CN208796792U - A kind of traction-compensator transformer - Google Patents
A kind of traction-compensator transformer Download PDFInfo
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- CN208796792U CN208796792U CN201821488859.1U CN201821488859U CN208796792U CN 208796792 U CN208796792 U CN 208796792U CN 201821488859 U CN201821488859 U CN 201821488859U CN 208796792 U CN208796792 U CN 208796792U
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Abstract
The utility model discloses a kind of traction-compensator transformers, are related to electric railway traction power supply technique field.First primary side winding and the first secondary side winding and the second secondary side winding are set on a single-phase iron core, the second primary side winding, third secondary side winding are set on another single-phase iron core；The X terminal of second primary side winding is connect with the first primary side winding midpoint；The X terminal of third secondary side winding is connect with the midpoint of the first secondary side winding；The t terminal of second primary side winding and the t terminal of third secondary side winding are homopolar end, and the r ' terminal of the r terminal and the second secondary side winding of the R terminal of the first primary side winding and the first secondary side winding is homopolar end；Second secondary side winding is powered for homo-phase traction, and r terminal, s terminal and t terminal are for connecting reactive power compensator.The utility model is not only able to achieve cophase supply, cancels electric split-phase, effectively eliminates the voltage imbalance question of three-phase system caused by single-phase load.
Description
Technical field
The utility model relates to attached wires of AC electrified railway traction power supply technical fields.
Background technique
Electric railway generallys use the single phase industrial frequency AC system powered by municipal power supply system, to keep single-phase traction negative
Equilibrium assignmen, electric railway often use the side of rotation phase sequence, split-phase switched-mode power supply to lotus as far as possible in three-phase electrical power system
Case.Divided between adjacent service area at split-phase subregion with neutral section insulator, forms electric split-phase, also referred to as split-phase.To prevent electric power
Locomotive charges logical phase splitting transmitting and burns out overhead contact line component because of arcing, even results in the accidents such as phase fault, with
The continuous raising of train speed can not carry out moving back manually grade in driver, close auxiliary unit, disconnected main circuit breaker, sail by train inertia
Cross neutral section, again co-host break road device, close auxiliary unit, in the case where completing split-phase, used into level restoration traction power
Automatic passing over of neutral section technology mainly has floor switches to automatically switch split-phase, automatic passing over of neutral section on vehicle-mounted automatic passing over of neutral section and column
Etc. several, but there are still the electrical process of transient state that train in switching leads to phase splitting, it is also easy to produce biggish switching overvoltage
Or overcurrent, the accidents such as Traction networks and mobile unit scaling loss are caused, automatic passing over of neutral section operation failure is even resulted in, influencing power supply can
By property and safe train operation.Therefore, electric split-phase link is link most weak in entire tractive power supply system, and train crosses split-phase
Become the bottleneck of high-speed railway or even the power supply of entire electric railway traction.
The directly friendship type electric power of the high-power friendship based on wholly-controled devices such as IGBT, IGCT has been widely used in high speed and heavy haul railway
Locomotive or EMU, core are the traction convertors of multiple groups four-quadrant PWM control and multiplex control, and harmonic content is small, function
Rate factor hands over straight friendship type electric locomotive or EMU traction power big close to 1, the high-speed EMUs of such as big marshalling operation its
Rated power reaches 25MW, and 5 times of quite general fast railroad train, these high-power single-phase loads largely started make three phase network
At the main problem of power quality will be non-equilibrium among three phase voltages (negative phase-sequence) problem.
Accordingly, it is now desired to which the technical issues of solving is: when non-equilibrium among three phase voltages (negative phase-sequence) cannot be met the requirements,
A kind of tractive transformer with compensative winding of utility model makes the installed capacity for compensating negative phase-sequence while realizing cophase supply
Minimum, and related winding is integrated in one, and reduces land occupation, is easily installed.
Utility model content
The utility model aim is to provide a kind of traction-compensator transformer, and it is same can not only to effectively realize electric railway
Phase traction power supply, cancels the electric split-phase of electric substation outlet, and possesses and make the smallest compensative winding of negative sequence compensation installed capacity,
Effectively eliminate the voltage imbalance question of three-phase system caused by electric railway single-phase load.
The purpose of this utility model is realized by following technical scheme:
The first primary side winding is arranged on a single-phase iron core in a kind of traction-compensator transformer, including single-phase iron core and winding
With the first secondary side winding and the second secondary side winding, the second primary side winding, third secondary side winding are set on another single-phase iron core；Institute
The X terminal for stating the second primary side winding is connect with first primary side winding midpoint；The X terminal of the third secondary side winding with it is described
The connection of first secondary side winding midpoint, the t terminal ground of the third secondary side winding；The T terminal of second primary side winding and institute
The t terminal for stating third secondary side winding is homopolar end, the r of the R terminal of first primary side winding and the first secondary side winding
R ' the terminal of terminal and the second secondary side winding is homopolar end.
Preferably, the second secondary side winding and the single-phase wiring transformer of first primary side winding composition, described second
R ' the terminal of secondary side winding is connect with traction bus, s ' terminal and rail and connect.
Preferably, the end R of first primary side winding and S terminal are separately connected the two-phase in three phase network, and described second
The third phase of the T terminal connection three phase network of primary side winding.
It is further preferred that the T terminal of the R terminal and S terminal of first primary side winding and second primary side winding
Form isosceles triangle and the relationship of the number of turns m of the number of turns n and the first primary side winding of the second primary side winding are as follows:
Preferably, the t terminal of the r terminal of the first secondary side winding and s terminal and third secondary side winding forms isosceles three
It is angular, and the relationship of the number of turns m ' of the number of turns n ' of third secondary side winding and the first secondary side winding are as follows: n '=m '/2.
Preferably, the r terminal, s terminal and t terminal are connect with reactive power compensator.
It is further preferred that the voltage class between the r terminal of the connection reactive power compensator, s terminal and t terminal can
It is voluntarily selected with the voltage class independently of traction-compensator transformer the second secondary side winding.
Preferably, two single-phase iron cores of the traction-compensator transformer can be total to case installation.
Compared with prior art, the utility model has the beneficial effect that
Traction-compensator transformer described in the utility model can not only effectively cancel the electric split-phase of electric substation outlet, realize
Cophase supply, can further enhance the energy-saving effect of tractive power supply system, and possess compensative winding, hold negative sequence compensation device
Amount is minimum, can effectively eliminate the voltage imbalance question of three-phase system caused by electric railway single-phase load；In addition to being suitable for
Outside the traction substation and Traction networks directly powered, the traction substation and its Traction networks also powered for AT；This is practical simultaneously
Novel also have technologically advanced, reliable, and land occupation is few, the advantages that being easily installed.
Detailed description of the invention
Fig. 1 is traction described in the utility model embodiment-compensator transformer winding wiring topology schematic diagram.
Specific embodiment
In order to be best understood from the creation thought of the utility model, the working principle work of the utility model is said as follows herein
It is bright:
The X terminal of second primary side winding TX is connect with the first midpoint primary side winding RS, the first primary side winding RS corresponding
Two side winding r ' s ' feed out traction port, i.e. the first primary side winding RS and the second single-phase wiring transformation of secondary side winding r ' s ' composition
Device is powered for homo-phase traction；The x-terminal of third secondary side winding tx is connect with the first midpoint secondary side winding rs, r terminal, s terminal
And t terminal is for connecting reactive power compensator；The pass of the number of turns m of the number of turns n of second primary side winding TX and the first primary side winding RS
System are as follows:The relationship of the number of turns m ' of the number of turns n ' of third secondary side winding tx and the first secondary side winding rs is also are as follows: and n '=
M '/2, i.e. three terminals R, S, T of primary side form isosceles triangle, and secondary side three terminals r, s, t also form isosceles triangle；Work as original
When three terminal R, S, T the access three phase networks in side, shape angle in 90 ° between secondary side port tr and st, secondary side port tr and st divide
Not with the second secondary side winding r ' s ' (traction port) shape angle at 45 °；If power factor is equal to 1, when traction port is in traction
When operating condition, the reactive power compensator of secondary side port tr absorbs perceptual (or capacitive) reactive power Q1, the idle benefit of secondary side port st
Repay capacitive (or perception) idle Q that device absorbs equivalent2, then Q1With Q2The size of the sum of the negative sequence component of generation is equal to 2Q1Or
2Q2, and the negative sequence component direction generated with the traction load (or regenerating power) of the second secondary side winding r ' s ' (traction port)
On the contrary, realizing compensation and compensation device capacity for minimum.
Port is drawn in second secondary side winding r ' s ' extraction, implements cophase supply, cancels the electric split-phase of electric substation outlet, i.e., will
Originally out-phase power supply traction substation uplink and downlink supply arm merge, be more advantageous to wherein run multi-group trains traction with again
The mutual utilization of raw electric energy, reduces the electricity consumption from electric system, greatly increases energy conservation and section Zhi Xiaoguo.
This utility model is further described with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the utility model embodiment provides a kind of traction-compensator transformer, the traction-compensation transformation
Device, there are two single-phase iron cores；Coiling the first primary side winding RS and the first secondary side winding rs and the second secondary side on one single-phase iron core
Winding r ' s ', the second primary side winding of coiling TX, third secondary side winding tx on another single-phase iron core；The second primary side winding TX's
X terminal is connect with the midpoint the first primary side winding RS；The x-terminal of the third secondary side winding tx and the first secondary side winding
The connection of the midpoint rs；The t terminal of the T terminal of the second primary side winding TX and the third secondary side winding tx are homopolar end, institute
State the r ' of the R terminal of the first primary side winding RS Yu the r terminal of the first secondary side winding rs and the second secondary side winding r ' s '
Terminal is homopolar end.In the utility model embodiment, two single-phase iron cores of the traction-compensator transformer can be with
Case installation altogether.
In the utility model embodiment, the second secondary side winding r ' s ' and the first primary side winding RS constitutes single-phase
Wiring transformer, the second secondary side winding r ' s ' power for homo-phase traction, and r ' terminal is connect with traction bus, s ' terminal
With rail and connect.
In the utility model embodiment, the R terminal and S terminal of the first primary side winding RS and second primary side around
The T terminal of group TX forms isosceles triangle and the relationship of the number of turns m of the number of turns n of the second primary side winding TX and the first primary side winding RS
Are as follows:The end R of the first primary side winding RS and S terminal are separately connected the two-phase in three phase network, and described second is former
The third phase of the T terminal connection three phase network of side winding TX.
In the utility model embodiment, the r terminal and s terminal and third secondary side winding tx of the first secondary side winding rs
T terminal form isosceles triangle, and the relationship of the number of turns m ' of the number of turns n ' of third secondary side winding tx and the first secondary side winding rs
Are as follows: n '=m '/2；The end the t terminal ground of the third secondary side winding tx；The r terminal, s terminal and t terminal are for connecting nothing
Reactive power compensation installations.
In the utility model embodiment, between the r terminal, s terminal and t terminal for connecting reactive power compensator
Voltage class can independently of it is described for homo-phase traction power supply the second secondary side winding r ' s ' voltage class and voluntarily select
It selects.
Claims (7)
1. a kind of traction-compensator transformer, including two single-phase iron cores and winding, it is characterised in that: set on a single-phase iron core
The first primary side winding (RS) and the first secondary side winding (rs) and the second secondary side winding (r ' s ') are set, is arranged on another single-phase iron core
Second primary side winding (TX), third secondary side winding (tx)；In the X terminal and the first primary side winding (RS) of second primary side winding (TX)
Point connection；The x-terminal of third secondary side winding (tx) is connect with first midpoint secondary side winding (rs), the t of third secondary side winding (tx)
Terminal ground；The T terminal of second primary side winding (TX) and the t terminal of third secondary side winding (tx) are homopolar end, the first primary side
R ' the terminal of the r terminal and the second secondary side winding (r ' s ') of the R terminal of winding (RS) and the first secondary side winding (rs) is homopolarity
Property end.
2. traction-compensator transformer according to claim 1, it is characterised in that: the second secondary side winding (r ' s ') with
First primary side winding (RS) constitutes single-phase wiring transformer, and the r ' terminal of the second secondary side winding (r ' s ') is connect with traction bus,
S ' terminal and rail and connect.
3. traction-compensator transformer according to claim 1, it is characterised in that: the end R of first primary side winding (RS)
Son and S terminal are separately connected the two-phase in three phase network, the third of the T terminal connection three phase network of the second primary side winding (TX)
Phase.
4. traction-compensator transformer according to claim 3, it is characterised in that: the end R of first primary side winding (RS)
Son and S terminal and the T terminal of second primary side winding (TX) form the number of turns n of isosceles triangle and the second primary side winding (TX)
With the relationship of the number of turns m of the first primary side winding (RS) are as follows:
5. traction-compensator transformer according to claim 1, it is characterised in that: the end r of the first secondary side winding (rs)
The t terminal of son and s terminal and third secondary side winding (tx) forms isosceles triangle, and the number of turns n ' of third secondary side winding (tx) and
The relationship of the number of turns m ' of first secondary side winding (rs) are as follows: n '=m '/2.
6. traction-compensator transformer according to claim 1, it is characterised in that: the r terminal, s terminal and t terminal are equal
It is connect with reactive power compensator.
7. traction-compensator transformer according to claim 6, it is characterised in that: described for connecting reactive power compensator
R terminal, the voltage class between s terminal and t terminal is independently of traction-compensator transformer the second secondary side winding (r ' s ')
Voltage class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488859.1U CN208796792U (en) | 2018-09-12 | 2018-09-12 | A kind of traction-compensator transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488859.1U CN208796792U (en) | 2018-09-12 | 2018-09-12 | A kind of traction-compensator transformer |
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| Publication Number | Publication Date |
|---|---|
| CN208796792U true CN208796792U (en) | 2019-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821488859.1U Active CN208796792U (en) | 2018-09-12 | 2018-09-12 | A kind of traction-compensator transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215977A (en) * | 2018-09-12 | 2019-01-15 | 西南交通大学 | A kind of traction-compensator transformer |
| CN113808834A (en) * | 2021-09-09 | 2021-12-17 | 中铁二院工程集团有限责任公司 | Three-phase traction and electric power mixed type transformer for alternating current electrified rail transit engineering |
-
2018
- 2018-09-12 CN CN201821488859.1U patent/CN208796792U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109215977A (en) * | 2018-09-12 | 2019-01-15 | 西南交通大学 | A kind of traction-compensator transformer |
| CN109215977B (en) * | 2018-09-12 | 2023-09-29 | 西南交通大学 | Traction-compensation transformer |
| CN113808834A (en) * | 2021-09-09 | 2021-12-17 | 中铁二院工程集团有限责任公司 | Three-phase traction and electric power mixed type transformer for alternating current electrified rail transit engineering |
| CN113808834B (en) * | 2021-09-09 | 2023-07-28 | 中铁二院工程集团有限责任公司 | Three-phase traction and power hybrid transformer for alternating current electric rail transit engineering |
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