A dual emergency control system for switch cabinets in unattended substations

Abstract

A dual emergency control system for switch cabinets in an unmanned substation has a mechanical opening and closing mechanism and a control subsystem. An independent power panel is installed in the remote controlled station of the substation; two communication channels are configured between the controlled station and the remote control station, and the control subsystem includes a server, a drive unit, a mechanical opening and closing mechanism control module, a switch, a sub-switch cabinet motor and a tripping magnetic valve control circuit. The server realizes information exchange with the control station through the switch through two communication channels; the power panel, the drive unit, the sub-switch cabinet motor and the tripping magnetic valve control circuit, the switch cabinet control motor and the contactor signal input terminal, the mechanical opening and closing mechanism control module signal, and the mechanical opening and closing mechanism are electrically connected. The present invention is provided with a dual control means, the first control circuit is simple and reliable, and the second does not rely on any circuit, which can ensure that the operation behavior is executed. The present invention effectively ensures the safe power supply of electrified railways.

Description

Technical Field

[0001] The invention relates to the technical field of traction power supply supporting equipment for electrified railways, in particular to a dual emergency control system for a switch cabinet of an unmanned substation. Background Art

[0002] The electrified railway traction substation is an important node in the operation of electrified railways. In recent years, with the development of my country's railways, the density of electrified railway traffic has increased. Due to lightning strikes and other reasons, the power supply of the electrified railway traction substation is often interrupted due to abnormalities in the substation automation system and equipment failure. Since power outages will affect the transportation order and have a great social impact, it is very meaningful to quickly restore power supply when there is no one on duty. In the prior art, the power supply control of the electrified railway traction substation is generally manually controlled on site. Therefore, when a power outage occurs, when the on-duty personnel are not on duty on site for various reasons, or are not aware of the power outage in time, the power supply cannot be restored in time, which will affect the safe operation of the electrified railway.

[0003] Although in the prior art, the power supply data of the on-site electrified railway traction substation is transmitted to the remote control station through the railway dedicated communication channel. After receiving the on-site power outage data, the control station controls the power switch mechanism of the on-site switch cabinet of the electrified railway traction substation to complete the closing or opening. However, since there is only one dedicated channel and the data is transmitted in a wired manner, when there is a power outage on site, the power supply to the channel is out of power, or the channel transmits data abnormally due to abnormal equipment operation, the remote control station will not be able to receive data and transmit control data normally, and will not be able to complete actions such as closing or opening, which restricts the safe operation of the electrified railway. In addition, the switch cabinet itself only has one set of closing and opening equipment, and the power supply depends on the power supply in the substation. Therefore, when the power supply in the substation is out of power or abnormal, it will also cause the circuit breaker (power switch mechanism) of the switch cabinet to be unable to be remotely controlled to close and open. Summary of the invention

[0004] In order to overcome the drawback that the control equipment and control method adopted in the power supply equipment in the existing electrified railway traction substation cannot effectively ensure the closing or opening operation of the on-site substation switch cabinet power switch after a power outage, the present invention provides an opening and closing control system for use in combination with the existing substation switch cabinet, which has an independent power supply subsystem, a control subsystem and a dual-channel data transmission channel, can effectively ensure the transmission of on-site power supply data and remote control data, and can effectively close or open the switch cabinet opening and closing switch through the control subsystem when the power is off on site, and in the case of switch cabinet motor failure, etc., the opening and closing switch action of the switch cabinet body can also be operated by a mechanical opening and closing mechanism, thereby achieving multiple insurance effects, effectively ensuring that the electrified railway traction substation provides safe power supply for the electrified railway, and is a dual emergency control system for the switch cabinet of an unmanned substation.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A dual emergency control system for switch cabinets in an unmanned substation, including the original opening and closing control system in an electrified railway traction substation, characterized in that it also has a mechanical opening and closing mechanism and a control subsystem. An independent power supply panel is installed in the remote controlled station of the substation, and surge protection electrical equipment is installed at the inlet and outlet ends of the power supply panel; two communication channels are configured between the controlled station and the remote control station, one main channel using the existing railway communication network, and the other backup channel, which forwards the communication between the controlled station and the control station equipment through a cloud server, and the communication encryption algorithm uses a private symmetric encryption algorithm, and each controlled station is configured with an independent key; the control subsystem includes a server, a drive unit , mechanical opening and closing mechanism control module, switch, sub-switch cabinet motor and tripping magnetic valve control circuit; the power input terminal of the power supply panel is electrically connected to the AC power supply in the substation, the power output terminal of the power supply panel is electrically connected to the power input terminal of the control subsystem, and the server realizes information exchange with the control station through two communication channels via the switch; the signal output terminal of the drive unit is electrically connected to the signal input terminal of the sub-switch cabinet motor and the tripping magnetic valve control circuit, and the signal output terminal of the sub-switch cabinet motor and the tripping magnetic valve control circuit is electrically connected to the switch cabinet control motor and contactor signal input terminal respectively; the signal output terminal of the mechanical opening and closing mechanism control module is electrically connected to the signal input terminal of the mechanical opening and closing mechanism.

[0007] Furthermore, a pair of normally closed control nodes of the branch switch cabinet motor and tripping magnetic valve control circuit are electrically connected in series between the circuit breaker motor and tripping magnetic valve control circuit of the switch cabinet and the switch cabinet motor and contactor signal input terminal.

[0008] Furthermore, the control station is equipped with a programmable control card, and serialized control tasks in multiple controlled stations are completed by selecting the programmable control card.

[0009] Furthermore, the mechanical opening and closing mechanism includes a guide rail, a translation box, a vertical movement box, a dual-view camera, a dual-joint movable arm, an electric rocker, a controller, and a laser radar positioning module, wherein the guide rail is horizontally installed on the front upper part of the switch cabinet, the translation box is installed on the guide rail, and can move horizontally forward and backward along the guide rail, a pillar is installed at the lower end of the translation box, the vertical movement box is installed in front of the pillar, and can move vertically and rotate along the pillar, the dual-view camera, the dual-joint movable arm, and the laser radar positioning module are installed in front of the vertical movement box, the electric rocker is installed at the front end of the dual-joint movable arm, and the controller is installed in the translation box. After the dual-view camera inputs the QR code information of the front end of the switch cabinet and the laser radar positioning module inputs the position information of the front end of the switch cabinet to the controller, the controller can realize the laser radar positioning and QR code positioning functions, the controller and the translation box, the vertical movement box, the dual-joint movable arm, and the power input end of the electric rocker are electrically connected respectively, and the signal output end of the dual-view camera and the laser radar positioning module is connected to the signal input end of the controller.

[0010] Furthermore, the power input end of the mechanical opening and closing mechanism is powered by a power supply panel and can also be installed on a mobile vehicle and powered by an independent power supply.

[0011] The beneficial effects of the present invention are as follows: the present invention adopts a separate power supply panel for power supply, does not rely on the power supply and communication channel of the existing monitoring system in the substation, does not rely on the control cable of the existing monitoring system, is independent of the existing monitoring system, and will not affect the mechanical opening and closing mechanism and control subsystem of the present invention when the existing monitoring system is damaged. The present invention is provided with dual control means, the first control circuit, the sub-switch cabinet motor and the tripping magnetic valve control circuit can realize the fast switching operation of the circuit breaker of the switch cabinet, and the designed circuit is simple and reliable. The second mechanical opening and closing mechanism controls the switching operation of the circuit breaker of the switch cabinet without relying on any circuit, which can ensure that the operation behavior is executed. The present invention has dual communication channels, the first main channel uses the communication network of the existing railway communication system to ensure the real-time nature of the communication data, the second backup channel uses wireless communication, and is only enabled when the first main channel cannot work normally, and the backup wireless channel uses private symmetric encryption technology to ensure the security of communication. The present invention effectively ensures that the electrified railway traction substation supplies power to the electrified railway safely. Based on the above, the present invention has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the architecture of the present invention.

[0014] Figure 2 It is a structural schematic diagram of the mechanical opening and closing mechanism of the present invention.

[0015] Figure 3 The flowchart of the present invention is shown in FIG. DETAILED DESCRIPTION

[0016] Figure 1 , 3 As shown in the figure, a dual emergency control system for switch cabinets in an unmanned substation includes the original opening and closing control system in the electrified railway traction substation (the power output end of the control system and the signal input end of the switch cabinet control motor and contactor are respectively connected by wires), and also has a mechanical opening and closing mechanism and a control subsystem. An independent power supply panel is installed in the remote controlled station of the substation, and surge protection electrical equipment is installed at the inlet and outlet ends of the power supply panel (to protect the power supply panel). Two communication channels are configured between the controlled station and the remote control station, one main channel, which uses the existing communication network of the railway, and the other backup channel. The communication between the controlled station and the control station equipment is forwarded through the cloud server. The communication encryption algorithm uses a private symmetric encryption algorithm. Each controlled station is configured with an independent key; the control subsystem includes a server, a drive unit, a mechanical opening and closing mechanism control module, a switch, a sub-switch cabinet motor and a tripping magnetic valve control circuit; the power input end of the power supply panel is connected to the AC power supply in the substation via a wire, the power output end of the power supply panel is connected to the power input end of the control subsystem via a wire, and the server realizes information exchange with the control station through two communication channels via the switch; the signal output end of the drive unit and the signal input end of the sub-switch cabinet motor and the tripping magnetic valve control circuit are connected via a wire, and the signal output end of the sub-switch cabinet motor and the tripping magnetic valve control circuit are connected to the switch cabinet control motor and contactor signal input end respectively via a wire; the signal output end of the mechanical opening and closing mechanism control module and the signal input end of the mechanical opening and closing mechanism are connected via a wire.

[0017] Figure 1 , 2As shown in Figure 3, a pair of normally closed control nodes of the switch cabinet motor and release magnetic valve control circuit are connected in series between the circuit breaker motor and release magnetic valve control circuit of the switch cabinet and the switch cabinet motor and contactor signal input terminal through wires. The control station is equipped with a programmable card, and the serialized control tasks in multiple controlled stations (substations) are completed by selecting the programmable card. The mechanical opening and closing mechanism includes a guide rail 1, a translation box 2, a vertical movement box 3, a dual-view camera 4, a dual-joint movable arm 5, an electric rocker 6, a controller 7, and a laser radar positioning module 8. The guide rail 1 is horizontally installed on the upper front part of the switch cabinet, the translation box 2 is installed on the guide rail, and can move horizontally forward and backward along the guide rail 1, the lower end of the translation box 2 is installed with a pillar 10, the vertical movement box 3 is installed in front of the pillar 10, and can move vertically and rotate along the pillar 10, the dual-view camera 4, the dual-joint movable arm 5, and the laser radar positioning module 8 are installed in the vertical movement box 3 Before, the electric rocker 6 is installed at the front end of the double-joint movable arm 5, the controller 7 is installed in the translation box 2, the dual-view camera inputs the QR code information at the front end of the switch cabinet, and the laser radar positioning module 8 inputs the position information of the front end of the switch cabinet to the controller 7. The controller 7 can realize the laser radar positioning and QR code positioning functions. The power input ends of the controller 7 and the translation box 2, the vertical box 3, the double-joint movable arm 5, and the electric rocker 6 are respectively connected by wires, and the dual-view camera 4, the laser radar positioning module 8 signal output end and the controller 7 signal input end are respectively connected by wires. The power input end of the mechanical opening and closing mechanism is powered by the power screen, and can also be installed on a mobile trolley and powered by an independent power supply.

[0018] Figure 1 , 3 As shown, during the installation of the present invention, the focus of work is on the deployment and implementation of the controlled station. The implementation of the controlled station is divided into the installation of the power panel, the installation of the mechanical opening and closing mechanism, the secondary wiring, and the debugging of all systems in the station. The preset position of the mechanical opening and closing mechanism is configured in the controller of the mechanical opening and closing mechanism during debugging, and the configured point and description are reported to the control subsystem in the station through the Web Service. The controlled station server executes the command of the control station. If the mechanical opening and closing mechanism needs to be involved, the mechanical opening and closing mechanism is first controlled to a specific preset point through the controller of the mechanical opening and closing mechanism and the mechanical opening and closing mechanism control module, and then the corresponding operation is performed. After the operation is successful, the data are written into the controller and the mechanical opening and closing mechanism control module, and automatic control can be completed later.

[0019] Figure 1 , 3As shown, one drive unit of the present invention can drive eight switch cabinets supporting sub-switch cabinet motors and tripping magnetic valve control circuits, that is, it can control the circuit breaker opening and closing actions of 8 switch cabinets in the controlled station (and the number of drive units can be increased). In the present invention, the power supply panel is usually charged by the power supply in the substation. After the substation trips and loses power due to various reasons, it can automatically and separately supply power to the power input end of the control subsystem and the mechanical opening and closing mechanism, ensuring that the two can work normally after the substation is out of power (the power supply panel can complete at least two switching operations and the standby time requirement of more than 2 hours). The main channel of the present invention is the railway dedicated network of the substation. Between the control station and the server, an application layer heartbeat message is designed. In actual application, when the heartbeat message is abnormal, it is judged that the communication connection is interrupted, and it is considered that the main channel is abnormal. When the communication connection between the control station and the server is interrupted, the control subsystem automatically switches the channel, and the controlled station and the control station are changed to the standby channel to connect to the remote cloud server, and information interaction is realized. The control station encrypts the command content and forwards it to the cloud server, which is forwarded by the cloud server to the server in the substation. The server in the substation decrypts the command content, executes the command when it determines that the received content is legal, and returns the execution process data, results, etc. to the remote control station through the cloud server. In specific applications, wireless communication data includes the unique number, content and check code of the control station and the controlled station. The data is symmetrically encrypted and transmitted in ciphertext; after receiving the data, the controlled station and the control station decrypt and judge the check code and station number. The data is executed only when the check is correct. The wireless communication data key is manually replaced after each use several times to ensure the security of communication. When the switch cabinet of the substation trips due to lightning strikes, channel abnormalities, comprehensive self-abnormalities, etc., the remote control station can remotely issue control instructions after receiving the information, and then the signal output end of the drive unit outputs the command signal to the control circuit of the sub-switch cabinet motor and the tripping magnetic valve. The signal output end of the sub-switch cabinet motor and the tripping magnetic valve control circuit outputs the control signal into the control motor and contactor signal input end of the switch cabinet, and then the circuit breaker of the switch cabinet produces a closing or opening action (for example, when a major fault occurs, the control station needs to remotely control the circuit breaker to open).

[0020] Figure 1 , 2As shown in Figure 3, after the switch cabinet motor, contactor and other faults occur (the switch cabinet itself cannot be opened and closed), the control station can control the mechanical opening and closing mechanism to work through the mechanical opening and closing mechanism control module to realize the opening and closing operation of the circuit breaker of the switch cabinet. When the mechanical opening and closing mechanism is working, the controller 7 controls the translation box 2 to move horizontally forward and backward along the guide rail 1, and the vertical movement box 3 to move vertically and rotate along the support 10, so that the dual-view camera 4 and the laser radar positioning module 8 are close to the circuit breaker operation hole in front of the switch cabinet. After the dual-view camera 4 inputs the two-dimensional code information of the front end of the switch cabinet, and the laser radar positioning module 8 inputs and the position information of the front end of the switch cabinet to the controller 7, the controller 7 can realize the laser radar positioning and two-dimensional code positioning functions, and then control the electric rocker 6 to insert into the circuit breaker operation hole, and the controller 7 fine-adjusts the position of the translation box 2 and the vertical movement box 3, so that the front end of the electric rocker is accurately positioned to the operation hole and inserted. The controller 7 controls the electric rocker to rotate the rocker clockwise or counterclockwise according to the set program. When the specified number of turns and torque are reached, the opening and closing operations of the switch of the circuit breaker are completed.

[0021] Figure 1 , 2 As shown in Figure 3, the present invention adopts a separate power supply panel for power supply, which is independent of the power supply and communication channel of the existing monitoring system in the substation, and is also independent of the control cable of the existing monitoring system. It is independent of the existing monitoring system, and when the existing monitoring system is damaged, it will not affect the mechanical opening and closing mechanism and control subsystem of the present invention. The present invention is provided with dual control means. The first control circuit is divided into the switch cabinet motor and the tripping magnetic valve control circuit, which can realize the rapid switching operation of the circuit breaker of the switch cabinet. The designed circuit is simple and reliable. The second mechanical opening and closing mechanism controls the switching operation of the circuit breaker of the switch cabinet without relying on any circuit, which can ensure that the operation behavior is executed. The present invention has dual communication channels. The first main channel uses the communication network of the existing railway communication system to ensure the real-time nature of the communication data. The second backup channel adopts the wireless communication mode and is only enabled when the first main channel cannot work normally. The backup wireless channel uses private symmetric encryption technology to ensure the security of communication. The present invention effectively ensures that the electrified railway traction substation provides safe power supply for the electrified railway.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0023] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dual emergency control system for switch cabinets in unattended substations, including the original opening and closing control system in electrified railway traction substations, characterized in that It also has a mechanical opening and closing mechanism and a control subsystem. An independent power panel is installed in the remote controlled station of the substation, and surge protection electrical equipment is installed at the inlet and outlet ends of the power panel. Two communication channels are configured between the controlled station and the remote control station, one is a main channel, which uses the existing railway communication network, and the other is a backup channel. The communication between the controlled station and the control station equipment is forwarded through the cloud server. The communication encryption algorithm uses a private symmetric encryption algorithm, and each controlled station is configured with an independent key. The control subsystem includes a server, a drive unit, a mechanical opening and closing mechanism control module, a switch, a sub-switch cabinet motor and a tripping magnetic valve control circuit; the power input of the power panel The input end is electrically connected to the AC power supply in the substation, the power output end of the power panel is electrically connected to the power input end of the control subsystem, and the server realizes information exchange with the control station through two communication channels via the switch; the signal output end of the drive unit is electrically connected to the signal input end of the sub-switch cabinet motor and the tripping magnetic valve control circuit, and the signal output end of the sub-switch cabinet motor and the tripping magnetic valve control circuit is electrically connected to the switch cabinet control motor and contactor signal input end respectively; the signal output end of the mechanical opening and closing mechanism control module is electrically connected to the signal input end of the mechanical opening and closing mechanism; a pair of normally closed control nodes of the sub-switch cabinet motor and the tripping magnetic valve control circuit are electrically connected in series with the switch The circuit breaker motor and tripping magnetic valve control circuit of the cabinet are connected with the switch cabinet motor and contactor signal input terminal; the control station is equipped with a programmable card, and the serialized control tasks in multiple controlled stations are completed by selecting the programmable card; the mechanical opening and closing mechanism includes a guide rail, a translation box, a vertical movement box, a dual-view camera, a dual-joint movable arm, an electric rocker, a controller, and a laser radar positioning module, wherein the guide rail is horizontally installed on the upper front part of the switch cabinet, the translation box is installed on the guide rail, and can move horizontally forward and backward along the guide rail, a pillar is installed at the lower end of the translation box, and the vertical movement box is installed in front of the pillar, and can move vertically and rotate along the pillar, a dual-view camera, a dual-joint movable arm, The laser radar positioning module is installed in front of the vertical moving box, the electric rocker is installed at the front end of the double-joint movable arm, the controller is installed in the translation box, the dual-view camera inputs the QR code information of the front end of the switch cabinet, and after the laser radar positioning module inputs the position information of the front end of the switch cabinet to the controller, the controller can realize the laser radar positioning and QR code positioning functions. The power input ends of the controller and the translation box, vertical moving box, double-joint movable arm, and electric rocker are electrically connected respectively, and the signal output ends of the dual-view camera and laser radar positioning module are connected to the signal input end of the controller; the power input end of the mechanical opening and closing mechanism is powered by the power panel, and can also be installed on a mobile cart and powered by an independent power supply.

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