CN114189045A - Intelligent distributed FA communication fault-tolerant control method based on wireless communication - Google Patents

Intelligent distributed FA communication fault-tolerant control method based on wireless communication Download PDF

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Publication number
CN114189045A
CN114189045A CN202111350768.8A CN202111350768A CN114189045A CN 114189045 A CN114189045 A CN 114189045A CN 202111350768 A CN202111350768 A CN 202111350768A CN 114189045 A CN114189045 A CN 114189045A
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terminal
intelligent distributed
communication
fault
adjacent
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杨云萍
张春辉
马明
陈黎玲
沈航
张弓帅
李邦源
白建林
王明
刘旭
陈君
杨金
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Yuxi Power Supply Bureau of Yunnan Power Grid Co Ltd
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Yuxi Power Supply Bureau of Yunnan Power Grid Co Ltd
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Priority to CN202111350768.8A priority Critical patent/CN114189045A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

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  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)

Abstract

The invention relates to an intelligent distributed FA communication fault-tolerant control method based on wireless communication, and belongs to the technical field of feeder automation. Acquiring parameters of a self terminal when an intelligent distributed FA terminal is initialized, acquiring parameters of adjacent terminals through transverse communication, and establishing an intelligent distributed FA topology; when the switch open-close position changes, the corresponding topology can be built in a self-adaptive mode. After the intelligent distributed FA terminals are initialized to form topology, the parameters of the upstream and downstream terminals are subjected to override interaction, so that each intelligent distributed FA terminal stores the parameters of adjacent override terminals. Under the condition of wireless communication, when terminal communication fails, the intelligent distributed FA fault-tolerant communication mechanism is started to isolate a communication abnormal terminal, and an override terminal topology is formed. The invention can reduce the power failure time and save the number of households in power failure, thereby further improving the power supply reliability of the distribution line fault and being easy to popularize and apply.

Description

Intelligent distributed FA communication fault-tolerant control method based on wireless communication
Technical Field
The invention belongs to the technical field of Feeder Automation (FA), and particularly relates to an intelligent distributed FA communication fault-tolerant control method based on wireless communication.
Background
Feeder automation is an important technical means for improving the power supply reliability of a power distribution network, and in the aspect of protection of medium-voltage power distribution networks at home and abroad, feeder automation modes comprise three modes, namely in-situ feeder automation, master station centralized FA and intelligent distributed FA:
1. the on-site feeder automation mode comprises a voltage time mode, a voltage current mode and the like, fault location and isolation are realized by means of line voltage and current, no communication exists between line equipment, and a feeder automation function is realized by multiple times of superposition of an outlet switch of a transformer substation, so that the fault processing and power supply recovery speed is low, the impact on a system and a user is large, and in addition, on a multi-power-supply multi-branch distribution line, the fault isolation range is easily expanded due to the difficulty in time parameter setting.
2. The centralized FA of the main station is a feeder automation technology realized by the main station, the field power distribution terminal collects fault current information and transmits the fault current information to the main station, and the main station performs fault positioning, isolation and non-fault area restoration power supply according to the power distribution network topology and the collected fault information. Because the master station needs all distribution line topologies, the master station topology is frequently updated when the distribution network is transformed, so that the feeder automation model of the distribution master station is always changed, and the field implementation is difficult.
3. The intelligent distributed feeder automation does not need the control of a power distribution main station or a substation, and through a peer-to-peer communication technology among protection devices, when a power distribution network has a fault, the protection devices are used for automatically acquiring and processing measurement and control information of local sites and other related sites, carrying out protection control decision and directly sending a tripping command to a controlled switch to complete the fault isolation and non-fault area power supply recovery of a power distribution network line. The power distribution network line fault processing method is high in speed, the power distribution network power failure time can be greatly reduced, and the increasing demand of social and economic development on power supply reliability is met. However, the peer-to-peer communication of the intelligent distributed FA has high requirements on communication media, and currently, optical fiber communication is mainly adopted, but the time cost, the labor cost and the material cost required by laying a large number of optical cables are high, and the peer-to-peer communication is difficult to implement for power distribution network lines in old cities, old line reconstruction and remote areas. The wireless communication networking mode is flexible, the implementation cost is low, the intelligent distributed FA protection technology can be realized in the coverage area of the wireless base station, but compared with optical fiber communication, the communication reliability is low, abnormal communication conditions are easy to occur, and the intelligent distributed FA is difficult to use on site.
In conclusion, the intelligent distributed FA based on wireless communication has the advantages of flexible networking mode, low implementation cost and wide application range, is a new direction for the protection and development of the power distribution network, and solves the problem of communication reliability to promote the intelligent distributed FA based on wireless communication.
Disclosure of Invention
Under the current wireless communication condition, after the intelligent distributed FA terminal has communication abnormity, the intelligent distributed FA line full-line locking mode is usually adopted to ensure that the device does not operate reliably, or the full-line is switched to the voltage time mode, and the isolation and recovery of a fault line are realized by adopting a feeder automation technology without communication.
Compared with optical fiber communication, wireless communication has unstable communication quality and is easy to cause abnormal communication, so that the intelligent distributed FA cannot be well applied, and a lot of fields which are put into the intelligent distributed FA cannot be finally put into use.
Therefore, the invention provides the intelligent distributed FA communication fault-tolerant method based on the wireless communication, which is used for specially processing the abnormity of the intelligent distributed FA communication of the wireless communication, thereby realizing the use of the intelligent distributed FA, fundamentally improving the practicability of the intelligent distributed FA, expanding the application of the intelligent distributed FA and further improving the power supply reliability.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an intelligent distributed FA communication fault-tolerant control method based on wireless communication comprises the following steps:
the intelligent distributed FA terminal acquires the terminal parameters of the intelligent distributed FA terminal, transversely communicates with the adjacent intelligent distributed FA terminal, and acquires the adjacent terminal parameters, so that the line topology establishment of the intelligent distributed FA terminal is realized;
each intelligent distributed FA terminal acquires parameters of an upstream intelligent distributed FA terminal thereof, and then sends the parameters of the upstream intelligent distributed FA terminal thereof as override terminal parameters to the adjacent intelligent distributed FA terminal for storage through transverse communication with the adjacent intelligent distributed FA terminal;
after the intelligent distributed FA terminal detects the communication interruption of the adjacent terminal, inquiring the override terminal parameter of the adjacent terminal, communicating with the override terminal according to the IP in the override terminal parameter, updating the topology information, sending the latest topology link message to the override terminal, replying confirmation after the override terminal receives the latest topology message, updating the topology information of the override terminal and the adjacent terminal information, and simultaneously, reversely carrying out topology link interaction with the source terminal by the override terminal, thereby realizing the updating of the topology information of the whole line;
when a line fault occurs at a communication interruption position, the intelligent distributed FA terminal carries out fault information interaction with an adjacent terminal according to a new line topology, judges a fault point and carries out fault isolation.
Further, preferably, the intelligent distributed FA terminal learns the terminal parameters thereof through an FA parameter model; and after the intelligent distributed FA terminal transversely communicates with the adjacent intelligent distributed FA terminal, analyzing the intelligent distributed FA terminal to obtain the parameters of the adjacent intelligent distributed FA terminal.
Further, preferably, the terminal parameter includes a terminal IP, a corresponding switch ID, and an ID of a node on both sides of the corresponding switch.
Further, preferably, when the line is normally operated, the intelligent distributed FA terminal calculates the communication quality Q by sending a message to an adjacent terminal and receiving a response message;
Q＝N·K (1)
wherein, N is the number of times of receiving the response of the topology message in the previous time window, and K is the sensitivity parameter of the communication quality; and when Q is less than 0.5 or more than 0.9, dynamically updating the message transmission interval time T: if Q is>0.9, T is reduced by 10%, if Q<0.5, T is amplified by 10%; when T is greater than the maximum waiting time TmaxJudging that the communication interruption occurs in the switch, and when T is less than the minimum waiting time TminAnd setting T as the minimum value.
Further, it is preferable that K be 0.1; setting 10 messages in a time window for sending;
further, it is preferable that, when the line fails, the intelligent distributed FA terminal sends an inquiry to the adjacent terminal according to the time T, which is greater than the time TmaxAnd if the response message is not received, judging that the adjacent terminal has communication fault.
In the invention, the intelligent distributed FA terminal obtains the parameters of the terminal when initializing, obtains the parameters of the adjacent terminal through transverse communication and establishes the intelligent distributed FA topology; when the switch open-close position changes, the corresponding topology can be built in a self-adaptive mode. After the intelligent distributed FA terminals are initialized to form topology, the parameters of the upstream and downstream terminals are subjected to override interaction, so that each intelligent distributed FA terminal stores the parameters of adjacent override terminals. Under the condition of wireless communication, when terminal communication fails, the intelligent distributed FA fault-tolerant communication mechanism is started to isolate a communication abnormal terminal, and an override terminal topology is formed.
Compared with the prior art, the invention has the beneficial effects that:
when communication is abnormal, the traditional intelligent distributed processing scheme is of a full-line blocking type or a voltage time type. Under the mode of whole line shutting, line fault takes place, then intelligent distributed FA does not handle, leads to transformer substation's outlet switch tripping operation to lead to whole distribution lines to have a power failure, need rely on the manual work to carry out fault location and isolation. Under the mode of voltage time type, the circuit fault takes place, the transformer substation outlet switch trips, and distribution lines switch-on in proper order, closes transformer substation outlet switch trips again after the fault point, and the preceding stage switch of fault point blocks and closes the floodgate, and the distribution lines switch-on in proper order accomplishes the fault isolation, needs artifical combined floodgate to resume non-trouble regional power supply. The voltage time type needs the switch to be switched on and off for many times, and the circuit stops and recovers electricity for many times, so that the equipment loss on the circuit is large.
After the communication fault-tolerant method is adopted, when a line fault occurs at a communication abnormal position, the adjacent terminals carry out fault information interaction, a fault point is judged, the adjacent terminals trip out to finish fault area isolation, compared with a normal communication state, a fault area is expanded, and the minimum fault area isolation in the shortest time of FA is still finished. Compared with the full-line locking, the power failure range is reduced, compared with the voltage time type, the power failure time is shortened, and the number of times of switching actions is reduced.
When a line fault occurs at a non-communication abnormal position, the intelligent distributed FA carries out fault isolation and recovery according to the original fault processing logic, and the fault processing effect is the same as that of a normal communication state. Compared with the full-line locking, the power failure range is reduced, compared with the voltage time type, the power failure time is shortened, and the number of times of switching actions is reduced.
Based on the above, when a certain distribution line in China has a fault, after the intelligent distributed FA based on wireless communication is calculated and adopted to be put into operation, the whole process from fault line positioning and isolation to non-fault line power supply recovery is only 10 seconds, manual intervention is not needed, and the number of consumed households is 0.347 hours per household. If the full-line locking mode is adopted, a controller analyzes and positions a fault point, and quickly remotely controls, isolates and supplies power, the whole process takes about 16.8 minutes, and the number of consumed households is 35 hours. If the traditional voltage time mode is adopted, 2.6 minutes are needed for fault finding and back-end line isolation and power restoration, and the number of households is 5.417 hours per household during power failure. Therefore, compared with the full-line locking mode, the power-off time is saved by 0.2772 hours, the number of the residents is saved by 34.653, the human resources are saved by 2 people, and the efficiency is improved by 100.8 times; compared with a voltage time mode, the power failure time is saved by 0.0433 hour, the number of the households is saved by 5.417 hours, the manpower resource is saved by 2 persons, and the efficiency is improved by 15.6 times. According to the fault processing and analyzing result, the invention can shorten the power failure time and save the number of users in power failure, thereby further improving the power supply reliability of the distribution line fault and being easy to popularize and apply.
Drawings
FIG. 1 is a flow chart of topology establishment;
FIG. 2 is a flowchart of topology reconstruction in case of communication anomaly;
FIG. 3 is a diagram of an intelligent distributed FA circuit topology;
FIG. 4 is an exemplary diagram of a line communication fault;
fig. 5 is a diagram illustrating a line fault.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The materials or equipment used are not indicated by manufacturers, and all are conventional products available by purchase.
An intelligent distributed FA communication fault-tolerant control method based on wireless communication comprises the following steps:
the intelligent distributed FA terminal acquires the terminal parameters of the intelligent distributed FA terminal, transversely communicates with the adjacent intelligent distributed FA terminal, and acquires the adjacent terminal parameters, so that the line topology establishment of the intelligent distributed FA terminal is realized;
each intelligent distributed FA terminal acquires parameters of an upstream intelligent distributed FA terminal thereof, and then sends the parameters of the upstream intelligent distributed FA terminal thereof as override terminal parameters to the adjacent intelligent distributed FA terminal for storage through transverse communication with the adjacent intelligent distributed FA terminal;
after the intelligent distributed FA terminal detects the communication interruption of the adjacent terminal, inquiring the override terminal parameter of the adjacent terminal, communicating with the override terminal according to the IP in the override terminal parameter, updating the topology information, sending the latest topology link message to the override terminal, replying confirmation after the override terminal receives the latest topology message, updating the topology information of the override terminal and the adjacent terminal information, and simultaneously, reversely carrying out topology link interaction with the source terminal by the override terminal, thereby realizing the updating of the topology information of the whole line;
when a line fault occurs at a communication interruption position, the intelligent distributed FA terminal carries out fault information interaction with an adjacent terminal according to a new line topology, judges a fault point and carries out fault isolation.
Preferably, the intelligent distributed FA terminal obtains the terminal parameters through an FA parameter model; and after the intelligent distributed FA terminal transversely communicates with the adjacent intelligent distributed FA terminal, analyzing the intelligent distributed FA terminal to obtain the parameters of the adjacent intelligent distributed FA terminal.
Preferably, the terminal parameters include a terminal IP, a corresponding switch ID, and IDs of nodes on two sides of the corresponding switch.
Preferably, when the line operates normally, the intelligent distributed FA terminal calculates the communication quality Q by sending a message to an adjacent terminal and receiving a response message;
Q＝N·K (1)
wherein N is the number of times of receiving the response of the topology message in the previous time window, and K is the communication qualityA sensitivity level parameter; and when Q is less than 0.5 or more than 0.9, dynamically updating the message transmission interval time T: if Q is>0.9, T is reduced by 10%, if Q<0.5, T is amplified by 10%; when T is greater than the maximum waiting time TmaxJudging that the communication interruption occurs in the switch, and when T is less than the minimum waiting time TminAnd setting T as the minimum value.
Preferably, K is 0.1; setting 10 messages in a time window for sending;
preferably, when the line fails, the intelligent distributed FA terminal sends an inquiry to the adjacent terminal according to the time T, wherein the inquiry is greater than the time TmaxAnd if the response message is not received, judging that the adjacent terminal has communication fault.
When the line normally runs, the intelligent distributed FA terminal stores the information of the adjacent override terminal, and when one intelligent distributed terminal is abnormal in communication, the adjacent terminal isolates the intelligent distributed terminal in a communication way, so that the fault isolation area at the abnormal communication position is enlarged, and the fault-tolerant operation of the intelligent distributed FA communication is ensured, thereby improving the practicability of the intelligent distributed FA based on wireless communication.
(1) And establishing intelligent distributed FA line override parameter interaction. The intelligent distributed FA terminal obtains the parameters of the terminal through an FA parameter model, analyzes the parameter model file after the intelligent distributed FA terminal is initialized, transversely communicates with the adjacent terminal, and obtains the parameters of the adjacent terminal, so that the line topology establishment of the intelligent distributed FA is realized. Note: the FA parametric model is prior art.
When the intelligent distributed FA circuit has switch on-off change, so that the interconnection switch of the circuit is changed, the intelligent distributed FA terminal can adaptively establish a new operation topology in real time. Wherein the terminal parameters include: a terminal IP, a corresponding switch ID, and nodes ID at two sides of the corresponding switch, as shown in FIG. 1.
In the line operation process, the intelligent distributed FA terminal sends the parameters of the upstream terminal to the downstream terminal thereof and simultaneously sends the parameters of the downstream terminal to the upstream terminal thereof, thereby realizing the override interaction of the parameters of the upstream terminal and the downstream terminal, and each intelligent distributed FA terminal stores the parameters of adjacent override terminals. Wherein the override terminal parameters include: terminal IP, corresponding switch ID, and ID of nodes at two sides of corresponding switch.
(2) And (3) an intelligent distributed FA fault-tolerant communication mechanism. When one intelligent distributed FA terminal is abnormal in communication, the terminal starts a line intelligent distributed FA fault-tolerant communication mechanism. After the intelligent distributed FA terminal detects the communication interruption of the adjacent terminal, the intelligent distributed FA terminal immediately inquires the override terminal parameter of the abnormal terminal, communicates with the override terminal according to the IP address of the override terminal, updates the topology information of the intelligent distributed FA terminal, sends the latest topology link message to the override terminal, replies confirmation after the override terminal receives the latest topology message, updates the topology structure and the adjacent information of the intelligent distributed FA terminal, and simultaneously carries out topology link interaction with the source terminal in a reverse direction, thereby realizing the update of the topology information of the whole line. Therefore, the communication abnormal terminal is crossed, adjacent terminals on two sides of the communication abnormal terminal realize cross-level communication, the communication abnormal terminal is isolated from the line topology, a new network topology is formed, and the normal operation of the line intelligent distributed FA is ensured. The processing flow of the override terminal communication after the communication failure is shown in fig. 2.
When a line fault occurs at the communication abnormal position, the adjacent terminals carry out fault information interaction, a fault point is judged, the adjacent terminals trip to finish fault area isolation, compared with a normal communication state, the fault area is expanded, and the minimum time and minimum fault range isolation of FA is still finished. Compared with the full-line locking, the power failure range is reduced, compared with the voltage time type, the power failure time is shortened, and the number of times of switching actions is reduced. When a line fault occurs at a non-communication abnormal position, the intelligent distributed FA carries out fault isolation and recovery according to the original fault processing logic, and the fault processing effect is the same as that of a normal communication state. Compared with the full-line locking, the power failure range is reduced, compared with the voltage time type, the power failure time is shortened, and the number of times of switching actions is reduced.
(3) An intelligent distributed FA wireless communication time delay self-adjusting technology. When the line normally runs, the intelligent distributed FA terminal evaluates the communication quality Q of each adjacent terminal through the time slots for sending messages to the adjacent terminals and receiving response messages, and the calculation method of the communication quality Q is as follows:
Q＝N·K (1)
n is the number of times that a response is received by a topology message in a previous time window, K is used to adjust the sensitivity of the system to communication quality, K is set to 0.1, the time window is set according to the transmission density of the message, and 10 messages are generally set to be sent in the time window; and when Q is less than 0.5 or more than 0.9, dynamically updating the message transmission interval time T: if Q is>0.9, T is reduced by 10%, if Q<0.5, T is amplified by 10%; when T is greater than the maximum waiting time TmaxConsidering that the switch has communication interruption, when T is less than the minimum waiting time TminSetting T as the minimum value. The variation of the waiting time T is a real-time updating process in the system with the communication quality. When a line fails, the intelligent distributed FA terminal sends an inquiry to an adjacent terminal according to the time T, wherein the time T is longer than the time TmaxAnd if the response message is not received, judging that the adjacent terminal has communication fault.
Taking fig. 3 as an example, each switch is configured with an intelligent distributed FA terminal, and KG5 is set as a tie switch, and the topology establishment embodiment is as follows.
a) The intelligent distributed FA terminal of the switch KG1 actively initiates topology messages to obtain and analyze terminal parameters of the intelligent distributed FA terminal, and communicates with the intelligent distributed FA terminal of the switch KG2 to obtain adjacent terminal parameters, so that line topology establishment of the intelligent distributed FA terminal is achieved.
b) According to the IP address of KG2 in the intelligent distributed FA terminal parameters of the switch KG1, the intelligent distributed FA terminal can communicate with the intelligent distributed FA terminal of the switch KG2, and the intelligent distributed FA terminal of the switch KG1 sends a link topology message. The topology message comprises a power supply point switch ID number, whether the power supply point switch is electrified, a switch terminal number, a switch state, a distance from a power supply point, current redundancy of the power supply point and fault information.
c) After receiving the link topology message, the intelligent distributed FA terminal of the switch KG2 replies a confirmation frame to the intelligent distributed FA terminal of the switch KG1, and updates the switch terminal number, the switch state and the charged state of the switch KG2 to the topology message;
d) and the intelligent distributed FA terminal of each switch communicates with the intelligent distributed FA terminal of the next switch step by step, establishes connection and updates the topology message. When the topology message is sent to a tie switch (switch opening) KG5, the topology message of the power supply point is converted into a tie topology message, and the tie topology message contains a tie switch ID number, a power supply point ID, a charged state, a separating switch ID, a charged state and a distance from the power supply point.
e) And merging the contact messages into the front of the topology messages to form the latest contact message, communicating the intelligent distributed FA terminal of the contact switch KG5 with KG6 according to the IP address in the terminal parameters, sending the new contact message to the intelligent distributed FA terminal of the KG6 switch, and returning confirmation after the intelligent distributed FA terminal of the KG6 switch receives the link topology messages, thereby finally completing the topology of the whole network.
Taking fig. 4 as an example, assume that the switch KG3 has a communication failure:
a) the intelligent distributed FA terminal of KG2 switch crosses the intelligent distributed FA terminal of KG3 switch after discovering that the intelligent distributed FA terminal communication with KG3 switch breaks down, acquires the intelligent distributed FA terminal parameter of KG4 switch, communicates with the intelligent distributed FA terminal of KG4 switch according to the IP address in the terminal parameter, and updates the topology information of itself.
b) The intelligent distributed FA terminal of the switch KG2 actively sends the latest topology connection message to the intelligent distributed FA terminal of the switch KG4, when the intelligent distributed FA terminal of the switch KG4 receives the latest topology connection message, the confirmation is replied, the override communication is established, and the intelligent distributed FA terminal of the switch KG4 updates the self topology structure and the information of the adjacent switches.
c) And after the updating of the intelligent distributed FA terminal of the switch KG4 is completed, acquiring the intelligent distributed FA terminal parameters of the switch KG5, and communicating with the intelligent distributed FA terminal of the switch KG5 according to the IP address in the terminal parameters until the updating of the whole terminal topology information is completed.
Fig. 5 is an example of a method for processing a line fault:
a) in the whole topology reconstruction process, links are directly established between the intelligent distributed FA terminals of the switches KG2 and KG4, and the intelligent distributed FA terminal of the switch KG3 is deleted from the network topology.
b) The S3 lines and the S4 lines are combined into one line, when faults occur in S3 sections and S4 sections, KG2 and KG4 trip to enlarge an isolation area, the intelligent distributed FA terminal of the switch KG4 requests the intelligent distributed FA terminal of the contact switch KG5 to switch on, and power supply of a non-fault area is recovered.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. An intelligent distributed FA communication fault-tolerant control method based on wireless communication is characterized by comprising the following steps:
the intelligent distributed FA terminal acquires the terminal parameters of the intelligent distributed FA terminal, transversely communicates with the adjacent intelligent distributed FA terminal, and acquires the adjacent terminal parameters, so that the line topology establishment of the intelligent distributed FA terminal is realized;
each intelligent distributed FA terminal acquires parameters of an upstream intelligent distributed FA terminal thereof, and then sends the parameters of the upstream intelligent distributed FA terminal thereof as override terminal parameters to the adjacent intelligent distributed FA terminal for storage through transverse communication with the adjacent intelligent distributed FA terminal;
after the intelligent distributed FA terminal detects the communication interruption of the adjacent terminal, inquiring the override terminal parameter of the adjacent terminal, communicating with the override terminal according to the IP in the override terminal parameter, updating the topology information, sending the latest topology link message to the override terminal, replying confirmation after the override terminal receives the latest topology message, updating the topology information of the override terminal and the adjacent terminal information, and simultaneously, reversely carrying out topology link interaction with the source terminal by the override terminal, thereby realizing the updating of the topology information of the whole line;
when a line fault occurs at a communication interruption position, the intelligent distributed FA terminal carries out fault information interaction with an adjacent terminal according to a new line topology, judges a fault point and carries out fault isolation.
2. The intelligent distributed FA communication fault-tolerant control method based on wireless communication according to claim 1, wherein: the intelligent distributed FA terminal obtains the terminal parameters through an FA parameter model; and after the intelligent distributed FA terminal transversely communicates with the adjacent intelligent distributed FA terminal, analyzing the intelligent distributed FA terminal to obtain the parameters of the adjacent intelligent distributed FA terminal.
3. The intelligent distributed FA communication fault-tolerant control method based on wireless communication according to claim 1, wherein: the terminal parameters comprise a terminal IP, a corresponding switch ID and node IDs on two sides of the corresponding switch.
4. The intelligent distributed FA communication fault-tolerant control method based on wireless communication according to claim 1, wherein: when the line normally runs, the intelligent distributed FA terminal calculates the communication quality Q by sending a message to an adjacent terminal and receiving a response message;
Q＝N·K (1)
wherein, N is the number of times of receiving the response of the topology message in the previous time window, and K is the sensitivity parameter of the communication quality; and when Q is less than 0.5 or more than 0.9, dynamically updating the message transmission interval time T: if Q is>0.9, T is reduced by 10%, if Q<0.5, T is amplified by 10%; when T is greater than the maximum waiting time TmaxJudging that the communication interruption occurs in the switch, and when T is less than the minimum waiting time TminAnd setting T as the minimum value.
5. The intelligent distributed FA communication fault-tolerant control method based on wireless communication according to claim 4, wherein: k is 0.1; setting 10 messages in a time window for sending;
6.the intelligent distributed FA communication fault-tolerant control method based on wireless communication according to claim 4, wherein: when a line fails, the intelligent distributed FA terminal sends an inquiry to an adjacent terminal according to the time T, wherein the time T is longer than the time TmaxAnd if the response message is not received, judging that the adjacent terminal has communication fault.
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