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Power distribution network fault positioning method and system based on traveling wave space-time matrix

A technology of distribution network fault and positioning method, applied in satellite radio beacon positioning system, fault location, radio wave measurement system and other directions, can solve the problems of many branch T contacts, many reflected waves, large measurement error, etc. Operation, reduce fault location time, good practical value effect

Pending Publication Date: 2022-06-28
四川思极科技有限公司
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Problems solved by technology

However, the above research is mainly applied to transmission lines with simple grid structure, 10kV distribution lines have many branch T contacts, and there are many reflected waves when the waveform reaches the measuring device, resulting in large measurement errors

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  • Power distribution network fault positioning method and system based on traveling wave space-time matrix
  • Power distribution network fault positioning method and system based on traveling wave space-time matrix
  • Power distribution network fault positioning method and system based on traveling wave space-time matrix

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Embodiment Construction

[0070] Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures denote elements that have the same or similar functions. While various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0071] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

[0072] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following detailed description. It will be understood by those skilled in the art that the present disclosure may be practiced without certain specific details. In some instances, methods, means, components a...

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Abstract

The invention provides a power distribution network fault positioning method and system based on a traveling wave space-time matrix, and relates to the technical field of digital power. According to the method, the initial traveling wave signals are injected into the power distribution network, and the initial traveling wave signals are checked by using the measuring devices on the sub-paths of the power distribution network, so that the topological relation of the power distribution network is identified and verified; on the basis, the geographic position of the power distribution network is extracted through a measuring device, and a space-time coupling matrix is established by fusing the topological relation of the power distribution network; therefore, the space-time coupling information is acquired; then, through fault traveling wave time difference analysis and fault traveling wave time difference distance measurement calculation, the specific position of a fault point in the power distribution network is determined; and finally, correcting the fault position information of the power distribution network through the fault traveling wave time difference data of other measuring devices, and completing the positioning of a fault point. Compared with the prior art, the method can perform remote unmanned rapid positioning on the fault point of the power distribution network, and has good practical value in a large-range power distribution network scene.

Description

technical field [0001] The invention relates to the technical field of digital power, in particular to a distribution network fault location method and system based on a traveling wave space-time matrix. Background technique [0002] With the rapid development of China's economy, the demand for electricity continues to increase, and the scale of the distribution network is expanding. China's 10kV distribution network is widely distributed geographically, and some 10kV distribution network lines are more than 100 kilometers long, which takes a long time for distribution network inspection and fault finding. China's 10kV distribution network adopts the neutral point ungrounded or grounded through arc suppression coils. After the single-phase grounding fault of the 10kV distribution network caused by lightning strikes on trees and mountain fires, the 10kV distribution network does not constitute a short circuit, and the line voltage is still symmetrical , 10kV distribution net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01S19/14
CPCG01R31/086G01R31/088G01S19/14
Inventor 唐冬来李科峰陈文康杨梅钟声陈泽宇谢飞龚奕宇聂潇康乐钟旭付世峻李擎宇周鹏
Owner 四川思极科技有限公司
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