CN107612148A - Distribution network overhead line fault self-healing method and system - Google Patents

Abstract

The invention provides a fault self-healing method and system for an overhead line in a distribution network, which receives segmental switch fault information, contact switch fault information, and outgoing line switch fault information in the control area, and determines the faulty line outgoing line switch and the closest fault according to the above fault information The two feeder automatic switches at both ends of the location, according to the reclosing times of the outgoing line switches of the faulty line, make the two feeder automatic switches closest to the two ends of the fault location open and lock, Type, issue a closing command to different switches to restore power to the line in the non-faulted position. Based on this, it can adapt to the different reclosing times of different outlet switches in the line to ensure the isolation of the fault location. According to the different types of the two feeder automatic switches closest to the two ends of the fault location, different closing orders are issued to ensure the non-fault location The power supply of the line is restored to prevent another power outage caused by the wrong switching of the switch, and it can realize fault self-healing more reliably.

Description

Fault self-healing method and system for overhead line of distribution network

technical field

The invention relates to the technical field of power distribution system feeder automation, in particular to a fault self-healing method and system for an overhead line of a distribution network.

Background technique

Feeder automation refers to the use of computer technology and data communication technology to automate the supervision of distribution network lines between substation outgoing lines and user electrical equipment. It mainly includes two aspects: one is line status monitoring under normal power supply conditions; the other is Fault detection, fault isolation, transfer and restoration of power in fault conditions.

The fault self-healing method of the traditional feeder automation system is to use the monitoring device to collect the fault parameters of each switch on the distribution line after the fault occurs, and send the fault parameters to the main power distribution station through the communication mode of the wireless public network. The substation returns the remote control command by analyzing the fault parameters, isolates the fault area, and closes the outgoing line switch and contact switch of the substation to restore the power supply in the non-fault area. When the topology of overhead lines in the distribution network is relatively complex, the traditional method will cause errors in line miscommunication and expand the scope of power outages. Therefore, the traditional method has poor stability in actual operation, and cannot achieve fault self-healing very reliably.

Contents of the invention

Based on this, it is necessary to provide a fault self-healing method and system for an overhead line in a distribution network for the above-mentioned problem that the fault self-healing cannot be reliably realized.

On the one hand, an embodiment of the present invention provides a fault self-healing method for an overhead line of a distribution network, including steps:

Receive the section switch fault information sent by the wireless public network FTU in the control area, the contact switch fault information and the outgoing line switch fault information sent by the secondary equipment of the outgoing line switch;

Determine the outgoing line switch of the faulty line according to the outgoing line switch fault information;

Determine the two feeder automation switches closest to the two ends of the fault location according to the fault information of the section switch, tie switch and outlet switch;

According to the reclosing times of the outgoing switch of the faulty line, the two feeder automatic switches closest to the two ends of the fault location are opened and locked, and the power supply line between the two feeder automatic switches closest to the two ends of the fault location is isolated;

Depending on the type of the two feeder automation switches closest to the two ends of the fault location, a closing command is issued to restore power to the line at the non-fault location.

In one of the embodiments, the section switch fault information sent by the wireless public network FTU in the control area, the tie switch fault information and the outgoing line switch fault information sent by the secondary equipment of the outgoing line switch are received, and the outgoing line of the faulty line is determined according to the outgoing line switch fault information The switching process includes:

After receiving the fault information of the outgoing line switch, if the section switch fault information and the tie switch fault information are received within the first set time, then the outgoing line switch of the faulty line is determined according to the outgoing line switch fault information.

In one of the embodiments, according to the reclosing times of the outlet switch of the faulty line, the two automatic feeder switches closest to the two ends of the faulty position are opened and locked, and the process of isolating the circuit at the faulty position includes:

If the number of reclosing times is zero, an opening and locking command is sent to the monitoring device connected to 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 opened and locked.

In one of the embodiments, according to the reclosing times of the outlet switch of the faulty line, the two automatic feeder switches closest to the two ends of the faulty position are opened and locked, and the process of isolating the circuit at the faulty position includes:

If the number of reclosing is one time, and the reclosing failure information of the outlet switch of the faulty line is received, and the blocking and opening signals of the two feeder automatic switches closest to the two ends of the fault position are not received within the second preset time, then the blocking is sent The opening command is sent to the monitoring device connected to the two feeder automatic switches closest to the two ends of the fault location, so that the two feeder automatic switches closest to the two ends of the fault location are opened and locked.

In one of the embodiments, according to the types of the two feeder automatic switches closest to the two ends of the fault location, a closing command is issued, and the process of restoring power supply to the line at the non-fault location includes:

If the two feeder automatic switches closest to the two ends of the fault location do not include the faulty line outlet switch, then send a closing command to the secondary device of the outlet switch connected to the faulty line outlet switch, so that the faulty line outlet switch is closed.

In one of the embodiments, according to the types of the two feeder automatic switches closest to the two ends of the fault location, a closing command is issued, and the process of restoring power supply to the line at the non-fault location includes:

Receive the unilateral voltage loss delay completion signal of the contact switch sent by the wireless public network FTU in the control area, and determine the fault line contact switch according to the unilateral voltage loss delay completion signal of the contact switch;

If the two feeder automatic switches closest to the two ends of the fault location do not include the fault line tie switch, a closing command is sent to the wireless public network FTU connected to the fault line tie switch to close the fault line tie switch.

On the other hand, an embodiment of the present invention provides a fault self-healing system for an overhead line in a distribution network, including a distribution automation master station, a feeder automation switch, and a monitoring device;

The feeder automatic switch includes substation outgoing line switch, section switch and tie switch. The monitoring device includes the secondary equipment of the outgoing line switch and the wireless public network FTU; the secondary equipment of the outgoing line switch is connected to the outgoing line switch of the substation, and each section switch and tie switch are connected to a wireless The public network FTU, the secondary equipment of the outlet switch and the distribution automation master station communicate through optical fiber, and the wireless public network FTU communicates with the distribution automation master station through the wireless public network;

The distribution automation master station is used to implement the above method for self-healing of faults in the overhead lines of the distribution network.

In one embodiment, the wireless public network FTU includes a multi-mode communication module for performing multi-mode wireless public network communication with the main station.

In yet another aspect, an embodiment of the present invention provides a fault self-healing device for an overhead line in a distribution network, including:

The first receiving module is used to receive the section switch failure information sent by the wireless public network FTU in the control area, the connection switch failure information and the outlet switch failure information sent by the outlet switch secondary equipment;

A faulty line outlet switch judging module is used to determine the faulty line outlet switch according to the fault information of the outlet switch;

The switch judging module at both ends of the fault is used to determine the two feeder automatic switches closest to the two ends of the fault position according to the fault information of the section switch, the fault information of the tie switch and the fault information of the outlet switch;

The fault isolation module is used to open and lock the two feeder automation switches closest to the two ends of the fault location according to the reclosing times of the fault line outlet switch;

The fault recovery module is used to issue a closing command according to the types of the two feeder automatic switches closest to the two ends of the fault position, so as to restore the line power supply at the non-fault position.

In yet another aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned method for self-healing a distribution network overhead line fault are implemented.

The above method and system for fault self-healing of the overhead line of the distribution network confirms the faulty line contact switch through the received delay completion signal of the unilateral voltage loss of the contact switch, which is more suitable for the confirmation of the faulty line contact switch in the multi-connection switch distribution network structure actually put into use. . When the position of the contact switch in the control area of the distribution automation master station is changed, it can also accurately find the contact switch of the faulty line, prevent the faulty line contact switch from being identified incorrectly, causing the line to be switched incorrectly, and can more reliably complete the fault of the overhead line self-healing.

The above fault self-healing method and system for distribution network overhead lines can adapt to different reclosing times of different outlet switches in the distribution network overhead lines with a relatively complex topology, and ensure the isolation of fault locations. For different types of automatic switches of the two feeders, different closing orders are issued to ensure that the power supply of the non-faulted line is restored, and to prevent another power outage caused by the wrong switching of the switch, which can realize fault self-healing more reliably.

Description of drawings

Fig. 1 is a schematic diagram of a fault self-healing system for an overhead line of a distribution network according to an embodiment;

Fig. 2 is a flow chart of a self-healing method for faults of distribution network overhead lines according to an embodiment;

Fig. 3 is the schematic diagram of the distribution network overhead line of an embodiment;

detailed description

In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.

An embodiment of the present invention provides a fault self-healing system for an overhead line in a distribution network. As shown in FIG. The feeder automatic switch includes a substation outlet switch 210, a section switch 220, and a tie switch 230. The monitoring device includes an outlet switch secondary device 310 and a wireless public network FTU320; the outlet switch secondary device 310 is connected to the substation outlet switch 210, and each section switch 220 and contact switch 230 are connected to a wireless public network FTU320, the outgoing switch secondary device 310 communicates with the distribution automation master station 100 through optical fiber, and the wireless public network FTU320 communicates wirelessly with the distribution automation master station 100 through the wireless public network;

Optionally, the outgoing line switch secondary device 310 communicates with the distribution automation master station 100 through a power optical fiber data network.

In one embodiment, the wireless public network FTU 320 includes a multi-mode communication module 321 for performing multi-mode wireless public network communication with the main station.

Specifically, the multi-mode communication module can perform wireless public network communication under the network standards of different operators.

Before the multi-mode communication module sends information, it detects the network signals of different operators, and selects the network standard with the strongest signal for information transmission. By selecting a network system with a strong signal, a more stable wireless public network wireless communication is realized, and the reliability of the system is improved.

An embodiment of the present invention provides a fault self-healing method for an overhead line in a distribution network. This embodiment is described from the perspective of a distribution automation master station 100, as shown in FIG. 2 , including the following steps:

S101. Receive segment switch fault information, contact switch fault information and outgoing line switch fault information sent by the secondary equipment of the outgoing line switch sent by the wireless public network FTU in the control area;

Among them, the control area refers to the distribution network area controlled by the distribution automation master station. The section switch fault information is used to reflect the state of the section switch when a fault occurs, including current limit information, switch displacement information and section switch identification information. The outgoing switch fault information is used to reflect the state of the outgoing switch when a fault occurs, including current limit information, switch displacement information, and outgoing switch identification information. The fault information of the tie switch is used to reflect the status of the section switch when the fault occurs, including the current limit information, the switch displacement information and the delay start information of the one-side voltage loss of the tie switch.

The current over-limit information is information on whether the current at the automatic switch of the feeder exceeds a preset threshold. The switch displacement information is the information of whether the feeder automatic switch has a closing action or an opening action. The start information of the one-side voltage loss delay of the tie switch is the information of the one-side voltage loss delay time of the tie switch when one side loses voltage.

The outgoing switch identification information is the self-identification of the outgoing switch. According to this identification, the switch type can be identified as an outgoing switch, and each outgoing switch can be distinguished. The subsection switch identification information is the subsection switch's own identification, and each outlet switch can be distinguished according to this identification. Before the implementation of the fault self-healing method, the distribution network topology in the control area and the switch identification information of various feeder automation switches are stored in the distribution automation master station.

S102. Determine the outgoing line switch of the faulty line according to the outgoing line switch fault information;

Specifically, the outgoing line switch identification information in the outgoing line switch fault information is read, and the above outgoing line switch identification information is determined as the outgoing line switch identification information of the faulty line outgoing line switch.

In one embodiment, after receiving the fault information of the outgoing line switch, if the segmental switch fault information is received within the first set time, the outgoing line switch of the faulty line is determined according to the fault information of the outgoing line switch.

Overhead lines are generally used for long-distance power transmission. There is a certain delay in the time for the sub-section switches at different positions to send the sub-section switch fault information and the contact switch fault information to the distribution automation master station. Setting the receiving time limit can ensure the receiving time. Fault information of all subsection switches and tie switches can be obtained, so that the execution of the method is more stable and the judgment of the fault location is more accurate.

S103. Determine the two feeder automatic switches closest to the two ends of the fault location according to the fault information of the section switch, the fault information of the tie switch, and the fault information of the outlet switch;

Specifically, according to the pre-stored distribution network topology, starting from the outgoing switch of the faulty line, the fault information of the outgoing line switch, the fault information of the tie switch and the fault information of the section switch are inspected for the current exceeding the limit information, and the closest fault location is judged according to the current exceeding the limit information Two feeder automation switches at both ends.

If it is detected that among the two feeder automatic switches connected on the line, one current exceeds the limit and the other current does not exceed the limit, then it is determined that the fault location is on the line between the two feeder automatic switches, and the two closest to the fault location are determined. Two feeder automation switches at the end.

S104, according to the reclosing times of the outgoing line switch of the faulty line, make the two feeder automation switches closest to the two ends of the faulty position open and lock, and isolate the circuit at the faulty position;

Optionally, the fault information of the outgoing line switch also includes the reclosing times of the outgoing line switch, and the received fault information of the outgoing line switch is read to obtain the reclosing times of the outgoing line switch of the faulty line.

Optionally, the power distribution automation master station pre-stores the reclosing times of each outgoing switch in the control area, and queries the data in the memory according to the outgoing switch identification information of the faulty line outgoing switch to obtain the reclosing times of the faulty line outgoing switch.

In one of the embodiments, if the number of reclosing times is zero, an opening and locking command is sent to the monitoring device connected to the two feeder automation switches closest to the two ends of the fault location, so that the two feeder automation switches closest to the two ends of the fault location are automated. The switch is opened and locked.

In one of the embodiments, if the number of times of reclosing is one, and the reclosing failure information of the outgoing switch of the faulty line is received, the locking of the two feeder automatic switches closest to the two ends of the fault location is not received within the second preset time The opening signal sends a locking and opening command to the monitoring device connected to 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 opened and locked.

Specifically, when the number of reclosing is one time, the outlet switch of the faulty line is automatically reclosed, and the faulty location is powered on again, and the two feeder automatic switches closest to the two ends of the faulty location perform Y-time limit opening and locking and X-time-limiting opening and locking respectively, and the faulty line The outlet switch opened again, and the reclosing failed. The outlet switch of the faulty line sends the reclosing failure information to the distribution automation master station, and the two detection devices connected to the two feeder automation switches closest to the fault location respectively send the Y time limit opening and closing signal and the X time limit opening and closing signal to the distribution automation master station. Distribution automation master station.

The distribution automation master station receives the reclosing failure information of the faulty line outlet switch, and starts the second preset time timing. If the timing ends, it does not receive the Y time limit opening and closing signals of the two feeder automation switches closest to the two ends of the fault location. and X time limit opening and locking signals, then send a locking and opening command to the monitoring device connected to 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 opened and locked.

The above embodiment can flexibly adapt to different reclosing times, and ensure that the two feeder automatic switches closest to the two ends of the fault location are opened and locked, so that the fault isolation is more reliable.

S105, according to the types of the two feeder automatic switches closest to the two ends of the fault location, issue a closing command to restore the line power supply at the non-fault location;

In one of the embodiments, if the two feeder automation switches closest to the two ends of the fault location do not include the fault line outlet switch, then a closing command is sent to the secondary device of the outlet switch connected to the fault line outlet switch, so that the fault line goes out The switch is closed.

Specifically, if the outgoing switch identification information of the outgoing line switch of the faulty line is not found in the switch identification information of the two feeder automatic switches closest to the two ends of the fault location, then the closing command is sent to the secondary equipment of the outgoing line switch connected to the outgoing line switch of the faulty line , so that the outlet switch of the fault line is closed, and the power supply to the side of the fault location is restored from the outlet switch of the fault line.

In one of the embodiments, receiving the unilateral voltage loss delay completion signal of the tie switch sent by the wireless public network FTU connected to the tie switch, and determining the faulty line tie switch according to the unilateral voltage loss delay completion signal of the tie switch;

Specifically, when the line fails, the faulty line tie switch loses voltage on one side, and when the one-side voltage loss delay starts, when the one-side voltage loss delay ends, the wireless public network FTU connected to the tie switch sends the one-side voltage loss delay of the tie switch to complete Signal to distribution automation master station. The unilateral voltage loss delay completion signal includes unilateral voltage loss delay completion information and tie switch identification information.

The master station of distribution automation receives the unilateral voltage loss delay completion signal of the tie switch, and determines the tie switch identification information in the unilateral voltage loss delay completion signal of the tie switch as the tie switch identification information of the faulty line tie switch.

After determining the fault line tie switch, judge the two feeder automatic switches closest to the two ends of the fault position. If the two feeder automatic switches closest to the fault position do not include the fault line tie switch, send the closing command to the fault line. The wireless public network FTU connected to the line tie switch makes the faulty line tie switch close.

Specifically, if the tie switch identification information of the fault line tie switch is not found in the switch identification information of the two feeder automatic switches closest to the two ends of the fault location, then the closing command is sent to the wireless public network FTU connected to the fault line tie switch, The fault line tie switch is closed, and the power supply to the fault position side of the fault line tie switch is restored.

Before the power supply of the line at the non-fault position is restored, judge whether the two feeder automatic switches closest to the two ends of the fault position are the outgoing switch of the fault line or the contact switch of the fault line, and send the closing command according to the judgment result. It eliminates the risk of another power outage caused by mistakenly switching the outlet switch of the faulty line or the contact switch of the faulty line when the power supply of the non-faulty position line is restored, and can perform different closing operations according to the faulty position to ensure that the power supply of the non-faulty position line is restored. Further, more Reliably complete the fault self-healing of overhead lines.

The fault self-healing method for the overhead line of the distribution network provided by this embodiment can adapt to the different reclosing times of the outgoing line switch of the faulty line, and ensure that the two feeder automation switches closest to the two ends of the fault location are opened and locked to ensure the isolation of the fault location. For the different types of automatic switches of the two feeders closest to the two ends of the fault location, different closing orders are issued to prevent the power failure of the non-fault location line due to the wrong switching of the switch, and ensure that the non-fault location line resumes normal power supply. More reliable fault self-healing is achieved in the more complex distribution network overhead lines.

A specific embodiment is shown in Figure 3, in which CB1 and CB2 represent substation outlet switches, FS1, FS2, FS3 and FS4 represent section switches, and LS represents tie switches. Assume the fault occurs at f1 position.

When a fault occurs, CB1 and FS1 will be tripped by overcurrent, FS2 will be tripped by voltage loss, and LS will lose voltage on one side. The secondary equipment of the outlet switch connected to CB1 sends the failure information of the outlet switch of CB1 to the distribution automation master station, and the wireless public network FTU connected to FS1 sends the fault information of the FS1 section switch to the distribution automation master station. The wireless public network FTU connected to FS2 sends FS2 section switch failure information to the distribution automation master station. The wireless public network FTU connected to the LS starts to delay the voltage loss on one side of the contact switch, and sends the fault information of the contact switch to the distribution automation master station.

After the main station of distribution automation receives the failure information of the outgoing line switch of CB1, it starts to count the first set time. Obtain the outgoing line switch identification information in the outgoing line switch fault information of CB1, and determine that CB1 is the outgoing line switch of the faulty line.

According to the pre-stored distribution network topology, the distribution automation master station starts to inspect the fault information of the outlet switch of CB1 from the faulty line outlet switch CB1, and the current over-limit information to the distribution automation master station and FS1 and FS2 segment switch fault information , it is detected that the FS1 current exceeds the limit, but the FS2 current does not exceed the limit, and it is determined that the fault location f1 is on the line between FS1 and FS2, and FS1 and FS2 are two feeder automatic switches closest to the two ends of the fault location.

The reclosing times of CB1 and CB2 are pre-stored in the distribution automation master station, and the reclosing times of CB1 are obtained.

If the number of reclosing times of CB1 is zero, the master station of distribution automation sends the opening and locking commands to the wireless public network FTUs connected to FS1 and FS2, so that FS1 and FS2 are opened and locked.

If the reclosing times of CB1 is one time, the secondary equipment of the outlet switch connected to CB1 controls the reclosing of CB1. When the current is connected to f1, CB1 and FS1 are opened again, and reclosing fails, and FS1 and FS2 are respectively opened in Y time limit. Blocking and X time limit opening blocking. The secondary equipment of the outlet switch connected to CB1 sends CB1 reclosing failure information to the main station of distribution automation, and the wireless public network FTU connected to FS1 sends the Y time limit opening and locking signal of FS1 to the main station of distribution automation, and the FTU connected to FS2 The wireless public network FTU sends the X-time limit opening and locking signal of FS2 to the distribution automation master station.

After receiving the reclosing failure information of CB1, the distribution automation master station starts the second preset time timing. If the Y time limit opening and closing signal and the X time limit opening and closing signal of FS1 and FS2 are not received at the end of the time, respectively Send the locking and opening command to the wireless public network FTU connected to FS1 and FS2 to make FS1 and FS2 open and lock.

The distribution automation master station receives the unilateral voltage loss delay completion signal of the tie switch sent by the wireless public network FTU connected to the LS, obtains the tie switch identification information in the unilateral voltage loss delay completion signal of the tie switch, and determines that the tie switch of the fault line is LS.

The distribution automation master station detects the switch identification information of FS1 and FS2, and there is no identification information of the outgoing switch of CB1, and sends a closing command to the secondary equipment of the outgoing switch connected to CB1 to close CB1.

The distribution automation master station detects the switch identification information of FS1 and FS2, and there is no contact switch identification information of LS, and sends a closing command to the wireless public network FTU connected to LS to close LS.

Correspondingly, the embodiment of the present invention also provides a fault self-healing device for overhead lines of distribution networks, including:

The first receiving module is used to receive the section switch failure information sent by the wireless public network FTU in the control area, the connection switch failure information and the outlet switch failure information sent by the outlet switch secondary equipment;

The fault line outgoing switch judging module determines the faulty line outgoing switch according to the fault information of the outgoing switch;

The switch judging module at both ends of the fault determines the two feeder automatic switches closest to the two ends of the fault position according to the fault information of the section switch, the fault information of the tie switch and the fault information of the outlet switch;

The fault isolation module, according to the reclosing times of the faulty line outlet switch, makes the two feeder automatic switches closest to the two ends of the fault position open and lock, and isolates the power supply line between the two feeder automatic switches closest to the fault position;

The fault isolation module is used to issue a closing command according to the types of the two feeder automatic switches closest to the two ends of the fault position, so as to restore the power supply of the line at the non-fault position.

In one of the embodiments, the first receiving module includes:

The outgoing line switch fault receiving module is used to receive the outgoing line switch fault information sent by the secondary equipment of the outgoing line switch;

The first timing module is used to execute the timing of the first set time;

The segment switch fault receiving module is used to receive the outgoing switch fault information sent by the wireless public network FTU.

In one of the embodiments, the fault isolation module includes:

The reclosing times acquisition module is used to obtain the reclosing times of the outgoing switch of the faulty line;

The reclosing result receiving module is used to receive the reclosing failure information of the outgoing switch of the faulty line;

The second timing module is used to perform the timing of the second set time;

The opening and locking signal receiving module is used to receive the locking and opening signals of the two feeder automatic switches closest to the two ends of the fault location;

The opening command sending module is used to send an opening and locking command to the monitoring device connected to 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 opened and locked.

In one of the embodiments, the fault isolation module includes:

The first fault recovery judging module is used to judge whether the two feeder automatic switches closest to the two ends of the fault location include a fault line outlet switch;

The first fault recovery module is used to send a closing command to the secondary device of the outgoing switch connected to the outgoing switch of the faulty line, so that the outgoing switch of the faulty line is closed;

In one of the embodiments, the fault isolation module includes:

The second receiving module is used to receive the unilateral voltage loss delay completion signal of the tie switch sent by the tie switch;

Faulty line tie switch judging module, used to determine the faulty line tie switch according to the completion signal of the one-side voltage loss delay of the tie switch;

The second fault recovery judging module is used to judge whether the two feeder automatic switches closest to the two ends of the fault location include a fault line tie switch;

The second fault recovery module is used to send a closing signal to the wireless public network FTU connected to the faulty line tie switch, so that the faulty line tie switch is closed.

The fault self-healing device for distribution network overhead lines in the embodiment of the present invention can implement the above-mentioned method for self-healing faults of distribution network overhead lines, and has functional modules for executing the above method and corresponding beneficial effects. The process of implementing the method by each functional module will not be repeated here. .

The embodiment of the present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned method for self-healing a distribution network overhead line fault are realized. Receive the fault information of various switches in the control area, and judge the outgoing line switch of the faulty line and the two feeder automatic switches closest to the two ends of the fault location, which can adapt to the different reclosing times of the outgoing line switch of the faulty line, and ensure the The two feeder automatic switches are opened and locked to ensure the isolation of the fault location. According to the different types of the two feeder automatic switches closest to the two ends of the fault location, different closing orders are issued to prevent the non-fault location line from being re-connected due to the wrong switching of the switch. In case of power outage, it can ensure the normal power supply of the line in the non-fault location, which can realize more reliable fault self-healing in the overhead line of the distribution network with a complex topology.

The above examples only express several implementations of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (10)

1. A fault self-healing method for distribution network overhead lines, characterized in that, comprising the steps: Receive the section switch fault information sent by the wireless public network FTU in the control area, the contact switch fault information and the outgoing line switch fault information sent by the secondary equipment of the outgoing line switch; determining the outgoing line switch of the faulty line according to the outgoing line switch fault information; Determining the two feeder automation switches closest to the two ends of the fault location according to the fault information of the section switch, the fault information of the tie switch and the fault information of the outlet switch; According to the number of times of reclosing of the outlet switch of the faulty line, the two feeder automatic switches closest to the two ends of the fault position are opened and locked, and the power supply line between the two feeder automatic switches closest to the two ends of the fault position is isolated; According to the types of the two feeder automatic switches closest to the two ends of the fault position, a closing command is issued to restore the line power supply at the non-fault position. 2. The fault self-healing method for distribution network overhead lines according to claim 1, characterized in that, receiving the segment switch fault information sent by the wireless public network FTU in the control area, the contact switch fault information and the outgoing line switch secondary equipment transmission Outgoing switch fault information of the outgoing line switch, the process of determining the faulty line outgoing line switch according to the outgoing line switch fault information includes: After receiving the outgoing switch fault information, if the section switch fault information and the tie switch fault information are received within a first set time, then determine the faulty line outgoing switch according to the outgoing switch fault information. 3. The fault self-healing method for distribution network overhead lines according to claim 2, characterized in that, according to the number of times of reclosing of the outgoing line switch of the faulty line, the two feeder automatic switches closest to the two ends of the faulty position are opened The process of latching, isolating the circuit at the fault location involves: If the number of times of reclosing is zero, then send an opening and locking command to the monitoring device connected to the two feeder automatic switches at the two ends closest to the fault position, so that the two feeder automatic switches at the two ends closest to the fault position are opened atresia. 4. The fault self-healing method for the overhead line of distribution network according to claim 2, characterized in that, according to the number of times of reclosing of the outgoing switch of the faulty line, the two feeder automatic switches closest to the two ends of the fault position are opened The process of latching, isolating the circuit at the fault location involves: If the number of reclosing is one, and the reclosing failure information of the outlet switch of the faulty line is received, the locking and opening signals of the two feeder automatic switches closest to the two ends of the fault position are not received within the second preset time , then send a locking and opening command to the monitoring device connected to the two feeder automatic switches closest to the two ends of the fault position, so that the two feeder automatic switches closest to the fault position are opened and locked. 5. The fault self-healing method for distribution network overhead lines according to claim 3 or 4, characterized in that, according to the types of the two feeder automatic switches closest to the two ends of the fault location, a closing command is issued to restore the non-fault location The process of line powering includes: If the two feeder automatic switches closest to the two ends of the fault location do not include the fault line outlet switch, then send a closing command to the secondary device of the outlet switch connected to the fault line outlet switch, so that the The outlet switch of the faulty line is closed. 6. The fault self-healing method for distribution network overhead lines according to claim 3 or 4, characterized in that, according to the types of the two feeder automatic switches closest to the two ends of the fault position, a closing command is issued to restore the non-fault position The process of line powering includes: receiving the unilateral voltage loss delay completion signal of the tie switch sent by the wireless public network FTU in the control area, and determining the faulty line tie switch according to the unilateral voltage loss delay completion signal of the tie switch; If the two feeder automatic switches closest to the two ends of the fault location do not include the fault line tie switch, then send a closing command to the wireless public network FTU connected to the fault line tie switch, so that the fault The line tie switch is closed. 7. A fault self-healing system for overhead lines in distribution networks, characterized in that it includes a distribution automation master station, feeder automation switches and monitoring devices; The feeder automatic switch includes a substation outlet switch, a section switch and a tie switch, and the monitoring device includes an outlet switch secondary device and a wireless public network FTU; the outlet switch secondary device is connected to the substation outlet switch, and each The section switch and the connection switch are connected to one of the wireless public network FTUs, the secondary equipment of the outlet switch communicates with the distribution automation master station through optical fiber, and the wireless public network FTU communicates with the wireless public network through the wireless public network. Distribution automation master station wireless communication; The distribution automation master station is used to implement the fault self-healing method for distribution network overhead lines in claims 1-6. 8. The fault self-healing system for distribution network overhead lines according to claim 7, wherein the wireless public network FTU includes a multi-mode communication module for performing multi-mode wireless public network communication with the main station. 9. A fault self-healing device for overhead lines in distribution networks, characterized in that it includes: The first receiving module is used to receive the section switch failure information sent by the wireless public network FTU in the control area, the connection switch failure information and the outlet switch failure information sent by the outlet switch secondary equipment; A fault line outgoing switch judging module, configured to determine the faulty line outgoing switch according to the fault information of the outgoing switch; The switch judging module at both ends of the fault is used to determine the two feeder automatic switches closest to the two ends of the fault location according to the fault information of the section switch, the fault information of the tie switch and the fault information of the outlet switch; The fault isolation module is used to open and lock the two feeder automatic switches closest to the two ends of the fault position according to the number of reclosing switches of the fault line outlet switch; The second receiving module is used to receive the unilateral voltage loss delay completion signal of the contact switch sent by the wireless public network FTU in the control area; The fault recovery module is configured to issue a closing command according to the types of the two feeder automatic switches closest to the two ends of the fault position, so as to restore the line power supply at the non-fault position. 10. A computer-readable storage medium, on which a computer program is stored, wherein, when the computer program is executed by a processor, the steps of the method according to any one of claims 1-6 are implemented.