Fault positioning method and device for power transmission line

Abstract

The invention provides a fault positioning method and device for a power transmission line, and the method comprises the steps: obtaining the fault distance measurement related data of the power transmission line, including a tower sequence, a numerical sequence of each adjacent tower section, and a left-side and right-side accumulated threshold value; in the left part of the numerical value sequence, sequentially accumulating from the numerical value of the first section to the tail end direction, stopping when the accumulated value is not smaller than a left accumulated threshold value for the first time, and determining the corresponding target tower at the moment as a left end positioning result; on the right side part of the section numerical value sequence, reverse-order accumulation is carried out from the tail end section numerical value to the head end direction, when the accumulated value is not smaller than a right side accumulated threshold value for the first time, the accumulation is stopped, and the corresponding target tower at the moment is determined to serve as a right end positioning result; calculating the sum of all numerical values in the section numerical value sequence; and determining a fault interval based on the left positioning result, the right positioning result and the sum. According to the invention, the rapid fault positioning efficiency of the power transmission line is improved, and the positioning precision is ensured.

Description

Technical Field

[0001] This invention belongs to the field of power transmission line fault detection, and particularly relates to a fault location method and apparatus for power transmission lines. Background Technology

[0002] High-voltage transmission lines are the backbone of the power system, and their safe and stable operation is crucial to ensuring power supply reliability. Once a line fault occurs, quickly and accurately locating the fault point is key to shortening power outage time, reducing economic losses, and improving operation and maintenance efficiency. Among the technologies related to high-voltage line fault location, the industry mainly relies on the following two types of technical solutions:

[0003] One type uses professional hardware diagnostic equipment. Although such equipment has high positioning accuracy, it has problems such as high purchase cost, complex installation and debugging, and the need for professional personnel to operate, making it difficult to be widely used in small and medium-sized new energy power stations.

[0004] The second method relies on maintenance personnel to manually inspect and locate faults by testing each component, such as line towers, insulators, and cable joints. This method is extremely inefficient, especially in long-distance and complex terrain scenarios, where it often takes several hours or even days to locate the fault, which is far behind the need for the station to quickly restore power. Summary of the Invention

[0005] The purpose of this invention is to provide a fault location method and apparatus for power transmission lines, aiming to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] According to an embodiment of the present invention, a fault location method for transmission lines is provided, comprising the following steps:

[0008] Acquire fault location data for transmission lines, including tower sequence, numerical sequence of adjacent tower sections, and cumulative thresholds on the left and right sides;

[0009] In the left part of the numerical sequence, the values ​​are sequentially accumulated from the first segment towards the end. The process stops when the accumulated value is not less than the left cumulative threshold for the first time, and the target tower corresponding to this point is determined as the left end positioning result.

[0010] In the right part of the segment numerical sequence, the values ​​are accumulated in reverse order from the end segment to the beginning. The accumulation stops when the accumulated value is not less than the right-side cumulative threshold for the first time, and the target tower corresponding to this point is determined as the right-side positioning result.

[0011] Calculate the sum of all values ​​in the numerical sequence of the segment;

[0012] The fault range is determined and output based on the left-side location results, the right-side location results, and the sum.

[0013] Furthermore, in the sequential accumulation step, the left-to-right cumulative sequence is calculated. and with the left threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the result of leftward positioning.

[0014] Furthermore, the left-to-right cumulative sequence is calculated. The steps include: initializing the left-hand accumulator. The following formula is applied sequentially for k=1 to n to calculate the left-hand cumulative value, which is expressed as: ,in, This represents the cumulative value accumulated from left to right up to the k-th segment;

[0015] Based on cumulative value Determine the left threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

[0016] Furthermore, in the reverse accumulation step, the right-to-right cumulative sequence is calculated. and the right threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the result of right-directed positioning.

[0017] Furthermore, the right-to-right cumulative sequence is calculated. The steps include: initializing the right-hand accumulator. The rightward cumulative value is calculated by sequentially applying the following formula to k=n to 1, and is expressed as: ,in, This represents the cumulative value accumulated from right to left up to the k-th segment;

[0018] Based on cumulative value Determine the right threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

[0019] Furthermore, the segment value refers to the distance or electrical length between adjacent towers.

[0020] According to another embodiment of the present invention, a fault location device for transmission lines is provided, comprising the following modules:

[0021] The data interface module is used to acquire fault location-related data for transmission lines, including tower sequence, numerical sequence of each adjacent tower section, and cumulative threshold on the left and right sides;

[0022] The left-side processing module is used to sequentially accumulate values ​​from the first segment towards the end in the left part of the numerical sequence. It stops when the accumulated value is not less than the left-side cumulative threshold for the first time, and determines the target tower corresponding to this time as the left-side positioning result.

[0023] The right-hand processing module is used to perform reverse accumulation from the end segment value to the beginning in the right part of the segment value sequence. When the accumulated value is not less than the right-hand cumulative threshold for the first time, it stops and determines the target tower corresponding to this time as the right-hand positioning result.

[0024] The calculation module is used to calculate the sum of all values ​​in the numerical sequence of the segment;

[0025] The results output module is used to determine and output the fault range based on the left-side positioning results, the right-side positioning results, and the sum.

[0026] According to another embodiment of the present invention, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the fault location method for power transmission lines as provided in the above embodiments.

[0027] According to another embodiment of the present invention, a computer-readable storage medium having a computer program stored thereon is characterized in that, when the computer program is executed by a processor, it implements the fault location method for power transmission lines provided in the above embodiments.

[0028] Compared with the prior art, the advantages of the fault location method and device for transmission lines of the present invention are:

[0029] This invention constructs a left-to-right cumulative sequence and a right-to-left cumulative sequence by accumulating numerical values ​​from each segment of a power line, given left and right thresholds. The index of the segment that first meets the requirements is selected, and the corresponding tower number is used as the location result. Simultaneously, the total numerical value of the entire line is calculated to quickly determine the faulty or target area. This location method significantly improves efficiency, eliminating the need for manual tower-by-tower inspection and quickly pinpointing fault-related towers that first reach the left / right threshold. It solves the problem of time-consuming fault location on long-distance, complex terrain lines, offering advantages such as high speed, high accuracy, and low cost, effectively supporting rapid power restoration at power stations. Attached Figure Description

[0030] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0031] In the attached diagram:

[0032] Figure 1 This is a flowchart illustrating the implementation of the fault location method for power transmission lines provided in an embodiment of the present invention.

[0033] Figure 2 This is a structural block diagram of a fault location device for power transmission lines provided in an embodiment of the present invention;

[0034] Figure 3 This invention provides a structural block diagram of an electronic device. Detailed Implementation

[0035] The technical solutions of this application 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 this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] This invention constructs a left-to-right cumulative sequence and a right-to-left cumulative sequence by accumulating numerical values ​​from each segment of a power line, given left and right thresholds. The index of the segment that first meets the requirements is selected, and the corresponding tower number is used as the location result. Simultaneously, the total numerical value of the entire line is calculated to quickly determine the faulty or target area. This location method significantly improves efficiency, eliminating the need for manual tower-by-tower inspection and quickly pinpointing fault-related towers that first reach the left / right threshold. It solves the problem of time-consuming fault location on long-distance, complex terrain lines, offering advantages such as high speed, high accuracy, and low cost, effectively supporting rapid power restoration at power stations.

[0038] This invention provides a fault location method for transmission lines, executed via pre-built Excel macro functions or plug-in tools. First, it acquires fault distance data for the transmission line. Second, it processes the fault data to obtain the tower and coordinate information for fault location. Finally, it calibrates the fault distance through coordinated efforts at both ends of the line. This invention integrates Excel data processing and GPS positioning, improving the efficiency of rapid fault location for transmission lines while ensuring high positioning accuracy. The result output step includes highlighting or marking the tower number cells corresponding to the left and right positioning results in the worksheet.

[0039] In the data preparation process, this invention acquires fault location data of transmission lines and processes the fault location data to obtain fault tower and GPS positioning information; collects distance and positioning-related parameters of several towers (cable joints) on the transmission line; models the distance and positioning-related data of multiple towers (cable joints); and constructs a mapping function between parameters and fault distance.

[0040] The implementation of this application will be described in detail below with reference to specific embodiments.

[0041] Please refer to Figure 1 According to one embodiment of this application, a fault location method for transmission lines is provided, comprising the following steps:

[0042] Step S1: Obtain fault location data for the transmission line, including tower sequence, numerical sequence of each adjacent tower section, and cumulative threshold on the left and right sides;

[0043] The tower sequence of this invention is used to characterize a set of towers on a transmission line numbered in the actual physical arrangement order, each number... Each adjacent tower segment corresponds uniquely; in the numerical sequence of each adjacent tower segment in this invention, the segment value is the distance or electrical length between adjacent towers.

[0044] Furthermore, the left and right cumulative thresholds in this embodiment of the invention are the critical values ​​for fault interval determination, and the left cumulative threshold... This is the threshold for the first triggering of a fault-associated tower when accumulating from the left end (first end) to the end of the line; the right-side accumulated threshold... This is the critical value accumulated from the right end (terminal) of the line towards the beginning. This threshold is not fixed and needs to be dynamically generated based on data, such as fault distance estimates from fault location equipment, historical line maintenance data, and terrain complexity coefficients. Furthermore, the threshold constraint is expressed as follows: ,in, This indicates the total length of the entire line, avoiding invalid results due to the threshold exceeding the total line length; the invention can also set an adaptive threshold adjustment, based on... Automatically verify threshold range.

[0045] This invention addresses a line consisting of multiple towers. Given the values ​​of adjacent tower sections (such as distance, electrical length, etc.), and two thresholds (left and right), the data is accumulated from the left and right ends of the line to find the tower position corresponding to the first accumulated value reaching or exceeding the threshold, and the total accumulated value for the entire line is given.

[0046] For details, please continue to refer to... Figure 1 The fault location method for transmission lines of the present invention further includes the following steps:

[0047] Step S2: In the left part of the numerical sequence, start from the first segment value and accumulate sequentially towards the end. Stop when the accumulated value is not less than the left cumulative threshold for the first time, and determine the target tower corresponding to this time as the left end positioning result;

[0048] In step S2 of the present invention, during the sequential accumulation step, the left-wise cumulative sequence is calculated. and with the left threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the leftward positioning result; further, the present invention calculates the leftward cumulative sequence. The steps include: initializing the left-hand accumulator. The following formula is applied sequentially for k=1 to n to calculate the left-hand cumulative value, which is expressed as: ,in, This represents the cumulative value accumulated from left to right up to the k-th segment; based on the cumulative value Determine the left threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

[0049] The present invention The middle character indicates the number accumulated from the beginning (left) to the end (right) up to the [number]. The cumulative value of each section is used to calculate the tower and GPS positioning information corresponding to the fault distance from the beginning (left) to the end (right) of the line.

[0050] Please continue to refer to Figure 1 The fault location method for transmission lines of the present invention further includes the following steps:

[0051] Step S3: In the right part of the segment value sequence, start from the end segment value and accumulate in reverse order towards the beginning. Stop when the accumulated value is not less than the right accumulated threshold for the first time, and determine the target tower corresponding to this time as the right end positioning result;

[0052] In step S3 of the present invention, in the reverse accumulation step, the right-directed cumulative sequence is calculated. and the right threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the result of right-directed positioning.

[0053] This invention calculates the right-wise cumulative sequence. The steps include: initializing the right-hand accumulator. The rightward cumulative value is calculated by sequentially applying the following formula to k=n to 1, and is expressed as: ,in, This represents the cumulative value accumulated from right to left up to the k-th segment; based on the cumulative value Determine the right threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

[0054] The present invention The middle character indicates the number accumulated from the end (right) to the beginning (left) up to the [number]. The cumulative value of each section is used to calculate the tower and GPS positioning information corresponding to the fault distance from the end (right) to the beginning (left) of the line.

[0055] Please continue to refer to Figure 1 The fault location method for transmission lines of the present invention further includes the following steps:

[0056] Step S4: Calculate the sum of all values ​​in the segment's numerical sequence;

[0057] The total sum of all aspects of this invention is expressed as follows:

[0058]

[0059] In the formula, n represents the number of line segments. This represents the value of the j-th segment.

[0060] Please continue to refer to Figure 1 The fault location method for transmission lines of the present invention further includes the following steps:

[0061] Step S5: Determine and output the fault range based on the left-direction positioning results, the right-direction positioning results, and the sum; This invention uses the left-direction cumulative sequence and the right-direction cumulative sequence to generate tables or curves in Excel macro functions or plug-in tools.

[0062] Please refer to Figure 2According to another embodiment of the present invention, a fault location device for transmission lines is provided, comprising the following modules:

[0063] Data interface module 11 is used to acquire fault location related data of transmission lines, including tower sequence, numerical sequence of each adjacent tower section and cumulative threshold on the left and right sides;

[0064] The left-side processing module 12 is used to sequentially accumulate values ​​from the first segment to the end in the left part of the numerical sequence. It stops when the accumulated value is not less than the left-side cumulative threshold for the first time, and determines the target tower corresponding to this time as the left-side positioning result.

[0065] The right-side processing module 13 is used to perform reverse accumulation from the end segment value to the beginning value in the right part of the segment value sequence. When the accumulated value is not less than the right-side cumulative threshold for the first time, it stops and determines the target tower corresponding to this time as the right-side positioning result.

[0066] Calculation module 14 is used to calculate the sum of all values ​​in the segment value sequence;

[0067] The result output module 15 is used to determine and output the fault range based on the left-side positioning result, the right-side positioning result, and the sum.

[0068] Please refer to Figure 3 According to another embodiment of the present invention, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the fault location method for power transmission lines as provided in the above embodiments.

[0069] According to another embodiment of the present invention, a computer-readable storage medium having a computer program stored thereon is characterized in that, when the computer program is executed by a processor, it implements the fault location method for power transmission lines provided in the above embodiments.

[0070] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0071] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0072] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0073] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0074] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0075] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory, random access memory, portable hard drives, magnetic disks, or optical disks.

[0076] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A fault location method for transmission lines, characterized in that, Includes the following steps: Acquire fault location data for transmission lines, including tower sequence, numerical sequence of adjacent tower sections, and cumulative thresholds on the left and right sides; In the left part of the numerical sequence, the values ​​are sequentially accumulated from the first segment towards the end. The process stops when the accumulated value is not less than the left cumulative threshold for the first time, and the target tower corresponding to this point is determined as the left end positioning result. In the right part of the segment numerical sequence, the values ​​are accumulated in reverse order from the end segment to the beginning. The accumulation stops when the accumulated value is not less than the right-side cumulative threshold for the first time, and the target tower corresponding to this point is determined as the right-side positioning result. Calculate the sum of all values ​​in the numerical sequence of the segment; The fault range is determined and output based on the left-side location results, the right-side location results, and the sum.

2. The fault location method for transmission lines according to claim 1, characterized in that, In the sequential accumulation step, the left-to-right cumulative sequence is calculated. and with the left threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the result of leftward positioning.

3. The fault location method for transmission lines according to claim 2, characterized in that, Calculate the left-to-right cumulative sequence The steps include: initializing the left-hand accumulator. The following formula is applied sequentially for k=1 to n to calculate the left-hand cumulative value, which is expressed as: ,in, This represents the cumulative value accumulated from left to right up to the k-th segment; Based on cumulative value Determine the left threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

4. The fault location method for transmission lines according to claim 3, characterized in that, In the reverse accumulation step, the right-to-right cumulative sequence is calculated. and the right threshold Comparison, and determination of the first satisfaction based on the comparison results. index The corresponding tower This is the result of right-directed positioning.

5. The fault location method for transmission lines according to claim 4, characterized in that, Calculate the right-to-right cumulative sequence The steps include: initializing the right-hand accumulator. The rightward cumulative value is calculated by sequentially applying the following formula to k=n to 1, and is expressed as: ,in, This represents the cumulative value accumulated from right to left up to the k-th segment; Based on cumulative value Determine the right threshold hit location , If there is no k that satisfies the condition, it is marked as not reaching the threshold.

6. The fault location method for transmission lines according to claim 5, characterized in that, The segment value refers to the distance or electrical length between adjacent towers.

7. An apparatus for implementing the fault location method for transmission lines as described in any one of claims 1 to 6, characterized in that, Includes the following modules: The data interface module is used to acquire fault location-related data for transmission lines, including tower sequence, numerical sequence of each adjacent tower section, and cumulative threshold on the left and right sides; The left-side processing module is used to sequentially accumulate values ​​from the first segment to the end in the left part of the numerical sequence. It stops when the accumulated value is not less than the left-side cumulative threshold for the first time, and determines the target tower corresponding to this time as the left-side positioning result. The right-hand processing module is used to perform reverse accumulation from the end segment value towards the beginning in the right part of the segment value sequence. When the accumulated value is not less than the right-hand cumulative threshold for the first time, it stops and determines the target tower corresponding to this time as the right-hand positioning result. The calculation module is used to calculate the sum of all values ​​in the numerical sequence of the segment; The results output module is used to determine and output the fault range based on the left-side positioning results, the right-side positioning results, and the sum.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the fault location method for transmission lines as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the fault location method for transmission lines as described in any one of claims 1 to 6.

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