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Non-intrusive load event detection method in combination with time threshold

An event detection, non-intrusive technology, applied in the direction of electric power measurement through current/voltage, etc., can solve the problem of low accuracy of event detection, reduce the possibility of false alarms, improve accuracy, and avoid missed detection.

Active Publication Date: 2021-06-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The present invention mainly aims at the problem of low event detection accuracy, and provides a non-intrusive load event detection method combined with a time threshold

Method used

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  • Non-intrusive load event detection method in combination with time threshold
  • Non-intrusive load event detection method in combination with time threshold
  • Non-intrusive load event detection method in combination with time threshold

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Embodiment

[0043] This embodiment provides a non-intrusive load event detection method combined with a time threshold, and the specific steps are as follows:

[0044] (1) Collect the current at the main incoming line, the sampling rate is 6.4kHz, construct a sliding window for the collected equipment total current sequence, calculate the current intensity value once for each window, take the window size as a current cycle, that is, 128 points, calculate the current intensity sequence:

[0045]

[0046] The waveform of the current intensity is shown in figure 2 As shown in , it can be seen that the current intensity has a relatively obvious step change at the moment of the event.

[0047] (2) Calculate the difference sequence Δi of current intensity for and Δi back , image 3 for Δi for The graph of Δi back with Δi for The values ​​of are opposite to each other, respectively locating the position of rising and falling steps.

[0048] (3) take i th1 =0.5, judging Δi for and Δ...

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Abstract

The invention discloses a non-intrusive load event detection method in combination with a time threshold. The method comprises the following steps: 1, collecting the current at a total incoming line at a certain frequency, constructing a sliding window for the collected total current sequence of equipment, calculating a primary current intensity value of each window, and forming a current intensity sequence irms; 2, calculating a difference sequence [delta] ifor and [delta] iback of the current intensity values; 3, judging whether the values of the [delta] ifor and the [delta] iback are greater than a threshold value ith1 or not; 4, judging whether a current intensity value is greater than a current intensity threshold value ih2 or not when each event occurs in the sequences iup and idown; 5, judging whether the position difference [delta] t1 of two adjacent similar events is smaller than a distance threshold tth1 or not; and 6, judging whether the position difference [delta] t2 of all the opening events and closing events is smaller than a certain threshold tth2 or not. According to the invention, when all events can be detected, some false alarms are deleted, and the accuracy of event detection results is improved.

Description

technical field [0001] The invention belongs to the technical field of intelligent electricity utilization, and relates to an event detection method combined with a time threshold. Background technique [0002] Residential power load monitoring is different from the current meter that only measures the total power. It uses the power consumption information specific to each indoor power load as the monitoring object. The electric power department defines peak and valley electricity prices and energy-saving periods by obtaining information such as the electricity consumption of each load used by each user, and realizes strategic control over residents' electricity consumption. Feedback of the electricity consumption of a single load to users is helpful for users to discover hidden Reduce electricity consumption and achieve deep energy saving in a targeted manner. Electric load monitoring and decomposition using automation technology has obvious advantages over traditional man...

Claims

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Application Information

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IPC IPC(8): G01R21/06
CPCG01R21/06
Inventor 周求湛魏佳慧荣静杨桐胡继康孙明玉王聪
Owner JILIN UNIV
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