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Distribution network fault location method and system

A distribution network fault and fault location technology, applied in the direction of fault location, information technology support system, fault detection according to conductor type, etc., to achieve the effect of reducing the solution space dimension, accurate fault location problem, and accurate results

Active Publication Date: 2019-03-22
QINZHOU POWER SUPPLY BUREAU OF GUANGXI POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a distribution network fault location method and system for the traditional fault location technology that cannot efficiently and accurately solve the problem of fault location in the distribution network containing distributed power

Method used

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  • Distribution network fault location method and system
  • Distribution network fault location method and system
  • Distribution network fault location method and system

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Experimental program
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Embodiment 1

[0025] In order to solve the problem that the traditional fault location technology cannot efficiently and accurately solve the fault location problem of the distribution network containing distributed power sources, the present invention provides a distribution network fault location method embodiment 1; figure 1 It is a schematic flow chart of Embodiment 1 of the distribution network fault location method of the present invention; as figure 1 As shown, the following steps may be included:

[0026] Step S110: Obtain the fault information of the remote terminal of the feeder when a fault occurs in the distribution network line;

[0027] Step S120: According to the operating status of the distribution network line, the fault information is coded to obtain the coded information of the corresponding power supply branch and the coded information of the passive branch in the distribution network line;

[0028] Step S130: according to the preset amnesty rules, eliminate the fault-f...

Embodiment 2

[0055] In order to solve the problem that the traditional fault location technology cannot efficiently and accurately solve the problem of fault location in the distribution network containing distributed power sources, the present invention also provides Embodiment 2 of a distribution network fault location method; figure 2 It is a schematic flow chart of Embodiment 2 of the distribution network fault location method of the present invention; as figure 2 As shown, it can include two stages: offline stage and online stage. The offline stage mainly implements the model establishment and area division of the distribution network, and sets the initial value of the tabu search algorithm according to the obtained distribution network model. In the online stage, the tabu search algorithm is used to locate the fault on the basis of the offline stage, which reduces the fault location time.

[0056] The offline phase steps include:

[0057] Step 1: Establish a distribution network f...

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Abstract

The invention relates to a distribution network fault location method and system. The distribution network fault location method comprises the steps that when a distribution network line is failed, the fault information of a remote terminal of a feeder line is acquired; the fault information is coded according to the operation state of the distribution network line, so as to acquire the coding information of a corresponding power supply branch and the coding information of a passive branch in the distribution network line; according to a preset amnesty rule, fault-free sections and redundancy fault information in the coding information are eliminated to acquire final fault information; and based on the final fault information, fault location is carried out based on initial parameters and initial variables of a tabu search algorithm to determine the failed area position of the distribution network line. According to the invention, failed area location is realized through tabu search; the method and system have the advantages of fast convergence speed, local optimum solution preventing, accurate result and the like; and fault location of a distribution network with distributed power supplies can be effectively and accurately realized.

Description

technical field [0001] The invention relates to a method for locating a distribution network fault area, in particular to a method and a system for locating a distribution network fault. Background technique [0002] At present, my country's transmission line fault location technology has made significant progress, and the location effect is good. However, with the development of various new renewable energy generation technologies, a large number of distributed power sources are connected to the distribution network, and the distribution of power flow and short-circuit current in the distribution network Great changes have been made: First, the fault current of the traditional distribution network is only provided by the main transformer power supply, which flows in one direction, and the access of distributed power sources makes the fault current flow in two directions; There is a fault current in the path from the main transformer power supply to the fault point. After mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 邹宇邱龙富韦军唐泽渊李汉锋王家福陈恒龙王德银周民施志强
Owner QINZHOU POWER SUPPLY BUREAU OF GUANGXI POWER GRID CO LTD
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