CN111614080A - Railway energy storage device with power fusion function - Google Patents
Railway energy storage device with power fusion function Download PDFInfo
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- CN111614080A CN111614080A CN202010434079.4A CN202010434079A CN111614080A CN 111614080 A CN111614080 A CN 111614080A CN 202010434079 A CN202010434079 A CN 202010434079A CN 111614080 A CN111614080 A CN 111614080A
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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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- 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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- 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
- B60M3/06—Arrangements for consuming regenerative power
-
- 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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/66—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
- H02M7/68—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
- H02M7/72—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/79—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/797—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a railway energy storage device with a power fusion function, which comprises a traction transformer and a modularized multi-level DC/DC converter, wherein the traction transformer is respectively connected with a first single-phase modularized multi-level AC/DC converter and a second single-phase modularized multi-level AC/DC converter through two soft start circuits, the first single-phase modularized multi-level AC/DC converter and the second single-phase modularized multi-level AC/DC converter are connected through a direct-current positive bus and a direct-current negative bus, the direct-current positive bus and the direct-current negative bus are also connected with an LC filter circuit connected with the middle direct-current side in parallel, the high-voltage side of the modularized multi-level DC/DC converter is connected with the voltage of the positive direct-current bus and the negative bus in series, and the low-voltage side of the modularized multi-level DC/DC converter is connected with. The device has the advantages of convenient installation, small floor area, low loss, small current harmonic wave, energy fusion between the two power supply arms and redundant energy storage.
Description
Technical Field
The invention belongs to the technical field of electrified railway energy storage, and relates to a railway energy storage device with a power fusion function.
Background
The railway development planning of China is proposed: the method has the advantages of wide application of new technology and new equipment, optimization of energy consumption management, popularization of intelligent energy-saving management and control, improvement of comprehensive utilization of energy and improvement of transportation effect. Therefore, the intelligent equipment beneficial to comprehensive and efficient utilization of the electrified railway energy in China is the requirement of national policy and practical requirement in China. The locomotive load of the electrified railway not only absorbs energy from a power grid, but also can convert kinetic energy into electric energy under certain braking conditions, namely, part of the generated electric energy is absorbed by other tractors of the same power supply arm at present, and the other part of the generated electric energy is wasted, so that in order to respond to the policy of national railway development and planning, the research on a railway energy storage system with a power fusion function has certain social benefit and economic effect.
Chinese patent CN201410173661 discloses an electric energy quality comprehensive treatment device and method with power fusion function, which transfers energy from a single-phase power grid without really realizing bidirectional power circulation.
Chinese patent CN201611086466 discloses a railway power fusing and transforming device, but redundant energy of the device is not stored after fusing, and the device uses two step-down transformers to reduce 27.5KV high voltage to low voltage and then uses a two-level converter to realize energy fusing, and the device adopts two step-down transformers, so that the occupied area is large, and the loss is large; the converter topology adopts a two-level topology and is merged into a power grid, the current harmonic current is large, and the power grid is easily polluted.
Disclosure of Invention
The invention aims to provide a railway energy storage device with a power fusion function, which has the advantages of convenience in installation, small floor area, low loss, small current harmonic wave, capability of fusing energy not only in two power supply arms, but also capable of storing redundant energy.
The technical scheme includes that the railway energy storage device with the power fusion function comprises a traction transformer and a modularized multi-level DC/DC converter, wherein the traction transformer is respectively connected with a first single-phase modularized multi-level AC/DC converter and a second single-phase modularized multi-level AC/DC converter through two soft start circuits, the first single-phase modularized multi-level AC/DC converter and the second single-phase modularized multi-level AC/DC converter are connected with a direct-current positive bus and a direct-current negative bus through direct-current buses, the direct-current positive bus and the direct-current negative bus are further connected with an LC filter circuit connected with the middle direct-current side in parallel, the high-voltage side of the modularized multi-level DC/DC converter is connected with the positive direct-current bus and the negative bus in series, and the low-voltage side of the modularized multi-level DC/DC converter is connected with a lithium battery.
The invention is also characterized in that:
the first single-phase modular multilevel AC/DC converter and the second single-phase modular multilevel AC/DC converter are formed by cascading n power unit modules which are symmetrical up and down according to the voltage of a direct-current bus.
The modular multi-level DC/DC converter is formed by connecting n active bidirectional bridge DAB power units in series.
The upper bridge and the lower bridge of the first single-phase modular multilevel AC/DC converter are respectively connected with a current-limiting inductor in series, the single-phase AC 27.5kV power grid voltage is connected with the midpoint between the two current-limiting inductors of the upper bridge and the lower bridge through a contactor and a soft start resistor of a soft start circuit, the upper bridge and the lower bridge of the second single-phase modular multilevel AC/DC converter are also respectively connected with a current-limiting inductor in series, and the single-phase AC 27.5kV power grid voltage is connected with the midpoint between the two current-limiting inductors of the upper bridge and the lower bridge through the contactor and the soft start resistor of.
The power unit module consists of a single-phase half bridge or a single-phase full bridge.
The active bidirectional bridge DAB power unit is formed by connecting a high-voltage side single-phase full bridge and a low-voltage side single-phase full bridge through a high-frequency transformer.
The traction transformer reduces the three-phase 220kV/110kV traction power supply voltage into a single-phase 27.5kV voltage with two phases which are different by 90 degrees or 120 degrees, and the single-phase voltage is output through an Alpha power supply arm and a Beta power supply arm.
The first single-phase modular multilevel AC/DC converter is connected to the Alpha supply arm and the second single-phase modular multilevel AC/DC converter is connected to the Beta supply arm.
The invention has the beneficial effects that:
(1) redundant energy fed back by the arm can be fused to the other arm through the converter or stored in the lithium battery energy storage cabin through the converter;
(2) the modular multi-level AC/DC converter reduces the output harmonic current;
(3) by adopting a modular multilevel structure, the step-down transformer is reduced, the occupied area is reduced, and the equipment cost is reduced;
(4) the DC side is connected with an LC filter circuit in parallel, so that double frequency pulsation of DC voltage is suppressed;
(5) the converter and the converter adopt a modular structural design and can be increased or decreased according to the energy.
Drawings
FIG. 1 is a schematic diagram of a railway energy storage device with power integration function according to the present invention;
FIG. 2 is a schematic circuit diagram of a power sub-module of a modular multilevel AC/DC converter of a railway energy storage device with power integration function according to the invention;
fig. 3 is a schematic circuit diagram of a power sub-module of a modular multilevel DC/DC converter of a railway energy storage device with a power fusion function according to the invention.
In the figure, 1 is a traction transformer, 2 is Alpha, 3 is Beta, 4 is a power unit a1, 5 is a power unit b1, 6 is a power unit n1, 7 is an upper power-on power-off QF1, 8 is a contactor KM1, 9 is an upper power-on power-off QF2, 10 is a soft-start resistor R1, 11 is an inductor L1, 12 is an inductor L2, 13 is a power unit a2, 15 is a power unit n2, 16 is an inductor L3, 17 is an inductor L4, 18 is a direct current positive bus, 19 is a reactor L9, 20 is a filter capacitor C1, 21 is a direct current negative bus, 22 is a DAB power unit a1, 23 is a DAB power unit a2, 24 is a DAB power unit a3, 25 is a lithium battery energy storage cabin.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a railway energy storage device with a power fusion function, which comprises a traction transformer 1 and a modularized multi-level DC/DC converter, wherein the traction transformer 1 is respectively connected with a first single-phase modularized multi-level AC/DC converter and a second single-phase modularized multi-level AC/DC converter through two soft start circuits, the first single-phase modularized multi-level AC/DC converter and the second single-phase modularized multi-level AC/DC converter are connected with a direct-current positive bus and a direct-current negative bus through direct-current positive buses, the direct-current positive bus and the direct-current negative bus are also connected with an LC filter circuit connected with the middle direct-current side in parallel, the high-voltage side of the modularized multi-level DC/DC converter is connected with the positive direct-current bus and the negative bus voltage in series, and the low-voltage side of the modularized multi-level DC/DC converter is connected;
the first single-phase modular multilevel AC/DC converter and the second single-phase modular multilevel AC/DC converter are both formed by cascading n power unit modules with symmetrical upper and lower bridges determined according to the voltage of a direct-current bus, each power unit module is formed by a single-phase half bridge or a single-phase full bridge, the upper and lower bridges of the first single-phase modular multilevel AC/DC converter are respectively connected with a current-limiting inductor in series, the single-phase AC 27.5kV power grid voltage is connected with the midpoint between the two current-limiting inductors of the upper and lower bridges through a contactor and a buffer resistor of a soft start circuit, the upper and lower bridges of the second single-phase modular multilevel AC/DC converter are also respectively connected with a current-limiting inductor in series, and the single-phase AC 27.5kV power grid voltage is connected with the midpoint between the two current-limiting;
the modularized multi-level DC/DC converter is formed by connecting n active bidirectional bridge DAB power units in series, and the active bidirectional bridge DAB power units are formed by connecting a high-voltage side single-phase full bridge with a low-voltage side single-phase full bridge through a high-frequency transformer;
the traction transformer reduces the three-phase 220kV/110kV traction power supply voltage into a single-phase 27.5kV voltage with two phases which are 90 degrees or 120 degrees different from each other, and the single-phase voltage is output through an Alpha power supply arm and a Beta power supply arm; the first single-phase modular multilevel AC/DC converter is connected to the Alpha 2 supply arm and the second single-phase modular multilevel AC/DC converter is connected to the Beta 3 supply arm.
In this embodiment, the traction transformer 1 steps down the three-phase 220kV/110kV traction supply voltage to a single-phase 27.5kV with two phases different from each other by 90 degrees or 120 degrees, and outputs the voltage through two power supply arms, Alpha 2 and Beta 3, where one of the Alpha 2 power supply arms is connected to the contactor KM 18 of the soft start circuit and one end of the soft start resistor R110 through the power-on air-on open QF 17, the other of the soft start resistor R110 is connected to the midpoint of one upper and lower bridge arm of the single-phase modular multilevel converter, i.e. the middle of the connection point of the inductor L111 and the inductor L212, the other of the Alpha 2 power supply arms is connected to the midpoint of the other upper and lower bridge arm of the single-phase modular multilevel converter, i.e. the middle of the connection point of the inductor L316 and the inductor L417, one of the Beta 3 power supply arm is connected to one end of the contactor KM 231 of the soft start circuit and the soft start resistor R234 through the power-on air-on open 3, the other of the soft start resistor R234 is, namely the middle of the connection point of the inductor L738 and the inductor L839, and the other phase of the Beta 3 power supply arm is connected to the middle point of the other upper and lower bridge arms of the single-phase modular multilevel converter through the upper air switch QF 433, namely the middle of the connection point of the inductor L526 and the inductor L627.
In this embodiment, a railway energy storage device with power integration function is composed of two identical single-phase modular multilevel AC/DC converters and a modular multilevel DC/DC converter, the first single-phase modular multilevel AC/DC converter is connected to the Alpha 2 power supply arm, the second single-phase modular multilevel AC/DC converter is connected to the Beta 3 power supply arm, the single-phase modular multilevel AC/DC converter is composed of two identical upper and lower bridge arms, each of the upper and lower bridge arms is composed of n identical power units, the magnitude of n is determined by the voltage of 18 direct current positive bus, the voltage of 21 direct current negative bus and the capacitance voltage of the power unit, the power unit is composed of a single-phase half bridge, the circuit schematic diagram is as shown in fig. 2, but not limited to a single-phase half bridge, or may be a single-phase full bridge or other derivative circuits of the two circuits, one end of the power unit a 14 is connected with the direct current positive bus 18, the other end is connected with one end of the power unit b 15, the connection is repeated until the power unit n 16, the other end of the power unit n 16 is connected with one end of the upper bridge reactor L111, the other end of the L111 is connected with one end of the lower bridge reactor L212 and one end of the charging resistor R1, the other end of the L212 is connected with one end of the power unit a 213, the connection is repeated until the other end of the power unit n 215 is connected with the negative bus 21, and the connection relationship is not repeated because the first modular multilevel AC/DC converter and the second modular multilevel AC/DC converter are completely the same. After each power unit is successfully soft started, the redundant feedback energy is directly fused on the Alpha 2 and Beta 3 power supply arms by controlling the on and off of each power unit.
In the present embodiment, the DC-side voltage includes fundamental frequency-doubled DC ripple due to the rectification characteristic of the single-phase modular multilevel AC/DC converter, and in order to solve the ripple, the LC filter circuit is connected in parallel on the DC-side, and the reactor L919 has one end connected to the DC positive bus 18, the other end connected to one end of the filter capacitor C120, and the other end of the capacitor 20 connected to the negative bus voltage 21.
In this embodiment, the present invention has an important function, i.e., energy storage, in addition to power integration, and is composed of a modular multilevel DC/DC converter and a lithium battery energy storage compartment. The modular multi-level DC/DC converter has the functions that firstly, the residual energy after being melted is stored in the lithium battery energy storage cabin, and secondly, when the energy is needed by the power supply arm, the energy of the lithium battery energy storage cabin is transmitted to the scheduled power supply arm through the modular multi-level AC/DC converter, the modular multi-level DC/DC converter consists of n identical power units, the size of n is determined by the voltage of an 18 direct current positive bus, the voltage of a 21 direct current negative bus and the capacitance voltage of a DAB power unit, the DAB power unit a 122 consists of a double active bridge DAB, the internal circuit of the DAB power unit a 122 is a conversion circuit of the circuit as shown in figure 3, the identical power units are connected in series at the high-voltage sides, the high-voltage side of the DAB power unit a 122 is connected to the direct current positive bus 18, the negative end of the high-voltage side is connected to the high-voltage side of the next DA, the DAB power unit a 223 negative terminal is connected to other power units in an analogized mode in sequence until the DAB power unit a 324 high-voltage side is positive in series connection, the DAB power unit a 324 negative terminal is connected to the direct-current negative bus 21, the low-voltage sides of the power units are connected to the lithium battery energy storage cabin 25 in parallel connection or can be connected to the modular lithium battery energy storage units independently, the DAB power unit a 122 shown in the figure 1, the DAB power unit a 223 and the DAB power unit a 324 low-voltage side are connected together in parallel, the low-voltage sides are connected together in parallel, the positive and the negative of the low-voltage sides are connected to the corresponding positive and negative ends of the lithium battery respectively, and the modular multilevel DC/DC converter sub-module shown in the figure 3 is connected.
The invention relates to a railway energy storage device with a power fusion function, which comprises the following working processes: the soft start circuit carries out soft charging on each modular multilevel submodule capacitor, after charging is finished, the charging circuit is closed, the converter unit realizes mutual fusion of redundant energy of an Alpha side and a Beta side according to a scheduling command of the cloud platform, and if the redundant energy after fusion occurs, the submodule of the modular multilevel DC/DC converter is switched on and off to store the redundant energy to the lithium battery energy storage cabin. When the Beta-side power grid has no redundant energy to the Alpha side or the Alpha-side power grid has no redundant energy to the Beta side, the sub-modules of the modular multilevel DC/DC converter are switched on and off, and the energy stored in the lithium battery energy storage cabin is returned to the power grid side to be dispatched through the converter and the converter.
The invention relates to a railway energy storage device with a power fusion function, which has the advantages that:
(1) compared with the prior art, the railway energy storage device with the power fusion function reduces step-down transformers, reduces the cost of a system, and reduces the occupied area of the original transformer;
(2) the railway energy storage device with the power fusion function can not only fuse the braking energy of the locomotive at two power supply arms, but also store the residual fused energy in the energy storage cabin for next peak regulation scheduling or traction, thereby saving energy;
(3) the railway energy storage device with the power fusion function adopts the modular multilevel AC/DC converter, so that the output harmonic current is reduced;
(4) the converter and the converter of the railway energy storage device with the power integration function adopt a modular structural design, and can be increased or decreased according to the energy;
(5) the converter of the railway energy storage device with the power integration function adopts the high-frequency transformer to isolate the high-voltage side and the low-voltage side, so that the battery is safer.
Through the mode, the railway energy storage device with the power fusion function utilizes the modularized multi-level converter to be connected with the two power supply arms, and the modularized converter is connected with the direct-current bus end, so that the power fusion between the two power supply arms and the energy storage cabin can be realized by the train braking feedback energy, and the energy conservation is realized.
Claims (8)
1. A railway energy storage device with a power fusion function is characterized by comprising a traction transformer (1) and a modularized multi-level DC/DC converter, the traction transformer (1) is respectively connected with a first single-phase modular multilevel AC/DC converter and a second single-phase modular multilevel AC/DC converter through two soft start circuits, the first single-phase modular multilevel AC/DC converter and the second single-phase modular multilevel AC/DC converter are connected through a direct current positive bus (18) and a direct current negative bus (21), the direct current positive bus (18) is connected with an LC filter circuit connected in parallel with the direct current side in the middle of the direct current negative bus (21), the high-voltage side of the modularized multi-level DC/DC converter is connected to a direct-current positive bus (18) and a direct-current negative bus (21) in series, and the low-voltage side of the modularized multi-level DC/DC converter is connected with the lithium battery energy storage cabin after being connected in parallel.
2. The railway energy storage device with the power fusion function as claimed in claim 1, wherein the first single-phase modular multilevel AC/DC converter and the second single-phase modular multilevel AC/DC converter are each composed of n power unit modules which are symmetrical up and down according to a direct-current bus voltage.
3. The railway energy storage device with power integration function as claimed in claim 1, wherein the modular multi-level DC/DC converter is composed of n active bidirectional bridge DAB power units connected in series.
4. The railway energy storage device with the power fusion function as claimed in claim 2, wherein the upper bridge and the lower bridge of the first single-phase modular multilevel AC/DC converter are connected in series with a current-limiting inductor, the single-phase AC 27.5kV grid voltage is connected with the midpoint between the two current-limiting inductors of the upper bridge and the lower bridge through a contactor and a soft start resistor of a soft start circuit, the upper bridge and the lower bridge of the second single-phase modular multilevel AC/DC converter are also connected in series with a current-limiting inductor, and the single-phase AC 27.5kV grid voltage is connected with the midpoint between the two current-limiting inductors of the upper bridge and the lower bridge through the contactor and the soft start resistor of the soft start circuit.
5. The railway energy storage device with power fusion function as claimed in claim 2, wherein the power unit module is composed of a single-phase half bridge or a single-phase full bridge.
6. The railway energy storage device with power fusion function as claimed in claim 2, wherein the active bidirectional bridge DAB power unit is connected by high-voltage side and low-voltage side single-phase full bridges through a high-frequency transformer.
7. The railway energy storage device with power fusion function as claimed in claim 1, wherein the traction transformer (1) reduces the three-phase 220kV/110kV traction supply voltage to a single-phase 27.5kV voltage with two phases different by 90 degrees or 120 degrees, and outputs the single-phase 27.5kV voltage through an Alpha (2) power supply arm and a Beta (3) power supply arm.
8. The railway energy storage device with power integration function of claim 7, wherein the first single-phase modular multilevel AC/DC converter is connected to Alpha (2) power supply arm, and the second single-phase modular multilevel AC/DC converter is connected to Beta (3) power supply arm.
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| CN202010434079.4A CN111614080A (en) | 2020-05-21 | 2020-05-21 | Railway energy storage device with power fusion function |
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| CN202010434079.4A CN111614080A (en) | 2020-05-21 | 2020-05-21 | Railway energy storage device with power fusion function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103552487A (en) * | 2013-10-17 | 2014-02-05 | 南车株洲电力机车研究所有限公司 | Co-phase power supply device and traction power supply system |
| CN109428330A (en) * | 2017-08-24 | 2019-03-05 | 株洲变流技术国家工程研究中心有限公司 | Electric railway auxiliary power supply system and control method with power circulation function |
| CN110350564A (en) * | 2019-07-30 | 2019-10-18 | 清华大学 | High pressure direct hanging type energy storage device and Poewr control method |
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2020
- 2020-05-21 CN CN202010434079.4A patent/CN111614080A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103552487A (en) * | 2013-10-17 | 2014-02-05 | 南车株洲电力机车研究所有限公司 | Co-phase power supply device and traction power supply system |
| CN109428330A (en) * | 2017-08-24 | 2019-03-05 | 株洲变流技术国家工程研究中心有限公司 | Electric railway auxiliary power supply system and control method with power circulation function |
| CN110350564A (en) * | 2019-07-30 | 2019-10-18 | 清华大学 | High pressure direct hanging type energy storage device and Poewr control method |
Non-Patent Citations (1)
| Title |
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| 陈民武;蒋汶兵;王旭光;孙小凯;: "高速铁路新型同相贯通供电方案及其仿真研究" * |
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