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T-connection line fault positioning method and system considering traveling wave velocity

A fault location and line connection technology, applied in the fault location, fault detection according to conductor type, measurement device, etc., can solve the problems affecting the fault location accuracy, etc.

Pending Publication Date: 2020-07-07
ANHUI ELECTRIC POWER FUYANG POWER SUPPLY +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, presetting a value close to the speed of light as the traveling wave velocity for positioning calculation will greatly affect the fault location accuracy

Method used

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  • T-connection line fault positioning method and system considering traveling wave velocity
  • T-connection line fault positioning method and system considering traveling wave velocity
  • T-connection line fault positioning method and system considering traveling wave velocity

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Embodiment Construction

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0032] It should also be understood that the terminology used in th...

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Abstract

The invention discloses a T-connection line fault positioning method and system considering traveling wave velocity. The method comprises the steps: monitoring a detected power transmission line, uploading the signal information obtained through monitoring to a data acquisition card, enabling the data acquisition card to carry out A / D conversion on the acquired signal information and then synchronously transmitting the signal information to a main control computer; enabling the main control computer to store sampling information; carrying out phase-mode transformation processing on the signalinformation; determining the moment when the fault initial wave arrives at the measurement point; constructing a fault branch judgment matrix to find out a fault branch; calculating the traveling wavevelocity according to characteristics of a T-connection line, and calculating the position of a fault point by combining the traveling wave velocity with a double-end traveling wave distance measurement method principle. According to the method, the two parts are not influenced by the wave velocity of the traveling wave, the influence of the wave velocity of the traveling wave on fault positioning is eliminated, and meanwhile, the positioning precision is not influenced by the fault type and the transition resistance.

Description

technical field [0001] The invention relates to the technical field of transmission line fault diagnosis, in particular to a T-connection line fault location method and system considering traveling wave velocity. Background technique [0002] With the development of the power system, T-junction lines have increasingly appeared in the power system. T-connection lines have the characteristics of large power transmission and heavy loads. Once the line fails, it may cause large-scale power outages and cause adverse social impacts. Therefore, fast and accurate fault location is particularly important for T-connection lines. [0003] The fault location of the T-connection line is mainly divided into two parts: the identification of the fault branch and the location of the fault point. The judgment of the fault branch is the premise of accurate fault location. Only by accurately judging the fault branch can the fault point be accurately located. The fault location methods of T-...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 崔超奇刘斌齐国昌董苏安玲程亚航魏存金郭运泽朱杰赵任徐世利邹海曹杰董梦雅朱新菊
Owner ANHUI ELECTRIC POWER FUYANG POWER SUPPLY
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