A Residential Load Electricity Identification Method Based on Current Signal Separation

A technology of current signal and identification method, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problems of identification and analysis, and achieve the effect of convenient implementation, high computing efficiency, and speeding up the identification time.

Inactive Publication Date: 2019-02-05
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 since the power consumption data of all loads are comprehensively displayed in the same signal, how to identify and analyze the individual load information from the collected overall signal has become the technical key and difficulty of this detection method

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  • A Residential Load Electricity Identification Method Based on Current Signal Separation
  • A Residential Load Electricity Identification Method Based on Current Signal Separation
  • A Residential Load Electricity Identification Method Based on Current Signal Separation

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Embodiment Construction

[0028] The specific implementation steps of the present invention will be described in detail below in conjunction with the drawings. figure 1 It is a flow chart of a residential load identification method based on circuit signal separation in the present invention. The method includes the following steps:

[0029] step 1:

[0030] figure 2 It is a schematic diagram of the input and output signals when a single electrical appliance is running. At this time, the sensor installed at the electrical inlet can directly collect the signal for analysis without separating the mixed signal. Among them, U(t) represents the voltage at both ends of the electrical appliance, that is, the household voltage provided by the power grid; I m Indicates the current generated when the electrical appliance is running alone, m=1,2,...,n; h i (t) represents the time-domain impulse response of each electrical appliance, that is, represents the electrical appliance, i=1, 2,...,n. During the use o...

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Abstract

The invention relates to the fields of intelligent electricity utilization and energy efficiency monitoring, and more particularly to a method for identifying residential load electricity utilization based on current signal separation. The method includes the steps of firstly, storing current signal data when appliances are running independently; recording existing signals in a circuit as one way of source signals I0 and storing current signal data thereof; after detecting the start of a next appliance, acquiring mixed signals and using a two-step iterative contraction threshold algorithm to recover two-way separation signal frequency domain values therefrom; and calculating a similarity coefficient between the separation signals and the frequency domain values of the stored signals, separating only two ways of signals from the acquired signals, one way of which is independent current signals of a new running load, and the other way of which is the mixed current of the previous moment, and recording the mixed signals at the moment as one way of source signals I0. According to the invention, operation conditions of each single load can be effectively separated from the mixed data when a plurality of loads run simultaneously under a non-invasive electricity data acquisition condition, and the method is an effective realization method of non-invasive load monitoring technology.

Description

technical field [0001] The invention belongs to the field of intelligent electricity consumption and energy efficiency monitoring, and in particular relates to a method for identifying residential load electricity consumption based on current signal separation. Background technique [0002] The power grid is an important public service resource. It undertakes important tasks of energy transmission, distribution and use. Therefore, the status of the power grid has a major impact on various industries in society (including the power industry itself). In order to ensure the normal operation of the power system, the fundamental requirement is to ensure the real-time supply and demand balance between power generation and load in the whole system. Therefore, one of the important factors of the operation status of the entire power grid depends on the load behavior and its power demand. It will It directly affects the reliability, security, economy and power supply quality of the sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 武昕韩笑王震
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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