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Method and device for determining power grid fault

A grid fault and determination method technology, applied in the field of electric power, can solve problems such as inability to accurately determine grid faults

Active Publication Date: 2018-01-09
STATE GRID BEIJING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Embodiments of the present invention provide a method and device for determining a grid fault, at least to solve the technical problem that the grid fault cannot be accurately determined

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  • Method and device for determining power grid fault
  • Method and device for determining power grid fault
  • Method and device for determining power grid fault

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Embodiment Construction

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a method and device for determining a power grid fault. The method comprises the steps of obtaining current values of currents flowing through a plurality of power grid switches, each grid switch being used for controlling each node of a power grid to be switched on or off; detecting whether a current value of each current flowing through the power grid switch exceeds a pre-set current threshold; when detecting that the current value of the current flowing through the power grid switch exceeds the preset threshold, determining that a distribution line flowing through the power grid switch is a suspected faulty line, the suspected faulty line being a distribution line with a suspected fault in the power grid; determining the coincidence degree between a current curvecorresponding to the suspected faulty line and a current curve corresponding to a main switch in the power grid; determining whether the coincidence degree is less than a preset coincidence degree; and if determining that the coincidence degree is less than the preset coincidence degree, determining the suspected faulty line is the faulty line of the power grid. According to the invention, the technical problem that the power grid fault cannot be accurately determined is solved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and device for determining a grid fault. Background technique [0002] In the related technology, when locating the fault of the power grid, the automatic power distribution system usually determines whether a fault occurs according to the magnitude of the current value of the fault current flowing through the switch, but the scheme of detecting the current flowing through the switch cannot accurately determine the fault of the power grid. It is easy to misjudgment whether the line of the grid is faulty. At this time, when the grid line fault is misjudged, if the grid fault needs to be further modified, the faulty grid line will be classified as a non-fault area. The faulty power line has a higher voltage coincidence, which in turn leads to the tripping of adjacent lines and expands the scope of power outages. [0003] In view of the above-mentioned technical pr...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 徐晓进黄立华赵瑞张绍峰董楠李大志董晋阳杨楠刘昕王向群梁富军
Owner STATE GRID BEIJING ELECTRIC POWER
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