CN214625750U

CN214625750U - Traction network power supply and interconnection combined switch cabinet device

Info

Publication number: CN214625750U
Application number: CN202120027060.8U
Authority: CN
Inventors: 张开波; 周才发; 刘卫东; 向往; 曾之煜; 杨镇华; 陈桁
Original assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Current assignee: China Railway Eryuan Engineering Group Co Ltd CREEC
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-11-05
Anticipated expiration: 2031-01-06

Abstract

A traction network power supply and interconnection combined switch cabinet device is used for optimizing a power supply scheme from a traction substation to a traction network. The combined switch cabinet comprises an internet-surfing isolating switch, a cross-area contact switch and a combined switch cabinet body, wherein an uplink traction network corresponds to a first internet-surfing isolating switch and a fourth internet-surfing isolating switch which are independent, and a downlink traction network corresponds to a second internet-surfing isolating switch and a third internet-surfing isolating switch which are independent. One end of the first internet isolating switch and one end of the second internet isolating switch are respectively connected with the uplink traction network and the downlink traction network, and the other ends of the first internet isolating switch and the second internet isolating switch are connected in parallel and then connected with the cross-zone connection switch. One end of the third upper net isolating switch and one end of the fourth upper net isolating switch are respectively connected with the uplink traction net and the downlink traction net, and the other ends of the third upper net isolating switch and the fourth upper net isolating switch are connected with the cross-zone connection switch after being connected in parallel. The cross-area connection switch, the first networking isolating switch, the second networking isolating switch, the third networking isolating switch and the fourth networking isolating switch are integrated in the combined switch cabinet body.

Description

Traction network power supply and interconnection combined switch cabinet device

Technical Field

The utility model relates to an urban rail transit, in particular to draw net power supply contact combination switch cabinet device.

Background

At present, most of urban rail transit engineering traction power supply systems adopt a traction power supply system of DC1500V (or DC750V) traction network current granting and traveling rail (or special return rail) return, and bidirectional operation of an electric motor train unit on an uplink and a downlink is realized. And an insulation section is arranged near a traction network attached to the traction substation, power is respectively supplied to uplink and downlink lines on two sides through a direct current feeder of the traction substation and a corresponding on-line isolating switch, and a cross-zone connection switch is arranged to realize cross-zone power supply under the condition of traction substation faults.

Referring to fig. 1, when power is supplied from a traction substation to a traction network and power is supplied in a handover mode, generally, an uplink and a downlink adopt a mode of an internet isolating switch and a handover contact switch. In the figure, QS1, QS2, QS3 and QS4 are internet isolating switches, QS13 and QS24 are cross-region connecting switches, and dotted lines indicate isolating switch cabinets. The cross-over switches QS13, QS24 may be disconnectors or circuit breaker switches that operate with load as required.

In practical applications, many projects place these switches in the form of modular switchgears in the substation.

When the combined switch cabinet of the scheme requires independent power supply on the uplink and the downlink, the independent internet access and the independent power supply on the downlink can be realized only by arranging 4 feedback line breakers and 2 sets of internet access and cross-area switch cabinet devices on the traction transformer.

Along with the development of rail transit, more light rail transit lines appear, the requirements on saving labor cost and investment and saving occupied area of equipment are higher, and because the load is lighter, only 2 feedback line breakers are needed to be arranged, 1 set of switch cabinet devices for surfing the internet and passing through a region are needed to be arranged, the traction networks of the uplink and the downlink are powered in parallel under normal conditions, and under some special conditions, independent power supply of the traction networks of the uplink and the downlink can be realized through switching operation; meanwhile, the traction network can realize cross-zone power supply.

Therefore, aiming at the power supply requirements of the light rail transit line (similar to tramcars, air rails, cloud rails, light magnetic suspension lines, light mountain land tooth rail engineering and the like), a novel traction network power supply and contact combined switch cabinet scheme is provided, and the engineering investment and the occupied area of substation equipment are saved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a draw net power supply contact combination switch cabinet device is provided to the realization draws the transformer substation to the optimization of drawing the net power supply scheme.

The utility model provides an above-mentioned technical problem adopted technical scheme as follows:

the utility model discloses a draw net power supply contact combination switch cabinet device, characterized by: the combined switch cabinet comprises an internet access isolating switch, a cross-area contact switch and a combined switch cabinet body, wherein an uplink traction network corresponds to a first internet access isolating switch and a fourth internet access isolating switch which are independent, and a downlink traction network corresponds to a second internet access isolating switch and a third internet access isolating switch which are independent; one ends of the first internet isolating switch and the second internet isolating switch are respectively connected with the uplink traction network and the downlink traction network, and the other ends of the first internet isolating switch and the second internet isolating switch are connected with the cross-zone connection switch after being connected in parallel; one end of the third internet isolating switch and one end of the fourth internet isolating switch are respectively connected with the uplink traction network and the downlink traction network, and the other ends of the third internet isolating switch and the fourth internet isolating switch are connected with the cross-zone connection switch after being connected in parallel; the cross-area contact switch, the first networking isolating switch, the second networking isolating switch, the third networking isolating switch and the fourth networking isolating switch are integrated in the combined switch cabinet body.

The beneficial effects of the utility model are embodied in the following aspect:

firstly, only one set of combined switch cabinet is adopted, and simultaneously, the communication cross-area power supply and the internet access scheme of an uplink and downlink traction network are realized, 2 feedback line circuit breakers of a traction substation can be reduced, and the engineering investment and the floor area of substation equipment are saved;

the uplink and downlink traction networks adopt parallel power supply under normal conditions, and under some special conditions, independent power supply of the uplink and downlink traction networks can be realized through switching operation, the traction network in a fault section is withdrawn, continuous power supply of the uplink or downlink traction network without a fault is still maintained, and complete shutdown of the line is avoided; meanwhile, the traction network can realize communication cross-area power supply according to needs. The operation and maintenance management of the whole project are facilitated;

and thirdly, the device integrates 4 internet access isolating switches and 1 cross-area contact switch (circuit breaker or isolating switch) in a combined cabinet body, so that the integrity is good, the occupied area is reduced, and the operation management and the maintenance of the device are facilitated.

The utility model provides a satisfy the power supply demand of pulling the various operation mode conversions of net, save engineering investment and substation equipment area, the net power supply contact combination switch cabinet device that pulls of being convenient for construction installation, operation management and maintenance, but the wide application is in the power supply system design that pulls of present various light-duty urban rail transit engineering (similar tram, empty rail, cloud rail, light-duty magnetic suspension circuit, light-duty mountain land cogged rail engineering etc.).

Drawings

The specification includes the following six figures:

fig. 1 is a schematic diagram of a power supply mode of a conventional internet access isolating switch plus a cross-region contact switch.

Fig. 2 is a schematic structural view of the utility model relates to a draw net power supply interconnection combination switch cabinet device.

The components and corresponding labels are shown in fig. 2: the system comprises a feeder circuit breaker 1, a feeder connecting cable 2, a first internet isolating switch 31, a second internet isolating switch 32, a third internet isolating switch 33, a fourth internet isolating switch 34, a cross-region contact switch 4, an internet connecting cable 5, an uplink traction network 6a, a downlink traction network 6b, a traction network insulation section 7, a combined switch cabinet body 8, a left-side adjacent traction substation 9 and a right-side adjacent traction substation 10.

Fig. 3 is a schematic structural view of an embodiment 1 of an interconnection switch for power supply interconnection of a traction network of the present invention.

Fig. 4 is a schematic structural view of the cross-area connection switch embodiment 2 in the traction network power supply connection combined switch cabinet device of the present invention.

Fig. 5 is a schematic structural view of the cross-area connection switch embodiment 3 in the traction network power supply connection combined switch cabinet device of the present invention.

Fig. 6 is a schematic structural view of an embodiment 4 of an interconnection switch for connecting the traction network power supply and the combined switch cabinet device.

Fig. 3 to 6 show the components and the corresponding markings in fig. 2: a hand-off switch 4, a circuit breaker 41, a disconnector 42.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Referring to fig. 2, the utility model discloses a draw net power supply contact combination switch cabinet device includes online isolator 3, the contact switch 4 and the combination switch cabinet body 8 of handing off. The uplink traction network 6a corresponds to the first and fourth independent on-

line isolation switches

31 and 34, and the downlink traction network 6b corresponds to the second and third independent on-line isolation switches 32 and 33. One end of the first internet isolating switch 31 and one end of the second internet isolating switch 32 are respectively connected with the uplink traction network 6a and the downlink traction network 6b, and the other ends are connected in parallel and then connected with the cross-zone connection switch 4. One end of the third internet isolating switch 33 and one end of the fourth internet isolating switch 34 are respectively connected with the uplink traction network 6a and the downlink traction network 6b, and the other ends are connected in parallel and then connected with the cross-zone connection switch 4. The cross-area contact switch 4, the first internet isolating switch 31, the second internet isolating switch 32, the third internet isolating switch 33 and the fourth internet isolating switch 34 are integrated in the combined switch cabinet body 8.

And in normal operation, a feeder circuit breaker 1 of the traction substation is connected with a cross-area contact switch 4 through a feeder connecting cable 2, and supplies power to a traction network through an on-line isolating switch and an on-line connecting cable 5, so that parallel power supply of an upper traction network and a lower traction network is realized.

When the upstream traction network 6a or the downstream traction network 6b has a fault, an on-line isolating switch for supplying power to the corresponding fault traction network needs to be opened, and the traction network in the fault section is quitted. The power supply of the upstream traction network 6a or the downstream traction network 6b which is not in fault is still maintained, and the complete shutdown of the line is avoided.

And when the fault of the uplink traction network 6a or the downlink traction network 6b is relieved, closing the corresponding uplink isolation switch, and recovering the normal power supply of the corresponding uplink traction network 6a or the downlink traction network 6 b.

When the traction substation breaks down and quits, the cross-area connection switch 4 is closed, and the power supply of the traction substation 9 adjacent to the left side and the power supply of the traction substation 10 adjacent to the right side to the large two sides in the range of the traction network are achieved.

When the fault of the traction substation is relieved and the power supply is recovered, the cross-area connection switch 4 is disconnected, the traction substation 9 adjacent to the left side and the traction substation 10 adjacent to the right side are quitted to supply power to the large bilateral in the range of the traction network, and the traction substation 9 adjacent to the left side, the traction substation 10 adjacent to the right side and the traction substation are recovered to supply power to the small bilateral of the traction network.

The utility model discloses a draw net power supply contact combination switch cabinet device can install in the electric substation or be close to near internet site position, need not other special measures, can realize effectively to the optimization of drawing net power supply scheme, saves engineering investment and transformer equipment area, realizes the operation flexibility and the fail safe nature of engineering.

Referring to embodiment 1 shown in fig. 3, the hand-off switch 4 is a circuit breaker 41.

Referring to embodiment 2 shown in fig. 4, the hand-off switch 4 is a disconnector (42).

Referring to fig. 5, in embodiment 3, the cross-over switch 4 is a breaker 41 with a disconnector 42 connected in series at one end.

Referring to the embodiment 4 shown in fig. 6, the cross-over switch 4 is a breaker 41 connected in parallel with a disconnector 42.

The above description is only used for illustrating the present invention, and it is not intended to limit the present invention to the specific structure and application range shown in the drawings, so all the corresponding modifications and equivalents that may be utilized all belong to the claims of the present invention.

Claims

1. The utility model provides a draw net power supply contact combination switch cabinet device which characterized by: the combined switch cabinet comprises an internet access isolating switch (3), a cross-area contact switch (4) and a combined switch cabinet body (8), wherein an uplink traction network (6a) corresponds to a first internet access isolating switch (31) and a fourth internet access isolating switch (34) which are independent, and a downlink traction network (6b) corresponds to a second internet access isolating switch (32) and a third internet access isolating switch (33) which are independent; one end of the first internet isolating switch (31) and one end of the second internet isolating switch (32) are respectively connected with the uplink traction network (6a) and the downlink traction network (6b), and the other ends of the first internet isolating switch and the second internet isolating switch are connected in parallel and then connected with the cross-zone interconnection switch (4); one ends of the third internet isolating switch (33) and the fourth internet isolating switch (34) are respectively connected with the uplink traction network (6a) and the downlink traction network (6b), and the other ends of the third internet isolating switch and the fourth internet isolating switch are connected with the cross-zone interconnection switch (4) after being connected in parallel; the cross-region contact switch (4), the first internet isolating switch (31), the second internet isolating switch (32), the third internet isolating switch (33) and the fourth internet isolating switch (34) are integrated in the combined switch cabinet body (8).

2. The traction network power supply interconnection combination switch cabinet device as claimed in claim 1, wherein: the cross-over switch (4) adopts a breaker (41).

3. The traction network power supply interconnection combination switch cabinet device as claimed in claim 1, wherein: the cross-connecting switch (4) adopts a disconnecting switch (42).

4. The traction network power supply interconnection combination switch cabinet device as claimed in claim 1, wherein: the cross-area communication switch (4) adopts a breaker (41), and one end of the breaker is connected with a disconnecting switch (42) in series.

5. The traction network power supply interconnection combination switch cabinet device as claimed in claim 1, wherein: the cross-area connection switch (4) adopts a breaker (41) which is connected with a disconnecting switch (42) in parallel.