A modular intelligent power distribution terminal and self-healing control method thereof

Abstract

The present invention provides a modular intelligent power distribution terminal and a self-healing control method thereof. The terminal includes a chassis, a guide rail assembly, a module base and a functional module unit. The guide rail assembly is installed at the bottom of the chassis for installing the module base. The module base is installed on the guide rail assembly for installing the functional module unit. The functional module unit is connected to the inside of the module base through a bus. The power module, core control module, remote control module, telemetry module, telesignaling module, communication module, positioning module and expansion module are sequentially installed on the module base. The method of the present invention is applied to the above-mentioned terminal. The present invention adopts a guide rail to realize modular configuration, and realizes automatic retrieval, positioning, navigation and recovery of non-fault areas of faults through self-healing control technology and positioning module, so as to realize plug-and-play, simple structure, safety and reliability, and intelligent self-healing of the power distribution terminal, which brings huge advantages for later module upgrades, Internet of Things transformation and other aspects.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a modular intelligent power distribution terminal and a self-healing control method using the terminal. Background Art

[0002] At present, the national power grid has been basically completed and the transmission technology has been further improved. However, with the continuous development of intelligence and networking, new requirements have been put forward for traditional power equipment. How to improve the safety, reliability and stability of power supply, how to reduce the cost of networking, and improve the safety and stability of the power grid has become an important issue. Therefore, the construction of an intelligent and automated power grid has become the main development direction of the power industry and the main driving force for further promoting the transformation and progress of the power industry. As an important part of the smart grid, the intelligence, automation, safety and stability of the distribution network that directly contacts users are crucial. An intelligent, automated, safe and reliable distribution terminal plays a vital role in achieving the overall goal of smart grid construction.

[0003] Although the distribution terminals currently used in the distribution network can also achieve intelligent control, their structures are all designed with traditional box structures. The intelligent construction is implemented by plugging into a fixed position in the chassis to achieve different application scenarios and on-site configurations. The number of slots in the chassis limits the number of components. When a power grid fails, large-scale power outages will cause great inconvenience to life and cause serious economic losses to production. At the same time, since various chips in the distribution terminal mostly use 5V DC power supply, the current solution is mostly to equip it with an external DC power supply, which not only makes the terminal structure complex but also easily causes accidents.

[0004] Therefore, in order to better adapt to the development of smart grids, it is necessary to design new distribution terminals that can use grid power, are easy to install, flexible to expand, and have fast diagnosis. Summary of the invention

[0005] The main purpose of the present invention is to provide a modular intelligent power distribution terminal with a self-healing control system in view of the shortcomings of the power distribution terminal in the current power equipment.

[0006] Another object of the present invention is to provide a self-healing control method for a modular intelligent power distribution terminal with a self-healing control system in view of the shortcomings of the power distribution terminal in the current power equipment.

[0007] In order to achieve the above-mentioned main purpose, the present invention provides a modular intelligent power distribution terminal, which includes a chassis, a guide rail assembly, a module base and a functional module unit. The guide rail assembly is installed at the bottom of the chassis for installing the module base, and the module base is installed on the guide rail assembly for installing the functional module unit. The functional module unit is connected to the inside of the module base through a bus; the functional module unit includes a power module, a core control module, a remote control module, a telemetry module, a telesignaling module, a communication module, a positioning module, and an extension module. The power module, core control module, remote control module, telemetry module, telesignaling module, communication module, positioning module, and extension module are installed on the module base in sequence.

[0008] In a further solution, a plurality of threaded holes are provided at the edge of the guide rail assembly, and the guide rail assembly is installed at the bottom of the chassis by bolt connection, wherein the guide rail assembly is configured as a hollow structure.

[0009] In a further solution, a slideway is provided under the module base to cooperate with the surface of the guide rail assembly. The slideways of multiple module bases are connected to the surface of the guide rail assembly by a mortise and tenon structure, and are fixed to the guide rail assembly by bolts and arranged on the guide rail assembly.

[0010] In a further solution, the surface of the module base has a double-row female socket for installing the functional module unit, and the double-row female socket is connected to the bus.

[0011] In a further solution, the core control module adopts a dual CPU structure, which is used to implement data sampling processing of the distribution terminal and various communication protocols of self-healing control. The two CPUs are connected and communicated through a high-speed serial port.

[0012] In a further solution, the bus includes a power line and a high-speed information transmission bus, which are respectively used for power supply and information transmission between various functional modules, wherein the high-speed information transmission line adopts a hybrid method of CAN bus transmission and AC analog SPI transmission.

[0013] In a further solution, the communication module includes an Ethernet communication module and a wireless communication module. The Ethernet communication module includes a physical interface transceiver chip, a transformer and an RJ45 physical interface for communicating with a master station. The wireless communication module adopts ZigBee communication technology and realizes wireless communication within a short distance through a ZigBee chip.

[0014] In a further solution, the dual CPU structure of the core control module includes a sampling CPU and a communication CPU. The sampling CPU is used for data collection and real-time processing of modules in the distribution terminal and realizes the protection function of the distribution terminal; the communication CPU is used for parsing and assembling various communication protocols and storing operation data.

[0015] In order to achieve the above-mentioned other purpose, the present invention provides a self-healing control method for a modular intelligent distribution terminal, wherein the modular intelligent distribution terminal adopts the above-mentioned modular intelligent distribution terminal, and the method includes: initializing the basic information of the distribution terminal and the communication information of the adjacent switch; obtaining the basic information of the adjacent distribution terminal according to the communication information of the adjacent device obtained in the initialization stage; calculating the load of each neighborhood feeder and converting it into the current size and the rated current of each outlet circuit breaker; judging whether the adjacent switch is a connecting switch; entering the fault startup stage to locate and isolate the fault; and controlling the connecting switch to restore power supply to the non-fault area.

[0016] A further solution is that the starting conditions of the fault startup phase include: a protection module is configured in the sampling CPU of each distribution terminal. When an overcurrent fault occurs in a distribution terminal or overcurrent fault information is received from an adjacent switch, self-healing control is started, and the detected fault information and switch status are actively sent to the adjacent switch, address information is generated to locate and isolate it, and the fault information and switch status of the adjacent switch are monitored.

[0017] It can be seen that the present invention has the following beneficial effects by adopting the above technical solution:

[0018] 1. The rail-fixed base is adopted to get rid of the limitation of the number of modules on the traditional chassis slots, and the number of modules can be freely combined on the entire chassis rail.

[0019] 2. The modularization of functional components enables quick disassembly and assembly of each module, making maintenance more convenient and use more convenient.

[0020] 3. The power module uses rectification and voltage division technology to directly use the grid power as the terminal power supply current without the need for an external power supply.

[0021] 4. The communication module adopts Ethernet and wireless communication system, which has intelligent operation of long-distance transmission and short-distance control.

[0022] 5. The application of positioning modules and self-healing technology can realize the monitoring, positioning and navigation of distribution terminal faults in the distribution network, and control the impact of the faults within a local range, effectively resisting the impact of natural disasters or equipment failures on the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of a guide rail assembly in an embodiment of a modular intelligent power distribution terminal of the present invention.

[0024] Figure 2 It is a structural schematic diagram of a module base in an embodiment of a modular intelligent power distribution terminal of the present invention.

[0025] Figure 3 It is a schematic diagram of an embodiment of a modular intelligent power distribution terminal of the present invention.

[0026] Figure 4 It is a schematic diagram of the sampling program function configuration flow of a modular intelligent power distribution terminal embodiment of the present invention.

[0027] Figure 5 It is a communication structure diagram of a modular intelligent power distribution terminal embodiment of the present invention.

[0028] Figure 6 It is a flowchart of an embodiment of a self-healing control method of a modular intelligent power distribution terminal of the present invention.

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be pointed out that the described implementation examples are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 3 The modular intelligent power distribution terminal of the present invention includes a chassis, a guide rail assembly, a module base and a functional module unit. The chassis plays a protective role. The guide rail assembly is installed at the bottom of the chassis for installing the module base. The module base is installed on the guide rail assembly for installing the functional module unit. The functional module unit is connected to the module base through a bus.

[0032] In this embodiment, the functional module unit includes a power module, a core control module, a remote control module, a telemetry module, a telesignaling module, a communication module, a positioning module, and an extension module. The power module, the core control module, the remote control module, the telemetry module, the telesignaling module, the communication module, the positioning module, and the extension module are installed on the module base in sequence.

[0033] There are multiple threaded holes on the edge of the guide rail assembly, and it is installed at the bottom of the chassis by bolt connection. The guide rail assembly is set as a hollow structure for wiring. Its surface is similar to the mortise and tenon structure of the module base. Its surface is provided with screw holes, which are fixed by bolts and can be placed anywhere in the chassis. This embodiment installs two guide rails at the bottom of the chassis, breaking the disadvantage that the traditional card-type module is limited by the number of buckles. Of course, the number of guide rails can be selected according to user needs.

[0034] Among them, a slideway is provided under the module base to cooperate with the surface of the guide rail assembly. The slideways of multiple module bases are connected to the surface of the guide rail assembly by a mortise and tenon structure, and are fixed to the guide rail assembly by bolts and arranged and installed on the guide rail assembly.

[0035] The surface of the module base has a double-row female socket for installing the functional module unit, and the double-row female socket is connected to the bus. Preferably, the double-row female socket of this embodiment can use the 2*8p type row socket of WXRKDZ to install the module, and the row socket is connected to the bus. The module base is of a unified standard, and each module base is only installed with one functional module.

[0036] It can be seen that the slideway that matches the guide rail assembly is prefabricated under the module base. The inside is hollow, and the threaded holes that match the guide rail are prefabricated in the middle. The module base is fixed to the guide rail by bolts and arranged on the guide rail. Its surface has a common row seat for installing modules, and the row seat is connected to the bus. The module base is of a unified standard, and each module base is only installed with one functional module.

[0037] In this embodiment, the core control module adopts a dual CPU structure, which is used to implement data sampling and processing of the power distribution terminal and various communication protocols of self-healing control, and the two CPUs are connected and communicated through a high-speed serial port. It can be seen that the core control module adopts a dual CPU design to implement data sampling and processing of the power distribution terminal and various communication protocols of self-healing control.

[0038] Furthermore, the core control module is mainly responsible for the coordination and control of each module, information security, data collection and aggregation, data analysis and processing, and remote transmission, and at the same time receives various local control operations from the remote control center. The dual CPU design is adopted to realize the data sampling and processing of the distribution terminal and various communication protocols of self-healing control respectively. The two CPUs are connected and communicated through a high-speed serial port. In addition, the core control module is also equipped with multiple interfaces to realize the access of external devices.

[0039] In this embodiment, the dual CPU structure of the core control module includes a sampling CPU and a communication CPU. The sampling CPU is used for data collection and real-time processing of modules in the distribution terminal and realizes the protection function of the distribution terminal; the communication CPU is used for parsing and assembling various communication protocols and storing operation data.

[0040] Preferably, this embodiment uses the STM32F746BE model of Texas Instruments (TI) as the processor of the core control module, the TMS320C6713 chip as the sampling CPU, the NAND flash of MICRON as the storage device, the DP83640 of National Semiconductor as the communication CPU, and the SN65HVD230 as the CAN transceiver. In addition, the core control module is also equipped with 4 RS232 / 485 multiplexing interfaces to realize the access of external devices.

[0041] In this embodiment, the bus includes a power line and a high-speed information transmission bus, which are respectively used for power supply and information transmission between various functional modules, wherein the high-speed information transmission line adopts a hybrid method of CAN bus transmission and AC analog SPI transmission.

[0042] In this embodiment, the communication module includes an Ethernet communication module and a wireless communication module. The Ethernet communication module includes a physical interface transceiver chip, a transformer and an RJ45 physical interface for communicating with a master station. The wireless communication module adopts ZigBee communication technology and realizes short-distance wireless communication through a ZigBee chip.

[0043] The STM32F746BE processor selected in this embodiment has an Ethernet controller, so the Ethernet communication module only needs a physical interface transceiver chip, a transformer, and an RJ45 physical interface. Preferably, the physical interface transceiver chip uses a LAN8742A-CZ-TR chip, which can support all Ethernet protocol contents. To save space, a differential routing method is used between the transformer, and an RJ45 device with an internal integrated transformer is selected.

[0044] The wireless communication module of this embodiment adopts ZigBee communication technology, with E18-MS1-IPX as the main module, and the communication distance can reach more than 100 meters, with an air rate of 250kbps, which can realize wireless communication within a short distance.

[0045] Furthermore, the power distribution terminal has a precise positioning module, which can realize Beidou / GPS dual positioning, so as to facilitate positioning and navigation when handling faults. Preferably, the positioning module selects ATGM336H full-star positioning and navigation module, which can realize Beidou / GPS dual positioning, so as to facilitate positioning and navigation when handling faults.

[0046] Furthermore, the power supply module includes a rectifier bridge, capacitors, resistors, step-down switching regulators, relays, transistors, etc., which are used to directly convert the mains or industrial electricity into the power supply voltage for other modules and the control voltage for the communication volume. Specifically, the input current uses the mains 220V or industrial electricity 380V, and the alternating current is converted into direct current through a rectifier bridge. One way of direct current obtains PI and PO signals through resistor voltage division and transistor conversion, and is converted and connected to the controller for communication processing through the chip; the other way is stabilized by capacitors, and through a step-down switching regulator, currents of different voltages are obtained to power each module. In addition, relays can be used to activate external virtual power supplies.

[0047] For example, after obtaining PI and PO signals, they are converted into TTL signals by the PB331 chip and connected to the core control module for communication processing; the other path is stabilized by capacitors, and the TPS5410D step-down switching regulator chip is used to convert the voltage into DC 5V and DC 24V to power the chips in each module and the optocoupler in the remote signal module. At the same time, the power module is equipped with two relays to realize the activation function of the external virtual power supply.

[0048] Furthermore, the telemetry module mainly realizes the acquisition of analog quantities of the running line. It is equipped with current transformers (CT), voltage transformers (PT) and AD conversion chips. The voltage and current measurements are completed through CT and PT, and the level signals are transmitted to the core control module through the AD conversion chip. The monitoring of the external battery can also be realized by collecting DC voltage and current. It can be seen that the telemetry module mainly realizes the acquisition of AC signals in the running line. The TV3154 voltage transformer (PT) and TA5222 current transformer (CT) are used to convert the AC analog quantity into voltage, and AD7606 is selected as the AD conversion chip to transmit the level signal to the core control module.

[0049] Furthermore, the remote signal module mainly realizes the collection of switch quantity signals of the running line. Due to the high voltage in the distribution network, it is necessary to install an optocoupler for electrical isolation and realize the collection of switch quantity, and the collected signal jumper method selects the digital quantity signal input level. Among them, since the voltage in the distribution network requires the voltage of the collected signal to be generally 100V, 220V or even higher, an isolation device is required to protect the collection pin. Therefore, the TLP620 optocoupler is installed for electrical isolation and realizes the collection of DC and AC switch quantities. The collected signal jumper method selects the digital quantity signal input level.

[0050] Furthermore, the remote control module mainly realizes the remote control function of the power distribution terminal, and is equipped with a photoelectric coupler, a transistor, and a relay. The level signal output by the core control module is amplified to obtain a higher voltage to drive the switches of various devices to realize the remote control function. And the remote control module is provided with anti-false operation measures, and the relay power supply will only be turned on when the remote control operation is performed. Among them, the level signal output by the core control module is amplified and isolated by the photoelectric coupler to reach a voltage of 12V, and the photoelectric coupler is used to drive the transistor and then drive the relay to output a 12V switching voltage. The 12V voltage output by the relay can basically drive all the equipment in the power distribution terminal.

[0051] Furthermore, the power distribution terminal can be equipped with an electric energy meter, which is connected to the RS-485 interface in the core module to achieve real-time observation or billing.

[0052] Furthermore, a location for installing an expansion module is reserved to facilitate functional expansion.

[0053] Furthermore, if Figure 4 As shown, the sampling CPU of the core control module is responsible for the data collection and real-time processing of other modules of the distribution terminal and realizes the protection function of the distribution terminal. Before work, it is necessary to complete the configuration of the "three remote" parameters, channel type, line parameters, protection settings, etc. of the remote control module, telemetry module, and remote signal module. Among them, the three remote parameters include the collected analog quantity, the number of line remote control channels, etc., and the delay time of remote control closing and opening; the channel type specifically refers to the configuration of the three attributes of the analog quantity voltage, current and DC according to the order of modules and collection; the line parameter refers to the custom arrangement of the analog quantity; the protection setting is the configuration and implementation of various protection functions, and the protection function is completed by comparing the preset critical value with the real-time collection value.

[0054] Furthermore, if Figure 5 As shown, the communication CPU interface of the core control module is responsible for parsing and assembling various communication protocols, storing running data, and implementing advanced applications. The implementation of the self-healing control technology of the present invention relies on the communication CPU. The communication CPU obtains sampled data in real time through the serial port, completes the processing, sorting, archiving, and storage of the data, and uses a preset algorithm to complete the self-healing control according to the processed data.

[0055] The present invention provides a self-healing control method for a modular intelligent power distribution terminal to realize the above-mentioned self-healing control technology. Specifically, the self-healing control method for a modular intelligent power distribution terminal of the present invention is applied to the above-mentioned modular intelligent power distribution terminal. Figure 6 , the self-healing control method comprises the following steps:

[0056] Step S1, initialization phase: Initialize the basic information of the power distribution terminal (voltage, current, switch status, three remote signals, etc.) and the communication information of the adjacent switches (IP address, MAC address, port number).

[0057] Specifically, in the initialization phase, the communication information of adjacent devices is obtained through GOOSE-61850 communication, and the SCD model file is configured to formulate the GOOSE subscription relationship between the distribution terminals. The connectionless mode with priority tags can bypass the TCP layer and IP layer of Ethernet and directly send and receive data through the data link layer and physical layer. When the network switch receives a message with a priority tag, it will give priority to forwarding to shorten the forwarding delay. The connectionless mode can save the trouble of back and forth confirmation to improve the transmission efficiency. All subscribers can receive a frame of message on the Internet.

[0058] Step S2, read the adjacent device information: according to the communication information of the adjacent device obtained in the initialization phase, obtain the basic information of the adjacent distribution terminal, such as voltage, current, switch status, three remote signals, etc.

[0059] Specifically, the basic information of adjacent distribution terminals is obtained through GOOSE-61850 communication, and data sets are continuously sent in a cycle at a stable time interval T0 (usually set to 5s). When a line fault occurs, the positions of all switches on the line and protection fault information are exchanged between adjacent distribution terminals through peer-to-peer communication.

[0060] Step S3, calculate the neighborhood feeder load: calculate each neighborhood feeder load and convert it into current size and the rated current of each outlet circuit breaker, etc., to obtain the total load current of the feeder cabinet in the distribution room and the capacity of the tie switch circuit breaker.

[0061] Step S4: determine whether the adjacent switch is a tie switch. This stage is automatically started when the initialization and self-healing control are completed.

[0062] In this embodiment, the total load current of the feeder cabinet in the power distribution room is compared with the capacity of the tie switch circuit breaker to determine whether the adjacent switch is a tie switch.

[0063] Among them, this embodiment determines whether the device is a tie switch by the switch attributes. If it is a tie switch, the power transfer self-healing logic is started, and whether the switch is closed is confirmed by comparing the total load current of the feeder cabinet in the distribution room with the capacity of the tie switch circuit breaker.

[0064] Step S5, fault start-up phase: entering the fault start-up phase.

[0065] Step S6, fault location and isolation: Fault location and isolation of the faulty power distribution terminal.

[0066] Step S7, restoring power supply to the non-fault area: controlling the tie switch to restore power supply to the non-fault area.

[0067] In this embodiment, when controlling the tie switch to restore power supply to the non-fault area, it specifically includes:

[0068] Node fault: If the phase current and zero-sequence current flowing through this node are greater than the set value, the node is judged to be faulty and the "node fault" GOOSE output signal is instantaneously triggered.

[0069] Fault removal: If only one of the nodes on the M and N sides does not send out a "node fault" GOOSE signal, the node switch will be tripped after the set fault tripping time limit.

[0070] Fault isolation: If no fault is detected at this node and a "node fault" GOOSE signal is received from one and only one node on the M side or N side, the switch of this node will be tripped after the set fault tripping time limit.

[0071] Power supply to non-fault areas is restored: After the interconnecting switch receives the signal that the fault has been removed successfully and the fault has been isolated successfully, if the total load current in the non-fault area is less than the capacity of the interconnecting cabinet circuit breaker, the circuit breaker will be closed with a delay to restore power supply to the non-fault area.

[0072] Furthermore, the starting conditions of the fault startup phase include: a protection module is configured in the sampling CPU of each distribution terminal. When an overcurrent fault occurs in a distribution terminal or overcurrent fault information is received from an adjacent switch, self-healing control is started, and the detected fault information and switch status are actively sent to the adjacent switch, address information is generated to locate and isolate it, and the fault information and switch status of the adjacent switch are monitored.

[0073] Therefore, the present invention innovatively adopts guide rails to realize modular configuration, and the power module uses rectification and voltage division technology to directly use the power of the power grid as the terminal power supply current. The Ethernet and wireless communication systems are used to realize intelligent operation of long-distance transmission and short-distance control. The automatic retrieval, positioning, navigation and recovery of non-fault areas of faults are realized through self-healing control technology and positioning module. Benefiting from the modularization of the distribution terminal and the application of self-healing technology, the distribution terminal is plug-and-play, simple in structure, safe and reliable, and intelligently self-healing, which brings huge advantages for later module upgrades, Internet of Things transformation, etc.

[0074] It can be seen that the present invention has the following beneficial effects by adopting the above technical solution:

[0075] 1. The rail-fixed base is adopted to get rid of the limitation of the number of modules in the traditional chassis slots, and the number of modules can be freely combined on the entire chassis rail.

[0076] 2. The modularization of functional components enables quick disassembly and assembly of each module, making maintenance more convenient and use more convenient.

[0077] 3. The power module uses rectification and voltage division technology to directly use the grid power as the terminal power supply current without the need for an external power supply.

[0078] 4. The communication module adopts Ethernet and wireless communication system, which has intelligent operation of long-distance transmission and short-distance control.

[0079] 5. The application of positioning modules and self-healing technology can realize the monitoring, positioning and navigation of distribution terminal faults in the distribution network, and control the impact of the faults within a local range, effectively resisting the impact of natural disasters or equipment failures on the distribution network.

[0080] It should be noted that "one embodiment", "another embodiment", "embodiment", "preferred embodiment" and the like mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the example included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention. Although the present invention is described herein with reference to a plurality of illustrative examples of the present invention, it should be understood that those skilled in the art can design many other modifications and implementations that fall within the scope and spirit of the principles disclosed in this application. More specifically, within the scope of the present application disclosure, drawings and claims, in addition to the deformation and improvement that can be made to the components and / or layout of the subject combination layout, other uses will also be obvious to those skilled in the art.

Claims

1. A self-healing control method for a modular intelligent power distribution terminal, characterized in that: The modular intelligent power distribution terminal comprises: A chassis, a guide rail assembly, a module base and a functional module unit, wherein the guide rail assembly is installed at the bottom of the chassis for installing the module base, the module base is installed on the guide rail assembly for installing the functional module unit, and the functional module unit is connected to the inside of the module base via a bus; The functional module unit includes a power module, a core control module, a remote control module, a telemetry module, a telesignaling module, a communication module, a positioning module, and an extension module, and the power module, the core control module, the remote control module, the telemetry module, the telesignaling module, the communication module, the positioning module, and the extension module are sequentially installed on the module base; A plurality of threaded holes are provided at the edge of the guide rail assembly, and the guide rail assembly is installed at the bottom of the chassis by bolt connection, wherein the guide rail assembly is configured as a hollow structure; A slideway is provided below the module base to cooperate with the surface of the guide rail assembly. The slideways of the multiple module bases are connected to the surface of the guide rail assembly by a mortise and tenon structure. The slideways of the module bases are fixed to the guide rail assembly and arranged on the guide rail assembly by bolts. The core control module adopts a dual CPU structure, which is used to implement data sampling and processing of the distribution terminal and various communication protocols for self-healing control. The two CPUs are connected and communicated through a high-speed serial port; the dual CPU structure of the core control module includes a sampling CPU and a communication CPU. The sampling CPU is used for data collection and real-time processing of modules in the distribution terminal and realizes the protection function of the distribution terminal; the communication CPU is used for parsing and assembling various communication protocols and storing operation data; The method comprises: Initialize the basic information of the power distribution terminal and the communication information of the adjacent switches; According to the communication information of the adjacent devices obtained in the initialization phase, the basic information of the adjacent power distribution terminals is obtained; Calculate the load of each neighborhood feeder and convert it into current size and rated current of each outlet circuit breaker; Determine whether the adjacent switch is a tie switch; Enter the fault startup phase to locate and isolate the fault; Control the contact switch to restore power supply to the non-fault area; Among them, by comparing the total load current of the feeder cabinet in the power distribution room with the capacity of the tie switch circuit breaker, it is determined whether the adjacent switch is a tie switch; Among them, the device switch attributes are used to determine whether it is a tie switch. If it is a tie switch, the power transfer self-healing logic is started, and the total load current of the feeder cabinet in the distribution room is compared with the capacity of the tie switch circuit breaker to confirm whether it is closed; Among them, when the control tie switch restores power supply to the non-fault area, it specifically includes: Node fault: If the phase current and zero-sequence current flowing through this node are greater than the set value, the node is judged to be faulty and the "node fault" GOOSE output signal is instantly triggered; Fault removal: If only one of the nodes on the M side and the N side does not send out the "node fault" GOOSE signal, the node switch will be tripped after the set fault tripping time limit; Fault isolation: If no fault is detected at this node and a "node fault" GOOSE signal is received from one and only one node on the M side or N side, the node switch will be tripped after the set fault tripping time limit; Power supply to non-fault areas is restored: After the contact switch receives a signal that the fault has been successfully removed and isolated, and the total load current in the non-fault area is less than the capacity of the contact cabinet circuit breaker, the contact switch will be closed with a delay to restore power supply to the non-fault area; The starting conditions of the fault startup phase include: a protection module is configured in the sampling CPU of each distribution terminal. When an overcurrent fault occurs in a distribution terminal or overcurrent fault information is received from an adjacent switch, the self-healing control is started, and the detected fault information and switch status are actively sent to the adjacent switch, address information is generated to locate and isolate it, and the fault information and switch status of the adjacent switch are monitored.

2. The method according to claim 1, characterized in that: The surface of the module base is provided with double-row female sockets for installing the functional module units, and the double-row female sockets are connected to the bus.

3. The method according to claim 1, characterized in that: The bus includes a power line and a high-speed information transmission bus, which are respectively used for power supply and information transmission between various functional modules, wherein the high-speed information transmission bus adopts a mixed mode of CAN bus transmission and AC analog SPI transmission.

4. The method according to claim 1, characterized in that: The communication module includes an Ethernet communication module and a wireless communication module. The Ethernet communication module includes a physical interface transceiver chip, a transformer and an RJ45 physical interface for communicating with a master station. The wireless communication module adopts ZigBee communication technology and realizes short-distance wireless communication through a ZigBee chip.

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