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Method for locating a short circuit in an electrical network comprising at least one conductor segment

A technology of wire segments and power grids, applied in the direction of measuring electricity, fault location, measuring electrical variables, etc., can solve problems such as error-prone, troublesome power grid, outdated, etc.

Active Publication Date: 2020-08-28
SIEMENS MOBILITY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manual calculations are error prone and outdated
Furthermore, the conventional generation of distance-reactance curves by local multiple measurement of short-circuit reactance values ​​or by cost-intensive simulations is cumbersome and error-prone for the grid operator

Method used

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  • Method for locating a short circuit in an electrical network comprising at least one conductor segment
  • Method for locating a short circuit in an electrical network comprising at least one conductor segment
  • Method for locating a short circuit in an electrical network comprising at least one conductor segment

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Embodiment Construction

[0032]figure 1 A diagram of the distance reactance curve 1 for the positive feeder and the distance reactance curve 2 for the negative feeder of a network of an autotransformer system is shown. The short-circuit reactance X of the grid near the location within the grid is drawn. Each distance-reactance curve 1 or 2 has a plurality of segments 3 , which each correspond to a line segment of the grid and which each show the distance-reactance curve for the corresponding line segment. Distance-reactance curves 1 and 2 are considered separately below in order to explain an example configuration of the method according to the invention.

[0033] figure 2 shown in figure 1 Illustration of the distance-reactance curve 1 for the positive feeder of the grid for an autotransformer system shown in . The distance-reactance curve 1 is divided corresponding to the individual conductor segments or segments 3 . Each segment 3 represents the course of the distance-reactance curve of a cond...

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PUM

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Abstract

The invention relates to a method for locating a short circuit in an electrical network comprising at least one conductor segment, in particular in an electrical network of an autotransformer system, comprising the steps of: - acquiring segment-specific parameters of the conductor segment; Certain parameters derive at least one mathematical function, wherein the mathematical function represents the short-circuit reactance of the conductor segment as a function of the position within the conductor segment; and the position of the short circuit within the conductor segment is derived from the mathematical function and the short-circuit reactance value determined for the short circuit.

Description

technical field [0001] The invention relates to a method for locating a short circuit in an electrical network comprising at least one conductor segment. [0002] Furthermore, the invention relates to a device for locating a short circuit in a network comprising at least one conductor section, in particular in a network of an autotransformer system. Background technique [0003] For operators of power grids, for example energy companies or railway utilities, it is of increasing importance to quickly locate and determine short circuits in a running power grid. For this purpose, distance protection relays are usually used, which can locate the short circuit on the basis of the measured short-circuit reactance. The respective measured short-circuit reactance and the respective short-circuit distance determined therefrom, ie the respective location at which the short-circuit occurred, can be provided by the distance protective relay in the form of electronic information to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor R.比安奇
Owner SIEMENS MOBILITY GMBH
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