Power load switching point detection method and device

Abstract

The invention discloses a power load switching point detection method and device. The method comprises the steps of obtaining first electric quantity data, and carrying out the normalization processing of the first electric quantity data, and obtaining second electric quantity data, performing N-layer discrete wavelet transform calculation on the second electric quantity data to obtain a suspected switching point, wherein N is a positive integer, when the load type of the first electric quantity data is unknown, inputting the suspected switching point into a load switching point identification model, so that the load switching point identification model identifies the suspected switching point to obtain an identification result, and judging whether the suspected switching point is a power load switching point or not according to an identification result. By adopting the embodiment of the invention, the accuracy of detecting the switching point of the household appliance can be improved.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a detection method and device for switching points of electric loads. Background technique [0002] The non-intrusive switching detection method of household appliances refers to: by installing a load monitoring device on the electrical bus and collecting electrical signals at the incoming line end, the detection and positioning of the start-stop action of each household appliance load is realized. [0003] Existing home appliance switching detection methods, in the face of mixed switching of a large number of household appliances in real life, often cause a large number of noise points to be misjudged as actual switching points due to problems such as large electrical noise and harmonic pollution; When switching on and off of household appliances with large difference in start-stop characteristics and power, if the threshold value is set too high, when the electrical sig...

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Problems solved by technology

[0003] Existing home appliance switching detection methods, in the face of mixed switching of a large number of household appliances in real life, often cause a large number of noise points to be misjudged as actual switching points due to problems such as large electrical noise and harmonic pollution; When switching on and off of household appliances with large difference in start-stop characteristics and power, if the threshold value is set too high, when the electrical signal of high-power household appliances fluctuates normally, it will often be judged as switching action of low-power household appliances. The switching action of small-power home appliances will be regarded as noise and filtered out, resulting in missed and false detections

[0004] To sum up, the existing detection methods for switching points of household appliances cannot accurately distinguish between actual switching points and noise points, and the detection accuracy of load switching points is not high.

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