CN111361462B - Split-phase-free traction power supply device for electrified railway substation - Google Patents
Split-phase-free traction power supply device for electrified railway substation Download PDFInfo
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- CN111361462B CN111361462B CN202010134445.4A CN202010134445A CN111361462B CN 111361462 B CN111361462 B CN 111361462B CN 202010134445 A CN202010134445 A CN 202010134445A CN 111361462 B CN111361462 B CN 111361462B
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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 invention discloses a traction power supply device of an electrified traction substation, which comprises: the traction transformer adopts a three-phase to two-phase wiring mode, a first winding corresponding to a first output of the traction transformer is connected with a first driving direction contact net, a second winding corresponding to a second output of the traction transformer is connected with a second driving direction contact net, the first driving direction contact net is provided with a first electric section, the second driving direction contact net is provided with a second electric section, a first end of the first winding is connected with two sides of the first electric section and is grounded, a first end of the second winding is connected with two sides of the second electric section and is grounded, and a power melting device is arranged between the first winding and the second winding and is used for balancing power among different traction windings. The invention cancels the electric split phase of the contact net at the outlet of the traction substation, only keeps the electric segment, realizes full-line through power supply, reduces the negative sequence problem of the power grid caused by single-phase load, and solves the problem of treatment of various electric energy qualities.
Description
Technical Field
The invention relates to the field of traction power supply of electrified railways, in particular to a traction power supply device for an electrified traction substation.
Background
At present, the electrified railway in China generally adopts a 25kV single-phase power frequency alternating current power supply mode, and a traction substation adopts a 2-circuit high-voltage wire inlet loop and combines a main-standby configuration of a ground traction transformer to improve the reliability of a traction power supply system. However, in order to balance the traction load of a single phase as much as possible in a three-phase power system, traction power supply generally adopts a scheme of alternating phase sequence and split-phase and partitioned power supply, and adjacent power supply sections at the split-phase and partitioned sections are split by a segmented insulator or an anchor segment joint.
For the phase separation of electricity at the outlet of the traction substation, the current technology of pure single-phase power supply or in-phase power supply is adopted for solving the problem. Pure single-phase power supply is limited by negative sequence and economic index constraint, and is rarely adopted in practical engineering. The in-phase power supply technology can solve the problems of negative sequence and electric phase separation, and a traction power supply system (in-phase traction power supply system) based on the in-phase power supply technology is realized in practical engineering. However, as the in-phase power supply technology needs to use an active power compensation device to realize negative sequence control, along with further increase of railway traction load, the in-phase power supply technology is limited by the restrictions of the in-phase power supply compensation device in terms of cost, reliability, capacity, voltage level and the like, the popularization of the in-phase power supply system still faces larger resistance, and even the latest combined in-phase power supply technology cannot completely meet the development requirements of high reliability, low cost, high voltage, large capacity, high energy efficiency and the like of traction power supply.
Disclosure of Invention
In order to solve the technical problems, the invention provides a split-phase-free traction power supply device of an electrified railway substation, which comprises: the traction transformer is characterized in that a first winding corresponding to a first output of the traction transformer is connected with a first driving direction contact net, a second winding corresponding to a second output of the traction transformer is connected with a second driving direction contact net, the first driving direction contact net is provided with a first electric section, the second driving direction contact net is provided with a second electric section, a first end of the first winding is respectively connected with two sides of the first electric section, a second end of the first winding is grounded, a first end of the second winding is respectively connected with two sides of the second electric section, and a second end of the second winding is grounded.
Preferably, the first winding is connected with the first driving direction power supply arm through a first traction bus and a first feeder line of the substation; the second winding is connected with the second driving direction power supply arm through a second traction bus and a second feeder line of the substation.
Preferably, the number of the first electrical segments is 1, and the number of the second electrical segments is 1.
Preferably, the apparatus further comprises: and the power melting device is arranged between the first traction bus and the second traction bus and is used for balancing the load difference between the heterogeneous traction buses so as to treat the electric energy quality.
Preferably, the power melting device includes: the power compensation converter is positioned between the first traction bus and the second traction bus and is used for adjusting alternating current power at two sides under the control of a first instruction containing transmission power parameter information so as to realize power interactive transmission between different traction buses.
Preferably, the power melting device further includes: the primary side of the first transformer is connected with a traction bus corresponding to the first output, and the secondary side of the first transformer is connected with the first end of the power compensation converter and is used for matching the voltages at the two sides of input and output by using a first transformation ratio; and the primary side of the second transformer is connected with a traction bus corresponding to the second output, and the secondary side of the second transformer is connected with the second end of the power compensation converter and is used for matching the voltages at the two sides of the input and output by using a second transformation ratio.
Preferably, the topology structure of the power compensation converter is selected from one of a two-level converter topology, a three-level converter topology, a multi-level converter topology, a cascaded multi-level converter topology and an MMC structure; the traction transformer is selected from one or a combination of a plurality of transformers selected from a VV transformer, a SCOTT transformer, an impedance matching transformer, an YND11 transformer and a single-phase transformer.
Preferably, the traction power supply device further includes: and the controller is used for generating the transmission power parameter information and converting the transmission power parameter information into the first instruction by utilizing a power balance and electric energy quality comprehensive management algorithm according to the current and the voltage of the first traction bus and the current and the voltage of the second traction bus, so that the power compensation converter can complete a power interactive transmission task and an electric energy quality management task which meet the current balance condition under the control of the instruction.
Preferably, the traction power supply device further includes: and the spare traction transformer is further provided with a controller in the traction power supply device, and the controller is used for controlling the spare traction transformer to be put into use when the traction transformer is overhauled or fails.
One or more embodiments of the above-described solution may have the following advantages or benefits compared to the prior art:
the invention provides a traction power supply device for an electrified traction substation. The traction substation configured by the device still uses the outphasing power supply mode, and the electric split phases of the overhead contact system at the outlet of the traction substation are canceled by adjusting the feeder line connection mode between the traction transformer and the up and down overhead contact systems of the train, so that the full-line through power supply can be realized only by keeping the electric segments of the overhead contact systems, and the utilization of regenerated energy is facilitated. In addition, a power melting device is arranged between the heterogeneous buses, so that the problem of negative sequence of the power grid caused by single-phase load is reduced to the greatest extent, and the traction power supply quality can be improved. The invention can solve a series of problems of train deceleration, phase break and the like caused by electric phase separation while maintaining the advantages of high reliability, simplicity and low cost of the traditional single-phase alternating current traction power supply system, and can further reduce the capacity and loss of a power compensation device (power melting device) arranged between out-phase buses after the power balance between the upper contact net and the lower contact net of a railway, thereby improving the safe and economic operation level of the whole traction substation, meeting the development requirements of high reliability, high energy efficiency, high voltage and high capacity and low cost of traction power supply, and solving the electric energy quality problems of voltage stability, harmonic wave treatment, reactive compensation and the like of traction power supply.
While the invention will be described in conjunction with certain exemplary embodiments and methods of use, those skilled in the art will recognize that they are not intended to limit the invention to these embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention, without limitation to the invention. In the drawings:
fig. 1 is a schematic diagram of a power supply principle of a traction substation in the prior art according to an embodiment of the present application.
Fig. 2 is an overall structure diagram of the split-phase-free traction power supply device of the electrified traction substation according to the embodiment of the application.
Fig. 3 is a detailed structural schematic diagram of the split-phase-free traction power supply device of the electrified traction substation according to the embodiment of the application.
Detailed Description
The following will describe embodiments of the present invention in detail with reference to the drawings and examples, thereby solving the technical problems by applying technical means to the present invention, and realizing the technical effects can be fully understood and implemented accordingly. It should be noted that, as long as no conflict is formed, each embodiment of the present invention and each feature of each embodiment may be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
At present, the electrified railway in China generally adopts a 25kV single-phase power frequency alternating current power supply mode, and a traction substation adopts a 2-circuit high-voltage wire inlet loop and combines a main-standby configuration of a ground traction transformer to improve the reliability of a traction power supply system. However, in order to balance the traction load of a single phase as much as possible in a three-phase power system, traction power supply generally adopts a scheme of alternating phase sequence and split-phase and partitioned power supply, and adjacent power supply sections at the split-phase and partitioned sections are split by a segmented insulator or an anchor segment joint.
Fig. 1 is a schematic diagram of a power supply principle of a traction substation in the prior art according to an embodiment of the present application. As shown in fig. 1, the conventional single-side traction power supply system of the substation presents a structure of two adjacent traction substations and a partition. The traction substation outputs two different phase power supplies, the first phase power supply is connected with one group of uplink and downlink contact net power supply arms through two feeder lines respectively, and the second phase power supply is also connected with the other group of uplink and downlink contact net power supply arms through two feeder lines respectively. The first phase power supply is different from the second phase power supply in phase, so that an electric phase separation is required to be arranged at the output end of the traction substation.
For the phase separation of electricity at the outlet of the traction substation, the current technology of pure single-phase power supply or in-phase power supply is adopted for solving the problem. Pure single-phase power supply is limited by negative sequence and economic index constraint, and is rarely adopted in practical engineering. The in-phase power supply technology can solve the problems of negative sequence and electric phase separation, and a traction power supply system (in-phase traction power supply system) based on the in-phase power supply technology is realized in practical engineering. However, as the in-phase power supply technology needs to use an active power compensation device to realize negative sequence control, along with further increase of railway traction load, the in-phase power supply technology is limited by the restrictions of the in-phase power supply compensation device in terms of cost, reliability, capacity, voltage level and the like, the popularization of the in-phase power supply system still faces larger resistance, and even the latest combined in-phase power supply technology cannot completely meet the development requirements of high reliability, low cost, high voltage, large capacity, high energy efficiency and the like of traction power supply.
Therefore, in order to solve the technical problems, the invention provides a split-phase-free traction power supply device for an electrified traction substation. The device is arranged in the traction substation, so that the traction substation still uses the outphasing power supply mode, but the contact network electric split phase of the substation is eliminated by adjusting the wiring mode of the feeder lines of two phase output ends of the substation (traction transformer T1), and only the contact network electric split phase is reserved. In addition, the power melting device is arranged between the out-phase traction buses, so that the negative sequence problem of the power grid caused by single-phase load is reduced to the greatest extent, meanwhile, the functions of traction power supply voltage stable control, harmonic wave management, reactive compensation and the like can be realized, and the power supply quality of a traction power supply system is improved.
Therefore, the invention can cancel the electric split phase at the outlet of the substation while keeping the high reliability characteristic of the traditional single-phase alternating current traction power supply system. And after the power balance between the contact network and the downlink is realized, the capacity and the loss of the power melting device arranged between the heterogeneous buses can be further reduced, so that the safe and economic operation level of the whole traction substation is improved, and the development requirements of high reliability, high energy efficiency, high voltage and large capacity and low cost of traction power supply are met.
Fig. 2 is an overall structure diagram of the split-phase-free traction power supply device of the electrified traction substation according to the embodiment of the application. Fig. 3 is a detailed structural schematic diagram of the split-phase-free traction power supply device of the electrified traction substation according to the embodiment of the application. The traction power supply device without split phase in the present invention will be described in detail with reference to fig. 2 and 3. In the embodiment of the invention, the traction transformer T1 adopts a three-phase to two-phase wiring mode, so that the traction transformer T1 outputs two-phase power sources, and each phase of power source corresponds to one traction winding. The traction transformer T1 is one or a combination of a plurality of transformers selected from a VV transformer, an SCOTT transformer, an impedance matching transformer, an YND11 transformer, a single-phase transformer and the like.
Further, a first winding corresponding to a first phase output of an output end of the traction transformer T1 is connected with a first running direction contact net (for example, a contact net corresponding to a train in an uplink direction track) and the ground/track, a second winding corresponding to a second phase output of the output end of the traction transformer T1 is connected with a second running direction contact net (for example, a contact net corresponding to a train in a downlink direction track) and the ground/track, a first electric section is arranged on the first running direction contact net at an outlet of the traction transformer T1, and a second electric section is arranged on the second running direction contact net at an outlet of the traction transformer T1. Wherein, the first end of the first winding is connected with two sides of the first electric section respectively, the second end of the first winding is grounded (or connected with the rail), the first end of the second winding is connected with two sides of the second electric section respectively, and the second end of the second winding is grounded (or connected with the rail).
Further, the first winding of the traction transformer T1 is connected with the power supply arm of the contact network in the first driving direction through a first traction bus and a first feeder line. At this time, a first phase power supply output by a traction substation (traction transformer) T1 is led onto a first traveling direction catenary power supply arm by a first traction bus and a first feeder. And because one end of the first winding is respectively connected with the contact networks at the two sides of the first electric section, the traction power supply obtained by the contact networks at the two sides of the first electric section is the same power supply.
Further, the second winding of the traction transformer T1 is connected to the second traveling direction catenary power supply arm through a second traction bus and a second feeder. At this time, a second phase power supply output by a traction substation (traction transformer) T1 is led onto a second traveling direction catenary power supply arm by a second traction bus and a second feeder. And because one end of the second winding is respectively connected with the contact networks at the two sides of the second electric section, the traction power supply obtained by the contact networks at the two sides of the second electric section is the same power supply.
According to the invention, the feeder line connection mode of the output end of the traction transformer is improved, so that the traction power sources obtained by the contact networks in the same driving direction are in phase, and the contact networks in the same driving direction have no electric split phase, namely, the contact networks have no split phase traction power supply, and the safe operation requirement of traction power supply can be met only by setting one electric segment.
Because the traction power sources on the left side and the right side of the first electric section or the second electric section arranged on the contact network in the same running direction come from the same phase output of the traction transformer T1, the traction power transmitted by the contact network on the left side and the right side of the first electric section or the second electric section can reduce the voltage/current unbalance degree on the high-voltage inlet wire side of the traction transformer through the balance power supply principle of the traction transformer T1, thereby relieving the influence of negative sequence current on the public power grid.
Further, the traction power supply device according to the embodiment of the present invention further includes: power-on device 200. The power melting device 200 is arranged between the traction bus in the first driving direction and the traction bus in the second driving direction, and is used for balancing the load difference between the power supplies of the out-of-phase traction buses and improving the traction power supply quality.
The power-on device 200 includes at least: a power compensating converter 201. The first end of the power compensation converter 201 is connected to a first traction bus corresponding to the first phase output, and the second end of the power compensation converter 201 is connected to a second traction bus corresponding to the second phase output. The power compensation converter 201 receives the first instruction, adjusts the ac power at two sides according to the first instruction, flexibly controls the transmission of the ac power between the different windings of the traction transformer, balances the power between the different windings of the traction transformer and improves the traction power supply quality, thereby solving the negative sequence problem of the high-voltage inlet side of the traction transformer. Wherein the first instruction comprises: transmission power parameter information (transmission power parameter information includes the magnitude and direction of power transmission) for controlling the power compensation converter 201 to perform power interactive transmission. The power compensation converter 201 can adjust the ac side voltage of the power compensation converter 201 according to the transmission power parameter information and in combination with the pwm control strategy of the power compensation converter, so as to complete the power transmission control between the two traction buses.
In order to cooperate with the power interactive transmission operation of the power melting device 200, the traction power supply device of the present invention further includes: a controller 100. The controller 100 is configured to obtain, in real time, a current and a voltage of the first traction bus and a current and a voltage of the second traction bus, calculate, by using a power balance and power quality comprehensive management algorithm, a power reference value to be transmitted between heterogeneous traction buses, generate corresponding transmission power parameter information, and then convert the current transmission power parameter information into a first instruction, so as to send the instruction to the power compensation converter 201 in the power melting device 200 through a high-speed communication link, so that the power compensation converter 201 completes, under control of the instruction, a power interactive transmission task and a power quality management task that satisfy a current balance condition (satisfy a power grid side negative sequence power balance requirement). Specifically, the controller 100 is configured to obtain the voltage and the current of the first phase power source and the voltage and the current of the second phase power source output by the traction substation (traction transformer T1), calculate the total input power of the first phase power source and the total input power of the second phase power source, generate a first instruction according to the two power values and the corresponding power balancing and power management algorithm, and send the current first instruction to the power compensation converter 201 through the high-speed communication link, so that the power compensation converter 201 completes the power interactive transmission task and the power quality management task that meet the current negative sequence power balance requirement on the power grid side under the control of the instruction.
Preferably, the topology of the power compensation converter 201 may be selected from one of a two-level converter topology, a three-level converter topology, a multi-level converter topology, a cascaded multi-level converter topology, and an MMC structure. The current transformer may be implemented by various power electronic devices such as IGBT, IGCT, SIC.
Preferably, in the embodiment of the present invention, the power compensation converter 201 may be directly connected to the traction bus, or may be connected by a matching transformer device through step-down. Thus, the power-on device 200 further includes: a first transformer (first matching transformer) 202 and a second transformer (second matching transformer) 203. The primary side (high-voltage side of the transformer) of the first transformer 202 is connected to the first phase output (first traction bus) of the traction transformer T1 and the ground (track), respectively, and the secondary side (low-voltage side of the transformer) of the first transformer 202 is connected to the first side of the power compensation converter 201 for matching the input/output side voltages with the first transformation ratio. The primary side (high-voltage side of the transformer) of the second transformer 203 is connected to the second phase output (second traction bus) of the traction transformer T1 and the ground (track), respectively, and the secondary side (low-voltage side of the transformer) of the second transformer 203 is connected to the second side of the power compensation converter 201 for matching the input/output side voltages with the second transformation ratio.
Thus, in the embodiment of the present invention, the first matching transformer 202, the current transformer 201, and the second matching transformer 203 are connected in series, so as to form the power melting device. Referring to fig. 3, the power melting device 200 is connected to a first traction bus through a first matching transformer TP1, a low-voltage side of the TP1 is connected to a converter, the converter realizes boost output through a second matching transformer TP2, and a high-voltage side of the TP2 is connected to a second traction bus, so that with this structure, bidirectional power transmission between the first traction bus and the second traction bus can be realized.
In addition, in the embodiment of the present invention, the traction power supply device 200 further includes: a spare traction transformer T2. The connection mode of the standby traction transformer T2 is the same as the type, structure and wiring mode of the traction transformer T1, the connection relation with two traction buses, the connection relation with the first running direction contact net and the second running direction contact net, and the like. The controller 100 in the traction power supply device is further used for controlling the standby traction transformer T2 to be put into use when overhauling or failure is performed on the traction transformer T1.
The invention provides a split-phase-free traction power supply device for an electrified traction substation. The traction substation configured by the device still uses the outphasing power supply mode, and the electric split phases of the overhead contact system at the outlet of the traction substation are canceled by adjusting the wiring mode of the feeder lines between the traction transformer and the uplink and downlink overhead contact systems, so that the electric split phases of the overhead contact system are reserved only, the full-line split-phase-free through power supply can be realized, and the utilization of regenerated energy is facilitated. In addition, a power melting device is arranged between the heterogeneous buses, so that the problem of negative sequence of the power grid caused by single-phase loads is reduced to the greatest extent or thoroughly solved, and meanwhile, the traction power supply quality can be improved. The invention can solve a series of problems of train deceleration, phase break and the like caused by electric phase separation while maintaining the advantages of high reliability, simplicity and low cost of the traditional single-phase alternating current traction power supply system, and can further reduce the capacity and loss of a power compensation device (power melting device) arranged between out-phase buses after the power balance between the up-and-down contact networks of a railway, thereby improving the safe and economic operation level of the whole traction substation and meeting the development requirements of high reliability, high energy efficiency, high voltage and large capacity and low cost of traction power supply.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Although the embodiments of the present invention are described above, the embodiments are only used for facilitating understanding of the present invention, and are not intended to limit the present invention. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.
Claims (7)
1. An electrified railway substation split-phase-free traction power supply device, comprising: the traction transformer adopting a three-phase to two-phase wiring mode is characterized in that a first winding corresponding to a first output of the traction transformer is connected with a first driving direction contact net, a second winding corresponding to a second output of the traction transformer is connected with a second driving direction contact net, the first driving direction contact net is provided with a first electric section, the second driving direction contact net is provided with a second electric section, wherein a first end of the first winding is respectively connected with two sides of the first electric section, a second end of the first winding is grounded, a first end of the second winding is respectively connected with two sides of the second electric section, a second end of the second winding is grounded, the first winding is connected with a first driving direction power supply arm through a first traction bus and a first feeder line of a power substation, the second winding is connected with the second driving direction power supply arm through a second traction bus and a second feeder line of the power substation, the non-split phase power supply traction device further comprises a power melting device,
the power melting device is arranged between the first traction bus and the second traction bus and is used for balancing the load difference between the heterogeneous traction buses so as to treat the electric energy quality.
2. The traction power supply of claim 1, wherein the number of first electrical segments is 1 and the number of second electrical segments is 1.
3. The traction power supply of claim 1, wherein the power-on device comprises:
the power compensation converter is positioned between the first traction bus and the second traction bus and is used for adjusting alternating current power at two sides under the control of a first instruction containing transmission power parameter information so as to realize power interactive transmission between different traction buses.
4. The traction power supply of claim 3, wherein the power-on device further comprises:
the primary side of the first transformer is connected with a traction bus corresponding to the first output, and the secondary side of the first transformer is connected with the first end of the power compensation converter and is used for matching the voltages at the two sides of input and output by using a first transformation ratio;
and the primary side of the second transformer is connected with a traction bus corresponding to the second output, and the secondary side of the second transformer is connected with the second end of the power compensation converter and is used for matching the voltages at the two sides of the input and output by using a second transformation ratio.
5. Traction power unit according to claim 3 or 4, characterized in that,
the topological structure of the power compensation converter is selected from one of a two-level converter topology, a three-level converter topology, a multi-level converter topology, a cascading multi-level converter topology and an MMC structure;
the traction transformer is selected from one or a combination of a plurality of transformers selected from a VV transformer, a SCOTT transformer, an impedance matching transformer, an YND11 transformer and a single-phase transformer.
6. The traction power supply device according to any one of claims 3 to 5, characterized in that the traction power supply device further comprises:
and the controller is used for generating the transmission power parameter information and converting the transmission power parameter information into the first instruction by utilizing a power balance and electric energy quality comprehensive management algorithm according to the current and the voltage of the first traction bus and the current and the voltage of the second traction bus, so that the power compensation converter can complete a power interactive transmission task and an electric energy quality management task which meet the current balance condition under the control of the instruction.
7. The traction power supply device according to any one of claims 1 to 6, characterized in that the traction power supply device further comprises: the traction transformer, in reserve, further,
and the controller in the traction power supply device is used for controlling the standby traction transformer to be put into use when the traction transformer is overhauled or fails.
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| CN112865098B (en) * | 2021-03-18 | 2022-10-21 | 中铁电气化局集团有限公司 | Full-through type flexible traction power supply system compatible with out-of-phase power supply |
| CN112977181A (en) * | 2021-03-18 | 2021-06-18 | 清华大学 | Flexible alternating-current traction power supply system for realizing through same phase and operation method thereof |
| CN114604141B (en) * | 2022-04-07 | 2023-04-25 | 西南交通大学 | Bilateral through in-phase power supply system and control method |
| CN114771360B (en) * | 2022-04-21 | 2023-04-07 | 西南交通大学 | Alternating current and direct current traction power supply structure and control method for electrified railway |
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| CN101746282A (en) * | 2010-03-12 | 2010-06-23 | 西南交通大学 | Electrified railroad through power supply system without split phase |
| CN108859874A (en) * | 2017-05-15 | 2018-11-23 | 中车株洲电力机车研究所有限公司 | One kind is completely through alternating current traction power supply system |
| CN109318757A (en) * | 2017-07-31 | 2019-02-12 | 株洲中车时代电气股份有限公司 | A kind of ac tracting network electricity phase-separating section power control device and method |
| CN109494731A (en) * | 2018-12-17 | 2019-03-19 | 成都智创利源科技有限公司 | A kind of through cophase supply system of attached wires of AC electrified railway |
| CN110588449B (en) * | 2019-10-21 | 2023-07-04 | 京沪高速铁路股份有限公司 | Traction substation power supply structure and control method thereof |
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2020
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