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Traveling wave fault detection and locating method under IEC61850 standard

A technology of traveling wave fault and positioning method, which is applied in the direction of fault location, fault detection according to conductor type, and electrical measurement, which can solve the problem of high time accuracy and achieve high safety and reliability, accurate fault location, and high detection efficiency Effect

Inactive Publication Date: 2017-03-08
STATE GRID CORP OF CHINA +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fault location method based on a single line requires high time accuracy. In harsh environments, the location error may reach 150 meters

Method used

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  • Traveling wave fault detection and locating method under IEC61850 standard
  • Traveling wave fault detection and locating method under IEC61850 standard
  • Traveling wave fault detection and locating method under IEC61850 standard

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Embodiment Construction

[0043] Such as figure 1 As shown, the implementation steps of the traveling wave fault detection and location method under the IEC61850 standard in this embodiment include:

[0044] 1) Build a traveling wave fault location system model under the IEC61850 standard;

[0045] 2) collecting traveling wave signals through the traveling wave fault location system model;

[0046] 3) Preprocessing the traveling wave signal;

[0047] 4) Perform wavelet transform on the signal obtained after preprocessing to obtain the modulus maximum value, and find out the position of the singular point;

[0048] 5) After obtaining the position of the singularity point, calculate the fault distance through the positions of two peak pulses with opposite polarities in the waveform.

[0049]The traveling wave fault detection and location method under the IEC61850 standard in this embodiment constructs the traveling wave fault location system model under the IEC61850 standard, collects the traveling wa...

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Abstract

The invention discloses a traveling wave fault detection and locating method under the IEC61850 standard. The implementation process of the method includes the following steps that: 1) a traveling wave fault locating system model under the IEC 61850 standard is constructed; 2) traveling wave signals are collected through the traveling wave fault locating system model; 3) the traveling wave signals are pre-processed; 4) wavelet transformation is performed on signals obtained after pre-processing, so that modulus maxima can be obtained, and locations where singular points are located are found out; and 5) after the locations of the singular points are obtained, a fault distance is calculated through the locations of spike pulses of which the polarities are opposite in waveforms. The traveling wave fault detection and locating method under the IEC61850 standard of the invention has the advantages of accurate and reliable alternating-current and direct-current fault locating, high safety, high reliability and excellent expandability.

Description

technical field [0001] The invention relates to a traveling wave fault detection and positioning technology of an intelligent substation in a power system, in particular to a traveling wave fault detection and positioning method under the IEC61850 standard. Background technique [0002] The scale of modern power systems is getting bigger and bigger, the voltage level of transmission lines is getting higher and higher, the length is getting longer and longer, and the environment in which transmission lines are located is also more complex, so the possibility and frequency of failures are also inevitably greatly increased. . For this problem, traveling wave ranging is the most effective solution. The key technical point of the traveling wave ranging algorithm is to accurately detect the wave head time point of the traveling wave. Compared with the impedance method, this algorithm is less susceptible to the influence of system transition resistance, line short circuit type, l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 彭熹梁勇超潘飞来李龙谢培元崔卓侯备刘烁李俊堂
Owner STATE GRID CORP OF CHINA
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