Broken line fault positioning method and device, electronic equipment, storage medium and program

Abstract

The embodiment of the invention discloses a broken line fault positioning method and device, electronic equipment, a storage medium and a program, and the method comprises the steps: obtaining broken line fault monitoring associated data collected in real time in a broken line fault monitoring process of a distribution line; performing broken line fault analysis and positioning on the broken line fault in the distribution line according to the broken line fault monitoring association data, and determining the position of the broken line fault in the distribution line; wherein the broken line fault monitoring associated data comprises a switch PT secondary voltage, a switch three-phase voltage, a three-phase current, a distribution transformer voltage, a zero sequence voltage and a zero sequence current. According to the technical scheme, the position of the broken line fault in the distribution line can be accurately judged, so that the safe operation condition of the whole power grid and the personal and equipment safety are improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of fault detection, and in particular to a disconnection fault location method, device, electronic device, storage medium and program. Background Art

[0002] As people's living standards continue to improve, the number of electrical equipment continues to increase, and higher requirements are placed on power supply reliability. The operating environment of distribution lines is complex and changeable. Line disconnection (phase loss) often occurs due to external damage, obsolete equipment, extreme weather, and inadequate operation and maintenance management. There are also cases where the zero-sequence grounding protection of the switch cannot be timely and correctly operated due to high-resistance grounding of the distribution line. The traditional location of line disconnection faults in distribution lines mainly relies on manual inspections and regular maintenance.

[0003] In the process of realizing the present invention, the inventors found that the prior art has the following defects: the traditional method for locating a broken line fault in a distribution line cannot accurately locate the broken line fault position, and requires a lot of time, manpower and material resources. Summary of the invention

[0004] The embodiments of the present invention provide a disconnection fault locating method, device, electronic device, storage medium and program, which can accurately determine the disconnection fault location in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal and equipment safety.

[0005] According to one aspect of the present invention, a method for locating a line disconnection fault is provided, comprising:

[0006] Acquire disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line;

[0007] Performing line break fault analysis and positioning on the line break fault in the power distribution line according to the line break fault monitoring associated data, and determining the line break fault position in the power distribution line;

[0008] The line break fault monitoring-related data include the switch voltage transformer (PT) secondary voltage, switch three-phase voltage, three-phase current, distribution transformer voltage, zero-sequence voltage and zero-sequence current.

[0009] According to another aspect of the present invention, there is provided a line break fault location device, comprising:

[0010] A disconnection fault monitoring associated data acquisition module is used to obtain disconnection fault monitoring associated data collected in real time during the disconnection fault monitoring of the distribution line;

[0011] A line break fault location determination module, used to analyze and locate the line break fault in the power distribution line according to the line break fault monitoring associated data, and determine the line break fault location in the power distribution line;

[0012] The line break fault monitoring-related data include the switch PT secondary voltage, the switch three-phase voltage, the three-phase current, the distribution transformer voltage, the zero-sequence voltage and the zero-sequence current.

[0013] According to another aspect of the present invention, there is provided an electronic device, the electronic device comprising:

[0014] at least one processor; and

[0015] a memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the line break fault locating method described in any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the line break fault locating method described in any embodiment of the present invention when executed.

[0018] According to another aspect of the present invention, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the method for locating a line break fault according to any embodiment of the present invention is implemented.

[0019] The embodiment of the present invention obtains line break fault monitoring related data collected in real time during the line break fault monitoring of the distribution line, and further analyzes and locates the line break fault in the distribution line according to the line break fault monitoring related data, thereby determining the line break fault position in the distribution line, solving the problem that the line break fault position cannot be accurately located in the existing distribution line, and can accurately determine the line break fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a flow chart of a disconnection fault locating method provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a flow chart of a disconnection fault locating method provided in Embodiment 2 of the present invention;

[0024] Figure 3 This is a flow chart of a disconnection fault locating method provided by Embodiment 3 of the present invention;

[0025] Figure 4 This is a flow chart of a method for locating a trunk line disconnection fault provided by Embodiment 3 of the present invention;

[0026] Figure 5 This is a flow chart of a method for locating a disconnection fault according to relevant data of a branch switch provided in Embodiment 3 of the present invention;

[0027] Figure 6 is a flow chart of a disconnection fault locating method provided by Embodiment 4 of the present invention;

[0028] Figure 7 is a flowchart of a specific disconnection fault locating method provided by Embodiment 4 of the present invention;

[0029] Figure 8 This is a flow chart of a disconnection fault locating method provided by Embodiment 5 of the present invention;

[0030] Fig. 9 is a flowchart of a specific disconnection fault locating method provided by Embodiment 5 of the present invention;

[0031] Fig.10 is a schematic diagram of a disconnection fault locating device provided in Embodiment 6 of the present invention;

[0032] Fig.11 A schematic diagram of the structure of an electronic device provided in Embodiment 7 of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] Embodiment 1

[0036] Figure 1 is a flow chart of a disconnection fault location method provided in the first embodiment of the present invention. This embodiment is applicable to the case of determining the disconnection fault location in the power distribution line. The method can be executed by a disconnection fault location device. The device can be implemented by software and / or hardware and can generally be integrated in an electronic device. The electronic device can be a terminal device or a server device. Figure 1 As shown, the method includes the following operations:

[0037] S110: Obtain disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line.

[0038] Among them, the distribution line can be a power line in the power system, which is used to transmit electric energy from a power station or a substation to the user end. Exemplarily, the distribution line can include but is not limited to a medium voltage distribution line, such as a 10kV distribution line. The line break fault monitoring associated data can be data used to monitor and analyze the line break fault when a line break fault occurs in the distribution line. Exemplarily, the line break fault monitoring associated data can include but is not limited to the switch PT secondary voltage, the switch three-phase voltage, the three-phase current, the distribution transformer voltage, the zero-sequence voltage and the zero-sequence current, etc.

[0039] The line-break fault monitoring-related data may be related data used to analyze whether a line-break fault occurs in a distribution line and locate the line-break fault location. Exemplarily, the line-break fault monitoring-related data may include but are not limited to the switch PT secondary voltage, the switch three-phase voltage, the three-phase current, the distribution transformer voltage, the zero-sequence voltage and the zero-sequence current, etc.

[0040] Accordingly, it is difficult to accurately locate the disconnection fault position in the distribution line using conventional methods. In order to timely discover the disconnection fault in the distribution line, it is necessary to obtain the disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line, and further analyze and locate the disconnection fault based on the disconnection fault monitoring related data, so as to determine the disconnection fault position in the distribution line.

[0041] S120: Analyze and locate the line break fault in the power distribution line according to the line break fault monitoring associated data to determine the line break fault position in the power distribution line.

[0042] The disconnection fault location may be a location where a disconnection fault occurs in a distribution line. For example, the disconnection fault location may include, but is not limited to, a distribution transformer on a trunk line or a switch on a branch line. The embodiment of the present invention does not limit the disconnection fault location where a disconnection fault occurs.

[0043] In an embodiment of the present invention, after obtaining the line break fault monitoring associated data collected in real time during the line break fault monitoring process of the distribution line, the line break fault in the distribution line can be analyzed and located based on the line break fault monitoring associated data, and the line break fault location in the distribution line can be further determined, thereby improving the safe operating conditions of the entire power grid and the safety of personnel and equipment.

[0044] The embodiment of the present invention obtains line break fault monitoring related data collected in real time during the line break fault monitoring of the distribution line, and further analyzes and locates the line break fault in the distribution line according to the line break fault monitoring related data, thereby determining the line break fault position in the distribution line, solving the problem that the line break fault position cannot be accurately located in the existing distribution line, and can accurately determine the line break fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0045] Embodiment 2

[0046] Figure 2 is a flow chart of a disconnection fault location method provided in the second embodiment of the present invention. This embodiment is specific based on the above embodiment. In this embodiment, multiple specific optional implementation methods for analyzing and locating disconnection faults in distribution lines according to disconnection fault monitoring associated data are provided. Figure 2As shown, the method of this embodiment may include:

[0047] S210: Obtain disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line.

[0048] S220: When it is determined that there is a fault signal in the substation, the line break fault is analyzed and located according to the line break fault monitoring associated data to determine the line break fault location.

[0049] The fault signal may be a signal generated when a fault occurs in a distribution line. The fault signal may be used for fault detection and location in a distribution line. For example, the fault signal may include but is not limited to reclosing, overcurrent first-stage action, and zero-sequence action, etc. The embodiment of the present invention does not limit the specific signal type included in the fault signal.

[0050] In the embodiment of the present invention, when there is a fault signal in the substation, the line break fault can be analyzed and located according to the line break fault monitoring associated data to determine the line break fault location, thereby improving the processing speed of the line break fault.

[0051] In an optional embodiment of the present invention, analyzing and locating the line break fault according to the line break fault monitoring associated data to determine the line break fault location may include: when it is determined that there is a fault signal in the substation, determining the line location of the line break fault location in the distribution line according to the line break fault monitoring associated data; when it is determined that the line break fault location is a trunk line in the distribution line, determining the line break fault location according to the line break fault monitoring associated data and the trunk line disconnection judgment condition; when it is determined that the line break fault location is a branch line of the distribution line, determining the line break fault location according to the line break fault monitoring associated data and the branch line disconnection judgment condition.

[0052] The trunk line may be a main power line in a distribution line in a power system, which may be used to connect large power plants, large-capacity users, and adjacent sub-power grids. A branch line may be a line branched from a trunk line in a distribution line, which may be used to supply power to a specific area or user. The trunk line disconnection judgment condition may be a condition used to locate a disconnection fault position of a trunk line in a distribution line. The branch line disconnection judgment condition may be a condition used to locate a disconnection fault position of a branch line in a distribution line.

[0053] In an embodiment of the present invention, when a fault signal exists in a substation, the position of the line break fault in the distribution line can be determined. First, it can be determined whether the line break fault position is in the trunk line or the branch line of the distribution line based on the line break fault monitoring associated data. Further, in the case where it is determined that the line break fault position is in the trunk line of the distribution line, the line break fault position can be determined based on the line break fault monitoring associated data and the trunk line break judgment condition; in the case where it is determined that the line break fault position is in the branch line of the distribution line, the line break fault position can be determined based on the line break fault monitoring associated data and the branch line break judgment condition. It can be understood that when the line break fault position is in the trunk line or the branch line of the distribution line, the line break fault monitoring associated data is different.

[0054] In an embodiment of the present invention, when it is determined that there is a fault signal in the substation, the line break fault is analyzed and located according to the line break fault monitoring related data, the main line break judgment condition and the branch line break judgment condition, and the line break fault location is determined, thereby solving the problem that the line break fault location in the existing distribution line cannot be accurately located. The line break fault location in the distribution line can be accurately determined, thereby improving the safe operation conditions of the entire power grid and the safety of personnel and equipment.

[0055] Embodiment 3

[0056] Figure 3 is a flow chart of a disconnection fault location method provided in the third embodiment of the present invention. This embodiment is specific based on the above embodiment. In this embodiment, multiple specific optional implementation methods for analyzing and locating disconnection faults in distribution lines according to disconnection fault monitoring associated data are provided. Figure 3 As shown, the method of this embodiment may include:

[0057] S310: Obtain disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line.

[0058] S320: When it is determined that there is a fault signal in the substation, the line break fault is analyzed and located according to the line break fault monitoring associated data to determine the line break fault location.

[0059] S330: When it is determined that there is a fault signal in the substation, determine the line position of the line break fault location in the distribution line according to the line break fault monitoring associated data.

[0060] S340, determine whether the trunk switch is in operation, if so, execute S360, otherwise, execute S350.

[0061] S350: Determine a line break fault position of the line break fault on the branch line according to the associated detection data of the branch switch.

[0062] The associated detection data of the branch switch may be associated data that can be used to detect the location of the disconnection fault on the branch line when a disconnection fault occurs in the distribution line. Exemplarily, the associated detection data of the branch switch may include but are not limited to the PT voltage, switch current, switch current imbalance, and switch current imbalance mutation amount on the branch switch side.

[0063] Among them, the switch current imbalance can be the situation where the three-phase current is inconsistent and changes with the load trend without the influence of external forces such as operation or defects. The calculation formula of the switch current imbalance is as follows:

[0064]

[0065] Among them, α X is the switch current imbalance, I a ,I b ,I c are the three-phase currents of the switch, I avg is the average value of the three-phase current of the switch.

[0066] The sudden change in the switching current unbalance can be a situation where the three-phase current unbalance is suddenly expanded or reduced after being affected by external interference. The calculation formula for the sudden change in the switching current unbalance is as follows:

[0067] β X =|α X -α' X |

[0068] Among them, β X is the sudden change of the unbalance degree of the switching current, α X is the current imbalance of the switch at the current moment, α' X is the unbalance degree of the switching current at the previous moment.

[0069] S360, determine whether the trunk switch meets the first switch condition, if so, execute S370, otherwise, execute S390.

[0070] S370: Determine the disconnection fault position as an initial predicted position between the trunk switch and an upper-level switch of the trunk switch on the trunk line.

[0071] Among them, the trunk switch action can be the operation of closing and opening the trunk line switch in the distribution line, and whether there is a line break fault in the distribution line can be determined based on whether the trunk switch is in action. The first switch condition can be a judgment condition set according to relevant data of the trunk switch, which can be used to assist in determining the position of the line break fault. Optionally, the first switch condition can be configured based on the data of the trunk switch changes when a line break fault occurs in the trunk line of the distribution line. Exemplarily, the first switch condition can include that any phase of the secondary voltage of the trunk switch PT exceeds the first threshold and any phase current of the three-phase current is zero. The initial pre-judgment position can be the initial range of the line break fault position in the distribution line when it is determined that there is a trunk switch action and the trunk switch meets the first switch condition.

[0072] Accordingly, if it is determined that the trunk switch is in action, the disconnection fault position can be preliminarily determined according to the first switch condition. Further, when it is determined that the trunk switch is in action and the trunk switch meets the first switch condition, the disconnection fault position is located at a certain initial prejudgment position between the trunk switch and the upper switch of the trunk switch on the trunk line.

[0073] S380: Determine the disconnection fault position according to abnormal voltage data between the trunk switch and an upper-level switch of the trunk switch and the initial predicted position.

[0074] The abnormal voltage data may be voltage change data caused by a disconnection fault in a power distribution line. For example, the abnormal voltage data may include, but is not limited to, voltage deviation, voltage instability, and overvoltage, etc. The embodiment of the present invention does not limit the specific situation of the abnormal voltage data.

[0075] In an embodiment of the present invention, after determining that the line break fault position is the initial predicted position between the trunk switch on the trunk line and the upper-level switch of the trunk switch, the specific line break fault position between the trunk switch on the trunk line and the upper-level switch of the trunk switch can be accurately determined based on the abnormal voltage data between the trunk switch and the upper-level switch of the trunk switch combined with the initial predicted position of the preliminary prediction.

[0076] In a specific example, Figure 4 1 is a flow chart of a method for locating a trunk line disconnection fault provided by the third embodiment of the present invention. Figure 4As shown, when there is a fault signal in the distribution line, first, it can be detected whether the position where the fault signal exists is a regular open-loop point. If it is not a regular open-loop point, it indicates that the power supply adopts an abnormal power supply mode (transfer power supply), then it is necessary to detect which switch the actual open-loop point is at, and further merge the line from the actual open-loop point to the connecting switch section into the power supply line, and execute the above-mentioned disconnection fault position judgment process; if it is a regular open-loop point, directly execute the above-mentioned disconnection fault position judgment process. If it is determined that the switch in the station or the trunk line is in action, and the voltage of any phase of the switch PT secondary voltage exceeds 70V and the current of any phase of the switch current is zero, then the disconnection fault position can be determined as the initial prejudgment position between the trunk switch on the trunk line and the upper switch of the trunk switch. In the case of determining that the disconnection fault position is the initial prejudgment position between the trunk switch on the trunk line and the upper switch of the trunk switch, the position of the first distribution transformer with voltage abnormality along the flow direction can be determined as the disconnection fault position. If it is determined that the disconnection fault position is not at the initial pre-judged position between the trunk switch on the trunk line and the upper switch of the trunk switch, the judgment of the disconnection fault position in the distribution line in this case can be terminated. The distribution transformer may include but is not limited to a public distribution transformer and a dedicated distribution transformer.

[0077] In a specific example, taking a 10kV distribution line as an example, if any phase on the low-voltage side of the public distribution transformer has a voltage lower than 70% of the normal voltage, and the current of the phase is greater than 0, it can be determined that the high-voltage side of the public distribution transformer is disconnected. When any phase of phase A and phase C of the dedicated distribution transformer is disconnected, only one of the phases A and C has a line voltage of 100V, and the other phase voltage is 0; when phase B is disconnected, phase A and phase C each display 1 / 2 voltage. Therefore, if the voltage drops below 70V, it can be determined that phase B of the dedicated distribution transformer is disconnected.

[0078] S390, determine whether the trunk switch meets the second switch condition, if so, execute S3100, otherwise, end the determination of the disconnection fault location in this case.

[0079] Among them, the second switch condition can be a judgment condition set according to the relevant data of the trunk switch, which can be used to assist in determining the location of the disconnection fault. Optionally, the second switch condition can be configured according to the data of the trunk switch change when a branch line in the distribution line has a disconnection fault. Exemplarily, the second switch condition may include but is not limited to that the secondary voltage of the trunk switch PT does not exceed the first threshold and / or the three-phase current is not zero, and the trunk switch current imbalance exceeds the second threshold and / or the trunk switch current imbalance mutation exceeds the third threshold.

[0080] Among them, the first threshold value can be the secondary voltage value of the trunk switch PT when the distribution line is working normally. For example, the first threshold value can be 70V. The second threshold value can be the current imbalance value of the trunk switch when the distribution line is working normally. For example, the second threshold value can be 25%. The third threshold value can be the sudden change value of the current imbalance of the trunk switch when the distribution line is working normally. For example, the third threshold value can be 10%. It should be noted that the secondary voltage value of the trunk switch PT, the trunk switch current imbalance and the sudden change value of the trunk switch current imbalance when the distribution lines in different regions are working normally are different, that is, the specific values ​​of the first threshold value, the second threshold value and the third threshold value can be determined according to the specific working conditions of the distribution line, and the embodiment of the present invention does not limit the specific values ​​of the first threshold value, the second threshold value and the third threshold value.

[0081] In the embodiment of the present invention, when determining the disconnection fault location according to the disconnection fault monitoring associated data and the branch line disconnection judgment condition, if it is determined that there is a trunk switch action and the trunk switch meets the second switch condition, it can be determined that the disconnection fault location is located in the branch line. It can be understood that if the trunk switch does not meet the second switch condition, it means that the trunk switch meets the first switch condition.

[0082] In a specific example, when it is determined that the main switch is actuated and the secondary voltage of the main switch PT does not exceed 70V and / or the three-phase current is not zero, when the main switch satisfies the conditions that the main switch current imbalance exceeds 25% and / or the main switch current imbalance mutation exceeds 10%, it can be determined that the line break fault location of the line break fault is located in the branch line.

[0083] S3100, determine whether the branch switch is an automatic branch switch and whether the automatic branch switch is in operation, if so, execute S350, otherwise, execute S3110.

[0084] In the embodiment of the present invention, when it is determined that the disconnection fault position is located in the branch line, it can be determined whether the branch switch is an automated branch switch and whether the automated branch switch is in action. Further, when it is determined that the branch switch is an automated branch switch and the automated branch switch is in action, the disconnection fault position of the disconnection fault on the branch line can be determined based on the associated detection data of the branch switch; when it is determined that the branch switch is an automated branch switch but the automated branch switch is not in action, the determination of the disconnection fault position in this case can be terminated.

[0085] S3110. Determine the line break fault location of the branch line according to the abnormal data of the distribution transformer voltage in the branch switch power flow direction.

[0086] In the embodiment of the present invention, if it is determined that the branch switch is not an automated branch switch, the line break fault position in the branch line can be determined based on abnormal data of the distribution transformer voltage in the power flow direction of the branch switch.

[0087] In a specific example, Figure 5 1 is a flow chart of a method for locating a disconnection fault according to relevant data of a branch switch provided in Embodiment 3 of the present invention. Figure 5 As shown, it can be determined whether the branch switch is an automated branch switch first. If it is determined that the branch switch is not an automated branch switch, it can be detected whether there is a distribution transformer with abnormal voltage along the power flow direction. If there is a distribution transformer with abnormal voltage along the power flow direction, it can be determined that the position of the T-connection point of the main line from the distribution transformer with the first abnormal voltage along the power flow direction is the disconnection fault position; if there is no distribution transformer with abnormal voltage along the power flow direction, the determination of the disconnection fault position in this case can be terminated.

[0088] When it is determined that the switch is an automated branch switch, it can be determined whether the automated branch switch is in operation. When it is determined that the automated switch is not in operation, the determination of the disconnection fault position in this case can be terminated. When it is determined that the automated branch switch is in operation, on the one hand, the PT voltage and switch current on the switch side can be detected. If any phase of the PT voltage on the switch side drops below 70% of the normal value, and the current of any phase of the switch is zero, it can be determined that the disconnection fault position in the branch line is between the T contact of the main line and the branch switch; if the PT voltage on the switch side is normal, and the current of any phase of the switch is zero, it can be determined that the disconnection fault position in the branch line is between the load side of the switch and the first power supply point of the branch line.

[0089] On the other hand, Figure 5 As shown, it is possible to detect whether the switch current imbalance exceeds 25% and / or whether the switch current imbalance mutation exceeds 10%. If any one of the above items exceeds the above threshold, it is possible to further detect whether there is a distribution transformer with abnormal voltage along the flow direction. If there is a distribution transformer with abnormal voltage, it is possible to determine the line break fault position in the branch line from the distribution transformer that first has voltage abnormality along the flow direction to the switch load side. If the switch current imbalance and the switch current imbalance mutation do not exceed the above threshold, the judgment of the line break fault position in this case can be terminated.

[0090] The embodiment of the present invention obtains line break fault monitoring related data collected in real time during line break fault monitoring of the distribution line, and further determines the line position of the line break fault in the main line or branch line of the distribution line according to the line break fault monitoring related data, thereby solving the problem that the line break fault position cannot be accurately located in the existing distribution line, and can accurately determine the line break fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0091] Embodiment 4

[0092] Figure 6 4 is a flowchart of a method for locating a line fault provided by the fourth embodiment of the present invention. This embodiment is specific based on the above embodiment. In this embodiment, multiple specific optional implementation methods for analyzing and locating line faults in distribution lines based on the offline data of the electric energy metering of the distribution transformer are provided. Figure 6 As shown, the method of this embodiment may include:

[0093] S410: Obtain disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line.

[0094] S420: When it is determined that there is a fault signal in the substation, the line break fault is analyzed and located according to the line break fault monitoring associated data to determine the line break fault location.

[0095] S430: Obtain offline data of electric energy metering of the distribution transformer.

[0096] The offline data of the electric energy metering of the distribution transformer may be the offline status data of the electric energy metering of the distribution transformer.

[0097] Figure 7 FIG. 4 is a flowchart of a specific disconnection fault location method provided by Embodiment 4 of the present invention. Figure 7 As shown, when there is a fault signal in the substation, the offline data of the electric energy metering of the distribution transformer can be obtained, and an offline list can be generated to determine whether the electric energy metering of the distribution transformer is in an offline state.

[0098] S440, determine whether the electric energy metering of the distribution transformer is online, if so, execute S480, otherwise, execute S450.

[0099] S450, obtaining AC power meter signal-related data, wherein the AC power meter signal-related data includes a three-phase AC power meter signal and a low-voltage AC power meter signal.

[0100] The AC energy meter signal associated data may be AC ​​energy meter associated data that can be used to detect the location of a disconnection fault when a disconnection fault occurs in a distribution line. Exemplarily, the AC energy meter signal associated data may include a three-phase AC energy meter signal and a low-voltage AC energy meter signal.

[0101] In an embodiment of the present invention, after obtaining the offline data of the electric energy metering of the distribution transformer, it can be determined whether the electric energy metering of the distribution transformer is in an offline state according to the offline data of the electric energy metering of the distribution transformer. Further, when it is determined that the electric energy metering of the distribution transformer is in an offline state, the AC electric energy meter signal associated data can be obtained, so as to determine the disconnection fault location according to the AC electric energy meter signal associated data.

[0102] S460, determine whether the target number of three-phase AC energy meter signals are simultaneously missing a phase and the low-voltage AC energy meter signals are stable. If so, execute S470; otherwise, end the determination of the disconnection fault location in this case.

[0103] The target number may be the number of three-phase AC energy meters whose signals are offline, which can be used to determine whether there is a disconnection fault in the power distribution line. For example, the target number may be at least three.

[0104] S470: Determine that the line break fault location is the high voltage side of the distribution transformer.

[0105] In an embodiment of the present invention, after obtaining the AC power meter signal associated data, it can be determined whether there are a target number of three-phase AC power meter signals that are simultaneously out of phase and the low-voltage AC power meter signals are stable, that is, there is no large-scale disconnection. Further, if it is determined that there are a target number of three-phase AC power meter signals that are simultaneously out of phase and the low-voltage AC power meter signals are stable, it can be determined that the disconnection fault location is the high-voltage side of the distribution transformer. If it is determined that there are no target number of three-phase AC power meter signals that are simultaneously out of phase or it is determined that the low-voltage AC power meter signals are unstable, the judgment of the disconnection fault location in this case can be terminated.

[0106] S480: Obtain voltage data of a distribution transformer in the distribution line.

[0107] The distribution transformer voltage data may be voltage-related parameters of the distribution transformer during operation. For example, the distribution transformer voltage data may include, but is not limited to, the high-voltage side voltage and the low-voltage side voltage of the distribution transformer. The embodiment of the present invention does not limit the specific parameter types included in the distribution transformer voltage data.

[0108] In an embodiment of the present invention, after obtaining the offline data of the electric energy metering of the distribution transformer, it can be determined whether the electric energy metering of the distribution transformer is in an offline state according to the offline data of the electric energy metering of the distribution transformer. Further, when the electric energy metering of the distribution transformer is in an online state, the voltage data of the distribution transformer in the distribution line can be obtained, so as to determine the disconnection fault location according to the voltage data of the distribution transformer.

[0109] S490, determine whether there is an abnormality in the voltage data of the distribution transformer. If so, execute S4100; otherwise, end the determination of the disconnection fault location in this case.

[0110] S4100. Determine that the line break fault location is the high voltage side of the distribution transformer.

[0111] In an embodiment of the present invention, after obtaining the voltage data of the distribution transformer in the distribution line, it can be determined whether there is an abnormality in the voltage data of the distribution transformer. Further, if it is determined that there is an abnormality in the voltage data of the distribution transformer, it can be determined that the line break fault location is the high voltage side of the distribution transformer. If it is determined that there is no abnormality in the voltage data of the distribution transformer, the determination of the line break fault location in this case can be terminated.

[0112] It should be noted that in order to ensure the normal operation of the distribution line, when the fault signal in the substation is empty, the offline data of the power metering of the distribution transformer can be periodically obtained to generate an offline list to determine whether the power metering of the distribution transformer is in an offline state, and judge whether there is a break in the distribution line according to the above scheme. For example, the offline data of the power metering of the distribution transformer can be obtained every 15 minutes.

[0113] In an optional embodiment of the present invention, analyzing and locating the line break fault according to the line break fault monitoring associated data to determine the line break fault location may also include: when it is determined that the fault signal in the substation is empty, determining the line break fault location according to the line break fault monitoring associated data, the main line break judgment condition and the branch line break judgment condition.

[0114] In an embodiment of the present invention, when it is determined that the distribution line fault signal is empty, the line break fault monitoring associated data can also be periodically obtained. Furthermore, based on the line break fault monitoring associated data, the main line break judgment condition and the branch line break judgment condition, it can be determined whether there is a line break fault in the distribution line and the line break fault location.

[0115] It is understandable that even when the fault signal in the substation is empty, there may be a disconnection fault in the distribution line. Therefore, the location of the disconnection fault can be determined by periodically executing the above judgment process when there is a fault signal in the substation. Figure 4 As shown, when it is determined that there is a trunk switch action and the trunk switch satisfies the first switch condition, the line break fault position can be determined as the initial predicted position between the trunk switch and the upper-level switch of the trunk switch on the trunk line; wherein the first switch condition includes that any phase of the trunk switch PT secondary voltage exceeds the first threshold value and any phase current of the three-phase current is zero; the line break fault position is determined based on the abnormal voltage data between the trunk switch and the upper-level switch of the trunk switch and the initial predicted position; when it is determined that there is no trunk switch action, the line break fault position of the branch line is determined based on the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance and switch current imbalance mutation amount on the branch switch side. It is also possible to determine that the line break fault location is located in the branch line when it is determined that the main switch is in action and the main switch satisfies the second switch condition; wherein the second switch condition includes that the secondary voltage of the main switch PT does not exceed the first threshold value and / or the three-phase current is not zero, and the main switch current imbalance exceeds the second threshold value and / or the main switch current imbalance mutation exceeds the third threshold value; when it is determined that the branch switch is an automatic branch switch and the automatic branch switch is in action, determine the line break fault location on the branch line according to the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance and switch current imbalance mutation on the branch switch side; when it is determined that the branch switch is not an automatic branch switch, determine the line break fault location in the branch line according to the abnormal data of the distribution transformer voltage in the flow direction of the branch switch.

[0116] It should be noted that, when it is determined that the fault signal in the substation is empty, the periodic acquisition of the offline data and the disconnection fault monitoring-related data of the power metering of the distribution transformer is carried out simultaneously.

[0117] The embodiment of the present invention obtains the offline data of the electric energy metering of the distribution transformer, thereby determining whether the electric energy metering of the distribution transformer is offline. Furthermore, according to the AC electric energy meter signal correlation data or the distribution transformer voltage data in the distribution line, the disconnection fault position can be determined, solving the problem that the disconnection fault position cannot be accurately located in the existing distribution line, and can accurately determine the disconnection fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0118] Embodiment 5

[0119] Figure 8is a flow chart of a disconnection fault location method provided by Embodiment 5 of the present invention. This embodiment is specific based on the above embodiment. In this embodiment, multiple specific optional implementation methods for analyzing and locating disconnection faults in distribution lines based on disconnection fault monitoring associated data are provided. Figure 8 As shown, the method of this embodiment may include:

[0120] S510: Obtain disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line.

[0121] S520: When it is determined that the voltage in the substation has both upper and lower limit signals and the duration of the upper and lower limit signals exceeds a first time threshold, determine the line position of the line break fault in the distribution line according to the line break fault monitoring associated data.

[0122] Among them, the upper and lower limit signals may be over-limit alarm signals in the substation monitoring system, which may be used to indicate whether a line break fault has occurred in the distribution line and to locate the line break fault position. Exemplarily, the upper and lower limit signals may include but are not limited to voltage over-limit, etc., and the embodiments of the present invention do not limit the specific parameter types included in the upper and lower limit signals. The first time threshold may be the maximum time that the voltage over-limit signal can last when the distribution line is operating normally. Exemplarily, the first time threshold may be 5 seconds. It is understandable that the specific value of the first time threshold may be determined according to the specific working conditions of the distribution line, and the embodiments of the present invention do not limit the specific value of the first time threshold.

[0123] In an embodiment of the present invention, a high-resistance grounding fault in a distribution line may cause the zero-sequence grounding protection of the switch to fail to operate in a timely and correct manner. Therefore, it is necessary to determine the location of the line break fault in the distribution line according to the line break fault monitoring associated data when it is determined that the voltage in the substation has both upper and lower limit signals and the duration of the voltage exceeding the upper and lower limit signals exceeds the first time threshold, so as to improve the operating safety of the distribution line.

[0124] S530: Acquire grounding alarm signal data of the distribution line automation switch.

[0125] The grounding alarm signal data may be alarm information generated by an automatic switch when a disconnection fault occurs in a distribution line. For example, the grounding alarm signal data may include but is not limited to the zero-sequence current 3I0 of the automatic switch, and the embodiment of the present invention does not limit the specific content of the grounding alarm signal data.

[0126] S540, determine whether there is a grounding alarm signal on the distribution line automation switch, if so, execute S550, otherwise, execute S560.

[0127] S550: Determine that the line break fault location is the rear section line of the lowest level automatic switch where a grounding alarm signal appears.

[0128] Specifically, when it is determined that the line break fault type is a line break fault, the grounding alarm signal data of the distribution line automation switch can be obtained, and further, it can be determined whether there is a grounding alarm signal based on the grounding alarm signal data of the distribution line automation switch. Therefore, when it is determined that there is a grounding alarm signal based on the grounding alarm signal data of the distribution line automation switch, the line break fault location can be determined to be the rear section of the automation switch at the lowest level where the grounding alarm signal appears.

[0129] In a specific example, Fig. 9 FIG. 5 is a flowchart of a specific disconnection fault location method provided by Embodiment 5 of the present invention. Fig. 9 As shown, if it is determined based on the grounding alarm signal data that the zero-sequence current 3I0 is not less than 30A, it can be determined that the line break fault location is the rear section of the automatic switch at the lowest level where the grounding alarm signal appears.

[0130] S560, obtaining the zero-sequence voltage of the distribution line automation switch. Determine whether the zero-sequence voltage of the distribution line automation switch exceeds a first zero-sequence voltage threshold, if so, execute S590, otherwise, execute S570.

[0131] The first zero-sequence voltage threshold may be a zero-sequence voltage value of the automatic switch when the distribution line is operating normally and there is no disconnection fault. For example, the first zero-sequence voltage threshold may be 10V.

[0132] S570: Determine the line break fault location according to the line break fault monitoring associated data, the trunk line break judgment condition and the branch line break judgment condition.

[0133] In an embodiment of the present invention, if it is determined that the zero-sequence voltage of the distribution line automation switch is lower than the first zero-sequence voltage threshold, there may be a high-resistance grounding disconnection fault in the distribution line and the disconnection fault location is far away. Further, it is possible to determine whether there is a disconnection in the distribution line based on the disconnection fault monitoring associated data, the trunk line disconnection judgment condition and the branch line disconnection judgment condition, and if it is determined that there is a disconnection in the distribution line, the disconnection fault location is judged.

[0134] S580, determine the automatic switch with the maximum zero-sequence voltage in the distribution line, obtain the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line, and determine whether the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line has a lower limit crossing signal. If so, execute S590; otherwise, execute S5100.

[0135] The lower limit crossing signal may be an alarm signal issued when the PT signal of the automatic switch in the distribution line drops below a set safety threshold.

[0136] In an embodiment of the present invention, when it is determined that the grounding alarm signal is empty according to the grounding alarm signal data of the distribution line automation switch, the zero-sequence voltage of the distribution line automation switch can be obtained. Further, when it is determined that the zero-sequence voltage of the distribution line automation switch exceeds the first zero-sequence voltage threshold, the automation switch with the maximum zero-sequence voltage in the distribution line can be determined, so that the disconnection fault position in the distribution line can be determined according to the PT signal of the automation switch with the maximum zero-sequence voltage. It can be understood that when the zero-sequence voltage does not exceed the first zero-sequence voltage threshold, the distribution line operates normally without a disconnection fault.

[0137] S590: Determine that the line break fault location is the front section of the automatic switch with the maximum zero-sequence voltage in the distribution line.

[0138] In an embodiment of the present invention, when it is determined that the zero-sequence voltage of the distribution line automation switch exceeds the first zero-sequence voltage threshold, the PT signal of the automation switch with the maximum zero-sequence voltage in the distribution line is obtained. Further, when it is determined that the PT signal of the automation switch with the maximum zero-sequence voltage in the distribution line has a lower limit crossing signal, the line break fault position can be determined to be the front section of the automation switch with the maximum zero-sequence voltage in the distribution line.

[0139] S5100. Determine that the line break fault location is the rear section of the automatic switch with the maximum zero-sequence voltage in the distribution line.

[0140] In an embodiment of the present invention, when it is determined that there is no PT signal crossing the lower limit signal of the automatic switch with the maximum zero-sequence voltage in the distribution line, the line break fault location can be determined to be the rear section of the automatic switch with the maximum zero-sequence voltage in the distribution line.

[0141] The embodiment of the present invention obtains the grounding alarm signal data and the zero-sequence voltage of the distribution line automation switch, and further performs a line break fault analysis and positioning on the line break fault in the distribution line according to the grounding alarm signal data and the zero-sequence voltage, thereby determining the line break fault position in the distribution line, solving the problem that the line break fault position cannot be accurately positioned in the existing distribution line, and can accurately determine the line break fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0142] Embodiment 6

[0143] Fig.10 is a schematic diagram of a disconnection fault locating device provided in Embodiment 6 of the present invention, such as Fig.10As shown, the device includes: a disconnection fault monitoring associated data acquisition module 610, and a disconnection fault location determination module 620, wherein:

[0144] The disconnection fault monitoring associated data acquisition module 610 is used to acquire disconnection fault monitoring associated data collected in real time during the disconnection fault monitoring of the distribution line.

[0145] The line break fault location determination module 620 is used to analyze and locate the line break fault in the distribution line according to the line break fault monitoring associated data, and determine the line break fault location in the distribution line.

[0146] The line break fault monitoring-related data include the switch PT secondary voltage, the switch three-phase voltage, the three-phase current, the distribution transformer voltage, the zero-sequence voltage and the zero-sequence current.

[0147] The embodiment of the present invention obtains line break fault monitoring related data collected in real time during the line break fault monitoring of the distribution line, and further analyzes and locates the line break fault in the distribution line according to the line break fault monitoring related data, thereby determining the line break fault position in the distribution line, solving the problem that the line break fault position cannot be accurately located in the existing distribution line, and can accurately determine the line break fault position in the distribution line, thereby improving the safe operation condition of the entire power grid and the personal equipment safety.

[0148] In an optional embodiment of the present invention, the line break fault location determination module 620 may also be used to: when it is determined that there is a fault signal in the substation, analyze and locate the line break fault according to the line break fault monitoring associated data to determine the line break fault location.

[0149] In an optional embodiment of the present invention, the line break fault location determination module 620 can also be used for: when it is determined that there is a fault signal in the substation, determining the line position of the line break fault location in the distribution line according to the line break fault monitoring associated data; when it is determined that the line break fault location is a trunk line in the distribution line, determining the line break fault location according to the line break fault monitoring associated data and the trunk line break judgment condition; when it is determined that the line break fault location is a branch line of the distribution line, determining the line break fault location according to the line break fault monitoring associated data and the branch line break judgment condition.

[0150] In an optional embodiment of the present invention, the line break fault position determination module 620 can also be used for: when it is determined that there is a trunk switch action and the trunk switch satisfies a first switch condition, determining the line break fault position as an initial predicted position between the trunk switch and the upper-level switch of the trunk switch on the trunk line; wherein the first switch condition includes that any phase of the trunk switch PT secondary voltage exceeds a first threshold value and any phase current of the three-phase current is zero; determining the line break fault position according to abnormal voltage data between the trunk switch and the upper-level switch of the trunk switch and the initial predicted position; when it is determined that there is no trunk switch action, determining the line break fault position of the branch line according to the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance and switch current imbalance mutation amount on the branch switch side.

[0151] In an optional embodiment of the present invention, the line break fault location determination module 620 can also be used for: determining that the line break fault location is located in the branch line when it is determined that the trunk switch is in action and the trunk switch satisfies the second switch condition; wherein the second switch condition includes that the secondary voltage of the trunk switch PT does not exceed the first threshold value and / or the three-phase current is not zero, and the trunk switch current imbalance exceeds the second threshold value and / or the trunk switch current imbalance mutation exceeds the third threshold value; when it is determined that the branch switch is an automatic branch switch and the automatic branch switch is in action, determining the line break fault location of the line break fault on the branch line according to the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance and switch current imbalance mutation on the branch switch side; when it is determined that the branch switch is not an automatic branch switch, determining the line break fault location of the line break fault in the branch line according to the abnormal data of the distribution transformer voltage in the flow direction of the branch switch.

[0152] In an optional embodiment of the present invention, the disconnection fault location determination module 620 can also be used to: obtain offline data of the energy metering of the distribution transformer; when it is determined that the energy metering of the distribution transformer is in an offline state according to the offline data of the energy metering of the distribution transformer, obtain AC energy meter signal related data; wherein the AC energy meter signal related data includes three-phase AC energy meter signals and low-voltage AC energy meter signals; when it is determined that the target number of three-phase AC energy meter signals are simultaneously missing phases and the low-voltage AC energy meter signals are stable, determine that the disconnection fault location is the high-voltage side of the distribution transformer; when it is determined that the energy metering of the distribution transformer is in an online state according to the offline data of the energy metering of the distribution transformer, obtain the distribution transformer voltage data in the distribution line; when it is determined that there is an abnormality in the voltage data of the distribution transformer, determine that the disconnection fault location is the high-voltage side of the distribution transformer.

[0153] In an optional embodiment of the present invention, the line break fault location determination module 620 can also be used to: when it is determined that the fault signal in the substation is empty, determine the line break fault location according to the line break fault monitoring associated data, the main line break judgment condition and the branch line break judgment condition.

[0154] In an optional embodiment of the present invention, the line break fault location determination module 620 can also be used for: when it is determined that the voltage in the substation has both upper and lower limit signals and the duration of the upper and lower limit signals exceeds a first time threshold, determining the line position of the line break fault location in the distribution line according to the line break fault monitoring associated data; obtaining the grounding alarm signal data of the distribution line automation switch; when it is determined that the grounding alarm signal exists according to the grounding alarm signal data of the distribution line automation switch, determining that the line break fault location is the rear section of the automation switch at the lowest level where the grounding alarm signal appears; when it is determined that the grounding alarm signal is empty according to the grounding alarm signal data of the distribution line automation switch, obtaining the zero-sequence voltage of the distribution line automation switch; when it is determined that the zero-sequence voltage of the distribution line automation switch exceeds a first zero-sequence voltage In the case of a voltage threshold, determine the automatic switch with the maximum zero-sequence voltage in the distribution line; obtain the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line; when it is determined that the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line has a lower limit signal, determine that the line break fault position is the front section of the automatic switch with the maximum zero-sequence voltage in the distribution line; when it is determined that the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line has an empty lower limit signal, determine that the line break fault position is the rear section of the automatic switch with the maximum zero-sequence voltage in the distribution line; when it is determined that the zero-sequence voltage of the automatic switch of the distribution line is lower than the first zero-sequence voltage threshold, determine the line break fault position according to the line break fault monitoring associated data, the trunk line break judgment condition and the branch line break judgment condition.

[0155] The above-mentioned disconnection fault location device can execute the disconnection fault location method provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the disconnection fault location method provided by any embodiment of the present invention.

[0156] Since the above-mentioned disconnection fault location device is a device that can execute the disconnection fault location method in the embodiment of the present invention, based on the disconnection fault location method introduced in the embodiment of the present invention, the technicians in this field can understand the specific implementation of the disconnection fault location device of this embodiment and its various variations, so how the disconnection fault location device implements the disconnection fault location method in the embodiment of the present invention is not described in detail here. As long as the technicians in this field implement the device used by the disconnection fault location method in the embodiment of the present invention, it belongs to the scope of protection of this application.

[0157] Embodiment 7

[0158] Fig.11A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0159] like Fig.11 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0160] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0161] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a line fault location method.

[0162] In some embodiments, the line disconnection fault location method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the line disconnection fault location method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the line disconnection fault location method in any other appropriate manner (e.g., by means of firmware).

[0163] Optionally, the line break fault locating method may include: obtaining line break fault monitoring related data collected in real time during the line break fault monitoring process of the distribution line; performing line break fault analysis and locating the line break fault in the distribution line according to the line break fault monitoring related data, and determining the line break fault position in the distribution line; wherein the line break fault monitoring related data includes the switch PT secondary voltage, the switch three-phase voltage, the three-phase current, the distribution transformer voltage, the zero-sequence voltage and the zero-sequence current.

[0164] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0165] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0166] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0167] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0168] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0169] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0170] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0171] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for locating a line break fault, characterized in that: include: Acquire disconnection fault monitoring related data collected in real time during the disconnection fault monitoring of the distribution line; Performing line break fault analysis and positioning on the line break fault in the power distribution line according to the line break fault monitoring associated data, and determining the line break fault position in the power distribution line; Among them, the line break fault monitoring related data includes the secondary voltage of the switch voltage transformer PT, the switch three-phase voltage, three-phase current, distribution transformer voltage, zero-sequence voltage and zero-sequence current.

2. The method according to claim 1, characterized in that The performing a line break fault analysis and positioning on the line break fault in the power distribution line according to the line break fault monitoring associated data to determine the line break fault position in the power distribution line includes: When it is determined that there is a fault signal in the substation, the line break fault is analyzed and located according to the line break fault monitoring associated data to determine the line break fault location.

3. The method according to claim 2, characterized in that The analyzing and locating the line disconnection fault according to the line disconnection fault monitoring associated data to determine the line disconnection fault location includes: In the case where it is determined that there is a fault signal in the substation, determining the line position of the line fault location in the distribution line according to the line fault monitoring associated data; In the case where the line break fault location is determined to be a trunk line in the power distribution line, the line break fault location is determined according to the line break fault monitoring associated data and the trunk line break judgment condition; In the case where the line break fault location is determined to be in a branch line of the power distribution line, the line break fault location is determined based on the line break fault monitoring associated data and a branch line break judgment condition.

4. The method according to claim 3, characterized in that The determining the disconnection fault location according to the disconnection fault monitoring associated data and the trunk line disconnection judgment condition includes: When it is determined that the trunk switch is in action and the trunk switch meets the first switch condition, the line break fault position is determined to be the initial pre-judgment position between the trunk switch and the upper switch of the trunk switch on the trunk line; wherein the first switch condition includes that any phase of the secondary voltage of the trunk switch PT exceeds the first threshold value and any phase current of the three-phase current is zero; Determine the disconnection fault position according to abnormal voltage data between the trunk switch and the upper switch of the trunk switch and the initial predicted position; When it is determined that there is no main switch action, the line break fault position on the branch line is determined according to the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance and switch current imbalance mutation amount on the branch switch side.

5. The method according to claim 3, characterized in that: The determining the disconnection fault location according to the disconnection fault monitoring associated data and the branch line disconnection judgment condition includes: When it is determined that the trunk switch is in action and the trunk switch satisfies the second switch condition, it is determined that the line break fault location is located in the branch line; wherein the second switch condition includes that the secondary voltage of the trunk switch PT does not exceed the first threshold value and / or the three-phase current is not zero, and the trunk switch current unbalance exceeds the second threshold value and / or the trunk switch current unbalance mutation exceeds the third threshold value; When it is determined that the branch switch is an automated branch switch and the automated branch switch is in action, the disconnection fault position of the disconnection fault on the branch line is determined according to the associated detection data of the branch switch; wherein the associated detection data of the branch switch includes the PT voltage, the switch current, the switch current unbalance and the switch current unbalance mutation amount at the branch switch side; When it is determined that the branch switch is not an automated branch switch, the line break fault position of the line break fault in the branch line is determined according to abnormal data of the distribution transformer voltage in the power flow direction of the branch switch.

6. The method according to claim 2, characterized in that The analyzing and locating the line disconnection fault according to the line disconnection fault monitoring associated data to determine the line disconnection fault location includes: Obtain offline data of power metering of distribution transformers; When it is determined that the electric energy metering of the distribution transformer is in an offline state according to the offline data of the electric energy metering of the distribution transformer, the AC electric energy meter signal associated data is acquired; wherein the AC electric energy meter signal associated data includes a three-phase AC electric energy meter signal and a low-voltage AC electric energy meter signal; When it is determined that the target number of three-phase AC energy meter signals are simultaneously missing phases and the low-voltage AC energy meter signals are stable, determining that the line break fault location is the high-voltage side of the distribution transformer; When it is determined that the electric energy metering of the distribution transformer is in an online state according to the offline data of the electric energy metering of the distribution transformer, obtaining the voltage data of the distribution transformer in the distribution line; When it is determined that the voltage data of the distribution transformer is abnormal, determining that the line break fault location is the high voltage side of the distribution transformer; The analyzing and locating the line disconnection fault according to the line disconnection fault monitoring associated data to determine the line disconnection fault position also includes: When it is determined that the fault signal in the substation is empty, the line break fault location is determined according to the line break fault monitoring associated data, the trunk line break judgment condition and the branch line break judgment condition.

7. The method according to claim 1, characterized in that The performing a line break fault analysis and locating of the line break fault in the power distribution line according to the line break fault monitoring associated data to determine the line break fault position in the power distribution line further includes: When it is determined that the voltage in the substation has both upper and lower limit signals and the duration of the upper and lower limit signals exceeds a first time threshold, determining the line position of the line break fault location in the distribution line according to the line break fault monitoring associated data; Acquiring grounding alarm signal data of the distribution line automation switch; In the case where it is determined that the grounding alarm signal exists according to the grounding alarm signal data of the distribution line automation switch, the line break fault location is determined to be the rear section line of the lowest level automation switch where the grounding alarm signal appears; When it is determined that the ground alarm signal is empty according to the ground alarm signal data of the distribution line automation switch, obtaining the zero-sequence voltage of the distribution line automation switch; In the case where it is determined that the zero-sequence voltage of the distribution line automation switch exceeds the first zero-sequence voltage threshold, determining the automation switch with the maximum zero-sequence voltage in the distribution line; Obtaining an automatic switch PT signal of a maximum zero-sequence voltage in the distribution line; In the case where it is determined that the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line has a lower limit signal, the line break fault position is determined to be the front section of the automatic switch with the maximum zero-sequence voltage in the distribution line; When it is determined that the lower limit signal of the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line is empty, the line break fault position is determined to be the rear section of the automatic switch with the maximum zero-sequence voltage in the distribution line; When it is determined that the zero-sequence voltage of the distribution line automation switch is lower than the first zero-sequence voltage threshold, the line break fault location is determined according to the line break fault monitoring associated data, the trunk line break judgment condition and the branch line break judgment condition.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the line break fault locating method according to any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the line break fault locating method according to any one of claims 1 to 7 when executed.

10. A computer program product comprising a computer program / instructions, wherein: When the computer program / instruction is executed by a processor, the method for locating a line break fault described in any one of claims 1 to 7 is implemented.

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