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Non-intrusive identification method and device for multi-state electric appliance

An identification method, a non-invasive technology, applied in the direction of electrical devices, measuring devices, instruments, etc., can solve the problems of dwelling, multi-state load decomposition and identification accuracy to be broken through, and achieve the effect of simple and reliable principle

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Problems solved by technology

However, the current research on NILMD technology is still at the stage of theoretical research and preliminary practice, especially the accuracy of polymorphic load decomposition identification needs to be broken through

Method used

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  • Non-intrusive identification method and device for multi-state electric appliance
  • Non-intrusive identification method and device for multi-state electric appliance
  • Non-intrusive identification method and device for multi-state electric appliance

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Embodiment 1

[0072] Such as figure 2 As shown, the present invention discloses a non-invasive identification method for multi-state electrical appliances, and the specific process steps are as follows:

[0073] (1) Take the sampling frequency fs=6400Hz, use the current sensor and the voltage sensor to sample the voltage and current of the total power supply line, and form the voltage signal sampling sequence u(k) and the current signal sampling sequence i(k), k is the sampling point number.

[0074](2) Take the calculation time window m=5 power frequency cycles, the number of sampling points included in one power frequency cycle N=128, and calculate the real-time average active power sequence P(n) and reactive power sequence Q at the incoming line of the total power supply (n), perform fast Fourier decomposition on the current sequence, and calculate the second, third, and fifth harmonic current sequence i at the incoming line of the total power supply 2 (n), i 3 (n), i 5 (n), where ...

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Abstract

The invention discloses a non-intrusive identification method and device for a multi-state electric appliance, and the method comprises the steps: detecting whether a switching event occurs, if Delta P(n) is greater than 120W, judging that the power is raised, recording the raising moment to be ton(n), calculating the raising value of active power as Delta Pup, the raising value of reactive power as Delta Qup, the transient current impact multiple as I'rate, and the change values of second, third and fifth harmonic currents as Delta i2, Delta i3 and Delta i5, and going to step (4) to start a classification algorithm; and if Delta P(n) is less than -120W, judging that the power drops, recording the drop time as toff(n), calculating the drop value Delta Pdown of the active power, the drop value Delta Qdown of the reactive power and the change values Delta i2, Delta i3 and Delta i5 of the second, third and fifth harmonic currents, and entering the step (5) to turn off the matching algorithm. According to the invention, the operation and the state of the multi-state electrical appliance can be accurately sensed, and technical support is provided for realizing non-intrusive identification of the multi-state electrical appliance.

Description

technical field [0001] The invention relates to a non-invasive identification method and device for multi-state electrical appliances, belonging to the technical field of intelligent electricity utilization. Background technique [0002] With the improvement of the living standards of urban residents in my country, residents' electricity consumption presents the characteristics of rapid growth in electricity consumption, complex electricity consumption behavior, high comprehensive energy consumption, and weak interaction with the power grid. Therefore, it is of great practical significance to carry out friendly interaction between the supply and demand of residential users, guide scientific and rational electricity consumption, reduce the peak-valley difference of the power grid, and promote energy conservation and emission reduction. Electricity consumption behavior perception technology is the basic supporting technology for the friendly interaction between supply and deman...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R21/00G06F30/20
CPCG01R31/00G01R21/002G01R21/003G06F30/20
Inventor 李琦熊剑许金宇王冠男全巧艳舒畅菅利彬魏巍吴戈张扬