A method and system for filtering coherent noise

Abstract

The invention discloses a coherent noise filtering method and a system. The filtering method comprises the following steps: obtaining measured power signal parameters; starting from the first measuredpower signal of the measured power signal sequence, an iterative algorithm being used to select L power signals to determine the power vector; determining a historical background noise according to the power vector; determining a filter parameter of a coherent noise filter according to the historical background noise; determining a weight of the coherent noise filter according to the historical background noise using an optimization criterion of minimizing signal variance; obtaining the power and the serial number of the measured power signal to be filtered out; according to the historical background noise, the filtering parameter, the weight, the power and the serial number of the measured power signal to be filtered, filtering the background noise of the measured power signal to be filtered, and determining a noise-free power signal. The filtering method and the system provided by the invention can improve the impulse noise detection accuracy and the coherent noise filtering accuracy.

Description

technical field [0001] The invention relates to the field of coherent noise filtering, in particular to a coherent noise filtering method and system. 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; at the same time, use the electricity consumption information of each electrical appliance to know the user's electricity consumption behavior, which has guiding significance for household energy consumption assessment and energy-saving strategy research. [0003] At present,...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a coherent noise filtering method and system to solve the problems of low detection accuracy of impulse noise and low precision of coherent noise filtering

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