CN209344779U - A kind of electrified railway in-phase power supply system based on VV wiring - Google Patents
A kind of electrified railway in-phase power supply system based on VV wiring Download PDFInfo
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- CN209344779U CN209344779U CN201821916881.1U CN201821916881U CN209344779U CN 209344779 U CN209344779 U CN 209344779U CN 201821916881 U CN201821916881 U CN 201821916881U CN 209344779 U CN209344779 U CN 209344779U
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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
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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 electrified railway in-phase power supply systems based on VV 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, three-phase compensation device and tuning controller, 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 tuning controller is connect with the secondary side of three-phase compensation device.Therefore, the utility model 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, 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.
Description
Technical field
The utility model relates to attached wires of AC electrified railway for electrical domain more particularly to a kind of electrified iron based on VV wiring
Road 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.
Utility model content
The utility model aim, can not only be real there is provided a kind of electrified railway in-phase power supply system based on VV wiring
Show the cophase supply of railway all fronts and cancel electric split-phase, the Technological Economy for also effectively realizing electrified railway in-phase power supply is optimal
Change, 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, technical solution used by the utility model is specific as follows:
A kind of electrified railway in-phase power supply system based on VV wiring, the cophase supply system include same for providing
The three-phase high-voltage bus of the electric system of phase power supply system, for by line voltage pick-up the leading to Traction networks bus of electric system
Draw transformer, become for compensating and administering electric locomotive load bring negative sequence power and the unbalanced three-phase compensation of three phase network
Depressor and three-phase compensation device, the negative sequence power for calculating Traction networks bus and information is transmitted to the three-phase compensation device
Tuning controller；Wherein, the primary side of the tractive transformer is connected with the A phase of the three-phase high-voltage bus, B；Described three
First primary side of phase compensator transformer is connect with the secondary side of the tractive transformer, the second primary side of the three-phase compensator transformer
It 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 compensator transformer
Secondary side connection, the tuning controller are connect with the secondary side of the three-phase compensation device.
Preferably, the three-phase compensation device include the first compensated current transformer, the second compensated current transformer ... and N
Compensated current transformer；First compensated current transformer, the second compensated current transformer ... and N compensated current transformer is parallel with one another.
It is further preferred that the tuning controller includes first voltage mutual inductor, second voltage mutual inductor, Current Mutual Inductance
Device and controller；The input terminal of the controller is mutual with the measurement end of the first voltage mutual inductor, the second voltage respectively
The measurement end of sensor, the connection of the measurement end of the current transformer, the controller output end become with first compensation respectively
Flow device, the second compensated current transformer ... and N compensated current transformer 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 compensated current transformer, the second compensated current transformer ... and N compensated current transformer be three-phase
Hand over straight current transformer.
Preferably, the tractive transformer is single-phase wiring transformer.
Preferably, the three-phase compensator transformer is VV 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 utility model has the beneficial effects that
One, three-phase compensation device only generates negative sequence component in system described in the utility model, can administer electrical network negative phase-sequence
Effective power flow to meet non-equilibrium among three phase voltages, without changing traction substation Traction networks；
Two, the utility model proposes the three-phase compensator transformers and three-phase negative/positive benefit by single-phase traction transformer, VV wiring
The novel combination for repaying device improves the flexibility of traction substation operation, can cancel the electricity point in traction substation exit
Phase link.
Three, the utility model can be increased three-phase compensation and become existing on the basis of power supply using single-phase traction transformer
Depressor and three-phase compensation device, structure is simple, superior performance, it is easy to accomplish.
Four, three-phase compensation device described in the utility model can parallel running by measure, be easy to the extension of compensation capacity.
Five, the utility model can save Multiple coil matching transformer complicated in former cophase supply system, escapable cost.
Six, the three-phase compensation device in the utility model substitutes the back-to-back converter in former cophase supply system, can save
Cost-saving.
Detailed description of the invention
Fig. 1 is the structural representation of the electrified railway in-phase power supply system described in the utility model embodiment based on VV wiring
Figure.
Fig. 2 is relational structure schematic diagram between tuning controller described in the utility model embodiment and three-phase compensation device.
Specific embodiment
In order to be best understood from the utility model create, with reference to the accompanying drawings and detailed description to the utility model make into
The description of one step.
As depicted in figs. 1 and 2, the utility model embodiment provides a kind of electric railway cophase supply based on VV wiring
Electric system, the cophase supply system include three-phase high-voltage bus HB for providing the electric system of cophase supply system, use
In by the tractive transformer TT of the line voltage pick-up of electric system to Traction networks bus OCS, be used to compensate and administer electric locomotive
Load bring negative sequence power and three phase network unbalanced three-phase compensator transformer MT and three-phase compensation device NC, for calculating
The negative sequence power of Traction networks bus OCS and the tuning controller MC that information is transmitted to the three-phase compensation device NC；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 tuning controller MC are connect with the secondary side of the three-phase compensation device NC.Described in the utility model embodiment
Tractive transformer TT is single-phase wiring transformer, and the three-phase compensator transformer MT is VV wiring transformer.
In the utility model embodiment, the voltage change ratio of the tractive transformer TT is K1, the three-phase compensation transformation
The voltage change ratio of the first primary side winding of device MT is K2, the voltage change of the second primary side winding of the three-phase compensator transformer MT
Than for K3, wherein K1、K2、K3Voltage change ratio relationship between three are as follows: K3=K1×K2。
In the utility model embodiment, the three-phase compensation device NC includes the first compensated current transformer AD1, second compensation
Current transformer AD2... and N compensated current transformer ADn, wherein n is equal to N；The first compensated current transformer AD1, second compensation
Current transformer AD2... and N compensated current transformer ADnIt is parallel with one another.The first compensation described in the utility model embodiment becomes
Flow device AD1, the second compensated current transformer AD2... and N compensated current transformer ADnFor the three straight current transformers of intersection.It is practical new at this
In type embodiment, N is equal to n, and is positive integer.
As shown in connection with fig. 2, the tuning controller MC includes first voltage mutual inductor PT1, second voltage mutual inductor PT2, electricity
Current transformer CT 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, controller CC output
End respectively with the first compensated current transformer AD1, the second compensated current transformer AD2... and N compensated current transformer ADnControl
End connection processed.
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, cophase supply system described in the utility model is using the tractive transformer TT of single-phase wiring and using VV wiring
Three-phase compensator transformer MT, the three-phase compensator transformer MT the first primary side and the tractive transformer TT secondary side connect
It connects, the second primary side of the three-phase compensator transformer MT is connected with the B phase of the three-phase high-voltage bus HB, C；The three-phase is mended
The exchange side for repaying device NC is connect with the secondary side of the three-phase compensator transformer MT, and wherein three-phase compensation device NC is by N three-phase
Straight current transformer parallel connection is handed over to constitute；The tractive transformer is Traction networks bus OCS power supply, and it is female that tuning controller MC calculates Traction networks
The negative sequence power of line 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
Electric locomotive single-phase load bring negative sequence power and unbalanced source voltage are administered in compensation.When necessary, three-phase compensation device
Reactive power needed for traction load can also be provided in NC and harmonic compensation current.
Three-phase compensator transformer MT and three-phase compensation device NC is used to compensate improvement electric power in the utility model embodiment
Locomotive single-phase load bring negative sequence power and the comprehensive compensation method specific steps of unbalanced source voltage are described as follows:
1) tuning controller first reads the first voltage mutual inductor PT on three-phase high-voltage bus1Voltage value and second voltage
Mutual inductor PT2Voltage value and Current Transmit current value, then calculate the voltage of three-phase high-voltage busWith
Tractive load electric currentThe active-power P on traction bus is calculated finally by instantaneous power theoryLAnd reactive power QL(2) it is
The negative-sequence current component and forward-order current reactive component that compensation traction load introduces on three-phase high-voltage bus, based on instantaneous
Power Theory simultaneously presses the condition being fully compensated, i.e. negative-sequence current component and idle point of forward-order current is fully compensated in three-phase compensation device
Amount, 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 function
Rate 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 single-phase traction transformer and VV wiring compensator transformer
Primary 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.(6) it will be converted to
The negative-sequence current and positive sequence active component that three-phase compensation device NC needs to compensate are with compensated current transformer in three-phase compensation device NC
Quantity is divided into the current-order of every compensated current transformer, and passes to every compensated current transformer.(7) when every compensated current transformer
When received current-order is greater than the maximum capacity corresponding current of every compensated current transformer, every compensated current transformer is held by its maximum
Amount operation.
In conclusion cophase supply system described in the utility model is able to achieve the cophase supply of railway all fronts without split-phase,
Guarantee high speed, the heavy service of locomotive；Meanwhile the system can eliminate negative phase-sequence, nothing of the rail traction load to utility network electric energy
Function harmony wave action.The three-phase compensator transformer as used by the utility model intersects straight current transformer connection side with multiple three
Formula advantageously reduces cost and facilitates implementation.
Claims (9)
1. a kind of electrified railway in-phase power supply system based on VV wiring, which is characterized in that the cophase supply system includes
Three-phase high-voltage bus (HB), tractive transformer (TT), three-phase compensator transformer (MT), three-phase compensation device (NC), coordinated control
Device (MC)；Wherein, the primary side of the tractive transformer (TT) is connected with the A phase of the three-phase high-voltage bus (HB), B；It is described
First primary side of three-phase compensator transformer (MT) is connect with the secondary side of the tractive transformer (TT), the three-phase compensator transformer
(MT) the second primary side is connected with the B phase of the three-phase high-voltage bus (HB), C；The primary side of the three-phase compensation device (NC)
It is connect with the secondary side of the three-phase compensator transformer (MT), the tuning controller (MC) and the three-phase compensation device (NC)
Secondary side connection.
2. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 1, which is characterized in that institute
Stating three-phase compensation device (NC) includes the first compensated current transformer (AD1), the second compensated current transformer (AD2) ... and N compensation
Current transformer (ADn)；First compensated current transformer (the AD1), the second compensated current transformer (AD2) ... and N compensated current transformer
(ADn) parallel with one another.
3. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 2, which is characterized in that institute
Stating tuning controller (MC) includes first voltage mutual inductor (PT1), second voltage mutual inductor (PT2), current transformer (CT) and control
Device (CC) processed；The input terminal of the controller (CC) respectively with the first voltage mutual inductor (PT1) measurement end, described second
Voltage transformer (PT2) measurement end, the connection of the measurement end of the current transformer (CT), controller (CC) output end point
Not with the first compensated current transformer (AD1), the second compensated current transformer (AD2) ... and N compensated current transformer (ADn)
Control terminal connection.
4. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 3, which is characterized in that institute
State first voltage mutual inductor (PT1) it is connected to the A phase and B phase of the three-phase high-voltage bus (HB), the second voltage mutual inductor
(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 VV wiring according to claim 3, which is characterized in that institute
The secondary side one end for stating tractive transformer (TT) leads to Traction networks bus (OCS) by the current transformer (CT), and secondary side is another
One end is grounded by rail (R).
6. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 2, which is characterized in that institute
State the first compensated current transformer (AD1), the second compensated current transformer (AD2) ... and N compensated current transformer (ADn) it is three intersections
Straight current transformer.
7. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 1, which is characterized in that institute
Stating tractive transformer (TT) is single-phase wiring transformer.
8. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 1, which is characterized in that institute
It states three-phase compensation and becomes VV wiring transformer.
9. a kind of electrified railway in-phase power supply system based on VV wiring according to claim 1, which is characterized in that institute
The voltage change ratio for stating tractive transformer (TT) is K1, the voltage change ratio of the first primary side winding of the three-phase compensator transformer (MT)
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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821916881.1U CN209344779U (en) | 2018-11-20 | 2018-11-20 | A kind of electrified railway in-phase power supply system based on VV wiring |
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| CN201821916881.1U CN209344779U (en) | 2018-11-20 | 2018-11-20 | A kind of electrified railway in-phase power supply system based on VV wiring |
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| CN209344779U true CN209344779U (en) | 2019-09-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617044A (en) * | 2018-11-20 | 2019-04-12 | 成都尚华电气有限公司 | A kind of electrified railway in-phase power supply system based on V/V wiring |
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2018
- 2018-11-20 CN CN201821916881.1U patent/CN209344779U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617044A (en) * | 2018-11-20 | 2019-04-12 | 成都尚华电气有限公司 | A kind of electrified railway in-phase power supply system based on V/V wiring |
| CN109617044B (en) * | 2018-11-20 | 2024-02-06 | 成都尚华电气有限公司 | Electrified railway in-phase power supply system based on V/V wiring |
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