Intelligent detection circuit and restart system for FTU terminal disconnection in power distribution automation circuit breakers

Abstract

This invention relates to the field of detection and restart technology, specifically to an intelligent detection circuit and restart system for FTU (Flight Unit) terminals in power distribution automation systems. The system includes a detection and control unit, comprising a processing and control module; and a network connection unit connected to both the FTU terminal's network cable and the processing and control module. The network connection unit includes a PHY connection circuit and a network interface circuit. The PHY connection circuit is connected to the processing chip of the processing and control module, and is also connected to the FTU terminal's network cable via the network interface circuit. The processing chip is connected to the PHY connection circuit via an RMII interface. Through the cooperation between the detection and control unit and the network connection unit, real-time monitoring of the FTU's operational status can be achieved, thus preventing the failure to promptly detect and respond to FTU disconnections, which could affect the operation of the FTU.

Description

Technical Field

[0001] This invention relates to the field of detection and restart technology, and in particular to an intelligent detection circuit for the disconnection of the FTU terminal of a power distribution automation circuit breaker and an intelligent restart system for the FTU terminal of a power distribution automation circuit breaker. Background Technology

[0002] During the maintenance of distribution automation FTU terminals, equipment often crashes due to external interference or prolonged operation, resulting in line outages. Up to 80% of these FTU terminal outages require on-site restarts to restore network connectivity. Distribution automation switches experienced over 500 outages, with over 400 requiring on-site restarts due to system issues, significantly increasing the workload and difficulty of switch maintenance. Furthermore, some locations are geographically challenging, with switch locations located far away and in difficult terrain, resulting in long travel times (up to 7 hours by car for restarting some mountain switches). The winding, rugged roads pose high driving risks, and the maintenance efficiency of terminals restarted in remote areas is extremely low. This is especially problematic during snowy seasons when roads at high altitudes are icy, making it difficult for maintenance personnel to access the system. The inability to reach the site reduces power supply reliability to some extent and affects the customer's power experience (when equipment is offline, remote control cannot be performed and the action signal after protection action cannot be transmitted back to the main station, which is not conducive to fault analysis and rapid power restoration). However, the current maintenance and testing team is relatively streamlined, the number of distribution automation equipment is increasing day by day, and the maintenance of distribution automation FTU terminals is difficult. The restarting of offline terminals greatly increases the difficulty of operation and maintenance, reduces the practicality of distribution automation switches, and prolongs the rapid power restoration time, making it difficult to guarantee power supply reliability and customer service quality. There are also issues such as the inability of FTU distribution automation terminals to transmit status in real time via the network, and the inability to provide technical feedback after offline, which affects the FTU distribution automation terminals. In addition, there are issues such as the need for on-site restart after offline, which cannot be restarted automatically, and the restarting process is time-consuming and labor-intensive. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the existing technical problem that the FTU power distribution automation terminal cannot transmit the status in real time, resulting in the inability to detect and provide timely feedback after a disconnection, this invention is proposed.

[0005] The purpose of this invention is to provide an intelligent detection circuit for the disconnection of the FTU terminal in a power distribution automation circuit breaker.

[0006] To solve the above technical problems, the present invention provides the following technical solution: an intelligent detection circuit for the disconnection of the FTU terminal of a power distribution automation circuit breaker, which includes a detection control unit and a processing control module;

[0007] The network connection unit is connected to the network cable of the FTU terminal and the processing control module, respectively.

[0008] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, the network connection unit includes a PHY connection circuit and a network interface circuit. The PHY connection circuit is connected to the processing chip of the processing control module, and the PHY connection circuit is connected to the network cable of the FTU terminal through the network interface circuit.

[0009] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, the processing chip is connected to the PHY connection circuit through the RMII interface.

[0010] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, the detection control unit further includes a power supply module, a communication module, an SD card connector module, and a control display module, all of which are connected to the processing chip.

[0011] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, the power supply module includes a step-down circuit and an application circuit, wherein the step-down circuit is connected to the processing chip through the application circuit.

[0012] As a preferred embodiment of the intelligent detection circuit for the disconnection of the FTU terminal of the power distribution automation circuit breaker of the present invention, wherein: the control display module adopts a Taojingchi serial port screen;

[0013] The control and display modules are connected to each other via asynchronous serial ports.

[0014] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, the processing control module further includes a crystal oscillator circuit, a decoupling circuit, a reset circuit, an RTC clock circuit, and an ISP download circuit, all of which are connected to the processing chip.

[0015] As a preferred embodiment of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention, it further includes an auxiliary interface unit, which includes a USB interface socket, a serial port screen interface socket and a power input socket;

[0016] The USB interface socket is connected to the processing chip;

[0017] The control display module is connected to the processing chip via a serial port screen interface socket.

[0018] The beneficial effects of the intelligent detection circuit for FTU terminal disconnection in the power distribution automation circuit breaker of the present invention are as follows: through the cooperation between the detection control unit and the network connection unit, the usage status of the FTU power distribution automation terminal can be monitored in real time, thereby avoiding the problem that the FTU power distribution automation terminal cannot be detected and fed back in time after disconnection, which affects the use of the FTU power distribution automation terminal.

[0019] Existing FTU (Fluid Transmission Unit) distribution automation terminals still suffer from the problem of not being able to intelligently restart after going offline, resulting in a time-consuming and labor-intensive restart process. To address these issues, another objective of this invention is to provide an intelligent restart system for FTU terminals in distribution automation circuit breakers.

[0020] To solve the above-mentioned technical problems, the present invention also provides the following technical solution: a distribution automation circuit breaker FTU terminal intelligent restart system, which includes a distribution automation circuit breaker FTU terminal disconnection intelligent detection circuit; and a restart unit, which is connected to the power supply module, the processing control module and the FTU terminal power interface respectively.

[0021] In a preferred embodiment of the intelligent restart system for the FTU terminal of the power distribution automation circuit breaker of the present invention, the step-down circuit of the power supply module is connected to the restart unit.

[0022] The beneficial effects of the intelligent restart system for distribution automation circuit breaker FTU terminals of the present invention are as follows: through the cooperation between the restart unit, the detection control unit and the network connection unit, the disconnected FTU distribution automation terminal can be intelligently restarted, which solves the problem that the dispatching cannot remotely operate the power outage and restoration due to the disconnection of the distribution automation FTU terminal, saving time and effort, and improving the operating efficiency and power supply reliability of the distribution automation FTU terminal. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0024] Figure 1 This is a schematic diagram of the overall circuit for intelligent detection of FTU terminal disconnection in power distribution automation circuit breakers.

[0025] Figure 2This is a circuit diagram of the processing and control module for the intelligent detection circuit of FTU terminal disconnection in a power distribution automation circuit breaker.

[0026] Figure 3 This is a step-down circuit diagram for the intelligent detection circuit of FTU terminal disconnection in a power distribution automation circuit breaker.

[0027] Figure 4 This is an application circuit diagram for the intelligent detection circuit of FTU terminal disconnection in power distribution automation circuit breakers.

[0028] Figure 5 This is the network interface circuit diagram for the intelligent detection circuit of FTU terminal disconnection in power distribution automation circuit breakers.

[0029] Figure 6 This is a PHY connection circuit diagram for the intelligent detection circuit of FTU terminal disconnection in a power distribution automation circuit breaker.

[0030] Figure 7 The circuit diagram of the 232 communication module for the intelligent detection circuit of FTU terminal disconnection in power distribution automation circuit breaker.

[0031] Figure 8 This is a circuit diagram of the SD card connector module for the intelligent detection circuit of FTU terminal disconnection in a power distribution automation circuit breaker.

[0032] Figure 9 This is the ISP download circuit diagram for the intelligent detection circuit of FTU terminal disconnection in power distribution automation circuit breakers.

[0033] Figure 10 A schematic diagram of the USB interface socket for the intelligent detection circuit of FTU terminal disconnection in a power distribution automation circuit breaker.

[0034] Figure 11 A schematic diagram of the serial port interface socket for the intelligent detection circuit of the FTU terminal disconnection of the power distribution automation circuit breaker.

[0035] Figure 12 This is a schematic diagram of the power input socket for the intelligent detection circuit of the FTU terminal disconnection in a power distribution automation circuit breaker.

[0036] Figure 13 This is a schematic diagram of the overall intelligent restart system for the FTU terminal of a power distribution automation circuit breaker.

[0037] Figure 14 This is a circuit diagram of the restart unit for the intelligent restart system of the FTU terminal of the power distribution automation circuit breaker.

[0038] Figure 15 The system processing flowchart for the intelligent restart system of the FTU terminal of the distribution automation circuit breaker.

[0039] Figure 16This is a diagram illustrating the control and display module of the intelligent restart system for the FTU terminal of a power distribution automation circuit breaker.

[0040] Figure 17 This is a schematic diagram of the restart principle of the intelligent restart system for the FTU terminal of a power distribution automation circuit breaker.

[0041] Figure 18 Build a detection principle diagram for existing technical solutions.

[0042] Figure 19 A detection principle diagram is constructed for this technical solution. Detailed Implementation

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0046] Example 1

[0047] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides an intelligent detection circuit for the disconnection of a distribution automation circuit breaker (FTU) terminal, including a detection control unit 100 and a network connection unit 200. The detection control unit 100 and the network connection unit 200 enable real-time monitoring of the usage status of the FTU distribution automation terminal, thereby avoiding the problem of failure to detect and respond in a timely manner after the FTU distribution automation terminal disconnects, which affects the use of the FTU distribution automation terminal. The detection control unit 100 includes a processing control module 101; the network connection unit 200 provides the basis for monitoring the FTU and is connected to the network cable of the FTU terminal and the processing control module 101 respectively.

[0048] Furthermore, the network connection unit 200 includes a PHY connection circuit 201 and a network interface circuit 202. The PHY connection circuit 201 is connected to the processing chip 101a of the processing control module 101, wherein the processing chip 101a is connected to the PHY connection circuit 201 through an RMII interface 101a-1; specifically, as shown... Figure 6 As shown, the PHY connection circuit 201 uses the LAN8720A application circuit. The LAN8720A is a low-power 10 / 100M Ethernet PHY layer chip. Its I / O pin voltages conform to the IEEE 802.3-2005 standard. It communicates with the Ethernet MAC layer through the RMII interface. Pins 18 (RMII TXD1), 17 (RMII TXD0), 16 (RMII TX EN), 15 (ETH RESET), 14 (RMII REF CLF), 13 (ETH MDC), 12 (ETH MDIO), 11 (RMII CRSDV), 8 (RMII TXD0), and 7 (RMII TXD1) of the LAN8720A are respectively connected to pins 34 (RMII TXD1), 33 (RMII TXD0), 48 (RMII TX EN), 84 (ETH RESET), 23 (RMII REF CLF), and 16 (ETH REF CLF) of the processing chip 101a. MDC), pin 25 (ETH MDIO), pin 32 (RMIICRSDV), pin 51 (RMII TXD0), and pin 52 (RMII TXD1); wherein, the PHY connection circuit 201 is connected to the network cable of the FTU terminal through the network interface circuit 202, specifically, as follows Figure 5 As shown, the network interface circuit 202 uses a 202RJ45 interface. Preferably, the RJ45 interface socket is HR911105A. In the network interface circuit 202, C19, C20, C21, C22, and C23 are filter capacitors to filter out some high-frequency interference signals. R15 and R16 are current-limiting resistors for the network indicator lights. Pin 9 (LINKLED) and pin 12 (SPEEDLED) of HR911105A are connected to pin 3 (LINKLED) and pin 2 (SPEEDLED) of LAN8720A of PHY connection circuit 201, respectively. Pin 1 (TPTX+) and pin 2 (TPTX-) of HR911105A are connected to the RXN and RXP of the network cable connected to the FTU terminal through wires, respectively. In use, the network cable connector is connected to the RJ45, and the other end of the network cable is connected to the RJ45 interface of the FTU device. A network cable is required in the middle.

[0049] Preferably, the processing chip 101a is an STM32F407VGT6, which includes modules such as CPU, memory, input / output interface, timer, ADC, SPI interface, and I2C interface to realize various control, calculation, and data processing functions. R6, R7, and ISP1 are the program download and debugging interfaces of the processing chip 101a.

[0050] The two pull-down resistors R10 and R17 are used to enable the processor chip 101a to fetch program instructions from flash memory and start running after being reset.

[0051] Furthermore, the detection control unit 100 also includes a power supply module 102, a RS-232 communication module 103, an SD card connector module 104, and a control display module 105. All of these modules are connected to the processing chip 101a. The power supply module 102 provides power to the entire detection circuit, providing the foundation for real-time detection. The power supply module 102 includes a step-down circuit 102a and an application circuit 102b. The step-down circuit 102a is connected to the processing chip 101a through the application circuit 102b. It should be noted that, as... Figure 3 As shown, the buck circuit 102a uses a BUCK buck circuit. The LMR16030SDDR chip in buck circuit 102a has a withstand voltage of 60V, meaning the input voltage can be DC 0V-DC 60V. However, the design must include redundancy and ensure output quality. The standard input voltage of this circuit is DC 12V-DC 36V, and the output voltage is DC 5V, providing a 5V power supply to the system. Figure 4 As shown, application circuit 102b uses the RT9013, a linear voltage regulator chip that converts the DC 5V output from buck circuit 102a to DC 3.3V, providing a 3.3V power supply to the system. Its capacitors C33, C36, C40, and C41 are all decoupling capacitors; specifically, as shown... Figure 7 As shown, the 232 communication module 103 uses SP3232 to convert TTL level to 232 level. C37, C39, C46, ​​and C47 are charge pump current, C51 is the chip decoupling capacitor, and J2 is the DB9 interface socket. The SP3232 pins 11 (USART3_TX) and 12 (USART3_RX) of the 232 communication module 103 are connected to pins 55 (USART3_TX) and 56 (USART3_RX) of the processing chip 101a via wires, respectively. Specifically, monitoring data can be stored in the SD card module 104 and a local export interface is provided. This data can be combined with relevant inspection work to determine the terminal's online status, providing reliable data for differentiated operation and maintenance and equipment operation status evaluation. For example, Figure 8As shown, the SD card connector module 104 uses a standard SDIO interface design for the SD memory card circuit. J1 is the SD memory card slot, R19, R21, R23, R27, and R29 are pull-up resistors, C23 is a decoupling capacitor, and R24 is a current-limiting resistor. The SDIO pins 1 (SDIO D2), 2 (SDIO D3), 3 (SDIOCMD), 5 (SDIO_CLK), 7 (SDIO D0), and 8 (SDIO D1) of the SD card connector module 104 are connected to pins 78 (SDIO D2), 79 (SDIO D3), 83 (SDIO CMD), 80 (SDIO_CLK), 65 (SDIO D0), and 66 (SDIO D1) of the processing chip 101a, respectively.

[0052] It should be noted that, as Figure 16 As shown, the control display module 105 adopts a Taojingchi serial port screen; wherein, the control display module 105 is connected to the control display module 105 via an asynchronous serial port, and the Taojingchi serial port screen is used to display some operating information and set some information through the screen.

[0053] Furthermore, such as Figure 2 As shown, the processing control module 101 also includes a crystal oscillator circuit 101b, a decoupling circuit 101c, a reset circuit 101d, an RTC clock circuit 101e, and an ISP download circuit 101g. All four circuits are connected to the processing chip 101a. Specifically, the crystal oscillator circuit 101b is composed of C10, C11, X2, and R12. A crystal oscillator is a high-precision and high-stability oscillator that, through certain external circuitry, can generate a sine wave with stable frequency and peak value. The processing chip 101 requires a pulse signal as a trigger signal to execute its instructions during operation. The solution is as follows: Processing chip 101 executes one or more instructions upon receiving a pulse; the decoupling circuit 101c, composed of C13, C14, C25, C26, C27, C28, and C29, prevents parasitic oscillations caused by positive feedback paths formed by the power supply, which could lead to a system crash in processing chip 101; R14, C17, and SW1 constitute the power-on reset and button reset circuit 101d; the RTC clock circuit 101e, composed of C12, C15, X3, D1, C16, CR1, and the RTC peripheral of processing chip 101, is an independent timer. The RTC module has a set of continuously counting counters and, with appropriate software configuration, can provide clock and calendar functions; for example... Figure 9As shown, the ISP download circuit 101g is a one-button download circuit based on CH340C. When DTR# is set high and RTS# is set low, Q2 and Q3 are both turned on, BOOT0 is at a high level and RESET is at a low level. STM32 enters the BootLoader at this time to prepare for programming. The function of CH340C is to convert USB signals to TTL level signals. R18, R26, R20, R28, R30, and R31 are all current-limiting resistors. USB1 is a TYPE-C interface socket.

[0054] This also includes an auxiliary interface unit 300, which includes a USB interface socket 301, a serial screen interface socket 302, and a power input socket 303; wherein the USB interface socket 301 is connected to the processing chip 101a, specifically, as shown below. Figure 10 As shown, the USB interface socket 301 is USB2, and its pins 3 (USB DP) and 2 (USB_DM) provide wires to connect to pins 71 (USB DP) and 70 (USB_DM) of the processing chip 101a, respectively; wherein, the control display module 105 is connected to the processing chip 101a through the serial screen interface socket 302, specifically as follows. Figure 11 As shown, the serial port screen interface socket 302 uses a JP3 connector, providing a connection for the control display module 105. Pins 2 (HMI TXD) and 3 (HMI_RXD) of the serial port screen interface socket 302 are connected to pins 86 (HMI TXD) and 87 (HMI_RXD) of the processing chip 101a, respectively; specifically, as... Figure 12 As shown, the power input socket 303 uses the JP1 interface, which is the power input socket for the entire system.

[0055] Before use, connect the detection control unit 100 to the network cable of the FTU terminal via the network connection unit 200. Configure the monitoring station to receive timed monitoring data using the control display module 105. During use, if... Figure 15As shown, monitoring is initiated by controlling the display module 105. The communication module (conventional communication method) connected to the FTU terminal transmits data signals via network cable. The data signals are periodically transmitted to the MAC peripheral of the processing chip 101a through the network interface circuit 202, PHY connection circuit 201, and RMII interface 101a-1. After receiving a data frame from the PHY connection circuit 201LAN8720A, the MAC peripheral of the processing chip 101a sends a response request to the CPU of the processing chip 101a. When the CPU receives the request, it will process the data frame. By using LwIP (open source TCP / IP protocol stack) to parse the data packet, if the processing chip 101a determines whether the data is a TCP / UDP data packet, if so, the processing chip 101a will continue to receive and parse the data; if not, the current time is stored in the SD storage card. Monitoring personnel can then combine this with relevant inspection work to determine the online status of the terminal, providing reliable data for differentiated operation and maintenance and equipment operation status evaluation.

[0056] In summary, by cooperating with the detection control unit and the network connection unit, the usage status of the FTU power distribution automation terminal can be monitored in real time. This can prevent the failure to detect and respond promptly when the FTU power distribution automation terminal goes offline, thus avoiding the problem of affecting the use of the FTU power distribution automation terminal.

[0057] Example 2

[0058] Reference Figure 13 and Figure 17 This is the second embodiment of the present invention. Unlike the previous embodiment, it also includes a distribution automation circuit breaker FTU terminal intelligent restart system, including a distribution automation circuit breaker FTU terminal disconnection intelligent detection circuit; and a restart unit 400, which is connected to the power supply module 102, the processing control module 101 and the FTU terminal power interface respectively. The cooperation between the restart unit 400, the detection control unit 100 and the network connection unit 200 can intelligently restart the disconnected FTU distribution automation terminal, solving some of the problems caused by the disconnection of the distribution automation FTU terminal, which prevents remote control operation of power outages and restorations. This saves time and effort and improves the operating efficiency and power supply reliability of the distribution automation FTU terminal.

[0059] Specifically, such as Figure 14As shown, the restart unit 400 is a relay circuit. When it is necessary to turn off the power of the target device, the relay contacts are opened, that is, the switch is open. At this time, there is no power input to the target device. When it is necessary to supply power to the target device, the relay contacts are closed. R22 is a current-limiting resistor, R25 is a pull-down resistor, Q1 is the control transistor of the relay, and D3 is a freewheeling diode. The pin FTU RESET of the restart unit 400 is connected to pin 97 (FTU RESET) of the processing chip 101a, and the JP4 interface is connected to the FTU power supply.

[0060] Among them, the step-down circuit 102a of the power supply module 102 provides a 5V voltage and is connected to the restart unit 400, providing a basis for restarting.

[0061] Before use, connect the detection control unit 100 to the network cable of the FTU terminal via the network connection unit 200. Configure the monitoring station to receive timed monitoring data using the control display module 105. During use, if... Figure 15 As shown, monitoring is initiated by controlling the display module 105. The communication module connected to the FTU terminal transmits data signals via a network cable. The data signals are periodically transmitted to the MAC peripheral of the processing chip 101a through the network interface circuit 202, the PHY connection circuit 201, and the RMII interface 101a-1. After receiving a data frame from the PHY connection circuit 201LAN8720A, the MAC peripheral of the processing chip 101a sends a response request to the CPU of the processing chip 101a. When the CPU receives the request, it will process the data frame. By using LwIP (an open-source TCP / IP protocol stack) to parse the data packet, if the processing chip 101a determines whether the data is a TCP / UDP data packet, if so, the processing chip 101a will continue to receive... If the data is not received and parsed, the current time is stored in the SD memory card, and the restart process is started. The restart of the device is controlled by a normally closed relay, which is connected to the processing chip 101a through the IO port. When the IO port outputs a high level, the relay contacts open, and the positive power supply of the communication module and the FTU device is disconnected. The device enters shutdown mode when there is no power input. When the IO port outputs a low level, the relay contacts close, and the positive power supply of the communication module and the FTU device is connected. The device enters the power-on state from the shutdown state, thereby realizing the restart (using a normally closed relay to control the power supply of the target device, enabling the restart of the device, then opening the relay contacts (i.e., turning off the device power), and closing the contacts again after a certain delay to supply power to the target device, i.e., the FTU device).

[0062] In summary, the coordinated operation of the restart unit 400, the detection and control unit 100, and the network connection unit 200 solves the problem of needing on-site restarts when distribution automation terminals go offline. Data can be stored in the storage module and a local export interface is provided, allowing for assessment of terminal online status in conjunction with relevant inspection work, providing reliable data for differentiated operation and maintenance and equipment operation status evaluation. This improves the operational efficiency and power supply reliability of distribution automation FTU terminals, resolving some issues where remote control operation for power outages and restorations is impossible due to distribution automation FTU terminal offline. It also increases the online rate and power supply reliability of distribution automation FTU terminals, optimizing the customer's power experience. Furthermore, it significantly reduces the maintenance pressure on the maintenance and testing team. Since signals cannot be transmitted back to the main station after a distribution automation switch goes offline, making fault diagnosis difficult, this system improves the accuracy of fault diagnosis and guides the maintenance department to quickly restore power.

[0063] The ISP download circuit 101 programming and monitoring code is as follows:

[0064]

[0065]

[0066]

[0067]

[0068]

[0069]

[0070]

[0071]

[0072]

[0073]

[0074]

[0075]

[0076]

[0077]

[0078]

[0079]

[0080]

[0081] Example 3

[0082] Reference Figures 18-19 This is the third embodiment of the present invention. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through economic benefit calculation and simulation experiments.

[0083] The experimental equipment includes: FTU terminal equipment: the FTU terminal is equipped with communication module A; control console: the control console is equipped with communication module B.

[0084] like Figure 18 As shown, the existing solution is constructed, and the detection method of the existing solution is as follows:

[0085] S1: Detection; Specifically, the microcontroller pings the FTU internal devices and communication module A once every set time interval.

[0086] S2: Fault detection; Specifically, if the microcontroller cannot ping the internal devices of the FTU and the communication module A within two consecutive ping time periods, the microcontroller determines that the FTU has crashed and disconnected.

[0087] like Figure 19 As shown, this solution is constructed, and the detection method of this solution is as follows:

[0088] S1: Detection; Specifically, the network cable connecting the internal communication module A of the FTU terminal to the internal device of the FTU, the differential signal line from the internal device of the FTU to the communication module A and connected to the host, periodically detects whether TCP / UDP data packets exist on the differential signal line.

[0089] S2: Fault detection; specifically, if TCP / UDP packets are detected within a certain time, the microcontroller determines that the FTU has crashed and disconnected.

[0090] To complete this experiment, six different types of FTU devices were tested. Under the condition of artificially simulating an FTU crash, the disconnection detection results of the six different FTU models were recorded using two different methods as follows:

[0091] Table 1

[0092] Scheme type This plan Existing solutions Detect the number of disconnections 6 3

[0093] The data in Table 1 clearly shows that, compared with existing solutions, this solution has a higher accuracy rate in detecting FTU terminal device crashes and disconnections, and is more reliable in use.

[0094] The following reasons were found for the failure of the existing detection method:

[0095] 1. If the internal devices of the FTU use a hardware TCP / IP protocol chip, then even if the FTI crashes, it will still reply with a ping command, thus causing the detection to fail;

[0096] 2. If the Ethernet of the FTU's internal devices has a firewall program installed, the ping command will be directly blocked.

[0097] The advantages of this solution are:

[0098] 1. It does not send any data or commands to the FTU device, so there is no possibility of it being killed;

[0099] 2. The hardware TCP / IP protocol chip will not send TCP / UDP packets to the communication module after the FTU terminal crashes, meaning that this solution can detect the success of each FTU terminal.

[0100] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0101] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0102] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A power distribution automation circuit breaker FTU terminal disconnection intelligent detection circuit, characterized in that: include, The detection control unit (100) includes a processing control module (101). The network connection unit (200) is connected to the network cable of the FTU terminal and the processing control module (101) respectively; The network connection unit (200) includes a PHY connection circuit (201) and a network interface circuit (202). The PHY connection circuit (201) is connected to the processing chip (101a) of the processing control module (101), and the PHY connection circuit (201) is connected to the network cable of the FTU terminal through the network interface circuit (202). The processing chip (101a) is connected to the PHY connection circuit (201) via the RMII interface (101a-1).

2. The intelligent detection circuit for FTU terminal disconnection in power distribution automation circuit breakers as described in claim 1, characterized in that: The detection control unit (100) also includes a power supply module (102), a 232 communication module (103), an SD card connector module (104), and a control display module (105), all of which are connected to the processing chip (101a).

3. The intelligent detection circuit for FTU terminal disconnection in power distribution automation circuit breakers as described in claim 2, characterized in that: The power supply module (102) includes a step-down circuit (102a) and an application circuit (102b). The step-down circuit (102a) is connected to the processing chip (101a) through the application circuit (102b).

4. The intelligent detection circuit for FTU terminal disconnection in power distribution automation circuit breakers as described in claim 3, characterized in that: The control display module (105) adopts a Taojingchi serial port screen; Among them, the control display module (105) and the control display module (105) are connected by an asynchronous serial port.

5. The intelligent detection circuit for FTU terminal disconnection in power distribution automation circuit breakers as described in claim 4, characterized in that: The processing control module (101) further includes a crystal oscillator circuit (101b), a decoupling circuit (101c), a reset circuit (101d), an RTC clock circuit (101e), and an ISP download circuit (101g), all of which are connected to the processing chip (101a).

6. The intelligent detection circuit for FTU terminal disconnection in power distribution automation circuit breakers as described in claim 5, characterized in that: It also includes an auxiliary interface unit (300), which includes a USB interface socket (301), a serial screen interface socket (302), and a power input socket (303). The USB interface socket (301) is connected to the processing chip (101a); The control display module (105) is connected to the processing chip (101a) via a serial port screen interface socket (302).

7. A distribution automation circuit breaker FTU terminal intelligent restart system, characterized in that: Includes the intelligent detection circuit for FTU terminal disconnection in distribution automation circuit breakers as described in any one of claims 1 to 6; and, The restart unit (400) is connected to the power supply module (102), the processing control module (101), and the FTU terminal power interface, respectively.

8. The intelligent restart system for the FTU terminal of the distribution automation circuit breaker as described in claim 7, characterized in that: The step-down circuit (102a) of the power supply module (102) is connected to the restart unit (400).

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