CN217994213U - Multi-system traction power supply system - Google Patents
Multi-system traction power supply system Download PDFInfo
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- CN217994213U CN217994213U CN202221713887.5U CN202221713887U CN217994213U CN 217994213 U CN217994213 U CN 217994213U CN 202221713887 U CN202221713887 U CN 202221713887U CN 217994213 U CN217994213 U CN 217994213U
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Abstract
The utility model discloses a multi-standard pulls power supply system, including vary voltage subassembly, switch module, protection subassembly, measuring subassembly, contact net subassembly, contact rail subassembly, walk capable backward flow subassembly and coupling assembling. The transformation component comprises a direct current and alternating current traction transformation power supply part; the switch assembly comprises a circuit breaker and a disconnecting switch; the protective component comprises a steel rail potential limiting/grounding device and a lightning arrester; the measuring component comprises a current transformer and a current divider; the contact net component comprises a multi-standard contact net and an electric phase splitting device; the contact rail assembly comprises a multi-system contact rail; the walking backflow component comprises a walking rail, a backflow box, an insulation junction, a stray current collecting net and a drainage cabinet; the connection assembly includes various connection cables. The utility model discloses a function of the multiple power supply system of single line, but make full use of circuit and power supply capacity, multiple system train is driven, reduces equipment configuration, saves the engineering investment.
Description
Technical Field
The utility model relates to an urban rail transit technical field and electric railway technical field particularly, relate to a power supply system is pull to many systems.
Background
At present, power supply systems of electric railways such as intercity railways, ordinary railways, urban railways, high-speed railways and the like and urban rail transit generally adopt a single power supply system; the railway traction power supply system usually adopts an alternating current traction power supply system (alternating current 27.5kV or 2 multiplied by 27.5 kV), and the urban rail transit usually adopts direct current 1500V or 750V for power supply. Corresponding to a track line, an alternating current electrified railway and urban rail transit also commonly adopt a system contact network or a contact rail for power supply.
In recent years, with the rapid development of electrified railways and urban rail transit, some places where different traffic types are crossed appear on lines such as subways, inter-city railways, urban railways, high-speed railways and the like, the different lines need better interconnection and intercommunication and power supply system function overall, or some places where various systems need power supply such as debugging lines, test lines and the like, and the traditional single power supply system cannot meet the requirement of multi-system power supply.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power supply system is pull to many systems aims at solving along with traffic system's rapid development, and the place that some different traffic patterns that appear cross, perhaps some debugging lines, test line etc. need pull the place of the multi-system power supply of power supply system, and the needs that traditional single power supply system can't satisfy the power supply of many systems or are unfavorable for the problem of resource saving according to the relevant engineering repeated construction of single system.
The utility model discloses a realize like this, a multi-standard pulls power supply system, including vary voltage subassembly, switch module, protection subassembly, measuring subassembly, contact net subassembly, contact rail subassembly, walk capable backward flow subassembly, coupling assembling. The transformation component comprises a direct current traction transformation power supply part and an alternating current traction transformation power supply part; the switch assembly comprises a circuit breaker and a disconnecting switch; the protection component comprises a steel rail potential limiting/grounding device and a lightning arrester; the measuring component comprises a current transformer and a current divider (a voltage transformer, a voltage transmitter, a live display and the like are arranged at proper positions according to requirements); the contact net assembly comprises a multi-standard contact net and an electric phase splitting device between the contact nets; the contact rail assembly comprises a positive contact rail and a negative contact rail when the positive contact rail and the negative contact rail are required to be arranged, and a return contact rail is arranged when the positive contact rail and the negative contact rail are not required to be arranged; the walking backflow component comprises walking rails (backflow rails during backflow), a backflow box, insulation junctions among the walking backflow rails, a stray current collecting net and a drainage cabinet; the connecting assembly comprises a connecting cable, a connecting wire, a copper busbar and the like (the connecting assembly adopts a suitable form according to engineering conditions).
Preferably, the direct current traction voltage transformation power supply part transforms one or more connected power supply sources into power supply output of one or more direct current systems according to actual engineering (DC 3000V, DC1500V, DC V, DC600V, DC + -1500V, D + -750V, DC + -375V or other direct current systems); one end of the direct current traction voltage transformation power supply part is connected to the contact line through the circuit breaker, the shunt, the disconnecting switch and the connecting assembly, and is connected to the positive contact rail through the disconnecting switch (the direct current traction voltage transformation power supply part can be directly connected to the contact rail through the circuit breaker, the shunt, the disconnecting switch and the connecting assembly, and the direct current traction voltage transformation power supply part is used for providing power for the contact rail in an independent loop mode, the contact rail can be disconnected when power is supplied by the contact line, one end of the direct current traction voltage transformation power supply part is connected to the return box through the disconnecting switch (the walking rail and the contact rail can share one return box to return or respectively return independently according to engineering conditions, and the switching assembly is arranged according to needs), and the other end of the direct current traction voltage transformation power supply part is connected to the current drainage cabinet through the disconnecting switch.
Preferably, the alternating-current traction voltage transformation power supply part transforms one or more connected power supply sources into one or more alternating-current system power supply outputs (AC 25kV, AC2 × 25kV, AC20kV, AC 11-15 kV or other alternating-current systems) according to engineering practice; one end is connected with a contact net through the circuit breaker, the current transformer, the isolating switch and the connecting assembly, and the other end is connected with the return box (the switch assembly is arranged as required) through the isolating switch and the current transformer.
Preferably, the switch assembly comprises a circuit breaker and an isolating switch, and is connected with the transformation assembly and the contact network assembly, the transformation assembly and the contact rail assembly, the transformation assembly and the traveling reflux assembly, a multi-system line and an alternating current system or direct current system line and the like according to requirements.
Preferably, the protection component comprises a steel rail potential limiting/grounding device and a lightning arrester. One end of the steel rail potential limiting/grounding device is connected with the walking rail, and the other end of the steel rail potential limiting/grounding device is grounded; and arranging the lightning arrester reasonably according to the requirements at the positions of a power supply inlet side, a direct current traction voltage transformation power supply part, an alternating current traction voltage transformation power supply part inlet and outlet side, an alternating current bus and a feed-out line, a direct current bus and feed-out line, a contact network, a contact rail and the like according to the engineering conditions.
Preferably, the measuring component comprises a current transformer and a current divider, and a voltage transformer, a voltage transmitter, a live display and the like are arranged at appropriate positions as required to measure the current, the voltage, the live or not and the like of the relevant loop.
Preferably, the contact network assembly comprises a multi-system contact network and an electric phase splitting device between the contact networks, one end of the contact network is connected to the direct-current traction power supply part through the switch assembly and the measuring assembly, the other end of the contact network is connected to the alternating-current traction power supply part through the switch assembly and the measuring assembly, and the corresponding switch assembly is closed or disconnected according to engineering requirements to supply power to the locomotive in a required power supply system. The electric phase splitting device between the contact networks of the lines of different systems is connected with the multi-system line through one end of the switch assembly and the measuring assembly, and the other end is connected with the alternating current system or direct current system line.
Preferably, the contact rail assembly comprises a positive contact rail and a negative contact rail when the positive contact rail and the negative contact rail need to be arranged, and a return contact rail is arranged when the positive contact rail and the negative contact rail do not need to be arranged. When an anode contact rail and a cathode contact rail are arranged, the anode contact rail of the contact rail assembly is connected to an anode bus of the direct-current traction power supply part through a switch assembly and a measuring assembly, and the cathode contact rail is connected to a return box (the switch assembly is arranged according to working conditions) through the switch assembly and then is connected to a cathode bus of the direct-current traction power supply part; when a return contact rail is arranged, if the contact rail is only connected with the positive bus of the direct-current traction power supply part, the contact rail is not connected with the return box and the negative bus; when a return contact rail is arranged, if the contact rail is only connected with the negative bus of the direct current traction power supply part, the contact rail is not connected with the positive bus of the direct current traction power supply part.
Preferably, the walking backflow assembly comprises walking rails (the backflow rails are used during backflow), a backflow box, an insulation junction between the walking backflow rails, a stray current collecting net and a drainage cabinet. The walking rail (return rail) is connected to the return box through a switch assembly (the switch assembly can be omitted according to working conditions); insulation junctions among the running reflux rails of different-system lines are connected with the running rails of the multi-system lines through one end of a switch assembly, and one end of the switch assembly is connected with the running rails of an alternating current system or a direct current system; one end of the drainage cabinet is connected with the direct-current negative bus, one end of the drainage cabinet is connected with the substation ground busbar, and the other end of the drainage cabinet is connected with the stray current collecting net through the drainage terminal.
Preferably, the connecting assembly adopts suitable electric connecting wires such as connecting cables, connecting wires and copper busbars according to the field requirements.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a multi-standard traction power supply system, through rationally setting up vary voltage subassembly, switch module, protection subassembly, measuring subassembly, contact net subassembly, contact rail subassembly, walking backward flow subassembly, coupling assembling, according to the engineering needs, can realize multiple power supply system at the same track circuit, can possess the function of alternating current power supply or direct current power supply as required; the power supply of a contact net and a contact rail can be realized simultaneously or respectively on the same track line; the power supply of alternating current 25kV, 2 × 25kV, 20kV, 11-15 kV or other alternating current systems can be realized on the same track line according to working conditions, and the power supply of direct current 3000V, 1500V, 750V, 600V, ± 1500V, ± 750V, ± 375V or other direct current systems can also be realized according to the working conditions; the device can run in a through mode or a sectional mode when the device is powered with the same system as an adjacent line and run in an electric phase splitting mode when the device is powered with different phases or systems with the adjacent line. The system can realize self-healing and reconstruction after failure when wide-area protection is adopted; providing an interconnection and intercommunication scheme for rail transit of different systems; the insulation and current carrying capacities of the shared equipment part are respectively set according to high voltage and large current in the implementation system, the function of multiple power supply systems of a single line is achieved, the line and the power supply capacity can be fully utilized, multiple systems of trains are driven, the interconnection and intercommunication of the multiple systems of trains are achieved, the occupied area is reduced, the equipment configuration is reduced, and the engineering investment is greatly saved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the embodiments 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
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a common power supply circuit for a positive contact rail, a negative contact rail and a grid rail in a multi-system traction power supply system.
Fig. 2 is a schematic diagram of the positive and negative contact rails and the independent power supply circuit of the network rail in the multi-system traction power supply system of the present invention.
Fig. 3 is a schematic diagram of the connection between the contact rail and the dc positive bus in the multi-system traction power supply system of the present invention.
Fig. 4 is a schematic diagram of the connection between the contact rail and the dc negative bus in the multi-system traction power supply system of the present invention.
The mark in the figure is: 1. a circuit breaker; 2. an isolating switch; 3. rail potential limiting/grounding devices; 4. a drainage cabinet; 5. a lightning arrester; 6. a current transformer; 7. a flow divider; 8. an electrical phase splitting device; 9. and (4) insulating the junction.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Examples
As shown in fig. 1 to 4, the present embodiment provides a multi-system traction power supply system, which includes a voltage transformation assembly, a switch assembly, a protection assembly, a measurement assembly, a contact network assembly, a contact rail assembly, a traveling reflux assembly, and a connection assembly. The transformation component comprises a direct current traction transformation power supply part and an alternating current traction transformation power supply part. The switch assembly comprises a circuit breaker and a disconnecting switch. The protection component comprises a steel rail potential limiting/grounding device and a lightning arrester; the measuring component comprises a current transformer and a current divider (in addition, a voltage transformer, a voltage transmitter, a live display and the like are arranged at proper positions according to requirements); the contact net assembly comprises a multi-standard contact net and an electric phase splitting device between the contact nets; the contact rail assembly is provided with a return contact rail when the positive and negative contact rails are not required to be arranged, and comprises a positive contact rail and a negative contact rail when the positive and negative contact rails are required to be arranged; the walking backflow assembly comprises walking rails (backflow rails during backflow), a backflow box, insulation junctions among the walking backflow rails of different systems of lines, a stray current collecting net and a drainage cabinet; the connecting assembly comprises a connecting cable, a connecting wire, a copper busbar and the like (the connecting assembly adopts a suitable form according to engineering conditions).
By reasonably arranging the voltage transformation assembly, the switch assembly, the protection assembly, the measurement assembly, the contact network assembly, the contact rail assembly, the traveling backflow assembly and the connecting assembly, multiple power supply systems can be realized on the same track line according to engineering requirements, and the device can have the function of alternating current power supply or direct current power supply according to requirements; the power supply of a contact net and a contact rail can be realized simultaneously or respectively on the same track line; the power supply of alternating current 25kV, 2 × 25kV, 20kV, 11-15 kV or other alternating current systems can be realized on the same track line according to working conditions, and the power supply of direct current 3000V, 1500V, 750V, 600V, ± 1500V, ± 750V, ± 375V or other direct current systems can also be realized according to the working conditions; the power supply system can run in a through mode or a sectional mode when the power supply system can be communicated with the same system power supply of the adjacent line, and run in an electric phase splitting mode when the power supply system is out of phase with the adjacent line or the system is different. When wide area protection is adopted, self-healing and reconstruction after system failure can be realized, wherein the insulation and current carrying capacity of the shared equipment part are respectively set according to high voltage and large current in a realization mode. The utility model discloses a function of the multiple power supply system of single line can make full use of circuit and power supply capacity, drives multiple system train, realizes the interconnection of multiple system train, reduces and takes up an area of, reduces the equipment configuration, saves the engineering investment greatly. The circuit implementation mode is as follows:
direct current and alternating current power supplies for a contact net and a contact rail can be introduced through the same traction substation and can also be introduced through different traction substations and power lines.
Before a power supply is introduced into a contact net and a contact rail, switch components such as a circuit breaker and a disconnecting switch, and suitable measuring components, protecting components, connecting components and the like are arranged.
A contact net is arranged above the walking rail, a contact rail is arranged beside the walking rail, and the walking rail and the contact rail are installed in an insulating mode. And setting a corresponding stray current collection network according to the line condition.
And at the joint of the line and other lines, arranging an electric segmentation/electric phase splitting device between contact networks according to working conditions, determining whether an insulation junction between the running reflux rails is arranged according to the working conditions, and arranging a corresponding switch assembly, a corresponding measuring assembly, a corresponding protection assembly, a corresponding connecting assembly and the like.
The line can realize AC25kV, AC 2X 25kV, AC20kV, AC 11-15 kV, DC3000V, DC V, DC750V, DC V, DC +/-1500V, DC +/-750 +/-V, DC +/-375V or other AC and DC systems for power supply; one voltage system or a plurality of voltage systems can be adopted according to working conditions. When power is supplied by adopting various voltage systems, the insulation and current carrying capacities of shared electrical equipment, a contact network, a contact rail, a traveling rail, a return box, an electric phase splitter, an insulation junction, a cable, a wire and other equipment facilities are respectively set according to high voltage and large current in the implementation systems, and related voltage parameters and current parameters meet the sharing requirements. When only one type of output is needed, the output is considered according to one type of output.
1. AC25kV, AC2 is multiplied by 25kV, AC20kV, AC 11-15 kV, other AC standard realization modes:
the alternating-current traction transformation power supply part transforms one or more connected power supply sources into power supply systems (AC 25kV, AC 2X 25kV, AC20kV, AC 11-15 kV or other alternating-current systems) required by the contact network through transformation, inversion, distribution and the like, feeds the power supply systems out through a power supply loop, is connected to the contact network through a switch assembly to supply power to a locomotive, and reflows through a reflow loop. If the introduced power supply system is the same as the power supply system of the contact network, the power supply can be directly connected to the contact network through the switch assembly.
The rail potential limiting/grounding device adopts a grounding mode or a rail potential limiting mode.
Fig. 1 and 4: the alternating current return isolating switch 6011, the traveling rail return isolating switch 4005, the alternating current feeder line surfing switch 2111 and the alternating current feeder line breaker 211 are in closed position. Fig. 2 and 3: 4005 is not provided and the running rails are already directly connected to the return box, otherwise the same as in fig. 1.
When the power supply line adopts an AC2 multiplied by 25kV AT power supply mode, the related circuit breakers, isolating switches, measuring components, protecting components, connecting components and the like of the power supply circuit are arranged according to the AT power supply mode.
2. DC3000V, DC1500V, DC V, DC V, other DC direct current system implementation:
the direct current traction voltage transformation power supply part transforms one or more connected power supplies into a power supply system required by a contact net and/or a contact rail through voltage transformation rectification, distribution and the like, feeds out the power supply system through a power supply loop, is connected to the contact net and/or the contact rail through a switch assembly, a protection assembly and a measurement assembly to supply power to a locomotive, reflows through a backflow loop, and collects stray current through a stray current collection net loop.
(1) Power supply for contact network
The direct current traction power supply adopts a contact network power supply mode.
The rail potential limiting/grounding device adopts a rail potential limiting mode.
Fig. 1 and 4: a stray current loop isolating switch 7011 is in a closed position, and a direct current return isolating switch 6012, a walking rail return isolating switch 4005, a direct current contact net feeder net surfing switch 2121 and a direct current feeder breaker 212 are in a closed position. Fig. 2 and 3: 4005 is not provided and the running rails are already directly connected to the return box, otherwise the same as in fig. 1.
(2) Power supply for contact rail
The rail potential limiting/grounding device adopts a rail potential limiting mode.
1) Positive contact rail power supply and running rail reflux
FIG. 1: stray current loop disconnecting switch 7011 is in a closed position, and direct current return disconnecting switch 6012, traveling rail return disconnecting switch 4005, direct current contact rail feeder line disconnecting switch 2122 and direct current feeder line breaker 212 are in a closed position.
FIG. 2: stray current loop isolator 7011 is closed, and dc return isolator 6012, dc contact rail feeder isolator 2131 and dc feeder breaker 213 are closed.
FIG. 3: stray current loop isolator 7011 is closed, and dc return isolator 6012, dc contact rail feeder isolator 2122, and dc feeder breaker 212 are closed.
2) Positive contact rail power supply and negative contact rail reflux
FIG. 1: the dc return isolator 6012, the contact rail return isolator 5001, the dc contact rail feeder isolator 2122, and the dc feeder breaker 212 are closed.
FIG. 2: a contact rail reflux isolating switch 6013, a direct current contact rail feeder line isolating switch 2131 and a direct current feeder line breaker 213 are closed.
(3) Contact net and contact rail power supply simultaneously
The rail potential limiting/grounding device adopts a potential limiting mode.
1) The contact net and the contact rail are simultaneously powered, and the running rail returns
FIG. 1: a stray current loop isolating switch 7011 is in a closed position, and a direct current return isolating switch 6012, a walking rail return isolating switch 4005, a direct current contact net feeder net surfing switch 2121, a direct current contact rail feeder isolating switch 2122 and a direct current feeder breaker 212 are in a closed position.
FIG. 2: a stray current loop isolating switch 7011 is in a closed position, and a direct current return isolating switch 6012, a direct current contact net feeder line networking switch 2121, a direct current contact rail feeder line isolating switch 2131 and direct current feeder line circuit breakers 212 and 213 are in a closed position.
FIG. 3: a stray current loop disconnecting switch 7011 is closed, and a direct current return disconnecting switch 6012, a direct current contact net feeder line networking switch 2121, a direct current contact rail feeder line disconnecting switch 2122 and a direct current feeder line breaker 212 are closed.
2) Contact network power supply and contact rail backflow
Fig. 1 and 4: stray current loop isolator 7011 closes, and dc return isolator 6012, contact rail return isolator 5001, dc contact net feeder net-surfing switch 2121, dc feeder breaker 212 close.
FIG. 2 is a schematic diagram: a stray current loop isolating switch 7011 is closed, and a direct current return isolating switch 6013, a direct current contact net feeder line networking switch 2121 and a direct current feeder line breaker 212 are closed.
The stray current protection measure is determined whether to be set according to engineering conditions.
3. DC +/-1500V, DC +/-750V, DC +/-375V and other DC +/-direct current system implementation modes:
(1) Anode contact net power supply and cathode contact rail reflux
And determining the setting mode of the steel rail potential limiting/grounding device according to the line condition.
Fig. 1 and 4: stray current loop isolator 7011 closes, and dc return isolator 6012, contact rail return isolator 5001, dc contact net feeder net-surfing switch 2121, dc feeder breaker 212 close.
FIG. 2: a stray current loop disconnecting switch 7011 is in a closed position, a contact rail return disconnecting switch 6013, a direct current contact network feeder line online switch 2121 and a direct current feeder line breaker 212 are in a closed position.
Stray current protection measures are determined whether to be set according to engineering conditions.
(2) Positive contact rail power supply and negative contact rail reflux
And determining the setting mode of the rail potential limiting/grounding device according to the line condition. FIG. 1: the dc return isolator 6012, the contact rail return isolator 5001, the dc contact rail feeder isolator 2122, and the dc feeder breaker 212 are closed.
FIG. 2 is a schematic diagram: a contact rail reflux isolating switch 6013, a direct current contact rail feeder line isolating switch 2131 and a direct current feeder line breaker 213 are closed.
(3) Contact net, positive contact rail for power supply and negative contact rail for reflux
And determining the setting mode of the steel rail potential limiting/grounding device according to the line condition.
FIG. 1: stray current loop isolator 7011 is in the on position (whether stray current loops are put into the loop is determined according to the line condition), and dc return isolator 6012, contact rail return isolator 5001, dc contact rail feeder isolator 2122, dc contact network feeder isolator 2121 and dc feeder breaker 212 are in the on position.
FIG. 2: a stray current loop isolating switch 7011 is closed (whether a stray current loop is put into the system is determined according to the line condition), and a contact rail backflow isolating switch 6013, a direct current contact rail feeder line isolating switch 2131, a direct current contact network feeder line internet access switch 2121, and direct current feeder line circuit breakers 213 and 212 are closed.
4. Connection to other lines
(1) Run-through mode of operation
When the power supply system of the section of contact network line is the same as that of other contact network lines and can run through, the disconnecting switches 3001 and 3002 (and/or 3003 and 3004) of the contact network power section/electric phase-splitting switches are all in the on position, and the circuit breakers 301 (and/or 302) are all in the on position; isolation switches of the insulated junction switches 4001 and 4002 (and/or 4003 and 4004) in the running rails are all in closed positions.
(2) Operating in a segmented manner
When the line of the section is the same as the power supply system of other lines and can run in a segmented mode, the isolating switch 3002 (and/or 3003) of the contact network power segmented/electric split-phase switch is in an on-position state, and the switches 3001 and 301 (and/or 3004 and 302) are in off-positions; isolation switches of insulated junction switches 4001 and 4002 (and/or 4003 and 4004) in the traveling rails are both in an on position or one of two switches on one side is in an on position and one is in an off position, and the position of the insulated junction switch is determined according to working conditions.
(3) Operating in split-phase mode
When the power supply is out of phase with the adjacent lines or the system is different, the isolating switches 3001, 3002 (and/or 3003, 3004) of the contact network power subsection/electrical split-phase switch operate in an electrical split-phase mode.
When one side of the split-phase two sides is a direct current power supply side and the other side is an alternating current power supply side, isolation switches 4001 and 4002 (and/or 4003 and 4004) of the insulated junction switches in the traveling rails are all split-phase.
The electric segmentation/electric phase separation and the position of the insulation joint are comprehensively determined according to the number, the distance and the like of the locomotive pantograph. Note that rail potentials in various cases between 4001 and 4002 and between 4003 and 4004 need to be accounted for, and if there is a possibility that the rail potential is too high, rail potential limiting measures need to be taken.
(4) If the line of the section is the same as the adjacent line in system, only when alternating current runs through, the current measuring device connected with the circuit breaker 301 (and/or 302) can adopt a current transformer; if the current section is the same as the adjacent line in system, only when direct current runs through, the current measuring device connected with the circuit breaker 301 (and/or 302) adopts a current divider; if the system of the current section is the same as that of the adjacent line, the current measuring device connected with the circuit breaker 301 (and/or 302) adopts a current divider suitable for both alternating current and direct current in direct current through running and alternating current through running.
(5) Depending on the engineering situation, the circuit breaker 301 (and/or 302) between the disconnectors 3001, 3003 (and/or 3003, 3004) and the current measuring device in the circuit thereof can be eliminated if the line segment and the adjacent line only have the segmented and split-phase operation mode.
(6) The various operation modes can be realized in groups according to the line condition, namely one group of 3001, 3002, 301, 4001 and 4002 and one group of 3003, 3004, 302, 4003 and 4004, the operation modes are mutually independent, and different operation modes can be adopted according to the two ends of the actual working condition.
(7) When the traction power supply system adopts wide-area protection under various operation modes, the self-healing and reconstruction after the fault of the power supply system can be realized, and the interconversion under various operation modes (through, segmented and split-phase) according to working conditions after the fault is included.
5. According to specific working conditions, the arrangement can be adjusted or combined
The power supply form is determined according to specific engineering conditions, and can adopt catenary power supply or contact rail power supply or a combination of a catenary and two return contact rails or a combination of a catenary and one return contact rail; the power supply system is determined according to specific working conditions, and one or more suitable power supply systems can be selected; when only the alternating current power supply system is adopted, the steel rail can be installed without insulation, and stray current protection facilities can be omitted; the traction transformation power supply part can be realized in a traction substation and can also be introduced by other power lines outside the substation; the power supply can be connected with one path of power supply and can also be connected with multiple paths of power supplies; the number of the feeder lines is set according to engineering conditions; the contact net and the contact rail are respectively powered by an independent circuit or a shared power supply circuit according to the engineering condition; the lightning arrester is arranged according to engineering requirements; the circuit breaker 301 (and/or 302), each measuring component is arranged according to engineering requirements; the equipment form is set according to the engineering condition; whether wide area protection is adopted is set according to engineering conditions; whether an intelligent traction power supply system is adopted is set according to engineering conditions; other specific settings can be adjusted or combined according to the field engineering situation, but when a certain operation mode is adopted, the condition of the operation mode is required to be verified. The electric phase separation of the contact network can adopt a device type or an anchor section joint form with a neutral section and air gap insulation according to the running speed and the running condition of the vehicle, and the number of the electric phase separation isolating switches is set according to the electric phase separation form. According to the working condition, if necessary, fig. 3 and fig. 4 can be combined, a return contact rail can be connected with the power supply circuit through the switch assembly, and can also be connected with the return circuit through the switch assembly, but at this time, special attention should be paid to a particularly reliable locking measure and a particularly reliable disconnection measure between the two circuits, and the contact rail cannot be communicated with the power supply circuit to the direct current positive bus and also communicated with the return circuit to the direct current negative bus so as to avoid short circuit.
Furthermore, one end of the direct current traction voltage transformation power supply part is connected to a contact net through a circuit breaker 1, a shunt 7, a disconnecting switch 2 and a connecting assembly, and is connected to a contact rail through the disconnecting switch 2 (the direct current traction voltage transformation power supply part can also be directly connected to the contact rail through the circuit breaker, the shunt, the disconnecting switch and the connecting assembly, the direct current traction voltage transformation power supply part is divided into an independent loop to supply power to the contact rail, the contact rail can be disconnected only when the contact net supplies power), one end of the direct current traction voltage transformation power supply part is connected to the return box through the disconnecting switch, and the other end of the direct current traction voltage transformation power supply part is connected to the drainage cabinet 4 through the disconnecting switch.
In the embodiment, the direct current traction voltage transformation power supply part transforms one or more connected power supply sources into a power supply system (DC 3000V, DC1500V, DC V, DC V, DC +/-1500V, D +/-750V, DC +/-375V or other direct current systems) required by a contact network through voltage transformation rectification, distribution and the like, feeds out the power supply system through a power supply loop, is connected to the contact network and/or the contact rail through a switching assembly and a measuring assembly to supply power to a locomotive, returns through a return loop, and collects stray current through a stray current collection network loop. Whether an independent power supply loop is adopted to supply power to the contact rail is determined according to engineering requirements; the number of power supply loops for the overhead line system and the contact rail is determined according to engineering requirements. If the power supply system of the contact connection is the same as the power supply system of the contact network or the contact rail and only one power supply is available, the power supply can be directly connected to the contact network or the contact rail through the switch assembly, the protection assembly and the measurement assembly.
Furthermore, one end of the alternating-current traction voltage transformation power supply part is connected to a contact net through the circuit breaker 1, the current transformer 6, the isolating switch 2 and the connecting assembly, and the other end of the alternating-current traction voltage transformation power supply part is connected to the return tank through the isolating net.
In the embodiment, the alternating-current traction voltage transformation power supply part transforms one or more connected power supply sources into power supply systems (AC 25kV, AC2 × 25kV, AC20kV, AC 11-15 kV or other alternating-current systems) required by the overhead contact system through transformation, inversion, distribution and the like, feeds the power supply systems out through a power supply loop, is connected to the overhead contact system through a switch assembly and a measurement assembly to supply power to a locomotive, and performs backflow through a backflow loop, wherein the number of the power supply loops is determined according to engineering requirements. If the power supply system is the same as the power supply system of the contact network, the power supply can be directly connected to the contact network through the switch assembly, the protection assembly and the measurement assembly.
Further, the protective assembly comprises a rail potential limiting/grounding device 3 and a lightning arrester 5.
In this embodiment, the rail potential limiting/grounding device is connected to the protected line at one end and grounded at the other end to prevent personal injury due to too high rail potential. The lightning arrester is reasonably arranged at the wire inlet side of a power supply, the wire inlet side of a direct current traction voltage transformation power supply part, the wire inlet side of an alternating current bus and a wire outlet feeder, the positions of the direct current bus and the wire outlet feeder, a contact net and the like according to engineering conditions, and equipment is protected from being damaged by instantaneous overvoltage under the conditions of lightning, operation overvoltage and the like.
Further, the contact network assembly comprises a multi-system contact network and an electric phase splitting device 8 between the contact networks, one end of the contact network is connected to the direct current traction power supply part through the switch assembly and the measuring assembly, and the other end of the contact network is connected to the alternating current traction power supply part through the switch assembly and the measuring assembly; the electric phase splitting device between the contact networks of the lines of different systems is connected with the multi-system line through one end of the switch assembly and the measuring assembly, and the other end is connected with the alternating current system or direct current system line.
In the embodiment, the corresponding switch assembly is closed or opened according to engineering requirements, and the required power supply system can be obtained from the alternating current power supply bus to supply power to the locomotive. At the joint of the line and other lines, the operation in a through mode or a sectional mode when the same-system power supply of the adjacent line can be communicated can be realized through the change of the opening and closing state of the switch assembly at the contact network power section/electric phase separation position, and the operation in an electric phase separation mode when the same-system power supply of the adjacent line is out of phase or the system is different (whether the condition of the operation mode conversion is met or not needs to be judged during the operation mode conversion). And when wide area protection is adopted, self-healing and reconstruction after system failure can be realized.
Furthermore, the walking reflux assembly comprises walking rails (which are reflux rails during reflux), a reflux box, an insulation junction 9 between the walking reflux rails, a stray current collecting net and a drainage cabinet 4. The walking rails (return rails) are connected to the return box through the switch assembly (if only one return circuit is connected to the return box or the operation mode of the return circuit at the section is not changed, the switch assembly is not arranged); insulation junctions among the running reflux rails of different-system lines are connected with the running rails of the multi-system lines through one end of a switch assembly, and one end of the switch assembly is connected with the running rails of an alternating current system or a direct current system; one end of the drainage cabinet 4 is connected with the direct current negative bus, one end of the drainage cabinet is connected with the substation ground busbar, and the other end of the drainage cabinet is connected with the stray current collecting net through the drainage terminal.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The multi-system traction power supply system is characterized by comprising a transformation component, a switch component, a protection component, a measurement component, a contact network component, a contact rail component, a walking backflow component and a connecting component, wherein the transformation component comprises a direct-current traction transformation power supply part and an alternating-current traction transformation power supply part, the switch component comprises a circuit breaker (1) and an isolating switch (2), the protection component comprises a steel rail potential limiting/grounding device (3) and a lightning arrester (5), the measurement component comprises a current transformer (6) and a shunt (7), the contact network component comprises a multi-system contact network and a contact network electric phase splitting device (8), the contact rail component comprises a multi-system contact rail, the walking backflow component comprises a walking rail, a backflow box, an insulation junction (9) between the walking backflow rails, a stray current collection network and a drainage cabinet (4), the contact network component and the contact rail component comprise connecting cables, connecting leads and copper busbars, and the contact network component and the contact rail component are respectively connected to the corresponding transformation component through the switch component, the protection component, the measurement component, the walking backflow component and the walking backflow component.
2. The multi-standard traction power supply system according to claim 1, wherein: one end of the direct-current traction voltage transformation power supply part is sequentially connected with a contact net through the circuit breaker (1), the shunt (7), the isolating switch (2) and the connecting assembly and is connected to a positive contact rail through the isolating switch (2), one end of the direct-current traction voltage transformation power supply part is connected to the return tank through the isolating switch (2) and the shunt (7), and the other end of the direct-current traction voltage transformation power supply part is connected to the drainage cabinet (4) through the isolating switch (2).
3. The multi-standard traction power supply system according to claim 1, wherein: one end of the alternating current traction transformation power supply part is connected with a contact net through the circuit breaker (1), the current transformer (6), the isolating switch (2) and the connecting assembly, and the other end of the alternating current traction transformation power supply part is connected with a return box through the isolating switch (2), the current transformer (6) and the connecting assembly.
4. The multi-standard traction power supply system according to claim 1, wherein: one end of the steel rail potential limiting/grounding device (3) is connected with the traveling rail, and the other end of the steel rail potential limiting/grounding device is grounded.
5. The multi-standard traction power supply system according to claim 1, wherein: one end of the multi-standard contact network is connected to the direct-current traction voltage transformation power supply part through the switch assembly and the measuring assembly, and the other end of the multi-standard contact network is connected to the alternating-current traction voltage transformation power supply part through the switch assembly and the measuring assembly; and an electrical phase splitting device between the contact networks is connected to a multi-standard line through the switch assembly and one end of the measuring assembly, and the other end of the electrical phase splitting device is connected to an alternating current system or direct current system line.
6. The multi-standard traction power supply system according to claim 1, wherein: and the positive contact rail of the contact rail assembly is connected to the positive bus of the direct-current traction voltage transformation power supply part through the switch assembly and the measuring assembly, and the negative contact rail of the contact rail assembly is indirectly or directly connected to the return box through the switch assembly and then connected to the negative bus of the direct-current traction voltage transformation power supply part.
7. The multi-standard traction power supply system according to claim 1, wherein: the traveling rail is connected to the reflux box through the switch assembly, one end of the insulation knot (9) is connected with the multi-system line traveling rail through the switch assembly, the other end of the insulation knot is connected with the alternating current system or direct current system traveling rail, the first end of the drainage cabinet (4) is connected with a direct current negative bus through the switch assembly, the second end of the drainage cabinet (4) is connected with a substation ground busbar, and the third end of the drainage cabinet (4) is connected with the stray current collection net through a drainage terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221713887.5U CN217994213U (en) | 2022-06-28 | 2022-06-28 | Multi-system traction power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221713887.5U CN217994213U (en) | 2022-06-28 | 2022-06-28 | Multi-system traction power supply system |
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| CN217994213U true CN217994213U (en) | 2022-12-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116767032A (en) * | 2023-08-17 | 2023-09-19 | 中铁电气化勘测设计研究院有限公司 | Dual-traction-network power supply system based on multipurpose power supply rail |
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2022
- 2022-06-28 CN CN202221713887.5U patent/CN217994213U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116767032A (en) * | 2023-08-17 | 2023-09-19 | 中铁电气化勘测设计研究院有限公司 | Dual-traction-network power supply system based on multipurpose power supply rail |
| CN116767032B (en) * | 2023-08-17 | 2023-12-08 | 中铁电气化勘测设计研究院有限公司 | Dual-traction-network power supply system based on multipurpose power supply rail |
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