Line lightning strike fault pole selection method for two-end bipolar high voltage direct current transmission

A technology for high-voltage direct current transmission and direct current transmission lines, which is applied to emergency protection circuit devices, electrical components, etc., can solve problems such as no verification of operating characteristics, and achieve the effect of saving communication time, reducing the amount of calculation, and avoiding communication errors.

Inactive Publication Date: 2018-04-24
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing fault pole selection criteria constructed using low-frequency components of DC current

Method used

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  • Line lightning strike fault pole selection method for two-end bipolar high voltage direct current transmission
  • Line lightning strike fault pole selection method for two-end bipolar high voltage direct current transmission
  • Line lightning strike fault pole selection method for two-end bipolar high voltage direct current transmission

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] It should be pointed out that the following detailed description is exemplary and is 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.

[0043] 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 combina...

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Abstract

The invention discloses a line lightning strike fault pole selection method for two-end bipolar high voltage direct current transmission. The method is characterized by comprising the steps of (1) calculating the integral value of each voltage jump amount of positive electrode and negative electrode direct current power transmission line rectifier sides at a given data window length and calculating an absolute value corresponding to the integral value, (2) calculating an average value of the absolute values, substituting the average value into an algorithm starting criterion, starting an algorithm and going to step (3) if the starting criterion is satisfied, otherwise not starting the algorithm, and returning an initial state, and (3) calculating a ratio of a positive electrode absolute value to a negative electrode absolute value in step (1), substituting the ratio into a single end pole selection criterion of direct current line lightning fault, and thus judging whether the fault occurs. The method has the advantages of a small calculation amount and a simple and reliable algorithm, the communication time is saved, a possible communication error of a double-end criterion is avoided, and the method has an engineering practical significance.

Description

technical field [0001] The invention relates to the technical field of power system control and protection, in particular to a pole selection method for DC line lightning strike faults suitable for bipolar high-voltage direct current transmission at both ends. Background technique [0002] The DC side wiring of the dual-pole neutral-point grounded DC transmission project at both ends is composed of two single-pole ground return lines that can operate independently. This wiring method has good flexibility and high reliability, and is adopted by most direct current transmission projects. The two-pole lines of the two-terminal bipolar DC transmission system run in parallel, and there is electromagnetic coupling. When one pole line fails, a large voltage and current change rate may be induced on the healthy pole line, resulting in misoperation of the healthy pole line protection, resulting in When a single-pole fault occurs, the bipolar outage will affect the safe and stable op...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/268H02H7/267
Inventor 邢鲁华张鹏飞王飞赵光锋王亮牟旭涛蒋哲杨冬麻常辉张丹丹李文博张磊赵光辉陈博刘文学赵康
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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