Non intrusive load monitoring: analytic expressions as load signature

Abstract

Since 1992 (G. W. Hart [5]) the researchers started to take interest (focus) in developing a link between energetic signatures and household devices. In the ideal case, the main objective of the signature is to uniquely identify a device. One important characteristic of the signature is to be as compact as possible. In the present context, this paper proposes to use analytic expressions in form of transcendent function as signature for devices from the same consumption category: laptop, LCD-TV, washing machine, air conditioner. The paper presents a method to determine a signature based on the tangent function and genetic algorithm. Two case studies are shown. They will prove that it is possible to obtain an individual signature for household devices, and separate them from a common consumption.