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Method and system for determining faulty line based on station domain information

A fault line, fault determination technology, applied in fault location, fault detection by conductor type, direction of current indication, etc.

Active Publication Date: 2020-04-17
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a method and system for determining faulty lines based on station domain information to solve the problem of how to accurately determine faulty lines

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  • Method and system for determining faulty line based on station domain information
  • Method and system for determining faulty line based on station domain information
  • Method and system for determining faulty line based on station domain information

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Embodiment Construction

[0045] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0046] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention discloses a method and a system for determining a fault line based on station domain information. The method comprises the following steps: respectively calculating zero-sequence current, negative-sequence current and zero-sequence voltage of two lines according to acquired three-phase current and three-phase voltage on the same side of the two lines in a same-tower mixed-voltage double-circuit line; and determining a fault line by utilizing the zero-sequence current, the negative-sequence current and the zero-sequence voltage of the two lines according to a preset judgment rule.According to the method, the fault line of the same-tower mixed-voltage double-circuit power transmission line is accurately identified by utilizing the station domain information, the action criterion of a non-fault line direction element is improved, and the fault line can be correctly cut off; the zero-sequence direction element misoperation caused by zero-sequence mutual inductance can be eliminated, the protection reliability is improved, and the accident range is limited to be expanded.

Description

technical field [0001] The present invention relates to the field of metering and calibration, and more specifically, relates to a method and system for determining faulty lines based on station domain information. Background technique [0002] Grid security is related to national security. Relay protection is the first line of defense for power system safety protection. Its rapid and reliable action is very important to curb the expansion of accidents and maintain the safe and stable operation of large power grids. Traditional substation protection devices are limited by local limited information and fixed action characteristics, making it difficult to form fast, reliable, and selective action decisions, resulting in excessively long delays and excessively large-scale removal of faults. [0003] The same-tower transmission line has been widely used in the construction of ultra-high voltage transmission lines in my country. The domestic power grid gathers a variety of diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R19/165G01R19/14
CPCG01R31/088G01R31/086G01R19/16571G01R19/14Y04S10/52
Inventor 王兴国王书扬郭雅蓉曹虹杜丁香陈争光戴飞扬蔡文瑞戚宣威王松
Owner CHINA ELECTRIC POWER RES INST
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