Inter-station locking system and method for rail transit visual grounding device

Abstract

The invention discloses a rail transit visual grounding device inter-station locking system and a method thereof, and belongs to the technical field of rail transit, the rail transit visual grounding device inter-station locking system comprises a field-level equipment layer, a station-level management layer and a central management layer; the field-level equipment layer, the station-level management layer and the central management layer are sequentially connected through the Ethernet; the field-level equipment layer comprises a visual grounding device arranged in a traction substation; the station-level management layer comprises a monitoring host arranged in a station monitoring room; the central management layer comprises a monitoring master station arranged in an OCC dispatching room. On the basis that hardware cost is not increased, mutual locking between the visual grounding device and the adjacent station networking separation and cross-zone separation is achieved, electrified grounding of a contact network and power transmission with a grounding wire are prevented, safety of maintenance personnel and equipment is guaranteed, and the operation and maintenance level of rail transit power supply is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of rail transit, and particularly relates to an inter-station locking system and method for a visual grounding device of rail transit. Background Art

[0002] The existing visual grounding system for rail transit adopts a hierarchical and distributed system structure. The system consists of a central management layer, a station management layer, and a field device layer, and completes hierarchical control, centralized management, and decentralized layout through network communication. The visual grounding system is responsible for managing all visual grounding devices on the main line, and can perform operations of hanging or removing grounding wires on the catenary of all or a single power supply section. There is an electrical interlock between the visual grounding device in the traction substation (station) and the corresponding incoming disconnector, which can prevent the station from charging the grounding wire and sending power with the grounding wire connected.

[0003] In the existing rail transit traction power supply system, during normal operation, each power supply section on the main line is supplied by adjacent traction substations bilaterally. When any traction substation is disconnected, it is supplied by adjacent substations through large bilateral power supply. Since there may be multiple power sources for the catenary in each power supply section, when performing the operation of hanging the grounding wire, the above-mentioned in-station electrical interlock method can only ensure that there is no power source at the station end, and cannot ensure that there is no power source at the adjacent station end, thus there is a hidden danger of misclosing the visual grounding device with live electricity. When powering on the catenary, it can only ensure that the grounding wire of the visual grounding device at the station end is removed, and cannot ensure that the grounding wire of the visual grounding device at the adjacent station end is removed, thus there is a hidden danger of sending power with the grounding wire connected. Also, due to the long distance between stations, directly laying cables to obtain the position contact signals of the incoming disconnector, cross-section disconnector, and grounding switch from the adjacent station for electrical interlock will result in relatively high costs. Summary of the Invention

[0004] The purpose of the present invention is to address the above deficiencies in the prior art, and provide an inter-station locking system and method for a visual grounding device of rail transit, so as to solve the problem that the existing visual grounding system only has in-station electrical interlock, which may lead to the problems of charging the grounding wire on the catenary and sending power with the grounding wire connected during bilateral power supply or large bilateral power supply.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, an inter-station locking system for a visual grounding device of rail transit includes a field device layer, a station management layer, and a central management layer; the field device layer, the station management layer, and the central management layer are sequentially connected through an Ethernet network.

[0007] Further, the field device layer includes a visual grounding device arranged in the traction substation; the station management layer includes a monitoring host arranged in the station monitoring room; the central management layer includes a monitoring master station arranged in the OCC dispatching room.

[0008] In a second aspect, an inter-station locking method for an inter-station locking system of a visual grounding device for rail transit includes the following steps:

[0009] S101. The visual grounding device accesses the position contact signals of the on-net disconnector, cross-section disconnector, and grounding switch of the traction substation of this station through a cable, and converts the position contact signals into telemetry data through DI;

[0010] S102. The monitoring host is connected to the visual grounding device of this station through Ethernet and obtains the telemetry data of all visual grounding devices of this station in real time;

[0011] S103. The monitoring master station is connected to the monitoring hosts of the whole line through Ethernet and obtains the telemetry data of all monitoring hosts of the whole line in real time;

[0012] S104. When the monitoring master station operates the visual grounding device, according to the received telemetry data, calculate the locking logic of the visual grounding device. When the locking logic result is TRUE, send an operation command to the corresponding monitoring host;

[0013] S105. The monitoring host receives the operation command sent by the monitoring master station, verifies the operation command. When the operation command is valid, send an operation command to the corresponding visual grounding device. After receiving the operation command, the visual grounding device executes the corresponding operation;

[0014] S106. When the monitoring host operates the visual grounding device, send an operation application message to the monitoring master station;

[0015] S107. After receiving the operation application message, the monitoring master station performs locking logic calculation and replies with an operation permission or non-permission message according to the locking logic calculation result; Only when the monitoring host receives the operation permission reply message, send an operation command to the corresponding visual grounding device;

[0016] S108. When the visual grounding device operates locally, send an operation application message to the monitoring host. After receiving the operation application message, the monitoring host forwards the operation application message to the monitoring master station;

[0017] S109. When the monitoring master station sends an operation reply message according to the locking logic calculation result, after receiving the operation reply message, the monitoring host forwards it to the visual grounding device. After receiving the operation permission reply message, the visual grounding device performs the corresponding operation.

[0018] Furthermore, it further includes the following steps:

[0019] S110. When the PSCADA system operates the on-net disconnector and the crossover disconnector under its jurisdiction, it sends an operation application to the monitoring master station. The monitoring master station performs locking logic calculation on the corresponding switch and replies with an operation permission or non-permission message according to the calculation result.

[0020] S111. After the PSCADA system receives the operation permission reply message, it issues a remote control operation command to the corresponding switch.

[0021] Furthermore, in S103, a substation database is established in the monitoring master station to store the numbers and names of all substations in the whole line. An equipment database is established by substation classification to store the numbers, names, and locking logic information of all switches. According to the power supply schematic diagram, the locking logic is preset for each switch. If the locking logic result is TRUE, it replies with permission to operate; if the locking logic result is FALSE, it replies with non-permission to operate.

[0022] Furthermore, when in the bilateral power supply operation mode, the incoming power directions of the catenary power supply section 1 include: incoming power from SW2 of substation A, incoming power from ZL1 of substation A, incoming power from SW1 of substation B, and incoming power from ZL1 of substation B.

[0023] When hanging a grounding wire on the catenary power supply section 1, a closing operation is performed on the visual grounding devices of 2131E of substation A and 2111E of substation B. The closing locking logic of the visual grounding devices of 2131E of substation A and 2111E of substation B is as follows:

[0024] (1) The on-net disconnector of SW2 of substation A is in the off position;

[0025] (2) The crossover disconnector of ZL1 of substation A is in the off position;

[0026] (3) The on-net disconnector of SW1 of substation B is in the off position;

[0027] (4) The crossover disconnector of ZL1 of substation B is in the off position;

[0028] When conditions (1), (2), (3), and (4) are all met, the locking logic result is TRUE, and permission is given to perform a closing operation on the visual grounding device; if any one of the conditions is not met, the locking logic result is FALSE, and permission is not given to perform a closing operation on the visual grounding device.

[0029] Furthermore, when the catenary power supply section 1 is powered on, the PSCADA performs a closing operation on the on-net disconnectors of SW2 of substation A and SW1 of substation B. The closing locking logic of SW2 of substation A and SW1 of substation B is as follows:

[0030] (1) The grounding switch of 2131E of substation A is in the off position;

[0031] (2) The grounding switch of 2111E of substation B is in the off position;

[0032] When both conditions (1) and (2) are satisfied, the locking logic result is TRUE, allowing the closing operation of the incoming line disconnector; if either condition is not satisfied, the locking logic result is FALSE, and the closing operation of the incoming line disconnector is not allowed.

[0033] The inter-station locking system and method of the visual grounding device for rail transit provided by the present invention have the following

[0034] Beneficial effects:

[0035] The method of the present invention realizes the mutual locking between the visual grounding device and the incoming line disconnectors and cross-section disconnectors of adjacent stations, prevents the live grounding of the catenary and the power transmission with the grounding wire, ensures the safety of maintenance personnel and equipment, and improves the power supply operation and maintenance level of rail transit.

[0036] 2. On the basis of not increasing the hardware cost, the present invention uses a software method to realize the mutual locking between the visual grounding device and the incoming line disconnectors and cross-section disconnectors of adjacent stations, which can prevent the live grounding wire of the catenary and the power transmission with the grounding wire, and improve the safety of the traction power supply system of rail transit. Description of the Drawings

[0037] Figure 1 is a flow block diagram of the inter-station locking system and method of the visual grounding device for rail transit of the present invention.

[0038] Figure 2 is the locking logic during the bilateral power supply operation of the present invention. Detailed Embodiments

[0039] The following describes the detailed embodiments of the present invention to facilitate those skilled in the art of the present technology to understand the present invention. However, it should be clear that the present invention is not limited to the scope of the detailed embodiments. For those of ordinary skill in the art of the present technology, as long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are within the scope of protection.

[0040] Embodiment 1

[0041] This embodiment provides an inter-station locking system for a visual grounding device for rail transit. Refer to Figure 1 , which includes a field-level device layer, a station-level management layer, and a central-level management layer. The field-level device layer, the station-level management layer, and the central-level management layer are sequentially connected through Ethernet and communicate using the IEC104 protocol for power.

[0042] Specifically, the field-level device layer includes a visual grounding device installed in the traction substation, the station-level management layer includes a monitoring host installed in the station monitoring room, and the central-level management layer includes a monitoring master station installed in the OCC dispatching room.

[0043] Embodiment 2

[0044] Based on the system in Embodiment 1, this embodiment provides an inter-station locking method for the inter-station locking system of the rail transit visual grounding device, which can prevent the contact network from being grounded with live wires and energizing with grounded wires, and improve the safety of the rail transit traction power supply system. Refer to Figure 1 , and it includes the following steps:

[0045] S101. The visual grounding device accesses the position contact signals of the on-net disconnector, cross-section disconnector, and grounding switch in the traction substation of this station through cables, and converts the position contact signals into telecontrol signals through DI (open position = 0, closed position = 1);

[0046] S102. The monitoring host is connected to the visual grounding device of this station through Ethernet, and obtains the telecontrol signals of all visual grounding devices of this station in real time through the IEC104 protocol;

[0047] S103. The monitoring master station is connected to the monitoring hosts of the whole line through Ethernet, and obtains the telecontrol signals of all monitoring hosts of the whole line in real time through the IEC104 protocol;

[0048] Specifically, in this embodiment, the monitoring master station establishes a substation database to store information such as the numbers and names of all substations of the whole line; establishes an equipment database classified by substations to store information such as the numbers, names, and locking logics of all switches; and pre-sets the locking logic for each switch according to the power supply schematic diagram;

[0049] During specific operations, the monitoring master station provides a locking logic calculation service. After receiving an operation application from the station-level monitoring host or PSCADA, it searches for the pre-set locking logic according to the switch number applied for, and then calculates the locking logic result. If the locking logic result is TRUE, it responds to allow the operation; if the locking logic result is FALSE, it responds not to allow the operation.

[0050] S104. When the monitoring master station operates the visual grounding device, it calculates the locking logic of the visual grounding device according to the received telecontrol signals. When the locking logic result is TRUE, it sends an operation command to the corresponding monitoring host;

[0051] S105. The monitoring host receives the operation command sent by the monitoring master station, verifies the operation command. When the operation command is valid, it sends an operation command to the corresponding visual grounding device, and the visual grounding device executes the corresponding operation (closing or opening) after receiving the operation command;

[0052] S106. When the monitoring host operates the visual grounding device, it sends an operation application message to the monitoring master station;

[0053] S107. After receiving the operation application message, the monitoring master station performs locking logic calculation and replies with an operation permission or non - permission message according to the result of the locking logic calculation; Only when the monitoring host receives the operation permission reply message, it issues an operation command to the corresponding visual grounding device;

[0054] S108. When the visual grounding device operates locally, it first sends an operation application message to the monitoring host, and after receiving the operation application message, the monitoring host forwards the operation application message to the monitoring master station;

[0055] S109. When the monitoring master station issues an operation reply message according to the result of the locking logic calculation, after receiving the operation reply message, the monitoring host forwards it to the visual grounding device, and the visual grounding device performs corresponding operations after receiving the operation permission reply message;

[0056] S110. When the PSCADA system operates the on - line disconnector and cross - zone disconnector under its jurisdiction, it first sends an operation application to the monitoring master station, and the monitoring master station performs locking logic calculation on the corresponding switch and replies with an operation permission or non - permission message according to the calculation result;

[0057] S111. When the PSCADA system receives the operation permission reply message, it issues a remote control operation command to the corresponding switch.

[0058] Reference Figure 2 , in this embodiment, the bilateral power supply operation mode is used for illustration. The incoming power directions of the catenary power supply section 1 include: power incoming from SW2 of station A, power incoming from ZL1 of station A, power incoming from SW1 of station B, and power incoming from ZL1 of station B;

[0059] When hanging a grounding wire on the catenary power supply section 1, it is necessary to perform a closing operation on the visual grounding devices of 2131E of station A and 2111E of station B. The closing locking logic of the visual grounding devices of 2131E of station A and 2111E of station B is as follows:

[0060] (1) The on - line disconnector of SW2 at station A is in the off position;

[0061] (2) The cross - zone disconnector of ZL1 at station A is in the off position;

[0062] (3) The on - line disconnector of SW1 at station B is in the off position;

[0063] (4) The cross - zone disconnector of ZL1 at station B is in the off position;

[0064] When conditions (1), (2), (3), and (4) are all satisfied, the locking logic result is TRUE, allowing the closing operation of the visual grounding device; if any one of the conditions is not satisfied, the locking logic result is FALSE, and the closing operation of the visual grounding device is not allowed.

[0065] When the power supply section 1 of the catenary is energized, PSCADA performs the closing operation on the switching disconnectors SW2 at station A and SW1 at station B. The closing locking logic for SW2 at station A and SW1 at station B is as follows:

[0066] (1) The earthing switch 2131E at station A is in the off position;

[0067] (2) The earthing switch 2111E at station B is in the off position;

[0068] When conditions (1) and (2) are both satisfied, the locking logic result is TRUE, allowing the closing operation of the switching disconnector; if any one of the conditions is not satisfied, the locking logic result is FALSE, and the closing operation of the switching disconnector is not allowed.

[0069] Although the specific implementation manners of the invention have been described in detail with reference to the accompanying drawings, it should not be construed as a limitation on the protection scope of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative efforts still fall within the protection scope of this patent.

Claims

1. A rail transit visual grounding device station locking system, characterized in that: It includes a field-level device layer, a station-level management layer and a central-level management layer; the field-level device layer, the station-level management layer and the central-level management layer are connected in sequence via Ethernet.

2. The rail transit visualized grounding device station interlocking system according to claim 1 is characterized by: The field-level equipment layer includes a visual grounding device installed in a traction substation; the station-level management layer includes a monitoring host installed in a station monitoring room; and the central-level management layer includes a monitoring master station installed in an OCC dispatching room.

3. An inter-station locking method of the inter-station locking system of a rail transit visualized grounding device according to claim 1 or 2, characterized in that: The following steps are involved: S101, the visual grounding device is connected to the position contact signals of the on-grid isolation, cross-area isolation and grounding switch of the traction substation of the station through cables, and the position contact signals are converted into telesignaling data through DI; S102, the monitoring host is connected to the visual grounding device of the station via Ethernet, and obtains the remote signaling data of all the visual grounding devices of the station in real time; S103, the monitoring master station is connected to the monitoring hosts of the entire line through Ethernet, and obtains the remote signaling data of all monitoring hosts of the entire line in real time; S104, when the monitoring master station operates the visual grounding device, the blocking logic of the visual grounding device is calculated according to the received telesignaling data, and when the blocking logic result is TRUE, an operation command is sent to the corresponding monitoring host; S105, the monitoring host receives the operation command sent by the monitoring master station, verifies the operation command, and when the operation command is valid, sends the operation command to the corresponding visual grounding device, and the visual grounding device performs the corresponding operation after receiving the operation command; S106, when the monitoring host operates the visual grounding device, it sends an operation application message to the monitoring main station; S107, after receiving the operation application message, the monitoring host performs a blocking logic calculation, and responds with an operation permission or disapproval message according to the blocking logic calculation result; only after the monitoring host receives the operation permission response message, the monitoring host sends an operation command to the corresponding visual grounding device; S108, when the visualized grounding device is operated locally, it sends an operation application message to the monitoring host, and after receiving the operation application message, the monitoring host forwards the operation application message to the monitoring main station; S109. When the monitoring host sends an operation response message according to the calculation result of the locking logic, the monitoring host forwards the operation response message to the visual grounding device after receiving it. The visual grounding device receives the operation permission response message and performs corresponding operations.

4. The inter-station locking method of the inter-station locking system of the rail transit visualized grounding device according to claim 3 is characterized in that: The following steps are also included: S110, when operating the Internet isolation and cross-zone isolation under its jurisdiction, the PSCADA system sends an operation application to the monitoring main station, and the monitoring main station performs a blocking logic calculation on the corresponding switch and responds with an operation permission or disapproval message according to the calculation result; S111. When the PSCADA system receives the operation permission response message, it sends a remote control operation command to the corresponding switch.

5. The inter-station locking method of the inter-station locking system of the rail transit visualized grounding device according to claim 3 is characterized in that: In S103, a plant station database is established at the monitoring main station to save the number and name information of all plant stations in the entire line. An equipment database is established according to the plant station classification to save the number, name, and locking logic information of all switches. According to the power supply diagram, the locking logic is pre-set for each switch; if the locking logic result is TRUE, the operation is allowed, and if the locking logic result is FALSE, the operation is not allowed.

6. The inter-station locking method of the inter-station locking system of the rail transit visualized grounding device according to claim 3 is characterized in that: When the double-sided power supply operation mode is used, the incoming call directions of overhead power supply section 1 include: incoming call from SW2 of station A, incoming call from ZL1 of station A, incoming call from SW1 of station B, and incoming call from ZL1 of station B; When the ground wire is hung in the overhead power supply section 1, the 2131E of station A and the 2111E visual grounding device of station B are closed. The closing and locking logic of the 2131E of station A and the 2111E visual grounding device of station B is: (1) The SW2 of station A is isolated from the Internet and is in a split position; (2) ZL1 of station A is in the split position across the zone; (3) The SW1 of station B is isolated from the Internet and is in the split position; (4) ZL1 of station B is in the split position across the zone; When conditions (1), (2), (3), and (4) are all met, the blocking logic result is TRUE, allowing the visual grounding device to be closed; if any one of the conditions is not met, the blocking logic result is FALSE, and the visual grounding device is not allowed to be closed.

7. According to the inter-station interlocking method of the inter-station interlocking system of the rail transit visualized grounding device of claim 6, when the overhead line power supply section 1 is energized, PSCADA performs a closing operation on the SW2 of station A and the SW1 of station B to separate the online connection, and the closing and locking logic of the SW2 of station A and the SW1 of station B is: (1) The 2131E grounding switch of station A is in the open position; (2) The 2111E grounding switch of station B is in the open position; When conditions (1) and (2) are both met, the blocking logic result is TRUE, allowing the online disconnector to be closed; if any one of the conditions is not met, the blocking logic result is FALSE, and the online disconnector is not allowed to be closed.

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