CN109510212A - Cophase supply comprehensive compensating device and its method based on single-phase transformation and T wiring compensation - Google Patents
Cophase supply comprehensive compensating device and its method based on single-phase transformation and T wiring compensation Download PDFInfo
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- CN109510212A CN109510212A CN201811381548.XA CN201811381548A CN109510212A CN 109510212 A CN109510212 A CN 109510212A CN 201811381548 A CN201811381548 A CN 201811381548A CN 109510212 A CN109510212 A CN 109510212A
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- 230000009466 transformation Effects 0.000 title claims abstract description 18
- 238000000819 phase cycle Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 238000004804 winding Methods 0.000 claims description 14
- 230000008447 perception Effects 0.000 claims description 8
- 230000006870 function Effects 0.000 claims description 7
- 230000008929 regeneration Effects 0.000 claims description 4
- 238000011069 regeneration method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Classifications
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- 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
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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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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Abstract
The invention discloses a kind of cophase supply comprehensive compensating device compensated based on single-phase transformation and T wiring and its methods, are related to attached wires of AC electrified railway power supply technique field.The cophase supply comprehensive compensating device includes the first reactive compensation unit, the second reactive compensation unit, the 4th reactive compensation unit of third reactive compensation unit and measurement and control unit；First reactive compensation unit is connected to single-phase main transformer secondary side；One end of second reactive compensation unit, the third reactive compensation unit and the 4th reactive compensation unit is connect with the three-phase compensator transformer respectively, and the other end is connect with the measurement and control unit respectively.In addition, also disclosing a kind of cophase supply comprehensive compensation method based on single-phase transformation and T wiring compensation.Therefore, the present invention 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 present invention relates to attached wires of AC electrified railway for electrical domain, more particularly to one kind is based on single-phase main transformer and T wiring
Idle, the negative phase-sequence comprehensive compensation technique of the cophase supply traction substation of compensator transformer.
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 present invention does not change the effective power flow of traction substation, and the nothing of traction substation is solved by reactive power flow control
The comprehensive compensation technique problem of function and negative phase-sequence realizes cophase supply, meanwhile, increase power factor improves feeder voltage, and makes to bear
Sequence administers the requirement that is up to state standards.
Summary of the invention
The cophase supply traction based on single-phase main transformer and T wiring compensator transformer that it is an object of the present invention to provide a kind of
Electric substation is idle, negative phase-sequence comprehensive compensating device and its method, can efficiently solve the idle of cophase supply traction substation generation
The technical issues of with negative phase-sequence real-time compensation.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is specific as follows:
A kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation, the cophase supply traction become
Electricity mainly include three-phase high-voltage bus, the single-phase main transformer being connect with three-phase high-voltage bus, three-phase compensator transformer and
The Traction networks being connect with single-phase main transformer；Three-phase compensator transformer uses the T mode of connection, primary side and three-phase high-voltage bus
A, B, C tri- is connected；Wherein: the comprehensive compensating device includes the first reactive compensation unit, the second reactive compensation unit, third
Reactive compensation unit, the 4th reactive compensation unit and measurement and control unit；First reactive compensation unit is connected to the single-phase master
The secondary side of transformer；Second reactive compensation unit, the third reactive compensation unit and the 4th reactive compensation unit
One end connect respectively with the three-phase compensator transformer, the other end is connect with the measurement and control unit respectively.
Preferably, second reactive compensation unit is connect with the port three-phase compensator transformer secondary side rt, the third without
Function compensating unit is connect with the port three-phase compensator transformer secondary side st, the 4th reactive compensation unit and three-phase compensator transformer
The connection of the port secondary side rs.
Preferably, the comprehensive compensating device further includes measurement and control unit, and the measurement and control unit is mainly by voltage transformer, electricity
Current transformer and controller collectively form；The measurement with voltage transformer, current transformer respectively of the input terminal of the controller
End connection, controller output end respectively with the first reactive compensation unit, the second reactive compensation unit, third reactive compensation unit,
The control terminal of 4th reactive compensation unit connects.
Preferably, the cophase supply traction substation further includes voltage transformer and current transformer, and the voltage is mutual
The primary side of sensor is connected to single-phase main transformer secondary side, and the primary side of current transformer is serially connected on feeder line.
Preferably, the primary side winding of the single-phase main transformer in the three-phase high-voltage bus A phase and B be connected,
Secondary side winding one end of single-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 technical solution adopted in the present invention is specific as follows:
A kind of cophase supply using described in any one of above-mentioned technical proposal based on single-phase transformation and T wiring compensation
The comprehensive compensation method of traction substation comprehensive compensating device, in which: the comprehensive compensation side of the cophase supply traction substation
Method specific steps 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, and Q2=Q3=0, Q4=-kQ1, i.e. reactive power Q1When for capacitive, Q4For
Perception, wherein k≤1, k are real number.
Preferably, work as s-> SεWhen, controller controls the second reactive compensation unit, third reactive compensation unit (SVG3) inhale
Reactive power is received to compensate, wherein Q2And Q3Component size are as follows:
Q4It remains unchanged；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 beneficial effects of the present invention are:
One, the same phase comprehensive compensating device and method generate reactive component and negative sequence component with comprehensive, make power factor,
Feeder voltage and negative phase-sequence obtain comprehensive compensation, realize cophase supply, do not change the effective power flow of traction substation Traction networks, match
The three-phase compensator transformer of set does not transmit positive sequence active power, has the technical advantage for exempting from electrical capacity charge.
Two, the operating condition with phase comprehensive compensating device and method is reversible, when tractive power supply system is in equivalent regeneration regime,
Electric energy up to standard can be still 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 cophase supply comprehensive compensating device described in the embodiment of the present invention one.
Fig. 2 is relational structure schematic diagram between measurement and control unit and reactive compensation unit described in the embodiment of the present invention one.
Fig. 3 is the flow diagram of cophase supply comprehensive compensation method described in the embodiment of the present invention two.
Specific embodiment
In order to be best understood from the invention, working principle of the present invention is briefly explained herein: by being connected to single-phase main transformer
The the first reactive compensation unit compensation traction power factor and feeder voltage of depressor secondary side, make traction power factor and feeder voltage
Reach target call；Using three-phase high-voltage bus as negative phase-sequence examination point up to standard, by the secondary side for being connected to three-phase compensator transformer
4th reactive compensation unit is idle to contribute to correct the excessive idle power output of the first reactive compensation unit, the second reactive compensation list
Member, the idle power output of third reactive compensation unit are electric come the negative phase-sequence for compensating traction load and the joint generation of the first reactive compensation unit
It flows (power), reaches national standard after compensation, wherein the second reactive compensation unit and third reactive compensation unit generate negative phase-sequence tide
Stream, and do not change original effective power flow.The invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment one
As shown in Figure 1, the embodiment of the invention provides a kind of cophase supply based on single-phase transformation and T wiring compensation is comprehensive
Compensation device is set in cophase supply traction substation SS, and the cophase supply traction substation SS mainly includes three-phase height
Pressure 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
The Traction networks OCS of depressor TT connection；The primary side winding of the single-phase main transformer TT and the A phase in the three-phase high-voltage bus HB
It is connected with B, secondary side winding one end ground connection of single-phase main transformer TT, the other end leads to Traction networks OCS connection through feeder line F；Institute
The primary side for stating voltage transformer pt is connected to single-phase main transformer TT secondary side, and the primary side of Current Transmit is serially connected on feeder line F；
Three-phase compensator transformer MT uses the T mode of connection, and primary side is connected with A, B, C tri- of three-phase high-voltage bus HB；Wherein: described
Cophase supply comprehensive compensating device includes the first reactive compensation unit SVG1, the second reactive compensation unit SVG2, third reactive compensation
Cell S VG34th reactive compensation unit SVG4With measurement and control unit MC；The first reactive compensation unit SVG1It is connected to the list
The secondary side of phase main transformer TT,；The second reactive compensation unit SVG2, the third reactive compensation unit SVG3With described
Four reactive compensation unit SVG4One end connect respectively with the three-phase compensator transformer MT, the other end respectively with the observing and controlling
Unit MC connection.
In embodiments of the present invention, the R terminal of the first primary side winding RS of the three-phase compensator transformer MT and S terminal with
The T terminal of the second primary side winding TX of the three-phase compensator transformer MT forms isosceles triangle, wherein the second primary side winding TX
The number of turns n and the first primary side winding RS the number of turns m relationship are as follows:The first time of the three-phase compensator transformer MT
The t terminal of the second secondary side winding tx of the r terminal and s terminal of side winding rs and the three-phase compensator transformer MT form isosceles three
It is angular, wherein the relationship of the number of turns m ' of the number of turns n ' of the second secondary side winding tx and the first secondary side winding rs are as follows: n '=m '/2.
In embodiments of the present invention, the second reactive compensation unit SVG2With the port three-phase compensator transformer MT secondary side rt
Connection, the third reactive compensation unit SVG3It is connect with the port three-phase compensator transformer MT secondary side st, the 4th idle benefit
Repay cell S VG4It is connect with the port three-phase compensator transformer MT secondary side rs.
As shown in Fig. 2, measurement and control unit MC described in the embodiment of the present invention is mainly by voltage transformer pt, Current Transmit
It is collectively formed with controller CD；The measurement with voltage transformer pt, Current Transmit respectively of the input terminal of the controller CD
End connection, controller CD output end respectively with the first reactive compensation unit SVG1, the second reactive compensation unit SVG2, third is idle
Compensating unit SVG2, the 4th reactive compensation unit SVG4Control terminal connection.
Embodiment two
As shown in figure 3, the embodiment of the invention provides a kind of cophase supply based on single-phase transformation and T wiring compensation is comprehensive
Compensation method, the cophase supply comprehensive compensation method is specially step:
(1) negative phase-sequence for setting three-phase high-voltage bus HB allows capacity as Sε；
(2) voltage and current that controller CD is measured respectively first with t moment voltage transformer pt and Current Transmit
It calculates and power s and its power factor (is regarded) as cos φ, further according to Target Towing load function by the traction load of feeder line F
Rate factor or target feeder voltage are to the first reactive compensation unit SVG1Absorbing reactive power Q1It is controlled and is compensated, and Q1Hold
Property 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 bus HBεBetween size
Relationship, then the second reactive compensation unit SVG is controlled by controller CD2, third reactive compensation unit SVG3, the 4th reactive compensation
Cell S VG4Absorbing reactive power compensates, wherein the second reactive compensation unit SVG2, third reactive compensation unit SVG3、
4th reactive compensation unit SVG4Absorbing reactive power be respectively Q2、Q3、Q4。
In embodiments of the present invention, work as s-≤SεWhen, then controller CD controls the second reactive compensation unit SVG2, third without
Function compensating unit SVG3, the 4th reactive compensation unit SVG4Absorbing reactive power compensates, and Q2=Q3=0, Q4=-kQ1,
That is reactive power Q1When for capacitive, Q4For perception, wherein k≤1, k are real number.
In embodiments of the present invention, work as s-> SεWhen, controller CD controls the second reactive compensation unit SVG2, third is idle
Compensating unit SVG3Absorbing reactive power compensates, wherein when feeder line F is in traction working condition, then Q2Component be sense
Property, Q3Component be capacitive；When feeder line F is in regeneration regime, then Q2Component be capacitive, Q3Component be perception.Q2And Q3
Component size are as follows:Q4It remains unchanged；Wherein set
Claims (10)
1. a kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation, is set to cophase supply traction and becomes
In electric institute (SS), the cophase supply traction substation (SS) mainly includes three-phase high-voltage bus (HB) and three-phase high-voltage bus
(HB) single-phase main transformer (TT), three-phase compensator transformer (MT) and the traction being connect with single-phase main transformer (TT) connected
Net (OCS)；Three-phase compensator transformer (MT) uses the T mode of connection, and primary side is connected with A, B, C tri- of three-phase high-voltage bus (HB)
It connects；It is characterized by: the comprehensive compensating device includes the first reactive compensation unit (SVG1), the second reactive compensation unit
(SVG2), third reactive compensation unit (SVG3), the 4th reactive compensation unit (SVG4) and measurement and control unit (MC)；First nothing
Function compensating unit (SVG1) it is connected to the secondary side of the single-phase main transformer (TT)；Second reactive compensation unit (the SVG2), institute
State third reactive compensation unit (SVG3) and the 4th reactive compensation unit (SVG4) one end respectively with the three-phase compensate become
Depressor (MT) connection, the other end are connect with the measurement and control unit (MC) respectively.
2. a kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation according to claim 1,
It is characterized in that: the second reactive compensation unit (SVG2) connect with the port three-phase compensator transformer (MT) secondary side rt, described
Three reactive compensation unit (SVG3) connect with the port three-phase compensator transformer (MT) secondary side st, the 4th reactive compensation unit
(SVG4) connect with the port three-phase compensator transformer (MT) secondary side rs.
3. a kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation according to claim 1,
Be characterized in that: the measurement and control unit (MC) is mainly common by voltage transformer (PT), current transformer (CT) and controller (CD)
It constitutes；The input terminal of the controller (CD) is connect with the measurement end of voltage transformer (PT), current transformer (CT) respectively, 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 (SVG4) control terminal connection.
4. a kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation according to claim 3,
Be characterized in that: the primary side of the voltage transformer (PT) is connected to single-phase main transformer (TT) secondary side, current transformer (CT)
Primary side is serially connected on feeder line (F).
5. a kind of cophase supply comprehensive compensating device based on single-phase transformation and T wiring compensation according to claim 1,
Be characterized in that: the primary side winding of the single-phase main transformer (TT) in the three-phase high-voltage bus (HB) A phase and B be connected
It connects, secondary side winding one end ground connection of single-phase main transformer (TT), the other end leads to Traction networks (OCS) through feeder line (F) and connects.
6. a kind of cophase supply using described in any one of the claims 1 to 5 based on single-phase transformation and T wiring compensation
The comprehensive compensation method of electric comprehensive compensating device, it is characterised in that: the cophase supply comprehensive compensation method specific steps are as follows:
(1) negative phase-sequence for setting three-phase high-voltage bus (HB) allows capacity as Sε；
(2) voltage and electricity that controller (CD) measures respectively first with t moment voltage transformer (PT) and current transformer (CT)
It is cos φ that flowmeter, which is calculated through the traction load power s and its power factor of feeder line (F), further according to Target Towing load power
Factor or target feeder voltage are to the first reactive compensation unit (SVG1) absorbing reactive power Q1It is controlled and is compensated, and Q1Hold
Property 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 bus (HB)εBetween size close
System, then the second reactive compensation unit (SVG is controlled by controller (CD)2), third reactive compensation unit (SVG3), it is the 4th idle
Compensating unit (SVG4) absorbing reactive power compensates, wherein the second reactive compensation unit (SVG2), third reactive compensation list
Member (SVG3), the 4th reactive compensation unit (SVG4) absorbing reactive power be respectively Q2、Q3、Q4。
7. a kind of cophase supply comprehensive compensation method based on single-phase transformation and T wiring compensation according to claim 6,
It is characterized in that: working as s-≤SεWhen, then controller (CD) controls the second reactive compensation unit (SVG2), third reactive compensation unit
(SVG3), the 4th reactive compensation unit (SVG4) absorbing reactive power compensates, and Q2=Q3=0, Q4=-kQ1, i.e., idle
Power Q1When for capacitive, Q4For perception, wherein k≤1, k are real number.
8. a kind of cophase supply comprehensive compensation method based on single-phase transformation and T wiring compensation according to claim 6,
It is characterized in that: working as s-> SεWhen, controller (CD) controls the second reactive compensation unit (SVG2), third reactive compensation unit
(SVG3) absorbing reactive power compensates, wherein Q2And Q3Component size are as follows:
Q4It remains unchanged；Wherein set
9. a kind of cophase supply comprehensive compensation method based on single-phase transformation and T wiring compensation according to claim 8,
It is characterized in that: when feeder line (F) is in traction working condition, then Q2Component be perception, Q3Component be capacitive.
10. a kind of cophase supply comprehensive compensation method based on single-phase transformation and T wiring compensation according to claim 8,
It is characterized by: when feeder line (F) is in regeneration regime, then Q2Component be capacitive, Q3Component be perception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811381548.XA CN109510212B (en) | 2018-11-20 | 2018-11-20 | In-phase power supply comprehensive compensation device and method based on single-phase transformation and T-connection compensation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811381548.XA CN109510212B (en) | 2018-11-20 | 2018-11-20 | In-phase power supply comprehensive compensation device and method based on single-phase transformation and T-connection compensation |
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| CN109510212B CN109510212B (en) | 2024-01-16 |
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| 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 |
| CN113489006A (en) * | 2021-07-30 | 2021-10-08 | 盾石磁能科技有限责任公司 | Energy management device in traction power supply system and traction power supply system |
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| CN109510212B (en) | 2024-01-16 |
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