CN207251209U - A kind of electric power electric transformer - Google Patents
A kind of electric power electric transformer Download PDFInfo
- Publication number
- CN207251209U CN207251209U CN201720723330.2U CN201720723330U CN207251209U CN 207251209 U CN207251209 U CN 207251209U CN 201720723330 U CN201720723330 U CN 201720723330U CN 207251209 U CN207251209 U CN 207251209U
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- CN
- China
- Prior art keywords
- electric power
- power electronic
- electronic transformer
- transformer
- monophase electric
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model provides a kind of electric power electric transformer, is related to electric railway traction power supply technique field.It can solve the problems, such as Dynamic control negative-sequence current and compensating reactive power and Traction networks electricity split-phase.The two-phase Monophase electric power electronic transformer for the input cascade structure to be formed that connects is cascaded using n converter module；It is used cooperatively with Scott transformers, α phase output terminals A1P ' is connected by connection reactance LA with the positive input terminal A1P of Monophase electric power electronic transformer A, β phase output terminals B1P ' is connected by connection reactance LB with the positive input terminal B1P of Monophase electric power electronic transformer B, and the negative input end BnN of the negative input end AnN and transformer B of transformer A are connected；When using output for parallel-connection structure, the positive output end b1P of the positive output end a1P and transformer B of transformer A are connected, and the negative output terminal bnN of the negative output terminal anN and transformer B of transformer A are connected；The negative output terminal anN of Monophase electric power electronic transformer A is connected with rail, and the positive output end b1P of transformer B is connected through reactance with contact net.
Description
Technical field
It the utility model is related to electric railway traction power supply technique field.
Background technology
At present, China is there are the tractive power supply system in substantial amounts of single-phase load, especially China, and electric railway is using single
Phase industrial frequency AC system, tractive power supply system are connected by traction substation with electric system, the core equipment of traction substation
It is tractive transformer.In recent years, the tractive transformer of the Vv wiring of direct-furnish mode, the traction voltage transformation of the Vx wiring of AT modes
Device, Ynvd tractive transformers, Scott (Scott) tractive transformer etc. realize the phase inversion of three-phase-two, but China is drawn
All there are two main problems for electric power system：Electric split-phase problem, negative phase-sequence problem.Electric split-phase problem causes supply line in the presence of no electricity
Area, the presence of non-Electric region seriously affect the overall performance of tractive power supply system；Traction load is single-phase load, have it is serious not
Symmetry, therefore a large amount of negative-sequence currents are injected to electric system, cause the serious imbalance of three phase network.And when locomotive is urgent
During braking, the energy of generation can not return to power grid, only by the unnecessary energy of resistance consumption, be unfavorable for energy saving.
In view of the deficiencies in the prior art, to solve the above-mentioned problems, it is proposed that a kind of traction using traction substation becomes
Two single-phase electricities that transformer exports, are transformed into the converters of a single-phase electricity, which can be real by depressor
Existing negative phase-sequence and the compensation of idle dynamic；The harmonic wave of single-phase load can be administered, improves the power quality of power grid；Cancel existing traction
Mistake split-phase in electric power system, contributes to high speed, the development of heavy haul railway；It can realize energy feedback etc..
Utility model content
The purpose of this utility model is to provide a kind of electric power electric transformer, it can efficiently solve Dynamic control negative phase-sequence electricity
The problem of stream and compensating reactive power and Traction networks electricity split-phase.
The purpose of this utility model is achieved through the following technical solutions：In the base of traction substation internal transformer
On plinth, make improvements, by Technics of Power Electronic Conversion device, two single-phase electricities are changed into a single-phase electricity and are used for Traction networks.
The device eliminated split-phase, and when traction locomotive is in regenerative braking, electric energy up to standard can be fed back to power grid, is realized
The two-way flow of energy.For the device using the cascade input of more level, the single-phase alternating current of two-phase output can be in series or in parallel.
To sum up, which not only improves the development of China railways cause, and is conducive to environment, saves electric energy.
The utility model solves its technical problem, and used technical solution is：
A kind of electric power electric transformer, including tractive transformer, Monophase electric power electronic transformer A and Monophase electric power electronics become
Depressor B, is used cooperatively with the tractive transformer in traction substation, the two-phase electricity that tractive transformer exports is transformed to single-phase
Electricity, Monophase electric power electronic transformer A and Monophase electric power electronic transformer B are to connect to being formed using n converter module cascade
Input cascade structure two-phase-Monophase electric power electronic transformer；When the tractive transformer used in traction substation is this section
During special transformer, α, β two single-phase electricities of phase are exported, two-phase-Monophase electric power electronic transformer is used cooperatively with Scott Transformer,
α phase output terminals A1P ' is by connection reactance LA and the Monophase electric power electronic transformer A in two-phase-Monophase electric power electronic transformer
Positive input terminal A1P be connected, β phase output terminals B1P ' by connection reactance LB and Monophase electric power electronic transformer B positive input terminal
B1P is connected, the negative input end BnN phases of the negative input end AnN and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Even；When using output for parallel-connection structure, positive output end a1P and the Monophase electric power electronic transformer of Monophase electric power electronic transformer A
The positive output end b1P of device B is connected, the negative output terminal anN's and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Negative output terminal bnN is connected；When use output for cascaded structure when, the positive output end a1P of Monophase electric power electronic transformer A with it is single-phase
The be connected negative output terminal anN of Monophase electric power electronic transformer A of the negative output terminal bnN of electric power electric transformer B are connected with rail N,
The positive input terminal b1P of Monophase electric power electronic transformer B is connected through connecting reactance L with contact net P；When what is used in traction substation
When being Vv wiring transformers, T1, T2 two single-phase electricities of phase, two-phase-Monophase electric power electronic transformer and Vv wiring transformers are exported
It is used cooperatively, the negative input end AnN phases of the negative input end BnN and Monophase electric power electronic transformer A of Monophase electric power electronic transformer B
Even, the output terminal B1P ' of T2 phases is connected by reactance LB with the positive input terminal B1P of Monophase electric power electronic transformer B, T1 phases it is defeated
Outlet A1P ' is connected by reactance LA with the positive input terminal A1P of Monophase electric power electronic transformer A, Monophase electric power electronic transformer A
Negative output terminal anN be connected on rail N, the positive output end b1P of Monophase electric power electronic transformer B is through reactance L and contact net P
It is connected；When using Parallel opertation, the positive output end a1P's and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Positive output end b1P is connected, the negative output of the negative output terminal anN and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
End bnN is connected；When using series connection output, positive output end a1P and the Monophase electric power electronic transformer of Monophase electric power electronic transformer A
The negative output terminal bnN of device B is connected.
The converter module cascades the mode to connect：Monophase electric power electronic transformer A and Monophase electric power electronic transformer
The left end input wires mode of device B, wherein, the positive input terminal A1P of converter module 1 is picked out, negative input end A1N and converter mould
The positive input terminal A2P of block 2 is connected, and so on, negative input end A (n-1) N's and converter module n of converter module n-1
Positive input terminal AnP connects, and negative input end AnN is picked out, and n converter module input terminal is connected；Converter module 1 is just
Output terminal a1P is picked out, negative output terminal a1N connects with the positive output end a2N in converter module 2, same and so on；Single-phase electricity
N converter module is also adopted in power electronic transformer B connects in a like fashion, n>1.
The particular number of the converter module number n to specifically use switching tube, take topological structure related, when
Higher using the stress levels of switching tube, the size of n is just smaller accordingly；When taking more level topological structures, n also accordingly compared with
It is small, conversely, converter module number is more.
Compared with prior art, the utility model beneficial effect is：
1st, the utility model is two α (T1), β exporting tractive transformer on the basis of existing traction substation
(T2) single-phase electricity changes into the power electronic equipment of a single-phase electricity, and without transforming traction substation, applicability, economy are high.
2nd, the use of the utility model, it is possible to achieve cophase supply and the electric split-phase for cancelling Traction networks, can solve negative phase-sequence
Compensated with idle dynamic, administer the harmonic wave of single-phase load, realize energy feedback, so as to improve the power quality of power grid.
3rd, serial or parallel connection exports single-phase-single-phase invertor cascade per phase again, improves output voltage grade.
4th, voltage-phase, frequency and amplitude that inverter exports can be adjusted according to the information of voltage of supply network, is allowed to
Meet that user requires, improve power quality, realize the two-way flow of energy.
Brief description of the drawings
Fig. 1 is that the utility model is used for Scott Transformer tandem type structure chart；
Fig. 2 is that the utility model is used for Scott Transformer parallel connection type structure chart；
Fig. 3 is that the utility model is used for Vv wiring transformer tandem type structure charts；
Fig. 4 is that the utility model is used for Vv wiring transformer parallel connection type structure charts；
Fig. 5 is the utility model tandem type structure chart；
Fig. 6 is the utility model parallel connection type structure chart.
Embodiment
Fig. 1, shown in 2 be that the utility model is connected with the output that Scott tractive transformers are used cooperatively, outside output-parallel
Portion's mode of connection.What Fig. 3,4 represented is the situation that the utility model is used cooperatively with Vv wiring transformers.Divide shown in Fig. 5, Fig. 6
Wei not the output-parallel of the utility model, the internal embodiment of output series connection：A kind of two-phase-Monophase electric power electronic transformer
Device, including tractive transformer, Monophase electric power electronic transformer A and Monophase electric power electronic transformer B.Suitable for traction substation
Two-phase-Monophase electric power electronic transformer, on the basis of existing electric substation, each phase (A, B, C) of three phase network becomes through traction
Depressor output α (T1), β (T2) two-phase, then cascade n (n>1) a converter module (A1~An, B1~Bn) picks out, and forms input
The converting means of cascade structure.Output has series connection and two kinds of structures in parallel.Wherein：
A, when the tractive transformer used in traction substation is Scott (Scott) transformer, output α, β phase two
Single-phase electricity, two-phase-Monophase electric power electronic transformer coordinates with Scott (Scott) transformer in use, α phase output terminals A1P ' is passed through
Cross the positive input terminal A1P phases of connection reactance LA and the Monophase electric power electronic transformer A in two-phase-Monophase electric power electronic transformer
Even, β phase output terminals B1P ' is connected by connection reactance LB with the positive input terminal B1P of Monophase electric power electronic transformer B, Monophase electric power
The negative input end AnN of electronic transformer A is connected with the negative input end BnN of Monophase electric power electronic transformer B；Exported when using as simultaneously
When being coupled structure, the positive output end b1P phases of the positive output end a1P and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Even, the negative output terminal anN of Monophase electric power electronic transformer A is connected with the negative output terminal bnN of Monophase electric power electronic transformer B；When
During using cascaded structure, the negative output of the positive output end a1P and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
End bnN is connected, and the negative output terminal anN of Monophase electric power electronic transformer A is connected with rail N, and Monophase electric power electronic transformer B is just
Output terminal b1P is connected through connecting reactance L with contact net P；When in traction substation using Vv wiring transformers, two-phase-
Monophase electric power electronic transformer is used cooperatively with Vv wiring transformers, and BnN is connected with AnN, and the output terminal B1P ' of T2 phases passes through electricity
Anti- LB is connected with the positive input terminal B1P in Monophase electric power electronic transformer B, the output terminals A 1P ' of T1 phases by reactance LA with it is single-phase
The positive input terminal A1P of electric power electric transformer A is connected.The negative output terminal anN of Monophase electric power electronic transformer A is connected to rail N
On, the positive output end b1P of Monophase electric power electronic transformer B is connected through reactance L with contact net P；It is single when using Parallel opertation
The positive output end a1P of phase electric power electric transformer A is connected with the positive output end b1P of Monophase electric power electronic transformer B, Monophase electric power
The negative output terminal anN of electronic transformer A is connected with the negative output terminal bnN of Monophase electric power electronic transformer B.
B, the left end input wires of the Monophase electric power electronic transformer A of the utility model and Monophase electric power electronic transformer B
Mode, the positive input terminal A1P of converter module 1 therein is picked out, negative input end A1N and the positive input terminal in converter module 2
A2P is connected, and so on, the positive input terminal AnP phases of negative input end A (n-1) the N and converter module n of converter module n-1
Even, negative input end AnN is picked out；The positive output end a1P of converter module 1 is picked out, in negative output terminal a1N and converter module 2
Positive output end a2N connects, same and so on, negative output terminal a (n-1) N and converter module n of converter module n-1 are just
Output terminal anP is connected, and negative output terminal anN is picked out.Similarly, n converter module also uses phase in Monophase electric power electronic transformer B
Same mode connects, n>1.Depending on switching tube stress levels and topological structure that the specific several evidences of converter module specifically use.
The utility model proposes with a kind of matching used electric power electric transformer of tractive transformer, the two-phase-single-phase
Monophase electric power electronic transformer A and Monophase electric power electronic transformer B in electric power electric transformer use n converter module level
Connection, its converter are mainly made of rectification circuit, bidirectional DC-DC converter circuit and inverter circuit.From modulation level angle, circuit
Can be two, three-level structure or more level blocks, from bridge arrangement angle, circuit can be full-bridge, half-bridge knot
Structure, in addition can also have resonant network or resonance free network in bidirectional DC-DC converter circuit.Structure can bear high pressure,
Output has serial or parallel connection two ways, is directly connected with single-phase Traction networks, improves output voltage grade.The utility model exists
On the basis of existing traction substation, without transforming traction substation with regard to the mistake split-phases of Traction networks can be eliminated, same phase is realized
Power supply, can dynamically compensate negative phase-sequence and harmonic wave that is idle, administering single-phase load, realize energy feedback, so as to improve the electricity of power grid
Can quality.And voltage-phase, frequency and amplitude that inverter exports can be adjusted according to the information of voltage of supply network, is allowed to
Meet that user requires, improve power quality, realize the two-way flow of energy.
Claims (2)
1. a kind of electric power electric transformer, including tractive transformer, Monophase electric power electronic transformer A and Monophase electric power electronic transformer
Device B, it is characterised in that：Monophase electric power electronic transformer A and Monophase electric power electronic transformer B is n converter module cascade
Connect the two-phase-Monophase electric power electronic transformer for inputting cascade structure to be formed；When the traction voltage transformation used in traction substation
When device is Scott Transformer, α, β two single-phase electricities of phase, two-phase-Monophase electric power electronic transformer and Scott Transformer are exported
Coordinate, α phase output terminals A1P ' is by connection reactance LA and the Monophase electric power electronic transformer in two-phase-Monophase electric power electronic transformer
The positive input terminal A1P of device A is connected, and β phase output terminals B1P ' passes through the positive input of connection reactance LB and Monophase electric power electronic transformer B
End B1P is connected, the negative input end BnN of the negative input end AnN and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
It is connected；When using output for parallel-connection structure, positive output end a1P and the Monophase electric power electronics of Monophase electric power electronic transformer A become
The positive output end b1P of depressor B is connected, the negative output terminal anN and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Negative output terminal bnN be connected；When using output for cascaded structure, the positive output end a1P and list of Monophase electric power electronic transformer A
The negative output terminal bnN of phase electric power electric transformer B is connected, negative output terminal anN and the rail N phases of Monophase electric power electronic transformer A
Even, the positive output end b1P of Monophase electric power electronic transformer B is connected through connecting reactance L with contact net P；When being adopted in traction substation
When being Vv wiring transformers, T1, T2 two single-phase electricities of phase are exported, two-phase-Monophase electric power electronic transformer becomes with Vv wiring
Depressor is used cooperatively, the negative input end of the negative input end BnN and Monophase electric power electronic transformer A of Monophase electric power electronic transformer B
AnN is connected, and the output terminal B1P ' of T2 phases is connected by reactance LB with the positive input terminal B1P of Monophase electric power electronic transformer B, T1 phases
Output terminals A 1P ' be connected by reactance LA with the positive input terminal A1P of Monophase electric power electronic transformer A, Monophase electric power electronic transformer
The negative output terminal anN of device A is connected on rail N, and the positive output end b1P of Monophase electric power electronic transformer B is through reactance L and contact net
P is connected；When using Parallel opertation, the positive output end a1P and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A
Positive output end b1P be connected, the negative output terminal anN's and Monophase electric power electronic transformer B of Monophase electric power electronic transformer A is negative defeated
Outlet bnN is connected；When using series connection output, positive output end a1P and the Monophase electric power electronics of Monophase electric power electronic transformer A become
The negative output terminal bnN of depressor B is connected.
A kind of 2. electric power electric transformer according to claim 1, it is characterised in that：The converter module cascade connects
Mode be：The left end input wires mode of Monophase electric power electronic transformer A and Monophase electric power electronic transformer B, wherein, conversion
The positive input terminal A1P of device module 1 is picked out, negative input end A1N is connected with the positive input terminal A2P in converter module 2, successively class
Push away, negative input end A (n-1) N in converter module n-1 connect with the positive input terminal AnP of converter module n, negative input end AnN
Pick out, n converter module input terminal is connected；The positive output end a1P of converter module 1 is picked out, negative output terminal a1N with
Positive output end a2N in converter module 2 connects；N converter module is also using identical in Monophase electric power electronic transformer B
Mode connects, n>1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723330.2U CN207251209U (en) | 2017-06-21 | 2017-06-21 | A kind of electric power electric transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720723330.2U CN207251209U (en) | 2017-06-21 | 2017-06-21 | A kind of electric power electric transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207251209U true CN207251209U (en) | 2018-04-17 |
Family
ID=61877185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720723330.2U Expired - Fee Related CN207251209U (en) | 2017-06-21 | 2017-06-21 | A kind of electric power electric transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207251209U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104443A (en) * | 2017-06-21 | 2017-08-29 | 西南交通大学 | A kind of electric power electric transformer |
| CN109600051A (en) * | 2018-12-06 | 2019-04-09 | 中国科学院电工研究所 | The through cophase supply device of non-full capacity and its control method |
| CN112332683A (en) * | 2020-11-10 | 2021-02-05 | 青岛鼎信通讯股份有限公司 | Power electronic transformer based on square wave converter |
-
2017
- 2017-06-21 CN CN201720723330.2U patent/CN207251209U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107104443A (en) * | 2017-06-21 | 2017-08-29 | 西南交通大学 | A kind of electric power electric transformer |
| CN109600051A (en) * | 2018-12-06 | 2019-04-09 | 中国科学院电工研究所 | The through cophase supply device of non-full capacity and its control method |
| CN112332683A (en) * | 2020-11-10 | 2021-02-05 | 青岛鼎信通讯股份有限公司 | Power electronic transformer based on square wave converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 Termination date: 20210621 |