Insulation state evaluation method for power distribution line

A technology of distribution lines and insulation state, which is applied in the field of power transmission and distribution, can solve the problems of inaccurate insulation state evaluation results and insufficient reliability of evaluation results, and achieve the effect of refining the evaluation area and improving accuracy and reliability

Active Publication Date: 2019-04-09
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a method for evaluating the insulation state of distribution lines to solve the problems in the prior art that the evaluation results of the insulation state of distribution lines are not accurate enough and the reliability of the evaluation results is not high enough

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  • Insulation state evaluation method for power distribution line
  • Insulation state evaluation method for power distribution line

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Embodiment Construction

[0047] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0048] In order to better understand the present application, the implementation manner of the present application will be explained in detail below in conjunction with the accompanying drawings.

[0049] see figure 1 , figure 1 It is a schematic flowchart of the method for evaluating the insulation state of distribution lines provided in...

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Abstract

The invention discloses an insulation state evaluation method for a power distribution line. The method comprises the following steps that: firstly, according to internal, external and non-positioningfault information and a power distribution line operation situation, establishing an insulation state evaluation model for the power distribution line; then, when an insulation fault happens, according to the wave recording data of each monitoring point, determining the value of the insulation state evaluation index of the power distribution line; and finally, according to the value of the insulation state evaluation index of the power distribution line, utilizing the insulation state evaluation model for the power distribution line to evaluate the insulation state of each section of the power distribution line. Through the method, the accuracy and the reliability of insulation state evaluation for the power distribution line can be improved, an alarm signal can be given when the insulation state is lowered to a certain degree, the insulation state of the power distribution line can be obtained in time so as to provide a basis for line state overhauling, and therefore, the reliabilityof the power distribution line is improved.

Description

technical field [0001] The present application relates to the technical field of power transmission and distribution, in particular to a method for evaluating the insulation state of power distribution lines. Background technique [0002] In the field of power transmission and distribution technology, the distribution network usually has a large volume and a wide area, and the failure rate due to the low insulation level remains high. Troubleshooting is very difficult. Therefore, it is very important to establish an insulation state evaluation system for distribution lines to evaluate the insulation state of distribution lines and eliminate potential risks in time. [0003] At present, the insulation state monitoring method using transient transient signals first collects the instantaneous grounding information of the small current line selection device in the substation, and sets that there is only one insulation weak point in the current line, and then, according to the i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 张林利李立生孙勇邵志敏苏建军刘合金樊迪任杰文艳孟海磊金鑫郭雨豪薛永端房牧李建修左新斌张婉婕王鑫刘洋
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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