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Non-intrusive load identification device and method based on Fourier transform

A Fourier transform, non-intrusive technology, applied in the field of non-intrusive load identification, can solve the problems of missing valuable information, limited practical application, high hardware dependence, etc., to achieve small error, safe and stable operation, high precision effect

Active Publication Date: 2021-06-08
上海逐鲨智能科技有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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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] like figure 2 As shown, a non-intrusive load identification device based on Fourier transform, including current and voltage sampling circuit, acquisition module, microprocessor unit, data storage unit, display module, communication module and power management module; current and voltage The sampling circuit is used to measure the current and voltage intensity, that is, the total current and voltage data at the measurement port; the measured analog data is ...

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Abstract

The invention discloses a non-intrusive load identification device and method based on Fourier transform, and the method comprises the steps: judging the change of instantaneous power, analyzing the input and removal of a load, calculating the feature quantity extraction of the load when the load is input through the variable quantity of the load, and calculating the feature quantity extraction of the load after the load is removed through the instantaneous power after the load is removed. According to the method, a discrete fractional order Fourier transform algorithm is adopted to extract a load feature vector, key parameters required by transform are defined, the load feature vector and feature values of a feature library are subjected to amplitude and phase angle matching, and when an error is smaller than a tolerance range, matching is fed back; when the feature library is not matched, the feature vector is stored as a new load feature, and a notification is sent out; and compared with a traditional non-intrusive load recognition algorithm, the algorithm has the advantages of being high in precision and small in 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 Applications(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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