Distributed power distribution network fault positioning method and system

A technology for distributed distribution network and fault location, which is applied in the direction of fault location, information technology support system, fault detection according to conductor type, etc., and can solve problems such as fault location of fault location devices

Inactive Publication Date: 2020-07-10
SHANDONG UNIV OF TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the present invention proposes a distributed power distribution fault location method and system, which can solve the problem of fault location when the fault location device is out of sync

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  • Distributed power distribution network fault positioning method and system
  • Distributed power distribution network fault positioning method and system
  • Distributed power distribution network fault positioning method and system

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Embodiment Construction

[0076] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0077] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Description...

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Abstract

The invention discloses a distributed power distribution network fault positioning method and system, and the method comprises the following steps: 1, determining a fault positioning domain by employing a fault positioning device and the tail end of a line / branch as boundaries, and constructing a fault positioning matrix; 2, measuring the zero line mode time difference of the positioning node, andconstructing a zero line mode arrival time difference matrix of each fault positioning node; 3, determining the node corresponding to the minimum value as the main positioning point of the whole network and the positioning domain thereof when a fault occurs; 4, selecting a node with the minimum time difference in the boundary of the positioning domain and determining the positioning domain of thenode; 5, determining a possible fault area; and 6, carrying out fault positioning on the possible fault area according to a fault positioning rule. According to the invention, positioning can be carried out when the out-of-step condition of the fault positioning device occurs, and the method is not easily affected by line length, online equipment and the like when the modulus speed difference isused for fault positioning, so that the error of fault positioning is greatly reduced.

Description

technical field [0001] The invention relates to a distributed distribution network fault location method and system, belonging to the technical field of distribution automation. Background technique [0002] There are many branch lines in my country's power distribution network, the length of the section line is inconsistent, and there are many types of loads at the end of the line. Previously, the fault location of the distribution network was through the action of the fault location equipment at the substation end and the downstream location device of the fault point, and then cooperated with the existing fault location in the line. A protective device operates to locate the fault. However, due to the complex structure of the distribution network, when the transient high-frequency signal generated by the fault has undergone multiple reflections at the branch nodes of the line and the energy on the line has attenuated, the strength of the fault signal cannot reach the start-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 刘洋王舢姗王蕾华斌朱征鲍伟
Owner SHANDONG UNIV OF TECH
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