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T-type transmission line fault location method based on distance measurement function phase characteristics

A transmission line and fault location technology, applied in the direction of fault location, measurement of electricity, measurement of electrical variables, etc., can solve problems such as lack of solutions, failure to correctly identify fault branches, and identify dead zones

Inactive Publication Date: 2018-08-03
BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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Problems solved by technology

However, the traditional fault location method usually has the problem of identifying the dead zone when a high-impedance fault occurs near the T node, and cannot correctly identify the fault branch.
[0004] To sum up, in the prior art, there is still no effective solution to the problem of fast and accurate fault location of T-shaped transmission lines

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  • T-type transmission line fault location method based on distance measurement function phase characteristics
  • T-type transmission line fault location method based on distance measurement function phase characteristics
  • T-type transmission line fault location method based on distance measurement function phase characteristics

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[0052] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0053] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0054] As introduced in the background technology, the traditional fault location method in the prior art usuall...

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Abstract

The present invention discloses a T-type transmission line fault location method based on distance measurement function phase characteristics. The method comprises the steps of: obtaining voltage andcurrent fault data of each end of a fault line, performing pre-processing of the voltage and current fault data, and obtaining voltage and current positive-sequence components of each end of the faultline; based on the voltage and current positive-sequence components of each end of the fault line, constructing one distance measurement function of each branch; and determining fault branches and fault points on the fault branches through the phase of the distance measurement function of each branch. The T-type transmission line fault location method based on distance measurement function phasecharacteristics employs the characteristic that phase zero crossing points of the distance measurement functions to perform location of fault points when selected reference points are matched with thefault points on the fault branches with no need for determination of types of faults in advance, and has good applicability for non-linear resistance faults and various types of faults, can overcomethe problem that there are distance measurement dead areas near T nodes in a traditional method.

Description

technical field [0001] The invention relates to the technical field of power grid fault diagnosis, in particular to a T-shaped transmission line fault location method based on the phase characteristic of a ranging function. Background technique [0002] High-voltage transmission lines are an important part of the power system. They not only undertake the important task of transmitting electric energy, but also undertake the interconnection of various regional power grids. Their safety and stability are crucial. However, due to the long transmission distance of high-voltage transmission lines and the characteristics that they are mostly erected in the wild and in mountainous areas, they are extremely vulnerable to natural disasters such as strong winds, icing, and lightning, which may cause line failures. For long-distance transmission lines, there are many difficulties in fault inspection. Therefore, it is very important to study fast and accurate fault location methods for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 杨洪波董寿菲李伟伟胡耀聪杜明田赵泉刚薛莉张海城王波伊瑞鹏杜洪燕巩秀萍李翔代桃桃
Owner BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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