Hierarchical location method for locating fault of active power distribution network by utilizing multi-source data

An active distribution network, multi-source data technology, applied in the electric power field, can solve the problem that the positioning accuracy cannot meet the demand and so on

Active Publication Date: 2018-06-12
JIANGSU ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The problem to be solved by the present invention is: the fault location method based on impedance is widely used in distribution network fault location, but its positioning accuracy cannot meet the demand and needs to be improved

Method used

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  • Hierarchical location method for locating fault of active power distribution network by utilizing multi-source data
  • Hierarchical location method for locating fault of active power distribution network by utilizing multi-source data
  • Hierarchical location method for locating fault of active power distribution network by utilizing multi-source data

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Embodiment Construction

[0048] On the basis of the traditional fault location method, the present invention comprehensively uses multi-source data such as circuit breaker, section switch and tie switch monitoring terminal FTU (Feeder terminal unit, feeder terminal equipment) information in the power grid, and simultaneously analyzes the traditional R-L model algorithm Improvements are made, and a hierarchical location method for active distribution network faults using multi-source data is proposed. The method is divided into two levels: initial area-level positioning and precise line-level positioning. Firstly, the fault description matrix is ​​constructed by using the uploaded monitoring information of the circuit breaker, section switch and tie switch at the time of the fault to determine the scope of the fault section, and then within the scope of the determined fault section, the improved The R-L model algorithm calculates the exact location of the faulty line. Through verification, the method ...

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Abstract

The invention provides a hierarchical location method for locating the fault of an active power distribution network by utilizing multi-source data. The method comprises two levels of initial region layer positioning and accurate line layer positioning. According to the method, firstly, the information of a circuit breaker, a section switch and an interconnection switch monitoring terminal FTU, which is uploaded at a fault moment, is comprehensively utilized. The information is subjected to fault section area layer positioning, and then a line layer is positioned in the determined range of a fault section. The calculation is carried out by utilizing the electric quantity information of nodes at the two ends of the fault section and then an accurate fault position is obtained. The result ofthe verification shows that, the method is not influenced by the fault type and the position, and the fault positioning is rapidly realized. The adopted fault positioning principle is simple and reliable. The method is strong in anti-transition resistance capability and the sampling frequency requirement of the method is not high. Meanwhile, the fault positioning precision can be improved by increasing the sampling frequency, so that the method has higher practical application value.

Description

technical field [0001] The invention belongs to the technical field of electric power, relates to electric power system relay protection, and is a layered positioning method for active distribution network faults using multi-source data. Background technique [0002] With the development of modern power system, the network of distribution network is becoming more and more complex, and the capacity and voltage level are constantly increasing. The safe and normal operation of distribution network has become a key link in serving grid users. In the operation monitoring of distribution network, it is the key to improve the reliability of power supply of distribution network to quickly realize accurate fault location and distance measurement after line fault. [0003] When a phase-to-phase short circuit fault occurs on the line, it will be accompanied by an overcurrent phenomenon, which is easy to realize fault identification. Single-phase-to-ground fault is the most common type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 马洲俊郑玉平高昇宇黄文焘张明孙昕杰卫志农张林王春宁郭璇叶婷
Owner JIANGSU ELECTRIC POWER CO
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