CN106505562A - Railway power circulates potential device - Google Patents
Railway power circulates potential device Download PDFInfo
- Publication number
- CN106505562A CN106505562A CN201611086466.3A CN201611086466A CN106505562A CN 106505562 A CN106505562 A CN 106505562A CN 201611086466 A CN201611086466 A CN 201611086466A CN 106505562 A CN106505562 A CN 106505562A
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- Prior art keywords
- power
- transformer
- low
- circulates
- supply arm
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The present invention provides a kind of railway power and circulates potential device, including AC network, it is connected to the AC network both sides and is connected with first supply arm and the second supply arm of electric locomotive, connect the change flow module of first supply arm and the second supply arm, and the first power circulation transformer being connected between first supply arm and change flow module, the second power for being connected to second supply arm and becoming between flow module circulate transformer.The railway power circulation potential device that the present invention is provided, is effectively reduced impact of the locomotive traction load to the utility network quality of power supply, it is ensured that the safety of power system and economical operation.
Description
Technical field
The present invention relates to electric power power transformation or distribution technique field, more particularly to a kind of railway power circulation potential device.
Background technology
The electric railway of China is rapidly developed in recent years, the electric energy of a large amount of accesses of traction load to utility network
Quality brings considerable influence.Negative phase-sequence that electric locomotive is produced, harmonic wave, the power quality problem such as idle, are noted by traction substation
Enter utility network, harm is brought to power system, seriously threaten safety and the economical operation of power system.Wherein, negative-sequence current
The added losses of increase synchronous motor, reduction transformer are exerted oneself, cause protective relaying device malfunction etc.；Harmonic current causes generating
Machine, transformer, transmission line of electricity added losses, and Harmonics amplification may be produced burn power equipment；Reactive power is not enough, and increase is defeated
Electric line is lost, and reduces voltage levvl.
Content of the invention
This is based on, for solving the above problems, the present invention provides a kind of railway power and circulates potential device, is effectively reduced machine
Impact of the car traction load to the utility network quality of power supply, it is ensured that the safety of power system and economical operation.
Its technical scheme is as follows：
A kind of railway power circulates potential device, including AC network, is connected to the AC network both sides and connects
First supply arm and the second supply arm of electric locomotive is connected to, connects the unsteady flow mould of first supply arm and the second supply arm
Block, and be connected to first supply arm and become flow module between the first power circulation transformer, be connected to described second
Supply arm and the second power become between flow module circulate transformer；
First power circulation transformer and the second power circulation transformer include and first supply arm or the
The high-pressure side of two supply arms connection, and become the low-pressure end that flow module is connected with described；The change flow module includes current transforming unit,
The current transforming unit include with first power circulate transformer the IGBT power models that are connected of the low-pressure end and
The 2nd IGBT power models and be connected to described first that the low-pressure end of the second power circulation transformer connects
DC capacitor between IGBT power models and the 2nd IGBT power models.
By between the first supply arm and the second supply arm connect setting become flow module, the first power circulate transformer and
Second power circulates transformer, realizes that (power circulation transformer is to realize for power transfer between two supply arms of AC network
The important step of the active power transfer of two supply arms), the active balance that two supply arms are reached by power transfer, and can be similar to
In distribution static synchronous compensator compensating reactive power, make three-phase current tend to symmetrical, realize negative phase-sequence, harmonic wave and idle comprehensive benefit
Repay.By power compensating device to the energy exchange between two supply arms, electric locomotive traction load is effectively reduced to handing over
The impact of the stream electrical network quality of power supply, and pass through setting power circulation transformer and can further reduce power quality adjusting device
The capacity of (change flow module), reaches cost-effective purpose.
Below further technical scheme is illustrated：
Further, the first power circulation transformer and the second power circulation transformer are disposed as single-phase Multiple coil
Transformer.
Further, the single-phase multiwinding transformer includes rectangular box-like iron core, a group be set around on the iron core
High-tension coil, and the multigroup low-voltage coil being set around on iron core；
The high-tension coil is formed the high-pressure side and is connected with first supply arm or the second supply arm, the low pressure
Coil is formed the low-pressure end and is connected with IGBT power models or the 2nd IGBT power models.
Further, the change flow module includes multiple current transforming units corresponding with the low-voltage coil, each described change
Described in a group of IGBT power models and first power circulation transformer for flowing unit, low-voltage coil is corresponding connects
Connect, the 2nd IGBT power models and second power circulate one group of transformer described in low-voltage coil is corresponding connects.
Further, the first power circulation transformer and the second power circulation transformer are disposed as single-phase four winding
Transformer, single-phase four winding transformer have low-voltage coil described in four groups, and the change flow module includes low with described in four groups
Corresponding four current transforming units of line ball circle.
Further, the unshakable in one's determination wrapping posts for including two vertically side by side, the high-tension coil are included rotating around being located at
Per one group of high pressure winding on wrapping post described in root；
Upper and lower two high pressure winding elements, and the institute per root is split into per high voltage winding group described in a group on wrapping post described in root
State after the high pressure winding elements parallel connection of two on wrapping post with another wrapping post on two high pressure windings
Unit is in parallel.
Further, per group of low-voltage coil includes being correspondingly arranged in of a high pressure winding unit inside
Low pressure winding, each described low pressure winding include a low pressure winding unit, and each described low pressure winding unit is separate
And IGBT power models described with or the 2nd IGBT power models are connected.
Further, the rectangular box-like silicon steel sheet for including multi-disc closed assembly unshakable in one's determination, and the two ends of silicon steel sheet described in multi-disc
Clamp structure is folded with respectively.
The present invention has prominent as follows：Become flow module and power circulation change by arranging between two supply arms
The power quality adjusting device that depressor is formed, realizes that between two supply arms of AC network power transfer reaches two supply arms
Active balance.It is effectively reduced impact of the electric locomotive traction load to the AC network quality of power supply, it is possible to further reduce
The capacity of power quality adjusting device, cost-effective.
Description of the drawings
Fig. 1 is the electrical block diagram that railway power described in the embodiment of the present invention circulates potential device；
Fig. 2 is that the circuit structure of the power circulation transformer of railway power circulation potential device described in the embodiment of the present invention shows
It is intended to；
Fig. 3 is that the entity structure of the power circulation transformer of railway power circulation potential device described in the embodiment of the present invention is shown
It is intended to；
Fig. 4 is the electrical block diagram of the change flow module of railway power circulation potential device described in the embodiment of the present invention.
Description of reference numerals：
100- AC networks, the first supply arms of 110-, the second supply arms of 120-, 200- become flow module, the first IGBT of 210-
Power model, the 2nd IGBT power models of 220-, 230- DC capacitors, the first power of 300a- circulate transformer, 300b- second
Power circulates transformer, and 302- high-pressure sides, 304- low-pressure ends, 310- are unshakable in one's determination, 320- clamp structures, 330- high-tension coils (or low
Line ball circle), 332- high pressure winding elements, 334- low pressure winding units.
Specific embodiment
Below embodiments of the invention are described in detail：
As shown in figure 1, a kind of railway power circulates potential device, including AC network 100, the exchange is connected to
100 both sides of electrical network are simultaneously connected with first supply arm 110 and the second supply arm 120 of electric locomotive, are connected to described first and supply
Change flow module 200 between electric arm 110 and the second supply arm 120, and be connected to first supply arm 110 and become flow module
The first power circulation transformer 300a between 200, be connected to second supply arm 120 and become between flow module 200 the
Two power circulate transformer 300b.Flow module is become by connect setting between the first supply arm 110 and the second supply arm 120
200th, the first power circulation transformer 300a and the second power circulation transformer 300b, AC network 100 two supply arms it
Between realize power transfer (power circulation transformer be realize two supply arms active power transfer important step), by work(
Rate transfer reaches the active balance of two supply arms, and can be similar to distribution static synchronous compensator compensating reactive power, makes three-phase electricity
Stream tends to symmetrical, realizes negative phase-sequence, harmonic wave and idle comprehensive compensation.By power compensating device to the energy between two supply arms
Amount is exchanged, and is effectively reduced impact of the electric locomotive traction load to the AC network quality of power supply, and is passed through to arrange power circulation
Transformer can further reduce the capacity of power quality adjusting device (change flow module), reach cost-effective purpose.
Additionally, as shown in Figure 2 to Figure 3, the first power circulation transformer 300a and the second power circulate transformer
300b includes the high-pressure side 302 being connected with first supply arm 110 or the second supply arm 120, and with the unsteady flow mould
The low-pressure end 304 of the connection of block 200.
Additionally, as shown in figure 4, described change flow module 200 include current transforming unit, the current transforming unit includes and described first
First IGBT power models 210 of the connection of the low-pressure end 304 of power circulation transformer 300a and second power circulation
The 2nd IGBT power models 220 and be connected to an IGBT power that the low-pressure end 304 of transformer 300b connects
DC capacitor 230 between module 210 and the 2nd IGBT power models 220.And IGBT power models and second
IGBT power module circuit structures are identical.Become flow module 200 to be made up of with DC capacitor multiple IGBT power models.IGBT work(
Rate module can achieve the process of commutation inversion, and carry out voltage stabilizing by DC capacitor, stable during power bi-directional circulates
Ac grid voltage.IGBT power models are with insulated gate bipolar transistor (IGBT, i.e. Insulated Gate Bipolar
Transistor the power model for) constituting, IGBT power models are voltage mode controls, and greatly, driving power is little for input impedance, control
Circuit is simple, and switching loss is little, and break-make speed is fast, and operating frequency is high, and element volume is big.DC capacitor is DC support electric capacity
Device, also known as DC-Link capacitors, mainly carries out smothing filtering to the output voltage of IGBT power models in inverter circuit,
Absorb and come from the amplitude pulsating current that IGBT power models are asked for DC capacitor, prevent which in the impedance of DC capacitor
Amplitude pulsating volage is produced, is made the voltage pulsation on dc bus be maintained at allowed band, can also be prevented from coming from direct current
The impact of the voltage overshoot of appearance and instantaneous overvoltage to IGBT power models.
And, as shown in figure 3, first power circulation transformer 300a and the second power circulation transformer 300b are all provided with
It is set to single-phase multiwinding transformer.The low short-circuit impedance that the single-phase multiwinding transformer is different from traditional power transformer is (big
General 4%～8%), power circulation transformer (i.e. the first power circulation transformer 300a or the second power circulation transformer can be made
Short-circuit impedance 300b) and becomes flow module up to 30%～40% high-impedance behavior (using equivalent leakage reactance as filter inductance)
200 cooperations can filter 13 times and following higher hamonic wave in AC network.
Further, the single-phase multiwinding transformer includes rectangular box-like unshakable in one's determination 310, is set around on described unshakable in one's determination 310
One group of high-tension coil 330 and the multigroup low-voltage coil being set around on unshakable in one's determination 310.The high-tension coil forms the high pressure
End 302 is simultaneously connected with first supply arm 110 or the second supply arm 120, and the low-voltage coil forms the low-pressure end 304 simultaneously
It is connected with IGBT power models 210 or the 2nd IGBT power models 220.Accordingly, the change flow module 200 includes
Multiple current transforming units corresponding with the low-voltage coil, the IGBT power models 210 of each current transforming unit with
Low-voltage coil described in a group of the first power circulation transformer 300a correspondingly connects, the 2nd IGBT power models 220
Connect with described in a group that second power circulates transformer 300b, low-voltage coil is corresponding.
In one embodiment, the first power circulation transformer 300a and the second power circulation transformer 300b are all provided with
Single-phase four winding transformer is set to, single-phase four winding transformer has low-voltage coil described in four groups, the change flow module 200
Including four current transforming units corresponding with low-voltage coil described in four groups.And, described unshakable in one's determination 310 include two vertically side by side
Wrapping post, the high-tension coil include rotating around be located at per one group of high pressure winding on wrapping post described in root.Per described in root around
High voltage winding group described in a group on terminal is split into upper and lower two high pressure winding elements 332, and per two on wrapping post described in root
In parallel with two high pressure winding elements 332 on another wrapping post after individual 332 parallel connection of high pressure winding element.
Additionally, per group of low-voltage coil includes being correspondingly arranged in a low pressure winding on the inside of a high pressure winding element 332,
Each described low pressure winding includes a low pressure winding unit 334 (being equally set around on the wrapping post), and each is described low
Separate and described with the one IGBT power models 210 of pressure winding element 334 or the 2nd IGBT power models 220 connect
Connect.I.e. described high-tension coil is using the splitted construction that two posts are in parallel and single-column is in parallel up and down, and low-voltage coil described in four groups point
The high-tension coil of division not in parallel with four corresponds distribution.Power circulation transformer (the first power using said structure
Circulation transformer 300a and the second power circulation transformer 300b), severe in applying working condition, traction power supply net high harmonic content,
The power quality problems such as negative-sequence current, reactive loss are serious, and transformer is connected with change flow module and there is certain DC component
In the case of, can solve the problem that the transformer core magnetic saturation caused when raising voltage, core loss increase, transformer noise increases
The problems such as.In addition, the equivalent leakage reactance of power circulation transformer is as filter inductance, ac grid voltage is filtered, is adopted
With the power circulation transformer of said structure, it is ensured that the stability of transformer impedance, can make to pass through impedance (four groups of low-voltage lines
Impedance circle puts into operation simultaneously when) and partly to pass through impedance (impedance when single group, two groups or three groups of low-voltage coils put into operation) steady
Surely maintain between 30%～40%.
Additionally, the iron core can adopt laminated structure, including the rectangular box-like silicon steel sheet of multi-disc closed assembly, every silicon steel sheet
It is divided into two parts to reconnect together, is so easy to place the coil on core limb.And, two of silicon steel sheet described in multi-disc
End is folded with clamp structure respectively, can be by clamping unshakable in one's determination by clamp structure.
Railway power proposed by the present invention circulates potential device, becomes flow module and work(by arranging between two supply arms
The power quality adjusting device that rate circulation transformer is formed, realizes that between two supply arms of AC network power transfer makes two confessions
Electric arm reaches active balance.It is effectively reduced impact of the electric locomotive traction load to the AC network quality of power supply, it is possible to enter
One step reduces the capacity of power quality adjusting device, cost-effective.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore can not be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (8)
1. a kind of railway power circulates potential device, it is characterised in that including AC network, be connected to the AC network
Both sides are simultaneously connected with first supply arm and the second supply arm of electric locomotive, connect first supply arm and the second supply arm
Become flow module, and the first power being connected between first supply arm and change flow module circulates transformer, is connected to institute
The second power that states the second supply arm and become between flow module circulates transformer；
The first power circulation transformer and the second power circulation transformer include supplying with first supply arm or second
The high-pressure side of electric arm connection, and become the low-pressure end that flow module is connected with described；The change flow module includes current transforming unit, described
Current transforming unit includes circulating the IGBT power models that are connected of the low-pressure end of transformer and described with first power
The 2nd IGBT power models and be connected to an IGBT work(that the low-pressure end of the second power circulation transformer connects
DC capacitor between rate module and the 2nd IGBT power models.
2. railway power according to claim 1 circulates potential device, it is characterised in that first power circulates transformation
Device and the second power circulation transformer are disposed as single-phase multiwinding transformer.
3. railway power according to claim 2 circulates potential device, it is characterised in that the single-phase multiwinding transformer
Including rectangular box-like iron core, one group of high-tension coil being set around on the iron core, and the multigroup low-voltage line being set around on iron core
Circle；
The high-tension coil is formed the high-pressure side and is connected with first supply arm or the second supply arm, the low-voltage coil
Form the low-pressure end and be connected with IGBT power models or the 2nd IGBT power models.
4. railway power according to claim 3 circulates potential device, it is characterised in that the change flow module includes multiple
Current transforming unit corresponding with the low-voltage coil, IGBT power models and described first of each current transforming unit
Described in a group of power circulation transformer, low-voltage coil correspondingly connects, the 2nd IGBT power models are melted with second power
Low-voltage coil described in a group of logical transformer correspondingly connects.
5. railway power according to claim 4 circulates potential device, it is characterised in that first power circulates transformation
Device and the second power circulation transformer are disposed as single-phase four winding transformer, and single-phase four winding transformer has four groups of institutes
Low-voltage coil is stated, the change flow module includes four current transforming units corresponding with low-voltage coil described in four groups.
6. railway power according to claim 5 circulates potential device, it is characterised in that described unshakable in one's determination vertical including two
Wrapping post side by side, the high-tension coil are included rotating around located at per one group of high pressure winding on wrapping post described in root；
Be split into upper and lower two high pressure winding elements per high voltage winding group described in a group on wrapping post described in root, and per described in root around
After the high pressure winding elements parallel connection of two on terminal with another wrapping post on two high pressure winding elements
In parallel.
7. railway power according to claim 6 circulates potential device, it is characterised in that per group of low-voltage coil includes
A low pressure winding of a high pressure winding unit inside is correspondingly arranged in, each described low pressure winding includes a low pressure
Winding element, and separate and described with the one IGBT power models of each described low pressure winding unit or the 2nd IGBT
Power model connects.
8. railway power according to claim 3 circulates potential device, it is characterised in that described unshakable in one's determination including multi-disc closed assembly
Rectangular box-like silicon steel sheet, and the two ends of silicon steel sheet described in multi-disc are folded with clamp structure respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086466.3A CN106505562A (en) | 2016-11-30 | 2016-11-30 | Railway power circulates potential device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086466.3A CN106505562A (en) | 2016-11-30 | 2016-11-30 | Railway power circulates potential device |
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| CN106505562A true CN106505562A (en) | 2017-03-15 |
Family
ID=58329237
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| CN201611086466.3A Pending CN106505562A (en) | 2016-11-30 | 2016-11-30 | Railway power circulates potential device |
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| CN (1) | CN106505562A (en) |
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| CN109616297A (en) * | 2019-01-17 | 2019-04-12 | 顺特电气设备有限公司 | A kind of dry-type transformer for railway cophase supply trailer system |
| CN110661260A (en) * | 2019-10-08 | 2020-01-07 | 国网湖南省电力有限公司 | Power grid load flow calculation method based on four-winding induction filter transformer equivalent model |
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| CN109616297B (en) * | 2019-01-17 | 2021-05-04 | 顺特电气设备有限公司 | Dry-type transformer for railway in-phase power supply traction system |
| CN110661260A (en) * | 2019-10-08 | 2020-01-07 | 国网湖南省电力有限公司 | Power grid load flow calculation method based on four-winding induction filter transformer equivalent model |
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