VI waveform feature extraction method oriented to user power consumption behavior perception analysis

A waveform characteristic, user-oriented technology, applied in the recognition of patterns in signals, complex mathematical operations, instruments, etc., can solve the problems of inability to distinguish between variable-speed drives, poor anti-interference ability, poor versatility, etc., to achieve good economic benefits and Practical value, high accuracy and fast speed

Pending Publication Date: 2021-03-26
NINGBO POWER SUPPLY COMPANY STATE GRID ZHEJIANG ELECTRIC POWER +2
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Problems solved by technology

Extracting instantaneous power as characteristic data has strong robustness, but it is not suitable for permanent operating loads and continuously changing loads; extracting voltage noise as characteristic data has poor anti-interference ability and poor versatility; extracting harmonics as characteristic data cannot be used for variable speed Driven loads are further differentiated

Method used

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  • VI waveform feature extraction method oriented to user power consumption behavior perception analysis
  • VI waveform feature extraction method oriented to user power consumption behavior perception analysis
  • VI waveform feature extraction method oriented to user power consumption behavior perception analysis

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Embodiment Construction

[0050] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] Such as figure 1 Shown, the present invention comprises the following steps:

[0052] 1) Acquisition of total electricity load data;

[0053] Use the wave recorder to collect the voltage and current data of a single electrical appliance, and obtain the drawn VI trajectory curve;

[0054] 2) Data preprocessing;

[0055] Data preprocessing includes standardization of current and voltage; standardization of current and voltage is achieved by dividing the current and voltage signals by their root mean squares respectively; the standardized current and voltage data are plotted with the voltage as the abscissa axis and the current as the ordinate axis to draw the current Voltage V-I trajectory curve;

[0056] The current and voltage normalized calculation formula is:

[0057]

[0058] v norm(n) =v n / V rms (1≤n≤N) (2)

[0...

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Abstract

The invention discloses a VI waveform feature extraction method for user power consumption behavior perception analysis, and relates to the field of power grid operation and maintenance. At present, aiming at a power consumption behavior feature extraction technology at home and abroad, starting from the perspective of load features, universality is poor, harmonic waves are extracted to serve as feature data, and variable speed drive type loads cannot be further distinguished. A current and voltage trajectory curve is collected; the closed area, the average curve distortion degree and the curve self-intersection point number of a trajectory curve are considered; five characteristics of a current and voltage trajectory curve, the slope of a near zero point of the middle section of an average curve and the clockwise or anticlockwise average curvature of a VI trajectory are considered, and mathematical mode feature extraction is carried out, thus obtaining a feature data set of user behavior perception analysis. The invention is high in feature extraction speed and easy to implement, multiple features jointly participate in user behavior perception, and the accuracy is high. The method can provide data support for user load identification, and has good economic benefit and practical value.

Description

technical field [0001] The invention relates to the field of power grid operation and maintenance, in particular to a VI waveform feature extraction method oriented to perception and analysis of user electricity consumption behavior. Background technique [0002] With the continuous improvement of social ecological civilization awareness, people's attention to energy consumption is also increasing, and users' demand for power supply quality continues to increase. Traditional extensive management can no longer meet home users' needs for intelligent and lean power supply. , Smart electricity usage has become an inevitable trend. Smart electricity consumption is one of the important links in the construction of smart grids and the core of the interactive service system. Its key technologies are mainly reflected in advanced metering infrastructure (AMI) standards, systems and terminal technologies, and user electricity behavior perception analysis technology. As one of the most...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F17/11G06F17/18
CPCG06F17/11G06F17/18G06F2218/10G06F2218/12
Inventor 贺民邬程欢崔幼
Owner NINGBO POWER SUPPLY COMPANY STATE GRID ZHEJIANG ELECTRIC POWER
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