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A kind of transmission line fault type diagnosis method and system

A technology for transmission lines and fault types, which is applied to fault locations, fault detection by conductor type, and electrical measurement, etc., can solve problems such as failure to timely and accurately determine line fault types and system accidents.

Active Publication Date: 2019-02-12
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

In the actual operation of the power system, serious system accidents are often caused because the failure type of the line cannot be judged in time and accurately.

Method used

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  • A kind of transmission line fault type diagnosis method and system
  • A kind of transmission line fault type diagnosis method and system

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0045] The embodiment of the present invention discloses a transmission line fault type diagnosis method, see figure 1 As shown, the method includes:

[0046] Step S11: Acquire pre-fault wave recording data and post-fault wave recording data at both ends of the transmission line.

[0047] It can be understood that the above-mentioned pre-fault wave recording data refers to the wave recording data at both ends of the transmission line before a fault occurs, an...

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Abstract

The invention discloses a power transmission line fault type diagnosis method and system. The method comprises the following steps: obtaining recording data obtained before fault and recording data obtained after fault of the two ends of a power transmission line; carrying out time domain delay processing on the recording data obtained after fault to obtain delay recording data obtained after fault; calculating cross-correlation coefficients between the recording data obtained before fault and the delay recording data obtained after fault by utilizing a generalized cross-correlation function; and determining the fault type of the power transmission line by utilizing the cross-correlation coefficients. The method is characterized by, to begin with, obtaining the recording data obtained before fault and the recording data obtained after fault of the two ends of the power transmission line, and then, after carrying out time domain delay processing on the recording data obtained after fault, determining the fault type of the power transmission line by utilizing the cross-correlation coefficients between the recording data obtained before fault and the delay recording data obtained after fault, so that the purpose of diagnosis of the fault type of the power transmission line is realized.

Description

technical field [0001] The invention relates to the technical field of transmission line fault diagnosis, in particular to a transmission line fault type diagnosis method and system. Background technique [0002] High-voltage overhead transmission lines are an important part of the power system, but because overhead lines are exposed to the air, they are easily affected by factors such as the environment and weather, and various types of faults occur. These faults can be divided into two types of faults, instantaneous permanent failure and permanent failure. In the actual operation of the power system, serious system accidents are often caused because the fault type of the line cannot be judged in time and accurately. How to diagnose the fault type of the transmission line is a problem to be solved at present. Contents of the invention [0003] In view of this, the object of the present invention is to provide a method and system for diagnosing fault types of transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 吴昊王红斌全玉生张英周恩泽黄勇罗颖婷房林杰师普辛叶海峰
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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