CN109617044A - A kind of electrified railway in-phase power supply system based on V/V wiring - Google Patents
A kind of electrified railway in-phase power supply system based on V/V wiring Download PDFInfo
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- CN109617044A CN109617044A CN201811388696.4A CN201811388696A CN109617044A CN 109617044 A CN109617044 A CN 109617044A CN 201811388696 A CN201811388696 A CN 201811388696A CN 109617044 A CN109617044 A CN 109617044A
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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
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02E40/40—Arrangements for reducing harmonics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a kind of electrified railway in-phase power supply systems based on V/V wiring, are related to attached wires of AC electrified railway power supply technique field.The cophase supply system includes three-phase high-voltage bus, tractive transformer, three-phase compensator transformer and three-phase compensation device, coordinated control unit, wherein the primary side of tractive transformer is connected with the A phase of three-phase high-voltage bus, B；First primary side of three-phase compensator transformer and the secondary side of tractive transformer connect, and the second primary side of three-phase compensator transformer is connected with the B phase of three-phase high-voltage bus, C；The primary side of three-phase compensation device is connect with the secondary side of three-phase compensator transformer, and coordinated control unit is connect with the secondary side of three-phase compensation device.Therefore, the present invention is not only able to achieve the cophase supply of railway all fronts and cancels electric split-phase, the Technological Economy for also effectively realizing electrified railway in-phase power supply optimizes, while being able to solve the power quality problem caused by electric railway electric locomotive load based on three-phase system negative phase-sequence.
Description
Technical field
The present invention relates to attached wires of AC electrified railway for electrical domain more particularly to a kind of electric railway based on V/V wiring
Cophase supply system.
Background technique
China's electric railway generallys use single phase industrial frequency AC system, to make single-phase traction load in three-phase electrical power system
In balance as far as possible, electric railway often uses the scheme of rotation phase sequence, split-phase switched-mode power supply.Adjacent confession at split-phase subregion
Electric section just forms neutral section insulator, referred to as electric split-phase or split-phase.To prevent electric locomotive from charging logical phase splitting due to arcing
Burn out overhead contact line component, even result in the accidents such as phase fault, with the continuous raising of train speed, driver can not hand
It is dynamic to carry out moving back grade, pass auxiliary unit, disconnected main circuit breaker, cross neutral section, again co-host break road device, conjunction auxiliary machine by train inertia
Group in the case where completing split-phase, uses automatic passing over of neutral section technology into level restoration traction power, mainly have floor switches from
It is dynamic switched split-phase, automatic passing over of neutral section etc. is several on vehicle-mounted automatic passing over of neutral section and column, but that there are still trains in switching is logical
The electrical process of the transient state of phase splitting, is also easy to produce biggish switching overvoltage or overcurrent, and Traction networks and mobile unit is caused to burn
The accidents such as damage, influence power supply reliability and safe train operation.Therefore, electric split-phase link is most thin in entire tractive power supply system
Weak link, train excessively mutually become the bottleneck of high-speed railway or even the power supply of entire electric railway traction.
The high-power cross-straight-intersection type electricity based on the full control property device such as IGBT, IGCT has been widely used in high speed and heavy haul railway
Power locomotive or EMU, core are the traction convertors of multiple groups four-quadrant PWM control and multiplex control, in actual operation
Harmonic content is small, and power factor is close to 1, but the electric locomotive of cross-straight-intersection type or EMU traction power are big, such as big marshalling operation
Its rated power of bicycle high-speed EMUs up to 25MW (quite general fast railway 5 train), these high-power single-phases largely started
The power quality problem based on non-equilibrium among three phase voltages (negative phase-sequence) that load is got worse caused by three phase network cannot
It is not taken seriously.
Theory and practice shows to supply cancelling traction substation exit electricity split-phase, eliminating using cophase supply technology
While storage battery neck, moreover it is possible to effectively administer negative-sequence current, reach the electric energy based on non-equilibrium among three phase voltages (negative phase-sequence) limit value
Quality requirement may advantageously facilitate the harmonious development of electric power and railway.
Summary of the invention
It is an object of the present invention to provide a kind of electrified railway in-phase power supply systems based on V/V wiring, are not only able to achieve
The cophase supply of railway all fronts and the electric split-phase of cancellation, also effectively realize the Technological Economy optimization of electrified railway in-phase power supply,
Meanwhile, it is capable to solve the power quality problem caused by electric railway electric locomotive load based on three-phase system negative phase-sequence.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is specific as follows:
A kind of electrified railway in-phase power supply system based on V/V wiring, the cophase supply system includes for providing
The three-phase high-voltage bus of the electric system of cophase supply system, for by the line voltage pick-up of electric system to Traction networks bus
Tractive transformer is compensated for compensating and administering electric locomotive load bring negative sequence power and the unbalanced three-phase of three phase network
Transformer and three-phase compensation device, the negative sequence power for calculating Traction networks bus and transmitting to the three-phase compensation device is believed
The coordinated control unit of breath；Wherein, the primary side of the tractive transformer is connected with the A phase of the three-phase high-voltage bus, B；Institute
The first primary side for stating three-phase compensator transformer is connect with the secondary side of the tractive transformer, and the second of the three-phase compensator transformer
Primary side is connected with the B phase of the three-phase high-voltage bus, C；The primary side of the three-phase compensation device and the three-phase compensate transformation
The secondary side of device connects, and the coordinated control unit is connect with the secondary side of the three-phase compensation device.
Preferably, the three-phase compensation device include the first compensating unit, the second compensating unit ... and N compensation
Unit；First compensating unit, the second compensating unit ... and N compensating unit is parallel with one another.
It is further preferred that the coordinated control unit includes that first voltage mutual inductor, second voltage mutual inductor, electric current are mutual
Sensor and controller；The input terminal of the controller respectively with the measurement end of the first voltage mutual inductor, the second voltage
The measurement end of mutual inductor, the connection of the measurement end of the current transformer, the controller output end are compensated with described first respectively
Unit, the second compensating unit ... and N compensating unit control terminal connection.
It is further preferred that the first voltage mutual inductor is connected to the A phase and B phase of the three-phase high-voltage bus, institute
State B phase and C phase that second voltage mutual inductor is connected to the three-phase high-voltage bus.
Specifically, secondary side one end of the tractive transformer leads to Traction networks bus by the current transformer, secondly
The side other end is grounded by rail.
Preferably, first compensating unit, the second compensating unit ... and to be that three intersections are straight become N compensating unit
Flow device.
Preferably, the tractive transformer is single-phase wiring transformer.
Preferably, the three-phase compensator transformer is V/V wiring transformer.
Preferably, the voltage change ratio of the tractive transformer is K1, the first primary side winding of the three-phase compensator transformer
Voltage change ratio be K2, the voltage change ratio of the second primary side winding of the three-phase compensator transformer is K3, wherein K1、K2、K3Three
Between voltage change ratio relationship are as follows: K3=K1×K2。
Compared with prior art, the beneficial effects of the present invention are:
One, three-phase compensation device only generates negative sequence component in system of the present invention, can administer electrical network negative phase-sequence with full
Sufficient non-equilibrium among three phase voltages, the effective power flow without changing traction substation Traction networks；
Two, the present invention is proposed to be compensated by single-phase traction transformer, the three-phase compensator transformer of V/V wiring and three-phase negative/positive and be filled
The novel combination set improves the flexibility of traction substation operation, can cancel the electric split-phase ring in traction substation exit
Section.
Three, the present invention on the basis of power supply using single-phase traction transformer, can increase three-phase compensator transformer existing
With three-phase compensation device, structure is simple, superior performance, it is easy to accomplish.
Four, three-phase compensation device of the present invention can parallel running by measure, be easy to the extension of compensation capacity.
Five, the present invention can save Multiple coil matching transformer complicated in former cophase supply system, escapable cost.
Six, the three-phase compensation device in the present invention substitutes the back-to-back converter in former cophase supply system, can save into
This.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the electrified railway in-phase power supply system described in the embodiment of the present invention based on V/V wiring.
Fig. 2 is relational structure schematic diagram between coordinated control unit and three-phase compensation device described in the embodiment of the present invention.
Specific embodiment
In order to be best understood from the invention, present invention work is further retouched with reference to the accompanying drawings and detailed description
It states.
As depicted in figs. 1 and 2, the embodiment of the invention provides a kind of electrified railway in-phase power supplies based on V/V wiring
System, the cophase supply system include three-phase high-voltage bus HB for providing the electric system of cophase supply system, are used for
By the tractive transformer TT of the line voltage pick-up of electric system to Traction networks bus OCS, it is used to compensate and administer electric locomotive and bears
The negative sequence power and three phase network brought unbalanced three-phase compensator transformer MT and three-phase compensation device NC, it is led for calculating
Draw the negative sequence power of net bus OCS and the coordinated control unit MC to three-phase compensation device NC transmission information；Wherein, institute
The primary side for stating tractive transformer TT is connected with the A phase of the three-phase high-voltage bus HB, B；The three-phase compensator transformer MT's
First primary side is connect with the secondary side of the tractive transformer TT, the second primary side of the three-phase compensator transformer MT and the three-phase
The B phase of high voltage bus HB, C are connected；The secondary side of the primary side of the three-phase compensation device NC and the three-phase compensator transformer MT
Connection, the coordinated control unit MC are connect with the secondary side of the three-phase compensation device NC.It is described in embodiments of the present invention to lead
Drawing transformer TT is single-phase wiring transformer, and the three-phase compensator transformer MT is V/V wiring transformer.
In embodiments of the present invention, the voltage change ratio of the tractive transformer TT is K1, the three-phase compensator transformer MT
The first primary side winding voltage change ratio be K2, the voltage change ratio of the second primary side winding of the three-phase compensator transformer MT is K3,
Wherein K1、K2、K3Voltage change ratio relationship between three are as follows: K3=K1×K2。
In embodiments of the present invention, the three-phase compensation device NC includes the first compensating unit AD1, the second compensating unit
AD2... and N compensating unit ADn, wherein n is equal to N；The first compensating unit AD1, the second compensating unit
AD2... and N compensating unit ADnIt is parallel with one another.The first compensating unit AD in embodiments of the present invention1, second mend
Repay unit AD2... and N compensating unit ADnFor the three straight current transformers of intersection.In embodiments of the present invention, N is equal to n, and
For positive integer.
As shown in connection with fig. 2, the coordinated control unit MC includes first voltage mutual inductor PT1, second voltage mutual inductor PT2、
Current Transmit and controller CC；The input terminal of the controller CC respectively with the first voltage mutual inductor PT1Measurement
End, the second voltage mutual inductor PT2Measurement end, the connection of the measurement end of the Current Transmit, the controller CC is defeated
Outlet respectively with the first compensating unit AD1, the second compensating unit AD2... and N compensating unit ADnControl terminal
Connection.
Continue as depicted in figs. 1 and 2, the first voltage mutual inductor PT1It is connected to the A phase of the three-phase high-voltage bus HB
With B phase, the second voltage mutual inductor PT2It is connected to the B phase and C phase of the three-phase high-voltage bus HB.The tractive transformer
Secondary side one end of TT leads to Traction networks bus OCS by the Current Transmit, and the secondary side other end is grounded by rail R.
Therefore, tractive transformer TT of the cophase supply system of the present invention using single-phase wiring and three using VV wiring
Phase compensator transformer MT, the first primary side of the three-phase compensator transformer MT are connect with the secondary side of the tractive transformer TT, institute
The second primary side for stating three-phase compensator transformer MT is connected with the B phase of the three-phase high-voltage bus HB, C；The three-phase compensation dress
The exchange side for setting NC is connect with the secondary side of the three-phase compensator transformer MT, and wherein three-phase compensation device NC is straight by N number of three intersection
Current transformer parallel connection is constituted；The tractive transformer is Traction networks bus OCS power supply, and coordinated control unit MC calculates Traction networks bus
The negative sequence power of OCS is then transferred to three-phase compensation device NC, three-phase compensator transformer MT and three-phase compensation device NC and is used to mend
It repays and administers electric locomotive single-phase load bring negative sequence power and unbalanced source voltage.When necessary, three-phase compensation device NC
Reactive power needed for traction load can also be provided and harmonic compensation current.
Three-phase compensator transformer MT and three-phase compensation device NC is used to compensate improvement electric locomotive in embodiments of the present invention
Single-phase load bring negative sequence power and the comprehensive compensation method specific steps of unbalanced source voltage are described as follows:
1) coordinated control unit first reads the first voltage mutual inductor PT on three-phase high-voltage bus1Voltage value and second electricity
Press mutual inductor PT2Voltage value and Current Transmit current value, then calculate the voltage of three-phase high-voltage bus
With tractive load electric currentThe active-power P on traction bus is calculated finally by instantaneous power theoryLAnd reactive power QL(2)
The negative-sequence current component and forward-order current reactive component introduced on three-phase high-voltage bus in order to compensate for traction load is based on wink
When Power Theory and by be fully compensated condition, i.e., three-phase compensation device be fully compensated negative-sequence current component and forward-order current it is idle
Component, power supply only provide the active power of traction load, can obtain the active-power P of three-phase high-voltage bus point of incoming cablesHB=PL, idle
Power QHB=0, in conjunction with the voltage of three-phase high-voltage busThe total current of three-phase high-voltage bus point of incoming cables can be calculated (3) electric current on bus will be drawnConverting can obtain on three-phase high-voltage bus(4) according to base
That Hough current law, the total current of three-phase high-voltage bus point of incoming cables subtract the electric current reduced value on traction busIt can obtain
The electric current (conversion to three-phase high-voltage side) for needing to compensate to three-phase compensation device, wherein(4) due to the original of single-phase traction transformer and VV wiring compensator transformer
Side secondary current phase is identical, and the electric current that three-phase compensation device needs compensate isIt (5) will according to instantaneous power theoryIt is converted to the negative-sequence current and positive sequence active component that three-phase compensation device needs to compensate.It (6) will conversion
At the three-phase compensation device NC negative-sequence current for needing to compensate and positive sequence active component with compensating unit in three-phase compensation device NC
Quantity is divided into the current-order of every compensating unit, and passes to every compensating unit.(7) when every compensating unit is received
When current-order is greater than the maximum capacity corresponding current of every compensating unit, every compensating unit is run by its maximum capacity.
In conclusion cophase supply system of the present invention is able to achieve the cophase supply of railway all fronts without split-phase, guarantee
The high speed of locomotive, heavy service；Meanwhile the system can eliminate rail traction load to the negative phase-sequence of utility network electric energy, it is idle and
Harmonic wave influences.Since three-phase compensator transformer of the present invention intersects straight current transformer connection type with multiple three, be conducive to
It reduces cost and facilitates implementation.
Claims (9)
1. a kind of electrified railway in-phase power supply system based on V/V wiring, which is characterized in that the cophase supply system includes
For provide the electric system of cophase supply system three-phase high-voltage bus (HB), for by the line voltage pick-up of electric system extremely
The tractive transformer (TT) of Traction networks bus (OCS) loads bring negative sequence power and three for compensating and administering electric locomotive
The three-phase compensator transformer (MT) and three-phase compensation device (NC) of phase unbalanced power supply, for calculating Traction networks bus (OCS)
Negative sequence power and the coordinated control unit (MC) that information is transmitted to the three-phase compensation device (NC)；Wherein, the traction becomes
The primary side of depressor (TT) is connected with the A phase of the three-phase high-voltage bus (HB), B；The of the three-phase compensator transformer (MT)
One primary side is connect with the secondary side of the tractive transformer (TT), the second primary side and described three of the three-phase compensator transformer (MT)
The B phase of phase high voltage bus (HB), C are connected；The primary side of the three-phase compensation device (NC) and the three-phase compensator transformer
(MT) secondary side connection, the coordinated control unit (MC) connect with the secondary side of the three-phase compensation device (NC).
2. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 1, which is characterized in that
The three-phase compensation device (NC) includes the first compensating unit (AD1), the second compensating unit (AD2) ... and N compensation is single
Member (ADn)；First compensating unit (the AD1), the second compensating unit (AD2) ... and N compensating unit (ADn) mutually
It is in parallel.
3. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 2, which is characterized in that
The coordinated control unit (MC) includes first voltage mutual inductor (PT1), second voltage mutual inductor (PT2), current transformer (CT)
With controller (CC)；The input terminal of the controller (CC) respectively with the first voltage mutual inductor (PT1) measurement end, described
Second voltage mutual inductor (PT2) measurement end, the connection of the measurement end of the current transformer (CT), the controller (CC) output
End respectively with the first compensating unit (AD1), the second compensating unit (AD2) ... and N compensating unit (ADn) control
End connection processed.
4. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 3, which is characterized in that
First voltage mutual inductor (the PT1) it is connected to the A phase and B phase of the three-phase high-voltage bus (HB), the second voltage mutual inductance
Device (PT2) it is connected to the B phase and C phase of the three-phase high-voltage bus (HB).
5. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 3, which is characterized in that
Secondary side one end of the tractive transformer (TT) leads to Traction networks bus (OCS), secondary side by the current transformer (CT)
The other end is grounded by rail (R).
6. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 2, which is characterized in that
First compensating unit (the AD1), the second compensating unit (AD2) ... and N compensating unit (ADn) it is the straight change of three intersections
Flow device.
7. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 1, which is characterized in that
The tractive transformer (TT) is single-phase wiring transformer.
8. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 1, which is characterized in that
The three-phase compensation becomes V/V wiring transformer.
9. a kind of electrified railway in-phase power supply system based on V/V wiring according to claim 1, which is characterized in that
The voltage change ratio of the tractive transformer (TT) is K1, the voltage change of the first primary side winding of the three-phase compensator transformer (MT)
Than for K2, the voltage change ratio of the second primary side winding of the three-phase compensator transformer (MT) is K3, wherein K1、K2、K3Between three
Voltage change ratio relationship are as follows: K3=K1×K2。
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| CN201811388696.4A CN109617044B (en) | 2018-11-20 | 2018-11-20 | Electrified railway in-phase power supply system based on V/V wiring |
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| CN109936135A (en) * | 2019-04-24 | 2019-06-25 | 西南交通大学 | A kind of electric railway is constructed with phase energy storage for power supply and its control method |
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| CN110752609A (en) * | 2019-10-24 | 2020-02-04 | 成都国佳电气工程有限公司 | Multi-station cooperative unbalance compensation method for high-speed railway |
| CN111835007A (en) * | 2019-04-18 | 2020-10-27 | 台达电子企业管理（上海）有限公司 | Charging device and charging control method |
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| US11742688B2 (en) | 2019-04-18 | 2023-08-29 | Delta Electronics (Shanghai) Co., Ltd. | Charging device and charging control method |
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