Power transmission line traveling wave fault location method using atomic decomposition

A technology for transmission line and traveling wave faults, applied in fault locations, information technology support systems, etc., can solve the problems of sparse decomposition results and low processing costs, and achieve the effects of simple adaptive expression, reduced processing costs, and improved flexibility

Active Publication Date: 2013-05-01
WUHAN UNIV
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Problems solved by technology

[0004] The present invention mainly solves the technical problems existing in the existing methods; it provides a method of finding the best matching atomic parameters in the over-complete redundant atomic library, so that

Method used

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  • Power transmission line traveling wave fault location method using atomic decomposition
  • Power transmission line traveling wave fault location method using atomic decomposition
  • Power transmission line traveling wave fault location method using atomic decomposition

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Embodiment

[0032] Below is the step that adopts the specific embodiment of the present invention, as follows:

[0033] 1. Data acquisition to obtain the voltage and current signals at both ends of the detected line

[0034] 1) The traveling wave data acquisition system uses the field programmable gate array (Field Programmable Gate Array, FPGA) as the central processing unit, and the voltage and current traveling wave signals on the secondary side of the transmission line are processed by the signal conditioning circuit and passed through the high-speed A / D conversion, synchronous dynamic random access memory (Synchronous Dynamic Random Access Memory, SDRAM) and first-in-first-out (First In First Out, FIFO) cache storage and PCI bus transmission to achieve high-speed data acquisition;

[0035] 2) This algorithm adopts dual-terminal positioning, which requires GPS (Global Positioning System) time synchronization to ensure the synchronization of data collection. When the system is runnin...

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Abstract

The invention relates to a power transmission line traveling wave fault location method, in particular to a power transmission line traveling wave fault location method using atomic decomposition. According to the method, voltage and current signals at both ends of a fault branch are taken as information on fault location, the synchronism of data is guaranteed by using a GPS (Global Positioning System) precise time service system; a fault signal is analyzed by using an atomic decomposition method; and the time for the wave head of traveling wave to reach double-end measuring units for the first time is acquired to realize accurate location of a power transmission line fault. The optimal matching atom and parameters thereof of the signal are adaptively searched on the basis of an over-complete redundant atom dictionary, so that adaptive expression of the signal becomes simple, a decomposition result changes extremely sparse, the information density and the flexibility in use are greatly improved, and the processing cost is reduced.

Description

technical field [0001] The invention relates to a distance measurement method for traveling wave faults of transmission lines, in particular to a distance measurement method for traveling wave faults of transmission lines using atomic decomposition. Background technique [0002] Accurate fault location of transmission lines is an important measure to ensure the safe and economical operation of the power grid, and it is a research difficulty and hotspot in the field of power systems. At present, the existing fault location methods are divided in principle, mainly including impedance method, fault analysis method and traveling wave method. Because the traveling wave method has fast positioning speed, high accuracy and is not affected by line parameters, system operation mode, CT saturation, The advantages of factors such as fault type and transition resistance, so it has better development prospects than other ranging methods. However, there are still some problems in the tra...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 龚庆武关钦月李勋刘晓飞
Owner WUHAN UNIV
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