Power distribution network broken line fault location method

A technology of disconnection fault and positioning method, which is applied in the direction of fault location, measurement of electricity, and measurement of electrical variables, etc., which can solve problems such as waste of manpower, low efficiency, and difficult positioning

Active Publication Date: 2012-10-03
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the fault situation where the ground is not formed after the disconnection, no obvious fault characteristics are caused, and it is difficult to locate
At present, manual line inspection is mostly used to check and locate disconnected and ungrounded faults, which not only wastes manpower, but also inefficiencies

Method used

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  • Power distribution network broken line fault location method
  • Power distribution network broken line fault location method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1: Implementation based on distributed intelligence:

[0072] This embodiment is used to deal with disconnection faults in the distribution network. The general idea is to set up multiple agents in the distribution network, and each agent has functions such as program operation, data storage, electrical quantity detection, wire stress detection, and information communication. Distributed intelligence uses the collected and received power grid operation information, combined with the grid structure characteristics, operation mode, and its own location, to use the modeled distribution network disconnection fault location method library to diagnose distribution network disconnection faults.

[0073] specific, figure 1 It is the distributed intelligence-based distribution network disconnection fault location method flow provided by this embodiment, including the following steps:

[0074] (1) Multiple agents are set up in the distribution network, and each agent...

Embodiment 2

[0423] Embodiment 2: Implementation mode based on centralized control:

[0424] This embodiment is used to deal with disconnection faults in the distribution network. The general idea is to set up control centers and monitoring points in distributed layout in the distribution network. According to the data collected and reported by each monitoring point in real time, the control center uses the modeled distribution network disconnection fault location method library to diagnose the distribution network disconnection fault in combination with the structure characteristics and operation mode of the power grid.

[0425] Specifically, the following steps are included:

[0426] (1) Set up the monitoring points of the control center and decentralized layout in the distribution network. The control center has functions such as program operation, data storage, and information communication. The monitoring point has functions such as electrical quantity detection, wire stress detect...

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Abstract

The invention discloses a power distribution network broken line fault location method. According to a structure of a power distribution network and a power supply mode, a local power distribution network line section is divided into a plurality of kinds of typical sections, and characteristics of voltage and load flow of each of endpoints of the typical sections in different broken line faults are proposed. During application, the characteristics of each local line section of the power distribution network are matched with the typical sections, types of the typical sections which the each local line section belongs to are determined, the measured characteristics of the voltage and the load flow of each of the endpoints in the each local line section are matched with the characteristics of the voltage and the load flow of each of the endpoints of the typical sections in the different broken line faults to judge whether the line section has the broken line fault and to judge types of the broken line faults, and the typical sections correspond to the line section. According to the power distribution network broken line fault location method, a modeling rule is used for customizing the method, and the comprehensiveness and the reliability for problem processing are achieved; the customization of the rule is flexible and prone to adapt to a plurality of operating modes of the power distribution network; the location is accurate, and the fault location of sections can be achieved; and human line patrolling is avoided, and the power distribution network broken line fault location method is an ideal method.

Description

Technical field: [0001] The invention relates to the field of electric power system and automation thereof, in particular to a method for locating a disconnection fault of a distribution network. Background technique: [0002] In the distribution network, whether it is an overhead line or a cable line, disconnection faults occur from time to time. Among them, the fault characteristics of disconnection and grounding are more obvious. There are many methods for identifying such faults, for example, based on ground fault transient components and harmonic characteristics. The positioning and ranging methods are mainly divided into two categories: impedance method and traveling wave method. For example, starting from the centralized parameter equivalent network model of a single-power radial grid, a dual-frequency analysis method is used to find out the relationship between the test parameters of the power supply end and the location of the fault when a disconnection fault occu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/02
CPCY04S10/522Y04S10/52
Inventor 盛万兴宋晓辉李雅洁孟晓丽史常凯刘永梅常松李建芳贾冬梨张瑜仉天舒胡丽娟
Owner CHINA ELECTRIC POWER RES INST
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