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Residential power load identification method based on template matched filtering

A technology of template matching and recognition method, which is applied in the direction of measuring electricity, measuring electric variables, measuring current/voltage, etc., to achieve the effect of convenient implementation, high computing efficiency, and solving recognition problems

Inactive Publication Date: 2016-06-15
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

The non-intrusive method simplifies the collection and measurement mechanism, but the power consumption data of all loads are comprehensively displayed in the same signal. Therefore, analyzing and extracting individual load information from the collected overall signal is the technical key and difficulty of this method

Method used

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  • Residential power load identification method based on template matched filtering
  • Residential power load identification method based on template matched filtering
  • Residential power load identification method based on template matched filtering

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Embodiment Construction

[0019] The specific implementation steps of the present invention will be described in detail below in conjunction with the figures. figure 1 It is a flow chart of a method for identifying residential load electricity consumption based on template matching filtering in the present invention. The method includes the following steps:

[0020] Step 1: Calculate the characteristic current template of each consumer

[0021] figure 2 It is a schematic diagram of input and output signals when a single electrical appliance is running, where U(t) represents the voltage at both ends of the electrical appliance, that is, the household voltage provided by the grid; I m (t) represents the current generated when the mth electrical appliance is running alone; h m (t) represents the time-domain impulse response of the mth electrical appliance, which represents the electrical appliance. During the use of household appliances, they can be considered to be in a stable state, so the characte...

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Abstract

The invention relates to a residential power load identification method based on template matched filtering, and belongs to the intelligent power utilization and efficacy monitoring fields. The method is characterized in that a characteristic current template of each electric appliance is calculated; the frequency spectrum of the total current when multiple electric appliances work together is calculated; a threshold is selected to assign 0 and 1 to the frequency spectrum component of the characteristic current template to determine a template filter; the template filter is used to filter the frequency spectrum of the total current; and whether the electric appliance is in the working state is determined according to the reservation degree between the filtered frequency spectrum and the frequency spectrum component of the characteristic current template. Under the condition of non-invasion power utilization data collection, the using state of residential power load is effectively determined, problems in power load identification can be solved, the load type which is being operated can be distinguished from mixed data when multiple loads operate simultaneously, the operation conditions of the single loads are separated, and the method serves as an effective realization method of non-invasion load monitoring technology.

Description

technical field [0001] The invention belongs to the field of intelligent power consumption and energy efficiency monitoring, and in particular relates to a method for identifying residential load power consumption based on template matching filtering. Background technique [0002] With the development of the smart grid, the intelligence of the power distribution side is very important. A strong national grid is not enough to rely on the consolidation of UHV and EHV terminals. It is necessary to optimize the low-voltage user terminals simultaneously. Therefore, the power side Smart grid technology deserves more attention. With the increase of power consumption and non-linear power load in the power system, the problem of load state identification has attracted extensive attention of researchers in recent years. Load characteristics refer to the electrical behavior of electrical equipment during the working process, and each electrical equipment has unique characteristics in ...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R19/00G01R23/165
CPCG01R19/00G01R23/165G01R31/00
Inventor 武昕王震李阳
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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