CN107612148B - Distribution network overhead line fault self-healing method and system - Google Patents
Distribution network overhead line fault self-healing method and system Download PDFInfo
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Abstract
The invention provides a distribution network overhead line fault self-healing method and a distribution network overhead line fault self-healing system, which are used for receiving sectional switch fault information, interconnection switch fault information and outlet switch fault information in a management and control area, determining a fault line outlet switch and two feeder automatic switches closest to two ends of a fault position according to the fault information, enabling the two feeder automatic switches closest to the two ends of the fault position to be separated and locked according to the reclosing times of the fault line outlet switch, issuing closing commands to different switches according to the types of the two feeder automatic switches closest to the two ends of the fault position, and recovering line power supply of a non-fault position. Based on this, can adapt to the different reclosing times of the different switch that is qualified for the next round of competitions in the circuit, guarantee fault location's isolation, according to the different grade type condition of two feeder automation switches that are closest to fault location both ends, issue different combined floodgate orders, ensure that non-fault location circuit resumes the power supply, prevent that the switch from throwing and causing once more to have a power failure, can more reliable realization fault self-healing.
Description
Technical Field
The invention relates to the technical field of feeder automation of a power distribution system, in particular to a method and a system for self-healing of faults of overhead lines of a distribution network.
Background
Feeder automation refers to the automatic supervision of distribution network lines between a transformer substation outgoing line and user electric equipment by using a computer technology and a data communication technology, and mainly comprises two aspects: firstly, monitoring the line state under the condition of normal power supply; and secondly, fault detection, fault isolation, transfer and power restoration in a fault state.
According to the traditional fault self-healing method of the feeder automation system, after a fault occurs, a monitoring device is used for collecting fault parameters of all switches on a distribution line and sending the fault parameters to a power distribution main station in a communication mode of a wireless public network, the power distribution main station returns a remote control command by analyzing the fault parameters, a fault area is isolated, a substation outgoing line switch and a tie switch are overlapped, and non-fault area power supply is recovered. When the topological structure of the overhead line of the distribution network is complex, the traditional method can generate errors of line misdelivery, and the power failure range is enlarged. Therefore, the traditional method has poor stability in actual operation, and failure self-healing cannot be realized very reliably.
Disclosure of Invention
Therefore, it is necessary to provide a method and a system for self-healing of a fault of an overhead line of a distribution network, aiming at the problem that the fault self-healing cannot be reliably realized.
On one hand, the embodiment of the invention provides a distribution network overhead line fault self-healing method, which comprises the following steps:
receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a control area and outlet switch fault information sent by outlet switch secondary equipment;
determining a fault line outgoing switch according to the outgoing switch fault information;
determining two feeder automation switches closest to two ends of a fault position according to the fault information of the section switch, the fault information of the interconnection switch and the fault information of the outlet switch;
according to the reclosing times of the outlet switch of the fault line, separating and locking the two feeder automation switches closest to the two ends of the fault position, and isolating a power supply line between the two feeder automation switches closest to the two ends of the fault position;
and issuing a closing command according to the types of the two feeder automatic switches closest to the two ends of the fault position, and recovering the line power supply of the non-fault position.
In one embodiment, the step of receiving the section switch fault information, the interconnection switch fault information and the outgoing switch fault information sent by the outgoing switch secondary device sent by the wireless public network FTU in the management and control area, and the step of determining the outgoing switch of the faulty line according to the outgoing switch fault information includes:
after receiving the fault information of the outgoing line switch, if the fault information of the section switch and the fault information of the interconnection switch are received within the first set time, determining the outgoing line switch of the fault line according to the fault information of the outgoing line switch.
In one embodiment, according to the number of reclosure times of the outlet switch of the fault line, the two feeder automation switches closest to two ends of the fault position are switched off and locked, and the process of isolating the circuit at the fault position comprises the following steps:
and if the reclosing times are zero, transmitting an opening and locking command to the monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position, so that the two feeder automation switches closest to the two ends of the fault position are opened and locked.
In one embodiment, according to the number of reclosure times of the outlet switch of the fault line, the two feeder automation switches closest to two ends of the fault position are switched off and locked, and the process of isolating the circuit at the fault position comprises the following steps:
and if the reclosing times are once, reclosing failure information of the fault line outlet switch is received, and locking and opening signals of the two feeder automatic switches closest to the two ends of the fault position are not received within a second preset time, sending a locking and opening command to the monitoring devices connected with the two feeder automatic switches closest to the two ends of the fault position, so that the two feeder automatic switches closest to the two ends of the fault position are locked.
In one embodiment, according to the types of two feeder automation switches closest to two ends of a fault position, a closing command is issued, and the process of restoring the line power supply of the non-fault position comprises the following steps:
and if the two feeder automation switches closest to the two ends of the fault position do not comprise the fault line outgoing switch, sending a closing command to the outgoing switch secondary equipment connected with the fault line outgoing switch, so that the fault line outgoing switch is closed.
In one embodiment, according to the types of two feeder automation switches closest to two ends of a fault position, a closing command is issued, and the process of restoring the line power supply of the non-fault position comprises the following steps:
receiving an interconnection switch single-side no-voltage delay completion signal sent by a wireless public network FTU in a control area, and determining a fault line interconnection switch according to the interconnection switch single-side no-voltage delay completion signal;
and if the two feeder automation switches closest to the two ends of the fault position do not comprise a fault line interconnection switch, sending a switch-on command to a wireless public network FTU (fiber to the Unit) connected with the fault line interconnection switch, so that the fault line interconnection switch is switched on.
On the other hand, the embodiment of the invention provides a distribution network overhead line fault self-healing system which comprises a distribution automation main station, a feeder automation switch and a monitoring device, wherein the distribution network overhead line fault self-healing main station comprises a main distribution automation main station and a feeder automation switch;
the feeder automation switch comprises a substation outgoing switch, a section switch and a contact switch, and the monitoring device comprises outgoing switch secondary equipment and a wireless public network FTU; the secondary equipment of the outgoing line switch is connected with the outgoing line switch of the transformer substation, each section switch and the interconnection switch are connected with a wireless public network FTU, the secondary equipment of the outgoing line switch is communicated with the automatic power distribution main station through optical fibers, and the wireless public network FTU is wirelessly communicated with the automatic power distribution main station through the wireless public network;
the distribution automation master station is used for executing the distribution network overhead line fault self-healing method.
In one embodiment, the wireless public network FTU includes a multimode communication module, configured to perform multimode wireless public network communication with the master station.
In another aspect, an embodiment of the present invention provides a distribution network overhead line fault self-healing device, including:
the first receiving module is used for receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a control area and outgoing line switch fault information sent by outgoing line switch secondary equipment;
the fault line outgoing switch judging module is used for determining a fault line outgoing switch according to the outgoing switch fault information;
the two-end fault switch judgment module is used for determining two feeder automation switches closest to two ends of a fault position according to the sectional switch fault information, the interconnection switch fault information and the outlet switch fault information;
the fault isolation module is used for locking the two feeder automatic switches closest to two ends of the fault position according to the reclosing times of the fault line outgoing switch;
and the fault recovery module is used for issuing a closing command according to the types of the two feeder line automatic switches closest to the two ends of the fault position and recovering the line power supply of the non-fault position.
In still another aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the above-mentioned distribution network overhead line fault self-healing method.
According to the distribution network overhead line fault self-healing method and system, the fault line contact switch is confirmed through the received contact switch single-side voltage loss delay completion signal, and the method and system are more suitable for confirmation of the fault line contact switch in the actually-used multi-contact switch distribution network structure. When the contact switch position changes in the management and control area of distribution automation main website, also can be accurate find trouble circuit contact switch, prevent to cause the circuit miscarrying because of trouble circuit contact switch discernment mistake, carry the trouble self-healing that can more reliable completion overhead line.
According to the distribution network overhead line fault self-healing method and system, in a distribution network overhead line with a complex topological structure, different reclosing times of different outgoing line switches in the line can be adapted, isolation of a fault position is guaranteed, different closing commands are issued according to different types of two feeder automation switches closest to two ends of the fault position, recovery power supply of a non-fault position line is guaranteed, secondary power failure caused by switch misdelivery is prevented, and fault self-healing can be achieved more reliably.
Drawings
Fig. 1 is a schematic diagram of a distribution network overhead line fault self-healing system according to an embodiment;
fig. 2 is a flow chart of a distribution network overhead line fault self-healing method according to an embodiment;
FIG. 3 is a schematic diagram of a distribution network overhead line of an embodiment;
Detailed Description
For better understanding of the objects, technical solutions and effects of the present invention, the present invention will be further explained with reference to the accompanying drawings and examples. Meanwhile, the following described examples are only for explaining the present invention, and are not intended to limit the present invention.
The embodiment of the invention provides a distribution network overhead line fault self-healing system, as shown in fig. 1, the system comprises: distribution automation master station 100, feeder automation switch 200 and monitoring device 300. The feeder automation switch comprises a substation outlet switch 210, a section switch 220 and a tie switch 230, and the monitoring device comprises outlet switch secondary equipment 310 and a wireless public network FTU 320; the secondary outgoing switch equipment 310 is connected with the outgoing switch 210 of the transformer substation, each section switch 220 and the interconnection switch 230 are connected with a wireless public network FTU320, the secondary outgoing switch equipment 310 is in optical fiber communication with the automatic power distribution main station 100, and the wireless public network FTU320 is in wireless communication with the automatic power distribution main station 100 through a wireless public network;
optionally, the outlet switch secondary device 310 and the distribution automation master station 100 communicate via a power fiber optic data network.
In one embodiment, the public wireless network FTU320 includes a multimode communication module 321 for performing multimode public wireless network communication with the master station.
Specifically, the multimode communication module can perform wireless public network communication in different network systems of different operators.
Before the multi-mode communication module sends information, network signals of different operators are detected, and the network system with the strongest signal is selected for sending the information. By selecting the network system with strong signal, more stable wireless public network wireless communication is realized, and the reliability of the system is improved.
The embodiment of the invention provides a self-healing method for a distribution network overhead line fault, which is described from the perspective of a distribution automation master station 100, and as shown in fig. 2, comprises the following steps:
s101, receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a management and control area and outgoing line switch fault information sent by outgoing line switch secondary equipment;
wherein, the control area assigns the distribution network region of electric automation main website control. The sectional switch fault information is used for reflecting the state of the sectional switch when the fault occurs, and comprises current out-of-limit information, switch displacement information and sectional switch identification information. The outgoing line switch fault information is used for reflecting the state of the outgoing line switch when a fault occurs, and comprises current out-of-limit information, switch displacement information and outgoing line switch identification information. The interconnection switch fault information is used for reflecting the state of the section switch when the fault occurs, and comprises current out-of-limit information, switch displacement information and interconnection switch single-side voltage loss delay starting information.
The current out-of-limit information is information about whether the current at the feeder automation switch exceeds a preset threshold value. The switch displacement information is information of whether the feeder automatic switch has a switching-on action or a switching-off action. The interconnection switch single-side no-voltage delay starting information is information for starting single-side no-voltage delay when the interconnection switch single-side no-voltage is generated.
The outgoing switch identification information is the identification of the outgoing switch, the switch type can be identified as the outgoing switch according to the identification, and the outgoing switches can be distinguished. The identification information of the section switch is the identification of the section switch, and the outlet switches can be distinguished according to the identification. Before the fault self-healing method is executed, switch identification information of distribution network topological structures and various feeder automation switches in a control area is stored in a distribution automation main station.
S102, determining a fault line outgoing switch according to the outgoing switch fault information;
specifically, the outlet switch identification information in the outlet switch fault information is read, and the outlet switch identification information is determined as the outlet switch identification information of the outlet switch of the fault line.
In one embodiment, after receiving the outlet switch fault information, if the section switch fault information is received within a first set time, the outlet switch of the fault line is determined according to the outlet switch fault information.
The overhead line is generally used for long-distance power transmission, the time for the section switches at different positions to send the section switch fault information and the interconnection switch fault information to the power distribution automation master station has a certain time delay, and the receiving time limit is set to ensure that all the section switch fault information and the interconnection switch fault information are received, so that the execution of the method is more stable, and the judgment of the fault position is more accurate.
S103, determining two feeder automation switches closest to two ends of a fault position according to the sectional switch fault information, the interconnection switch fault information and the outlet switch fault information;
specifically, according to a pre-stored distribution network topological structure, current out-of-limit information of outlet switch fault information, interconnection switch fault information and section switch fault information is patrolled from a fault line outlet switch, and two feeder automatic switches closest to two ends of a fault position are judged according to the current out-of-limit information.
And if one current is out of limit and the other current is not out of limit in two feeder automatic switches connected on the line, judging that the fault position is on the line between the two feeder automatic switches, and determining the two feeder automatic switches closest to the two ends of the fault position.
S104, according to the reclosing times of the outlet switch of the fault line, the two feeder automatic switches closest to the two ends of the fault position are separated and locked, and the circuit of the fault position is isolated;
optionally, the outgoing line switch fault information further includes reclosing times of the outgoing line switch, and the received outgoing line switch fault information is read to obtain the reclosing times of the outgoing line switch of the fault line.
Optionally, the distribution automation master station prestores reclosing times of each outgoing line switch in the control area, and queries data in the memory according to outgoing line switch identification information of the outgoing line switch of the fault line to obtain the reclosing times of the outgoing line switch of the fault line.
In one embodiment, if the number of reclosure times is zero, an opening and locking command is sent to the monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position, so that the two feeder automation switches closest to the two ends of the fault position are opened and locked.
In one embodiment, if the number of reclosure times is one, and reclosure failure information of the outlet switch of the fault line is received, and the locking and opening signals of the two feeder automation switches closest to the two ends of the fault position are not received within a second preset time, a locking and opening command is sent to the monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position, so that the two feeder automation switches closest to the two ends of the fault position are locked.
Specifically, when the reclosing times are one, the fault line outlet switch is automatically reclosed, the fault position is electrified again, the two feeder automatic switches closest to the two ends of the fault position respectively perform Y-time-limit separating brake locking and X-time-limit separating brake locking, the fault line outlet switch is separated again, and the reclosing fails. The fault line outlet switch sends reclosing failure information to the distribution automation master station, and the two detection devices connected with the two feeder automation switches closest to two ends of the fault position respectively send Y time-limited separating brake locking signals and X time-limited separating brake locking signals to the distribution automation master station.
And the distribution automation master station receives reclosing failure information of the outlet switch of the fault line, starts timing by second preset time, and sends a locking and separating command to monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position if a Y time limit separating brake locking signal and an X time limit separating brake locking signal of the two feeder automation switches closest to the two ends of the fault position are not received when the timing is finished, so that the two feeder automation switches closest to the two ends of the fault position are locked.
According to the embodiment, different reclosing times can be flexibly adapted, the two feeder line automatic switches closest to two ends of the fault position are guaranteed to be switched off and locked, and the fault isolation is more reliable.
S105, issuing a closing command according to the types of the two feeder line automatic switches closest to the two ends of the fault position, and recovering the line power supply of the non-fault position;
in one embodiment, if the two feeder automation switches closest to the two ends of the fault position do not include the fault line outgoing switch, a switch-on command is sent to the outgoing switch secondary equipment connected with the fault line outgoing switch, so that the fault line outgoing switch is switched on.
Specifically, if the outlet switch identification information of the fault line outlet switch is not found in the switch identification information of the two feeder automation switches closest to the two ends of the fault position, a switching-on command is sent to the outlet switch secondary equipment connected with the fault line outlet switch, so that the fault line outlet switch is switched on, and the power supply from the fault line outlet switch to one side of the fault position is recovered.
In one embodiment, a connection switch single-side no-voltage delay completion signal sent by a wireless public network FTU connected with a connection switch is received, and a fault line connection switch is determined according to the connection switch single-side no-voltage delay completion signal;
specifically, when the circuit breaks down, the fault circuit interconnection switch unilateral decompression begins unilateral decompression time delay, finishes when unilateral decompression time delay, and the wireless public network FTU who is connected with the interconnection switch sends interconnection switch unilateral decompression time delay and accomplishes the signal and the distribution automation master station. The single-side no-voltage delay completion signal comprises single-side no-voltage delay completion information and interconnection switch identification information.
And the distribution automation master station receives the interconnection switch single-side no-voltage delay completion signal and determines the interconnection switch identification information in the interconnection switch single-side no-voltage delay completion signal as the interconnection switch identification information of the fault line interconnection switch.
After the fault line interconnection switch is determined, the two feeder automation switches closest to the two ends of the fault position are judged, if the two feeder automation switches closest to the two ends of the fault position do not comprise the fault line interconnection switch, a switching-on command is sent to a wireless public network FTU connected with the fault line interconnection switch, and the fault line interconnection switch is switched on.
Specifically, if the interconnection switch identification information of the fault line interconnection switch is not found in the switch identification information of the two feeder automation switches closest to the two ends of the fault position, a switch-on command is sent to the wireless public network FTU connected with the fault line interconnection switch, so that the fault line interconnection switch is switched on, and the power supply from the fault line interconnection switch to one side of the fault position is recovered.
Before the power supply of the line at the non-fault position is recovered, whether the two feeder automatic switches closest to the two ends of the fault position are the outlet switches of the fault line or the interconnection switches of the fault line is judged, and a switching-on command is sent according to the judgment result. The risk of power failure once more caused by mistakenly switching on a fault line outlet switch or a fault line contact switch when a non-fault position line recovers power supply is eliminated, different closing operations can be carried out according to fault position sending, power supply recovery of the non-fault position line is guaranteed, and further, fault self-healing of the overhead line is completed more reliably.
The distribution network overhead line fault self-healing method provided by the embodiment can adapt to different reclosing times conditions of a fault line outgoing line switch, guarantees that two feeder automation switches at two ends closest to a fault position are separated and locked, guarantees to isolate the fault position, issues different closing commands according to different types of two feeder automation switches at two ends closest to the fault position, prevents secondary power failure of a non-fault position line caused by switch misdelivery, guarantees that the non-fault position line recovers normal power supply, and can realize more reliable fault self-healing in a distribution network overhead line with a more complex topological structure.
In a specific embodiment, as shown in fig. 3, CB1 and CB2 represent substation outgoing switches, FS1, FS2, FS3 and FS4 represent section switches, and LS represents tie switches. Assume that the fault occurred at the f1 location.
When a fault occurs, CB1 and FS1 are subjected to overcurrent tripping, FS2 is subjected to voltage loss tripping, and LS single side is subjected to voltage loss. The secondary equipment of the outgoing switch connected with the CB1 sends the fault information of the outgoing switch of the CB1 to the automatic power distribution main station, and the FTU of the wireless public network connected with the FS1 sends the fault information of the FS1 sectional switch to the automatic power distribution main station. And the wireless public network FTU connected with the FS2 sends FS2 sectional switch fault information to the power distribution automation master station. And the FTU starts to connect the switch single-side voltage loss delay and sends the fault information of the connection switch to the distribution automation master station.
After receiving the outgoing line switch fault information of the CB1, the distribution automation master station starts timing by a first set time, and if the sectional switch fault information of FS1 and FS2 and the outgoing line switch identification information of the LS are received when the timing is finished, the outgoing line switch identification information in the outgoing line switch fault information of the CB1 is read, and the CB1 is determined to be a fault line outgoing line switch.
According to a pre-stored distribution network topological structure, the distribution automation master station starts to patrol the outgoing switch fault information of the CB1 and the current out-of-limit information of the fault information of the FS1 and FS2 section switches from a fault line outgoing switch CB1, detects that the FS1 current is out of limit and the FS2 current is not out of limit, judges that a fault position f1 is on a line between the FS1 and the FS2, and the FS1 and the FS2 are two feeder automation switches closest to two ends of the fault position.
The power distribution automation main station prestores reclosing times of CB1 and CB2, and acquires the reclosing times of CB 1.
If the reclosing times of the CB1 are zero, the distribution automation master station respectively sends an opening closing locking command to the wireless public network FTU connected with the FS1 and the FS2, and the FS1 and the FS2 are opened and closed.
If the reclosing frequency of the CB1 is one, the outgoing switch secondary equipment connected with the CB1 controls the CB1 to be reclosed, when the current is switched on to f1, the CB1 and the FS1 are opened again, the reclosing fails, and the FS1 and the FS2 are respectively locked by Y time-limit opening and X time-limit opening. The secondary equipment of the outgoing line switch connected with the CB1 sends CB1 reclosing failure information to the distribution automation master station, the wireless public network FTU connected with the FS1 sends a Y time-limit opening locking signal of the FS1 to the distribution automation master station, and the wireless public network FTU connected with the FS2 sends an X time-limit opening locking signal of the FS2 to the distribution automation master station.
After receiving the reclosing failure information of the CB1, the distribution automation master station starts timing by a second preset time, and if a Y time-limit separating brake locking signal and an X time-limit separating brake locking signal of FS1 and FS2 are not received when the timing is ended, a locking separating brake command is respectively sent to a wireless public network FTU connected with FS1 and FS2, so that FS1 and FS2 are locked.
The distribution automation master station receives an interconnection switch single-side no-voltage delay completion signal sent by a wireless public network FTU connected with the LS, acquires interconnection switch identification information in the interconnection switch single-side no-voltage delay completion signal, and determines that the interconnection switch of the fault line is the LS.
The distribution automation main station detects switch identification information of FS1 and FS2, wherein the outlet switch identification information of CB1 does not exist, and sends a closing command to outlet switch secondary equipment connected with CB1 to close CB 1.
The distribution automation master station detects switch identification information of FS1 and FS2, wherein contact switch identification information of LS is not available, and sends a closing command to a wireless public network FTU connected with the LS to close the LS.
Correspondingly, an embodiment of the present invention further provides a distribution network overhead line fault self-healing device, including:
the first receiving module is used for receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a control area and outgoing line switch fault information sent by outgoing line switch secondary equipment;
the fault line outgoing switch judging module is used for determining a fault line outgoing switch according to the outgoing switch fault information;
the two-end fault switch judgment module is used for determining two feeder automation switches closest to two ends of a fault position according to the sectional switch fault information, the interconnection switch fault information and the outlet switch fault information;
the fault isolation module is used for separating and locking the two feeder automatic switches closest to the two ends of the fault position according to the reclosing times of the outlet switch of the fault line, and isolating a power supply line between the two feeder automatic switches closest to the two ends of the fault position;
and the fault isolation module is used for issuing a closing command according to the types of the two feeder line automatic switches closest to the two ends of the fault position and recovering the line power supply of the non-fault position.
In one embodiment, the first receiving module comprises:
the outgoing switch fault receiving module is used for receiving outgoing switch fault information sent by the outgoing switch secondary equipment;
the first timing module is used for timing a first set time;
and the section switch fault receiving module is used for receiving outlet switch fault information sent by the wireless public network FTU.
In one embodiment, the fault isolation module comprises:
the reclosing frequency acquisition module is used for acquiring the reclosing frequency of the fault line outgoing switch;
the reclosing result receiving module is used for receiving reclosing failure information of the fault line outgoing switch;
the second timing module is used for timing a second set time;
the switching-off locking signal receiving module is used for receiving locking switching-off signals of two feeder automatic switches closest to two ends of a fault position;
and the opening command sending module is used for sending an opening locking command to the monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position, so that the two feeder automation switches closest to the two ends of the fault position are locked in an opening mode.
In one embodiment, the fault isolation module comprises:
the first fault recovery judging module is used for judging whether the two feeder automation switches closest to the two ends of the fault position comprise a fault line outgoing switch or not;
the first fault recovery module is used for sending a closing command to secondary equipment of the outlet switch connected with the outlet switch of the fault line so as to close the outlet switch of the fault line;
in one embodiment, the fault isolation module comprises:
the second receiving module is used for receiving a tie switch single-side voltage loss delay completion signal sent by the tie switch;
the fault line interconnection switch judgment module is used for determining a fault line interconnection switch according to the interconnection switch single-side voltage loss delay completion signal;
the second fault recovery judging module is used for judging whether the two feeder automation switches closest to the two ends of the fault position comprise a fault line interconnection switch or not;
and the second fault recovery module is used for sending a closing signal to the wireless public network FTU connected with the fault line interconnection switch so as to close the fault line interconnection switch.
The distribution network overhead line fault self-healing device provided by the embodiment of the invention can execute the distribution network overhead line fault self-healing method, has the functional modules for executing the method and the corresponding beneficial effects, and the process of executing the method by each functional module is not repeated here.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to realize the steps of the distribution network overhead line fault self-healing method. Receiving the fault information of various switches in the management and control area, judge two feeder automation switches of fault line outgoing line switch and closest fault position both ends, can adapt to the different reclosing times condition of fault line outgoing line switch, guarantee two feeder automation switch separating brake shutting at closest fault position both ends, guarantee to keep apart the fault position, according to the different grade type condition of two feeder automation switches at closest fault position both ends, assign different combined floodgate orders, prevent to cause the blackout once more of non-fault position circuit because of switch misconnection, guarantee that non-fault position circuit resumes normal power supply, can realize more reliable realization fault self-healing in the comparatively complicated distribution network overhead line of topological structure.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A distribution network overhead line fault self-healing method is characterized by comprising the following steps:
receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a control area and outlet switch fault information sent by outlet switch secondary equipment; the section switch fault information comprises current out-of-limit information; the outlet switch fault information comprises current out-of-limit information; the tie switch fault information includes current out-of-limit information;
determining a fault line outgoing switch according to the outgoing switch fault information;
determining two feeder automation switches closest to two ends of a fault position according to current out-of-limit information in the sectional switch fault information, current out-of-limit information in the interconnection switch fault information and current out-of-limit information in the outlet switch fault information;
according to the reclosing times of the fault line outlet switch, the two feeder automatic switches closest to the two ends of the fault position are separated and locked, and a power supply line between the two feeder automatic switches closest to the two ends of the fault position is isolated;
and issuing a closing command according to the types of the two feeder line automatic switches closest to the two ends of the fault position, and recovering the line power supply of the non-fault position.
2. The distribution network overhead line fault self-healing method according to claim 1, wherein the process of receiving section switch fault information, interconnection switch fault information and outgoing line switch fault information sent by a secondary outgoing line switch device sent by a wireless public network FTU in a management and control area and determining a faulty line outgoing line switch according to the outgoing line switch fault information comprises:
after receiving the outgoing line switch fault information, if the section switch fault information and the interconnection switch fault information are received within a first set time, determining a fault line outgoing line switch according to the outgoing line switch fault information.
3. The distribution network overhead line fault self-healing method according to claim 2, wherein according to the number of reclosure times of the fault line outgoing line switch, the two feeder automation switches closest to the two ends of the fault position are switched off and locked, and the process of isolating the fault position circuit includes:
and if the reclosing times are zero, transmitting an opening and locking command to the monitoring devices connected with the two feeder automation switches closest to the two ends of the fault position, so that the two feeder automation switches closest to the two ends of the fault position are opened and locked.
4. The distribution network overhead line fault self-healing method according to claim 2, wherein according to the number of reclosure times of the fault line outgoing line switch, the two feeder automation switches closest to the two ends of the fault position are switched off and locked, and the process of isolating the fault position circuit includes:
and if the reclosing times are once, reclosing failure information of the fault line outlet switch is received, and locking and opening signals of the two feeder automatic switches closest to the two ends of the fault position are not received within a second preset time, sending a locking and opening command to the monitoring devices connected with the two feeder automatic switches closest to the two ends of the fault position, so that the two feeder automatic switches closest to the two ends of the fault position are locked.
5. The distribution network overhead line fault self-healing method according to claim 3 or 4, wherein according to the types of the two feeder automation switches closest to the two ends of the fault location, a closing command is issued, and the process of restoring the line power supply at the non-fault location comprises:
and if the two feeder automation switches closest to the two ends of the fault position do not comprise the fault line outlet switch, sending a switching-on command to the outlet switch secondary equipment connected with the fault line outlet switch, so that the fault line outlet switch is switched on.
6. The distribution network overhead line fault self-healing method according to claim 3 or 4, wherein according to the types of the two feeder automation switches closest to the two ends of the fault location, a closing command is issued, and the process of restoring the line power supply at the non-fault location comprises:
receiving an interconnection switch single-side voltage loss delay completion signal sent by the FTU in the control area, and determining a fault line interconnection switch according to the interconnection switch single-side voltage loss delay completion signal;
and if the two feeder automation switches closest to the two ends of the fault position do not comprise the fault line interconnection switch, sending a switching-on command to the wireless public network FTU connected with the fault line interconnection switch, so that the fault line interconnection switch is switched on.
7. A distribution network overhead line fault self-healing system is characterized by comprising a distribution automation main station, a feeder automation switch and a monitoring device;
the feeder automation switch comprises a substation outgoing switch, a section switch and a contact switch, and the monitoring device comprises outgoing switch secondary equipment and a wireless public network FTU; the outgoing switch secondary equipment is connected with the outgoing switches of the transformer substation, each section switch and the interconnection switch are connected with one wireless public network FTU, the outgoing switch secondary equipment is communicated with the distribution automation main station through optical fibers, and the wireless public network FTU is wirelessly communicated with the distribution automation main station through a wireless public network;
the distribution network overhead line fault self-healing method is used for executing the distribution network overhead line fault self-healing method according to any one of claims 1 to 6.
8. The system according to claim 7, wherein the FTU comprises a multimode communication module for multimode wireless public network communication with the master station.
9. The utility model provides a join in marriage net overhead line fault self-healing device which characterized in that includes:
the first receiving module is used for receiving sectional switch fault information and interconnection switch fault information sent by a wireless public network FTU in a control area and outgoing line switch fault information sent by outgoing line switch secondary equipment; the section switch fault information comprises current out-of-limit information; the outlet switch fault information comprises current out-of-limit information; the tie switch fault information includes current out-of-limit information;
the fault line outgoing switch judging module is used for determining a fault line outgoing switch according to the outgoing switch fault information;
the fault two-end switch judgment module is used for determining two feeder automation switches which are closest to two ends of a fault position according to current out-of-limit information in the sectional switch fault information, current out-of-limit information in the interconnection switch fault information and current out-of-limit information in the outlet switch fault information;
the fault isolation module is used for locking the two feeder automatic switches at two ends closest to the fault position according to the reclosing times of the fault line outlet switch;
the second receiving module is used for receiving a contact switch single-side voltage loss delay completion signal sent by the FTU in the control area;
and the fault recovery module is used for issuing a closing command according to the types of the two feeder line automatic switches closest to the two ends of the fault position and recovering the line power supply of the non-fault position.
10. A 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 6.
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| CN116260135A (en) * | 2019-12-31 | 2023-06-13 | 国网河北省电力有限公司雄安新区供电公司 | Rapid self-healing method for faults of power distribution network main line |
| CN111327121A (en) * | 2020-04-14 | 2020-06-23 | 广东电网有限责任公司 | Automatic and communication planning system |
| CN113156265A (en) * | 2021-03-29 | 2021-07-23 | 贵州电网有限责任公司 | Fault detection method and system for batch transfer of feeder lines of power distribution network |
| CN113541109B (en) * | 2021-07-02 | 2024-06-25 | 国网浙江省电力有限公司金华供电公司 | Feeder fault processing system and method based on power wireless private network |
| CN114362374B (en) * | 2022-03-16 | 2022-06-21 | 广东电网有限责任公司珠海供电局 | Method and system for preventing tie switch from closing after active load shedding in distribution network |
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