Distribution automation circuit breaker FTU terminal intelligent monitoring remote directional restarting device

Abstract

The utility model discloses a distribution automation circuit breaker FTU terminal intelligent monitoring remote directional restart device, comprising a one-chip microcomputer, the one-chip microcomputer reads Ethernet data from a communication module and FTU equipment through a physical layer, and controls on-off of a line from a positive electrode of a power supply assembly to the communication module and the FTU equipment through a circuit breaker assembly. The off-line directional restart device for the distribution network automation equipment has the beneficial effects that after the off-line directional restart device for the distribution network automation equipment is cut off once, the device can be locked (the duration can be set according to requirements), and the reliability and the safety of the equipment are improved; data can be stored in the storage module, an on-site export interface is provided, the online condition of the terminal can be judged in combination with related inspection work, and reliable data is provided for differentiated operation and maintenance and equipment operation state evaluation; the operation benefit and the power supply reliability of the distribution automation FTU terminal are improved, and part of the problem that power failure and power recovery cannot be remotely operated by dispatching due to disconnection of the distribution automation FTU terminal is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution networks, in particular to a device for intelligent monitoring and remote directional restarting of a FTU terminal of a power distribution automation circuit breaker. Background Art

[0002] When carrying out the operation and maintenance of the distribution automation FTU terminal, the following problems were found in the distribution automation FTU terminal: (1) At present, due to the rapid development of automation technology, the operation mode of the distribution automation circuit breaker can be remotely controlled, and the protection setting value can be modified remotely. However, due to the imperfect development of wireless communication technology, the terminal wireless communication is stuck due to on-site signal fluctuations, and the wireless communication module cannot follow the switch after the base station tower frequency band is switched. These methods are the main reasons for the disconnection of automation equipment at this stage, and all require on-site restart. At present, the proportion of FTU distribution automation terminals in the entire Kunming area that need to be restarted on-site before the terminal can be restored to the line is as high as 80%, which adds a lot of workload and difficulty to the operation and maintenance of the distribution automation switch; (2) Due to the inconvenient transportation and long distances at some points, once the disconnection and fault occur at the same time, the circuit breaker cannot be remotely operated, and the efficiency of the distribution automation equipment cannot be fully utilized. In addition, since it is impossible to operate remotely, the circuit breaker operation requires invoicing, ticket review, receiving tools, ordering, and execution; the business is cumbersome and the execution steps are time-consuming. During holidays, when multiple faults occur and staff are insufficient, power transfer and isolation operations often cannot be carried out immediately. Travel time and on-site operation time not only affect the user experience but also increase the pressure on operations and maintenance personnel. According to statistics, over 80% of power distribution automation outages in the Kunming area can be restored after a restart. This research was conducted to improve power supply reliability, enhance customer experience, and enhance the practical effectiveness of power distribution automation. Dongchuan, one of the three counties in northern Kunming, is sparsely populated and its historical mainstay industry was mining. While most mining operations have ceased, some people still live in the mining areas. Based on these reasons, the characteristics of the power grid under the jurisdiction of Dongchuan Bureau are as follows: it covers a wide area with low load density, and some distribution network line points are located in high mountains and dangerous roads with long distances (it takes 3 hours to travel from Dongchuan city to the farthest distribution automation point, and 1.5 hours to travel from the local power supply station). In addition, due to the lack of maintenance in the mines and the suspension of heavy industry, the trees in the forest area are growing rapidly and the activities of small animals are becoming more frequent. There are more and more faults caused by trees and small animals. Due to terminal disconnection, delayed isolation and delayed supply are also common. Due to device jamming and other reasons, the maintenance test team often spends 6 hours on both sides to restart the device for 10 minutes to get it back online. In order to solve the above business problems, this study was carried out; (3) According to the statistics of the existing district and county bureaus in Kunming area, the disconnection caused by equipment downtime accounts for more than half of the equipment disconnection, and the disconnection caused by downtime can be restored by restarting the equipment. Installing equipment to automatically restart the equipment when it detects disconnection can improve the efficiency of personnel operation and maintenance. Wireless transmission interfaces and transmission functions are reserved to provide a basis for later intelligent operation and maintenance; Internet of Things interfaces are reserved to provide a basis for later intelligent operation and maintenance and network access. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0004] Therefore, the problem to be solved by the present invention is how to solve the problem that the distribution automation terminal needs to be restarted on site when it is offline.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a distribution automation circuit breaker FTU terminal intelligent monitoring remote directional restart device, including a single-chip microcomputer, which reads Ethernet data from the communication module and FTU equipment through the physical layer, and controls the on-off of the line from the positive pole of the power supply component to the communication module and FTU equipment through the circuit breaker component.

[0006] As an optimal solution for the intelligent monitoring and remote directional restart device of the distribution automation circuit breaker FTU terminal of the utility model, the physical layer includes a CH395 chip and an RJ45 interface, the RJ45 interface is connected to the communication module and the FTU device through a network cable, and the RJ45 interface is connected to the TDP / TDN / RDP / RDN pins of the CH395 chip through the TD+ / TD- / RD+ / RD- pins respectively.

[0007] As a preferred solution of the intelligent monitoring and remote directional restart device for the FTU terminal of the distribution automation circuit breaker of the utility model, the CH395 chip sends data to the MAC layer of the single-chip microcomputer through the RMII interface.

[0008] As a preferred solution of the distribution automation circuit breaker FTU terminal intelligent monitoring remote directional restart device described in the utility model, the power supply component sequentially reduces the voltage of 100-240V AC to 5V DC and 3.3V DC.

[0009] As a preferred solution of the intelligent monitoring and remote directional restart device for the FTU terminal of the distribution automation circuit breaker of the utility model, the circuit breaker assembly is composed of two sets of normally closed circuit breakers with the same structure, including a circuit breaker body and a control transistor. The base of the control transistor is connected to the output end through a current-limiting resistor, the collector is connected to a 5V DC power supply after passing through the circuit breaker body coil, and the emitter is grounded;

[0010] A freewheeling diode is connected in parallel at both ends of the circuit breaker body coil, and the circuit breaker body coil controls the on and off of the circuit breaker body common contact and the normally open contact.

[0011] As a preferred solution of the intelligent monitoring and remote directional restart device of the distribution automation circuit breaker FTU terminal of the utility model, it also includes a 232 communication interface, the TIIN and RIOUT pins of the 232 communication interface receive the TTL level signal from the USART3 of the microcontroller, and are connected to the DB9 interface through the TIOUT and RIIN pins to transmit and convert the RS-232 level signal.

[0012] As a preferred solution of the intelligent monitoring and remote directional restart device for the FTU terminal of the distribution automation circuit breaker described in the utility model, the single-chip microcomputer is also provided with USB DN and USB DP interfaces.

[0013] As an optimal solution for the intelligent monitoring and remote directional restart device of the distribution automation circuit breaker FTU terminal described in the utility model, it also includes a USB interface socket, a serial port screen interface socket and a power supply component input socket.

[0014] The beneficial effects of the intelligent monitoring and remote directional restart device for the FTU terminal of the distribution automation circuit breaker of the utility model are as follows: the offline directional restart device of the distribution network automation equipment can lock the device (the duration can be set according to needs) after being disconnected once, thereby improving the reliability and safety of the equipment; the data can be stored in the storage module, and an on-site export interface is provided, which can be combined with relevant patrol work to judge the online status of the terminal, and provide reliable data for differentiated operation and maintenance and equipment operation status evaluation; it improves the operating efficiency and power supply reliability of the distribution automation FTU terminal, and solves the problem that the dispatcher cannot remotely operate the power outage and restoration due to the disconnection of the distribution automation FTU terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 inventive work. Among them:

[0016] Figure 1 It is the overall framework diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the data reading principle of the single chip microcomputer of the utility model;

[0018] Figure 3 It is a flow chart of the overall function realization of the utility model.

[0019] Figure 4 This is one of the single chip microcomputer circuit diagrams of the utility model;

[0020] Figure 5 This is the second single chip microcomputer circuit diagram of the utility model;

[0021] Figure 6 This is the AC-DC conversion circuit diagram of the utility model;

[0022] Figure 7 This is the application circuit diagram of EA8103 of the utility model;

[0023] Figure 8 This is the RJ45 circuit diagram of the physical layer of the utility model;

[0024] Figure 9 This is the application circuit diagram of CH395 of the physical layer of the utility model;

[0025] Figure 10 This is a circuit diagram of a circuit breaker assembly of the present utility model;

[0026] Figure 11 This is the ISP download circuit diagram of the utility model;

[0027] Figure 12 This is the 232 communication circuit diagram of the utility model;

[0028] Figure 13 This is the USB interface circuit diagram of the utility model;

[0029] Figure 14 It is other interface diagram of the utility model; DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" 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 various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1

[0034] Reference Figure 1 、 Figure 2 and Figure 3 , which is the first embodiment of the utility model, provides a distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device, including a single-chip microcomputer 100, which reads Ethernet data from the communication module and FTU equipment through the physical layer PHY, and controls the on-off of the line from the positive pole of the power supply component 300 to the communication module and FTU equipment through the circuit breaker component 200.

[0035] Figure 2 This is the Ethernet block diagram (MAC peripheral structure) of the STM32F411 microcontroller chip. It can be seen that the STM32F407VET6 must be connected to an external physical layer (PHY chip) to complete Ethernet data reading. The design uses the RMII interface and the PHY layer chip to connect. The network wiring only uses the LAN8720A receiver. After the receiver converts the data, it sends the data to the MAC layer (STM32F407VET6's MAC peripheral) through the RMII interface.

[0036] The device is restarted by a normally closed relay, which is connected to the STM32F407VET6 through an ordinary IO port for control. When the IO port outputs a high level, the relay contacts are disconnected, and the positive power poles of the communication module and the FTU device are also disconnected. The device enters the shutdown state without power input; when the IO port outputs a low level, the relay contacts are closed, and the positive power poles of the communication module and the FTU device are connected. The device enters the startup state from the shutdown state, thereby achieving a restart.

[0037] After the STM32F411's MAC peripheral receives a frame of data from the CH395, it sends a response request to the STM32F411's CPU. After receiving the request, the CPU processes the frame of data. If the parsed data is not a TCP / UDP packet, the device will be restarted.

[0038] U1 is an STM32F407VGT6 MCU, which includes CPU, memory, input and output interfaces, timer, ADC, SPI interface, I2C interface and other modules to realize various control, calculation, data processing and other functions. The minimum MCU system refers to the system that can work with the MCU composed of the least components. It mainly includes the following circuit parts:

[0039] Power supply circuit: Provides a stable operating voltage for the microcontroller, usually a DC power supply, such as a 5V DC power supply, which is the basis for the microcontroller to work normally.

[0040] Clock circuit: It is composed of components such as crystal oscillators and capacitors. It provides clock signals for the microcontroller, ensuring that the internal components of the microcontroller can work according to a fixed timing. It is the driving force for the normal operation of the microcontroller.

[0041] Reset circuit: used to initialize the microcontroller to its initial state when the microcontroller is powered on or the system needs to be restarted, ensuring that the microcontroller starts working from a certain state.

[0042] These circuits together constitute the MCU's minimum system, enabling the MCU to operate independently and complete specific tasks. In actual applications, other circuits, such as programming interface circuits and external expansion interface circuits, can be added to expand the MCU's functionality according to specific needs.

[0043] Example 2

[0044] Reference Figure 4 、 Figure 5 、 Figure 8 and Figure 9 , which is the second embodiment of the present utility model. What is different from the previous embodiment is that this embodiment provides a physical layer PHY, including a CH395 chip and an RJ45 interface. The RJ45 interface is connected to the communication module and the FTU device through a network cable. The RJ45 interface is connected to the TDP / TDN / RDP / RDN pins of the CH395 chip through the TD+ / TD- / RD+ / RD- pins respectively.

[0045] The CH395 chip sends data to the MAC layer of the microcontroller 100U1 through the RMII interface.

[0046] The RJ45 interface used is HR911105A. 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 signal light.

[0047] The CH395 chip features a built-in 10 / 100M Ethernet media transport layer (MAC) and physical layer (PHY), fully compatible with the IEEE 802.3 10 / 100M protocol. It also includes built-in Ethernet protocol stack firmware for IP, DHCP, ARP, ICMP, IGMP, UDP, and TCP. Microcontroller systems can easily communicate over the network using the CH395 chip. The CH395 supports three communication interfaces: an 8-bit parallel port, an SPI interface, or an asynchronous serial port. Controllers such as microcontrollers, DSPs, MCUs, and MPUs can control the CH395 chip for Ethernet communication using any of these interfaces.

[0048] Example 3

[0049] Reference Figure 6 and Figure 7 , which is the third embodiment of the present utility model. Different from the first two embodiments, this embodiment provides a power supply component 300 to sequentially step down 100-240V AC power to 5V DC power and 3.3V DC power.

[0050] AC-DC converter circuit, HE05O15LRN has a voltage input range of 100~240VAC, outputs 5VDC, and has a capacity of 15W, providing 5V power for the system.

[0051] EA8103 is a linear voltage regulator chip that steps down DC5V to DC3.3V to provide 3.3V power supply for the system. C44 and C45 are decoupling capacitors, R31 and R33 are output voltage regulating resistors, and R32 is an enable resistor.

[0052] Example 4

[0053] Reference Figure 10 This is the fourth embodiment of the present utility model. It differs from the previous three embodiments in that this embodiment provides a circuit breaker assembly 200 comprising two sets of normally closed circuit breakers of identical structure, including a circuit breaker body JK1 and a control transistor D5. The base of the control transistor D5 is connected to the output terminal OUT1 via a current-limiting resistor R21, the collector is connected to a 5V DC power supply via the circuit breaker body JK1 coil, and the emitter is grounded. A freewheeling diode D3 is connected in parallel at both ends of the circuit breaker body JK1 coil. The circuit breaker body JK1 coil controls the on / off state of the common contact and the normally open contact of the circuit breaker body JK1.

[0054] The relay circuit works like a switch. When the target device's power supply needs to be turned off, the relay contacts are opened, effectively disconnecting the target device from power. When the target device needs to be powered on, the relay contacts are closed. R21 and R22 are current-limiting resistors, Q5 and Q6 are the relay's control transistors, and D3 and D4 are freewheeling diodes.

[0055] Example 5

[0056] Reference Figure 11 and Figure 12 , which is the fifth embodiment of the present utility model. It is different from the previous four embodiments in that this embodiment also provides a 232 communication interface. The TIIN and RIOUT pins of the 232 communication interface receive the TTL level signal from the USART3 of the microcontroller 100, and are connected to the DB9 interface through the TIOUT and RIIN pins to transmit and convert the RS-232 level signal.

[0057] 232 communication circuit. This circuit uses SP3232 to convert TTL level to 232 level. C37, C39, C46, ​​and C47 are charge pump currents, C51 is the chip's decoupling capacitor, and J2 is the DB9 interface socket.

[0058] Example 6

[0059] Reference Figure 13 and Figure 14 , which is the sixth embodiment of the present utility model. Different from the first five embodiments, this embodiment provides various other interfaces, and the single chip computer 100 is also provided with USB DN and USB DP interfaces.

[0060] It also includes USB interface socket USB2, serial port screen interface socket JP3 and power component input socket JP1.

[0061] The USB interface of an STM32 chip is typically implemented through specific pins, such as the USB-DN and USB-DP pins in the STM32F411 series. These two pins are key to USB communication and are used for data transmission. When designing a circuit, ensure that these pins are correctly connected to the USB interface and that the circuit layout is reasonable to minimize signal interference.

[0062] 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 the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A distribution automation circuit breaker FTU terminal intelligent monitoring remote directional restart device, characterized by: include, A single chip microcomputer (100) reads Ethernet data from a communication module and an FTU device through a physical layer (PHY), and controls the on / off of a line from the positive electrode of a power supply component (300) to the communication module and the FTU device through a circuit breaker component (200).

2. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 1, characterized in that: The physical layer (PHY) includes a CH395 chip and an RJ45 interface. The RJ45 interface is connected to the communication module and the FTU device through a network cable. The RJ45 interface is connected to the TDP / TDN / RDP / RDN pins of the CH395 chip through the TD+ / TD- / RD+ / RD- pins respectively.

3. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 2, characterized in that: The CH395 chip sends data to the MAC layer of the single chip computer (100) via the RMII interface.

4. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 3, characterized in that: The power supply component (300) sequentially steps down 100-240V alternating current to 5V direct current and 3.3V direct current.

5. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 4, characterized in that: The circuit breaker assembly (200) is composed of two groups of normally closed circuit breakers with the same structure, including a circuit breaker body (JK1) and a control transistor (D5), wherein the base of the control transistor (D5) is connected to the output end (OUT1) via a current limiting resistor (R21), the collector is connected to a 5V DC power supply after passing through the circuit breaker body (JK1) coil, and the emitter is grounded; A freewheeling diode (D3) is connected in parallel to both ends of the circuit breaker body (JK1) coil, and the circuit breaker body (JK1) coil controls the on / off of the circuit breaker body (JK1) common contact and the normally open contact.

6. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 5, characterized in that: It also includes a 232 communication interface, wherein the TIIN and RIOUT pins of the 232 communication interface receive TTL level signals from USART3 of the single chip microcomputer (100), are connected to the DB9 interface through the TIOUT and RIIN pins, and transmit and convert RS-232 level signals.

7. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to any one of claims 2 to 6, characterized in that: The single chip microcomputer (100) is also provided with USB DN and USB DP interfaces.

8. The distribution automation circuit breaker FTU terminal intelligent monitoring and remote directional restart device according to claim 7, characterized in that: It also includes a USB interface socket (USB2), a serial port screen interface socket (JP3) and a power component input socket (JP1).

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