FTU-based power distribution network fault positioning method

A technology of distribution network fault and location method, applied in fault location, information technology support system and other directions, to achieve the effect of fast calculation speed, simple judgment principle and small calculation amount

Inactive Publication Date: 2015-08-05
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method does not require cumbersome matrix multiplication operations, and can well solve the problems of feeder end fault location and multi-point fault location. The judgment principle is simple and effective

Method used

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  • FTU-based power distribution network fault positioning method
  • FTU-based power distribution network fault positioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the following is the use of matrix operations to attach figure 2 The implementation steps for locating faults in the feeder area of ​​the distribution network shown in the diagram.

[0028] Step 1: Select nodes and number them. For a feeder with a radial structure including power sources, loads and switches, the feeder terminal unit (FTU), section switch and tie switch are regarded as nodes and numbered. according to figure 2 The switch nodes are numbered as shown.

[0029] Step 2: Determine the positive direction of the network wiring. The power direction of the network during normal operation is taken as the positive direction of the network wiring. according to figure 2 The direction shown specifies the positive direction.

[0030] Step 3: Form a network description matrix D. The current flows from node 1 to node 2, and the current direction is the same as the specified positive direction, then d12=1, and d21=0, and there is no feeder connec...

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Abstract

The invention provides an FTU-based power distribution network fault positioning method which belongs to the field of distribution automation. The FTU-based power distribution network fault positioning method mainly settles a fault positioning problem in a 10KV feeder line of a power distribution network. According to the FTU-based power distribution network fault positioning method, a power distribution network describing matrix D is formed according to the topological structure of the feeder line of the power distribution network; fault information is acquired through the FTU; then a fault current branch end node determining matrix P is generated according to the fault information; the end node of the fault current branch can be effectively determined according to related factors in the P; and the line after the node is the fault segment. The FTU-based power distribution network fault positioning method realizes fault positioning for the feeder line of the power distribution network and has an advantage of simple and effective determining principle. Complicated multiplexing calculation is not required. Furthermore the FTU-based power distribution network fault positioning method can well settle problems of feeder line end fault positioning and multi-point fault positioning.

Description

technical field [0001] The invention belongs to the field of distribution automation and relates to an FTU-based distribution network fault location method. Background technique [0002] Due to the rapid development of modern science and technology and the great improvement of people's living standards, modern power users have put forward higher requirements for power quality. The implementation of smart grid construction and the realization of distribution network automation play a very important role in improving the reliability, security and quality of power supply in distribution network. Distribution network feeder automation is an important part of distribution network automation, and distribution network fault location is the core of distribution network feeder automation. Distribution network fault location is the premise of realizing distribution network fault isolation and restoring power supply, and it has extremely important significance for improving distributi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 黄世泽郭其一徐秋勇周建国沈海荣
Owner TONGJI UNIV
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