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Non-intrusive load identification method based on Fourier transform using non-intrusive load identification device

A technology of Fourier transform and load identification, applied in measuring devices, measuring electrical variables, spectral analysis/Fourier analysis, etc., can solve the problems of missing valuable information, limited practical application, and high hardware dependence , to achieve the effect of small error, safe and stable operation, and high precision

Active Publication Date: 2022-04-08
上海逐鲨智能科技有限公司 +2
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AI Technical Summary

Problems solved by technology

However, the higher frequency of adoption results in higher costs and higher dependence on hardware, resulting in limited practical applications.
On the contrary, if the sampling frequency and window function are set low, it will cause a lot of valuable information to be missed in the calculation results.

Method used

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  • Non-intrusive load identification method based on Fourier transform using non-intrusive load identification device
  • Non-intrusive load identification method based on Fourier transform using non-intrusive load identification device
  • Non-intrusive load identification method based on Fourier transform using non-intrusive load identification device

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0052] Such as figure 2 As shown, a non-intrusive load identification method based on Fourier transform using a non-intrusive load identification device, including current and voltage sampling circuits, acquisition modules, microprocessor units, data storage units, display modules, communication modules and power management module; the current and voltage sampling circuit is used to measure the current and voltage intensity, that is, the total current and voltage ...

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Abstract

The invention discloses a non-intrusive load identification device and method based on Fourier transform. By judging the change of instantaneous power, analyzing the input and removal of load, and using the variation of load to calculate the feature quantity extraction when the load is input , use the instantaneous power after load removal to calculate the feature quantity extraction after load removal; the present invention uses discrete fractional Fourier transform algorithm to extract the load feature vector, and defines the key parameters required for the transformation, and combines the load feature vector with the feature library The eigenvalues ​​are matched in terms of amplitude and phase angle. When the error is less than the tolerance range, the feedback is matched; when there is no match in the feature library, the eigenvector will be saved as a new load feature and a notification will be issued; Compared with the traditional non-intrusive load identification algorithm, this algorithm has the characteristics of high precision and small error.

Description

technical field [0001] The invention belongs to the technical field of non-invasive load identification, and in particular relates to a sub-item measurement technology capable of realizing load identification. Background technique [0002] Load identification is the key technology to realize smart grid and load-grid interaction. With the rapid development of smart grid, load identification technology has received very high attention. [0003] Load identification is the key factor to realize sub-item metering, efficient energy utilization and flexible energy management and control system, especially with the rapid development of new energy and electric vehicles, how to achieve efficient energy utilization and flexible energy management and control system has become a global key issues faced. [0004] A large number of new energy sources are connected to the power grid, especially new energy power stations based on photovoltaic and wind power, especially distributed new ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R19/25G01R23/16
CPCG01R31/00G01R19/25G01R19/2513G01R23/16
Inventor 曾繁鹏卢云伟乔德利
Owner 上海逐鲨智能科技有限公司
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