GB2538200A

GB2538200A - High-voltage circuit for security transition from third rail power supply to intra-garage power supply

Info

Publication number: GB2538200A
Application number: GB1614089.9A
Authority: GB
Inventors: Xiao Chanjuan; Zhang Huiqing; Tian Qing; Jiang Fujie; Liu Yuwen; Jiang Xin; Ding Sansan
Original assignee: CRRC Qingdao Sifang Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd
Priority date: 2014-11-27
Filing date: 2015-10-29
Publication date: 2016-11-09
Anticipated expiration: 2035-10-29
Also published as: CN104527459A; GB201614089D0; AR102763A1; GB2538200B; WO2016082650A1; CN104527459B

Abstract

A high-voltage circuit for security transition from a third rail power supply to an intra-garage power supply. The high-voltage circuit comprises current collectors, inter-vehicle power sources, high-voltage buses, power supply buses of the inter-vehicle power sources and main switches. The inter-vehicle power sources are all connected to the power supply buses of the inter-vehicle power sources, so as to supply power to vehicles. Each of the main switches is a double-pole double-throw switch, a switch S1 in the main switch can be thrown to an end point P1 or P2, and a switch S2 can be thrown to an end point P3 or P4; the end point P1 of the main switch in each carriage is connected to each of the high-voltage buses, and the end point P2 is connected to each of the power supply buses of the inter-vehicle power sources, so as to achieve isolation between the high-voltage buses and the power supply buses of the inter-vehicle power sources; the end point P3 is connected to a traction power consumption end or a power consumption end of an auxiliary power source; and the end point P4 is grounded. A contactor K1 is arranged on each of the high-voltage buses. The high-voltage circuit can achieve the security transition from the power supply of current collectors to the power supply of power sources for garages, and therefore the security of a maintainer can be ensured, and the security and reliability of the maintenance operation can be ensured.

Description

HIGH-VOLTAGE CIRCUIT FOR SECURITY TRANSITION FROM THIRD RAIL

POWER SUPPLY TO INTRA-GARAGE POWER SUPPLY

100011 The present application claims the priority to Chinese Patent Application No, 201410712622 7, titled "SAFE TRANSITION HIGH-VOLTAGE CIRCUIT BETWEEN THIRD-RAIL POWER SUPPLY AND GARAGE POWER SUPPLY", filed with the Chinese State Intellectual Property Office on November 27, 2014, which is incorporated herein by reference in its entirety

FIELD

100021 The present disclosure relates to the field of electrical technology, and in particular to a high-voltage circuit for security transition from third rail power supply to shed power supply.

BACKGROUND

100031 At a car depot of the Sarmiento line in Argentina, there is an area with no power supply about 10 meters long between a third rail and a shed. The customer requires that a railcar may be designed to be powered by shed power supply instead of third rail power supply, and the railcar may be pulled by the shed power supply, such that the railcar may safely transit into the shed In the conventional technology, the railcar is powered by the third tail directly A driver drives the railcar into the shed, and the railcar reaches a destination by means of running inertia of the railcar after leaving the third rail. Since traction buses of the whole railcar are connected together, a current collector driven into the shed is electrified in a case that a current collector connected to the third rail is electrified, and there are many hidden dangers such as electric shock of maintenance personnel in the shed.

100041 Hence, it is urgent to provide a high-voltage circuit for security transition from the third rail power supply to the shed power supply, to realize a security transition from current collector power supply to the shed power supply.

SUNIN1ARY [0005] In view of the deficiency in the conventional technology, a high-voltage circuit for security transition from third rail power supply to shed power supply is provided in the present disclosure, to realize a safe transition from current collector power supply to the shed power supply, and achieve safety of maintenance personnel and safety and reliability of maintenance work.

[0006] To achieve the above objects, a technical solution is provided in the present disclosure as follows.

[0007] A high-voltage circuit for security transition from third rail power supply to shed power supply is provided. The circuit includes current collectors, shop power receptacles, a high-voltage bus, power supply buses for the shop power receptacles, and main switches.

100081 Number of the current collectors and number of the main switches are the same as number of carriages, and number of the shop power receptacles is equal to or greater than two 100091 The current collector in each of the carriages is connected to the high-voltage bus, to supply power to the high-voltage bus.

100101 The shop power receptacles are connected to the power supply buses for the shop power receptacles, to supply power to the power supply buses for the shop power receptacles.

100111 The main switches are double-pole double-throw switches, a switch Si of the main switches is thrown to a port P1 or P2, a switch 52 of the main switches is thrown to a port P3 or P4, the port P1 of the main switches in each of the carriages is connected to the high-voltage bus, the port P2 of the main switches in the railcars is connected to the power supply buses for the shop power receptacles, the port P3 of the main switches in the railcars is connected to a traction power port or an auxiliary power port, and the port P4 of the main switches in the railcars is grounded.

[0012] The contactor K t is arranged on the high-voltage bus.

[0013] Preferably, the contactor Kl is arranged at the middle of the high-voltage bus. [0014] Preferably, two contactors Kl are arranged equidistantly on the high-voltage bus in a case that the number of the carriages in a railcar is greater than a first threshold and less than a second threshold.

[0015] Preferably, the first threshold is 8, and the second threshold is 14.

[0016] Preferably, three contactors K1 are arranged equidistantly on the high-voltage bus in a case that the number of the carriages in the railcar is greater than the second threshold.

[0017] Preferably, the shop power receptacles are arranged at both ends of the railcar 100181 It can be known from the above description, with the high-voltage circuit for security transition from the third rail power supply to the shed power supply according to the present disclosure, a multi-marshalling railcar can be moved safely into the shed, and a position for the K1 and a parking point are selected based on an actual position. The circuit has a simple structure, control is reliable, and the safe transition from the current collector power supply to the shed power supply can be realized, thereby achieving the safety of maintenance personnel and the safety and reliability of maintenance work.

BRIEF DESCRIPTION OF THE DRAWINGS

100191 The drawings to be used in the description of embodiments of the present disclosure or the conventional technology are briefly described hereinafter, such that technical solutions according to the embodiments of the present disclosure or according to the conventional technology become clearer. It is apparent that the drawings in the following description illustrate some embodiments of the present disclosure For those skilled in the art, other drawings may be obtained according to these drawings without any creative work [0020] Figure 1 is a structural diagram of a high-voltage circuit for security transition from third rail power supply to shed power supply according to a first embodiment of the present disclosure; [0021] Figure 2 is a structural diagram of a main switch; 100221 Figure 3 is a diagram showing a railcar driven from a railway yard to a shed; and [0023] Figure 4 is a diagram showing a railcar driven from a shed to a railway yard.

DETAILED DESCRIPTION

[0024] To make the object, the technical solution and advantages of the present disclosure clearer, the technical solution according to the embodiments of the present disclosure will be described clearly and completely hereinafter in conjunction with the drawings in the embodiments of the present disclosure. It is apparent that the described embodiments are only a few rather than all of the embodiments of the present disclosure. Any other embodiment obtained by those skilled in the art based on the embodiments of the present disclosure without any creative work fall within the scope of protection of the present disclosure.

[0025] Figure 1 is a structural diagram of a high-voltage circuit for security transition from third rail power supply to shed power supply according to a first embodiment of the present disclosure Referring to Figure 1, the high-voltage circuit for security transition from the third rail power supply to the shed power supply includes current collectors, shop power receptacles, a high-voltage bus, a power supply bus for the shop power receptacles, and main switches. The number of the current collectors and the number of the main switches are the same as the number of carriages, and the number of the shop power receptacles is greater than two.

[0026] The current collector in each of the railcars is connected to the high-voltage bus to supply power to the high-voltage bus.

[0027] Each of the shop power receptacles is connected to the power supply bus for the shop power receptacles to supply power to the power supply bus for the shop power receptacles.

[0028] As shown in Figure 2, each of the main switches is a double-pole double-throw switch, a switch Si of the main switches can be thrown to an port PI or P2, a switch S2 of the main switches can be thrown to an port P3 or P4, the port PI of the main switches in each of the carriages is connected to the high-voltage bus, the port P2 of the main switches in each of the railcars is connected to the power supply bus for the shop power receptacles, the port P3 of the main switches in each of the railcars is connected to a traction power port or an auxiliary power port, and the port P4 of the main switches in each of the railcars is Grounded.

[0029] A contactor K1 is arranged on the high-voltage bus.

[0030] Specifically, the port PI of the main switches is connected to the high-voltage bus, and the port P2 of the main switches is connected to the power supply bus for the shop power receptacles, to isolate the high-voltage bus from the power supply bus for the shop power receptacles.

100311 Specifically, the current collectors are connected to the high-voltage bus, the shop power receptacles are connected to the power supply bus for the shop power receptacles, and both the current collectors and the shop power receptacles supply power to the railcar.

[0032] With the high-voltage circuit for security transition from the third rail power supply to the shed power supply according to the present disclosure, a multi-marshalling railcar can be moved safely into the shed, and a position for the contactor K1 and a parking point are selected based on an actual position. The circuit can realize the safe transition from the current collector power supply to the shed power supply, thereby achieving the safety of maintenance personnel and the safety and reliability of maintenance work.

[0033] An operating principle of the circuit of the present disclosure is introduced by taking the following five operating conditions as examples: a railcar operation on a metro line, a railcar movement into a shed, railcar maintenance in the shed, power-on debugging for the railcar in the shed, and driving the railcar out of the shed into a railway yard.

[0034] A second embodiment: a railcar operation on a metro line [0035] In a case that the railcar operates on a metro line, a control switch is manipulated in a driver cab. As shown in Figure 1, a railcar traction equipment is provided in railcar 2, 3, 4 and 5 respectively without auxiliary power supply, and an auxiliary power supply equipment for a whole railcar is provided in railcar 1 and 6 respectively without a traction equipment, therefore, the port P3 of the main switches in railcar 2, 3, 4 and 5 is connected to the traction power port, and the port P3 of the main switches in railcar 1 and 6 is connected to an auxiliary power port. The contactor K1 is closed, a switch SI of a main switch box in each of the railcars is thrown to P1, and a switch S2 of the main switch box in each of the railcars is thrown to P3. In this case, the railcar collects a current via the third rail, and provides power to a railcar traction system and an auxiliary system are powered via PI of the switch Si and P3 of the switch S2.

100361 The third embodiment: a railcar movement into a shed [0037] In step 301, for safety of a shed staff, a driver manipulates the switches and open K1 in Figure 1 after driving the railcar into a railway yard line.

[0038] As shown in Figure 3, the K1 is arranged at the middle of the exemplary circuit, and a six-marshalling railcar is divided into two units. A locomotive of the railcar is parked at a parking point 1 when the railcar is moved from the railway yard into the shed A position of the parking point meets the following conditions: A. current collectors in at least the unit of lead railcars (railcars 4, 5 and 6) are disconnected from the third rail; B. the shed staff stays as far away from the third rail as possible when adjusting a position of the main switch; C. a socket of the shop power receptacle arranged at the locomotive of the railcar can come into contact with a plug of the shop power receptacle having a sliding contact wire, and D the 1(1 is located in an area without power between the shed and the third rail [0039] In step 302, the shed staff manually throws from P1 to P2 the main switch box only in railcar 6 driven into the shed. Based on a requirement for railcar traction capacity, Si in one or two of railcars 4 and 5 may be thrown to P2, Si in other railcars are located at Pl, and S2 of all the railcars are located at P3. The inter-railcar power supply in railcar 6 is applied, railcars 1, 2 and 3 in a rear of the railcar are powered via the third rail in this case, and traction auxiliary systems of railcars 4, 5, and 6 or traction auxiliary systems of railcars 4 and 6 or traction auxiliary systems of railcars 5 and 6 are powered via the shop power receptacles, [0040] In step 303, the railcar is pulled by the driver to continue moving, and subsequent railcars are disconnected from the third rail successively; the railcar keeps moving by means of the shop power receptacles; and the driver parks the railcar after moving the railcar to the right place.

[0041] In step 304, the driver unplugs the plugs of the shop power receptacles, and returns the switch Si of each of the main switches to Pl.

[0042] The fourth embodiment: railcar maintenance in the shed [0043] In step 401, the shop power receptacles are removed, and no high-voltage power is inputted to the railcar in this case.

[0044] In step 402, it is determined that the switch SI in the maintained railcar is located at PI, the switch S2 is thrown to P4, and a high-voltage circuit of the railcar is grounded in this case [0045] In step 403, in a case that other maintenance personnel connects the shop power receptacles to the switch SI by mistake, a high-voltage electricity, which flows to P4 of the switch S2 of the switch box where the maintenance personnel is located through other railcars, is grounded, thereby achieving the safety of the maintenance personnel.

100461 In step 404, after the maintenance is finished, each of the switches S2 is returned to P3.

100471 The fifth embodiment: power-on debugging for the railcar in the shed 100481 In step 501, the shop power receptacles are disconnected, and no high-voltage electricity is inputted to the railway in this case [0049] In step 502, 51 of the railcar to be debugged is thrown to P2, and the switch SI in at least one railcar provided with the shop power receptacles is thrown to P2.

[0050] In step 503, SI in other railcars remain to be located at PI, and the switches S2 in all railcars are thrown to P3.

[0051] In step 504, the shop power receptacles are applied to supply power to the railcar, and the powered railcar obtains the high-voltage power supply for operating.

[0052] In step 505, all the switches SI are returned to P1 after the debugging for the railcar is finished.

100531 The sixth embodiment: driving the railcar out of the shed into a railway yard [0054] In step 601, the railcar is parked in the shed, and the shop power receptacles are 25 disconnected 100551 In step 602_ it is checked first that switches S2 in all the railcars are thrown to P3, switches SI in railcars 1, 2 and 3 are thrown to P1, and Si in railcar 6 is thrown from P1 to P2. Based on the traction capacity of the railcar, Si in one or two of railcar 4 and 5 may be thrown to P2.

[0056] In step 603, the inter-railcar power supply in railcar 6 is applied, and the railcar is powered by inter-railcar shed power supply.

[0057] In step 604, in a case that the railcar is moved from the shed on the railway yard line, as shown in Figure 4, the railcar is parked at a parking point 2, and a position of the parking point 2 meets the following conditions: A. at least railcar 1 comes into contact with the third rail; B the shed staff stays as far away from the third rail as possible when adjusting a position of the main switches; C. the plug of the inter-railcar power supply having the sliding contact wire does not be pulled too tight; and D. the K1 is located in an area without power between the third rail and the shed.

100581 In step 605, the shed staff unplugs the plug of the inter-railcar power supply, and manually throws the S1 in each of the last three railcars (railcars 4, 5 and 6) from P2 to Pl, and the railcar is powered via the third rail.

[0059] In step 606, the railcar collects current via the third rail, and is able to run normally.

The driver manipulates the switches and resets the contactor K1 after the railcar leaves the railway yard.

[0060] Preferably, the contactor K1 is arranged at the middle of the high-voltage bus in a case that only one contactor K1 is provided to the high-voltage bus.

100611 Preferably, two contactors K1 are arranged equidistantly at the high-voltage bus in a case that the number of the carriages of the railcar is greater than the first threshold and less than the second threshold.

100621 The first threshold is 8, and the second threshold is 14.

[0063] Preferably, three contactors K1 are arranged equidistantly on the high-voltage bus in a case that the number of the carriages of the railcar is greater than the second threshold Table 1 below shows a reference for position arrangement of K1 for various marshalling railcars.

Table 1 Reference for position arrangement of K1 for various marshalling railcars railc railc railc railc I railc railc railc railc railc I rema -8 -an 1 ar 2 ar 3 ar 4 ar 5 ar 6 ar 7 ar 8 ar 9 rks 3-ma T M T rshal ling x 4-ma IMM T rshal ling x 5-ma IMMM T rshal ling x 6-ma T M MM Ni T rshal ling x 7-ma T MMMMM T rshal ling x 8-ma T M MM M MM T rshal ling x 9-ma T M MM M MM M T rshal ling x x [0064] The number of railcar corresponding to "x" in the Table 1 is a position of the contactor K1 [0065] Furthermore, the shop power receptacles are arranged at two ends of the railcar.

[0066] Furthermore, the following should be addressed for arrangements of practical circuits the contactor Kl is controlled to be opened or to be closed by the driver in the driver cab, 1(1 is arranged in the middle of the railcar as much as possible, the parking points for the railcar entering and leaving the shed allow Kl to be located in the area without power between the third rail and the shed, the shop power receptacles should be arranged at two ends of the railcar as much as possible, the shed staff stays as far away from the third rail as possible when adjusting the position of the main switch, and the sockets of the shop power receptacles installed at a locomotive can come into contact with the plugs of the shop power receptacles having a sliding contact wire.

100671 With the circuit of the present disclosure, multiple-marshalling railcar can be moved safely within the shed, and a position for the K1 and the parking point are selected based on an actual position. The position or the number of the Kt can be adjusted based on a length of the area without power and a marshalling condition.

100681 Considering the security, the issue of security transition from the third rail power supply to the shed power supply is addressed with the circuit of the present disclosure. The circuit of the present disclosure has a simple structure, the control is reliable, and security movement of multi-marshalling railcars in the shed and movement of railcar in the shed in a case of various lengths of the area without power can be realized. In addition, the safety of maintenance personnel and the safety and reliability of maintenance work may be achieved with the circuit.

100691 The embodiments described above are merely intended to describe the technical solutions of the present disclosure, but are not intended to limit the present disclosure. Although the present disclosure is described in detail with reference to the foregoing embodiments, it can be understood by those skilled in the art that, modification can be made to the technical solution described in the foregoing embodiments, or equivalent substitutions can be made to some technical features in the technical solution; and such modification or substitutions do not make the essence of the technical solution depart from the essence and scope of the technical solution according to the embodiments of the present disclosure.

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Claims

CLAIMS1. A high-voltage circuit for security transition from third rail power supply to shed power supply, comprising current collectors, shop power receptacles, a high-voltage bus, power supply buses for the shop power receptacles, and main switches, wherein number of the current collectors and number of the main switches are both the same as number of carriages, and number of the shop power receptacles is equal to or greater than two; the current collector in each of the carriages is connected to the high-voltage bus, to supply power to the high-voltage bus; the shop power receptacles are connected to the power supply buses for the shop power receptacles, to supply power to the power supply buses for the shop power receptacles.the main switches are double-pole double-throw switches, a switch Si of the main switches is thrown to a port PI or P2, a switch S2 of the main switches is thrown to a port P3 or P4, the port P1 of the main switches in each of the carriages is connected to the high-voltage bus, the port P2 of the main switches in the railcars is connected to the power supply buses for the shop power receptacles, the port P3 of the main switches in the railcars is connected to a traction power port or an auxiliary power port, and the port P4 of the main switches in the railcars is grounded; and a contactor 1(1 is arranged on the high-voltage bus.
2. The circuit according to claim 1, wherein the contactor K1 is arranged at the middle of the high-voltage bus.
3. The circuit according to claim I, wherein two contactors K! are arranged equidistantly on the high-voltage bus in a case that the number of the carriages in a railcar is greater than a first threshold and less than a second threshold.
4. The circuit according to claim 3, wherein the first threshold is 8, and the second threshold is 14.
5. The circuit according to claim 4, wherein three contactors are arranged equidistantly on the high-voltage bus in a case that the number of the carriages in the railcar is greater than the second threshold.
6. The circuit according to any one of claims I to 5, wherein the shop power receptacles are arranged at both ends of the railcar.-12 -