CN114006804A - Power distribution edge server system based on centralized protection control system architecture - Google Patents
Power distribution edge server system based on centralized protection control system architecture Download PDFInfo
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Abstract
The invention discloses a power distribution edge server system based on a centralized protection control system architecture, which comprises a core mainboard and a plurality of plug-ins; the core mainboard comprises two 64-bit multi-core CPUs and an FPGA; the FPGA is connected with the first CPU; the first CPU is connected with the second CPU; the plug-in units comprise 2-5 process layer optical port plug-in units, each process layer optical port plug-in unit is provided with 6 groups of SFP optical ports, a 4DO plug-in signal output, a 4DI plug-in unit for signal input, a station control layer network port plug-in unit for connecting a distribution network main station, a local background or device, a serial port plug-in unit for connecting the distribution network main station or a lower computer, and an LED management plug-in unit and an LED plug-in unit for displaying the running state of the double CPUs and the switch position, overcurrent and action information of each interval of the switch stations; the method can adapt to the application scenes of power distribution networks with different grid structures, communication means and fault types, and improve the speed and accuracy of fault positioning and fault isolation.
Description
Technical Field
The invention belongs to the field of distribution network automation, and particularly relates to a distribution edge server system based on a centralized protection control system architecture.
Background
Feeder Automation (FA) technology is used for fault detection, fault isolation and power restoration after a power distribution network has a fault, is a core function of a power distribution Automation system, and mainly comprises a main station centralized type and a local type. The centralized FA of the main station carries out fault location by depending on the communication between the main station and each distribution network terminal, and has the defects of dependence on communication, low location accuracy and low action speed; the local FA is divided into a recloser type, an intelligent distributed type and a relay protection type, has the advantages of high action speed and strong adaptability, is the main direction of the development of feeder automation technology in recent years, and is mainly completed by various Distribution network terminals (station Terminal DTU, feeder Terminal FTU and the like), wherein the DTU is arranged in a switch station (including a switching station, a ring main Unit, a Distribution room and the like), relates to the measurement and control of a plurality of switches, unifies the interface and function configuration of DTU equipment of different manufacturers, and the station Terminal (Distribution Terminal Unit, DTU) meeting national network specifications is divided into a centralized type and a distributed type. The centralized DTU is equivalent to a conventional multi-interval device, analog quantities and switching quantities of all switches are accessed to a plug-in device by hard wires, the centralized FA function is mainly executed by matching with a main station, and when the centralized DTU is applied in a switching station, protection measurement and control devices (commonly called as watchdog) at intervals are usually required to be additionally installed to complete the local protection function; the distributed DTUs are deployed in a mode of combining one public unit and a plurality of interval units, double networking communication of IEC61850-GOOSE and IEC104 protocols needs to be carried out between the units through external wiring, and each interval unit is still a conventional single interval device. Both the two methods have the problems of low reliability, insufficient functions, poor capability of adapting to the topological change of the distribution network, difficult upgrading of a new algorithm and the like, and can not well meet the requirement of continuous development of the distribution network.
Disclosure of Invention
The invention aims to solve the problems that: the utility model provides a distribution edge server system based on centralized protection control system framework to improve the reliability, the adaptability and the maintenance upgrading convenience of prior art feeder automation function.
The technical scheme of the invention is as follows:
a power distribution edge server system based on a centralized protection control system architecture comprises a core mainboard and a plurality of plug-ins; the core mainboard comprises two 64-bit multi-core CPUs and an FPGA; the FPGA is connected with the first CPU; the first CPU is connected with the second CPU; the plug-in components comprise 2-5 process layer optical port plug-in components, each process layer optical port plug-in component is provided with 6 groups of SFP optical ports, a 4DO plug-in component is used for outputting a main alarm and a main locking signal of the device, a 4DI plug-in component is used for accessing an overhaul pressing plate, a remote local pressing plate and a reset signal, a station control layer network port plug-in component is used for connecting 104 distribution network main stations, local backstage or devices, a serial port plug-in component is used for connecting distribution network main stations or lower computers, an LED management plug-in component is used for connecting debugging software, a liquid crystal display and an photoelectric IRIG-B code interface, and an LED plug-in component is used for displaying the running state of double CPUs and the switch position, overcurrent and action information of each interval of the switch stations.
The on-board communication interfaces among the chips comprise gigabit Ethernet, PCIe and Localbus, and each CPU is provided with EMMC, DDR3 and FLASH memories.
The power distribution edge server system is designed based on functional modules defined by software, and all the functional modules correspond to one logic device in an IEC61850-ICD file; the voltage, current and switch position information of all intervals in a switch station are accessed through an optical port, and besides a single-interval protection, measurement and control, recloser type FA and metering function module of a conventional centralized DTU and an intelligent distributed FA function of a distributed DTU, a bus protection, backup power automatic switching, small current grounding line selection and line differential protection function module based on multi-interval information of the switch station are also built.
The power distribution edge server system adopts IEC61850-SV/GOOSE protocol and ICD data modeling technology based and point-to-point synchronous communication between the small intelligent combination units of the distribution network server and the switches, and information synchronization and information exchange between the intervals in each station are carried out in the power distribution edge server.
The distribution edge server system is characterized in that an intelligent combining unit is respectively installed at all switch intervals of a switch station, each intelligent combining unit is designed based on a high protection level and a standardized and maintenance-free mode and is used for accessing a PT (potential Transformer), a CT (Current Transformer), a circuit breaker position and an opening and closing control function, and is accessed to the distribution edge server in a point-to-point mode by an IEC61850-SV/GOOSE protocol, communication is carried out between the distribution edge servers through a GOOSE peer-to-peer communication network, a distribution network master station is accessed by an IEC104 protocol, or maintenance tool software is accessed by the IEC61850-MMS protocol.
The distribution edge server system simultaneously uses an intelligent distributed FA module and a bus protection module to simultaneously position bus faults in the switch station; for dividing branch faults connected with the switching station, simultaneously using an intelligent distributed FA module and an overcurrent protection module of the dividing branch to simultaneously remove the faults; for the fault of the connecting line between the switch stations, a GOOSE peer-to-peer communication network is established between the power distribution edge servers through a process layer optical port or information interaction between adjacent switches between the stations is realized in a 5G wireless communication mode, so that an intelligent distributed FA function or a line differential protection function is realized.
The distribution edge server system is realized by centralizing all functions in one switching station in one distribution edge server, real-time data and historical data are checked according to logic equipment under a unified interface, multi-interval information is centralized into one recording file during fault recording, and the multi-interval information is displayed according to unified time scales so as to improve the fault analysis efficiency.
The implementation process of the power distribution edge server system in the distribution network system comprises the following steps:
step S410: a set of power distribution edge server and a plurality of intelligent combination units are installed in each switch station, each intelligent combination unit is connected with the PT, CT, breaker input position and output control node of each switch in a downward mode, and the intelligent combination units are connected with the process layer optical ports of the power distribution edge server in an upward mode through optical fibers;
step S420: configuring SCD files of the switch stations, establishing the transceiving connection of the logic equipment of each function module of the power distribution edge server and SV and GOOSE virtual terminals of each intelligent unit, and the transceiving connection of the GOOSE virtual terminals between the power distribution edge servers of adjacent switch stations, and then exporting CID and CCD files of each device to download to the corresponding devices respectively;
step S430: after each intelligent combining unit and the power distribution edge server are powered on and run, all functional modules are subjected to constant-value parameter setting and soft pressing plate switching by using the total-station unified maintenance work software;
step S440: when the power distribution network normally operates, the power distribution edge server collects and calculates telemetering and remote signaling information of each interval through each intelligent combining unit and communicates with a distribution network master station;
step S450: when the power distribution network fails, the corresponding functional module of the power distribution edge server performs a fault processing flow, outputs a fault positioning result and a power supply recovery instruction, respectively sends a switch opening and closing command to a fault adjacent switch, and reports each interval fault information to the distribution network master station;
step S460: and after receiving the GOOSE instruction of the power distribution edge server, each intelligent combining unit executes the on-off operation of the switch to complete fault isolation and power supply recovery.
The invention has the beneficial effects that:
the main equipment includes a Centralized Protection Control device and intelligent units of each interval, and the System has all interval information integrated, each interval Protection Control function is realized in a software module mode of edge calculation, and the communication between the function modules of the interval layers can be realized by sharing a memory, so that the number of equipment of the interval layers can be greatly reduced.
The invention adopts a power distribution edge server system constructed based on a centralized protection control system, can completely replace the functions of the existing DTU, and solves the problems of the existing DTU, and comprises the following steps:
1. the hardware classification and the software and hardware separation of the equipment are realized, the service life of the hardware is prolonged, and the richness and the expandability of software functions are improved.
2. The distribution edge server can synchronously acquire all interval information in the switch station, can construct high-precision fault location according to synchronous big data, avoids communication between interval units in the station, improves the speed and accuracy of fault processing in the station, and has strong adaptability to fault processing of the inter-station connecting line.
3. The invention can freely expand various functions based on the functional modules of software definition and edge calculation, and meets the requirement of continuous development of the power distribution network.
4. A plurality of devices in the station do not need to be maintained, uniform maintenance tool software or background software is provided, and maintenance and accident analysis are facilitated.
The reliability, the adaptability and the maintenance and upgrading convenience of the feeder automation function in the prior art are improved.
Drawings
FIG. 1 is a block diagram of the hardware architecture of a centralized DTU and a decentralized DTU;
FIG. 2 is a block diagram of the hardware architecture of the power distribution edge server of the present invention;
FIG. 3 is a software functional block diagram of the power distribution edge server of the present invention;
FIG. 4 is a block diagram of an installation deployment of a distribution edge server in a distribution network switchyard;
figure 5 depicts a flow chart of the operating principle of the distribution edge server.
Fig. 6 is a functional diagram of a distribution edge server in the event of a distribution network failure.
Fig. 7 is a schematic diagram of a maintenance tool interface for a power distribution edge server.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to more clearly explain the technical solutions and advantages of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Compared with the hardware structure of a centralized DTU (data transfer unit) and a distributed DTU (data transfer unit) (shown in figure 1), the power distribution edge server based on the centralized protection control system architecture is characterized in that the power distribution edge server consists of a core mainboard and a plurality of plug-ins, as shown in figure 2, the largest difference is that the AI analog input plug-ins and the DIO switching value input/output plug-ins in each interval are cancelled, and pure digital optical interface plug-ins are adopted for replacing the AI analog input plug-ins and the DIO switching value input/output plug-ins, and the AI and DIO digital value information of all intervals of a switching station can be accessed.
The core mainboard mainly comprises two high-performance 64-bit multi-core CPUs and a large-capacity FPGA, the in-board communication interfaces among the chips comprise gigabit Ethernet, PCIe, Localbus and the like, and each CPU is provided with large-capacity memories such as EMMC, DDR3, FLASH and the like. The plug-in units comprise 2-5 process layer optical port plug-in units (each with 6 groups of SFP optical ports), a 4DO plug-in unit (used for outputting a device total alarm and a total locking signal), a 4DI plug-in unit (used for opening a maintenance pressing plate, a remote local pressing plate, a reset signal and the like), and a station control layer network port plug-in unit (used for connecting 104 distribution network main stations, local background or other devices), the intelligent power supply system comprises a serial port plug-in (used for connecting 101 distribution network main stations or other lower computers and comprising 4G/5G wireless communication modules), an LED management plug-in (used for connecting debugging software, a liquid crystal display and an optical/electric IRIG-B code interface), an LED plug-in (used for displaying information such as the running state of double CPUs and the switch positions, overcurrent and actions of switch stations at intervals), and a power supply plug-in (comprising a double-power-supply module and capable of outputting DC24V to supply power for other equipment).
The software system of the distribution edge server is designed based on functional modules defined by software, all the functional modules correspond to a Logic Device (LD) in an IEC61850-ICD file, the software block diagram is shown in figure 3, and as the information of voltage, current, switch position and the like of all intervals in a switch station is accessed through at most 30 optical ports, functional modules of single-interval protection, measurement and control, recloser FA, metering and the like of a conventional centralized DTU and an intelligent distributed FA function of a distributed DTU can be built, functional modules of bus protection, backup automatic switching, small-current grounding line selection, line differential protection and the like of the switch station based on multi-interval information can be built, and the point-to-point synchronous communication between the distribution network server and small intelligent combination units of each switch is adopted based on IEC 50-SV/GOOSE protocol and ICD data modeling technology, the information synchronization and information exchange among the intervals in each station can be carried out in the power distribution edge server without external wiring, so that the functional disorder caused by external wiring faults is avoided, the reliability and the comprehensiveness of the protection and fault positioning functions are improved, and the functional redundancy can be realized. For example, for bus faults in a switching station, the intelligent distributed FA module and the bus protection module can be used for positioning at the same time; for dividing branch faults connected with the switching station, the intelligent distributed FA module and the overcurrent protection module of the dividing branch can be used for simultaneously removing the faults; for the fault of the connecting line between the switch stations, the information interaction between the adjacent switches between the stations can be realized by establishing a GOOSE peer-to-peer communication network (or in a 5G wireless communication mode) between the power distribution edge servers through the process layer optical port, so that the intelligent distributed FA function or the line differential protection function is realized.
A block diagram of the equipment deployment of the distribution edge servers of two adjacent switchyard stations of a distribution network is shown in fig. 4. The intelligent switching station is characterized in that small intelligent switching units are respectively installed at all switch intervals of the switching station, each intelligent switching unit is designed based on a high protection level, standardization and maintenance-free mode and used for accessing IO functions such as PT/CT/breaker position/switching-on-off control and the like, and is accessed to a power distribution edge server in a point-to-point mode by an IEC61850-SV/GOOSE protocol (SV interpolation synchronization can be realized in a point-to-point connection mode without an external clock), the power distribution edge servers communicate with each other through a GOOSE peer-to-peer communication network, can be accessed to a distribution network master station through an IEC104 protocol, and can also be accessed to maintenance tool software through the IEC61850-MMS protocol.
The implementation flow and the working principle of the distribution edge server in the distribution network system are shown in fig. 5.
Step S410: a set of power distribution edge server and a plurality of intelligent combination units are installed in each switch station, each intelligent combination unit is connected with the input position and the output control node of the PT/CT/breaker of each switch in a downward mode, and the intelligent combination units are connected with the process layer optical ports of the power distribution edge server in an upward mode through optical fibers.
Step S420: SCD files of the switch stations are configured, the transceiving connection of all function module Logic Devices (LD) of the power distribution edge servers and SV/GOOSE virtual terminals of all intelligent units is established, the transceiving connection of the GOOSE virtual terminals between the power distribution edge servers of adjacent switch stations is established, and then CID and CCD files of all devices are led out and downloaded to the corresponding devices respectively.
Step S430: after each intelligent combining unit and the power distribution edge server are powered on and operated, all functional modules are subjected to constant-value parameter setting and soft pressure plate switching by using all-station unified maintenance working software (such as IEC61850 client software), for example, the switch types (section switches, tie switches or demarcation switches), the adjacent relation matrixes, the intelligent distributed FA function for switching the section switches and the demarcation switch modules, the corresponding bus protection function or the spare power automatic switching function and the like are set.
Step S440: when the power distribution network normally operates, the power distribution edge server collects and calculates telemetering and telesignalling information of each interval through each intelligent combining unit and communicates with the distribution network master station.
Step S450: when the power distribution network fails, the corresponding software module of the power distribution edge server performs a fault processing flow, outputs a fault positioning result and a power supply recovery instruction, respectively sends a switch opening and closing command to the fault adjacent switch, and reports fault information of each interval to the distribution network master station.
Step S460: and after receiving the GOOSE instruction of the power distribution edge server, each intelligent combining unit executes the on-off operation of the switch to complete fault isolation and power supply recovery.
Fig. 6 illustrates a fault processing flow of a distribution edge server based on a centralized protection control system architecture after faults occur at different locations of a distribution network, and further illustrates the reliability redundancy of the distribution edge server for various fault processing. The solid switches are shown in the closed position and the open switches are shown in the open position. The switches 1 and 6 of the switch station 1 and the switch station 2 are section switches, the switches 2,3,4 and 5 are boundary switches, the switch 7 of the switch station 2 is a tie switch, and the distribution network shown in the figure is in an open-loop operation mode.
When a fault occurs at F1, the switch 1 of the switching station 1 detects an overcurrent, the switches 2,3,4,5 and 6 do not detect the overcurrent, all the intelligent distributed FA functions of the switches work cooperatively, the fault position is judged to be on a bus of the switching station 1 according to the overcurrent differential principle, instructions for cutting off the switches 1-6 are sent to the switching-on units 1-6 respectively, and the fault is isolated; meanwhile, the bus protection module of the switch station 1 sends an instruction for cutting off the switches 1-6 to the intelligent units 1-6 because the differential current meets the action condition, so that a double protection function is provided for bus faults; after the trouble is kept apart, switch 1~3 of switchyard 2 lose the electricity, and switch 6 of switchyard 1 sends "keep apart successfully" GOOSE signal to switchyard 2 to transmit interconnection switch 7, interconnection switch sends the instruction of closing a floodgate after detecting the unilateral and losing voltage, and the power supply of switch 1~3 of fast recovery switchyard 2.
When a fault occurs at F2, the switches 1 and 2 of the switching station 1 detect overcurrent, the switches 3,4,5 and 6 do not detect overcurrent, all the intelligent distributed FA functions of the switches work cooperatively, the fault position is judged to be on the boundary branch 2 of the switching station 1 according to the overcurrent differential principle, an instruction for cutting off the switches 2 is sent to the closing unit 2, and the fault is cut off; meanwhile, an overcurrent protection module of a boundary switch 2 of the switch station 1 meets the action condition, and also sends an instruction of cutting off the switch 2 to the intelligent unit 2, so that a dual protection function is provided for the fault of the boundary branch; after the fault is removed, because the fault is a boundary branch fault, a GOOSE signal of successful isolation is not sent, and other switches cannot lose voltage, the interconnection switch 7 of the switching station 2 does not need to be switched on.
When a fault occurs at F3, the switches 1 and 6 of the switch station 1 detect overcurrent, the switches 2,3,4 and 5 do not detect overcurrent, all the switches of the switch station 2 also do not detect overcurrent, all the switch intelligent distributed FA functions work in a cooperative mode, the fault position is judged to be on a connecting line between the switch station 1 and the switch station 2 according to the overcurrent differential principle, an instruction of cutting off the switch 6 of the switch station 1 and the switch 1 of the switch station 2 is sent to corresponding intelligent units respectively, and the fault is isolated; meanwhile, the line differential modules of the switch station 1 and the switch station 2 send out an instruction for cutting off the two switches because the differential current meets the action condition, and provide a duplicate protection function for the fault of the tie line; after the fault is isolated, the switches 2-3 of the switch station 2 lose power, the switch 1 of the switch station 2 sends a GOOSE signal of 'isolation success' to the interconnection switch 7, the interconnection switch sends a closing instruction after detecting single-side voltage loss, and power supply of the switches 2-3 of the switch station 2 is quickly recovered.
A schematic diagram of a maintenance tool software interface provided for a power distribution edge server is shown in fig. 6, and all functions in one switching station are realized by being concentrated in one power distribution edge server, so that real-time data and historical data can be checked according to logic equipment under a unified interface, a mode that a plurality of units need to be maintained by a conventional distributed DTU is avoided, operation and maintenance efficiency is improved, and especially fault recording can be performed by concentrating multi-interval information into a recording file and displaying the recording file according to a unified time scale, so that the efficiency of fault analysis can be improved.
The invention has the characteristics that:
1. the power distribution edge server is constructed by adopting an IEC61850 protocol pure digital scheme, the IO function is put down to a small intelligent unit, the equipment reliability is improved through hardware layering, and the fusion requirement of primary and secondary equipment is met;
2. the distribution edge server is constructed based on a centralized protection control system, realizes various FA functions and protection functions, has functional redundancy for the same fault, improves reliability, and meets the requirements of rapid isolation and power supply recovery for various types of faults.
3. By adopting a software function module based on big data processing and a topology description method, information interaction of each interval in the station is completed in the server, the method can adapt to application scenes of power distribution networks with different grid structures, communication means and fault types, and the speed and accuracy of fault positioning and fault isolation are improved.
4. A unified man-machine interface management mode is provided for a secondary system of the switch station, the efficiency of constant value setting, three-remote monitoring, SOE checking and wave recording analysis is improved, and operation and maintenance are greatly facilitated.
Claims (8)
1. A distribution edge server system based on a centralized protection control system architecture is characterized in that: the system comprises a core mainboard and a plurality of plug-ins; the core mainboard comprises two 64-bit multi-core CPUs and an FPGA; the FPGA is connected with the first CPU; the first CPU is connected with the second CPU; the plug-in components comprise 2-5 process layer optical port plug-in components, each process layer optical port plug-in component is provided with 6 groups of SFP optical ports, a 4DO plug-in component is used for outputting a main alarm and a main locking signal of the device, a 4DI plug-in component is used for overhauling a pressing plate, a remote local pressing plate and a reset signal are input, a station control layer network port plug-in component is used for connecting a distribution network main station, a local background or the device, a serial port plug-in component is used for connecting a distribution network main station or a lower computer, an LED management plug-in component is used for connecting debugging software, a liquid crystal display and an photoelectric IRIG-B code interface, and an LED plug-in component is used for displaying the running state of double CPUs and the switch position, overcurrent and action information of each interval of the switch station.
2. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the on-board communication interfaces among the chips comprise gigabit Ethernet, PCIe and Localbus, and each CPU is provided with EMMC, DDR3 and FLASH memories.
3. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the power distribution edge server system is designed based on functional modules defined by software, and all the functional modules correspond to one logic device in an IEC61850-ICD file; the voltage, current and switch position information of all intervals in a switch station are accessed through an optical port, and besides a single-interval protection, measurement and control, recloser type FA and metering function module of a conventional centralized DTU and an intelligent distributed FA function of a distributed DTU, a bus protection, backup power automatic switching, small current grounding line selection and line differential protection function module based on multi-interval information of the switch station are also built.
4. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the power distribution edge server system adopts IEC61850-SV/GOOSE protocol and ICD data modeling technology based and point-to-point synchronous communication between the small intelligent combination units of the distribution network server and the switches, and information synchronization and information exchange between the intervals in each station are carried out in the power distribution edge server.
5. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the distribution edge server system is characterized in that an intelligent combining unit is respectively installed at all switch intervals of a switch station, each intelligent combining unit is designed based on a high protection level and a standardized and maintenance-free mode and is used for accessing a PT (potential Transformer), a CT (Current Transformer), a circuit breaker position and an opening and closing control function, and is accessed to the distribution edge server in a point-to-point mode by an IEC61850-SV/GOOSE protocol, communication is carried out between the distribution edge servers through a GOOSE peer-to-peer communication network, a distribution network master station is accessed by an IEC104 protocol, or maintenance tool software is accessed by the IEC61850-MMS protocol.
6. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the distribution edge server system simultaneously uses an intelligent distributed FA module and a bus protection module to simultaneously position bus faults in the switch station; for dividing branch faults connected with the switching station, simultaneously using an intelligent distributed FA module and an overcurrent protection module of the dividing branch to simultaneously remove the faults; for the fault of the connecting line between the switch stations, a GOOSE peer-to-peer communication network is established between the power distribution edge servers through a process layer optical port or information interaction between adjacent switches between the stations is realized in a 5G wireless communication mode, so that an intelligent distributed FA function or a line differential protection function is realized.
7. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the distribution edge server system is realized by centralizing all functions in one switching station in one distribution edge server, real-time data and historical data are checked according to logic equipment under a unified interface, multi-interval information is centralized into one recording file during fault recording, and the multi-interval information is displayed according to unified time scales so as to improve the fault analysis efficiency.
8. A power distribution edge server system based on a centralized protection control system architecture according to claim 1, characterized in that: the implementation process of the power distribution edge server system in the distribution network system comprises the following steps:
step S410: a set of power distribution edge server and a plurality of intelligent combination units are installed in each switch station, each intelligent combination unit is connected with the PT, CT, breaker input position and output control node of each switch in a downward mode, and the intelligent combination units are connected with the process layer optical ports of the power distribution edge server in an upward mode through optical fibers;
step S420: configuring SCD files of the switch stations, establishing the transceiving connection of the logic equipment of each function module of the power distribution edge server and SV and GOOSE virtual terminals of each intelligent unit, and the transceiving connection of the GOOSE virtual terminals between the power distribution edge servers of adjacent switch stations, and then exporting CID and CCD files of each device to download to the corresponding devices respectively;
step S430: after each intelligent combining unit and the power distribution edge server are powered on and run, all functional modules are subjected to constant-value parameter setting and soft pressing plate switching by using the total-station unified maintenance work software;
step S440: when the power distribution network normally operates, the power distribution edge server collects and calculates telemetering and remote signaling information of each interval through each intelligent combining unit and communicates with a distribution network master station;
step S450: when the power distribution network fails, the corresponding functional module of the power distribution edge server performs a fault processing flow, outputs a fault positioning result and a power supply recovery instruction, respectively sends a switch opening and closing command to a fault adjacent switch, and reports each interval fault information to the distribution network master station;
step S460: and after receiving the GOOSE instruction of the power distribution edge server, each intelligent combining unit executes the on-off operation of the switch to complete fault isolation and power supply recovery.
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