CN217227346U - Rail transit traction power supply device and rail transit traction power supply system - Google Patents

Abstract

The utility model provides a rail transit pulls power supply unit and rail transit pulls power supply system. Wherein, track traffic pulls power supply unit includes: the isolation grounding disconnecting link is arranged among the traction substation, the contact network and the grounding rail, and comprises a moving contact, a switching-on static contact and a grounding static contact, wherein the moving contact is electrically communicated with the contact network through a contact network circuit; the cross-zone switch is arranged on the cross-zone line and controls the connection and disconnection of the cross-zone line. The utility model provides a pull power supply system structure among the prior art problem complicated with high costs.

Description

Rail transit traction power supply device and rail transit traction power supply system

Technical Field

The utility model relates to a track traffic technical field particularly, relates to a track traffic pulls power supply unit and track traffic pulls power supply system.

Background

According to the traditional traction power supply technology, high-voltage alternating current is rectified and reduced to DC1500V or DC750V by a traction substation, then the high-voltage alternating current is connected with a contact network through a feeder line, and the direct current is transmitted to a subway vehicle. At present, the power supply mode comprises a single-side power supply mode and a double-side power supply mode. The power supply arm of the locomotive with the unilateral power supply receives power from only one traction substation, and the power supply arm of the locomotive with the bilateral power supply receives power from only two traction substations. In order to ensure the stability of subway operation and avoid the condition that the subway is stopped due to the fact that a traction substation is in fault, a bilateral power supply mode is adopted on a main line. As shown in fig. 1, a conventional dual-side power supply method adopts two isolation switches 10 ' + two grounding switches 20 ' + one cross-area isolation switch 30 ', which has the following problems:

1. the number of the knife switches is too large, and five knife switches are used in total, so that the cost of the whole power supply equipment is high, the system is complex, and the failure probability is high;

2. the conventional cross-area isolating switch adopts a common isolating switch, can not realize on-load on-off, and can only be switched on and off after power failure. Therefore, the cross-region isolating switch is switched on and off in the power failure, the operation efficiency of the subway is influenced, the traction fault point cannot be overhauled in time, and the overhauling efficiency is greatly reduced.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide a power supply unit is pull to rail transit and power supply system is pull to rail transit to solve the complicated problem with high costs of power supply system structure that pulls among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a rail transit traction power supply device, including: the isolation grounding disconnecting link is arranged among the traction substation, the contact network and the grounding rail, and comprises a moving contact, a switching-on static contact and a grounding static contact, wherein the moving contact is electrically communicated with the contact network through a contact network circuit; the cross-zone switch is arranged on the cross-zone line and controls the connection and disconnection of the cross-zone line.

Furthermore, the isolation grounding knife switch is multiple, and at least one isolation grounding knife switch is arranged on each of the two feed lines.

Further, the handoff switch includes a handoff load switch, and the handoff load switch is located on the handoff line.

Further, the hand-off switch also comprises a hand-off isolating switch which is arranged on the hand-off line and is connected with the hand-off load switch in series.

According to the utility model discloses an on the other hand provides a rail transit pulls power supply system, pull power supply unit including a plurality of foretell rail transit, rail transit pulls power supply unit and sets up respectively between the traction substation of difference, contact net interval and ground connection track interval.

Further, the rail transit traction power supply system further comprises a cabinet body, and the rail transit traction power supply device is arranged in the cabinet body.

Furthermore, the cabinet body is a plurality of, and when track traffic traction power supply unit had a plurality of isolation earthing knife-switches, same track traffic traction power supply unit's different isolation earthing knife-switches set up in different cabinet bodies.

Furthermore, the cross-area switch and the isolation grounding knife switch are arranged in the same cabinet body.

Further, the over-zone switch and the isolation grounding knife switch are arranged in different cabinet bodies.

Furthermore, the rail transit traction power supply system also comprises a public busbar which is electrically connected with a moving contact of the isolation grounding disconnecting link, a cross-area switch and a contact network.

Use the technical scheme of the utility model, through being provided with isolation ground connection switch, it adopts the mode that sets up of three stations to keep apart ground connection switch, the moving contact has the switch-on position promptly, isolated position, the three position of ground connection position, thereby make a moving contact can realize the switch-on position, isolated position, the switching of ground connection position, also one keeps apart ground connection switch and can realize the switch-on, keep apart, the switching of ground connection, thereby traditional isolator + earthing switch's mode has been simplified, the use quantity of switch has been reduced, set up one respectively on two general feeders and keep apart ground connection switch, keep apart the effect that four traditional switches can be realized to ground connection switch two at least, make whole device simpler, also can reduce cost simultaneously, be convenient for carry out the troubleshooting.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structure diagram of a traction power supply system in the prior art;

fig. 2 shows a schematic structural diagram of the rail transit traction power supply device of the present invention;

fig. 3 shows a schematic structural diagram of the isolation earthing knife-switch in fig. 2 in a switch-on state;

FIG. 4 is a schematic diagram of the isolated grounding knife-switch of FIG. 2 in an isolated state;

FIG. 5 is a schematic diagram of the isolated grounding knife-switch of FIG. 2 in a grounding state;

fig. 6 shows a schematic structural diagram of the rail transit traction power supply system of the present invention;

fig. 7 shows a structural schematic diagram of a cabinet mode one of the rail transit traction power supply system in fig. 6;

fig. 8 shows a structural schematic diagram of a cabinet mode two of the rail transit traction power supply system in fig. 6;

fig. 9 shows a structural schematic diagram of a cabinet mode three of the rail transit traction power supply system in fig. 6;

fig. 10 shows a schematic structural diagram of a common busbar arrangement of the rail transit traction power supply system in fig. 6.

Wherein the figures include the following reference numerals:

10', an isolation knife switch; 20', a grounding knife switch; 30', a cross-region isolating switch; 10. isolating the grounding disconnecting link; 11. a moving contact; 12. switching on a static contact; 13. a grounding static contact; 20. a traction substation; 21. a feeder line; 30. a contact line; 31. a contact network line; 40. a grounding rail; 41. a ground line; 50. a handover line; 61. a cross-area load switch; 62. a cross-region isolating switch; 70. a cabinet body; 80. and a common bus bar.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

In order to solve the problem that the structure of the traction power supply equipment in the prior art is complex and high in cost, the utility model provides a rail transit traction power supply device and rail transit traction power supply system.

As shown in fig. 2 to 5, the rail transit traction power supply device includes an isolation grounding switch 10 and a cross-over switch, the isolation grounding switch 10 is disposed between a traction substation 20, a contact network 30 and a grounding rail 40, the isolation grounding switch 10 includes a movable contact 11, a switch-on fixed contact 12 and a grounding fixed contact 13, the movable contact 11 is electrically connected to the contact network 30 through a contact network line 31, the switch-on fixed contact 12 is electrically connected to the traction substation 20 through a feeder line 21, the grounding fixed contact 13 is electrically connected to the grounding rail 40 through a grounding line 41, the movable contact 11 is movably disposed and has a switch-on position contacting the switch-on fixed contact 12, an isolation position not contacting both the switch-on fixed contact 12 and the grounding fixed contact 13, and a grounding position contacting the grounding fixed contact 13; a handoff 50 is arranged between the two contact net lines 31 of the electric subsection, the handoff 50 is electrically communicated with the two contact net lines 31, and a handoff switch is arranged on the handoff 50 and controls the connection and disconnection of the handoff 50.

This embodiment is through being provided with isolation ground connection switch 10, isolation ground connection switch 10 adopts the mode of setting of three stations, moving contact 11 has the switch-on position promptly, the isolated position, the three position of ground connection position, thereby make a moving contact 11 can realize the switch-on position, the isolated position, the switching of ground connection position, also one isolation ground connection switch 10 can realize the switch-on, keep apart, the switching of ground connection, thereby traditional isolator + earthing switch's mode has been simplified, the use quantity of switch has been reduced, set up one isolation ground connection switch 10 on two generally feeders 21 respectively, the effect of four traditional switches can be realized to two at least isolation ground connection switches 10, make whole device simpler, also can reduce cost simultaneously, be convenient for carry out the troubleshooting.

Because generally speaking, the traction substation 20 supplies power to the contact network 30 through two power supply lines, therefore, two feeder lines 21, two contact network lines 31 and two grounding lines 41 are provided, each feeder line 21, each contact network line 31 and each grounding line 41 form a set of power supply line, correspondingly, two isolated grounding disconnecting switches 10 are provided, and the feeder line 21, the contact network line 31 and the grounding line 41 of each set are respectively matched with one isolated grounding disconnecting switch 10, so that the number of disconnecting switches is reduced on the basis of realizing connection, isolation and grounding switching. Of course, the number of the isolated grounding disconnecting switches 10 may also be changed as required, and the feeder line 21, the catenary line 31, and the grounding line 41 of each group may be matched with a plurality of isolated grounding disconnecting switches 10.

It should be noted that the contact systems 30 are not continuous in general, and an isolation electric device is arranged on the contact systems for electric sectioning, so that different contact system sections are formed, the different contact system sections are not conducted with each other under normal conditions, and the two contact system lines 31 are electrically connected with two adjacent and different contact system sections, so that the two contact system lines 31 of the same rail transit traction power supply device are also electrically sectioned, and the handover line 50 is arranged between the two contact system lines 31 of the electric sectioning, so that the on-off of the handover line 50 is controlled through the on-off of the handover switch, and the on-off relation between the different contact system sections is also controlled, so that the handover power supply is realized.

In this embodiment, the handoff switch includes a handoff load switch 61, and the handoff load switch 61 is located on the handoff line 50. The cross-area switch of the embodiment is different from the traditional cross-area switch, and adopts the cross-area load switch 61 capable of carrying load breaking, so that the function of switching off the cross-area power supply without power outage of the whole rail transit traction power supply system is realized, and the efficiency and the reliability of subway operation are improved. The cross-region load switch 61 may be specifically configured to select a switch, a contactor, a breaker, or other components having a switching function as needed, and only needs to have a load breaking function.

Since the contacts of the cross-over load switch 61 are generally located inside the arc extinguishing device, and the breaking state of the contacts inside cannot be visually observed from the outside, for the convenience of observation and safety assurance, the cross-over switch of this embodiment further includes a cross-over isolating switch 62, the cross-over isolating switch 62 is arranged on the cross-over line 50 and is connected in series with the cross-over load switch 61, and the cross-over isolating switch 62 may be a knife switch without load breaking capability, that is, a conventional isolating knife switch. The purpose of the setting of the cross-region isolation knife switch is to enable a cross-region line 50 to have an obvious disconnection point, so that a person can conveniently determine the on-off state of the cross-region line, misoperation is avoided, and the safety of the person is ensured.

The isolation grounding switch 10 of this embodiment further includes a connection static contact, the connection static contact is in running fit with the movable contact 11, and the connection static contact and the movable contact are always electrically connected, when the movable contact 11 is connected with the contact network line 31, the connection static contact is passed through, that is, the contact network line 31 is connected to the connection static contact, so as to be electrically connected to the movable contact 11. Of course, the contact line 31 may be directly connected to the movable contact 11.

The overall arrangement mode of the rail transit traction power supply device of the embodiment is as follows: the traction substation 20 draws out two feeder lines 21, the two feeder lines 21 are respectively and electrically connected with a switch-on static contact 12 of an isolation grounding disconnecting link 10, meanwhile, a movable contact 11 of each isolation grounding disconnecting link 10 is respectively and electrically connected with a contact network 30 through a contact network line 31, and a grounding static contact 13 of each isolation grounding disconnecting link 10 is respectively and electrically connected with a grounding rail 40 through a grounding line 41, so that when the movable contact 11 rotates to a switching position, switching among switch-on, isolation and grounding can be realized. Meanwhile, a handover line 50 is connected between the two catenary lines 31, and a handover load switch 61 and a handover isolating switch 62 are provided in series on the handover line 50 to perform handover power supply.

As shown in fig. 6, this embodiment also provides a rail transit traction power supply system, which includes a plurality of the above rail transit traction power supply apparatuses, and the rail transit traction power supply apparatuses are respectively disposed between different traction substations 20, contact networks 30, and grounding rail 40. For example, three traction substations 20 are arranged in fig. 6, three rail transit traction power supply devices are respectively arranged among the three traction substations 20, the contact network 30 and the grounding rail 40, and the three traction substations 20 respectively supply power to the corresponding contact network 30 section through the corresponding rail transit traction power supply devices so as to ensure the power demand of the rail vehicle. The specific use process of the rail transit traction power supply system is as follows:

when the traction power supply is normally operated, the isolation earthing knife-switch 10 of each traction substation 20 is in an on state, and the handover load switch 61 and the handover isolation switch 62 are in an off state, and at this time, the normal power supply is performed.

When a fault occurs in a traction substation 20 and needs to be checked and repaired, the isolation grounding knife switch 10 corresponding to the traction substation 20 needs to be disconnected, and the connection state is converted into the isolation state. And under the conditions of electricity testing and no electricity and meeting the maintenance condition, the state of the isolation grounding disconnecting link 10 is converted from the isolation state to the grounding state. Meanwhile, it is to be ensured that the subway vehicle does not stop due to power failure when the subway vehicle runs to the power supply section corresponding to the failed traction substation 20, and therefore, power needs to be supplied from a cross-region, that is, power of the adjacent traction substations 20 is transmitted to the power supply section of the failed traction substation 20, so that the train runs normally. At this time, the corresponding cross-region isolating switch 62 of the traction substation 20 with the fault needs to be switched on first, and then the corresponding cross-region load switch 61 needs to be switched on, so that the function of double-side power supply uninterrupted switching is realized.

After the trouble shooting and the overhaul of the failed traction substation 20 are completed, the power supply of the traction substation 20 needs to be recovered, the isolation grounding switch 10 needs to be switched from the grounding state to the isolation state, and the isolation grounding switch 10 needs to be switched from the isolation state to the connection state after the condition that the power transmission condition is met is confirmed. Then, the corresponding load-break switch 61 of the faulty traction substation is opened, and then the corresponding isolation switch 62 is opened. At this point, the rail transit system resumes normal operation.

In this embodiment, the rail transit traction power supply system further includes a cabinet 70, and the rail transit traction power supply device is disposed in the cabinet 70. The cabinet body 70 may be provided with a plurality of isolation grounding switch blocks 10 according to needs, and when the rail transit traction power supply device has a plurality of isolation grounding switch blocks 10, different isolation grounding switch blocks 10 of the same rail transit traction power supply device are arranged in different cabinet bodies 70. And the over-distance switch and the isolated grounding knife switch 10 can be arranged in the same cabinet 70 or in different cabinets 70 according to requirements.

Specifically, the specific arrangement of the isolation earthing switch 10 and the over-distance switch in the cabinet 70 varies according to actual requirements and different installation environments. For example, in the first mode, two isolated grounding knife switches 10 and a hand-off switch are respectively arranged in different cabinets 70, so as to form a combined mode of the isolated grounding knife switch 10+ the hand-off switch + the isolated grounding knife switch 10, as shown in fig. 7. In the second mode, under the condition that the installation environment is narrow and requires a small space occupied by the cabinet 70, one isolation grounded disconnecting link 10 and the hand-off switch may be disposed in the same cabinet 70, and another isolation grounded disconnecting link 10 is disposed in another cabinet 70, so as to form a combination mode of the isolation grounded disconnecting link 10 and the hand-off switch + the isolation grounded disconnecting link 10, as shown in fig. 8. In a third mode, in a vehicle section or other places with single-side power supply, only the isolated earthing knife-switch 10 is needed, and an intermediate cross-over switch and another isolated earthing knife-switch 10 are not needed, so that only one cabinet body 70 is needed to install the isolated earthing knife-switch 10, as shown in fig. 9. The modular design flexibly deals with various use scenes, so that the use scenes are more flexible, and different use requirements are met. Of course, the specific arrangement is not limited to the above-mentioned manner exemplified in the embodiment, and other arrangements may be adopted as needed.

In this embodiment, the rail transit traction power supply system further includes a common busbar 80, and the common busbar 80 is electrically connected to the movable contact 11 of the isolation grounding disconnecting link 10, the over-zone switch, and the contact network 30. Specifically, as shown in fig. 10, the movable contact 11 of the isolation earthing switch 10 or the connection stationary contact connected to the movable contact 11 is lapped with the public busbar 80 by using a copper bar, and one end of the over-zone switch is also lapped with the public busbar 80 by using a copper bar, and the public busbar 80 is electrically connected to the contact system 30. The isolation earthing knife-switch 10 on the other feeder line 21 also adopts the arrangement mode of the common busbar 80. This mode of setting mainly used in above-mentioned cabinet combination compound mode, adopt this mode can reduce the use amount of the interior copper bar of the cabinet body 70, reduce the interior copper bar of cabinet and generate heat the point, optimized the internal space of the cabinet body 70 simultaneously, reduced the volume of the cabinet body 70.

It should be noted that, a plurality in the above embodiments means at least two.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

1. the problem that traction power supply equipment in the prior art is complex in structure and high in cost is solved;

2. the mode of the traditional isolating switch and the grounding switch is simplified, the using number of the disconnecting switches is reduced, the whole device is simpler, the cost can be reduced, and the fault maintenance is convenient;

3. the cross-area load switch capable of carrying out load breaking is adopted, so that the function of switching off the whole traction power supply system without power outage during cross-area power supply is realized, and the efficiency and the reliability of subway operation are improved;

4. the cross-region isolation switch enables the cross-region circuit to have an obvious disconnection point, so that the personnel can conveniently determine the on-off state of the cross-region circuit, misoperation is avoided, and the safety of the personnel is ensured;

5. the rail transit traction power supply system is designed in a modularized manner, and flexibly deals with various use scenes, so that the use scenes are more flexible, and different use requirements are met;

6. the arrangement mode of the public bus bar can reduce the use amount of copper bars in the cabinet body, reduce heating points of the copper bars in the cabinet, optimize the space in the cabinet body and reduce the volume of the cabinet body.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those illustrated or described herein.

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.

Claims (8)

1. A rail transit traction power supply device is characterized by comprising:

the isolation grounding disconnecting link (10) is arranged among the traction substation (20), the contact net (30) and the grounding rail (40), the isolation grounding disconnecting link (10) comprises a moving contact (11), a switch-on static contact (12) and a grounding static contact (13), the moving contact (11) is electrically communicated with the contact net (30) through a contact net circuit (31), the connecting static contact (12) is electrically communicated with the traction substation (20) through a feeder line (21), the grounding static contact (13) is electrically communicated with the grounding rail (40) through a grounding circuit (41), the moving contact (11) is movably arranged, the switch-on position is in contact with the switch-on static contact (12), the isolation position is not in contact with the switch-on static contact (12) and the grounding static contact (13), and the grounding position is in contact with the grounding static contact (13);

a hand-off switch, wherein a hand-off line (50) is arranged between two contact net lines (31) of the electrical subsection, the hand-off line (50) is electrically communicated with the two contact net lines (31), the hand-off switch is arranged on the hand-off line (50), and the hand-off switch controls the on-off of the hand-off line (50); the handoff switch comprises a handoff load switch (61), the handoff load switch (61) is positioned on the handoff line (50), the handoff switch also comprises a handoff isolation switch (62), the handoff isolation switch (62) is arranged on the handoff line (50) and is connected with the handoff load switch (61) in series.

2. The rail transit traction power supply device according to claim 1, wherein the isolation earthing switch (10) is multiple, and at least one isolation earthing switch (10) is arranged on each of the two feeder lines (21).

3. A rail transit traction power supply system is characterized by comprising a plurality of rail transit traction power supply devices according to claim 1 or 2, wherein the rail transit traction power supply devices are respectively arranged among different traction substations (20), contact net (30) intervals and grounding rail (40) intervals.

4. The rail transit traction power supply system according to claim 3, further comprising a cabinet (70), wherein the rail transit traction power supply is disposed within the cabinet (70).

5. The rail transit traction power supply system according to claim 4, wherein the cabinet (70) is multiple, and when the rail transit traction power supply device has multiple isolation grounding disconnecting switches (10), different isolation grounding disconnecting switches (10) of the same rail transit traction power supply device are arranged in different cabinets (70).

6. The rail transit tractive power supply system of claim 4, wherein the hand-off switch is disposed in the same cabinet (70) as the isolation grounding switch (10).

7. The rail transit tractive power supply system of claim 4, wherein the over-distance switch and the isolation grounding switch (10) are disposed in different cabinets (70).

8. The rail transit traction power supply system according to claim 7, further comprising a common busbar (80), wherein the common busbar (80) is electrically connected with the movable contact (11) of the isolation grounding disconnecting link (10), the over-zone switch and the contact network (30).

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