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Power distribution line self-adaptive current quick-breaking protection method based on matrix pencil

A technology for power distribution lines and current quick disconnection, which is applied to emergency protection circuit devices, electrical components, etc., and can solve problems such as attenuating the influence of DC components

Inactive Publication Date: 2013-01-09
XI AN JIAOTONG UNIV +1
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  • Summary
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Problems solved by technology

[0006] The invention aims at overcoming the shortcoming that the existing self-adaptive current quick-break protection is susceptible to the influence of the attenuated DC component in the electrical quantity, and provides an adaptive current quick-break protection method for distribution lines based on matrix bundles

Method used

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  • Power distribution line self-adaptive current quick-breaking protection method based on matrix pencil
  • Power distribution line self-adaptive current quick-breaking protection method based on matrix pencil
  • Power distribution line self-adaptive current quick-breaking protection method based on matrix pencil

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Embodiment Construction

[0084] The present invention will be further described below in conjunction with accompanying drawing.

[0085] A new method for adaptive current quick-break protection of distribution lines based on the principle of matrix beam. This method introduces the matrix beam algorithm. On the basis of accurately extracting power frequency components, the optimal criterion is selected online for different fault types, specifically including Follow these steps:

[0086] Step 1: Sampling the line current and voltage at the protection installation site to obtain a sampling sequence, and then use the matrix beam algorithm to extract the corresponding current and voltage power frequency components of the sampling sequence, and its amplitude and phase can be obtained by formula (11).

[0087] The basic idea of ​​the matrix bundle is: construct two special data matrices according to the sampled data, and use the relationship between the data matrices to solve their generalized eigenvalues. T...

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Abstract

The invention provides a power distribution line self-adaptive current quick-breaking protection method based on a matrix pencil. A power frequency quantity extracting method based on a matrix pencil algorithm is introduced into the protection, thus the influence of non-periodic components in electric quantity is effectively avoided, the power frequency quantity is extracted rapidly and accurately, and the action property of the traditional self-adaptive current quick-breaking protection is remarkably improved.

Description

technical field [0001] The invention relates to the field of relay protection for power system distribution lines, in particular to a method for self-adaptive current quick-break protection of distribution lines based on matrix bundles. Background technique [0002] The distribution network directly faces users, which is a key link to ensure power supply quality, improve power grid operation efficiency, and innovate user services. However, my country's distribution network investment is relatively insufficient, and the degree of automation is still relatively low. In terms of power supply quality, it is still far from the international advanced level. There is a big gap, and because most of the distribution network supplies power to users through a single power supply radiation network, more than 80% of the power outages suffered by power users are caused by the distribution system, so the distribution network is the cause The main factor for the deterioration of power quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
Inventor 宋国兵田小强赵林平王显峰祁胜利李德坤
Owner XI AN JIAOTONG UNIV
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