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A Solution to the Dilemma Inrush/Fault in Transformer Differential Relaying Using MRA and Wavelets

机译:基于MRA和小波的变压器差动保护突入/故障的解决方案。

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摘要

In this article, multiresolution analysis (MRA) and wavelets are applied to the study of the existence of an internal short circuit in a transformer. An analytical support is given to the proposal of a relaying technique based on the derivation of the existence of specific singularities in the modulus of the space vector as obtained from the three differential signals. The proposal stems from the quite different travel angles of the space vector: maximum 120 degrees for healthy inrush and 360 degrees for fault. The sharp notches in the modulus of the space-vector are then detected using de first detail in MRA.
机译:在本文中,多分辨率分析(MRA)和小波被应用于研究变压器内部短路的存在。基于从三个差分信号获得的空间矢量模量中存在特殊奇异性的推导,为中继技术的提议提供了分析支持。该提议源于空间矢量的完全不同的传播角度:对于健康涌流,最大120度;对于断层,最大360度。然后使用MRA中的第一个细节检测空间矢量的模数中的尖锐缺口。

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