A Power Signal Filtering Method for Switching Event Detection

Abstract

The invention provides a power signal filtering method for switching event detection, which is used for solving the problem that in the prior art the work signal filtering which have background noisewith obvious non-stationarity and non-Gaussian characteristics cannot effectively and difficult to carry out the switch event detection accurately. The method comprises the following steps of: carrying out the summation of all scales on the filtered power signal to obtain the filtered power matrix. The power signal filtering method for switching event detection power carrying out the multi-scale summation after the power signal is filtered, filtering the voice of the non-stationarity and the non-Gaussian effectively, filtering the power signal effectively and carrying out the precise switch event detection, the filtering method is simple, the calculation speed is high, and therefore complete the accurate decomposition of the household electrical load.

Description

technical field [0001] The invention belongs to the field of electric power, and in particular relates to a power signal filtering method for switching event detection. 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 a basis for overall planning for the power sector. At present, there are two main methods of electricity load decomposition: intrusive load decomposition and non-intrusive load decomposition. The non-intrusive load decomposition method does not need to install monitoring equipment on the internal electrical ...

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Problems solved by technology

[0003] This method needs to set a reasonable threshold for the power change value, and at the same time there are the following problems: some electrical appliances will have a large peak in the instantaneous power value at the moment of starting, that is, pulse noise (for example, the starting current of the motor is much greater than the rated current), which will cause The steady-state power change value of the electrical appliance is inaccurate, which affects the judgment of the switching event; the transient process of different household appliances is long or short (the duration and frequency of pulse noise are quite different), so the determination of the power change value becomes It is more difficult; due to the change of power quality (such as voltage sudden drop), the active power will have a sudden change, which is likely to cause misjudgment

This type of noise has a large instantaneous power and presents obvious non-stationarity and non-Gaussian characteristics. Using noise elimination equipment commonly used in the prior art cannot effectively filter the power signal, and it is difficult to accurately detect switching events

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