Traction control systems and rail transit systems

Abstract

The present invention provides a traction control system and a rail transit system, wherein the traction control system includes a plurality of control stations, each of which includes at least one motor control unit, at least one converter control unit and a backbone network communication unit; each motor control unit and each converter control unit of each control station are connected to the backbone network communication unit of the same control station, and the backbone network communication units of each control station are connected in communication, wherein the backbone network communication unit includes a packet transmission network device. Each control station communicates by using the packet transmission network device as the backbone network communication unit of the communication device, so that control stations at a long distance can communicate and realize long-distance communication control, which can match the current development of Ethernet technology and the trend of IP-based control equipment, and effectively simplifies the wiring complexity of motor control units and converter control units of different control stations.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit control network, and in particular to a traction control system and a rail transit system. Background Art

[0002] As rail transit pursues higher speeds, the on-board traction control system has also been moved to the traction substation along the track, and the on-board traction control system has been transformed from on-board centralized control to distributed control. The traction control system has changed from the traditional on-board TCU (transmission control unit) to MCU (Motor Control Unit) and CCU (Converter Control Unit).

[0003] The current distributed traction control system uses a communication technology based on SDH (Synchronous Digital Hierarchy) technology, which solves the communication and control functions between the MCU and CCU between two traction substations. With the development of Ethernet technology and the trend of IP-based control equipment, this technical solution cannot be applied to the existing technical route, and the data exchange between control partitions needs to be converted through other communication methods, which fails to effectively solve the multi-site networking solution. Summary of the invention

[0004] Based on this, it is necessary to provide a traction control system and a rail transit system to address the above technical problems.

[0005] A traction control system comprises: a plurality of control sites, each of the control sites comprising at least one motor control unit, at least one converter control unit and a backbone network communication unit;

[0006] Each motor control unit and each converter control unit of each control site is connected to the backbone network communication unit of the same control site, and the backbone network communication units of each control site are communicatively connected, wherein the backbone network communication unit includes a packet transmission network device.

[0007] In one embodiment, the motor control unit includes a first motor control unit and a second motor control unit, the converter control unit includes a first converter control unit and a second converter control unit, and the backbone network communication unit includes a first backbone network communication unit and a second backbone network communication unit;

[0008] Each of the control sites includes at least one of the first motor control unit, at least one of the second motor control unit, at least one of the first converter control unit, at least one of the second converter control unit, one of the first backbone network communication unit and one of the second backbone network communication unit;

[0009] Each of the first motor control units and each of the first converter control units of each of the control sites is connected to the first backbone network communication unit of the same control site;

[0010] Each of the second motor control units and each of the second converter control units of each of the control sites is connected to the second backbone network communication unit of the same control site;

[0011] The first backbone network communication unit and the second backbone network communication unit of the same control site are connected to each other, the first backbone network communication unit of each control site is communicatively connected, and the second backbone network communication unit of each control site is communicatively connected.

[0012] In one embodiment, each of the control stations includes two of the first motor control units and three of the first converter control units.

[0013] In one embodiment, each of the control stations includes two of the second motor control units and three of the second converter control units.

[0014] In one embodiment, the backbone network communication unit further includes an optical transport network device.

[0015] In one embodiment, each motor control unit and each converter control unit of each control site are connected to the backbone network communication unit of the same control site via Ethernet.

[0016] In one embodiment, the connection architecture of the backbone network communication units of each of the control sites is a ring network.

[0017] In one embodiment, at least one of the control sites further comprises a clock unit, and the clock unit is connected to the backbone network communication unit of the same control site.

[0018] In one embodiment, three adjacent control sites are provided with a clock unit, and the clock unit is used to provide a clock signal for the three adjacent control sites.

[0019] A rail transit system comprises the traction control system described in any one of the above embodiments.

[0020] In the above-mentioned traction control system and rail transit system, each control station communicates by using packet transmission network equipment as the backbone network communication unit of the communication equipment, so that control stations that are far away can communicate and realize long-distance communication control. It can match the current development of Ethernet technology and the trend of IP-based control equipment, effectively simplify the wiring complexity of motor control units and converter control units of different control stations, realize real-time high-speed Ethernet communication, and solve the delay and jitter when sending and receiving data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the architecture of a traction control system in one embodiment;

[0022] Figure 2 is a schematic diagram of the architecture of a traction control system in another embodiment;

[0023] Figure 3 It is a schematic diagram of the architecture of a traction control system in yet another embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Embodiment 1

[0027] In this embodiment, Figure 1 As shown, a traction control system is provided, comprising: a plurality of control sites, each of the control sites comprising at least one motor control unit, at least one converter control unit and a backbone network communication unit; each of the motor control units and each of the converter control units of the control site is connected to the backbone network communication unit of the same control site, and the backbone network communication units of the control sites are communicatively connected, wherein the backbone network communication unit comprises a packet transmission network device.

[0028] In this embodiment, the control site can also be called a substation, and each control site is a substation. Figure 3As shown, substation 1, substation 2, substation 3, substation 4 and substation 5 are all control sites. The motor control unit and the converter control unit are connected to the control network through the backbone network communication unit, so that the motor control units and converter control units of different control sites can communicate. In this embodiment, the backbone network communication unit is implemented by a packet transport network device (PTN, Packet Transport Network). Through the packet transport network device, the control nodes can communicate through Ethernet, and each unit and each device can access Ethernet based on the IP address, making the communication more convenient and efficient. And it can effectively extend the communication distance. In this embodiment, the distance between substation 1, substation 2, substation 3, substation 4 and substation 5 is 50km, or less than 50km, so that the network of more than 1000km of trunk lines and no less than 20 control sites can be met.

[0029] In this embodiment, the purpose is to protect the architecture of the improved traction control system, which is constructed based on a network built by a backbone network communication unit. The communication network of the backbone network communication unit can be implemented using existing network technologies, such as packet transport network equipment or OTN (optical transport network) equipment. Regardless of the network used, the key to the solution of this application lies in the overall architecture of the traction control system.

[0030] In the above embodiment, each control site communicates by using a packet transmission network device as a backbone network communication unit of the communication device, so that control sites that are far away can communicate and achieve long-distance communication control. It can match the current development of Ethernet technology and the trend of IP-based control equipment, effectively simplify the wiring complexity of the motor control units and converter control units of different control sites, realize real-time high-speed Ethernet communication, and solve the delay and jitter when sending and receiving data.

[0031] To achieve redundancy in the traction control system, in one embodiment, Figure 2As shown, the motor control unit includes a first motor control unit and a second motor control unit, the converter control unit includes a first converter control unit and a second converter control unit, and the backbone network communication unit includes a first backbone network communication unit and a second backbone network communication unit; each of the control sites includes at least one first motor control unit, at least one second motor control unit, at least one first converter control unit, at least one second converter control unit, a first backbone network communication unit and a second backbone network communication unit; each of the first motor control units and each of the first converter control units of each of the control sites is connected to the first backbone network communication unit of the same control site; each of the second motor control units and each of the second converter control units of each of the control sites is connected to the second backbone network communication unit of the same control site; the first backbone network communication unit and the second backbone network communication unit of the same control site are connected to each other, the first backbone network communication unit of each of the control sites is in communication connection, and the second backbone network communication unit of each of the control sites is in communication connection.

[0032] In this embodiment, the first motor control unit, the first converter control unit, the first backbone network communication unit and the second motor control unit, the second converter control unit, and the second backbone network communication unit back up each other, that is, the lines where the first motor control unit, the first converter control unit, and the first backbone network communication unit are located and the lines where the second motor control unit, the second converter control unit, and the second backbone network communication unit are located back up each other. In this way, each control site has two sets of redundant control units, thereby realizing redundancy of the communication equipment of the control site and making the communication link redundant.

[0033] In addition, in some embodiments, each first backbone network communication unit is connected as an uplink line, the first motor control unit and the first converter control unit are located on the uplink line, and the second backbone network communication unit is connected as a downlink line, and the second motor control unit and the second converter control unit are located on the downlink line.

[0034] In one embodiment, each of the control stations includes two of the first motor control units and three of the first converter control units.

[0035] In one embodiment, each of the control stations includes two of the second motor control units and three of the second converter control units.

[0036] In one embodiment, the backbone network communication unit further includes an optical transport network device.

[0037] In this embodiment, the optical transport network device is an OTN device. By using the optical transport network device as a backbone network communication unit, the communication efficiency can be effectively improved and the communication can be stabilized.

[0038] In one embodiment, each motor control unit and each converter control unit of each control site are connected to the backbone network communication unit of the same control site via Ethernet.

[0039] In this embodiment, the motor control unit and the converter control unit respectively have an Ethernet port, and the backbone network communication unit has an Ethernet port. The motor control unit and the converter control unit are connected to the backbone network communication unit via Ethernet, so that the motor control unit and the converter control unit can access the Ethernet and the backbone network communication unit based on the IP address, making communication more convenient and efficient.

[0040] In one embodiment, the connection architecture of the backbone network communication units of each control site is a ring network. Figure 3 , the backbone network communication units are connected in sequence to form a ring network.

[0041] In one embodiment, at least one of the control sites further comprises a clock unit, and the clock unit is connected to the backbone network communication unit of the same control site.

[0042] In this embodiment, the clock unit includes a GPS (Global Positioning System) subunit, which is used to obtain network reference time and provide clock signals for each control site. Through the clock unit, the traction control system can obtain network reference time and realize GPS clock timing for the entire network.

[0043] In one embodiment, three adjacent control sites are provided with a clock unit, and the clock unit is used to provide a clock signal for the three adjacent control sites.

[0044] In this embodiment, the clock unit provides clock signals for three adjacent control sites, thereby realizing a nested ring network of three substations.

[0045] Embodiment 2

[0046] In this embodiment, Figure 3As shown in the figure, the traction control system includes a motor control unit (hereinafter referred to as "MCU"), a converter control unit (hereinafter referred to as "CCU"), a backbone network communication device (hereinafter referred to as "PTN") and a clock device (hereinafter referred to as "GPS"). The MCU and CCU are connected to the PTN network through the Ethernet interface. Through the planning of the PTN network, the equipment of the two substations can communicate with each other in the minimum range, the GPS clock timing of the whole network can be realized, and the nested ring network of the three substations can be realized.

[0047] MCU and CCU realize real-time high-speed Ethernet communication through dedicated communication plug-ins to solve the delay and jitter when sending and receiving data. Each substation is equipped with 1~2 sets of PTN equipment to achieve redundancy of site communication equipment and redundant design of links.

[0048] 1) Through the PTN network, communication control between MCU and CCU in multiple partitions can be realized;

[0049] 2) Through the PTN network, point-to-point high-speed communication in a certain partition can be achieved, with a delay of less than 500 microseconds and a jitter of 50 microseconds;

[0050] 3) Through the PTN network, multiple communication redundancy modes such as link redundancy and ring network redundancy can be realized;

[0051] 4) Through the PTN network, the complexity of external communication wiring between MCU and CCU is simplified;

[0052] 5) Through the PTN network, the requirement of high-speed maglev trunk line greater than 1,000 km can be met, and the networking needs of no less than 20 substations can be met.

[0053] 6) Through the PTN network, the PTP (Precision Time Protocol) clock synchronization and timing of the entire network is realized.

[0054] Embodiment 3

[0055] In this embodiment, a rail transit system is provided, including the traction control system described in any of the above embodiments.

[0056] In this embodiment, each control site communicates by using a packet transmission network device as the backbone network communication unit of the communication device, so that control sites that are far away can communicate and achieve long-distance communication control. It can match the current development of Ethernet technology and the trend of IP-based control equipment, and effectively simplifies the wiring complexity of the motor control units and converter control units of different control sites.

[0057] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A traction control system, characterized in that: include: A plurality of control sites, each of which comprises at least one motor control unit, at least one converter control unit and a backbone network communication unit; Each motor control unit and each converter control unit of each control site is connected to the backbone network communication unit of the same control site, and the backbone network communication units of each control site are communicatively connected, wherein the backbone network communication unit includes a packet transmission network device; The motor control unit includes a first motor control unit and a second motor control unit, the converter control unit includes a first converter control unit and a second converter control unit, and the backbone network communication unit includes a first backbone network communication unit and a second backbone network communication unit; Each of the control sites includes at least one of the first motor control unit, at least one of the second motor control unit, at least one of the first converter control unit, at least one of the second converter control unit, one of the first backbone network communication unit and one of the second backbone network communication unit; Each of the first motor control units and each of the first converter control units of each of the control sites is connected to the first backbone network communication unit of the same control site; Each of the second motor control units and each of the second converter control units of each of the control sites is connected to the second backbone network communication unit of the same control site; The first backbone network communication unit and the second backbone network communication unit of the same control site are connected to each other, the first backbone network communication unit of each control site is communicatively connected, and the second backbone network communication unit of each control site is communicatively connected.

2. The traction control system according to claim 1, characterized in that: Each of the control sites includes two of the first motor control units and three of the first converter control units.

3. The traction control system according to claim 1, characterized in that: Each of the control sites includes two second motor control units and three second converter control units.

4. The traction control system according to claim 1, characterized in that: The backbone network communication unit also includes optical transport network equipment.

5. The traction control system according to claim 1, characterized in that: Each motor control unit and each converter control unit of each control site are connected to the backbone network communication unit of the same control site via Ethernet.

6. The traction control system according to claim 1, characterized in that: The connection architecture of the backbone network communication units of each of the control sites is a ring network.

7. The traction control system according to any one of claims 1 to 6, characterized in that: At least one of the control sites further comprises a clock unit, and the clock unit is connected to the backbone network communication unit of the same control site.

8. The traction control system according to claim 7, characterized in that: A clock unit is provided for three adjacent control sites, and the clock unit is used to provide a clock signal for the three adjacent control sites.

9. A rail transit system, characterized in that: include: A traction control system as claimed in any one of claims 1 to 8.

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