Signal noise reduction method and device

A noise reduction and signal technology, applied in the field of signal processing, can solve the problems of aging of insulating materials, local temperature rise of equipment, and shortened life of power equipment.
CN108957262AActive Publication Date: 2018-12-07SHENZHEN FRIENDCOM TECH DEV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN FRIENDCOM TECH DEV
Publication Date
2018-12-07

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Abstract

The embodiment of the invention provides a signal noise reduction method and device; the method comprises the following steps: using discrete partial discharge signals to build a first Hankel matrix;carrying out singular value decomposition and rank annihilation for the first Hankel matrix so as to obtain a first rank annihilation matrix; carrying out singular spectrum analysis for the first rankannihilation matrix so as to obtain a second Hankel matrix; using a deck algorithm to iterate the second Hankel matrix so as to realize dimension reduction, thus obtaining a target rank annihilationmatrix after a preset iteration number; using a first column element and a last column element of the target rank annihilation matrix to form a low rank filtered signal, thus obtaining a noise reduction partial discharge signal. The method introduces the deck algorithm for rank annihilation in the noise reduction process, thus removing noises in the partial discharge signals, and well keeping valid signals.
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Description

technical field

[0001] The present invention relates to the technical field of signal processing, in particular to a signal noise reduction method and device. Background technique

[0002] Partial discharge in key parts of power equipment will cause the local temperature of the equipment to rise and the insulation material to age, which will shorten the life of the power equipment. Partial discharge is the characteristic quantity that can best characterize the insulation performance among many detection objects.

[0003] Partial discharge signals are subject to external electromagnetic interference, and due to the complex internal structures of power equipment such as switch cabinets and transformers, they usually undergo multiple reflections and refractions during propagation before reaching the receiving antenna. Generally, the strength of the received partial discharge signal is small and contains a lot of noise. How to effectively reduce the noise of the partial discha...

Claims

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