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Processing method and device for transmission line fault traveling wave

A transmission line and fault traveling wave technology, applied in the field of power systems, can solve the problems of inaccurate detection of transmission line faults, difficult to effectively highlight the characteristics of the fault traveling wave process, and difficulty in fully in-depth research on fault traveling waves, etc., to achieve Fault transient traveling waves are rich, features are concise, characteristic and intuitive effects

Active Publication Date: 2018-06-15
TSINGHUA UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional relay protection technology based on power frequency electrical quantities is easily affected by factors such as transmission line distributed capacitance, transition resistance, system oscillation, and current transformer saturation, and cannot accurately detect transmission line faults.
[0003] Moreover, the current analysis methods for fault traveling waves mainly focus on the wave head of a single fault traveling wave, and lack of in-depth analysis of the characteristics of the entire wave process.
Moreover, in the AC system, the characteristics of the wave process of the fault traveling wave are difficult to be highlighted concisely and effectively, and it is difficult to fully study the characteristics of the fault traveling wave

Method used

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  • Processing method and device for transmission line fault traveling wave
  • Processing method and device for transmission line fault traveling wave
  • Processing method and device for transmission line fault traveling wave

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Embodiment Construction

[0035] In order to have a clearer understanding of the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0037] figure 1 It shows a schematic flowchart of a method for processing transmission line fault traveling waves according to an embodiment of the present invention.

[0038] Such as figure 1 As sh...

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Abstract

The invention proposes a processing method and a processing device for power transmission line fault traveling waves. The processing method for the power transmission line fault traveling waves comprises the steps of: acquiring three fault transient traveling wave phasors of a power transmission line, and acquiring three fault transient traveling wave moduli of the three fault transient traveling wave phasors; processing each fault transient traveling wave modulus in the three fault transient traveling wave moduli so as to determine a modulus maximum value of each fault transient traveling wave modulus; and extending the modulus maximum value of each fault transient traveling wave modulus on a time line of the corresponding fault transient traveling wave modulus so as to obtain an equivalent traveling wave of the corresponding fault transient traveling wave modulus. By adopting the technical scheme of the invention, features of the wave process of the fault transient traveling waves can be more concise and intuitive, thus the rich features of the fault transient traveling waves can be demonstrated more effectively.

Description

technical field [0001] The invention relates to the technical field of electric power systems, in particular to a method for processing transmission line fault traveling waves and a processing device for transmission line fault traveling waves. Background technique [0002] At present, with the improvement of the voltage level of the transmission line and the increase of the transmission distance, especially the rapid development of the ultra-high voltage and ultra-high voltage transmission lines, new challenges are brought to the relay protection technology and fault location technology. The traditional relay protection technology based on power frequency electrical quantities is easily affected by factors such as transmission line distributed capacitance, transition resistance, system oscillation, and current transformer saturation, and cannot accurately detect transmission line faults. [0003] Moreover, the current analysis methods for fault traveling waves mainly focus ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/08
Inventor 董新洲任立汤兰西罗澍忻唐志军黄巍林国栋
Owner TSINGHUA UNIV
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