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A non-intrusive electrical load identification and promotion method under steady-state conditions

A non-invasive technology for electric loads, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of phase shifting or phase inversion of current signals, achieve the effect of overcoming the influence and improving the comprehensive recognition rate

Active Publication Date: 2020-10-23
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to provide a non-intrusive electrical load identification and promotion method under steady-state conditions, which is used to solve the problem of determining the "M-domain "It will cause the problem of phase shift or phase inversion of the current signal

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  • A non-intrusive electrical load identification and promotion method under steady-state conditions
  • A non-intrusive electrical load identification and promotion method under steady-state conditions
  • A non-intrusive electrical load identification and promotion method under steady-state conditions

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Embodiment 1

[0030] A non-intrusive electrical load identification and promotion method under steady-state working conditions, comprising:

[0031] Step S100: After the working state of the electrical equipment is stable, record the voltage signal and current signal of the same time axis, the preferred time is 200ms;

[0032] Step S200: Find the lowest point V of this voltage signal low and the highest point V high , find the zero-crossing point V 0 =(V low +V high ) / 2, such as figure 1 shown;

[0033] Step S300: Make the following judgment on the amplitude of the voltage signal according to time sequence:

[0034] When satisfying V d-1 0 and V d >=V 0 hour,

[0035] if and hour,

[0036] Then V d After zero point, denoted as V start , V start The corresponding time point is T start , time point T start The corresponding current signal is I start , where the size of α is the offset of the dithering process, determined according to the computing power, you can define α=...

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Abstract

The invention discloses a non-intrusive power load identification lifting method under steady-state conditions. The method comprises the steps of: recording voltage signals and current signals of onesection of the same time axis after the working state of a device to be consumed in power is stable; finding out the lowest point Vlow and the highest point Vhigh of the voltage signals to obtain thezero crossing V0=(Vlow+Vhigh) / 2; finding Vstart, Istart, Vend and Iend for the amplitude of the voltage signals according to the time sequence; and in the sampling period by taking the Istart and theIend as starting points, establishing an M-domain matrix. When the non-intrusive power load identification lifting method selects the extreme high point and the extreme low point of the current valuein the sampling period to determine the M domain, the phase alignment method is employed to fin the optimal starting point of the sampling period so as to overcome the influence of the selection deviation of the starting point on the subsequent algorithm.

Description

technical field [0001] The invention relates to the technical field of non-intrusive electric load monitoring, in particular to a non-intrusive electric load identification and promotion method under steady-state working conditions. Background technique [0002] The traditional intrusive power load monitoring system needs to install sensors in front of each load, the overall cost is high, the construction is very complicated, and it also causes damage to the original line. The non-intrusive power load monitoring NILM system only needs to install a sensor at the main switch of the household entrance line or on the bus of the industrial workshop to know the usage of each / type of electrical appliances, and the cost is low, the construction is convenient, and there is no harm to the user. Electric interference is expected to develop into the core technology of a new generation of smart meters, which will bring many benefits to power users and the whole society. The non-intrusiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 宋佶聪明爽余志斌何金辉瞿杏元
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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