Load Signature Formulation for Non-Intrusive Load Monitoring Based on Current Measurements

Aggelos S. Bouhouras, Paschalis A. Gkaidatzis, Konstantinos C. Chatzisavvas, Evangelos Panagiotou, Nikolaos Poulakis and Georgios C. Christoforidis
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Aggelos S. Bouhouras: Electrical Power Laboratory, Department of Electrical Engineering, Western Macedonia University of Applied Sciences, 50100 Kozani, Greece
Paschalis A. Gkaidatzis: Power Systems Laboratory, Department of Electrical and Computer Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
Konstantinos C. Chatzisavvas: Electrical Power Laboratory, Department of Electrical Engineering, Western Macedonia University of Applied Sciences, 50100 Kozani, Greece
Evangelos Panagiotou: Electrical Power Laboratory, Department of Electrical Engineering, Western Macedonia University of Applied Sciences, 50100 Kozani, Greece
Nikolaos Poulakis: Electrical Power Laboratory, Department of Electrical Engineering, Western Macedonia University of Applied Sciences, 50100 Kozani, Greece
Georgios C. Christoforidis: Electrical Power Laboratory, Department of Electrical Engineering, Western Macedonia University of Applied Sciences, 50100 Kozani, Greece

Energies, 2017, vol. 10, issue 4, 1-21

Abstract: In this paper we present a new methodology for the formulation of efficient load signatures towards the implementation of a near-real time Non-Intrusive Load Monitoring (NILM) approach. The purpose of this work relies on defining representative current values regarding the 1st, 3rd and 5th harmonic orders to be utilized in the load signatures formulation. A measurement setup has been developed and steady-state measurements have been performed in a Low Voltage residence. A data processing methodology is proposed aiming to depict representative current values for each harmonic order in order to keep the load signature short and simple. In addition, a simple disaggregation scheme is proposed under linear equations for the disaggregation mode in order to examine the near-real time application of the methodology. The analysis indicates that the developed load signatures could be efficient for a per second application rate of the NILM algorithm. The results show that the higher harmonic currents facilitate the identification performance. Finally, the analysis concludes that for combinations that include appliances with intense harmonic content, the phase angle of the higher for harmonic currents should also be considered to the load signatures formulation.

Keywords: NILM; load signatures; load identification; odd harmonic currents (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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