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Comprehensive positioning method and system for power grid fault lines

A power grid fault and location method technology, applied in the electrical field, can solve the problem of low fault location accuracy

Active Publication Date: 2018-11-02
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to address the problem of low fault location accuracy and provide a comprehensive fault location method and system for improving fault location accuracy.

Method used

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  • Comprehensive positioning method and system for power grid fault lines
  • Comprehensive positioning method and system for power grid fault lines
  • Comprehensive positioning method and system for power grid fault lines

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0024] see figure 1 , providing an embodiment of a power grid fault line comprehensive positioning method, including the following steps:

[0025] S100: Obtain an initial set of multiple grid fault line segments.

[0026] After the power grid fails, determining the fault location as soon as possible plays a decisive role in shortening the repair time of the fault. There are many methods for locating the fault of the power grid, including a variety of positioning methods for locating the fault line segment, that is, when the power grid fails, determine Segments where failures may occur. Corresponding positioning results can be obtained through each fault location method, and various initial sets of grid fault line segments can be obtained. The initial set of grid fault line segments refers to the set of faulty line segments when the grid is faulty. Coincident line segments may also have different fault line segments.

[0027] S200: Weighting the fault line segments in the in...

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Abstract

The invention relates to a method and system for the comprehensive positioning of a fault line of a power grid, and the method comprises the steps: firstly carrying out the weighted processing of various types of fault lines; secondly carrying out the combination of all fault line sets after weighting; thirdly carrying out the accumulation of the weights of coincided lines of all fault line sets, so as to update the weights of the coincided lines and to obtain a comprehensive fault weighted line set. The method carries out the comprehensive analysis of various types of fault lines, not just the analysis of a single fault line set. The more times a line appears in various fault line sets, the weight of the line may be larger (indicating that the line can be positioned when a plurality of positioning methods are used for fault positioning), thereby indicating that the possibility that the line is a fault line is higher. The higher weight of a line in the comprehensive fault weighted line set indicates that the higher possibility that the line is a fault line of the power grid. The line with the higher weight is selected from the comprehensive fault weighted line set as the fault line set of the power grid, thereby obtaining higher-precision fault positioning result of the power grid.

Description

technical field [0001] The invention relates to the electrical field, in particular to a method and system for comprehensively locating a grid fault line segment. Background technique [0002] Electricity is the foundation of the national economy and is crucial to the development of a country. Therefore, ensuring the safe and effective operation of the power system has become a top priority. Modern distribution networks have the characteristics of complex topological relationships, large number of nodes, and denseness. In actual During operation, failures will inevitably occur due to external damage, extreme weather, and equipment aging. After a fault occurs, determining the fault location as soon as possible plays a decisive role in saving the time for repairing the fault. At present, the commonly used fault location methods in the power grid include impedance method, traveling wave method, fault indicator location, automatic switch location and outlet switch location. Am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 邢立坤曾庆辉李国伟吴沃生李新吴树鸿罗容波
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID