CN115313375A - Fault isolation self-healing method and device for power distribution network and storage medium - Google Patents
Fault isolation self-healing method and device for power distribution network and storage medium Download PDFInfo
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- CN115313375A CN115313375A CN202211025900.2A CN202211025900A CN115313375A CN 115313375 A CN115313375 A CN 115313375A CN 202211025900 A CN202211025900 A CN 202211025900A CN 115313375 A CN115313375 A CN 115313375A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/00125—Transmission line or load transient problems, e.g. overvoltage, resonance or self-excitation of inductive loads
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- 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
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- 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
- H02H7/28—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 for meshed systems
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a fault isolation self-healing method, a device and a storage medium for a power distribution network, wherein the method comprises the following steps: self-healing charging is carried out at an open loop point; fault positioning: determining a fault line based on a current differential or pilot direction principle; fault removal: sending a joint tripping command to the interval of the adjacent circuit breakers at the two sides of the fault line, and taking the tripped circuit breaker as a fault removal point; self-healing charging of a fault removal point; fault isolation: after the fault is removed, the adjacent load switches on the two sides of the fault line automatically trip off; opening a ring point self-healing action: after fault isolation, the open-loop points are closed by self-healing at intervals, and power supply between the open-loop points and a fault line is recovered; self-healing action of the fault removal point: after fault isolation, self-healing switching on is carried out at intervals at the fault removal point, and power supply between the fault removal point and a fault line is recovered; the invention can be suitable for a power distribution network with a circuit breaker and a load switch, can quickly cut off and isolate self-healing when a circuit of the load switch has a fault, and can reduce the load loss of the power grid.
Description
Technical Field
The invention relates to a fault isolation self-healing method, a fault isolation self-healing device and a storage medium for a power distribution network, and belongs to the technical field of relay protection.
Background
The power distribution network plays an important role in connecting the last kilometer of the power users, and has great influence on the production and life of people. The power distribution network has a large number of scenes that circuit breakers and load switches are used together, and the load switches do not have the capacity of cutting off short-circuit fault current, so that after a fault occurs, the load switches cannot be tripped, only superior backup overcurrent protection override tripping is needed, override tripping is delayed for a long time, overcurrent protection is difficult to realize level difference matching, and rapid isolation of the fault is difficult to realize. Meanwhile, in order to improve the power supply reliability of the power distribution network, a self-healing device is generally configured in an area with high reliability requirement to realize rapid power supply recovery. The self-healing device requires that only one switch in the ring network power supply is positioned, namely, a ring opening point, and after fault isolation, the self-healing device closes the ring opening point switch to realize fault recovery. For a load switch configuration scene, after the open-loop point switch is self-healed and switched on, power supply between the open-loop point and a fault point can be recovered, but due to the override trip, the area between the fault removal point and the fault point is still in a power loss state, so that the load loss of a power grid is caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a fault isolation and self-healing method, a fault isolation and self-healing device and a storage medium for a power distribution network, which can quickly remove and isolate faults when a line of a load switch has faults, quickly recover power supply of a non-fault area between a fault removal point and a fault point after an upper-level switch trips to remove the faults, and reduce load loss of the power distribution network.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a fault isolation self-healing method for a power distribution network, where the power distribution network includes a plurality of trunk lines and a power distribution room, and there is only one open loop point on each trunk line, including:
open-loop point self-healing charging: charging the open loop point interval based on a preset first charging logic;
fault positioning: collecting the current of each power distribution room bus, and determining a fault line based on the current differential or longitudinal direction principle;
fault removal: if the adjacent intervals on the two sides of the fault line are both load switches, sending a joint tripping command to the adjacent intervals on the two sides of the fault line, which are circuit breakers, and taking the tripped circuit breaker as a fault removal point;
self-healing charging of a fault removal point: after the fault is removed, charging the tripped fault removal point interval based on a preset second charging logic;
fault isolation: after the fault is removed, the fault line enters a non-voltage and non-current state, and adjacent load switches on two sides of the fault line automatically trip;
opening a ring point self-healing action: after fault isolation, the open-loop points are closed by self-healing at intervals, and power supply between the open-loop points and a fault line is recovered;
self-healing action of the fault removal point: after the fault is isolated, the fault removing point is closed in a self-healing mode at intervals, and power supply between the fault removing point and a fault line is recovered.
Optionally, when the fault clearing point interval receives the jump command, it is obtained whether the current of the fault clearing point interval is greater than the threshold current, and if so, the fault clearing point interval is tripped instantaneously.
Optionally, the charging the open loop point interval based on the preset first charging logic includes:
on the main line, if the open-loop points are spaced at the splitting position, the rest are spaced at the closing position, and the buses of the power distribution room on the side and the opposite side of the open-loop point interval have voltage, the open-loop points are charged at intervals;
the charging the tripped fault clearing point interval based on the preset second charging logic comprises:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
In a second aspect, the present invention provides a fault isolation self-healing apparatus for a power distribution network, the power distribution network including a plurality of main lines and a power distribution room, the main lines having one and only one open loop point, the apparatus including:
the open-loop point self-healing charging module is used for charging the open-loop point at intervals based on a preset first charging logic;
the fault positioning module is used for acquiring the current of each power distribution room bus and determining a fault line based on the current differential or longitudinal direction principle;
the fault clearing module is used for sending a joint tripping command to the interval, which is adjacent to the circuit breaker, on the two sides of the fault line if the adjacent intervals on the two sides of the fault line are both load switches, and taking the tripped circuit breaker as a fault clearing point;
the fault clearing point self-healing charging module is used for charging the tripped fault clearing point interval based on a preset second charging logic after the fault is cleared;
the fault isolation module is used for enabling a fault line to enter a non-voltage and non-current state after a fault is removed, and enabling adjacent load switches on two sides of the fault line to automatically trip;
the open-loop point self-healing action module is used for self-healing closing of the open-loop points at intervals after fault isolation and recovering power supply between the open-loop points and a fault line;
and the fault removing point self-healing action module is used for self-healing closing of the fault removing points at intervals after fault isolation, and recovering power supply between the fault removing points and a fault line.
Optionally, when the fault clearing point interval receives the jump command, it is obtained whether the current of the fault clearing point interval is greater than the threshold current, and if so, the fault clearing point interval is tripped instantaneously.
Optionally, the charging the open loop point interval based on the preset first charging logic includes:
on the main line, if the open-loop points are spaced at the splitting position, the rest are spaced at the closing position, and the buses of the power distribution room on the side and the opposite side of the open-loop point interval have voltage, the open-loop points are charged at intervals;
the charging the tripped fault clearing point interval based on the preset second charging logic comprises:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
In a third aspect, the invention provides a fault isolation and self-healing device for a power distribution network, which comprises a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps according to the above-described method.
In a fourth aspect, the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method.
Compared with the prior art, the invention has the following beneficial effects:
the fault isolation self-healing method, the fault isolation self-healing device and the storage medium of the power distribution network can be suitable for the power distribution network with the circuit breaker and the load switch, and when a circuit configured with the load switch breaks down, the fault can be quickly removed and isolated based on the transmission of a trip command; after the fault is isolated, the power supply is recovered through the open-loop point self-healing switch-on, and meanwhile, the fault removal point can also be self-healing switch-on, so that the power supply loss between the fault removal point and the fault after override tripping caused by the configuration of the load switch is avoided, the power supply reliability of the power distribution network is effectively improved, and the method has a good application prospect.
Drawings
Fig. 1 is a flowchart of a fault isolation self-healing method for a power distribution network according to an embodiment of the present invention;
fig. 2 is a typical system framework diagram of a fault isolation self-healing method for a power distribution network according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The first embodiment is as follows:
as shown in fig. 1, an embodiment of the present invention provides a fault isolation self-healing method for a power distribution network, where the power distribution network includes a plurality of main lines and a power distribution room, and there is only one open-loop point on each main line, including the following steps:
1. opening a ring point self-healing charging: charging the open loop point interval based on a preset first charging logic; the method specifically comprises the following steps:
on the main line, if the open loop point interval is in the branch position, the rest intervals are in the closed position, and the bus of the power distribution room on the side opposite to the open loop point interval has voltage, the open loop point interval is charged.
2. Fault positioning: collecting the current of each power distribution room bus, and determining a fault line based on the current differential or longitudinal direction principle;
the longitudinal differential protection principle is that according to kirchhoff's law, namely the sum of currents flowing to a node is equal to zero, and a line with a fault is judged according to the current of a power distribution room bus.
3. Fault removal: if the adjacent intervals on the two sides of the fault line are both load switches, sending a joint tripping command to the adjacent intervals on the two sides of the fault line, which are circuit breakers, and taking the tripped circuit breaker as a fault removal point;
and when the fault removal point interval receives the joint tripping command, acquiring whether the current of the fault removal point interval is larger than the threshold current, and if so, tripping instantaneously.
4. Self-healing charging of a fault removal point: after the fault is removed, charging the tripped fault removal point interval based on a preset second charging logic; the method specifically comprises the following steps:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
5. Fault isolation: after the fault is removed, the fault line enters a non-voltage and non-current state, and the adjacent load switches on the two sides of the fault line are automatically tripped.
6. Opening a ring point self-healing action: after fault isolation, the open-loop points are closed by self-healing at intervals, and power supply between the open-loop points and a fault line is recovered.
7. Self-healing action of the fault removal point: after the fault is isolated, the fault removing point is closed in a self-healing mode at intervals, and power supply between the fault removing point and a fault line is recovered.
As shown in fig. 2, taking a typical system architecture as an example:
the power distribution network comprises transformer substations S1, S2, S3 and S4, the transformer substations S1 and S4 are connected with a main line I, and the transformer substations S2 and S3 are connected with a main line II; the trunk line I, II sequentially passes through the power distribution room A, B, C and D; each power distribution room comprises two interval groups formed by connecting in series at intervals, and the interval groups of each power distribution room are connected in series on the main line; in each interval group, two interval series points lead out buses which are respectively marked as a bus I and a bus II; taking the main line I as an example, the main line I comprises intervals QF1, QF2, QF3, QF4, QL5, QL6, QF7, QF8, QF9 and QF10, wherein the intervals QF2 and QF3 are positioned in a power distribution room a, the intervals QF4 and QL5 are positioned in a power distribution room B, the intervals QL6 and QF7 are positioned in a power distribution room C, the intervals QF8 and QF9 are positioned in a power distribution room D, the intervals QL5 and QL6 are load switches, and the rest of the intervals are circuit breakers; the interval QF4 is set to the open loop point, and F1 is the faulty line.
The fault isolation self-healing system comprises a plurality of self-healing devices, and the self-healing devices are arranged on the buses of the power distribution rooms and correspond to the buses of the power distribution rooms one to one; based on the network topology structure, the self-healing devices only communicate with adjacent self-healing devices, and the communication mode can be a wired or wireless mode.
The working process is as follows:
1. opening a ring point self-healing charging: charging the open loop point interval QF4 based on a preset first charging logic; the method specifically comprises the following steps:
on the trunk line I, if the open loop point interval QF4 is in the split position, the rest intervals are in the closed position, and the buses I of the power distribution room A and the power distribution room B on the same side and the opposite side of the open loop point interval QF4 have voltage, the open loop point interval QF4 is charged. The interval state and the voltage state are acquired through the self-healing device.
2. Fault positioning: collecting the current of each power distribution room bus, and determining a fault line F1 based on the current differential or longitudinal direction principle;
the longitudinal differential protection principle is that according to kirchhoff's law, namely the sum of currents flowing to a node is equal to zero, and a line with a fault is judged according to the current of a power distribution room bus.
3. Fault removal: if the adjacent intervals QL5 and QL6 on the two sides of the fault line are load switches, acquiring the adjacent intervals QF4 and QF7 which are circuit breakers on the two sides of the fault line as fault removal points, and sending a joint tripping command;
and when the fault removal point intervals QF4 and QF7 receive the joint jump command, acquiring whether the current of the fault removal point intervals is larger than the threshold current, and if so, jumping instantaneously. The interval QF4 is an open loop point, so that the condition is not met, and the jumping is not needed; the interval QF7 satisfies the condition and jumps.
4. Self-healing charging of a fault removal point: after the fault is removed, charging the tripped fault removal point interval QF7 based on a preset second charging logic; the method specifically comprises the following steps:
on the trunk line I, if fault removal points and open-loop point intervals QF7 and QF4 are in separate positions, the rest intervals are in closed positions, and voltage is applied to the bus I of the power distribution room C and the bus I of the opposite side of the fault removal point interval QF7, the fault removal point interval QF7 is charged.
5. Fault isolation: after the fault is removed, the fault line F1 enters a non-voltage and non-current state, and the adjacent load switches QL5 and QL6 on the two sides of the fault line F1 automatically trip.
6. Opening a ring point self-healing action: after fault isolation, the open loop point interval QF4 is closed in a self-healing mode, and power supply between the open loop point QF4 and the fault line F1 is recovered.
7. Self-healing action of the fault removal point: after the fault is isolated, the fault removal point interval QF7 is closed in a self-healing mode, and power supply between the fault removal point QF7 and the fault line F1 is recovered, namely power supply of the power distribution room C is recovered.
Example two:
the embodiment of the invention provides a fault isolation self-healing device of a power distribution network, wherein the power distribution network comprises a plurality of trunk lines and a power distribution room, only one open loop point is arranged on each trunk line, and the device comprises:
the open-loop point self-healing charging module is used for charging the open-loop point at intervals based on a preset first charging logic;
the fault positioning module is used for acquiring the current of each power distribution room bus and determining a fault line based on the current differential or longitudinal direction principle;
the fault clearing module is used for sending a joint tripping command to the interval, which is adjacent to the circuit breaker, on the two sides of the fault line if the adjacent intervals on the two sides of the fault line are both load switches, and taking the tripped circuit breaker as a fault clearing point;
the fault removal point self-healing charging module is used for charging the tripped fault removal point interval based on a preset second charging logic after the fault removal;
the fault isolation module is used for enabling a fault line to enter a non-voltage and non-current state after a fault is removed, and enabling adjacent load switches on two sides of the fault line to automatically trip;
the open-loop point self-healing action module is used for self-healing closing of the open-loop points at intervals after fault isolation and recovering power supply between the open-loop points and a fault line;
and the fault removing point self-healing action module is used for self-healing closing of the fault removing points at intervals after fault isolation, and recovering power supply between the fault removing points and a fault line.
Specifically, when the fault clearing point interval receives the joint tripping command, whether the current of the fault clearing point interval is larger than the threshold current or not is acquired, and if yes, the fault clearing point interval is tripped instantaneously.
Specifically, charging the open loop point interval based on a preset first charging logic includes:
on the main line, if the open-loop points are spaced at the splitting position, the rest are spaced at the closing position, and the buses of the power distribution room on the side and the opposite side of the open-loop point interval have voltage, the open-loop points are charged at intervals;
charging the tripped fault clearing point interval based on a preset second charging logic comprises:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
Example three:
based on the first embodiment, the embodiment of the invention provides a fault isolation self-healing device for a power distribution network, which comprises a processor and a storage medium, wherein the processor is used for processing a fault isolation self-healing signal;
a storage medium to store instructions;
the processor is configured to operate in accordance with instructions to perform steps in accordance with the above-described method.
Example four:
according to a first embodiment, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the method.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a fault isolation self-healing method of distribution network, the distribution network includes a plurality of trunk lines and distribution room, there is and only one open loop point on the trunk line, its characterized in that includes:
opening a ring point self-healing charging: charging the open loop point interval based on a preset first charging logic;
fault positioning: collecting the current of each power distribution room bus, and determining a fault line based on the current differential or longitudinal direction principle;
fault removal: if the adjacent intervals on the two sides of the fault line are both load switches, sending a joint tripping command to the adjacent intervals on the two sides of the fault line, which are circuit breakers, and taking the tripped circuit breaker as a fault removal point;
self-healing charging of a fault removal point: after the fault is removed, charging the tripped fault removal point interval based on a preset second charging logic;
fault isolation: after the fault is removed, the fault line enters a non-voltage and non-current state, and adjacent load switches on two sides of the fault line automatically trip;
opening a ring point self-healing action: after fault isolation, the open-loop points are closed by self-healing at intervals, and power supply between the open-loop points and a fault line is recovered;
self-healing action of the fault removal point: after the fault is isolated, the fault removing point is closed in a self-healing mode at intervals, and power supply between the fault removing point and a fault line is recovered.
2. The method according to claim 1, wherein when the fault clearing point interval receives the simultaneous tripping command, the fault clearing point interval determines whether a current of the fault clearing point interval is greater than a threshold current, and if so, the fault clearing point interval is tripped instantaneously.
3. The method according to claim 1, wherein the charging the open loop point interval based on the preset first charging logic comprises:
on the main line, if the open-loop points are spaced at the splitting position, the rest are spaced at the closing position, and the buses of the power distribution room on the side and the opposite side of the open-loop point interval have voltage, the open-loop points are charged at intervals;
the charging the tripped fault clearing point interval based on the preset second charging logic comprises:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
4. The utility model provides a fault isolation self-healing device of distribution network, the distribution network includes a plurality of trunk lines and distribution room, there is and only one open loop point on the trunk line, its characterized in that, the device includes:
the open-loop point self-healing charging module is used for charging the open-loop point at intervals based on a preset first charging logic;
the fault positioning module is used for acquiring the current of each power distribution room bus and determining a fault line based on the current differential or longitudinal direction principle;
the fault clearing module is used for sending a joint tripping command to the interval, which is adjacent to the circuit breaker, on the two sides of the fault line if the adjacent intervals on the two sides of the fault line are both load switches, and taking the tripped circuit breaker as a fault clearing point;
the fault removal point self-healing charging module is used for charging the tripped fault removal point interval based on a preset second charging logic after the fault removal;
the fault isolation module is used for enabling a fault line to enter a non-voltage and non-current state after a fault is removed, and enabling adjacent load switches on two sides of the fault line to automatically trip;
the open-loop point self-healing action module is used for self-healing closing of the open-loop points at intervals after fault isolation and recovering power supply between the open-loop points and a fault line;
and the fault removing point self-healing action module is used for self-healing closing of the fault removing points at intervals after fault isolation, and recovering power supply between the fault removing points and a fault line.
5. The fault isolation self-healing device for the power distribution network according to claim 4, wherein the fault clearing point interval obtains whether a current of the fault clearing point interval is greater than a threshold current when a joint tripping command is received, and if so, the fault clearing point interval is tripped instantaneously.
6. The fault isolation and self-healing device for the power distribution network according to claim 4, wherein the charging the open loop point interval based on the preset first charging logic comprises:
on the main line, if the open-loop points are spaced at the splitting position, the rest are spaced at the closing position, and the buses of the power distribution room on the side and the opposite side of the open-loop point interval have voltage, the open-loop points are charged at intervals;
the charging of the tripped fault clearing point interval based on the preset second charging logic comprises:
on the main line, if the fault removal point and the open loop point are separated, the rest intervals are closed, and the bus of the power distribution room on the side of the fault removal point interval and the bus of the power distribution room on the opposite side have voltage, the fault removal point is charged at intervals.
7. The fault isolation self-healing device for the power distribution network is characterized by comprising a processor and a storage medium;
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1-3.
8. Computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211025900.2A CN115313375A (en) | 2022-08-25 | 2022-08-25 | Fault isolation self-healing method and device for power distribution network and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211025900.2A CN115313375A (en) | 2022-08-25 | 2022-08-25 | Fault isolation self-healing method and device for power distribution network and storage medium |
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| CN115313375A true CN115313375A (en) | 2022-11-08 |
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