CN114050655A - Power distribution network self-healing system and method based on 5G communication technology - Google Patents
Power distribution network self-healing system and method based on 5G communication technology Download PDFInfo
- Publication number
- CN114050655A CN114050655A CN202111387886.6A CN202111387886A CN114050655A CN 114050655 A CN114050655 A CN 114050655A CN 202111387886 A CN202111387886 A CN 202111387886A CN 114050655 A CN114050655 A CN 114050655A
- Authority
- CN
- China
- Prior art keywords
- healing
- self
- distribution network
- host
- power distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
-
- 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
- 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
-
- 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
- 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
Abstract
The invention relates to a distribution network self-healing system and a distribution network self-healing method based on a 5G communication technology, wherein the distribution network comprises two substations and a plurality of switchyards, the distribution network self-healing system comprises terminal equipment and a self-healing host, the terminal equipment is arranged in each substation and each switchyard, the self-healing host is arranged in any substation or each switchyard, the terminal equipment and the self-healing host are both provided with a 5G card for communication, and the distribution network self-healing system establishes a communication link through the 5G card; the communication link includes: the communication link established by the terminal equipment between the adjacent stations is used for differential protection data interaction; and the communication link established between each terminal device and the self-healing host is used for data interaction between system failure and self-healing. Compared with the prior art, the invention has the advantages of higher reliability, higher protection action speed, low flow demand and the like.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to a power distribution network self-healing system and method based on a 5G communication technology.
Background
The automatic construction of power distribution is an effective means for improving the reliability of power supply, reducing the power failure time, reducing the redundancy of equipment and improving the operating efficiency of a power distribution network. In the distribution automation service, communication is the weakest link, the intelligent degree of power equipment is severely restricted, and the development of distribution automation is also influenced on the time schedule. Traditional power distribution networks lack effective automation and protection means subject to communication conditions. The distribution network introduces the distribution network self-healing system based on the optical fiber, so that the power failure time can be reduced, and the distribution fault can be efficiently processed. However, the full optical fiber line laid in the distribution network has high construction cost and a tense construction channel, thereby restricting the popularization of the distribution network self-healing system.
For example, chinese patent CN113054631A discloses a power distribution network fault isolation self-healing system and method, in which the power distribution network fault isolation self-healing system combines a protection device with a self-healing terminal, the two terminals realize cooperative self-healing through semaphore interaction, the self-healing terminal controls outlet trip and switching of a small power supply, and forms a three-level architecture of a transformer substation, a switching station, and a distribution room, and is suitable for various grid structures in closed-loop operation and open-loop operation. However, the distribution network fault isolation self-healing system in the patent adopts hand-in-hand connection, so that communication delay is long, the distribution network self-healing efficiency is affected, an optical fiber communication mode is adopted in the patent, and the laying cost is very high.
In order to overcome the defects of optical fiber communication, a wireless communication mode can be adopted, and the wireless communication has the characteristics of low construction cost, small construction difficulty and flexible expansion and has great advantages compared with wired communication. As a new generation of wireless communication technology, the 5G has the advantages of high bandwidth, high reliability, low time delay and the like, and provides a communication basis for the power distribution network to realize a power distribution network self-healing system based on wireless communication. Based on the 5G communication network, optical fiber channels are cancelled among the devices, and theoretically, communication connection can be established between the devices at will, so that communication links among the devices of the power distribution network can be greatly simplified. On the other hand, compared with optical fiber communication, 5G communication has the characteristics of large delay jitter, inconsistent two-way delay and the like, and also brings certain difficulties to fault positioning, fault isolation and system self-healing in a distribution network self-healing system based on 5G communication.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a power distribution network self-healing system and method based on a 5G communication technology, which have the advantages of higher reliability, higher protection action speed and low flow demand.
The purpose of the invention can be realized by the following technical scheme:
a distribution network self-healing system based on a 5G communication technology comprises two transformer substations and a plurality of switching stations, and comprises terminal equipment and a self-healing host; each transformer substation and each switch station are respectively provided with a terminal device; the self-healing host is arranged in any transformer substation or switching station; the terminal equipment and the self-healing host are both provided with a 5G card for communication, and the power distribution network self-healing system establishes a communication link through the 5G card; the communication link includes:
the communication link established by the terminal equipment between the adjacent stations is used for differential protection data interaction;
and the communication link established between each terminal device and the self-healing host is used for data interaction between system failure and self-healing.
Preferably, the 5G card is provided with a fixed IP address.
Preferably, the differential protection comprises 5G line differential protection, bus differential protection and feeder line overcurrent protection.
Preferably, the distribution network self-healing system be equipped with the interconnection cabinet, be equipped with the interconnection switch in the interconnection cabinet, the interconnection switch is connected the generating line that two transformer substations were drawn forth.
More preferably, an interconnection switch terminal is arranged at the interconnection cabinet, and the interconnection cabinet is connected to the interconnection switch terminal; and the connection switch terminal is connected with the self-healing host.
Preferably, when a line fault occurs in a protection area of the power distribution network self-healing system, the terminal devices on two sides of the fault line adopt differential protection to realize fault location, and the self-healing host recovers power supply of a non-fault power loss area according to system real-time state information and a fault isolation condition.
Preferably, the terminal device performs system fault discrimination in real time according to locally acquired voltage and current data, and sends a heartbeat message containing state information to an adjacent terminal device.
Preferably, the terminal device detects status information including a switch position and a pressure-free state in real time, and sends a heartbeat message containing the status information to the self-healing host.
A distribution network self-healing method based on a 5G communication technology for the distribution network self-healing system comprises the following steps:
step 1: powering on the equipment and establishing a communication link;
step 2: each terminal device judges system faults in real time according to locally acquired voltage and current data, and sends heartbeat messages containing state information to adjacent terminal devices;
and step 3: each terminal device detects the state information change including the switch position and the pressure and non-pressure state in real time, and sends the heartbeat message containing the state information to the self-healing host, if the self-healing host detects that the system has a fault, the step 4 is executed;
and 4, step 4: when the system has a fault, each terminal device realizes fault positioning based on differential protection, and carries out fault isolation and information real-time uploading according to preset conditions;
and 5: the self-healing host monitors state information sent by each terminal device in the system in real time, updates the running state of the system, and simultaneously sends a self-healing and closing command to the contact switch terminal to complete self-healing of the power distribution network if the self-healing host detects that the current system state meets the self-healing and closing condition.
Preferably, the step 1 specifically comprises:
when each terminal device is powered on, according to the IP configuration of the area topological structure domain, a communication link is automatically established between the terminal device and the adjacent terminal device and the self-healing host.
More preferably, the step 1 further comprises:
each terminal device is respectively provided with a terminal number, and when a communication link is established among the terminal devices, the device with the small terminal number is fixedly used as a server, and the device with the large terminal number is used as a client; when the communication link is established between each terminal device and the self-healing host, the self-healing host is fixedly used as a server.
More preferably, when the communication link is established in step 1, the client actively establishes a link with the server, and the client device sends a link establishment request to the server at regular time when the communication link is interrupted or the related device is abnormal.
Preferably, the step 2 further comprises:
under the condition that the system normally operates, the heartbeat messages containing state information are interacted among the terminal devices according to the low interaction rate; under the condition that the system is detected to have a fault, the terminal equipment which detects the fault immediately sends sampling data of a plurality of cycles before the fault to adjacent equipment, maintains high interaction rate, interacts the sampling data with the adjacent equipment in real time and is used for judging the pilot current differential protection fault.
Preferably, the step 3 further comprises:
if the state information sent to the self-healing host by the terminal equipment is not changed within a preset time threshold, exchanging heartbeat messages containing the state information according to a low interaction rate;
when the state information is detected to be changed, the heartbeat message containing the state information is immediately sent to the self-healing host, and a plurality of frames of messages are continuously sent respectively according to preset sending time intervals for updating and confirming the state information in real time.
More preferably, the self-healing closing condition in the step 5 is specifically:
after the self-healing charging of the interconnection switch is completed, if the conditions that one side of the interconnection switch is pressed, the other side of the interconnection switch is not pressed and faults are successfully isolated are detected, the interconnection switch self-healing closing relay acts and sends a self-healing closing command to an interconnection switch terminal;
and after the contact switch terminal receives the self-healing closing command sent by the self-healing host, closing operation is executed, power supply of a non-fault power loss area is recovered, and self-healing of the power distribution network is completed.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the reliability is higher, and the protection action speed is faster: the power distribution network self-healing system and the power distribution network self-healing method adopt a hierarchical network communication architecture, flatten communication, avoid delay influence caused by serial communication forwarding, and realize rapid sharing of corresponding data only through one 5G communication delay between protection and self-healing control related equipment; compared with a distributed hand-in-hand communication mode, the time delay caused by multi-stage forwarding of state information in the system can be greatly reduced; compared with a centralized communication architecture, the method has the characteristics of higher reliability, higher protection action speed and the like.
Secondly, the flow demand is low: the self-healing system and the self-healing method for the power distribution network are used for variable-rate interaction based on the fault signals, low-rate interaction is adopted when the system is normal, and high-rate interaction is adopted when the system is in fault, so that the flow demand is greatly reduced, and the flow demand is reduced to about one percent of that in normal interaction.
Drawings
Fig. 1 is a schematic structural diagram of a self-healing system of a power distribution network in an embodiment of the present invention.
The reference numbers in the figures indicate:
1. terminal equipment, 2, self-healing host computer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The utility model provides a distribution network self-healing system based on 5G communication technology, as shown in fig. 1, the distribution network includes two transformer substations and a plurality of switchyard (the distribution network self-healing system shown in fig. 1 includes two transformer substations S1, S2 and four switchyards B01-B04), distribution network self-healing system includes terminal equipment 1 and self-healing host computer 2, be equipped with a terminal equipment 1 in every transformer substation and the switchyard respectively, T01-T06 in fig. 1 promptly, self-healing host computer 2 sets up in arbitrary transformer substation or switchyard, terminal equipment 1 and self-healing host computer 2 all configure a fixed IP address and can realize intercommunicating' S5G card, distribution network establishes communication link through the 5G card, communication link includes:
the communication link established by the terminal equipment 1 between adjacent stations is used for differential protection data interaction;
and the communication link established between each terminal device 1 and the self-healing host 2 is used for data interaction between system faults and self-healing.
The differential protection in the embodiment includes 5G line differential protection, bus differential protection, feed-out line overcurrent protection, and the like.
The distribution network self-healing system is provided with an interconnection cabinet, an interconnection switch is arranged in the interconnection cabinet, and the interconnection switch connects buses led out by the two transformer substations. And the connection cabinet is provided with a connection switch terminal, the connection cabinet is connected into the connection switch terminal, and the connection switch terminal is connected into the self-healing host.
The terminal equipment 1 judges the system fault in real time according to the locally acquired voltage and current data, and sends the heartbeat message containing the state information to the adjacent terminal equipment 1. The terminal equipment 1 detects state information including a switch position and a pressure-free state in real time, and sends a heartbeat message containing the state information to the self-healing host 2.
When a line fault occurs in a protection area of the self-healing system of the power distribution network, the terminal equipment 1 on two sides of the fault line adopts differential protection to realize fault location, and the self-healing host 2 recovers power supply of a non-fault power-losing area according to system real-time state information and fault isolation conditions.
The embodiment also relates to a power distribution network self-healing method based on the 5G communication technology, which comprises the following steps:
step 1: when each terminal device is powered on, according to the IP configuration of the area topological structure domain, a communication link is automatically established between the terminal device and the adjacent terminal device and the self-healing host;
each terminal device is respectively provided with a terminal number, and when a communication link is established among the terminal devices, the device with the small terminal number is fixedly used as a server, and the device with the large terminal number is used as a client; when each terminal device establishes a communication link with the self-healing host, the self-healing host is fixedly used as a server;
when a communication link is established, a client actively establishes a link with a server, and under the condition that the communication link is interrupted or related equipment is abnormal, client equipment sends a link establishment request to the server at regular time;
step 2: each terminal device judges system faults in real time according to locally acquired voltage and current data, and sends heartbeat messages containing state information to adjacent terminal devices;
under the condition that the system normally operates, the heartbeat messages containing state information are interacted among the terminal devices according to the low interaction rate; under the condition that a system is detected to have a fault, the terminal equipment which detects the fault immediately sends sampling data of a plurality of cycles before the fault to adjacent equipment, maintains high interaction rate, interacts the sampling data with the adjacent equipment in real time and is used for judging the pilot current differential protection fault;
and step 3: each terminal device detects the state information change including the switch position and the pressure and non-pressure state in real time, and sends the heartbeat message containing the state information to the self-healing host, if the self-healing host detects that the system has a fault, the step 4 is executed;
if the state information sent to the self-healing host by the terminal equipment is not changed within a preset time threshold, exchanging heartbeat messages containing the state information according to a low interaction rate;
when the state information is detected to be changed, a heartbeat message containing the state information is immediately sent to the self-healing host, and a plurality of frames of messages are continuously sent respectively according to preset sending time intervals for updating and confirming the state information in real time;
and 4, step 4: when the system has a fault, each terminal device realizes fault positioning based on differential protection, and carries out fault isolation and information real-time uploading according to preset conditions;
and 5: the self-healing host monitors state information sent by each terminal device in the system in real time, updates the running state of the system, and sends a self-healing closing command to the contact switch terminal to complete self-healing of the power distribution network if the self-healing host detects that the current system state meets the self-healing closing condition;
the self-healing closing conditions are as follows:
after the self-healing charging of the interconnection switch is completed, if the conditions that one side of the interconnection switch is pressed, the other side of the interconnection switch is not pressed and faults are successfully isolated are detected, the interconnection switch self-healing closing relay acts and sends a self-healing closing command to an interconnection switch terminal;
and after the contact switch terminal receives the self-healing closing command sent by the self-healing host, closing operation is executed, power supply of a non-fault power loss area is recovered, and self-healing of the power distribution network is completed.
In the prior art, if a distributed handcrafted communication mode is adopted, the state information of the terminal T01 needs to be transmitted to the T06 through a transmission link of T01- > T02- > T03- > T04- > T05- > T06, and at least 5 times of communication delay is needed; in the method, only T01-is needed to self-heal the host, and only 1 time of communication delay is needed.
If a centralized communication architecture is adopted:
1) assuming that the L01 has a fault, the action sequence is that the T01 and the T02 terminals transmit data to the self-healing host computer, the self-healing host computer carries out fault judgment again, and after the fault judgment is finished, the execution command is transmitted to the T01 and the T02, 2 times of communication delay is needed in the middle.
2) When the system fails, a large amount of real-time data is sent to the self-healing host suddenly, and the communication and processing capacity of the host is required to be high; in the method, because the state information is interacted and is quickly uploaded under the condition of state change, the requirements on the communication and processing capacity of the host computer are lower.
The self-healing method of the power distribution network in the embodiment adopts a hierarchical network communication architecture, and corresponding data can be rapidly shared only through one 5G communication delay between the protection and self-healing control related devices; compared with a distributed hand-in-hand communication mode, the time delay caused by multi-stage forwarding of state information in the system can be greatly reduced; compared with a centralized communication architecture, the method has the characteristics of higher reliability, higher protection action speed and the like.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (15)
1. A distribution network self-healing system based on a 5G communication technology is characterized by comprising terminal equipment (1) and a self-healing host (2); each transformer substation and each switch station are respectively provided with a terminal device (1); the self-healing host (2) is arranged in any transformer substation or switching station; the terminal equipment (1) and the self-healing host (2) are both provided with a 5G card for communication, and the distribution network self-healing system establishes a communication link through the 5G card; the communication link includes:
the communication link established by the terminal equipment (1) between adjacent stations is used for differential protection data interaction;
and the communication link established between each terminal device (1) and the self-healing host (2) is used for data interaction between system faults and self-healing.
2. The power distribution network self-healing system based on 5G communication technology according to claim 1, wherein the 5G card is provided with a fixed IP address.
3. The power distribution network self-healing system based on the 5G communication technology according to claim 1, wherein the differential protection includes 5G line differential protection, bus differential protection, and feeder line overcurrent protection.
4. The distribution network self-healing system based on the 5G communication technology according to claim 1, wherein the distribution network self-healing system is provided with an interconnection cabinet, an interconnection switch is arranged in the interconnection cabinet, and the interconnection switch connects buses led out from two substations.
5. The power distribution network self-healing system based on the 5G communication technology, according to claim 4, wherein an interconnection switch terminal is arranged at the interconnection cabinet, and the interconnection cabinet is connected to the interconnection switch terminal; and the connection switch terminal is connected with the self-healing host.
6. The power distribution network self-healing system based on the 5G communication technology according to claim 1, wherein when a line fault occurs in a protection area of the power distribution network self-healing system, the terminal devices (1) on two sides of the fault line adopt differential protection to realize fault location, and the self-healing host (2) recovers power supply of a non-fault power loss area according to system real-time state information and fault isolation conditions.
7. The power distribution network self-healing system based on the 5G communication technology according to claim 1, wherein the terminal device (1) performs system fault discrimination in real time according to locally acquired voltage and current data, and sends heartbeat messages containing state information to adjacent terminal devices (1).
8. The power distribution network self-healing system based on the 5G communication technology according to claim 1, wherein the terminal device (1) detects status information including a switch position and a pressure-free and voltage-free state in real time, and sends a heartbeat message containing the status information to the self-healing host (2).
9. The power distribution network self-healing method based on the 5G communication technology for the power distribution network self-healing system according to claim 1, wherein the power distribution network self-healing method comprises:
step 1: powering on the equipment and establishing a communication link;
step 2: each terminal device judges system faults in real time according to locally acquired voltage and current data, and sends heartbeat messages containing state information to adjacent terminal devices;
and step 3: each terminal device detects the state information change including the switch position and the pressure and non-pressure state in real time, and sends the heartbeat message containing the state information to the self-healing host, if the self-healing host detects that the system has a fault, the step 4 is executed;
and 4, step 4: when the system has a fault, each terminal device realizes fault positioning based on differential protection, and carries out fault isolation and information real-time uploading according to preset conditions;
and 5: the self-healing host monitors state information sent by each terminal device in the system in real time, updates the running state of the system, and simultaneously sends a self-healing and closing command to the contact switch terminal to complete self-healing of the power distribution network if the self-healing host detects that the current system state meets the self-healing and closing condition.
10. The power distribution network self-healing method based on the 5G communication technology according to claim 9, wherein the step 1 specifically comprises:
when each terminal device is powered on, according to the IP configuration of the area topological structure domain, a communication link is automatically established between the terminal device and the adjacent terminal device and the self-healing host.
11. A self-healing method for a power distribution network based on 5G communication technology according to claim 10, wherein the step 1 further includes:
each terminal device is respectively provided with a terminal number, and when a communication link is established among the terminal devices, the device with the small terminal number is fixedly used as a server, and the device with the large terminal number is used as a client; when the communication link is established between each terminal device and the self-healing host, the self-healing host is fixedly used as a server.
12. The power distribution network self-healing method based on the 5G communication technology, as claimed in claim 11, wherein when the communication link is established in step 1, the client actively establishes the link with the server, and when the communication link is interrupted or the related device is abnormal, the client device sends a link establishment request to the server at regular time.
13. A self-healing method for power distribution networks based on 5G communication technology according to claim 9, wherein the step 2 further includes:
under the condition that the system normally operates, the heartbeat messages containing state information are interacted among the terminal devices according to the low interaction rate; under the condition that the system is detected to have a fault, the terminal equipment which detects the fault immediately sends sampling data of a plurality of cycles before the fault to adjacent equipment, maintains high interaction rate, interacts the sampling data with the adjacent equipment in real time and is used for judging the pilot current differential protection fault.
14. A self-healing method for power distribution networks based on 5G communication technology according to claim 9, wherein the step 3 further includes:
if the state information sent to the self-healing host by the terminal equipment is not changed within a preset time threshold, exchanging heartbeat messages containing the state information according to a low interaction rate;
when the state information is detected to be changed, the heartbeat message containing the state information is immediately sent to the self-healing host, and a plurality of frames of messages are continuously sent respectively according to preset sending time intervals for updating and confirming the state information in real time.
15. The power distribution network self-healing method based on the 5G communication technology according to claim 9, wherein the step 5 self-healing closing condition is specifically:
after the self-healing charging of the interconnection switch is completed, if the conditions that one side of the interconnection switch is pressed, the other side of the interconnection switch is not pressed and faults are successfully isolated are detected, the interconnection switch self-healing closing relay acts and sends a self-healing closing command to an interconnection switch terminal;
and after the contact switch terminal receives the self-healing closing command sent by the self-healing host, closing operation is executed, power supply of a non-fault power loss area is recovered, and self-healing of the power distribution network is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387886.6A CN114050655A (en) | 2021-11-22 | 2021-11-22 | Power distribution network self-healing system and method based on 5G communication technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111387886.6A CN114050655A (en) | 2021-11-22 | 2021-11-22 | Power distribution network self-healing system and method based on 5G communication technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114050655A true CN114050655A (en) | 2022-02-15 |
Family
ID=80210286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111387886.6A Pending CN114050655A (en) | 2021-11-22 | 2021-11-22 | Power distribution network self-healing system and method based on 5G communication technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114050655A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115499943A (en) * | 2022-08-09 | 2022-12-20 | 广西电网有限责任公司电力科学研究院 | Power grid distributed communication implementation method and device |
-
2021
- 2021-11-22 CN CN202111387886.6A patent/CN114050655A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115499943A (en) * | 2022-08-09 | 2022-12-20 | 广西电网有限责任公司电力科学研究院 | Power grid distributed communication implementation method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106375072A (en) | Redundancy control method for locomotive communication network | |
| CN107069676A (en) | Distribution network failure positions and quickly isolated recovery control method | |
| CN101700782B (en) | BAS control system of urban railway system and method thereof | |
| CN108134700B (en) | Method for realizing electric power automation communication data integrity | |
| CN211880174U (en) | Self-adaptive differential protection device based on 5G wireless communication | |
| CN104113141A (en) | Intelligent lengthways interconnected feeder line automatic control method | |
| CN211880175U (en) | Intelligent distributed feeder device based on 5G | |
| CN203027378U (en) | Integrated intelligent isolation switch telecontrol operation and video monitoring system | |
| CN201726403U (en) | Transmission line condition monitoring data transmission system framework | |
| CN114050655A (en) | Power distribution network self-healing system and method based on 5G communication technology | |
| CN115549036A (en) | Distributed new energy relay protection system based on 5G | |
| CN104201657A (en) | Power direction judgment based bidirectional blocking protection method for distributing line | |
| EP3651412A1 (en) | Sdn multi-domain network backup method and system based on dual-port switch | |
| CN113794747B (en) | Dispatching automation distributed multi-channel cluster extension communication system and method | |
| CN110912171A (en) | System and method for switching control authority of parallel multi-terminal high-voltage direct-current converter station | |
| CN102407868B (en) | Hot-standby dual-connection method suitable for communication protocol of modern monitoring system of rail transit | |
| CN110518699B (en) | Out-of-step separation control system based on wide area information | |
| CN108234623B (en) | Automatic balance management method for data acquisition link of distribution network master station | |
| CN109361587B (en) | Intelligent station control layer networking system and method based on HSR (high speed railway) ring network and PRP (redundancy protocol) redundant network | |
| CN102760504A (en) | Digital control system for all plant units in nuclear power station and non-nuclear-grade control system and method | |
| CN113013851A (en) | Distributed intelligent power distribution automation system | |
| CN115296412A (en) | Distributed feeder automation method for power distribution network with distributed power supply based on 5G | |
| CN113131488B (en) | Accurate load shedding system based on power wireless private network and control method thereof | |
| CN109617228A (en) | A kind of distribution distribution feed line automatization system | |
| CN210274112U (en) | Meteorological emergency backup transmission system based on 4G |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |