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A non-invasive identification method for washing machine operation based on active power fluctuation

A technology of active power and identification method, which is applied in the field of intelligent electricity consumption, can solve the problems of staying in the theoretical research stage and the non-invasive identification algorithm needs to be broken through, so as to achieve effective technical support, increase algorithm complexity, and improve identification and accuracy Effect

Active Publication Date: 2019-10-11
SOUTHEAST UNIV
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Problems solved by technology

At present, the research on NILMD technology is still in the theoretical research stage, and the non-intrusive identification algorithm of the washing machine needs to be broken through

Method used

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  • A non-invasive identification method for washing machine operation based on active power fluctuation
  • A non-invasive identification method for washing machine operation based on active power fluctuation
  • A non-invasive identification method for washing machine operation based on active power fluctuation

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Embodiment Construction

[0033] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] The present invention provides a non-invasive identification method for washing machine operation based on active power fluctuations. The identification method includes the following steps:

[0035] (1) Within a certain sampling frequency range, use a voltage sensor and a current sensor to sample the voltage and current of the total power supply line, form a voltage signal sampling sequence u and a current signal sampling sequence i, and calculate the average power sequence P; sampling The frequency range is f=0.5kHz~2kHz, and the calculation formula of the average active power sequence P is:

[0036]

[0037] Among them, s is the number of sampling points included in one voltage cycle, that is, s=f / 50, k=0, 1, ... is the starting point for calculating the average power, and t is the number of voltage cycles for calculating the avera...

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Abstract

The invention discloses a washing machine running non-intrusive identification method based on active power fluctuation. The identification method comprises the steps of sampling the voltage and currents of an inlet wire of a total power supply within a certain sampling frequency range, forming a voltage signal sampling sequence u and a current signal sampling sequence i, and calculating an average power sequence P; constructing a large window W for the average power sequence P, the large window being capable of being divided into m uniform small windows wk and each small window containing n discrete active power points; solving for the difference between the maximum value and the minimum value of the small windows wk in the large window, defining the difference as a range Dk, giving a threshold D0, and conducting statistics on the number of small windows M satisfying Dk>D0 in the large window W; if M>m / 2, defining the window as a fluctuation window; and conducting statistics on three consecutive large windows, and if two of the large windows are fluctuation windows, then determining the washing machine is running. According to the invention, the identification and accuracy of the washing machine is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of intelligent electricity consumption, and in particular relates to a non-invasive identification method for washing machine operation based on active power fluctuation. Background technique [0002] Residential power load monitoring and decomposition technology is an emerging smart grid basic support technology. Unlike the current smart meter that only measures the total power of users, it monitors and decomposes the start-up time, working status, and energy consumption of all electrical appliances in the household. As the goal, so as to achieve more reliable and accurate electric energy management. The power load monitoring and decomposition technology makes the user's electricity bill list like a telephone bill list, and the power consumption of various household appliances is clear at a glance, so that users can know their own electricity consumption in a timely manner, and provide a reasonable allocati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 周赣张亮李琦冯燕钧傅萌
Owner SOUTHEAST UNIV
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