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Method and system for analyzing fault cause of distribution network line

A technology for line faults and fault causes, applied in fault locations, fault detection by conductor type, and electrical measurement, etc., can solve problems such as incompleteness, high work experience requirements for judging personnel, and lack of scientific quantitative basis.

Pending Publication Date: 2019-04-19
CHINA ELECTRIC POWER RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high requirements for the work experience of the judgment personnel, and completely relies on subjective judgment, lacking scientific and quantitative basis
In addition, human judgment affects the timeliness of troubleshooting. At the same time, because the fault-related information received by the staff in a short period of time is often incomplete, making judgments based on this will affect the accuracy of the analysis conclusion

Method used

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  • Method and system for analyzing fault cause of distribution network line
  • Method and system for analyzing fault cause of distribution network line
  • Method and system for analyzing fault cause of distribution network line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] like figure 1 A method for analyzing the cause of a distribution network line fault is shown, and the steps are as follows:

[0061] Step 1: Get the data when the current line fails

[0062] Step 2: Based on the obtained data at the time of the current line failure and the pre-built analysis model of the category of the cause of the failure, determine the category of the cause of the failure;

[0063] Step 3: Determine the cause of the line fault based on the major categories of fault causes and the pre-built analysis models for small categories of fault causes.

[0064] The above steps are explained in detail below:

[0065] Explanation for Step 2

[0066] To distinguish between overhead line faults and cable faults, if it is an overhead line fault, enter the analysis model of the general category of overhead line fault causes; if it is a cable fault, enter the analysis model of the general category of cable line fault causes.

[0067] Distinguish which quarter the...

Embodiment 2

[0073] against Figure 7 The shown examples specifically illustrate the method of the present invention.

[0074] The present invention first establishes the distribution network multi-level failure cause analysis model library:

[0075] Since different distribution line types (overhead lines or cables) have different influencing factors and proportions of failures in different seasons, and the causes of failures include foreign objects, tree lines, traffic, etc., in addition to force, users, and nature. Small categories such as vehicles, bird damage, lightning strikes, heavy rain, and strong winds. In order to achieve a more accurate and detailed fault cause analysis, it is necessary to refine and establish different fault cause analysis models for different distribution line types and in different seasons, and comprehensively form a distribution network multi-level line fault cause analysis model library. The multi-level structure of the model library is shown in the follo...

Embodiment 3

[0116] The present invention also relates to a system for analyzing the cause of a distribution network line fault, including:

[0117] Obtaining module: used to obtain data when the current line is faulty;

[0118] Fault cause category determination module: used to determine the category of fault causes based on the acquired data of the current line failure and the pre-built fault cause category analysis model;

[0119] Fault cause determination module: used to determine the cause of line faults based on the category of fault causes and the pre-built analysis model of small fault cause categories;

[0120] The failure cause category determination module includes a failure cause category analysis model building unit;

[0121] The failure cause category analysis model construction unit is used to determine the input and output of the failure cause category analysis model based on the historical data of failure, wherein the historical data includes training data and test data; ...

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Abstract

The invention relates to a method and system for analyzing the fault cause of a distribution network line. The method comprises the steps of obtaining data when a current line fails, and determining afault cause type based on the obtained data when the current line fails and a pre-built fault cause type analysis model; based on the fault cause type and a pre-built fault cause small type analysismodel, determining the cause of a line fault. The invention relates to the method and system for analyzing the fault cause of the distribution network line, the fault cause type is determined based onthe obtained data when the current line fails and the pre-built fault cause type analysis model, based on the fault cause type and the pre-built fault cause small type analysis model, the cause of the line fault is determined, the problem of human judgement affecting the timeliness of fault handling is solved, information related to the fault received by staff in a short time is often not comprehensive, a judgment is made according to the information, and the problem that the accuracy of analysis conclusions is affected is solved.

Description

technical field [0001] The invention belongs to the field of electric power system and its automation, and in particular relates to a method and system for analyzing the cause of a distribution network line fault. Background technique [0002] Distribution circuit (English: distribution circuit) refers to the line that sends power from the step-down substation to the distribution transformer or sends the power from the distribution substation to the power unit. [0003] The distribution line voltage is 3.6kV ~ 40.5kV, called high-voltage distribution lines; the distribution voltage does not exceed 1kV, the frequency does not exceed 1000Hz, and the DC does not exceed 1500V, it is called low-voltage distribution lines. The construction of distribution lines requires safety and reliability, maintaining continuity of power supply, reducing line losses, improving transmission efficiency, and ensuring good power quality. [0004] Distribution network line fault is the most import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 李雅洁宋晓辉盛万兴孟晓丽李建芳张瑜高菲赵珊珊常松
Owner CHINA ELECTRIC POWER RES INST
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