Method and device for locating a broken line fault, electronic equipment, storage medium and program

Abstract

The embodiment of the application discloses a kind of broken line fault positioning method, device, electronic equipment, storage medium and program, wherein, method includes: obtaining the broken line fault monitoring associated data of real-time collection in the broken line fault monitoring process to distribution line;According to the broken line fault monitoring associated data, the broken line fault in the distribution line is analyzed and positioned, and the broken line fault position in the distribution line is determined;Wherein, the broken line fault monitoring associated data includes switch PT secondary voltage, switch three-phase voltage, three-phase current, distribution transformer voltage, zero sequence voltage and zero sequence current.The technical scheme of the embodiment of the application can accurately judge the broken line fault position in distribution line, to improve the safe operation condition of entire power grid and personal equipment safety.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of fault detection technology, and in particular to a method, device, electronic device, storage medium and program for locating wire breakage faults. Background Technology

[0002] With the continuous improvement of people's living standards and the increasing number of electrical appliances, higher requirements are being placed on the reliability of power supply. The operating environment of power distribution lines is complex and variable. Line breaks (phase loss) frequently occur due to external damage, equipment aging, extreme weather, and inadequate operation and maintenance. There are also cases where high-resistance grounding of power distribution lines causes the zero-sequence grounding protection of switches to fail to operate in a timely and correct manner. Traditionally, fault location for power distribution line breaks mainly relies on manual inspections and regular maintenance.

[0003] In the process of realizing this invention, the inventors discovered the following defects in the prior art: the traditional method for locating faults in power distribution lines cannot accurately locate the fault location and requires a lot of time, manpower and resources. Summary of the Invention

[0004] This invention provides a method, device, electronic equipment, storage medium, and program for locating open circuit faults, which can accurately determine the location of open circuit faults in power distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

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

[0006] Acquire real-time associated data of line breakage monitoring during the monitoring of line breakage faults in power distribution lines;

[0007] Based on the associated data of the line breakage monitoring, the line breakage fault in the power distribution line is analyzed and located to determine the location of the line breakage fault in the power distribution line.

[0008] The associated data for monitoring the line breakage fault includes the secondary voltage of the potential transformer (PT), the three-phase voltage of the switch, the three-phase current, the voltage of the distribution transformer, the zero-sequence voltage, and the zero-sequence current.

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

[0010] The line breakage fault monitoring associated data acquisition module is used to acquire the line breakage fault monitoring associated data collected in real time during the process of monitoring line breakage faults in power distribution lines.

[0011] The open circuit fault location determination module is used to perform open circuit fault analysis and location on the power distribution line based on the open circuit fault monitoring correlation data, and determine the location of the open circuit fault in the power distribution line.

[0012] The associated data for monitoring the line breakage fault includes the secondary voltage of the switch PT, the three-phase voltage of the switch, the three-phase current, the voltage of the distribution transformer, the zero-sequence voltage, and the zero-sequence current.

[0013] According to another aspect of the present invention, an electronic device is provided, 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 that can be executed by the at least one processor, which enables the at least one processor to perform the disconnection fault location method according to any embodiment of the present invention.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the disconnection fault location method according to any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer program product is also provided, comprising a computer program that, when executed by a processor, implements the disconnection fault location method according to any embodiment of the present invention.

[0019] This invention, through the acquisition of real-time monitoring data related to line breakage in power distribution lines, further analyzes and locates line breakage faults in the power distribution lines based on the monitoring data, thereby determining the location of line breakage faults in the power distribution lines. This solves the problem of inaccurate location of line breakage faults in existing power distribution lines, and can accurately determine the location of line breakage faults in power distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart of a wire breakage fault location method provided in Embodiment 1 of the present invention;

[0023] Figure 2 This is a flowchart of a method for locating a broken wire fault provided in Embodiment 2 of the present invention;

[0024] Figure 3 This is a flowchart of a wire breakage fault location method provided in Embodiment 3 of the present invention;

[0025] Figure 4 This is a flowchart of a method for locating open circuit faults in a main line, provided in Embodiment 3 of the present invention.

[0026] Figure 5 This is a flowchart of a method for locating open circuit faults based on relevant data from a branch switch, provided in Embodiment 3 of the present invention.

[0027] Figure 6 This is a flowchart of a method for locating a broken wire fault provided in Embodiment 4 of the present invention;

[0028] Figure 7 This is a flowchart of a specific method for locating a broken wire fault provided in Embodiment 4 of the present invention;

[0029] Figure 8 This is a flowchart of a wire breakage fault location method provided in Embodiment 5 of the present invention;

[0030] Figure 9 This is a flowchart of a specific method for locating a broken wire fault provided in Embodiment 5 of the present invention;

[0031] Figure 10 This is a schematic diagram of a wire breakage fault location device provided in Embodiment Six of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of an electronic device provided in Embodiment 7 of the present invention. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort 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, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] Example 1

[0036] Figure 1 This is a flowchart of a method for locating a broken wire fault according to Embodiment 1 of the present invention. This embodiment is applicable to determining the location of a broken wire fault in a power distribution line. The method can be executed by a broken wire fault location device, which can be implemented in software and / or hardware, and is generally integrated into an electronic device, which can be a terminal device or a server device. Correspondingly, as... Figure 1 As shown, the method includes the following operations:

[0037] S110. Obtain the associated data of the line breakage monitoring collected in real time during the process of monitoring the line breakage fault of the power distribution line.

[0038] In this context, a power distribution line can be a power line in a power system used to transmit electrical energy from a power plant or substation to the user end. For example, a power distribution line may include, but is not limited to, medium-voltage power distribution lines, such as 10kV power distribution lines. The line break fault monitoring associated data can be data used to monitor and analyze line break faults when they occur in the power distribution line. For example, the line break fault monitoring associated data may include, but is not limited to, secondary voltage of the switch PT, three-phase voltage of the switch, three-phase current, voltage of the distribution transformer, zero-sequence voltage, and zero-sequence current.

[0039] Among them, the data associated with the monitoring of open circuit faults can be relevant data used to analyze whether an open circuit fault has occurred in the power distribution line and to locate the location of the open circuit fault. For example, the data associated with the monitoring of open circuit faults may include, but is not limited to, the secondary voltage of the switch PT, the three-phase voltage of the switch, the three-phase current, the voltage of the distribution transformer, the zero-sequence voltage, and the zero-sequence current.

[0040] Correspondingly, conventional methods are insufficient for accurately locating open circuit faults in power distribution lines. To promptly detect open circuit faults in power distribution lines, it is necessary to acquire real-time monitoring data related to open circuit faults during the monitoring process. Furthermore, this monitoring data can be used to analyze and locate the open circuit fault, thereby determining its position within the power distribution line.

[0041] S120. Based on the disconnection fault monitoring correlation data, perform disconnection fault analysis and location on the power distribution line to determine the location of the disconnection fault in the power distribution line.

[0042] The location of the open circuit fault can be any location in the power distribution line where an open circuit fault occurs. For example, the location of the open circuit fault may include, but is not limited to, a distribution transformer on the main line or a switch on a branch line. This embodiment of the invention does not limit the location of the open circuit fault.

[0043] In this embodiment of the invention, after acquiring the real-time monitoring data associated with the line breakage during the monitoring of the line breakage in the power distribution line, the line breakage in the power distribution line can be analyzed and located based on the monitoring data associated with the line breakage, thereby further determining the location of the line breakage in the power distribution line, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0044] This invention, through the acquisition of real-time monitoring data related to line breakage in power distribution lines, further analyzes and locates line breakage faults in the power distribution lines based on the monitoring data, thereby determining the location of line breakage faults in the power distribution lines. This solves the problem of inaccurate location of line breakage faults in existing power distribution lines, and can accurately determine the location of line breakage faults in power distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0045] Example 2

[0046] Figure 2 This is a flowchart of a method for locating a broken wire fault according to Embodiment 2 of the present invention. This embodiment is a specific embodiment based on the above embodiment. In this embodiment, various specific optional implementation methods are given for analyzing and locating broken wire faults in power distribution lines based on broken wire fault monitoring correlation data. Accordingly, such as Figure 2As shown, the method in this embodiment may include:

[0047] S210. Obtain the associated data of the line breakage monitoring collected in real time during the process of monitoring the line breakage fault of the power distribution line.

[0048] S220. If a fault signal is determined to exist in the substation, the fault is analyzed and located based on the fault monitoring data to determine the location of the fault.

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

[0050] In this embodiment of the invention, when a fault signal exists in the substation, the fault can be analyzed and located based on the associated data of the fault monitoring, thereby improving the processing speed of the fault.

[0051] In an optional embodiment of the present invention, the step of analyzing and locating the line break fault based on the line break fault monitoring correlation data to determine the location of the line break fault may include: if a fault signal is determined to exist in the substation, determining the line location of the line break fault in the distribution line based on the line break fault monitoring correlation data; if the line break fault is determined to be located on the main line of the distribution line, determining the location of the line break fault based on the line break fault monitoring correlation data and the main line line breakage judgment condition; if the line break fault is determined to be located on a branch line of the distribution line, determining the location of the line break fault based on the line break fault monitoring correlation data and the branch line line breakage judgment condition.

[0052] In a power system, a trunk line can be the main power line in the distribution network, connecting large power plants, high-capacity users, and adjacent sub-grids. A branch line is a distribution line that branches off from the trunk line and supplies power to specific areas or users. Trunk line disconnection detection criteria are used to locate the location of a disconnection fault in the trunk line of a distribution network. Branch line disconnection detection criteria are used to locate the location of a disconnection fault in a branch line of a distribution network.

[0053] In this embodiment of the invention, when a fault signal exists within the substation, the location of a line break fault in the distribution line can be determined. First, the location of the line break fault can be determined based on the line break fault monitoring correlation data, specifically whether it is on the main line or a branch line of the distribution line. Further, if the line break fault is determined to be on the main line of the distribution line, the location can be determined based on the line break fault monitoring correlation data and the main line break fault judgment conditions; if the line break fault is determined to be on a branch line of the distribution line, the location can be determined based on the line break fault monitoring correlation data and the branch line break fault judgment conditions. It is understood that the line break fault monitoring correlation data will differ depending on whether the line break fault is on the main line or a branch line of the distribution line.

[0054] In this embodiment of the invention, when a fault signal is determined to exist in the substation, the fault is analyzed and located based on the associated data of the fault monitoring, the fault judgment conditions of the main line and the fault judgment conditions of the branch line. This solves the problem that the fault location cannot be accurately located in the existing power distribution lines. It can accurately determine the fault location in the power distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0055] Example 3

[0056] Figure 3 This is a flowchart of a method for locating a broken wire fault according to Embodiment 3 of the present invention. This embodiment is a specific implementation based on the above embodiment. In this embodiment, various specific optional implementation methods are given for analyzing and locating broken wire faults in power distribution lines based on broken wire fault monitoring correlation data. Accordingly, such as Figure 3 As shown, the method in this embodiment may include:

[0057] S310. Obtain the associated data of the line breakage monitoring collected in real time during the process of monitoring the line breakage fault of the power distribution line.

[0058] S320. If a fault signal is determined to exist in the substation, the fault is analyzed and located based on the fault monitoring data to determine the location of the fault.

[0059] S330. If a fault signal is determined to exist in the substation, the location of the fault in the distribution line is determined based on the fault monitoring correlation data.

[0060] S340: Determine if the main switch is activated. If yes, execute S360; otherwise, execute S350.

[0061] S350. Determine the location of the open circuit fault on the branch line based on the associated detection data of the branch switch.

[0062] The associated detection data of the branch switch can be data used to detect the location of the open circuit fault on the branch line when an open circuit fault occurs in the distribution line. For example, the associated detection data of the branch switch may include, but is not limited to, the PT voltage, switch current, switch current imbalance, and the sudden change in switch current imbalance on the branch switch side.

[0063] The switching current imbalance refers to a situation where, without the influence of external forces such as operation or defects, the three-phase currents are inconsistent and change with the load in the same trend. The formula for calculating the switching current imbalance is as follows:

[0064]

[0065] Where, α X For the switching current imbalance, I a I b I c These are the three-phase currents of the switch, I avg This represents the average three-phase current of the switch.

[0066] The sudden change in switching current imbalance can refer to a sudden increase or decrease in the three-phase current imbalance caused by external disturbances. The formula for calculating the sudden change in switching current imbalance is as follows:

[0067] β X =|α X -α' X |

[0068] Where, β X α is the abrupt change in the switching current imbalance. X Let α' be the current imbalance of the switching current at the current moment. X This represents the current imbalance of the switch at the previous moment.

[0069] S360. Determine whether the main switch meets the first switch condition. If yes, execute S370; otherwise, execute S390.

[0070] S370. Determine the location of the open circuit fault as the initial predicted position between the main switch and the upstream switch of the main switch on the main line.

[0071] The main switch operation can be the closing and opening of the main line switch in the power distribution line. Whether the main switch operates can determine whether a line break fault exists in the power distribution line. The first switch condition can be a judgment condition set based on relevant data from the main switch, which can be used to assist in determining the location of the line break fault. Optionally, the first switch condition can be configured based on data changes in the main switch when a line break fault occurs in the main line of the power distribution line. For example, the first switch condition may include any phase of the secondary voltage of the main switch PT exceeding a first threshold and any phase current of the three phases being zero. The initial predicted location can be an initial range for determining the location of the line break fault in the power distribution line after determining that the main switch has operated and meets the first switch condition.

[0072] Accordingly, if it is determined that the main switch has been activated, the location of the open circuit fault can be preliminarily determined based on the first switch condition. Furthermore, if it is determined that the main switch has been activated and the main switch meets the first switch condition, the location of the open circuit fault is located at an initially predicted position between the main switch and the switch above the main switch on the main line.

[0073] S380. Determine the location of the open circuit fault based on the abnormal voltage data between the main switch and the upstream switch of the main switch and the initial predicted location.

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

[0075] In this embodiment of the invention, after determining the initial predicted position between the main switch and the upstream switch on the main line, the specific location of the open circuit fault between the main switch and the upstream switch can be accurately determined based on the abnormal voltage data between the main switch and the upstream switch, combined with the initial predicted position.

[0076] In a specific example Figure 4 This is a flowchart of a method for locating open circuit faults in a main line, provided in Embodiment 3 of the present invention. Figure 4As shown, when a fault signal exists in a distribution line, the first step is to check if the location of the fault signal is a regular open-loop point. If it is not a regular open-loop point, it indicates that the power supply is using an abnormal power supply method (transfer power supply). In this case, it is necessary to check which switch the actual open-loop point is on, and then connect the line from the actual open-loop point to the tie switch to the power supply line, and execute the above-mentioned open-loop fault location judgment process. If it is a regular open-loop point, the above-mentioned open-loop fault location judgment process is executed directly. If it is determined that a switch in the substation or on the main line has operated, and the voltage of any phase of the secondary voltage of the switch PT exceeds 70V and the current of any phase of the switch is zero, then the open-loop fault location can be determined as the initial pre-judged location between the main switch and the switch above the main switch on the main line. If the open-loop fault location is determined to be the initial pre-judged location between the main switch and the switch above the main switch on the main line, the location of the first distribution transformer with an abnormal voltage along the power flow direction can be determined as the open-loop fault location. If the location of the open circuit fault is determined not to be the initial predicted location between the main switch and the upstream switch on the main line, the determination of the location of the open circuit fault in the distribution line under this condition can be terminated. The distribution transformer may include, but is not limited to, public distribution transformers and dedicated distribution transformers.

[0077] In a specific example, taking a 10kV distribution line, if any phase on the low-voltage side of a public distribution transformer experiences a voltage drop below 70% of normal, and the current in that phase is greater than 0, it can be determined that a break has occurred on the high-voltage side of the public distribution transformer. When either phase A or phase C of a dedicated distribution transformer experiences a phase break, only one phase of phases A and C will have a line voltage of 100V, while the other phase will have a voltage of 0. When phase B experiences a phase break, both phases A and C will display half voltage. Therefore, if the voltage drops below 70V, it can be determined that a break has occurred in phase B of the dedicated distribution transformer.

[0078] S390. Determine whether the main switch meets the second switch condition. If yes, execute S3100; otherwise, end the determination of the location of the open circuit fault in this case.

[0079] The second switching condition can be a judgment condition set based on relevant data from the main switch, which can be used to assist in determining the location of the open circuit fault. Optionally, the second switching condition can be configured based on data showing changes in the main switch when an open circuit fault occurs in a branch line of the distribution line. For example, the second switching condition may include, but is not limited to, the secondary voltage of the main switch PT not exceeding a first threshold and / or the three-phase current not being zero, and the current imbalance of the main switch exceeding a second threshold and / or the sudden change in the current imbalance of the main switch exceeding a third threshold.

[0080] The first threshold can be the secondary voltage value of the main switch PT when the power distribution line is operating normally; for example, the first threshold can be 70V. The second threshold can be the current imbalance value of the main switch when the power distribution line is operating normally; for example, the second threshold can be 25%. The third threshold can be the sudden change value of the current imbalance of the main switch when the power distribution line is operating normally; for example, the third threshold can be 10%. It should be noted that the values ​​of the secondary voltage value of the main switch PT, the current imbalance of the main switch, and the sudden change value of the current imbalance of the main switch are different in different regions. That is, the specific values ​​of the first, second, and third thresholds can be determined according to the specific operating conditions of the power distribution line. This embodiment of the invention does not limit the specific values ​​of the first, second, and third thresholds.

[0081] In this embodiment of the invention, when determining the location of a line break fault based on monitoring data associated with the line break fault and the branch line line break judgment conditions, if it is determined that a main switch has been activated and the main switch meets the second switching condition, then the location of the line break fault can be determined to be on the branch line. It is understood that if the main switch does not meet the second switching condition, it indicates that the main switch meets the first switching condition.

[0082] In a specific example, if it is determined that the main switch has been activated and the secondary voltages of the main switch PTs do not exceed 70V and / or the three-phase currents are not zero, then when the main switch meets the conditions that the main switch current imbalance exceeds 25% and / or the main switch current imbalance mutation exceeds 10%, the location of the open circuit fault can be determined to be in the branch line.

[0083] S3100: Determine whether the branch switch is an automated branch switch and whether the automated branch switch is activated. If yes, execute S350; otherwise, execute S3110.

[0084] In this embodiment of the invention, if the location of the open circuit fault is determined to be on a branch line, it can be determined whether the branch switch is an automated branch switch and whether the automated branch switch is activated. Further, if it is determined that the branch switch is an automated branch switch and is activated, the location of the open circuit fault on the branch line can be determined based on the associated detection data of the branch switch; if it is determined that the branch switch is an automated branch switch but is not activated, the determination of the location of the open circuit fault in this case can be terminated.

[0085] S3110. Determine the location of the open circuit fault in the branch line based on the abnormal data of the distribution transformer voltage in the power flow direction of the branch switch.

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

[0087] In a specific example Figure 5 This is a flowchart of a method for locating open-circuit faults based on relevant data from a branch switch, provided in Embodiment 3 of the present invention. Figure 5 As shown, we can first determine whether the branch switch is an automated branch switch. If it is determined that the branch switch is not an automated branch switch, we can check 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, we can determine the location of the open circuit fault as the point from the distribution transformer with the first abnormal voltage along the power flow direction to the T-junction of the main line. If there is no distribution transformer with abnormal voltage along the power flow direction, we can end the determination of the open circuit fault location in this case.

[0088] If the switch is determined to be an automated branch switch, it can be determined whether the automated branch switch has operated. If it is determined that the automated switch has not operated, the determination of the open circuit fault location in this case can be terminated. If it is determined that the automated branch switch has operated, the PT voltage and switch current on the switch side can be detected. If the PT voltage on the switch side drops to below 70% of the normal value in any phase, and the current in any phase of the switch is zero, then the open circuit fault location in the branch line can be determined to be between the main line T-contact and the branch switch. If the PT voltage on the switch side is normal, and the current in any phase of the switch is zero, then the open circuit fault location in the branch line can be determined to be between the switch load side and the first power supply point of the branch line.

[0089] On the other hand, such as Figure 5 As shown, it can be detected whether the switch current imbalance exceeds 25% and / or whether the sudden change in switch current imbalance exceeds 10%. If either exceeds the above threshold, it can be further detected whether there is a distribution transformer with abnormal voltage along the power flow direction. If there is a distribution transformer with abnormal voltage, the location of the open circuit fault in the branch line can be determined from the distribution transformer where the voltage abnormality first appears along the power flow direction to the switch load side. If neither the switch current imbalance nor the sudden change in switch current imbalance exceeds the above threshold, the determination of the open circuit fault location under this condition can be terminated.

[0090] This invention, through obtaining real-time monitoring data related to line breakage during the monitoring of power distribution line open circuits, further determines the location of the open circuit fault in the main or branch lines of the power distribution line based on the monitoring data. This solves the problem of the inability to accurately locate the open circuit fault in existing power distribution lines, and can accurately determine the location of the open circuit fault in the power distribution line, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0091] Example 4

[0092] Figure 6 This is a flowchart of a method for locating open-circuit faults according to Embodiment 4 of the present invention. This embodiment is based on the above embodiment and is further specified. In this embodiment, various specific optional implementation methods are given for analyzing and locating open-circuit faults in power distribution lines based on the disconnection data of the power metering of the distribution transformer. Accordingly, such as Figure 6 As shown, the method in this embodiment may include:

[0093] S410. Acquire the real-time monitoring data associated with the disconnection fault during the monitoring of power distribution line disconnection faults.

[0094] S420. If a fault signal is found to exist in the substation, the fault is analyzed and located based on the fault monitoring data to determine the location of the fault.

[0095] S430: Obtain offline data of power metering of distribution transformer.

[0096] Among them, the offline data of the power metering of the distribution transformer can be the data on the offline status of the power metering of the distribution transformer.

[0097] Figure 7 This is a flowchart of a specific method for locating a broken wire fault, provided in Embodiment 4 of the present invention. Figure 7 As shown, when a fault signal exists in the substation, the offline data of the power metering of the distribution transformer can be obtained and an offline list can be generated, thereby determining whether the power metering of the distribution transformer is in an offline state.

[0098] S440: Determine if the power metering of the distribution transformer is online. If yes, execute S480; otherwise, execute S450.

[0099] S450. Obtain AC energy meter signal association data, wherein the AC energy meter signal association data includes three-phase AC energy meter signals and low-voltage AC energy meter signals.

[0100] The AC energy meter signal association data can be AC ​​energy meter association data that can be used to detect the location of a line break fault in a power distribution line. For example, the AC energy meter signal association data can include three-phase AC energy meter signals and low-voltage AC energy meter signals.

[0101] In this embodiment of the invention, after obtaining the offline data of the power metering of the distribution transformer, it can be determined whether the power metering of the distribution transformer is in an offline state based on the offline data. Furthermore, if it is determined that the power metering of the distribution transformer is in an offline state, AC energy meter signal correlation data can be obtained, thereby determining the location of the disconnection fault based on the AC energy meter signal correlation data.

[0102] S460: Determine whether the signals of the target number of three-phase AC energy meters are simultaneously missing a phase and the low-voltage AC energy meter signal is stable. If yes, execute S470; otherwise, end the determination of the location of the open circuit fault under this condition.

[0103] The target number can be the number of three-phase AC energy meters whose signals have dropped, which can be used to determine if there is a break in the power distribution line. For example, the target number can be at least three meters.

[0104] S470. The location of the line breakage fault is determined to be the high-voltage side of the distribution transformer.

[0105] In this embodiment of the invention, after acquiring the AC energy meter signal correlation data, it can be determined whether there exists a target number of three-phase AC energy meter signals simultaneously experiencing phase loss while the low-voltage AC energy meter signal remains stable, i.e., there is no large-scale disconnection. Further, if it is determined that a target number of three-phase AC energy meter signals simultaneously experience phase loss and the low-voltage AC energy meter signal is stable, the location of the disconnection fault can be determined to be on the high-voltage side of the distribution transformer. If it is determined that there is no target number of three-phase AC energy meter signals simultaneously experiencing phase loss, or if the low-voltage AC energy meter signal is unstable, the determination of the disconnection fault location under this condition can be terminated.

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

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

[0108] In this embodiment of the invention, after obtaining the offline data of the power metering of the distribution transformer, it can be determined whether the power metering of the distribution transformer is in an offline state based on the offline data. Furthermore, if the power metering of the distribution transformer is in an online state, the voltage data of the distribution transformer in the power distribution line can be obtained, thereby determining the location of the open circuit fault based on the voltage data.

[0109] S490: Determine if there is any abnormality in the voltage data of the distribution transformer. If yes, execute S4100; otherwise, end the determination of the location of the open circuit fault under this condition.

[0110] S4100, The location of the open circuit fault is determined to be the high-voltage side of the distribution voltage transformer.

[0111] In this embodiment of the invention, after acquiring the voltage data of the distribution transformer in the power distribution line, it can be determined whether there is any abnormality in the distribution transformer voltage data. Further, if it is determined that there is an abnormality in the distribution transformer voltage data, the location of the open circuit fault can be determined to be on the high-voltage side of the distribution transformer. If it is determined that there is no abnormality in the distribution transformer voltage data, the determination of the open circuit fault location under this condition can be terminated.

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

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

[0114] In this embodiment of the invention, when it is determined that the fault signal of the power distribution line is empty, the monitoring data associated with the line breakage fault can be acquired periodically. Furthermore, based on the monitoring data associated with the line breakage fault, the line breakage judgment conditions of the main line and the line breakage judgment conditions of the branch line, it can be determined whether there is a line breakage fault in the power distribution line and the location of the line breakage fault.

[0115] It is understandable that even when there are no fault signals within the substation, there may still be open circuits in the power distribution lines. Therefore, the location of an open circuit can be determined by periodically executing the aforementioned judgment process when fault signals exist within the substation. Figure 4 As shown, when it is determined that a main switch has been activated and the main switch meets the first switching condition, the location of the open circuit fault can be determined as the initial predicted location between the main switch and its upstream switch on the main line. The first switching condition includes any phase of the secondary voltage of the main switch's PT exceeding a first threshold and any phase current being zero. The location of the open circuit fault is determined based on the abnormal voltage data between the main switch and its upstream switch, as well as the initial predicted location. If it is determined that no main switch has been activated, the location of the open circuit fault on the branch line is determined based on the associated detection data of the branch switch. The associated detection data of the branch switch includes the PT voltage, switching current, switching current imbalance, and the sudden change in switching current imbalance on the branch switch side. Alternatively, if it is determined that a main switch is activated and the main switch meets the second switching condition, the location of the open circuit fault can be determined to be on a branch line. The second switching condition includes that the secondary voltages of the main switch PTs do not exceed a first threshold and / or the three-phase currents are not zero, and the main switch current imbalance exceeds a second threshold and / or the sudden change in the main switch current imbalance exceeds a third threshold. If it is determined that the branch switch is an automated branch switch and the automated branch switch is activated, the location of the open circuit fault on the branch line is determined based on the associated detection data of the branch switch. The associated detection data of the branch switch includes the PT voltage, switch current, switch current imbalance, and sudden change in switch current imbalance on the branch switch side. If it is determined that the branch switch is not an automated branch switch, the location of the open circuit fault on the branch line is determined based on abnormal data of the distribution transformer voltage in the power 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 power metering disconnection data and the associated data of the disconnection fault monitoring of the distribution transformer are carried out simultaneously.

[0117] This invention determines whether the power metering of a distribution transformer has gone offline by acquiring disconnection data from the transformer's power meter. Furthermore, based on the associated data of AC power meter signals or voltage data from the distribution transformer, the location of the open circuit fault can be determined, solving the problem of inaccurate location of open circuit faults in existing distribution lines. This allows for accurate determination of the location of open circuit faults in distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0118] Example 5

[0119] Figure 8This is a flowchart of a method for locating a broken wire fault according to Embodiment 5 of the present invention. This embodiment is based on the above embodiment and is further specified. In this embodiment, various specific optional implementation methods are given for analyzing and locating broken wire faults in power distribution lines based on broken wire fault monitoring correlation data. Accordingly, such as Figure 8 As shown, the method in this embodiment may include:

[0120] S510. Acquire the real-time monitoring data associated with the disconnection fault during the monitoring of power distribution line disconnection faults.

[0121] S520. If it is determined that there are both upper and lower limit signals in the voltage of the substation and the duration of the upper and lower limit signals exceeds the first time threshold, the location of the line break fault in the power distribution line is determined according to the line break fault monitoring correlation data.

[0122] The upper and lower limit signals can be over-limit alarm signals in a substation monitoring system, used to indicate whether a line break fault has occurred in the distribution line and to locate the fault location. For example, the upper and lower limit signals can include, but are not limited to, voltage over-limit signals; this embodiment of the invention does not limit the specific parameter types included in the upper and lower limit signals. The first time threshold can be the maximum duration for which the voltage over-limit signal can persist under normal operating conditions of the distribution line. For example, the first time threshold can be 5 seconds. It is understood that the specific value of the first time threshold can be determined according to the specific operating conditions of the distribution line; this embodiment of the invention does not limit the specific value of the first time threshold.

[0123] In this embodiment of the invention, a high-resistance grounding fault in the power distribution line will cause the switch zero-sequence grounding protection to fail to operate in a timely and correct manner. Therefore, it is necessary to determine the location of the open circuit fault in the power distribution line based on the open circuit fault monitoring correlation data when it is determined that the voltage in the substation simultaneously has upper and lower limit signals and the duration of the voltage upper and lower limit signals exceeds the first time threshold, so as to improve the operational safety of the power distribution line.

[0124] S530. Obtain the grounding alarm signal data of the automatic switch of the power distribution line.

[0125] The grounding alarm signal data can be alarm information generated by an automatic switch when a line break occurs in the power 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, etc. This embodiment of the invention does not limit the specific content of the grounding alarm signal data.

[0126] S540: Determine whether there is a grounding alarm signal in the automatic switch of the power distribution line. If yes, execute S550; otherwise, execute S560.

[0127] S550. Determine that the location of the open circuit fault is the line downstream of the lowest-level automatic switch that has generated a grounding alarm signal.

[0128] Specifically, if the fault type is determined to be a disconnection fault, the grounding alarm signal data of the automatic switch of the distribution line can be obtained. Furthermore, the existence of a grounding alarm signal can be determined based on the grounding alarm signal data of the automatic switch of the distribution line. Thus, if the existence of a grounding alarm signal is determined based on the grounding alarm signal data of the automatic switch of the distribution line, the location of the disconnection fault can be determined to be the line downstream of the lowest-level automatic switch where the grounding alarm signal occurred.

[0129] In a specific example Figure 9 This is a flowchart of a specific method for locating a broken wire fault, provided in Embodiment 5 of the present invention. Figure 9 As shown, if the zero-sequence current 3I0 is determined to be no less than 30A based on the grounding alarm signal data, then the location of the open circuit fault can be determined to be the line downstream of the lowest-level automatic switch that issued the grounding alarm signal.

[0130] S560. Obtain the zero-sequence voltage of the automatic switch of the power distribution line. Determine whether the zero-sequence voltage of the automatic switch of the power distribution line exceeds the first zero-sequence voltage threshold. If yes, execute S590; otherwise, execute S570.

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

[0132] S570. Determine the location of the line breakage fault based on the associated monitoring data of the line breakage fault, the line breakage judgment conditions of the main line and the line breakage judgment conditions of the branch line.

[0133] In this embodiment of the invention, if it is determined that the zero-sequence voltage of the automatic switch of the power distribution line is lower than the first zero-sequence voltage threshold, then there may be a high-resistance grounding open-circuit fault in the power distribution line, and the location of the open-circuit fault is relatively far away. Furthermore, based on the open-circuit fault monitoring correlation data, the main line open-circuit judgment conditions, and the branch line open-circuit judgment conditions, it can be determined whether an open-circuit fault exists in the power distribution line, and if an open-circuit fault is determined, the location of the open-circuit fault can be determined.

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

[0135] Among them, the lower limit signal can be an alarm signal issued when the signal of the automatic switch PT in the power distribution line drops below the set safety threshold.

[0136] In this embodiment of the invention, when it is determined that the ground alarm signal is empty based on the ground alarm signal data of the automatic distribution line switch, the zero-sequence voltage of the automatic distribution line switch can be obtained. Furthermore, when it is determined that the zero-sequence voltage of the automatic distribution line switch exceeds a first zero-sequence voltage threshold, the automatic distribution line switch with the maximum zero-sequence voltage can be identified. Therefore, the location of the open circuit fault in the distribution line can be determined based on the PT signal of the automatic distribution line switch with the maximum zero-sequence voltage. It is understood that when the zero-sequence voltage does not exceed the first zero-sequence voltage threshold, the distribution line is operating normally without an open circuit fault.

[0137] S590. The location of the open circuit fault is determined to be the line upstream of the automatic switch with the maximum zero-sequence voltage in the power distribution line.

[0138] In this embodiment of the invention, when it is determined that the zero-sequence voltage of the automatic switch of the distribution line exceeds a first zero-sequence voltage threshold, the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line is obtained. Furthermore, when it is determined that the PT signal of the automatic switch with the maximum zero-sequence voltage in the distribution line contains a signal exceeding the lower limit, the location of the open circuit fault can be determined to be the line upstream of the automatic switch with the maximum zero-sequence voltage in the distribution line.

[0139] S5100, The location of the open circuit fault is determined to be the downstream section of the automatic switch of the power distribution line where the zero-sequence voltage is at its maximum value.

[0140] In this embodiment of the invention, when it is determined that there is no lower limit signal of the automatic switch PT with the maximum zero-sequence voltage in the power distribution line, the location of the open circuit fault can be determined to be the line downstream of the automatic switch with the maximum zero-sequence voltage in the power distribution line.

[0141] This invention acquires grounding alarm signal data and zero-sequence voltage from the automatic switch of the power distribution line, and further analyzes and locates the open circuit fault in the power distribution line based on the grounding alarm signal data and zero-sequence voltage, thereby determining the location of the open circuit fault in the power distribution line. This solves the problem of the inability to accurately locate the open circuit fault in existing power distribution lines, and can accurately determine the location of the open circuit fault in the power distribution line, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0142] Example 6

[0143] Figure 10 This is a schematic diagram of a wire breakage fault location device provided in Embodiment Six of the present invention, as shown below. Figure 10As shown, the device includes: a wire breakage fault monitoring and related data acquisition module 610 and a wire breakage fault location determination module 620, wherein:

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

[0145] The open circuit fault location determination module 620 is used to perform open circuit fault analysis and location on the power distribution line based on the open circuit fault monitoring correlation data, and determine the location of the open circuit fault on the power distribution line.

[0146] The associated data for monitoring the line breakage fault includes the secondary voltage of the switch PT, the three-phase voltage of the switch, the three-phase current, the voltage of the distribution transformer, the zero-sequence voltage, and the zero-sequence current.

[0147] This invention, through the acquisition of real-time monitoring data related to line breakage in power distribution lines, further analyzes and locates line breakage faults in the power distribution lines based on the monitoring data, thereby determining the location of line breakage faults in the power distribution lines. This solves the problem of inaccurate location of line breakage faults in existing power distribution lines, and can accurately determine the location of line breakage faults in power distribution lines, thereby improving the safe operation of the entire power grid and the safety of personnel and equipment.

[0148] 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 there is a fault signal in the substation, analyze and locate the line break fault according to the line break fault monitoring association data, and determine the location of the line break fault.

[0149] In an optional embodiment of the present invention, the line break fault location determination module 620 may also be used to: determine the line location of the line break fault in the distribution line based on the line break fault monitoring correlation data when a fault signal is determined to exist in the substation; determine the line break fault location based on the line break fault monitoring correlation data and the main line breakage judgment condition when the line break fault location is determined to be in the main line of the distribution line; and determine the line break fault location based on the line break fault monitoring correlation data and the branch line breakage judgment condition when the line break fault location is determined to be in the branch line of the distribution line.

[0150] In an optional embodiment of the present invention, the open circuit fault location determination module 620 can also be used to: determine the open circuit fault location as an initial predicted location between the main switch and its upstream switch on the main line when it is determined that a main switch has been activated and the main switch meets a first switching condition; wherein, the first switching condition includes any phase of the secondary voltage of the main switch PT exceeding a first threshold and any phase current of the three phases being zero; determine the open circuit fault location based on the abnormal voltage data between the main switch and its upstream switch and the initial predicted location; and determine the open circuit fault location on the branch line based on the associated detection data of the branch switch when it is determined that no main switch has been activated; wherein, the associated detection data of the branch switch includes the PT voltage, switching current, switching current imbalance, and switching current imbalance abrupt change.

[0151] In an optional embodiment of the present invention, the open-circuit fault location determination module 620 can also be used to: determine that the open-circuit fault location is located on a branch line when it is determined that a main switch is activated and the main switch meets a second switching condition; wherein, the second switching condition includes that the secondary voltages of the main switch PTs do not exceed a first threshold and / or the three-phase currents are not zero, and the main switch current imbalance exceeds a second threshold and / or the main switch current imbalance abrupt change exceeds a third threshold; when it is determined that the branch switch is an automated branch switch and the automated branch switch is activated, determine the open-circuit fault location on the branch line based on the associated detection data of the branch switch; wherein, the associated detection data of the branch switch includes the PT voltage, switching current, switching current imbalance, and switching current imbalance abrupt change; when it is determined that the branch switch is not an automated branch switch, determine the open-circuit fault location on the branch line based on the abnormal data of the distribution transformer voltage in the power flow direction of the branch switch.

[0152] In an optional embodiment of the present invention, the open circuit fault location determination module 620 can also be used to: acquire offline data of the power metering of the distribution transformer; when it is determined that the power metering of the distribution transformer is in an offline state based on the offline data of the power metering of the distribution transformer, acquire AC power meter signal association data; wherein, the AC power meter signal association data includes three-phase AC power meter signals and low-voltage AC power meter signals; when a target number of three-phase AC power meter signals simultaneously show phase loss and the low-voltage AC power meter signal is determined to be stable, determine that the open circuit fault location is on the high-voltage side of the distribution transformer; when it is determined that the power metering of the distribution transformer is in an online state based on the offline data of the power metering of the distribution transformer, acquire 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, determine that the open circuit fault location is on 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: determine the line break fault location based on the line break fault monitoring associated data, the main line line break judgment conditions and the branch line line break judgment conditions when it is determined that the fault signal in the substation is empty.

[0154] In an optional embodiment of the present invention, the open-circuit fault location determination module 620 may further be used to: determine the line location of the open-circuit fault in the distribution line based on the open-circuit fault monitoring correlation data when it is determined that both upper and lower limit signals exist in the substation voltage and the duration of the upper and lower limit signals exceeds a first time threshold; acquire grounding alarm signal data of the distribution line automation switch; determine the open-circuit fault location as the line downstream of the lowest-level automation switch where the grounding alarm signal appears when it is determined that the grounding alarm signal exists based on the grounding alarm signal data of the distribution line automation switch; acquire 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 is empty; and acquire 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. Under the voltage threshold condition, identify the automatic switch with the maximum zero-sequence voltage in the power distribution line; acquire the PT signal of the automatic switch with the maximum zero-sequence voltage in the power distribution line; if the PT signal of the automatic switch with the maximum zero-sequence voltage in the power distribution line has a lower limit signal, determine that the open circuit fault location is the line upstream of the automatic switch with the maximum zero-sequence voltage in the power distribution line; if the PT signal of the automatic switch with the maximum zero-sequence voltage in the power distribution line has no lower limit signal, determine that the open circuit fault location is the line downstream of the automatic switch with the maximum zero-sequence voltage in the power distribution line; if the zero-sequence voltage of the automatic switch in the power distribution line is lower than the first zero-sequence voltage threshold, determine the open circuit fault location based on the open circuit fault monitoring correlation data, the main line open circuit judgment condition, and the branch line open circuit judgment condition.

[0155] The above-described wire breakage fault location device can execute the wire breakage fault location method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method. Technical details not described in detail in this embodiment can be found in the wire breakage fault location method provided in any embodiment of the present invention.

[0156] Since the above-described wire breakage fault location device is an apparatus capable of executing the wire breakage fault location method in the embodiments of the present invention, those skilled in the art can understand the specific implementation methods and various variations of the wire breakage fault location device in this embodiment based on the wire breakage fault location method described in the embodiments of the present invention. Therefore, how the wire breakage fault location device implements the wire breakage fault location method in the embodiments of the present invention will not be described in detail here. Any apparatus used by those skilled in the art to implement the wire breakage fault location method in the embodiments of the present invention falls within the scope of protection of this application.

[0157] Example 7

[0158] Figure 11A schematic diagram of an electronic device 10 that can be used to implement embodiments 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 processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0159] like Figure 11 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

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

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

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

[0163] Optionally, the method for locating a line break fault may include: acquiring real-time monitoring data associated with line break faults during the monitoring of line break faults in a power distribution line; performing line break fault analysis and location on the line break fault in the power distribution line based on the monitoring data associated with line break faults, and determining the location of the line break fault in the power distribution line; wherein the monitoring data associated with line break faults includes the secondary voltage of the switch PT, the three-phase voltage of the switch, the three-phase current, the voltage of the distribution transformer, the zero-sequence voltage, and the zero-sequence current.

[0164] Various embodiments 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-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0165] Computer programs used to implement 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, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

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

[0167] To provide interaction with a user, the systems and techniques described herein can 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 pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0168] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0169] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0170] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this disclosure can be achieved, and this is not limited herein.

[0171] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method of locating a broken conductor fault, characterized by, The method comprises: acquiring real-time collected line breakage fault monitoring correlation data in line breakage fault monitoring of a power distribution line; performing line breakage fault analysis and positioning on a line breakage fault in the power distribution line according to the line breakage fault monitoring correlation data, to determine a line breakage fault position in the power distribution line; wherein the line breakage fault monitoring correlation data comprises switch voltage transformer (PT) secondary voltage, switch three-phase voltage, switch three-phase current, distribution transformer voltage, switch zero sequence voltage, and switch zero sequence current; wherein the line breakage fault analysis and positioning on the line breakage fault in the power distribution line according to the line breakage fault monitoring correlation data, to determine the line breakage fault position in the power distribution line, comprises: in a case where it is determined that there is a fault signal in the substation, performing analysis and positioning on the line breakage fault according to the line breakage fault monitoring correlation data, to determine the line breakage fault position; the analysis and positioning on the line breakage fault according to the line breakage fault monitoring correlation data, to determine the line breakage fault position, comprises: in a case where it is determined that there is a fault signal in the substation, determining, according to the line breakage fault monitoring correlation data, that the line breakage fault position is in a line position in the power distribution line; in a case where it is determined that the line breakage fault position is in a main line in the power distribution line, determining, according to the line breakage fault monitoring correlation data and main line line breakage judgment conditions, the line breakage fault position; in a case where it is determined that the line breakage fault position is in a branch line in the power distribution line, determining, according to the line breakage fault monitoring correlation data and branch line line breakage judgment conditions, the line breakage fault position.

2. The method of claim 1, wherein, the determination of the line breakage fault position according to the line breakage fault monitoring correlation data and main line line breakage judgment conditions, comprises: in a case where it is determined that there is main switch action and the main switch satisfies a first switch condition, determining that the line breakage fault position is an initial pre-determined position between the main switch and an upper-level switch of the main switch on the main line; wherein the first switch condition comprises that PT secondary voltage of the main switch of any phase exceeds a first threshold value and three-phase current of the main switch of any phase is zero; determining the line breakage fault position according to abnormal voltage data between the main switch and the upper-level switch of the main switch and the initial pre-determined position; in a case where it is determined that there is no main switch action, determining, according to correlation detection data of a branch switch, the line breakage fault position of the line breakage fault on the branch line; wherein the correlation detection data of the branch switch comprises PT voltage on the branch switch side, switch current, switch current unbalance degree, and switch current unbalance degree mutation.

3. The method of claim 1, wherein, the determination of the line breakage fault position according to the line breakage fault monitoring correlation data and branch line line breakage judgment conditions, comprises: determining that the line break fault position is located on the branch line in a case where it is determined that the backbone switch action exists and the backbone switch satisfies a second switch condition; wherein the second switch condition comprises that none of the PT secondary voltages of the backbone switch exceeds a first threshold value and / or none of the three-phase currents of the backbone switch is zero, and the backbone switch current unbalance degree exceeds a second threshold value and / or the backbone switch current unbalance degree mutation value exceeds a third threshold value; determining the line break fault position of the line break fault on the branch line according to associated detection data of the branch switch in a case where it is determined that the branch switch is an automated branch switch and the automated branch switch has action; wherein the associated detection data of the branch switch comprises the branch switch side PT voltage, switch current, switch current unbalance degree and switch current unbalance degree mutation value; determining the line break fault position of the line break fault in the branch line according to abnormal data of the distribution transformer voltage in the direction of the branch switch power flow in a case where it is determined that the branch switch is not an automated branch switch.

4. The method of claim 1, wherein, The analysis and positioning of the line break fault according to the line break fault monitoring associated data to determine the line break fault position comprises: acquiring line drop data of electric energy metering of the distribution transformer; acquiring alternating current energy meter signal associated data in a case where it is determined that the electric energy metering of the distribution transformer is in a line drop state according to the line drop data of electric energy metering of the distribution transformer; wherein the alternating current energy meter signal associated data comprises three-phase alternating current energy meter signals and low-voltage alternating current energy meter signals; determining that the line break fault position is the high-voltage side of the distribution transformer in a case where it is determined that a target number of the three-phase alternating current energy meter signals simultaneously have a phase missing and it is determined that the low-voltage alternating current energy meter signal is stable; acquiring distribution transformer voltage data in the distribution line in a case where it is determined that the electric energy metering of the distribution transformer is in an online state according to the line drop data of electric energy metering of the distribution transformer; determining that the line break fault position is the high-voltage side of the distribution transformer in a case where it is determined that the distribution transformer voltage data is abnormal; The analysis and positioning of the line break fault according to the line break fault monitoring associated data to determine the line break fault position further comprises: determining the line break fault position according to the line break fault monitoring associated data, backbone line line break judgment conditions and branch line line break judgment conditions in a case where it is determined that the substation internal fault signal is empty.

5. The method of claim 1, wherein, The line break fault analysis and positioning of the line break fault in the distribution line according to the line break fault monitoring associated data to determine the line break fault position in the distribution line further comprises: determining that the line break fault position is a line position in the distribution line according to the line break fault monitoring associated data in a case where it is determined that the voltage in the substation simultaneously has over-limit signals and the over-limit signal duration exceeds a first time threshold value; acquiring a ground alarm signal data of the distribution line automated switch; In a case where it is determined according to the ground alarm signal data of the power distribution line automation switch that the ground alarm signal exists, the broken line fault position is determined as a line section behind the automation switch where the ground alarm signal first appears; In a case where it is determined according to the ground alarm signal data of the power distribution line automation switch that the ground alarm signal is empty, the zero sequence voltage of the power distribution line automation switch is acquired; In a case where it is determined that the zero sequence voltage of the power distribution line automation switch exceeds a first zero sequence voltage threshold, the automation switch with the maximum zero sequence voltage in the power distribution line is determined; The PT signal of the automation switch with the maximum zero sequence voltage in the power distribution line is acquired; In a case where it is determined that the PT signal of the automation switch with the maximum zero sequence voltage in the power distribution line has an under-limit signal, the broken line fault position is determined as a line section in front of the automation switch with the maximum zero sequence voltage in the power distribution line; In a case where it is determined that the PT signal of the automation switch with the maximum zero sequence voltage in the power distribution line has no under-limit signal, the broken line fault position is determined as a line section behind the automation switch with the maximum zero sequence voltage in the power distribution line; In a case where it is determined that the zero sequence voltage of the power distribution line automation switch is lower than the first zero sequence voltage threshold, the broken line fault position is determined according to the broken line fault monitoring correlation data, the main line broken line judgment condition and the branch line broken line judgment condition.

6. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected with the at least one processor in communication; 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 to enable the at least one processor to execute the broken line fault positioning method in any one of claims 1-5.

7. A computer readable storage medium characterized in that, The computer readable storage medium stores computer instructions for enabling the processor to execute the broken line fault positioning method in any one of claims 1-5 when executed by the processor.

8. A computer program product comprising computer programs / instructions, wherein, The computer program / instructions enable the processor to execute the broken line fault positioning method in any one of claims 1-5 when executed by the processor.

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