Method and device for quickly identifying lightning interference for flexible direct-current power transmission lines

A transmission line, flexible direct current technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of difficulty in meeting the rapidity requirements of flexible direct current transmission lines, large calculation amount, long data window, etc., and achieve rapid judgment Lightning strike interference, satisfying the effect of rapidity

Active Publication Date: 2017-05-31
TSINGHUA UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current lightning interference identification algorithm requires a long data window and a large amount of calculation, which is difficult to meet the rapidity requirements of the flexible DC transmission line for relay protection.

Method used

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  • Method and device for quickly identifying lightning interference for flexible direct-current power transmission lines
  • Method and device for quickly identifying lightning interference for flexible direct-current power transmission lines
  • Method and device for quickly identifying lightning interference for flexible direct-current power transmission lines

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Embodiment Construction

[0054] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, 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.

[0055] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.

[0056] figure 1 A schematic flowchart of a method for quickly identifying lightning strike disturbances on flexible direct current transmission lines according to an embodiment of the present invention is shown.

[0057] Such as figure ...

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Abstract

The invention provides a method and a device for quickly identifying lightning interference for flexible direct-current power transmission lines. The method includes structuring pole-mode reverse voltage fault transient state traveling waves of the flexible direct-current power transmission lines and equivalent pole-mode reverse voltage traveling waves of the pole-mode reverse voltage fault transient state traveling waves; preliminarily judging whether the lightning interference possibly occurs or not according to the number of non-zero values of the equivalent pole-mode reverse voltage traveling waves; fitting wave tails of the pole-mode reverse voltage fault transient state traveling waves when the fact that the lightning interference possibly occurs is preliminarily determined, and judging whether the lightning interference occurs or not. According to the technical scheme, the method and the device have the advantages that the lightning interference identification speeds can be effectively increased for the flexible direct-current power transmission lines, and accordingly the reliability of ultrahigh-speed flexible direct-current power transmission line protection can be greatly improved.

Description

technical field [0001] The invention relates to power system relay protection and fault detection technology, in particular to a method for quickly identifying lightning strike interference on a flexible direct current transmission line and a rapid identification device for lightning strike interference on a flexible direct current transmission line. Background technique [0002] Flexible DC transmission technology has the advantages of low harmonic level, no commutation failure problem, no reactive power compensation problem, can supply power for passive systems, and can independently adjust active power and reactive power at the same time, and has broad application prospects in my country. When a short-circuit fault occurs on the flexible DC transmission line, in order to protect the power electronic devices of the converter station, the relay protection needs to correctly identify the fault in a very short time after the fault occurs, and control the DC circuit breaker to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 董新洲汤兰西王宾施慎行贺之渊庞辉孔明吴亚楠裴翔羽
Owner TSINGHUA UNIV
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