auxiliary equipments, these equipment include air compressor, cooling fan, oil pump/pump motor, air
Regulation system, heating, illumination, passenger information system etc..Can the quality of auxiliary converter system is directly connected to EMU
Normal traveling.
At present, the ac power supply system of EMU mainly has two kinds of forms: hand over orthogonal type and orthogonal type.Hand over orthogonal type
Auxiliary converter system structure, uses at present on CRH2 EMUs, and this form cost is relatively low, but may be only available for auxiliary
Help the tractive transformer of winding, and undue phase time auxiliary converter system cannot normally power taking, be in off-position, auxiliary set
Standby operation and life-span have a strong impact on.
Orthogonal type supplementary AC electric power system structure, current CRH1, CRH3 and CRH5 all use the auxiliary of this class formation
Converter system.Compared with handing over orthogonal type, the advantage of orthogonal type is to eliminate the auxiliary winding of tractive transformer, simplifies traction
The design of transformator and manufacture work, and traction motor can be used to generate electricity crossing phase-separating section when, maintain and draw back
The voltage of road DC side, thus ensure auxiliary converter system not power-off.Orthogonal type auxiliary converter system has two class formations, wherein,
The auxiliary converter system of CRH1 and CRH3, after DC voltage inversion, exports three-phase voltage after Industrial Frequency Transformer blood pressure lowering；CRH5
Utilize two isolation type DC-DC converter cascades, after DC voltage blood pressure lowering, export three-phase voltage through three-phase inverter.With
The structure of CRH1 with CRH3 is compared, and CRH5 eliminates heaviness, bulky Industrial Frequency Transformer, effectively reduces the deadweight of train,
Reduce the energy consumption of train driving to a certain extent.But the DC-DC reduction voltage circuit that existing CRH5 uses uses device more, causes
Circuit structure is more complicated.
Summary of the invention
It is an object of the invention to provide a kind of bullet train no industrial frequency transformer auxiliary converter system, it can efficiently solve
Mobile unit lightweight, circuit structure is simple, increase the problem that compartment utilizes space.
The present invention solves its technical problem, and the technical scheme used is:
A kind of bullet train no industrial frequency transformer auxiliary converter system, including DC-DC converter, secondary ripple wave filtering dress
Put, three-phase inverter and control circuit, the low-pressure side brachium pontis of DC-DC converter is connected with three-phase inverter；DC-DC converter
High-pressure side brachium pontis uses diode clamping tri-level half-bridge structure, the brachium pontis of low-pressure side use diode clamping tri-level half-bridge or
Two level half-bridge structures；Three-phase inverter uses two level block；The low-pressure side brachium pontis parallel connection secondary ripple wave filter of DC-DC converter
Wave apparatus；The high-pressure side brachium pontis of DC-DC converter and low-pressure side brachium pontis respectively with medium/high frequency transformer (MFT) former limit T1 and secondary
T2 is connected；Control circuit gathers low-pressure side brachium pontis output voltage V respectively2, three-phase inverter output port voltage va、vb、vcCarry out
Control.
High-pressure side brachium pontis and the low-pressure side brachium pontis of described DC-DC converter all use half-bridge structure.
The low-pressure side parallel connection secondary ripple wave filter of described DC-DC converter.
Owing to DC-DC converter low-pressure side output end voltage is relatively low, low-pressure side brachium pontis uses two level half-bridge structures permissible
Meet switching device requirement, circuit is more simplified；And low-pressure side brachium pontis uses tri-level half-bridge structure, it is possible to achieve low-pressure side
The Sofe Switch of switching device, reduces switching loss, more energy-conservation；
The operation principle of AuCT of the present invention is:
1, this DC-DC converter is half-bridge structure, according to the structure of DC-DC converter low-pressure side brachium pontis, and its operation principle
It is divided into following two:
A, low-pressure side brachium pontis use diode clamping tri-level half-bridge structure
The output voltage U of the high-pressure side brachium pontis of three-level DC-DC converter1+ V can be exported1/ 2, V1/ 2,0, the most just,
Negative, 03 level.Work as S11And S12Conducting, U1For positive level；Work as S12And D1Or S13And D2Conducting, U1For zero level；Work as S13With
S14Conducting, U1For negative level.The output voltage U of low-pressure side brachium pontis2+ V can be exported2/ 2, V2/ 2,0, the most positive and negative, 03 electricity
Flat.Work as S21And S22Conducting, U2For positive level, work as S22And D3Or S23And D4Conducting, U2For zero level, work as S23And S24Conducting, U2For
Negative level.U1Positive and negative level identical for action time in a switch periods, the ratio of action time and half switch periods
For D1。U2Positive and negative level identical for action time in a switch periods, action time, the ratio with half switch periods was
D2.Circuit transmission power is by D1、D2WithImpact, whereinFor U1With U2Between time corresponding to phase shifting angle and switch periods
Ratio.Not only affect the size of through-put power,The positive and negative direction also determining through-put power.
Make k=nV2/V1, wherein n is transformer voltage ratio, has a situations below:
WhenScope when [-0.5, (1-k)/2],
WhenScope existTime,
WhenScope existTime, D1=1, D2=1.
So that DC-DC converter output end voltage V2Stablizing controlled, control circuit gathers low-pressure side DC voltage V2,
By itself and reference voltage V2refDo after the recovery and obtain voltage error signal Δ V2, obtain via PI controllerIt is inputted switch
Signal generator module, according toIt is calculated D1And D2Size, and produce correspondence switching signal to control DC-DC converter
Work.
Low-pressure side brachium pontis uses two level half-bridge structures
The output voltage U of DC-DC converter high-pressure side brachium pontis1Positive and negative, 03 level can be exported.Work as S11And S12Lead
Logical, U1For positive level；Work as S12And D1Or S13And D2Conducting, U1For zero level；Work as S13And S14Conducting, U1For negative level.U1Just,
Negative level is identical for the action time in a switch periods, and action time, the ratio with half switch periods was D1.Low-pressure side bridge
The output voltage U of arm2Only export positive and negative two level, U2Positive and negative level identical for action time in a switch periods.
Circuit transmission power is by D1WithImpact, whereinFor U1With U2Between time corresponding to phase shifting angle and the ratio of switch periods
Value.Not only affect the size of through-put power,The positive and negative direction also determining through-put power.
Make k=nV2/V1, wherein n is transformer voltage ratio, has a situations below:
WhenScope existTime,
WhenScope existTime,
WhenScope existTime, D1=1.
So that DC-DC converter output end voltage V2Stablizing controlled, control circuit gathers low-pressure side DC voltage V2,
By itself and reference voltage V2refDo after the recovery and obtain voltage error signal Δ V2, obtain via PI controllerIt is inputted switch letter
Number generation module, according toIt is calculated D1Size, and produce correspondence switching signal with control DC-DC converter work.
2, three-phase inverting circuit is two level block, uses SPWM modulator approach, and output amplitude stablizes controlled three-phase work
Frequently alternating voltage.Control circuit gathers inverter circuit outfan three-phase phase voltage va、vb、vc, after asking for its virtual value, by it
Mean effective value and reference voltage virtual value are done difference and are obtained voltage error signal Δ V, obtain initial modulation degree via PI controller
m1。
For threephase load uneven situation that may be present, by inverter circuit outfan three-phase phase voltage va、vb、vc's
Virtual value is done difference respectively and is obtained 3 road voltage error signals with reference voltage virtual value, obtains each phase via PI controller respectively
Corresponding modulation degree compensation dosage m2i(i=a, b, c), by m1With m2iIt is added modulation degree m obtaining each phasei(i=a, b, c).With
After, the switching signal of three-phase inverter is obtained via SPWM modulation module.
Present invention advantage compared with prior art and effect:
The present invention, on the basis of CRH5 auxiliary converter system, designs a kind of improved system structure.This system and CRH5
Auxiliary converter system is compared, and can realize the Sofe Switch of device in DC decompression link, reduces contactor energy consumption, circuit structure
More simplify, the numbers of elements such as power electronic devices can be reduced further, alleviate system bulk, weight, be substantially reduced cost,
And it is more environmentally-friendly energy-conservation.
Accompanying drawing explanation
Fig. 1 is present invention annexation structure chart in CRH5 tractive power supply system
Fig. 2 is the auxiliary converter system topological diagram that low-pressure side brachium pontis 1b of the present invention uses tri-level half-bridge structure
Fig. 3 is the auxiliary converter system topological diagram that low-pressure side brachium pontis 1b of the present invention uses two level half-bridge structures
Detailed description of the invention
The detailed description of the invention of the present invention is: a kind of bullet train no industrial frequency transformer auxiliary converter system, including DC-DC
Changer 1, secondary ripple wave filter 2, three-phase inverter 3 and control circuit 4, wherein:
A, DC-DC converter low-pressure side brachium pontis 1b are connected with three-phase inverter 3；
B, the high-pressure side brachium pontis 1a of DC-DC converter 1 use diode clamping tri-level half-bridge structure, low-pressure side brachium pontis 1b
Use diode clamping tri-level half-bridge or two level half-bridge structures；Three-phase inverter 3 uses two level block；
C, DC-DC converter low-pressure side brachium pontis 1b parallel connection secondary ripple wave filter 2；DC-DC high-pressure side brachium pontis 1a and low
Pressure side brachium pontis 1b is connected with medium/high frequency transformer (MFT) former limit T1 and secondary T2 respectively；
D, control circuit 4 gather low-pressure side brachium pontis 1b output voltage V respectively2, three-phase inverter 3 output port voltage va、
vb、vcIt is controlled.
Claims (2)
1. a bullet train no industrial frequency transformer auxiliary converter system, including DC-DC converter (1), secondary ripple wave filtering dress
Put (2), three-phase inverter (3) and control circuit (4), it is characterised in that: the low-pressure side brachium pontis (1b) of DC-DC converter (1) with
Three-phase inverter (3) is connected；The high-pressure side brachium pontis (1a) of DC-DC converter (1) uses diode clamping tri-level half-bridge structure,
The brachium pontis (1b) of low-pressure side uses diode clamping tri-level half-bridge or two level half-bridge structures；Three-phase inverter (3) uses two
Level block；The low-pressure side brachium pontis (1b) of DC-DC converter (1) secondary ripple wave filter (2) in parallel；DC-DC converter (1)
High-pressure side brachium pontis (1a) be connected with medium/high frequency transformer (MFT) former limit T1 and secondary T2 respectively with low-pressure side brachium pontis (1b)；Control
Circuit processed gathers low-pressure side brachium pontis (1b) output voltage V respectively2, three-phase inverter output port voltage va、vb、vcIt is controlled.
A kind of bullet train no industrial frequency transformer auxiliary converter system, it is characterised in that: described
High-pressure side brachium pontis (1a) and the low-pressure side brachium pontis (1b) of DC-DC converter (1) all use half-bridge structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603071.XA CN106230295A (en) | 2016-07-27 | 2016-07-27 | A kind of bullet train no industrial frequency transformer auxiliary converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610603071.XA CN106230295A (en) | 2016-07-27 | 2016-07-27 | A kind of bullet train no industrial frequency transformer auxiliary converter system |
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| Publication Number | Publication Date |
|---|---|
| CN106230295A true CN106230295A (en) | 2016-12-14 |
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| CN201610603071.XA Pending CN106230295A (en) | 2016-07-27 | 2016-07-27 | A kind of bullet train no industrial frequency transformer auxiliary converter system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460278A (en) * | 2019-08-08 | 2019-11-15 | 华中科技大学 | A kind of motor control method being tethered at unmanned plane and storage medium and control system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013248U (en) * | 2014-07-16 | 2014-12-10 | 中国矿业大学 | A kind of electric power electric transformer based on LLC controlled resonant converter |
| CN105226957A (en) * | 2015-10-08 | 2016-01-06 | 西南交通大学 | A kind of three-phase-single-phase potential device of no industrial frequency transformer |
-
2016
- 2016-07-27 CN CN201610603071.XA patent/CN106230295A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204013248U (en) * | 2014-07-16 | 2014-12-10 | 中国矿业大学 | A kind of electric power electric transformer based on LLC controlled resonant converter |
| CN105226957A (en) * | 2015-10-08 | 2016-01-06 | 西南交通大学 | A kind of three-phase-single-phase potential device of no industrial frequency transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110460278A (en) * | 2019-08-08 | 2019-11-15 | 华中科技大学 | A kind of motor control method being tethered at unmanned plane and storage medium and control system |
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Application publication date: 20161214 |