Non-invasive load identification method and non-invasive load identification device

Abstract

The invention discloses a non-invasive load identification method and device. The method comprises the steps of finding out a transient stage of a time sequence according to an obtained time sequenceat a power supply inlet, wherein the time sequence comprises an active power time sequence, a reactive power time sequence and a current time sequence; extracting load identification characteristic quantities at the transient stage according to the electric energy data at the power supply inlet, wherein the electric energy data include voltage, current and power, and the load identification characteristic quantities include steady-state power increment, active power characteristics, harmonic current increment and load time characteristics; and determining a load type according to the load identification characteristic quantities and a preset load library, wherein the preset load library has a corresponding relationship between the load identification characteristic quantities and the loadtype. According to the invention, the technical problems of limited steady-state characteristics and relatively low identification accuracy under the condition of complex actual working conditions ofexisting non-intrusive load identification are solved.

Description

technical field [0001] The present application relates to the field of power systems, in particular to a non-intrusive load identification method and device. Background technique [0002] Non-intrusive load monitoring (Non Intrusive Load Monitoring, NILM) is to use the measuring equipment installed at the power entrance to measure the voltage, current and other signals at the entrance, and use the algorithm to decompose and obtain the user's electricity consumption behavior. In recent years, with the overall development of science and technology and economy, household loads have become more intelligent and complex, and high-power electrical appliances have emerged in an endless stream. Residential loads have an increasing impact on the peak-valley difference of the power grid. Therefore, the requirements for smart power technology are getting higher and higher The increasingly stringent conditions make the residents' load monitoring face more serious challenges. [0003] Th...

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Problems solved by technology

[0004] This application provides a non-invasive load identification method and device, which are used to solve the technical problems of limited steady-state characteristics of existing non-invasive load identification and low identification accuracy under complex actual working conditions

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