**5. Conclusions**

This paper presents a deterministic approach, using percentage THD to identify load consumption patterns through EDLIFFT with a 4MSW in the NI-LabVIEW program, for various combinations of loads in real time, and demonstrates that the percentage THD value effectively identifies various load combinations. The proposed method for the non-intrusive identification of the load pattern is essential for responsible electricity consumption, as it contributes to raising awareness about the quality of electricity, encourages countries/companies to use harmonic-free devices and calls for policy changes to promote harmonic-free appliances (compensation at the source) so the grid can become free of harmonics. Harmonics contribute 20% more than the real consumption billed to the consumer, which can be reduced to help with the cost of energy for utilities, leading to better margins, which are otherwise considered as losses. Utilities and consumers also benefit from the increased lifetime of their equipment and appliances, respectively. Our DR chart highlights the change in power and the change in percentage THD, then the customer acts on the DR management system's recommendations. Standard deviation, a measure of the dispersion of values, indicates the differentiation of load patterns without ambiguity. Since both percentage THD against all possible combinations of loads are measured and put into a lookup table and recommendations are also chosen in advance, the performance of DR is fairly good for real-time DR management from a PQ perspective.

**Author Contributions:** Conceptualization, H.P.D.; formal analysis, H.P.D. and S.B.G.; investigation, H.P.D. and S.B.G.; methodology, H.P.D.; project administration, H.P.D.; resources, V.S.S.S.S.D.; supervision, V.S.S.S.S.D. and S.B.G.; validation, H.P.D. and V.S.S.S.S.D.; writing—original draft, H.P.D.; writing—review and editing, V.S.S.S.S.D. and S.B.G. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** The authors gratefully acknowledge the Department of Electrical Engineering, National Institute of Technology, Warangal, for their support.

**Conflicts of Interest:** The authors declare no conflict of interest.
