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Method and system for adaptive time-frequency peak filtering of power signals

A power signal and peak filtering technology, applied in the field of electric power, can solve the problem that the filter is difficult to achieve the filtering effect, and achieve the effect of strong filtering effect

Inactive Publication Date: 2018-12-21
GUANGDONG UNIV OF PETROCHEMICAL TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide an adaptive time-frequency peak filtering method and system for power signals to solve the problem that traditional filters are difficult to achieve ideal filtering effects in non-stationary and non-Gaussian noise environments

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  • Method and system for adaptive time-frequency peak filtering of power signals
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  • Method and system for adaptive time-frequency peak filtering of power signals

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[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0053] The purpose of the present invention is to provide an adaptive time-frequency peak filtering method and system for power signals, which can enhance the filtering effect on non-stationary and non-Gaussian noise in the power signal sequence.

[0054] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying dr...

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Abstract

The invention discloses an adaptive time-frequency peak filtering method and a system for a power signal. The filtering method comprises the following steps of: obtaining a power signal sequence; determining a time window length of each signal in the power signal sequence according to the power signal sequence; performing point-by-point processing on the power signal sequence to construct an analytic sequence; determining a pseudo Wigner-Ville of the parsed sequence at different lengths of the time window; according to the pseudo Wigner-Ville distribution, determining the power signal recoverysequence; determining a distribution range of a pure power signal according to the power signal recovery sequence; the pure power signal being a noise-free power signal; determining an optimal time window length according to the distribution range; The power signal sequence is filtered according to the optimal time window length, and the filtered power signal sequence is determined. The filteringmethod and the system provided by the invention can enhance the filtering effect of the non-stationary non-Gaussian noise in the power signal sequence.

Description

technical field [0001] The invention relates to the field of electric power, in particular to an adaptive time-frequency peak filtering method and system for power signals. Background technique [0002] With the development of smart grid, the analysis of household electricity load becomes more and more important. Through the analysis of electricity load, household users can obtain the electricity consumption information of each electrical appliance in a timely manner, as well as a detailed list of electricity charges; the power department can obtain more detailed user electricity consumption information, and can improve the accuracy of electricity load forecasting, Provide the basis for overall planning for the power sector, and at the same time, use the electricity consumption information of each appliance to know the user's electricity consumption behavior, which has guiding significance for the research of household energy consumption assessment and energy-saving strategi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06F2218/04
Inventor 翟明岳
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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