CN113859057B - High-speed magnetic levitation power supply system - Google Patents
High-speed magnetic levitation power supply system Download PDFInfo
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- CN113859057B CN113859057B CN202111117511.8A CN202111117511A CN113859057B CN 113859057 B CN113859057 B CN 113859057B CN 202111117511 A CN202111117511 A CN 202111117511A CN 113859057 B CN113859057 B CN 113859057B
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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
- 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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- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
Abstract
According to the high-speed magnetic suspension power supply system provided by the invention, main substations are connected through a medium-voltage ring network in sequence, and a first trunk led out from the output end of the main substation and a second trunk connected to the output end of another main substation form a double-ring network structure; the traction substation comprises a first traction substation and/or a second traction substation. The medium-voltage ring network with the double-ring network structure is connected with each main substation, so that the reliability of an incoming line power supply of the traction substation is ensured; when external power supply points near the traction substation are abundant and the project is easy to implement, the project newly builds a main substation, and the traction substation introduces a power supply from the main substation; when the condition of the external power supply is poor, the traction substation can be connected with two paths of power supplies through the medium-voltage ring network, the medium-voltage ring network is used as a mode for connecting the incoming line power supply of the traction substation by optimizing the structure of the medium-voltage ring network, the requirements of the external power supply and the engineering of the main substation can be effectively reduced, the engineering investment is saved, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of high-speed magnetic levitation, in particular to a high-speed magnetic levitation power supply system.
Background
The existing high-speed magnetic suspension power supply system, such as the Shanghai high-speed magnetic suspension, mainly comprises an external power supply, a main transformer station, a traction power supply system and a power supply system. The traction power supply system is connected with a power supply through a main substation, the power supply system is mainly responsible for the power supply of loads such as lighting of communication facilities along the line and power rails, wherein the main substation is required to be arranged near a station for each traction substation, external power supply resources cannot be fully utilized, and the project investment is increased. The corresponding traction substations of the traction power supply system are large in quantity and distributed positions are restricted by driving requirements such as stations and driving routes; the distribution of the main substations is influenced by external power supply engineering, and the external power supplies are often unevenly distributed in a long and large trunk line, so that the main substations need to be newly arranged nearby, and unnecessary cost is increased.
Therefore, in combination with the requirement of high-speed magnetic levitation power supply, a power supply system suitable for high-speed magnetic levitation engineering of long and large trunk lines is needed. On the premise of meeting the running requirements of the maglev train, external power resources are fully utilized, and the investment of the maglev power supply system engineering is reduced.
Disclosure of Invention
The present invention provides a high-speed magnetic levitation power supply system for solving the above-mentioned defects of the prior art.
The invention provides a high-speed magnetic suspension power supply system, which comprises an external power supply, a plurality of main substations and a plurality of traction substations, wherein the external power supply is electrically connected with the input ends of the main substations, the main substations are connected through a medium-voltage ring network in sequence, and a first trunk is led out from the output end of each main substation, and a second trunk is connected to the output end of another main substation to form a double-ring network structure;
the traction substation comprises a first traction substation and/or a second traction substation;
each first traction substation is electrically connected with the output end of one main substation;
the second traction substation is electrically connected with the double-ring network structure; and each second traction substation is provided with two groups of incoming lines and outgoing lines, wherein one group of incoming lines and outgoing lines are electrically connected with the first trunk line, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line.
The high-speed magnetic suspension power supply system further comprises a rail side substation;
the rail side power transformation is arranged beside each traction power transformation substation;
the trackside substation is electrically connected with the double-ring network structure;
and each trackside substation is provided with two groups of incoming lines and outgoing lines, wherein one group of incoming lines and outgoing lines are electrically connected with the first trunk line, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line.
According to the high-speed magnetic suspension power supply system provided by the invention, each incoming line and each outgoing line are electrically connected with the first trunk line or the second trunk line through the interconnection switch.
According to the high-speed magnetic suspension power supply system provided by the invention, a group of incoming lines and outgoing lines connected with the first trunk line are connected through a first bus; the group of incoming lines and the group of outgoing lines connected with the second trunk line are connected through a second bus;
a section switch is arranged between the first bus and the second bus of each second traction substation; and a section switch is arranged between the first bus and the second bus of each rail-side substation.
According to the high-speed magnetic suspension power supply system provided by the invention, when the first main line and the second main line work normally, the section switch is set to be in an off state; when the first main line or the second main line has faults, the section switch is set to be in a closed state, and the corresponding first bus bar and the corresponding second bus bar are connected.
According to the high-speed magnetic suspension power supply system provided by the invention, the voltage of the external power supply connected with the main transformer is more than 220kV.
According to the high-speed magnetic suspension power supply system provided by the invention, the voltage of the first trunk line and the voltage of the second trunk line in the medium-voltage ring network are both 35kV.
According to the high-speed magnetic suspension power supply system provided by the invention, the trackside power substation is connected with the communication equipment, the lighting equipment and the power equipment and used for supplying electric energy to the communication equipment, the lighting equipment and the power equipment.
According to the high-speed magnetic suspension power supply system provided by the invention, each traction substation is respectively connected with the long-top linear synchronous motor.
According to the high-speed magnetic suspension power supply system, the medium-voltage ring network with the double-ring network structure is connected with each main substation, so that the reliability of an incoming line power supply of a traction substation is ensured; when external power points near the traction substation are abundant and the project is easy to implement, the project newly builds a main substation, and the traction substation introduces a power supply from the main substation; when the condition of the external power supply is poor, the traction substation can be connected with two paths of power supplies through the medium-voltage ring network, the medium-voltage ring network is used as a mode for connecting the incoming line power supply of the traction substation by optimizing the structure of the medium-voltage ring network, the requirements of the external power supply and the engineering of the main substation can be effectively reduced, the engineering investment is saved, and the construction cost is reduced.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a high-speed magnetic levitation power supply system according to the present invention;
fig. 2 is a second schematic structural diagram of a high-speed magnetic levitation power supply system provided in the present invention;
FIG. 3 is a schematic diagram of a magnetic levitation power supply system in the prior art;
fig. 4 is a third structural schematic diagram of a high-speed magnetic levitation power supply system provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The high-speed magnetic suspension power supply system provided by the invention is suitable for supplying power for a long-reach main line; the highest speed per hour of high-speed maglev can reach 400km/h usually, the running speed per hour of medium-low speed maglev is lower than 200km/h usually, wherein, the high-speed maglev train belongs to intermittent high-power load, in the prior art, in order to guarantee the power supply of the maglev train, a main transformer station is required to be built nearby usually, and the main transformer station is required to be connected with an external power supply, so that the construction of the high-speed maglev needs to change the external power supply greatly, and different main transformer stations and traction power distribution stations are required to be equipped for different stations, and the engineering cost is high;
the existing high-speed magnetic levitation line only has a test line about 30km from Pudonglong Yang Lu to Pudong airport in Shanghai, a 20kV voltage single-ring network is adopted for a power supply system of the line, and the single-ring network has the advantages of few cable harnesses, low cost and low reliability and can cause that part of loads cannot normally supply power once part of original elements in the network have faults; as shown in fig. 3, a single-ring network connection is adopted between the trackside substations.
In one embodiment, as shown in fig. 1-2, the high-speed magnetic levitation power supply system provided by the present invention includes an external power supply, a plurality of main substations and a plurality of traction substations, wherein the external power supply is electrically connected to input terminals of the main substations, the main substations are sequentially connected by a medium-voltage ring network, and output terminals of the main substations lead out a first trunk and a second trunk are connected to output terminals of another main substation to form a dual-ring network structure;
the traction substation comprises a first traction substation and/or a second traction substation;
each first traction substation is electrically connected with the output end of one main substation;
the second traction substation is electrically connected with the double-ring network structure; each second traction substation is provided with two groups of incoming lines and outgoing lines, wherein one group of incoming lines and outgoing lines are electrically connected with the first trunk line, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line;
specifically, the power supply mode of a traction substation is adjusted according to specific construction conditions with a residential power substation, a first traction substation is directly connected with a main substation, and a second traction substation is connected with a medium-voltage ring network;
when external power supply points near the traction substation are abundant and the project is easy to implement, newly building a corresponding main substation to be connected with a corresponding external power supply, and introducing power into the traction substation from the main substation; when the external power supply condition is poor, the traction substation can be connected with two paths of power supplies through a medium-voltage ring network;
specifically, as shown in fig. 1-2 and 4, every two main substations are connected through a first trunk line and a second trunk line, an output end of the main substation is connected with a previous main substation through the first trunk line and the second trunk line, and is also connected with a next main substation through the first trunk line and the second trunk line, the number of the output ends of the main substations is not limited by the present invention, and the number of the main substations is also not limited by the present invention, and fig. 1 and 2 are only examples of the present invention, and should not be considered as limitations of the present invention, and every two main substations are connected through a medium voltage ring network with a double ring network structure;
in one embodiment, as shown in fig. 1-2 and 4, a group of the incoming lines and the outgoing lines connected with the first trunk line are connected through a first bus; the group of incoming lines and the group of outgoing lines connected with the second trunk line are connected through a second bus;
a section switch is arranged between the first bus and the second bus of each second traction substation; a section switch is arranged between the first bus and the second bus of each trackside substation;
optionally, in one embodiment, one group of incoming lines and outgoing lines is electrically connected with the first trunk line led out by the adjacent main power transformation through the interconnection switch;
specifically, as shown in fig. 1-2 and 4, a first trunk line led out from an adjacent main substation or a rail-side power supply substation is connected with a tie switch through one group of incoming lines and further connected with the rail-side substation, and the same group of outgoing lines of the rail-side substation is connected with the tie switch and further connected with the first trunk line; a second main line led out by the main substation is connected with an interconnection switch through another group of incoming lines and further connected with the trackside substation, and the same group of outgoing lines of the trackside substation are connected with the interconnection switch and further connected with the second main line;
optionally, a group of incoming lines and outgoing lines connected to the second traction substation and the first trunk line are connected through a first bus; the other group of incoming lines and outgoing lines connected with the second trunk line are connected through a second bus;
specifically, as shown in fig. 1-2 and 4, a first main line led out from an adjacent main substation or a rail-side power supply substation is connected to one interconnection switch through one group of incoming lines, and is further connected to a corresponding first bus, and is connected to the second traction substation through the first bus, and supplies power to the second traction substation, and the other end of the first bus is connected to the same group of outgoing lines, and is further connected to one interconnection switch, and is connected to the first main line through the interconnection switch; a second main line led out by the main substation is connected with an interconnection switch through one group of inlet wires and further connected to a corresponding second bus, and is connected with the second traction substation through the second bus and supplies power to the second traction substation;
optionally, a section switch is arranged between the first bus and the second bus of the single second traction substation; when the first main line and the second main line work normally, the section switch is set to be in an off state; when the first trunk line or the second trunk line has a fault, the section switch is set to be in a closed state, and the corresponding first bus bar and the corresponding second bus bar are connected;
specifically, by optimizing the voltage grade and the structure of the medium-voltage ring network, the incoming line power supply connection mode of the traction substation is changed, so that the external power supply and the main substation project can be reduced, particularly in the area where the external power supply is relatively weak, the project investment can be greatly saved, and the project implementation difficulty can be reduced.
In one embodiment, as shown in fig. 1-2, the high-speed magnetic levitation power supply system provided by the invention further comprises a plurality of trackside substations;
optionally, the rail-side power transformation is arranged beside each traction substation; one traction substation corresponds to one trackside substation;
optionally, the trackside substation is connected with a power supply system, a communication system and a power rail of a corresponding station, and supplies power to the power supply system, the communication system and the power rail;
as shown in fig. 1 and 2, the trackside substation is electrically connected to the double ring network structure;
each trackside substation is provided with two groups of incoming lines and outgoing lines, wherein one group of incoming lines and outgoing lines are electrically connected with the first trunk line led out by the adjacent main substation, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line led out by the adjacent main substation;
optionally, in an embodiment, one group of incoming lines and outgoing lines is electrically connected with the first trunk line led out by the adjacent main power transformer through a tie switch;
specifically, as shown in fig. 1-2 and 4, a first main line led out from a main substation is connected to an interconnection switch through one group of incoming lines and further connected to the trackside substation, and the same group of outgoing lines of the trackside substation are connected to the interconnection switch and further connected to the first main line; a second main line led out by the main substation is connected with an interconnection switch through another group of incoming lines and further connected with the trackside substation, and the same group of outgoing lines of the trackside substation are connected with the interconnection switch and further connected with the second main line;
optionally, a group of incoming lines and outgoing lines of the trackside power supply station connected with the first trunk line are connected through a first bus; the other group of incoming lines and outgoing lines connected with the second trunk line are connected through a second bus;
specifically, as shown in fig. 1-2 and 4, a first main line led out from a main transformer substation is connected to an interconnection switch through one group of incoming lines and further connected to a corresponding first bus, the first main line is connected to a rail-side substation through the first bus and supplies power to a rail-side power supply substation, the other end of the first bus is connected to the same group of outgoing lines, and is further connected to an interconnection switch and connected to the first main line through the interconnection switch; a second trunk line led out by the main substation is connected with an interconnection switch through one group of inlet wires and further connected to a corresponding second bus, the second trunk line is connected with the trackside substation through the second bus and supplies power to the trackside power supply station, the other end of the second bus line is connected with the same group of outlet wires, and further connected with the interconnection switch and is connected to the second trunk line through the interconnection switch;
optionally, a section switch is arranged between the first bus and the second bus of the single trackside substation; when the first main line and the second main line work normally, the section switch is set to be in an off state; when the first main line or the second main line has a fault, the section switch is set to be in a closed state, and the corresponding first bus and the corresponding second bus are connected;
the section switch is in a normally open state, and is closed only when a fault occurs in a cable in a line, a connected power supply station beside a rail, one section of bus or a main line, so that power is supplied to elements in the system through the other main line or bus, and the condition that the fault cannot be normal due to the fault is avoided.
Preferably, the voltage of the external power supply to which the main transformer is connected is greater than 220kV; the main substation is connected with two paths of power supplies through an external power supply, and the voltage level of the power supply of the main substation is preferably 220kV or more in order to ensure the electric energy transmission power and reduce the influence on the electric energy quality of an electric power system in consideration of the intermittent high-power load of a high-speed magnetic-levitation train.
Preferably, the voltage of the first trunk line and the second trunk line in the medium-voltage ring network are both 35kV; specifically, the main substation is connected with two paths of power supplies through an external power supply, 35kV is fed out to a medium-voltage ring network, the traction power supply system is connected with two paths of incoming power supplies, and the incoming power supplies are subjected to voltage transformation and frequency conversion through a traction module and output to a linear motor through a stator switch station to drive a train to be dragged/braked; meanwhile, in order to reduce the line loss, the voltage level of the medium-voltage ring network adopts 35kV to improve the electric energy transmission capacity.
In one embodiment, the trackside substation is connected with communication equipment, lighting equipment and power equipment and is used for supplying electric energy to the communication equipment, the lighting equipment and the power equipment;
the communication equipment comprises but is not limited to a signal device, a station entering prompting device and a travel speed control device; lighting devices include, but are not limited to, lighting fixtures at a station, signal lights of a train, etc.; power equipment includes, but is not limited to, equipment other than providing tractive effort, such as pumps, power rails, etc.;
each traction substation is connected with a corresponding stator switch station and a corresponding stator section and is used for providing traction and braking force for the magnetic suspension train;
optionally, the traction substation further includes a rectifier, an inverter, a dc synchronous motor, a brake resistor, and a super capacitor device.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A high-speed magnetic suspension power supply system comprises an external power supply, a plurality of main substations and a plurality of traction substations, wherein the external power supply is electrically connected with the input ends of the main substations;
the traction substation comprises a first traction substation and/or a second traction substation;
each first traction substation is electrically connected with the output end of one main substation;
the second traction substation is electrically connected with the double-ring network structure; each second traction substation is provided with two groups of incoming lines and outgoing lines, one group of incoming lines and outgoing lines are electrically connected with the first trunk line, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line.
2. A high speed magnetic levitation power supply system as recited in claim 1 further comprising a trackside substation;
the rail side power transformation is arranged beside each traction power transformation substation;
the trackside substation is electrically connected with the double-ring network structure;
and each trackside substation is provided with two groups of incoming lines and outgoing lines, wherein one group of incoming lines and outgoing lines are electrically connected with the first trunk line, and the other group of incoming lines and outgoing lines are electrically connected with the second trunk line.
3. A high speed magnetic levitation power supply system as recited in claim 2, wherein a set of said incoming lines and said outgoing lines connected to said first main line are connected by a first bus; the group of incoming lines and the group of outgoing lines which are connected with the second trunk line are connected through a second bus;
a section switch is arranged between the first bus and the second bus of each second traction substation; and a section switch is arranged between the first bus and the second bus of each trackside substation.
4. A high speed magnetic levitation power supply system as recited in claim 2 wherein each of said incoming line and said outgoing line is electrically connected to said first rail or said second rail through a tie switch.
5. A high-speed magnetic levitation power supply system as recited in claim 3, wherein when the first main line and the second main line are working normally, the section switch is set to an off state; when the first main line or the second main line has faults, the section switch is set to be in a closed state, and the corresponding first bus bar and the corresponding second bus bar are connected.
6. A high-speed magnetic-levitation power supply system as recited in claim 1,
the voltage of the external power supply to which the main transformer is connected is greater than 220kV.
7. A high-speed magnetic-levitation power supply system as recited in claim 1,
and the voltage of the first trunk line and the second trunk line in the medium-voltage ring network is 35kV.
8. The high-speed magnetic levitation power supply system as recited in claim 2, wherein the trackside substation is connected with communication equipment, lighting equipment and power equipment for supplying power to the communication equipment, the lighting equipment and the power equipment.
9. A high speed magnetic levitation power supply system as recited in claim 1 wherein each said traction substation is connected to a long-top linear synchronous motor.
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| CN202111117511.8A CN113859057B (en) | 2021-09-23 | 2021-09-23 | High-speed magnetic levitation power supply system |
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| CN202111117511.8A CN113859057B (en) | 2021-09-23 | 2021-09-23 | High-speed magnetic levitation power supply system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102328601A (en) * | 2011-09-13 | 2012-01-25 | 北京千驷驭电气有限公司 | Energy-feedback tractive power supply system with high power factor and high cost performance |
| CN106740248A (en) * | 2017-01-24 | 2017-05-31 | 株洲中车时代电气股份有限公司 | A kind of tractive power supply system of high-speed magnetic levitation traffic system and its train |
| CN110861539A (en) * | 2019-12-13 | 2020-03-06 | 中铁第四勘察设计院集团有限公司 | Main wiring structure of hub traction substation |
| CN111969585A (en) * | 2020-06-28 | 2020-11-20 | 中铁第一勘察设计院集团有限公司 | Traction substation power supply system with three power supplies |
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2021
- 2021-09-23 CN CN202111117511.8A patent/CN113859057B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102328601A (en) * | 2011-09-13 | 2012-01-25 | 北京千驷驭电气有限公司 | Energy-feedback tractive power supply system with high power factor and high cost performance |
| CN106740248A (en) * | 2017-01-24 | 2017-05-31 | 株洲中车时代电气股份有限公司 | A kind of tractive power supply system of high-speed magnetic levitation traffic system and its train |
| CN110861539A (en) * | 2019-12-13 | 2020-03-06 | 中铁第四勘察设计院集团有限公司 | Main wiring structure of hub traction substation |
| CN111969585A (en) * | 2020-06-28 | 2020-11-20 | 中铁第一勘察设计院集团有限公司 | Traction substation power supply system with three power supplies |
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