CN114726104A - Intelligent distributed feeder automation implementation method based on 5G communication - Google Patents
Intelligent distributed feeder automation implementation method based on 5G communication Download PDFInfo
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- CN114726104A CN114726104A CN202210519801.3A CN202210519801A CN114726104A CN 114726104 A CN114726104 A CN 114726104A CN 202210519801 A CN202210519801 A CN 202210519801A CN 114726104 A CN114726104 A CN 114726104A
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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
- H02J13/00004—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 power network being locally controlled
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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
- 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
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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
- 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
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—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 an electric power substation
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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
- H02J13/00032—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
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses an intelligent distributed feeder automation implementation method based on 5G communication, which comprises the following steps: establishing an end-to-end 5G communication network between station terminals DTUs of a power distribution network switching station and between the station terminals DTUs and an on-column switch feeder terminal FTU through a process level switch, a 5G-CPE and a 5G base station; local networking is carried out among all interval units in a switch station through optical fibers; establishing adjacent relation topology description parameters for all switches in a station; performing overcurrent detection on each switch, and receiving an overcurrent state, a failure state, a communication state and an isolation success mark signal of each adjacent switch by the adjacent switches according to the adjacent matrix; carrying out fault positioning on the distribution network terminal; after the fault isolation is successful, transmitting an isolation success signal to the interconnection switch through 5G communication, and enabling the power supply recovery module to switch on to judge and finish power supply recovery by the interconnection switch; and quick and reliable fault isolation and power supply recovery are realized.
Description
Technical Field
The invention belongs to the technical field of distribution network automation, and particularly relates to an intelligent distributed feeder automation implementation method based on 5G communication.
Background
The existing Feeder Automation (FA) modes in China mainly include four types: the intelligent distributed FA comprises a main station concentrated FA which is used for carrying out fault positioning and remote control operation by a distribution network main station, a recloser FA represented by a voltage current-time type, an intelligent distributed FA which realizes local fault isolation by peer-to-peer communication between distribution network terminals and a relay protection type FA which realizes fault removal by adjacent protection cooperation. The intelligent distributed FA has the most excellent performance, does not need the participation of a distribution network main station, can quickly isolate a fault section before the action of a substation outgoing switch by means of peer-to-peer communication among distribution network terminals, avoids the power failure of the whole line, can adapt to various distribution lines with complex topologies, and limits the application of the distribution network terminals due to the fact that optical fiber communication is needed among the distribution network terminals.
Disclosure of Invention
The invention aims to solve the problems that: the intelligent distributed feeder automation implementation method based on 5G communication is provided, so that IEC61850-GOOSE end-to-end peer-to-peer communication is carried out through 5G without depending on a distribution line to erect optical fibers, and rapid and reliable fault isolation and power supply recovery are achieved.
The technical scheme of the invention is as follows:
an intelligent distributed feeder automation implementation method based on 5G communication is characterized in that: it includes:
step 2, after numbering all switches in a station, configuring an adjacency matrix of each switch, and establishing an adjacent relation topology description parameter;
step 3, the distribution network terminal carries out overcurrent detection on each switch, and adjacent switches respectively receive the overcurrent state, the refusal action state, the communication state and the isolation success mark signal of each adjacent switch through the local area network or the 5G communication network in the station according to the adjacent matrix;
step 4, starting a fault judgment module by the distribution network terminal to perform fault positioning, and respectively removing a fault upstream switch and a fault downstream switch;
and 5, transmitting an isolation success signal to the interconnection switch through 5G communication after the fault isolation is successful, starting the power supply recovery module by the interconnection switch to judge closing, and closing the interconnection switch to finish power supply recovery after the closing condition is met.
The 5G communication network and the optical fiber network realize the signal transmission function between adjacent switches through IEC61850-GOOSE peer-to-peer communication.
The method for establishing the adjacency matrix comprises the following steps:
2.1, dividing the switch into two types, wherein one type is a section switch, which refers to a switch on a main line and comprises a tie switch; the other type is a boundary switch which is positioned on a bus of a switch station and is directly connected with a final load;
2.2, dividing adjacent switches of each switch into three types including left adjacent sectional switches and at most M; the right side is adjacent to the section switches, and at most M section switches are arranged on the right side; at most N adjacent boundary switches are arranged, and then switch numbers are input into an adjacent matrix;
and 2.3, each switch sends information to the adjacent switch according to the adjacency matrix relation and receives the information of the adjacent switch.
And when each switch sends information to and receives information of the adjacent switches according to the adjacency matrix relationship, the information of each switch is communicated through a GOOSE message of a 5G communication network or an in-station optical fiber local area network, and the information of each switch comprises an overcurrent state, a failure state, a communication state and an isolation success mark, and is Boolean quantity.
The logic for judging the fault upstream switch when the fault judging module carries out fault positioning comprises the following steps:
(5) the overcurrent state of the switch is 1;
(6) the overcurrent states of all adjacent boundary switches are 0;
(7) for the first switch, only one side of the adjacent sectional switch has no over-current state; for the last switch, an overcurrent state exists in any one of the adjacent sectional switches on the two sides; for other switches, only one side of the adjacent sectional switches on the two sides has an overcurrent state;
(8) no communication failure;
the present switch is determined to be the failed upstream switch.
The discrimination logic of the downstream switch of the fault includes:
the overcurrent state of the switch is 0;
the overcurrent states of all adjacent boundary switches are 0;
when no communication fault exists, only one switch of the adjacent sectional switches at the two sides has an overcurrent state; when communication is in fault, the switch has no voltage and no current;
the present switch is determined to be the failed downstream switch.
After the switch is judged to be a fault upstream switch or a fault downstream switch, a switch-off instruction is issued after 20ms of delay, and the fault isolation function of intelligent distributed feeder automation is completed; after the fault isolation function is completed, the fault downstream switch sends an isolation success mark, and the isolation success mark is forwarded to the interconnection switch through more than one stage of switches.
The method for judging closing by starting the power supply recovery module by the tie switch and completing power supply recovery by closing the tie switch after meeting the closing condition comprises the following steps:
the power restoration logic of the tie switch is:
(7) the interconnection switch is in the position division;
(8) the duration time of pressure on both sides exceeds 15 seconds;
(9) the adjacent section switches on two sides have no overcurrent state;
(10) the adjacent section switches on two sides have no switch failure state;
(11) the switch has single-side voltage loss;
(12) receiving an isolation success mark;
after the contact switch meets the power supply recovery condition, the contact switch is subjected to settable delay TllAnd then, sending a command of closing the interconnection switch to complete the power supply recovery function of the intelligent distributed feeder automation.
The invention has the beneficial effects that:
the intelligent distributed feeder automation implementation based on 5G communication provided by the invention can realize quick and reliable fault isolation and power supply recovery by utilizing the 5G communication to realize end-to-end communication between distribution network terminals in a scene that a distribution network is not provided with optical fiber erection, and comprises the following steps:
1. the mode that the traditional intelligent distributed feeder automation must depend on a special optical fiber channel is changed, the investment and construction cost is greatly reduced, and the application scene of the intelligent distributed feeder automation function is expanded by means of 5G communication.
2. 5G communication between each node of the distribution network feeder line does not need to depend on GPS time synchronization, and the requirements of rapid and reliable fault isolation and power supply recovery can be met only by using the low delay characteristic of the 5G communication.
3. The data transmission of the 5G network slice only comprises IEC61860-GOOSE signals, the data transmission quantity is small, the bandwidth requirement on 5G communication is reduced, and the reliability of the 5G communication is ensured.
4. The distribution network architecture which can adapt to any complex topology by configuring the adjacency matrix can complete the functions of precise fault isolation and power supply recovery.
The IEC61850-GOOSE end-to-end peer-to-peer communication is realized through 5G in a mode of erecting optical fibers independent of a distribution line, and rapid and reliable fault isolation and power supply recovery are realized.
Drawings
Fig. 1 is a flow chart of a 5G communication-based intelligent distributed feeder automation scheme of the present invention;
FIG. 2 is a diagram of a contiguous matrix configuration and description of the present invention;
FIG. 3 is a logic block diagram of the fault location module of the present invention;
fig. 4 is a power restoration module logic block diagram of the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In order to more clearly explain the technical solutions and advantages of the present invention, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The utility model provides an intelligent distributed feeder automation realizes based on 5G communication, hardware architecture includes: a distribution network terminal with a 5G communication function is installed among all switch stations (including column switches) of a distribution network, the distribution network terminal independently forms a network through a process layer switch, a 5G-CPE, a 5G base station, an IP bearing network and a 5G core network to realize end-to-end communication, and a local area network is established among switch intervals in all the switch stations through optical fibers. The two networks are all used for carrying out IEC61850-GOOSE peer-to-peer communication to realize the signal transmission function between adjacent switches.
On the software of the distribution network terminal, an adjacency matrix as shown in fig. 2 is configured for each switch of the switch station, and is used for describing the adjacency relation between the switches. (1) Firstly, the switches are divided into two types, one type is a section switch, which refers to a switch on a main line and comprises a connection switch; the other type is a boundary switch, also called a user switch, which is generally positioned on a bus of a switch station and directly connected with a final load; (2) the adjacent switches of each switch are classified into three types: the left side is adjacent to the section switches, and the number of the section switches is at most M; the right side is adjacent to the section switches, and at most M section switches are arranged on the right side; and (4) making a plurality of N adjacent boundary switches, and inputting switch numbers in an adjacent matrix (if the adjacent sectional switches are in adjacent switch stations, performing special coding). (3) Each switch sends information to the adjacent switches according to the adjacency matrix relationship, receives the information of the adjacent switches, and communicates through the GOOSE messages of the above 5G communication network or the in-station optical fiber local area network, wherein the information of each switch comprises: the overcurrent state, the refusal state, the communication state, the isolation success mark and the like are Boolean quantities, and the data communication quantity is very small.
After each switch receives all the adjacent switch information associated in the adjacency matrix, the fault location function is executed by starting the logic of the fault determination module shown in fig. 3, including the determination logic of the fault upstream switch and the fault downstream switch.
The discrimination logic of the fault upstream switch is:
(9) the overcurrent state of the switch is 1;
(10) the overcurrent states of all adjacent boundary switches are 0;
(11) for the first switch, only one side of the adjacent segmented switches has no overcurrent state;
for the last switch, an overcurrent state exists in any one of the adjacent segmented switches on the two sides;
for other switches, only one side of the adjacent sectional switches on the two sides has an overcurrent state;
(12) there is no communication failure (communication state is 1).
The discrimination logic of the fault downstream switch is as follows:
(1) the overcurrent state of the switch is 0;
(2) the overcurrent states of all adjacent boundary switches are 0;
(3) when no communication fault exists, only one switch of the adjacent sectional switches at the two sides has an overcurrent state; when communication is in fault, the switch has no voltage and no current.
If the switch is judged to be a fault upstream switch or a fault downstream switch, a switch-off instruction is issued after short delay (20ms), and the fault isolation function of intelligent distributed feeder automation is completed.
After the fault isolation function is completed, the fault downstream switch sends an isolation success mark, the isolation success mark is forwarded to the tie switch through the multi-stage switch, the tie switch starts the power supply recovery module logic shown in fig. 4 to execute the power supply recovery function, and the power supply recovery logic of the tie switch is as follows:
(13) the interconnection switch is in the position division;
(14) the duration time of pressure on both sides exceeds 15 seconds;
(15) the adjacent section switches on two sides have no overcurrent state;
(16) the adjacent section switches on two sides have no switch failure state;
(17) the switch has single-side voltage loss;
(18) and receiving an isolation success mark.
After the contact switch meets the power supply recovery condition, the contact switch is subjected to settable delay TllAnd issuing a command of closing the interconnection switch to complete the power supply recovery function of the intelligent distributed feeder automation.
The flow chart of the implementation of intelligent distributed feeder automation based on 5G communication is shown in fig. 1.
Step S510: a set of distribution network terminal (station terminal DTU) with a 5G communication function is arranged in each switch station of the distribution network, a feeder terminal FTU with the 5G communication function is arranged on the column switch, and an inter-station 5G communication network and an intra-station optical fiber local area network are established.
Step S520: and configuring an adjacency matrix describing the adjacent relation of the switches for each switch of the switch station, and then establishing the issuing and subscribing relation of GOOSE signals of the adjacent switches according to the adjacency matrix through the inter-station 5G communication network and the intra-station optical fiber local area network.
Step S530: and each switch executes fault judgment and power supply recovery logic according to the self information and the received adjacent switch information, and finally, the automatic fault isolation and power supply recovery functions of the intelligent distributed feeder are completed.
Claims (8)
1. An intelligent distributed feeder automation implementation method based on 5G communication is characterized in that: it includes:
step 1, establishing an end-to-end 5G communication network between station terminals DTUs of a power distribution network switching station and between the station terminals DTUs and an on-column switch feeder terminal FTU through a process layer switch, a 5G-CPE and a 5G base station; local networking is carried out among all interval units in a switch station through optical fibers;
step 2, after numbering all switches in a station, configuring an adjacency matrix of each switch, and establishing an adjacent relation topology description parameter;
step 3, the distribution network terminal carries out overcurrent detection on each switch, and the adjacent switches respectively receive the overcurrent state, the refusal action state, the communication state and the isolation success mark signal of each adjacent switch through the local area network or the 5G communication network in the station according to the adjacent matrix;
step 4, starting a fault judgment module by the distribution network terminal to perform fault positioning, and respectively removing a fault upstream switch and a fault downstream switch;
and 5, transmitting an isolation success signal to the interconnection switch through 5G communication after the fault isolation is successful, starting a power supply recovery module by the interconnection switch to judge closing, and closing the interconnection switch to finish power supply recovery after meeting closing conditions.
2. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: the 5G communication network and the optical fiber network realize the signal transmission function between adjacent switches through IEC61850-GOOSE peer-to-peer communication.
3. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: the method for establishing the adjacency matrix comprises the following steps:
2.1, dividing the switch into two types, wherein one type is a section switch, which refers to a switch on a main line and comprises a connection switch; the other type is a boundary switch which is positioned on a bus of a switch station and is directly connected with a final load;
2.2, dividing adjacent switches of each switch into three types including left adjacent sectional switches and at most M; the right side is adjacent to the section switches, and at most M section switches are arranged on the right side; at most N adjacent boundary switches are arranged, and then switch numbers are input into an adjacent matrix;
and 2.3, each switch sends information to the adjacent switches according to the adjacency matrix relationship and receives the information of the adjacent switches.
4. The intelligent distributed feeder automation implementation method based on 5G communication as claimed in claim 3, wherein: and when each switch sends information to and receives information of the adjacent switches according to the adjacency matrix relationship, the information is communicated through GOOSE messages of a 5G communication network or an in-station optical local area network, and the information of each switch comprises an overcurrent state, a failure state, a communication state and an isolation success mark, which are Boolean quantities.
5. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: the judgment logic of the fault upstream switch when the fault judgment module carries out fault positioning comprises the following steps:
(1) the overcurrent state of the switch is 1;
(2) the overcurrent states of all adjacent demarcation switches are 0;
(3) for the first switch, only one side of the adjacent segmented switches has no overcurrent state; for the last switch, an overcurrent state exists in any one of the adjacent segmented switches on the two sides; for other switches, only one side of the adjacent sectional switches on the two sides has an overcurrent state;
(4) no communication failure;
the present switch is determined to be the failed upstream switch.
6. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: the discrimination logic of the downstream switch of the fault includes:
the overcurrent state of the switch is 0;
the overcurrent states of all adjacent demarcation switches are 0;
when no communication fault exists, only one switch of the adjacent sectional switches at the two sides has an overcurrent state; when the communication is in failure, the switch has no voltage and no current;
the present switch is determined to be the failed downstream switch.
7. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: after the switch is judged to be a fault upstream switch or a fault downstream switch, a switch-off instruction is issued after 20ms of delay, and the fault isolation function of intelligent distributed feeder automation is completed; after the fault isolation function is completed, the fault downstream switch sends an isolation success mark, and the isolation success mark is forwarded to the interconnection switch through more than one stage of switches.
8. The intelligent distributed feeder automation implementation method based on 5G communication according to claim 1, characterized in that: the method for judging closing by starting the power supply recovery module by the tie switch and completing power supply recovery by closing the tie switch after meeting the closing condition comprises the following steps:
the power restoration logic of the tie switch is:
(1) the interconnection switch is in the position division;
(2) the duration time of pressure on both sides exceeds 15 seconds;
(3) the adjacent section switches on two sides have no overcurrent state;
(4) the adjacent section switches on both sides have no switch refusing state;
(5) the switch has single-side voltage loss;
(6) receiving an isolation success mark;
after the contact switch meets the power supply recovery condition, the contact switch is subjected to settable delay TllAnd then, sending a command of closing the interconnection switch to complete the power supply recovery function of the intelligent distributed feeder automation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742596A (en) * | 2023-08-10 | 2023-09-12 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116742596A (en) * | 2023-08-10 | 2023-09-12 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
| CN116742596B (en) * | 2023-08-10 | 2023-11-07 | 石家庄科林电气股份有限公司 | Distributed feeder automatic protection method, distribution terminal, system and storage medium |
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