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Distribution network fault positioning method and device

A technology of distribution network fault and locating method, applied in the field of power grid, can solve the problems of reducing the efficiency of fault finding, unable to accurately determine the fault location, etc., and achieve the effect of improving the efficiency of fault finding.

Inactive Publication Date: 2018-03-27
海南电网有限责任公司琼海供电局
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present application provides a distribution network fault location method and device, which is used to solve the problem that the fault location cannot be accurately determined and the fault finding efficiency is reduced in the prior art

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  • Distribution network fault positioning method and device
  • Distribution network fault positioning method and device
  • Distribution network fault positioning method and device

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Embodiment Construction

[0026] In order to make the purpose, technical solution and advantages of the application clearer, the technical solution of the application will be clearly and completely described below in conjunction with specific embodiments of the application and corresponding drawings. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0027] In order to solve the problem that the fault location cannot be accurately determined and the efficiency of fault finding is reduced in the prior art, the embodiment of the present application provides a distribution network fault location method. A personal computer (Personal Computer, PC), a server, and the like can be configured to execute at least one of the met...

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Abstract

The application discloses a distribution network fault positioning method and device. The method includes the steps of obtaining a possible fault line set J, according to a possible fault line set JLof observable lines at monitoring points and a possible fault line set JV determined based on upstream and downstream directions of a voltage sag source; according to the possible fault line set J, extracting a first monitoring point of the lowest amplitude of three-phase voltage amplitudes of the monitoring points to determine a fault type of the first monitoring point; according to the possiblefault line set J and the fault type of the first monitoring point, determining the fault distance between an undetermined fault point and the first monitoring point and the fault resistance of the undetermined fault point; establishing a fault positioning model according to the voltage of each phase of each monitoring point, the fault distance and the fault resistance; and according to the fault positioning model, constraints, and a particle swarm algorithm, determining the fault point. Thus, accurate positioning of the fault point is achieved and the fault finding efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of power grids, and in particular to a fault location method and device for a power distribution network. Background technique [0002] With the rapid development of science and technology and the improvement of people's living standards, various users have put forward higher and higher requirements for the reliability of power system power supply. As the distribution network is directly connected with users, improving its power supply reliability is of great significance to improve the reliability of power system power supply. [0003] At present, fault location methods of distribution network usually use the structural parameters of the power grid, detection devices, transient information generated by faults, and use communication channels to collect information to complete fault location. For example, the impedance method based on the principle that different fault conditions correspond to diff...

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 李邦峂赵凤德苏宁吉承龙王昌洪王崇鲁黎源源王骥张国辉李江李华林家文
Owner 海南电网有限责任公司琼海供电局
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