Box-type substation rtu double network interruption automatic restart device

Abstract

The utility model discloses a box -type transformer station RTU double net interrupt automatic restart device, include: ethernet signal acquisition module, restart control circuit and STM32 singlechip, RTU device ontology is connected with ethernet signal acquisition module through switch photoelectric converter, ethernet acquisition module is connected with STM32 singlechip, and STM32 singlechip is connected with restart control circuit, and RTU device power supply is powered for RTU device ontology after restart control circuit, the utility model discloses can guarantee the intelligent monitoring and automatic control function of railway power system continue effectively.

Description

Technical Field

[0001] This utility model relates to the field of intelligent remote control and measurement terminal technology for railway electrical automation, and in particular to an automatic restart device for dual-network interruption of box-type substation RTU. Background Technology

[0002] In recent years, railway construction has developed rapidly, leading to a significant increase in the number of prefabricated substations, all of which operate under unmanned operation. As the core intelligent monitoring equipment of the substation, the railway prefabricated substation RTU (Remote Control Unit) bears the important responsibility of collecting key parameters such as voltage, current, and switch status of high-voltage and low-voltage switchgear, controlling switch operations, and realizing power distribution automation. The stability of its communication channel with the dispatching master station directly affects the operation and maintenance efficiency of the railway power system.

[0003] Currently, RTU devices rely on A / B dual networks (direct output via network cable or fiber optic) to establish communication with the dispatch master station. However, when the dual network channel is interrupted, maintenance personnel need to rush to the site to handle the issue. Since prefabricated substations are mostly located far from urban areas, it takes a long time for personnel to arrive on-site, and in most cases, there is no substantial hardware failure, which can be resolved simply by restarting. More importantly, the existing solution lacks a real-time detection and proactive communication status monitoring mechanism for the RTU dual network channel, and also lacks intuitive restart data recording and display functions. It is impossible to identify channel interruption problems in advance or in a timely manner, and it is also difficult to trace historical fault recovery. This leads to delayed manual intervention and extended troubleshooting time, which not only increases the workload of maintenance personnel but also wastes human resources and indirectly affects the continuity of railway power monitoring. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a prefabricated substation RTU dual-network interruption automatic restart device. This utility model can ensure the continuous effectiveness of the intelligent monitoring and automated control functions of the railway power system.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a box-type substation RTU dual-network interruption automatic restart device, characterized in that it includes: an Ethernet signal acquisition module, a restart control circuit, and an STM32 microcontroller; the RTU device body is connected to the Ethernet signal acquisition module through a switch / optical converter, the Ethernet acquisition module is connected to the STM32 microcontroller, the STM32 microcontroller is connected to the restart control circuit, and the RTU device power supply is supplied to the RTU device body after passing through the restart control circuit.

[0006] As a further improvement of this utility model, the restart control circuit includes an optocoupler, a transistor, and a relay. One of the I / O ports of the STM32 microcontroller is connected to pin 1 of the optocoupler, pin 2 of the optocoupler is grounded, pin 3 of the optocoupler is connected to the base of the transistor, the emitter of the transistor is grounded, the collector of the transistor is connected to pin 4 of the optocoupler and pin 3 of the relay, pin 4 of the relay is connected to pin 4 of the optocoupler, pins 1 and 2 of the relay are connected to one of the sockets, and pins 5 and 6 of the relay are connected to the other two sockets of the socket. The socket is connected to the power supply of the RTU device to power the RTU device body.

[0007] As a further improvement of this utility model, it also includes a power supply module for supplying power to the switch / optoelectronic converter and the restart device.

[0008] As a further improvement of this utility model, the power module includes an external AC220V power supply, which is connected to a power conversion module AC220V-DC24V. The power conversion module AC220V-DC24V is connected to the switch / photoelectric converter and the restart device respectively, and a power conversion module DC24V-DC5V is also connected between the power conversion module AC220V-DC24V and the restart device.

[0009] As a further improvement of this utility model, the Ethernet signal acquisition module has Ethernet port A and Ethernet port B, both of which are connected to the STM32 microcontroller through a W5500 Ethernet module.

[0010] As a further improvement of this utility model, it also includes an HMI touch screen display module connected to the STM32 microcontroller.

[0011] As a further improvement of this utility model, it also includes a light-emitting diode connected to the STM32 microcontroller, which is used to indicate whether the dual-network connection is interrupted.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model enhances the accuracy of channel detection by combining dual W5500 Ethernet modules with preset IP configuration to achieve directional communication and real-time monitoring of the RTU dual-network channels, thus avoiding misjudgment of channel faults.

[0014] 2. Ensure stable communication connection. The power module provides continuous power to the core detection, communication and display modules. With the help of visual diode status indicators and touch screen data display, the dual network communication status can be monitored in real time, reducing the escalation of faults caused by untimely monitoring.

[0015] 3. Achieve visualized management of restart data: The addition of the 3.5-inch serial port capacitive touch screen HMI32480DN035 can record and display the total number of restarts, the trigger time of a single restart, and the recovery time in real time. Maintenance personnel can obtain historical fault data on-site without background queries, improving the efficiency of fault tracing and cause analysis.

[0016] 4. Reduce manual intervention costs: By establishing a stable channel communication and real-time detection mechanism in advance, most channel interruption problems that can be automatically identified and handled can be resolved by "reconnecting to the network after recovery". Combined with the on-site data query function of the touch screen, maintenance personnel can avoid traveling to the site due to non-hardware faults, thus reducing labor costs.

[0017] 5. Indirectly ensuring railway traffic safety: By continuously monitoring the status of the RTU dual-network channels, quickly restoring communication, and completely recording fault data, the system ensures that the RTU device can normally collect and upload parameters such as substation voltage and current, maintain the automated monitoring of the railway power system, and provide support for railway traffic safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0019] Figure 2 This is a circuit diagram of the restart control circuit in an embodiment of this utility model. Detailed Implementation

[0020] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] Example

[0022] like Figure 1 As shown, a prefabricated substation RTU dual-network interruption automatic restart device includes: an Ethernet signal acquisition module, a restart control circuit, and an STM32 microcontroller; the RTU device body is connected to the Ethernet signal acquisition module through a switch / optical converter, the Ethernet acquisition module is connected to the STM32 microcontroller, the STM32 microcontroller is connected to the restart control circuit, and the RTU device power supply is supplied to the RTU device body after passing through the restart control circuit.

[0023] The core of this embodiment consists of an Ethernet signal acquisition module, a restart control circuit, an STM32 microcontroller, an HMI touchscreen display module, and a power supply module. These modules work collaboratively around the core functions of "channel detection" and "communication establishment," as detailed below:

[0024] The Ethernet signal input module (core detection and communication module) is the core component for realizing the detection and communication connection of the RTU's dual-network channels. It integrates two W5500 Ethernet network modules, corresponding to the A and B network channels of the RTU device respectively. Before use, the IP address, gateway, and subnet mask of the prefabricated substation are pre-configured in the STM32 microcontroller, enabling the Ethernet signal input module to accurately establish directional communication connections with the RTU device's dual-network channels. To visually demonstrate the communication status, the module also connects four LEDs: when the module and RTU device establish normal dual-network communication and data transmission is stable, the LEDs flash normally at a preset frequency; if communication is interrupted or the data flow is abnormal, the LEDs immediately turn off, achieving visual monitoring of the channel status.

[0025] The STM32 microcontroller primarily performs three functions: First, it uses a pre-programmed IP address, subnet mask, and gateway to ping the device's channels via an Ethernet signal acquisition module. When both channels fail to ping, a channel interruption is determined. Second, it records real-time restart-related data for the RTU device, including the total number of restarts, the trigger time (channel interruption determination time) and recovery time (communication re-establishment time) for each restart, and synchronously transmits this data to the HMI touchscreen display module. Third, it connects two status indicator LEDs. When a dual-network channel interruption is detected, the LEDs illuminate to quickly indicate the fault type. If a channel abnormality is determined, the module will trigger subsequent recovery instructions to ensure timely fault handling.

[0026] The HMI touchscreen display module (reboot data visualization module) uses a 3.5-inch serial port capacitive touchscreen HMI32480DN035. It establishes a data connection with the STM32 microcontroller via serial port. Its core function is to display real-time reboot-related data for the RTU device. Specific display content includes:

[0027] Total Reboot Count: Real-time accumulation and display of the total number of RTU reboots during device operation, intuitively reflecting the frequency of channel interruption faults; Single Reboot Details: Records the trigger time (accurate to year / month / day hour:minute:second) and recovery time of each reboot in chronological order, facilitating maintenance personnel to trace the processing time and interval of each fault; Supports touch operation query function, allowing users to switch data display interfaces via touchscreen and quickly retrieve historical reboot records, enabling on-site acquisition of fault data without additional equipment connection, improving operation and maintenance convenience.

[0028] The power supply module (basic support for communication, detection, and display) is responsible for converting external power into a stable operating power supply for the Ethernet signal input module, STM32 microcontroller, HMI touch screen display module, and restart control circuit. This ensures that there is no risk of power failure for each core module during channel detection, communication connection, and data display, and provides power support for the continuity of dual-network status monitoring and the integrity of restart data recording.

[0029] like Figure 2 As shown, the restart control circuit works as follows: When the STM32 microcontroller determines that the dual-network channel is interrupted and needs to be triggered for recovery, it sends a high-level signal through pin PB10, which passes through R54 and R36 to pin 1 of optocoupler U8. After processing by the optocoupler, the signal exits from pin 3 of the optocoupler, passes through R35, and is connected to transistor Q2. The collector of the transistor is connected to diode U10, the cathode of the diode is connected to pin 4 of relay K1, and the anode is connected to pin 3 of K1. In this way, the microcontroller sends a high-level signal, which, through the restart circuit control section, drives relay K1 to operate. This interrupts the power supply to the RTU device connected to relay K1 through socket U14. After 30 seconds of interruption, the microcontroller sends a low-level signal through PB10 to the control circuit section to restore the relay state and restore the power supply to the RTI, thus achieving the purpose of mechanically restarting the RTU device. After the power supply to the RTU device is restored, a "recovery successful" signal is fed back to the microcontroller module, which updates the restart data and synchronizes it to the touch screen, ensuring that the device quickly re-establishes communication connection with the dual networks.

[0030] The principle of this embodiment will be further explained below:

[0031] The initial communication configuration and connection establishment: The normally operating RTU device in the prefabricated substation has two data transmission channels, A and B (usually directly output via network cable or fiber optic cable, used to establish communication with the dispatch master station). First, connect the RTU's A and B network channels to the Ethernet signal input module via a switch or opto-converter (the RTU device itself has two types of channels: one is network cable transmission, so a switch is needed; the other is fiber optic transmission, so an opto-converter is needed to convert the fiber optic to network cable input to the Ethernet port to restart the device for data acquisition). Then, input the corresponding IP address, gateway, and subnet mask of the prefabricated substation into the STM32 microcontroller, and simultaneously complete the initialization settings for the HMI touchscreen display module (such as time calibration and display parameter configuration). After configuration, the STM32 chip performs a long PING to the RTU device's dual network channels through the Ethernet signal acquisition module, and the touchscreen simultaneously enters the data display interface, initially displaying "0" for the total number of restarts.

[0032] After the dual-network channel real-time detection and data recording device is started, the STM32 chip continuously monitors the communication status of the A / B dual networks: if both networks can be pinged normally, the channel is considered normal, the four LEDs on the module continue to flash, and the touch screen displays "Current communication is normal" and the total number of restarts in real time; if no normal feedback is detected when pinging the dual networks, the channel is considered interrupted: the module LEDs turn off, the fault signal is transmitted to the STM32 microcontroller, the two indicator LEDs of the microcontroller module light up, and the current time is recorded as the "restart trigger time". The total number of restarts is incremented by 1, and the updated total number of restarts and trigger time are synchronized to the touch screen display.

[0033] Recovery and Data Update After Channel Interruption: When the STM32 microcontroller receives a channel interruption signal, it triggers the restart control circuit to execute the recovery action of the RTU device (such as power failure restart). After the RTU restarts and resumes communication with the dual network, the Ethernet signal input module detects that the communication is normal and immediately transmits the "recovery signal" to the microcontroller module. The microcontroller records the current time as the "recovery time" and synchronizes the recovery time to the touch screen to complete the full display of the single restart data (trigger time + recovery time).

[0034] In case the Ethernet signal input module still fails to detect communication recovery after the recovery action is executed, the device will repeat the recovery action until the preset maximum number of times is reached and then stop. At this time, the touch screen will indicate "Maximum number of restarts reached, manual intervention required". If the dispatch master station still does not detect RTU communication, maintenance personnel can directly query historical restart records (trigger time, recovery time, number of failures) through the touch screen after arriving at the site, quickly locate the cause of the fault and reduce the time spent on troubleshooting.

[0035] The core of this embodiment lies in the STM32 chip achieving real-time detection and stable communication connection of the RTU's dual network channels through the W5500 chip. It is paired with a 3.5-inch serial port capacitive touchscreen HMI32480DN035 to visualize the restart data. When the STM32 continuously pings the RTU's dual channels and neither is conducting, the STM32 chip sends a high-level signal to the optocoupler. The optocoupler transmits the signal to the transistor, which amplifies the chip pin level signal to drive relay K1, indirectly controlling the intermediate relay to achieve the purpose of automatically restarting the RTU device.

[0036] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An automatic restart device for RTU dual-network interruption in a prefabricated substation, characterized in that, include: The device includes an Ethernet signal acquisition module, a restart control circuit, and an STM32 microcontroller. The RTU device itself is connected to the Ethernet signal acquisition module via a switch / optical converter. The Ethernet acquisition module is connected to the STM32 microcontroller, and the STM32 microcontroller is connected to the restart control circuit. The RTU device power supply is provided to the RTU device itself after passing through the restart control circuit.

2. The automatic restart device for dual-network interruption of prefabricated substation RTU according to claim 1, characterized in that, The restart control circuit includes an optocoupler, a transistor, and a relay. One of the I / O ports of the STM32 microcontroller is connected to pin 1 of the optocoupler. Pin 2 of the optocoupler is grounded. Pin 3 of the optocoupler is connected to the base of the transistor. The emitter of the transistor is grounded. The collector of the transistor is connected to pin 4 of the optocoupler and pin 3 of the relay. Pin 4 of the relay is connected to pin 4 of the optocoupler. Pins 1 and 2 of the relay are connected to one of the sockets. Pins 5 and 6 of the relay are connected to the other two sockets of the socket. The socket is connected to the power supply of the RTU device to power the RTU device itself.

3. The automatic restart device for dual-network interruption of prefabricated substation RTU according to claim 1, characterized in that, It also includes a power module for supplying power to the switch / opto-electric converter and the restart device.

4. The automatic restart device for dual-network interruption of prefabricated substation RTU according to claim 3, characterized in that, The power module includes an external AC220V power supply, which is connected to a power conversion module AC220V-DC24V. The power conversion module AC220V-DC24V is connected to the switch, optoelectronic converter, and restart device, respectively. A power conversion module DC24V-DC5V is also connected between the power conversion module AC220V-DC24V and the restart device.

5. The automatic restart device for RTU dual-network interruption in a prefabricated substation according to claim 1, characterized in that, The Ethernet signal acquisition module has Ethernet port A and Ethernet port B, both of which are connected to the STM32 microcontroller via a W5500 Ethernet module.

6. The automatic restart device for dual-network interruption of prefabricated substation RTU according to claim 1, characterized in that, It also includes an HMI touchscreen display module connected to the STM32 microcontroller.

7. The automatic restart device for dual-network interruption of prefabricated substation RTU according to claim 1, characterized in that, It also includes an LED connected to the STM32 microcontroller, which is used to indicate whether the dual-network connection is interrupted.

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