CN114006804B - Distribution edge server system based on centralized protection control system architecture - Google Patents
Distribution edge server system based on centralized protection control system architecture Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
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- H—ELECTRICITY
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
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- H04L41/0677—Localisation of faults
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- H—ELECTRICITY
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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 main board and a plurality of plug-ins, wherein the core main board is connected with the plug-ins; the core main board 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 unit comprises 2-5 process layer optical port plug-in units, each with 6 groups of SFP optical ports, a 4DO plug-in signal output, a 4DI plug-in unit for signal plug-in, a station control layer network port plug-in unit for connecting with a distribution network master station, a local background or device, a serial port plug-in unit for connecting with a distribution network master station or a lower computer, an LED management plug-in unit and an LED plug-in unit for displaying the running state of a double CPU and the switch position, overcurrent and action information of each interval of a switch station; the method can be suitable for the application scenes of power distribution networks with different grid structures, communication means and fault types, and improves 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
The feeder automation (Feeder Automation, FA) technology is used for fault detection, fault isolation and power restoration after the power distribution network has faults, is a core function of a power distribution automation system, and mainly comprises a main station centralized type and an in-situ type. The master station centralized FA performs fault location by means of communication between the master station and each distribution network terminal, and has the defects of communication dependence, low location accuracy and low action speed; the in-situ FA is divided into recloser type, intelligent distributed type and relay protection type, and has the advantages of high action speed and strong adaptability, so that the in-situ FA is mainly completed by various distribution network terminals (station terminal DTU, feeder terminal FTU and the like), wherein the DTU is deployed in a switching station (comprising an switching station, a ring main unit, a power distribution room and the like), relates to measurement and control of a plurality of switches, and is divided into two types of centralized type and decentralized type for unifying interface and function configuration of DTU equipment of different manufacturers and meeting national network specifications of station terminals (Distribution Terminal Unit, DTU). The centralized DTU is equivalent to a conventional multi-interval device, the analog quantity and the switching quantity of all switches are connected to a plug-in device by hard wires, the centralized DTU is mainly matched with a main station to execute a centralized FA function, and when the centralized DTU is applied in a switching station, a protection measurement and control device (commonly called a watchdog) at each interval is usually required to be additionally installed to complete an on-site protection function; the distributed DTU is deployed in a mode of one common unit and a plurality of interval units, and the units need to communicate with each other through an external wiring by using a double recombination network of IEC61850-GOOSE and IEC104 protocols, and each interval unit is still a conventional single interval device. Both have the problems of lower reliability, insufficient functions, poor capability of adapting to topology change of the distribution network, difficult updating 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 distribution edge server system based on the centralized protection control system architecture is provided to improve the reliability, adaptability and maintenance upgrading convenience of feeder automation functions in the prior art.
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 main board and a plurality of plug-ins; the core main board 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 include 2~5 process layer optical port plug-in components, every piece takes 6 SFP optical ports of group, a 4DO to open the plug-in components and is used for device total alarm and total locking signal output, a 4DI opens the plug-in components and is used for examining and repairing the clamp plate, remote site clamp plate, return signal etc. and opens, a station accuse layer net mouth plug-in components are used for connecting 104 distribution network master station, local backstage or device, a serial port plug-in components are used for connecting distribution network master station or lower computer, a LED manages the plug-in components and is used for connecting debugging software, LCD and photoelectric IRIG-B sign indicating number interface, a LED plug-in components are used for showing two CPU running state and each spaced switch position of switch station, overcurrent and action information.
The on-board communication interface between the chips comprises gigabit Ethernet, PCIe and Localbus, and each CPU is configured with EMMC, DDR3 and FLASH memory.
The distribution edge server system is designed based on software defined function modules, and all the function modules correspond to one logic device in an IEC61850-ICD file; the voltage, current and switch position information of all intervals in one switching station are accessed through the optical port, and besides the single-interval protection, measurement and control, recloser type FA and metering function module of the conventional centralized DTU and the intelligent distributed FA function of the distributed DTU, the bus protection, spare power automatic switching, small current grounding line selection and line differential protection function module of the switching station based on multi-interval information are built.
The distribution edge server system adopts the IEC61850-SV/GOOSE protocol and ICD data modeling technology, and the point-to-point synchronous communication between the distribution network server and the small intelligent closing units of each switch, and the information synchronization and the information exchange between the intervals in each station are carried out inside the distribution edge server.
The distribution edge server system is provided with intelligent units at all switch intervals of the switch station, each intelligent unit is designed based on high protection level, standardization and maintenance-free modes and is used for accessing PT, CT, breaker position and switching-on/off control functions, the intelligent units are accessed to the distribution edge server in a point-to-point mode through IEC61850-SV/GOOSE protocol, communication is carried out among the distribution edge servers through a GOOSE peer-to-peer communication network, and the intelligent units are accessed to a distribution network master station through IEC104 protocol or access to maintenance tool software through IEC61850-MMS protocol.
The power distribution edge server system simultaneously positions bus faults in the switch station by using the intelligent distributed FA module and the bus protection module; for the fault of the demarcation branch connected with the switch station, simultaneously using the intelligent distributed FA module and the overcurrent protection module of the demarcation branch to cut off the fault; for the fault of the interconnecting lines between the switching stations, a GOOSE peer-to-peer communication network is established between the distribution edge servers through a process layer optical port or information interaction between adjacent side 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 a switch station in one distribution edge server, viewing real-time data and historical data according to logic equipment under a unified interface, centralizing multi-interval information into one wave recording file during fault wave recording, and displaying according to a unified time scale so as to improve fault analysis efficiency.
The implementation flow of the distribution edge server system in the distribution network system comprises the following steps:
Step S410: a set of distribution edge servers and a plurality of intelligent combination units are arranged in each switch station, and each intelligent combination unit is connected to PT, CT, breaker input positions and output control nodes of each switch in a lower mode, and is connected to a process layer light port of the distribution edge server in an upper mode through optical fibers;
Step S420: configuring SCD files of switch stations, establishing SV and GOOSE virtual terminal transceiving connection of each functional module logic device of each power distribution edge server and each intelligent combination unit, and GOOSE virtual terminal transceiving connection between power distribution edge servers of adjacent switch stations, and then exporting CID and CCD files of each device and downloading the CID and CCD files to the corresponding devices respectively;
Step S430: after each intelligent combination unit and the power distribution edge server are electrified and run, fixed value parameter setting and soft pressing plate switching are carried out on each functional module by using unified maintenance work software of the whole station;
Step S440: when the distribution network normally operates, the distribution edge server collects and calculates remote measurement and remote signaling information of each interval through each intelligent combination unit and communicates with a distribution network main station;
Step S450: when the distribution network breaks down, the corresponding functional module of the distribution edge server carries out fault processing flow, outputs a fault positioning result and a power supply restoration instruction, respectively sends a switch opening and closing command to a fault adjacent switch, and reports each interval fault information to a distribution network master station;
step S460: and after each intelligent combination unit receives the GOOSE instruction of the power distribution edge server, the intelligent combination unit executes the switching on/off operation to complete fault isolation and power supply recovery.
The invention has the beneficial effects that:
The centralized protection Control System (Centralized Protection & Control System, CPCS) is a substation total station protection Control System realized on a high-performance software and hardware platform based on the IEC61850 communication standard, and the main equipment comprises a centralized protection Control device and intelligent units at intervals, wherein the intelligent units are provided with all interval information of an integrated total station, each interval protection Control function is realized in a software module mode of edge calculation, the communication between the function modules of a spacer layer can be realized through a shared memory, and the number of the equipment of the spacer layer can be greatly reduced.
The invention adopts a distribution edge server system based on a centralized protection control system structure, can completely replace the functions of the existing DTU and solve the problems of the existing DTU, and comprises the following steps:
1. the hardware classification and the software-hardware separation of the equipment are realized, and the service life of the hardware and the richness and the expandability of the software function are improved.
2. The distribution edge server can synchronously collect all interval information in the switching station, and can construct high-precision fault positioning according to synchronous big data, so that communication between interval units in the station is avoided, the speed and accuracy of fault processing in the station are improved, and the distribution edge server has strong adaptability to fault processing of inter-station connecting lines.
3. The invention is based on the functional module of software definition and edge calculation, can freely expand various functions, and meets the requirement of continuous development of the power distribution network.
4. And a plurality of devices in the station are not required to be maintained, unified maintenance tool software or background software is provided, and the maintenance and accident analysis are convenient.
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 a 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;
fig. 5 depicts a flow chart of the operational principle of the distribution edge server.
Fig. 6 is a functional diagram of a distribution edge server at the time of a distribution network failure.
Fig. 7 is a schematic diagram of a maintenance tool interface for a 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 specific embodiments of the present invention is given with reference to the accompanying drawings. It should be understood that the detailed description is presented herein only to provide a more thorough and complete understanding of the invention, and is not intended to limit the scope of the invention.
The utility model provides a distribution edge server based on centralized protection control system framework, its characterized in that, distribution edge server comprises core mainboard and a plurality of plug-ins, as shown in fig. 2, compares centralized DTU and decentralized DTU's hardware structure (as shown in fig. 1), and its biggest difference is cancelling each interval AI analog quantity input plug-in components and DIO switching value input/output plug-in components, and adopts the substitution of pure digital formula optical port plug-in components to but all interval AI and DIO digital quantity information of access switching station.
The core main board mainly comprises two high-performance 64-bit multi-core CPUs and a large-capacity FPGA, wherein an on-board communication interface between the chips comprises 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 components include 2-5 process layer optical port plug-ins (each with 6 groups of SFP optical ports), a 4DO plug-in component (for device total alarm and total locking signal output), a 4DI plug-in component (for overhaul pressing plate, remote on-site pressing plate, reset signal and the like), a station control layer network port plug-in component (for connecting 104 a network distribution master station, a local background or other devices), a serial port plug-in component (for connecting 101 a network distribution master station or other lower computers and comprising a 4G/5G wireless communication module), an LED management plug-in component (for connecting debugging software, a liquid crystal display and an optical/electrical IRIG-B code interface), an LED plug-in component (for displaying information such as switch positions, overcurrent and actions of each interval of a switch station), a power supply plug-in component (comprising a dual power supply module and capable of outputting DC24V to supply power to other devices).
The software system of the distribution edge server is designed based on the software-defined functional modules, all the functional modules correspond to one Logic Device (LD) in an IEC61850-ICD file, the software block diagram is shown in figure 3, and information such as voltage, current and switch positions of all intervals in one switch station are accessed through at most 30 optical ports, so that the functional modules such as single-interval protection, measurement and control, recloser type FA, metering and the like of a conventional centralized DTU and intelligent distributed FA functions of the distributed DTU can be built, the functional modules such as bus protection, spare power automatic switching, small-current grounding selection, line differential protection and the like of the switch station based on multi-interval information can be built, point-to-point synchronous communication between the switch station and small-sized combined units of each switch is adopted, the information synchronization and information exchange between the intervals in each station can be performed in the distribution edge server, the functional barriers caused by external wiring faults are avoided, the functional barriers caused by the external wiring faults are avoided, the functional barriers are not required to be increased, the functional faults are comprehensively realized, and the comprehensive positioning functions are realized. For example, for bus faults within a switchyard, the intelligent distributed FA module and the bus protection module may be used simultaneously for simultaneous localization; for the fault of the demarcation branch connected with the switch station, the intelligent distributed FA module and the overcurrent protection module of the demarcation branch can be used simultaneously to cut off the fault; and for the fault of the interconnecting line between the switch stations, a GOOSE peer-to-peer communication network (also can be realized by a 5G wireless communication mode) can be established between the distribution edge servers through a process layer optical port, so that the information interaction between the adjacent side switches between the stations is realized, and the intelligent distributed FA function or the line differential protection function is realized.
A device deployment block diagram of the distribution edge servers of two adjacent switchyard of a distribution network is shown in fig. 4. The intelligent switching system comprises a power distribution edge server, a power distribution network master station, a power distribution edge server and a power distribution edge server, wherein all switch intervals of the power distribution edge server are respectively provided with a small intelligent unit, each intelligent unit is designed based on a high protection level, standardized and maintenance-free mode and is used for accessing IO functions such as PT/CT/breaker position/switching-on/switching-off control and the like, the intelligent units are accessed to the power distribution edge server in a point-to-point mode through an IEC61850-SV/GOOSE protocol (the point-to-point connection mode can realize SV interpolation synchronization without an external clock), the power distribution edge servers are communicated through a GOOSE peer-to-peer communication network, and the intelligent units can be accessed to the power distribution network master station through an IEC104 protocol and also can be accessed to maintenance tool software through an 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 distribution edge server and a plurality of intelligent combination units are installed in each switch station, and each intelligent combination unit is connected to the PT/CT/breaker input position and output control node of each switch in a lower mode, and is connected to a process layer light port of the distribution edge server in an upper mode through optical fibers.
Step S420: and configuring SCD files of the switch stations, establishing the receiving and transmitting connection of each functional module Logic Device (LD) of the distribution edge server and the SV/GOOSE virtual terminal of each intelligent combination unit, receiving and transmitting connection of the GOOSE virtual terminal between the distribution edge servers of the adjacent switch stations, and then exporting CID and CCD files of each device and downloading the CID and CCD files to the corresponding devices respectively.
Step S430: after each intelligent combination unit and the distribution edge server are powered on and run, fixed value parameter setting and soft pressing plate switching are carried out on each functional module by using unified maintenance work software (such as IEC61850 client software), for example, a switch type (a sectionalizer switch, a tie switch or a demarcation switch), an adjacent relation matrix, an intelligent distributed FA function of inputting the sectionalizer switch and the demarcation switch module, a corresponding bus protection function or a spare power automatic switching function are input, and the like.
Step S440: and when the distribution network normally operates, the distribution edge server collects and calculates remote measurement and remote signaling information of each interval through each intelligent combination unit and communicates with the distribution network main station.
Step S450: when the distribution network breaks down, the corresponding software module of the distribution edge server carries out fault processing flow, outputs fault positioning results and power restoration instructions, respectively sends switch opening and closing commands to the fault adjacent switches, and reports fault information of each interval to the distribution network master station.
Step S460: and after each intelligent combination unit receives the GOOSE instruction of the power distribution edge server, the intelligent combination unit executes the switching on/off operation to complete fault isolation and power supply recovery.
Fig. 6 illustrates a fault handling flow of a distribution edge server based on a centralized protection control system architecture after a fault occurs at a different location of the distribution network, and further illustrates reliability redundancy of the distribution edge server for handling various faults. The solid switches in the figure are shown in the closed position and the open switches are shown in the open position. The 1,6 switches of the switching station 1 and the switching station 2 are sectionalized switches, the 2,3,4,5 switches are demarcation switches, the 7 switch of the switching station 2 is a contact switch, and the distribution network shown in the figure is in an open-loop operation mode.
When the fault occurs at the F1 position, the switch 1 of the switch station 1 detects 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 switch station 1 according to an overcurrent differential principle, an instruction for cutting off the switches 1-6 is sent to the switching-on units 1-6 respectively, and the fault is isolated; meanwhile, the bus protection module of the switch station 1 also sends a command of cutting off the switch 1-6 to the intelligent unit 1-6 because the differential current meets the action condition, and a double protection function is provided for bus faults; after the fault is isolated, the switches 1-3 of the switch station 2 are powered off, the switch 6 of the switch station 1 sends a GOOSE signal of 'successful isolation' to the switch station 2 and transmits the GOOSE signal to the interconnection switch 7, and the interconnection switch sends a closing instruction after detecting single-side voltage loss, so that power supply of the switches 1-3 of the switch station 2 is quickly restored.
When the F2 position fails, the switches 1 and 2 of the switch station 1 detect overcurrent, the switches 3,4,5 and 6 do not detect overcurrent, all intelligent distributed FA functions of the switches work cooperatively, the fault position is judged to be on the demarcation branch 2 of the switch station 1 according to the overcurrent differential principle, an instruction for cutting off the switch 2 is sent to the closing unit 2 respectively, and the fault is cut off; meanwhile, the overcurrent protection module of the demarcation switch 2 of the switch station 1 meets the action condition, and also sends out an instruction for cutting off the switch 2 to the intelligent closing unit 2 to provide a double protection function for the fault of the demarcation branch; after the fault is removed, as the fault is a demarcation branch fault, a GOOSE signal of 'successful isolation' is not sent, and other switches cannot lose voltage, so that the interconnecting switch 7 of the switching station 2 does not need to be switched on.
When the fault occurs at the F3 position, 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 do not detect overcurrent, all the intelligent distributed FA functions of the switches work cooperatively, the fault position is judged to be on a connecting line between the switch station 1 and the switch station 2 according to an overcurrent differential principle, an instruction for cutting off the switch 6 of the switch station 1 and the switch 1 of the switch station 2 is sent to corresponding intelligent combination units respectively, and the fault is isolated; meanwhile, the line differential modules of the switch station 1 and the switch station 2 also send out instructions for cutting off the two switches as the differential current meets the action condition, thereby providing a double protection function for the fault of the connecting line; after the fault is isolated, the switches 2-3 of the switch station 2 are powered off, the switch 1 of the switch station 2 sends a GOOSE signal of 'successful isolation' to the interconnection switch 7, and the interconnection switch sends a closing instruction after detecting single-side voltage loss, so that the power supply of the switches 2-3 of the switch station 2 is quickly recovered.
The maintenance tool software interface schematic diagram provided for the distribution edge server is shown in fig. 6, and all functions in one switch station are concentrated in one 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 are required to be maintained by a conventional distributed DTU is avoided, the operation and maintenance efficiency is improved, particularly, fault recording can concentrate multiple interval information into one recording file and display the information according to a unified time scale, and the efficiency of fault analysis can be improved.
The invention is characterized in that:
1. The power distribution edge server adopts IEC61850 protocol pure digital scheme construction, the IO function is lowered to the small intelligent unit, the reliability of the equipment is improved through hardware layering, and the fusion requirement of secondary equipment is met;
2. The distribution edge server is based on a centralized protection control system structure, realizes various FA functions and protection functions, has functional redundancy on the same fault, improves reliability, and meets the requirements of quick isolation and power restoration of various faults.
3. By adopting the software functional module based on big data processing and the topology description method, the information interaction of each interval in the station is completed in the server, so that the method can adapt to the 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. The unified man-machine interface management mode is provided for the secondary system of the switching station, so that the efficiency of fixed value setting, three-remote monitoring, SOE checking and wave recording analysis is improved, and the operation and maintenance are greatly facilitated.
Claims (7)
1. A power distribution edge server system based on a centralized protection control system architecture, characterized in that: the device comprises a core main board and a plurality of plug-ins; the core main board 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 include 2~5 process layer optical port plug-in components, every piece takes 6 SFP optical ports of group, a 4DO to open the plug-in components and is used for device total alarm and total locking signal output, a 4DI opens the plug-in components and is used for examining and repairing the clamp plate, remote site clamp plate and return signal to open, a station accuse layer net gapping plug-in components are used for connecting and join in marriage net master station, local backstage or device, a serial port plug-in components are used for connecting and join in marriage net master station or lower computer, a LED management plug-in components are used for connecting debugging software, LCD and photoelectric IRIG-B sign indicating number interface, a LED plug-in components are used for showing two CPU running state and each spaced switch position of switching station, overcurrent and action information.
2. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the on-board communication interface between the two high-performance 64-bit multi-core CPUs and the FPGA comprises gigabit Ethernet, PCIe and Localbus, and each CPU is configured with EMMC, DDR3 and FLASH memory.
3. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the distribution edge server system is designed based on software defined function modules, and all the function modules correspond to one logic device in an IEC61850-ICD file; the voltage, current and switch position information of all intervals in one switching station are accessed through the optical port, and besides the single-interval protection, measurement and control, recloser type FA and metering function module of the conventional centralized DTU and the intelligent distributed FA function of the distributed DTU, the bus protection, spare power automatic switching, small current grounding line selection and line differential protection function module of the switching station based on multi-interval information are built.
4. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the distribution edge server system is provided with intelligent units at all switch intervals of the switch station, each intelligent unit is designed based on high protection level, standardization and maintenance-free modes and is used for accessing PT, CT, breaker position and switching-on/off control functions, the intelligent units are accessed to the distribution edge server in a point-to-point mode through IEC61850-SV/GOOSE protocol, communication is carried out among the distribution edge servers through a GOOSE peer-to-peer communication network, and the intelligent units are accessed to a distribution network master station through IEC104 protocol or access to maintenance tool software through IEC61850-MMS protocol.
5. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the power distribution edge server system simultaneously positions bus faults in the switch station by using the intelligent distributed FA module and the bus protection module; for the fault of the demarcation branch connected with the switch station, simultaneously using the intelligent distributed FA module and the overcurrent protection module of the demarcation branch to cut off the fault; for the fault of the interconnecting lines between the switching stations, a GOOSE peer-to-peer communication network is established between the distribution edge servers through a process layer optical port or information interaction between adjacent side 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.
6. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the distribution edge server system is realized by centralizing all functions in a switch station in one distribution edge server, viewing real-time data and historical data according to logic equipment under a unified interface, centralizing multi-interval information into one wave recording file during fault wave recording, and displaying according to a unified time scale so as to improve fault analysis efficiency.
7. A power distribution edge server system based on a centralized protection control system architecture as set forth in claim 1, wherein: the implementation flow of the distribution edge server system in the distribution network system comprises the following steps:
Step S410: a set of distribution edge servers and a plurality of intelligent combination units are arranged in each switch station, and each intelligent combination unit is connected to PT, CT, breaker input positions and output control nodes of each switch in a lower mode, and is connected to a process layer light port of the distribution edge server in an upper mode through optical fibers;
Step S420: configuring SCD files of switch stations, establishing SV and GOOSE virtual terminal transceiving connection of each functional module logic device of each power distribution edge server and each intelligent combination unit, and GOOSE virtual terminal transceiving connection between power distribution edge servers of adjacent switch stations, and then exporting CID and CCD files of each device and downloading the CID and CCD files to the corresponding devices respectively;
Step S430: after each intelligent combination unit and the power distribution edge server are electrified and run, fixed value parameter setting and soft pressing plate switching are carried out on each functional module by using unified maintenance work software of the whole station;
Step S440: when the distribution network normally operates, the distribution edge server collects and calculates remote measurement and remote signaling information of each interval through each intelligent combination unit and communicates with a distribution network main station;
Step S450: when the distribution network breaks down, the corresponding functional module of the distribution edge server carries out fault processing flow, outputs a fault positioning result and a power supply restoration instruction, respectively sends a switch opening and closing command to a fault adjacent switch, and reports each interval fault information to a distribution network master station;
step S460: and after each intelligent combination unit receives the GOOSE instruction of the power distribution edge server, the intelligent combination unit executes the switching on/off operation to complete fault isolation and power supply recovery.
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