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A distribution network section location method based on Hausdorff in the characteristic frequency band

A technology of characteristic frequency band and segment location, which is applied to the fault location and the direction of fault detection according to conductor type, so as to avoid the blind spot of location.

Active Publication Date: 2020-11-24
CHINA THREE GORGES UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the linear correlation method, this method is still affected by the system grounding method and positioning blind area

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  • A distribution network section location method based on Hausdorff in the characteristic frequency band
  • A distribution network section location method based on Hausdorff in the characteristic frequency band
  • A distribution network section location method based on Hausdorff in the characteristic frequency band

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Embodiment Construction

[0040]A distribution network section location method based on Hausdorff in the characteristic frequency band. By analyzing the fault characteristics of the transient zero-sequence current free component, the upstream adjacent node of the fault point and the information amplitude ratio characteristics of the characteristic frequency band of the downstream node are determined, and It is obtained that the free component of the transient zero-sequence current at the adjacent node at the fault point has the same frequency band, and the characteristic frequency band is selected based on the characteristic frequency band of the upper node in the adjacent node, and the amplitude ratio k>>1. Hausdorff distance algorithm with image feature matching and abnormal data tolerance is introduced to measure and calculate the matching degree of transient zero-sequence current amplitude feature based on the upstream characteristic frequency band, and further compare with the set threshold to effec...

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Abstract

The present invention provides a method for positioning a distribution network segment based on Hausdorff in a feature frequency band. The method comprises the steps of: analyzing fault features of atransient zero-sequence current free component to determine an upstream adjacent node of a fault point and the feature frequency band information amplitude ratio feature of a downstream node thereof to obtain the same frequency band of the transient zero-sequence current free component of the adjacent node at the fault point, wherein he feature frequency band is selected by taking the upper-levelnode feature frequency band in the adjacent nodes as standard, the amplitude ratio k>>1, and the feature frequency bands of the transient zero-sequence current free components of the upstream adjacentnodes of the fault point are the same, and the information matching is high. Reliable basis is conveniently constructed to perform band information normalization. An image matching algorithm Hausdorff is introduced to measure the transient current features of adjacent nodes to provide a data window translation optimization strategy for elimination of data out-of-synchronization to finally obtaina matching degree value, further set a threshold and compare and determine a fault section.

Description

technical field [0001] The present invention relates to a positioning method for a distribution network feeder section, in particular to a Hausdorff-based distribution network section positioning method under a characteristic frequency band Background technique [0002] The National Energy Administration announced the "Action Plan" for the construction of the distribution network in 2015, pointing out that the investment in the transformation of the distribution network should not be less than 2 trillion yuan. The power outage time does not exceed 1 hour, reaching the international advanced level. At present, the wiring mode of domestic distribution network basically adopts ungrounded neutral point or grounded through arc suppression coil. When a single-phase ground fault occurs in the distribution feeder of the arc-suppression coil grounding system, the zero-sequence current power frequency information of the fault line is similar to that of the non-fault line, so it is di...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086
Inventor 李振兴王朋飞傅裕挺李振华徐艳春邱立
Owner CHINA THREE GORGES UNIV