CN208797589U - A kind of negative sequence compensation device of traction-compensator transformer - Google Patents
A kind of negative sequence compensation device of traction-compensator transformer Download PDFInfo
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- CN208797589U CN208797589U CN201821488858.7U CN201821488858U CN208797589U CN 208797589 U CN208797589 U CN 208797589U CN 201821488858 U CN201821488858 U CN 201821488858U CN 208797589 U CN208797589 U CN 208797589U
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The utility model discloses a kind of negative phase-sequence devices of traction-compensator transformer.The negative sequence compensation device is installed on traction-compensator transformer, and reactive-load compensator and measurement and control unit including connecting with the traction-compensator transformer；The measurement and control unit is connect with the reactive-load compensator, for measure voltage transformer voltage value and current transformer current value and calculate traction port power and operating condition and control the reactive power of reactive-load compensator.The utility model can not only effectively eliminate the voltage imbalance question of three-phase system caused by single-phase load, but also have the effect of taking up an area less, be easily installed implementation, enhancing energy conservation, section branch.
Description
Technical field
The utility model relates to attached wires of AC electrified railway for the negative of electrical domain more particularly to a kind of traction-compensator transformer
Sequence compensation device.
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,
The negative sequence compensation device and negative sequence compensation method of a kind of traction-compensator transformer of utility model, make negative sequence compensation installed capacity most
It is small, 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 negative sequence compensation device of traction-compensator transformer, and can not only possess makes to bear
Sequence compensation device capacity is minimum, and the Voltage unbalance for effectively eliminating three-phase system caused by electric railway single-phase load is asked
Topic, but also related winding has high integration, land occupation is few, is easily installed.
In order to solve the above-mentioned technical problem, the utility model is specific as follows using a technical solution:
A kind of negative sequence compensation device of traction-compensator transformer, in which: the negative sequence compensation device is installed on traction-benefit
Repay transformer, and reactive-load compensator and measurement and control unit including connecting with the traction-compensator transformer；The measurement and control unit with
The reactive-load compensator connection, for measuring the voltage value of voltage transformer and the current value and calculating traction end of current transformer
Mouthful power and operating condition control the reactive power of reactive-load compensator.
Preferably, the reactive-load compensator includes the first reactive compensation unit and the second reactive compensation unit；Described first
Reactive compensation unit (SVG1) AC port and traction-compensator transformer third secondary side winding terminal t and the first secondary side around
The port tr connection that the terminal r of group is constituted, the second reactive compensation unit (SVG2) AC port and traction-compensation transformation
The terminal s of device the first secondary side winding constitutes port st with the terminal t of third secondary side winding and connects.
It is further preferred that the terminal of the input terminal of the measurement and control unit and the second secondary side of traction-compensator transformer winding
R ' is connected with the measurement end of the traction port voltage transformer of terminal s ' extraction with the measurement end of current transformer, the observing and controlling list
The output end of first MC is connect with the control terminal of the control terminal of first reactive compensation unit and second reactive compensation unit.
It is further preferred that the public company of the AC port of first reactive compensation unit and the second reactive compensation unit
Contact, that is, third secondary side winding tx terminal t ground connection.
Specifically, the first reactive compensation unit of the secondary side port tr absorbs perceptual (or capacitive) reactive power, described
The reactive compensation unit of secondary side port st absorbs capacitive (or perception) reactive power of equivalent.
Preferably, when traction port is in traction working condition, measurement and control unit controls the nothing that the first reactive compensation unit absorbs
Function power Q1For perception, the absorption of the second reactive compensation unit is idle Q2For capacitive, and Q1=Q1If Q1With Q2The negative phase-sequence of generation point
The sum of amount is SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2。
Preferably, when traction port is in regeneration regime, measurement and control unit controls the nothing that the first reactive compensation unit absorbs
Function power Q1The reactive power Q absorbed for capacitive, the second reactive compensation unit2For perception, and Q1=Q1If Q1With Q2What is generated is negative
The sum of order components are SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2。
Compared with prior art, the utility model has the beneficial effect that
Traction-compensator transformer described in the utility model can not only further enhance the energy-saving effect of tractive power supply system,
And possess compensative winding, keep negative sequence compensation installed capacity minimum, caused by electric railway single-phase load can be effectively eliminated
The voltage imbalance question of three-phase system；Other than the traction substation and Traction networks for being suitable for directly powering, also power for AT
Traction substation and its Traction networks；The utility model also has technologically advanced, reliable simultaneously, and land occupation is few, is easily installed
The advantages that.
Detailed description of the invention
Fig. 1 is traction described in the utility model-compensator transformer winding wiring schematic diagram.
Fig. 2 is the structural schematic diagram of traction-compensator transformer negative sequence compensation device described in the utility model embodiment.
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:
As shown in Figure 1, the end the X terminal of the second primary side winding TX is connect with the first midpoint primary side winding RS, the first primary side around
The corresponding second side winding r ' s ' of group RS feeds out traction port, i.e. the first primary side winding RS and the second secondary side winding r ' s ' composition list
Connect line transformer, powers for homo-phase traction；The end the x terminal of third secondary side winding tx and the first secondary side midpoint winding rs connect
It connects, r terminal, s terminal and t terminal are for connecting reactive power compensator；The number of turns n and the first primary side winding of second primary side winding TX
The relationship of the number of turns m of RS are as follows:The number of turns m's ' of the number of turns n ' of third secondary side winding tx and the first secondary side winding rs
Relationship is also are as follows: n '=m '/2, i.e. three terminals R, S, T of primary side form isosceles triangle, and secondary side three terminals r, s, t are also formed
Lumbar triangle shape；When three terminal R, S, T access three phase networks of primary side, shape angle in 90 °, secondary side between secondary side port tr and st
Port tr and st respectively with the second secondary side winding r ' s ' (traction port) shape angle at 45 °.
If traction-compensator transformer primary side negative phase-sequence allows capacity to be Sd, traction load power factor is 1: working as traction end
When mouth is in traction (regeneration) operating condition, measurement and control unit MC controls the first reactive compensation unit SVG1The reactive power Q of absorption1For sense
Property (capacitive), the second reactive compensation unit SVG2The idle Q of absorption2For capacitive (perception), and Q1=Q1If Q1With Q2What is generated is negative
The sum of order components are SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2；Work as Q1、Q2When < 0, Q is enabled1=Q2=0, it represents
First reactive compensation unit and the second reactive compensation unit are stopped transport.
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.With reference to the accompanying drawing and have
Body embodiment is further described this utility model.
As shown in Fig. 2, the utility model embodiment provides a kind of negative sequence compensation device of traction-compensator transformer,
In: the negative sequence compensation device NCS is installed on traction-compensator transformer, and including connecting with the traction-compensator transformer
Reactive-load compensator SVG and measurement and control unit MC；The measurement and control unit MC is connect with the reactive-load compensator SVG, for measuring voltage
Port active power is drawn in the voltage value of mutual inductor PT and the current value of Current Transmit and calculating and operating condition is idle to control
The reactive power of compensator SVG.
In the utility model embodiment, the reactive-load compensator SVG includes the first reactive compensation unit SVG1With second
Reactive compensation unit SVG2；The first reactive compensation unit SVG1AC port and the end that constitutes secondary side terminal t and terminal r
Mouth tr connection, the second reactive compensation unit SVG2AC port constitutes port st with secondary side terminal s and terminal t and connect.Institute
State the first reactive compensation unit SVG1With the second reactive compensation unit SVG2AC port points of common connection, that is, third secondary side around
The terminal t ground connection of group tx.
In the utility model embodiment, the survey of the input terminal and traction port voltage transformer pt of the measurement and control unit MC
Amount end is connected with the measurement end of Current Transmit, the output end of the measurement and control unit MC and first reactive compensation unit
SVG1Control terminal and the second reactive compensation unit SVG2Control terminal connection.
In the utility model embodiment, the first reactive compensation unit SVG of the secondary side port tr1Absorption perception (or
Capacitive) reactive power, the reactive compensation unit SVG of the secondary side port st2Absorb capacitive (or perception) reactive power of equivalent.
The work step of negative sequence compensation device described in the utility model embodiment is briefly described as follows:
Firstly, measurement and control unit MC calculates traction port by the voltage value of voltage transformer and the current value of current transformer
Power P and operating condition control the reactive power of the first reactive compensation unit and the second reactive compensation unit；If traction-compensation transformation
The negative phase-sequence of device primary side allows capacity to be Sd, traction load power factor is 1:
(1) when traction port is in traction working condition, measurement and control unit MC controls the first reactive compensation unit SVG1It absorbs
Reactive power Q1For perception, the second reactive compensation unit SVG2The idle Q of absorption2For capacitive, and Q1=Q1If Q1With Q2It generates
The sum of negative sequence component is SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2；(2) when traction port is in regeneration regime
When, measurement and control unit MC controls the first reactive compensation unit SVG1The reactive power Q of absorption1For capacitive, the second reactive compensation unit
SVG2The reactive power Q of absorption2For perception, and Q1=Q1If Q1With Q2The sum of negative sequence component of generation is SC, then Q1With Q2Value
For Q1=Q2=SC/ 2=(P-Sd)/2；(3) according to Q in above-mentioned (1) and (2)1、Q2Size judge the first reactive compensation unit
SVG1With the second reactive compensation unit SVG2Whether there is or not stoppages in transit.Work as Q1、Q2When < 0, Q is enabled1=Q2=0, represent the first reactive compensation list
First SVG1With the second reactive compensation unit SVG2Stop transport；Work as Q1、Q2When ﹥ 0, the first reactive compensation unit SVG is represented1With the second nothing
Function compensating unit SVG2Operate normally.
In the utility model embodiment, the reactive power Q of first reactive compensation unit1With the second reactive compensation list
The reactive power Q of member2The sum of positive-sequence component of generation is 0.The reactive power Q of first reactive compensation unit1It is idle with second
The reactive power Q of compensating unit2The size of the sum of the negative sequence component of generation is equal to 2Q1Or 2Q2, i.e. reactive power Q1With it is idle
Power Q2Only occupy traction-compensator transformer coil volume.
Claims (6)
1. a kind of negative sequence compensation device of traction-compensator transformer, it is characterised in that: negative sequence compensation device (NCS) installation
In traction-compensator transformer, and including the reactive-load compensator (SVG) being connect with the traction-compensator transformer and measurement and control unit
(MC)；The measurement and control unit (MC) connect with the reactive-load compensator (SVG), for measuring the voltage value of voltage transformer (PT)
With the current value of current transformer (CT) and calculate traction port power and operating condition and control the idle function of reactive-load compensator (SVG)
Rate.
2. a kind of negative sequence compensation device of traction-compensator transformer according to claim 1, it is characterised in that: the nothing
Function compensator (SVG) includes the first reactive compensation unit (SVG1) and the second reactive compensation unit (SVG2)；The first idle benefit
Repay unit (SVG1) AC port and traction-terminal t of compensator transformer third secondary side winding and the end of the first secondary side winding
The port tr connection that sub- r is constituted, the second reactive compensation unit (SVG2) AC port and traction-compensator transformer first
The terminal s of secondary side winding constitutes port st with the terminal t of third secondary side winding and connects.
3. a kind of negative sequence compensation device of traction-compensator transformer according to claim 2, it is characterised in that: the survey
It controls the input terminal of unit (MC) and the terminal r ' of the second secondary side of traction-compensator transformer winding and port is drawn in terminal s ' extraction
The measurement end of voltage transformer (PT) is connected with the measurement end of current transformer (CT), the output end of the measurement and control unit (MC) with
First reactive compensation unit (SVG1) control terminal and the second reactive compensation unit (SVG2) control terminal connection.
4. a kind of negative sequence compensation device of traction-compensator transformer according to claim 2, it is characterised in that: described
One reactive compensation unit (SVG1) and the second reactive compensation unit (SVG2) AC port points of common connection, that is, third secondary side around
The terminal t ground connection of group tx.
5. a kind of negative sequence compensation device of traction-compensator transformer according to claim 2, it is characterised in that: work as traction
When port is in traction working condition, measurement and control unit (MC) controls the first reactive compensation unit (SVG1) absorb reactive power Q1For sense
Property, the second reactive compensation unit (SVG2) the idle Q of absorption2For capacitive, and Q1=Q1If Q1With Q2The sum of negative sequence component of generation
For SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2。
6. a kind of negative sequence compensation device of traction-compensator transformer according to claim 2, it is characterised in that: work as traction
When port is in regeneration regime, measurement and control unit (MC) controls the first reactive compensation unit (SVG1) absorb reactive power Q1To hold
Property, the second reactive compensation unit (SVG2) absorb reactive power Q2For perception, and Q1=Q1If Q1With Q2The negative sequence component of generation
The sum of be SC, then Q1With Q2Value be Q1=Q2=SC/ 2=(P-Sd)/2。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821488858.7U CN208797589U (en) | 2018-09-12 | 2018-09-12 | A kind of negative sequence compensation device of traction-compensator transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821488858.7U CN208797589U (en) | 2018-09-12 | 2018-09-12 | A kind of negative sequence compensation device of traction-compensator transformer |
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| CN208797589U true CN208797589U (en) | 2019-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066737A (en) * | 2018-09-12 | 2018-12-21 | 西南交通大学 | A kind of negative sequence compensation devices and methods therefor of traction-compensator transformer |
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2018
- 2018-09-12 CN CN201821488858.7U patent/CN208797589U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066737A (en) * | 2018-09-12 | 2018-12-21 | 西南交通大学 | A kind of negative sequence compensation devices and methods therefor of traction-compensator transformer |
| CN109066737B (en) * | 2018-09-12 | 2024-01-09 | 西南交通大学 | Negative sequence compensation device and method for traction-compensation transformer |
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