CN107953803A - Flexible direct current tractive power supply system and its control method are pressed in one kind - Google Patents
Flexible direct current tractive power supply system and its control method are pressed in one kind Download PDFInfo
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- CN107953803A CN107953803A CN201711425550.8A CN201711425550A CN107953803A CN 107953803 A CN107953803 A CN 107953803A CN 201711425550 A CN201711425550 A CN 201711425550A CN 107953803 A CN107953803 A CN 107953803A
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- voltage
- power supply
- traction substation
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses flexible direct current tractive power supply system and its control method are pressed in one kind.Tractive power supply system includes more than one traction substation；Traction substation includes triphase step-down transformer, three-phase reactor, voltage source converter and the first dc bus being sequentially connected；The input terminal of triphase step-down transformer is connected to three phase network, the cathode and anode of voltage source converter output terminal are connected respectively to the cathode and anode of the first dc bus, and the cathode and anode of the first dc bus are connected to contact net and rail by feeder line and return wire respectively.The invention has the advantages that the power quality of system can be significantly improved, electric split-phase link is completely abolished, realizes whole Traction networks perforation power supply.In addition, which can also increase the power supply distance of single traction substation, realize that Along Railway regenerative resource, locomotive regenerating braking energy efficiently use.
Description
Technical field
The present invention relates to electric railway traction power supply system technical field, especially presses flexible direct current traction to supply in one kind
Electric system and its control method.
Background technology
Power producer of the tractive power supply system as electric railway, its power supply quality it is good and bad by the safety of railway,
Reliably, economical operation produces important influence.At present, the main power supply mode of overwhelming majority of countries electric railway becomes for traction
Electric institute takes electricity from three phase network by the phase transformer of three-phase-two and transforms it into two-phase and powers respectively to both sides Traction networks.So
And as the development of railway high speed, heavy loading, the powering mode are faced with acid test.It is mainly reflected in：1) existing traction
Electric power system there are negative phase-sequence, harmonic wave and it is idle the problems such as polluted the power quality of utility network；2) presence of electric split-phase becomes
One of weak link of railway security traveling, limits locomotive and is smoothly continuously flowed, cause loss, the load energy of locomotive speed
Power reduces；3) split-phase sectional power supply causes locomotive regenerative braking to produce energy and can not flow to other power supply sections, causes this
Section voltage of powering raises, and then influences equipment normal operation, while causes the loss of big energy；4) confession of split-phase segmentation
The access of new energy is not suitable for electrically.
For single phase industrial frequency AC system formula tractive power supply system there are the problem of, related scientific research unit, which has been carried out, largely grinds
Study carefully work, wherein cophase supply technology provides a kind of preferable solution to solve the above problems, and is widely closed
Note and attention.Homo-phase traction power supply system based on Existing railway promotion can be effectively improved power quality, reduce the electricity of system half
Split-phase.But the output voltage of adjacent traction substation (amplitude, phase angle, frequency) has differences, traction substation is difficult to reach
Really perforation power supply.It is through same based on three-phase-single-phase invertor with the development of Power Electronic Technique and control theory
Phase tractive power supply system is expected to realize that railway run-through is powered.This tractive power supply system can completely abolish electric split-phase, substantially improve
Public electric wire net and traction and can realize the regeneration of locomotive brake energy and the access of new energy at network electric energy quality, be one
The preferable novel traction power supply mode of kind.
In recent years, it is superior due to its with the development of Power Electronic Technique and control theory, high voltage dc transmission technology
Technology and economic performance obtained large-scale application in the application scenarios of remote, large capacity conveying electric energy.In addition, direct current
Technology is also played an important role in every field such as ship, subway, micro-capacitance sensor, domestic power networks.Therefore, for existing friendship
The problems that stream tractive power supply system exposes.The tractive power supply system of direct current standard by be following Development of High Speed Railway weight
Want direction, and the further development that high-speed railway will be promoted.
The content of the invention
The object of the present invention is to provide flexible direct current tractive power supply system is pressed in one kind, which, which can significantly improve, is
The power quality of system, completely abolishes electric split-phase link, realizes whole Traction networks perforation power supply.In addition, which can also increase
The power supply distance of big single traction substation, realize that Along Railway regenerative resource, locomotive regenerating braking energy efficiently use.
The present invention is to reforming existing power frequency single-phase ac power supply mode and promoting the further development of China railways to have great importance.
Realizing the technical solution of the object of the invention is：Flexible direct current tractive power supply system, including more than one are pressed in one kind
Traction substation；The traction substation includes triphase step-down transformer, three-phase reactor, the voltage source converter being sequentially connected
With the first dc bus；The input terminal of the triphase step-down transformer is connected to three phase network, voltage source converter output terminal
Cathode and anode are connected respectively to the cathode and anode of the first dc bus, and the cathode and anode of the first dc bus pass through respectively
Feeder line and return wire are connected to contact net and rail.
Further, new energy device and energy storage device are further included；The new energy device include wind power plant and
Photovoltaic apparatus, the energy storage device include storage battery, super capacitor and flywheel；The new energy device and energy storage device lead to respectively
Cross AC-DC or DC-DC converter is connected to the cathode and anode of the first dc bus.
Further, new energy device and energy storage device are further included；The new energy device include wind power plant and
Photovoltaic apparatus, the energy storage device include storage battery, super capacitor and flywheel；The new energy device and energy storage device lead to respectively
Cross AC-DC or DC-DC converter is connected to the cathode and anode of the second dc bus, the cathode and anode point of the second dc bus
Contact net and rail are not connected to it.
In above-mentioned technical proposal, the voltage source converter output DC voltage range is 16kV~35kV.
It is a kind of it is middle pressure flexible direct current tractive power supply system control method, collection traction substation output DC voltage with
Electric current, carries out the output voltage of traction substation according to voltage-electric current droop characteristic and actual output voltage amplitude
Adjust, including：
The DC voltage and electric current of traction substation output are gathered, low-pass filtering is carried out and obtains corresponding DC voltage
UdcmeaWith electric current Idcmea；
Pass throughObtain traction substation it is current when
Carve the reference value of output voltage：Wherein, Udc *It is the reference value of traction substation output voltage, UdcrateIt is traction substation output
The rated value of voltage, RdroopIt is sagging coefficient；It is proportional plus integral control, KpcoAnd KicoIt is ratio and product respectively
Divide coefficient；
Voltage source converter makes output voltage of traction substation etc. through Double closed-loop of voltage and current in traction substation
In reference voltage Udc *。
Compared with prior art, the beneficial effects of the invention are as follows：
1st, pressed in the present invention in one kind for proposing in flexible direct current tractive power supply system, voltage source converter is by three-phase alternating current
It is transformed to 16kV~35kV DC voltages and is used for tractor-trailer train.Since voltage source converter output voltage amplitude is controllable, lead
Drawing the electric neutral section of net can fully phase out, and Traction networks can form the supply network of perforation.
2nd, voltage source converter can ensure three-phase power load complete equipilibrium, be both operable with rectification or be operable with inverse
Change state, and its active and reactive power can be with independent control.Therefore, locomotive regenerative braking produces energy and can obtain abundant profit
With.At the same time under direct current standard, the access of regenerative resource and energy storage device becomes to be more prone to, for promoting tractive power supply system
Green Sustainable be of great significance.
3rd, under direct current standard, since induction reactance is not present in Traction networks, in the case where ensureing identical quality of voltage, power supply
The distance of arm can become longer；Meanwhile contact net and rail can be filled without kelvin effect problem, conductor cross-section under direct current standard
Divide and utilize, therefore contact web frame to become simpler, the confession identical with exchanging can be realized using less conducting wire
Electric energy power.
4th, the present invention be directed to the method that middle pressure flexible direct current tractive power supply system proposes need not gather local information with
Outer signal, does not depend on the communication between traction substation, can the Voltage Drop caused by traditional droop control compensate, make
Obtain system voltage to recover, so as to fulfill system safe and stable operation.
Brief description of the drawings
Fig. 1 is middle pressure flexible direct current tractive power supply system structure diagram.
Fig. 2 is the control block diagram of voltage source converter in traction substation.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Such as Fig. 1, flexible direct current tractive power supply system is pressed in a kind of, is interconnected and is formed by Traction networks by multiple traction substations
The through DC suppling network of electric energy is provided to locomotive；Wherein, each traction substation includes：The three-phase step-down being sequentially connected
Transformer, three-phase reactor, voltage source converter, dc bus.Wherein, the output head anode of voltage source converter and anode point
It is not connected with the cathode and anode of the dc bus of traction substation, the cathode and anode of dc bus by feeder line and return respectively
Streamline is connected with contact net and rail.
It is above-mentioned it is middle pressure flexible direct current tractive power supply system in, voltage source converter output DC voltage range for 16kV~
35kV。
Also access has new energy and energy storage device, new energy on the Traction networks of above-mentioned middle pressure flexible direct current tractive power supply system
(wind-force, photovoltaic etc.) and energy storage device (storage battery, super capacitor, flywheel etc.) pass through AC-DC or DC-DC converter access system
System.New energy and energy storage device can be separately provided, and can also be arranged in traction substation.
The control method of middle pressure flexible direct current tractive power supply system is that each traction substation gathers it and exports DC voltage
Output voltage with electric current and according to voltage-electric current droop characteristic and actual output voltage amplitude to traction substation
Automatically adjust, specifically comprise the steps of：
1) gather traction substation output DC voltage and electric current and carry out low-pass filtering and obtain corresponding DC voltage
UdcmeaWith electric current Idcmea；
2) reference value of traction substation output voltage is obtained by formula (3)：
Wherein, Udc *It is the reference value of traction substation output voltage, UdcrateIt is the specified of traction substation output voltage
Value, RdroopIt is sagging coefficient, KpcoAnd KicoIt is ratio and integral coefficient respectively.
3) voltage source converter through Double closed-loop of voltage and current, makes the output voltage of traction substation in traction substation
The reference voltage obtained equal to 2) step so that system voltage recovers.
The control block diagram of voltage source converter is as shown in Figure 2 in each traction substation.
Claims (5)
1. flexible direct current tractive power supply system is pressed in one kind, it is characterised in that：Including more than one traction substation；The traction
Electric substation includes triphase step-down transformer, three-phase reactor, voltage source converter and the first dc bus being sequentially connected；It is described
The input terminal of triphase step-down transformer is connected to three phase network, and the cathode and anode of voltage source converter output terminal are connected respectively to
The cathode and anode of first dc bus, the cathode and anode of the first dc bus are connected to by feeder line and return wire respectively to be connect
Net-fault and rail.
2. press flexible direct current tractive power supply system in one kind as claimed in claim 1, it is characterised in that：Further include new energy dress
Put and energy storage device；The new energy device includes wind power plant and photovoltaic apparatus, the energy storage device include storage battery,
Super capacitor and flywheel；It is straight that the new energy device and energy storage device are connected to first by AC-DC or DC-DC converter respectively
Flow the cathode and anode of busbar.
3. press flexible direct current tractive power supply system in one kind as claimed in claim 1, it is characterised in that：Further include new energy dress
Put and energy storage device；The new energy device includes wind power plant and photovoltaic apparatus, the energy storage device include storage battery,
Super capacitor and flywheel；It is straight that the new energy device and energy storage device are connected to second by AC-DC or DC-DC converter respectively
The cathode and anode of busbar are flowed, the cathode and anode of the second dc bus are connected respectively to contact net and rail.
4. press flexible direct current tractive power supply system in one kind as claimed in claim 1, it is characterised in that：The voltage source converter
Device output DC voltage range is 16kV~35kV.
A kind of 5. control method of middle pressure flexible direct current tractive power supply system, it is characterised in that：Gather traction substation output
DC voltage and electric current, according to voltage-electric current droop characteristic and actual output voltage amplitude to the defeated of traction substation
Go out voltage to be adjusted, including：
The DC voltage and electric current of traction substation output are gathered, low-pass filtering is carried out and obtains corresponding DC voltage UdcmeaWith electricity
Flow Idcmea；
Pass throughIt is defeated to obtain traction substation current time
Go out the reference value of voltage：Wherein, Udc *It is the reference value of traction substation output voltage, UdcrateIt is traction substation output voltage
Rated value, RdroopIt is sagging coefficient；It is proportional plus integral control, KpcoAnd KicoIt is ratio and integration system respectively
Number；
Voltage source converter makes the output voltage of traction substation be equal to ginseng through Double closed-loop of voltage and current in traction substation
Examine voltage Udc *。
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| CN201711425550.8A CN107953803B (en) | 2017-12-25 | 2017-12-25 | Medium-voltage flexible direct-current traction power supply system and control method thereof |
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| CN201711425550.8A CN107953803B (en) | 2017-12-25 | 2017-12-25 | Medium-voltage flexible direct-current traction power supply system and control method thereof |
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| CN107953803B CN107953803B (en) | 2023-04-18 |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599161A (en) * | 2018-06-20 | 2018-09-28 | 西南交通大学 | A kind of through tractive power supply system |
| CN109193614A (en) * | 2018-08-29 | 2019-01-11 | 微控物理储能研究开发（深圳）有限公司 | Flywheel energy storage regenerative braking energy feedback system and its control method |
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
| CN110040039A (en) * | 2019-05-21 | 2019-07-23 | 西南交通大学 | A kind of the alternating current traction power supply system and method for photovoltaic energy storage distributed power generation |
| CN110460077A (en) * | 2019-08-27 | 2019-11-15 | 西南交通大学 | A kind of new energy system and control method for urban rail Traction networks |
| CN110635470A (en) * | 2019-11-11 | 2019-12-31 | 西南交通大学 | Layered control method for flexible medium-voltage direct-current railway power supply system |
| CN110654241A (en) * | 2018-06-29 | 2020-01-07 | 中车株洲电力机车研究所有限公司 | Optimized energy interconnection system for urban rail train |
| CN111251948A (en) * | 2020-05-06 | 2020-06-09 | 北京中清智辉能源科技有限公司 | Rail transit traction power supply system |
| CN111347941A (en) * | 2018-12-20 | 2020-06-30 | 比亚迪股份有限公司 | Auxiliary power supply system for railway vehicle and control method thereof |
| CN112350377A (en) * | 2021-01-11 | 2021-02-09 | 西南交通大学 | In-phase traction power supply power generation system and control method |
| CN112977077A (en) * | 2021-02-20 | 2021-06-18 | 天津大学 | Flexible direct-current traction power supply system operation domain model construction and solution method |
| CN113300349A (en) * | 2021-05-31 | 2021-08-24 | 湖南铁道职业技术学院 | Subway traction power supply method and system |
| CN113497461A (en) * | 2021-09-08 | 2021-10-12 | 西南交通大学 | Three-phase traction network distributed power generation and supply system and control method |
| CN114447972A (en) * | 2021-12-21 | 2022-05-06 | 西南交通大学 | Through flexible traction substation based on existing traction transformer and protection configuration method thereof |
| CN114498576A (en) * | 2021-12-21 | 2022-05-13 | 西南交通大学 | MMC-based run-through flexible traction substation and protection configuration method thereof |
| CN114498715A (en) * | 2021-12-21 | 2022-05-13 | 西南交通大学 | New energy storage system with centralized access to flexible traction transformer and control method |
| CN115333105A (en) * | 2022-08-29 | 2022-11-11 | 西南交通大学 | Electrified railway alternating current-direct current energy storage power supply system and energy control method |
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Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108599161B (en) * | 2018-06-20 | 2023-09-01 | 西南交通大学 | Through traction power supply system |
| CN108599161A (en) * | 2018-06-20 | 2018-09-28 | 西南交通大学 | A kind of through tractive power supply system |
| CN110654241B (en) * | 2018-06-29 | 2023-03-21 | 中车株洲电力机车研究所有限公司 | Optimized energy interconnection system for urban rail train |
| CN110654241A (en) * | 2018-06-29 | 2020-01-07 | 中车株洲电力机车研究所有限公司 | Optimized energy interconnection system for urban rail train |
| CN109193614A (en) * | 2018-08-29 | 2019-01-11 | 微控物理储能研究开发（深圳）有限公司 | Flywheel energy storage regenerative braking energy feedback system and its control method |
| CN111347941A (en) * | 2018-12-20 | 2020-06-30 | 比亚迪股份有限公司 | Auxiliary power supply system for railway vehicle and control method thereof |
| CN111347941B (en) * | 2018-12-20 | 2022-03-18 | 比亚迪股份有限公司 | Auxiliary power supply system for railway vehicle and control method thereof |
| CN109606208B (en) * | 2019-01-11 | 2023-11-03 | 西南交通大学 | Off-grid railway traction power supply system and regulation and control method |
| CN109606208A (en) * | 2019-01-11 | 2019-04-12 | 西南交通大学 | A kind of off-network railway traction power supply system and regulation method |
| CN110040039B (en) * | 2019-05-21 | 2023-06-09 | 西南交通大学 | Alternating-current traction power supply system and method for photovoltaic energy storage distributed power generation |
| CN110040039A (en) * | 2019-05-21 | 2019-07-23 | 西南交通大学 | A kind of the alternating current traction power supply system and method for photovoltaic energy storage distributed power generation |
| CN110460077A (en) * | 2019-08-27 | 2019-11-15 | 西南交通大学 | A kind of new energy system and control method for urban rail Traction networks |
| CN110460077B (en) * | 2019-08-27 | 2022-04-26 | 西南交通大学 | Control method of new energy power supply system for urban rail traction network |
| CN110635470A (en) * | 2019-11-11 | 2019-12-31 | 西南交通大学 | Layered control method for flexible medium-voltage direct-current railway power supply system |
| CN110635470B (en) * | 2019-11-11 | 2022-03-18 | 西南交通大学 | Layered control method for flexible medium-voltage direct-current railway power supply system |
| CN111251948A (en) * | 2020-05-06 | 2020-06-09 | 北京中清智辉能源科技有限公司 | Rail transit traction power supply system |
| CN111251948B (en) * | 2020-05-06 | 2020-08-21 | 北京中清智辉能源科技有限公司 | Rail transit traction power supply system |
| CN112350377A (en) * | 2021-01-11 | 2021-02-09 | 西南交通大学 | In-phase traction power supply power generation system and control method |
| CN112350377B (en) * | 2021-01-11 | 2021-04-13 | 西南交通大学 | In-phase traction power supply power generation system and control method |
| CN112977077B (en) * | 2021-02-20 | 2022-06-10 | 天津大学 | Flexible direct-current traction power supply system operation domain model construction and solution method |
| CN112977077A (en) * | 2021-02-20 | 2021-06-18 | 天津大学 | Flexible direct-current traction power supply system operation domain model construction and solution method |
| CN113300349A (en) * | 2021-05-31 | 2021-08-24 | 湖南铁道职业技术学院 | Subway traction power supply method and system |
| CN113497461A (en) * | 2021-09-08 | 2021-10-12 | 西南交通大学 | Three-phase traction network distributed power generation and supply system and control method |
| CN114498715A (en) * | 2021-12-21 | 2022-05-13 | 西南交通大学 | New energy storage system with centralized access to flexible traction transformer and control method |
| CN114498576A (en) * | 2021-12-21 | 2022-05-13 | 西南交通大学 | MMC-based run-through flexible traction substation and protection configuration method thereof |
| CN114447972A (en) * | 2021-12-21 | 2022-05-06 | 西南交通大学 | Through flexible traction substation based on existing traction transformer and protection configuration method thereof |
| CN115333105A (en) * | 2022-08-29 | 2022-11-11 | 西南交通大学 | Electrified railway alternating current-direct current energy storage power supply system and energy control method |
| CN115333105B (en) * | 2022-08-29 | 2024-04-12 | 西南交通大学 | AC/DC energy storage power supply system and energy control method for electrified railway |
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