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Method and system for positioning and identifying fault of power transmission line

A transmission line and fault location technology, applied in the field of power system, can solve the problems of easy misjudgment, low accuracy of analysis and location results, etc., and achieve the effect of accurate fault location.

Pending Publication Date: 2022-06-07
EAST CHINA BRANCH OF STATE GRID CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method and system for fault location and identification of transmission lines, which solves the problem of low accuracy and easy misjudgment of the analysis and location results of transmission line faults in the prior art

Method used

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  • Method and system for positioning and identifying fault of power transmission line
  • Method and system for positioning and identifying fault of power transmission line
  • Method and system for positioning and identifying fault of power transmission line

Examples

Experimental program
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Effect test

Embodiment 1

[0035] like figure 1 As shown, the present invention proposes a method for fault location and identification of transmission lines, including a fault location method and a fault identification method,

[0036] The fault location method includes:

[0037] Obtain the current phasors and voltage phasors before and after the failure of all transmission lines ij in the target area, as well as the state quantities of circuit breakers and relays before and after the failure of transmission lines ij;

[0038] Perform a first fault location on the transmission line in the target area according to the state quantities of the circuit breaker and the relay before and after the failure of the transmission line ij;

[0039] According to the current phasor, the voltage phasor and the first fault location before and after the fault of the transmission line ij, the improved breadth-first search algorithm is used to locate the second fault of the transmission line in the target area;

[0040]...

Embodiment 2

[0085] Based on the same inventive concept of Embodiment 1 above, the present invention also proposes a system for analyzing and locating transmission line faults, including a fault locating module, where the fault locating module includes:

[0086] The first obtaining module is used to obtain the current phasors, voltage phasors, and state quantities of circuit breakers and relays before and after the failure of all transmission lines ij in the target area;

[0087] a first location module, configured to perform a first fault location on the transmission line ij in the target area according to the state quantities of the circuit breaker and the relay before and after the failure of the transmission line ij, and determine the transmission line in which the fault occurs;

[0088] The second locating module is configured to use the improved breadth-first search algorithm to locate the second fault of the faulted transmission line by using the current phasor and the voltage phasor...

Embodiment 3

[0094] Based on the same inventive concept of Embodiment 1 above, the present invention further provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the The steps of a method of transmission line fault location identification.

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Abstract

The invention relates to the technical field of power systems, and provides a power transmission line fault positioning identification method and system, and the method comprises the steps: obtaining current phasors and voltage phasors before and after a fault of a target domain power transmission line, and state quantities of a circuit breaker and a relay; and an improved breadth-first search algorithm is adopted to carry out fault positioning on the target domain power transmission line. According to the technical scheme, on the premise of the fault line Kirchhoff's law, the breadth-first search algorithm is improved, and more accurate power transmission line fault positioning can be achieved.

Description

technical field [0001] The invention relates to the technical field of power systems, and in particular, to a method and system for fault location and identification of transmission lines. Background technique [0002] Driven by the development and construction of the Energy Internet and the Ubiquitous Power Internet of Things, the trend of regional interconnection of power systems, interconnection of multiple energy sources, and global interconnection is becoming more and more obvious. As a result, the power grid structure expands in a wide range, the probability of failure of power transmission lines increases, and the types of faults continue to increase, making it more and more difficult to analyze and locate power system transmission line faults. It is the core and foundation to ensure the safe and stable operation of the power system to carry out accurate and rapid analysis and location of power system transmission line faults. [0003] At present, the identification ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/52G01R31/54G01R31/58
CPCG01R31/085G01R31/52G01R31/54G01R31/58Y04S10/52
Inventor 刘虎林刘中平邱智勇倪腊琴叶海桂强韩俊苏柏松李雪冬李书琦
Owner EAST CHINA BRANCH OF STATE GRID CORP
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