CN208939596U - A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation - Google Patents
A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation Download PDFInfo
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- CN208939596U CN208939596U CN201821909935.1U CN201821909935U CN208939596U CN 208939596 U CN208939596 U CN 208939596U CN 201821909935 U CN201821909935 U CN 201821909935U CN 208939596 U CN208939596 U CN 208939596U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a kind of cophase supply comprehensive compensating devices compensated based on single-phase transformation and YNd, are related to attached wires of AC electrified railway power supply technique field.The comprehensive compensating device of the cophase supply traction substation is mainly made of the first reactive compensation unit, the second reactive compensation unit, third reactive compensation unit and the 4th reactive compensation unit；First reactive compensation unit is connected to single-phase main transformer secondary side, and the second reactive compensation unit, third reactive compensation unit and the 4th reactive compensation unit are connected to the secondary side of YNd joint group three-phase compensator transformer.Therefore, the utility model can not only effectively cancel the electric split-phase in traction substation exit, realize cophase supply, moreover it is possible to the technical issues of efficiently solving the idle and negative phase-sequence progress real-time compensation of traction substation generation.
Description
Technical field
The utility model relates to attached wires of AC electrified railway power supply technique field more particularly to cophase supply traction substations
Idle, negative phase-sequence comprehensive compensation technique.
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.It is isolated between adjacent service area at split-phase subregion with neutral section insulator, forms electric split-phase, abbreviation split-phase.Electric split-phase link
It is link most weak in entire tractive power supply system, train excessively mutually becomes high-speed railway or even entire electric railway is led
Draw the bottleneck of power supply.
Theory and practice shows to use single-phase traction transformer or combined type cophase supply technology can be in traction substation
The electric split-phase for cancelling its exit uses bilateral connection technology that can cancel the electric split-phase at this, to eliminate confession in subregion
Storage battery neck improves railway power supply ability and transport capacity.But its core is realized by changing the effective power flow of traction substation
Negative sequence compensation keeps negative phase-sequence up to standard.
The utility model does not change the effective power flow of traction substation, solves traction substation by reactive power flow control
Idle and negative phase-sequence comprehensive compensation technique problem, realize cophase supply, meanwhile, increase power factor improves feeder voltage, and
Negative sequence management is set to be up to state standards requirement.
Utility model content
The utility model aim is to provide a kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation,
It can efficiently solve the technical issues of idle and negative phase-sequence real-time compensation of cophase supply traction substation generation.
In order to solve the above-mentioned technical problem, technical solution used by the utility model is specific as follows:
A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation, is set to cophase supply traction and becomes
The single-phase main transformer pressure that in electric institute, the cophase supply traction substation includes three-phase high-voltage bus, is connect with three-phase high-voltage bus
Device and three-phase compensator transformer；The three-phase compensator transformer is coupled winding, primary side and the three-phase high-voltage using YNd
A, B, C tri- of bus is connected；The cophase supply comprehensive compensating device includes the first reactive compensation unit, the second reactive compensation
Unit, third reactive compensation unit and the 4th reactive compensation unit and measurement and control unit；First reactive compensation unit and institute
The secondary side connection of single-phase main transformer is stated, second reactive compensation unit is connect with three-phase compensator transformer secondary side a phase port,
The third reactive compensation unit is connect with three-phase compensator transformer secondary side b phase port, the 4th reactive compensation unit and three
The connection of phase compensator transformer secondary side c phase port；The measurement and control unit includes voltage transformer, current transformer and controller；Institute
The input terminal for stating controller is connect with the measurement end of the voltage transformer, current transformer respectively, the output of the controller
End respectively with the first reactive compensation unit, the second reactive compensation unit, third reactive compensation unit, the 4th reactive compensation unit
Control terminal connection.The voltage transformer input terminal is connected to the secondary side of single-phase main transformer, current transformer input terminal and feedback
Line concatenation.The single-phase main transformer primary side winding in three-phase high-voltage bus A phase and B be connected, secondary side winding one end
Ground connection, the other end lead to Traction networks through feeder line and connect.
Preferably, the voltage transformer input terminal is connected to single-phase main transformer secondary side, current transformer input terminal string
It is connected on feeder line.
Preferably, the single-phase main transformer primary side winding in three-phase high-voltage bus A phase and B be connected；The list
Secondary side winding one end of phase main transformer is grounded, and the other end leads to Traction networks through feeder line and connects.
In order to solve the above-mentioned technical problem, the utility model needs to realize using following technical scheme:
A kind of comprehensive compensation method of the cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation, in which: institute
State the comprehensive compensation method specific steps of cophase supply are as follows:
(1) negative phase-sequence for setting three-phase high-voltage bus allows capacity as Sε；
(2) controller is calculated first with the voltage and current that t moment voltage transformer and current transformer measure respectively
(regard) power s and its power factor by the traction load of feeder line as cos φ, further according to Target Towing load power factor or
Target feeder voltage is to the first reactive compensation unit absorbing reactive power Q1It is controlled and is compensated, and Q1Capacitive is positive；At this point,
Q1The negative sequence power s generated with s-Size be
(3) judge Q1The negative sequence power s generated with s-Allow capacity S with the negative phase-sequence of three-phase high-voltage busεBetween size close
System, then by controller control the second reactive compensation unit, third reactive compensation unit, the 4th reactive compensation unit absorption it is idle
Power compensates, wherein the absorption nothing of the second reactive compensation unit, third reactive compensation unit, the 4th reactive compensation unit
Function power is respectively Q2、Q3、Q4。
Preferably, work as s-≤SεWhen, then controller controls the second reactive compensation unit, third reactive compensation unit, the 4th nothing
Function compensating unit absorbing reactive power compensates, andThat is reactive power Q1When for capacitive, Q2、
Q3、Q4For perception, wherein k≤1, k are real number.
Preferably, work as s-> SεWhen, then existOn the basis of component, controller controls the second idle benefit
The further absorbing reactive power component of unit, third reactive compensation unit is repaid to compensate, wherein Q2And Q3Component size difference
Are as follows:
Wherein set
It is further preferred that when feeder line is in traction working condition, then Q2Component be perception, Q3Component be capacitive.
It is further preferred that when feeder line is in regeneration regime, then Q2Component be capacitive, Q3Component be perception.
Compared with prior art, the utility model has the beneficial effects that
One, the comprehensive compensating device, which can integrate, generates reactive component and negative sequence component, makes power factor, feeder voltage
Comprehensive compensation is obtained with negative phase-sequence, cophase supply is realized, does not change the effective power flow of traction substation Traction networks, matched three-phase
Compensator transformer does not transmit positive sequence active power, has the technical advantage for exempting from electrical capacity charge；
Two, the reactive-load compensator operating condition of the comprehensive compensating device is reversible, when feeder line is in equivalent regeneration regime, still may be used
Electric energy up to standard is sent out to power grid；
Three, single-phase main transformer and three-phase compensator transformer can be total to case installation, reduce land occupation；
Four, structure is simple, and superior performance, technologically advanced, method is reliable, easy to implement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is relational structure schematic diagram between the utility model measurement and control unit and reactive compensation unit.
Specific embodiment
It is created to be best understood from the utility model, briefly explains utility model works principle herein: by being connected to
The first reactive compensation unit compensation traction power factor and feeder voltage of single-phase main transformer secondary side, make traction power factor and
Feeder voltage reaches target call；Using three-phase high-voltage bus as negative phase-sequence examination point up to standard, by being connected to three-phase compensator transformer
Secondary side the 4th reactive compensation unit it is idle power output and the second reactive compensation unit, a part of nothing of third reactive compensation unit
Function power output (component) corrects the excessive idle power output of the first reactive compensation unit jointly, the second reactive compensation unit, third without
Power output (component) that another part of function compensating unit is idle combines generation to compensate traction load and the first reactive compensation unit
Negative-sequence current (power), reaches national standard after compensation, wherein the second reactive compensation unit and third reactive compensation unit generate
Negative phase-sequence trend, and do not change original effective power flow.The utility model is made into one with reference to the accompanying drawings and detailed description
The description of step.
As shown in Figure 1, to provide a kind of cophase supply compensated based on single-phase transformation and YNd comprehensive for the utility model embodiment
Compensation device is closed, is set in cophase supply traction substation, the cophase supply traction substation mainly includes three-phase high-voltage
Bus HB, the single-phase main transformer TT, the three-phase compensator transformer MT that are connect with three-phase high-voltage bus HB and with single-phase main transformer pressure
The Traction networks OCS of device TT connection；The three-phase compensator transformer MT uses YNd joint group, and primary side and the three-phase high-voltage are female
A, B, C tri- of line HB is connected；Wherein: the cophase supply comprehensive compensating device is mainly by the first reactive compensation unit SVG1、
Second reactive compensation unit SVG2, third reactive compensation unit SVG3With the 4th reactive compensation unit SVG4It constitutes；First nothing
Function compensating unit SVG1It is connected to the secondary side of the single-phase main transformer TT, the second reactive compensation unit SVG2, the third
Reactive compensation unit SVG3With the 4th reactive compensation unit SVG4It is connected to time of the three-phase compensator transformer MT
Side.In the utility model embodiment, the voltage transformer pt input terminal is connected to single-phase main transformer TT secondary side, and electric current is mutual
Sensor CT input terminal is serially connected on feeder line F.The single-phase main transformer TT primary side winding in three-phase high-voltage bus HB A phase and
B is connected；Secondary side winding one end of the single-phase main transformer TT is grounded, and the other end leads to Traction networks OCS through feeder line F and connects
It connects, Traction networks OCS powers to train LC.
In the utility model embodiment, the second reactive compensation unit SVG2With three-phase compensator transformer MT secondary side a
The connection of phase port, the third reactive compensation unit SVG3It is connect with three-phase compensator transformer MT secondary side b phase port, the described 4th
Reactive compensation unit SVG4It is connect with three-phase compensator transformer MT secondary side c phase port.
As shown in Fig. 2, the cophase supply comprehensive compensating device further includes measurement and control unit in the utility model embodiment
MC, the measurement and control unit MC are mainly collectively formed by voltage transformer pt, Current Transmit and controller CD；The controller
The input terminal of CD is connect with the measurement end of the measurement end of the voltage transformer pt, the Current Transmit respectively, the control
Device CD output end processed respectively with the first reactive compensation unit SVG1, the second reactive compensation unit SVG2, third reactive compensation unit
SVG2, the 4th reactive compensation unit SVG4Control terminal connection.
Claims (3)
1. a kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation, is set to cophase supply traction power transformation
In institute (SS), the cophase supply traction substation (SS) includes that three-phase high-voltage bus (HB) and three-phase high-voltage bus (HB) connect
The single-phase main transformer (TT) and three-phase compensator transformer (MT) connect；The three-phase compensator transformer (MT) is coupled using YNd
Winding, primary side are connected with A, B, C tri- of the three-phase high-voltage bus (HB)；It is characterized by: the comprehensive compensating device
Including the first reactive compensation unit (SVG1), the second reactive compensation unit (SVG2), third reactive compensation unit (SVG3) and the 4th
Reactive compensation unit (SVG4) and measurement and control unit (MC)；First reactive compensation unit (the SVG1) and the single-phase main transformer pressure
The secondary side of device (TT) connects, the second reactive compensation unit (SVG2) connect with three-phase compensator transformer (MT) secondary side a phase port
It connects, the third reactive compensation unit (SVG3) connect with three-phase compensator transformer (MT) secondary side b phase port, the described 4th is idle
Compensating unit (SVG4) connect with three-phase compensator transformer (MT) secondary side c phase port；The measurement and control unit (MC) includes that voltage is mutual
Sensor (PT), current transformer (CT) and controller (CD)；The input terminal of the controller (CD) respectively with the mutual induction of voltage
Device (PT), current transformer (CT) measurement end connection, the output end of the controller (CD) respectively with the first reactive compensation list
Member (SVG1), the second reactive compensation unit (SVG2), third reactive compensation unit (SVG2), the 4th reactive compensation unit (SVG4)
Control terminal connection.
2. a kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation according to claim 1, special
Sign is: voltage transformer (PT) input terminal is connected to the secondary side of single-phase main transformer (TT), and current transformer (CT) is defeated
Enter end to concatenate with feeder line (F).
3. a kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation according to claim 1, special
Sign is: single-phase main transformer (TT) primary side winding in three-phase high-voltage bus (HB) A phase and B be connected, secondary side
Winding one end ground connection, the other end lead to Traction networks (OCS) through feeder line (F) and connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821909935.1U CN208939596U (en) | 2018-11-20 | 2018-11-20 | A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821909935.1U CN208939596U (en) | 2018-11-20 | 2018-11-20 | A kind of cophase supply comprehensive compensating device based on single-phase transformation and YNd compensation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256785A (en) * | 2018-11-20 | 2019-01-22 | 西南交通大学 | Cophase supply comprehensive compensating device and its method based on single-phase transformation and YNd compensation |
| CN110611323A (en) * | 2019-09-30 | 2019-12-24 | 西南交通大学 | Electrified railway in-phase power supply comprehensive compensation device and comprehensive compensation method thereof |
-
2018
- 2018-11-20 CN CN201821909935.1U patent/CN208939596U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256785A (en) * | 2018-11-20 | 2019-01-22 | 西南交通大学 | Cophase supply comprehensive compensating device and its method based on single-phase transformation and YNd compensation |
| CN109256785B (en) * | 2018-11-20 | 2023-09-29 | 西南交通大学 | In-phase power supply comprehensive compensation device and method based on single-phase transformation and YNd compensation |
| CN110611323A (en) * | 2019-09-30 | 2019-12-24 | 西南交通大学 | Electrified railway in-phase power supply comprehensive compensation device and comprehensive compensation method thereof |
| CN110611323B (en) * | 2019-09-30 | 2023-09-01 | 西南交通大学 | Electrified railway in-phase power supply comprehensive compensation device and comprehensive compensation method thereof |
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