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A distribution network protection method and system based on fault feature matching

A fault feature and fault technology, which is applied in the direction of emergency protection circuit devices, parts of emergency protection devices, electrical components, etc., can solve the problems of reducing the efficiency of protection actions, not being able to further determine the protection strategy, and affecting the rapid determination of fault locations, etc., to achieve The effect of promoting orderly normal operation

Active Publication Date: 2019-10-22
SHENZHEN POWER SUPPLY BUREAU
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Problems solved by technology

[0004] However, the existing technology still has some shortcomings: First, it lacks a multi-dimensional overall analysis of the primary system wiring mode, operation mode, line fault situation and protection configuration situation, and can only realize fault distance measurement, and cannot further determine the protection strategy
In addition, every time the topology of the system network is determined, it must be calculated and verified, which affects the rapid determination of the fault location and reduces the efficiency of protection actions

Method used

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  • A distribution network protection method and system based on fault feature matching
  • A distribution network protection method and system based on fault feature matching
  • A distribution network protection method and system based on fault feature matching

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Embodiment Construction

[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0064] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, and the related Other details are not relevant to the invention.

[0065] like figure 1 As shown, it shows a schematic diagram of the main flow of an embodiment of a distribution network pro...

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Abstract

The invention provides a power distribution network protection method based on fault feature matching. The method comprises following steps: step one, when a power distribution network is at fault, obtaining the current fault characteristic values of all positions of the power distribution network in real time; step two, matching the current fault characteristic values of all positions of the power distribution network with reference fault characteristic values, which are corresponding to each fault type pre-stored in fault type database, to obtain the fault type corresponding to the current fault; step three, according to the fault type, inquiring a protection strategy corresponding to the fault type in protection strategy database; and step four, according to the inquired protection strategy, forming protection motions, and executing the protection motions to protect the failed power distribution network. The invention also provides a corresponding system. The method and system can quickly position the faults and the maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power supply network, in particular to a distribution network protection method and system based on fault feature matching. Background technique [0002] With the continuous expansion and construction of the distribution network and the access of a large number of distributed power sources, the topology of the distribution network is complex and prone to failure. The wiring mode, operation mode and protection configuration of the primary system of the distribution network are becoming more and more complex, and the adaptation of various protection principles in different modes is quite different. However, the existing distribution network is usually only equipped with current sampling components. The protection principle adopts overcurrent protection, optical fiber longitudinal differential protection, etc. to detect faults on the line, cascade according to the connection of the line, and establish a mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/26H02H1/00
Inventor 李艳刘子俊张安龙郑曦简学之晋龙兴苏忠阳
Owner SHENZHEN POWER SUPPLY BUREAU
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