A Novel Multilevel THSeAF-Based System for Power Quality Improvement in Smart Homes

This paper developed and tested a transformer less harmonic selective active filter (THSeAF) to improve power quality. The research highlighted that with the increasing use of nonlinear loads and rising consumer demand for reliable electricity, concrete actions should be considered for future smart grids to smoothly integrate electric vehicle chargers. A key novelty of the proposed. THSeAF is its ability to compensate a wide range of harmonic currents, thereby generally improving power quality despite specifically regulating the point of common coupling voltage. When connected to a renewable auxiliary source, the topology can actively counteract power flow, an essential capability for supplying critical loads consistently. By behaving as a high- harmonic impedance, it cleans the power system and ensures unity power factor. The theoretical modeling of the proposed configuration was investigated, with the multilevel THSeAF reducing total harmonic distortion compared to THSeAF based system in simulations. Without the usual bulky and costly series transformer, this active compensator responded properly to source voltage variations by providing a constant, distortion-free supply at load terminals while eliminating source harmonic currents.

[1].Alireza Javadi, Abdelhamid Hamadi, Auguste Ndtoungou, and Kamal Al-Haddad,” Power Quality Enhancement of Smart Households Using a Multilevel-THSeAF With a PR Controller” IEEE Transactions On Smart Grid, Vol. 8, No. 1, January 2017  [2] R. Seung-Hee, K. Dong-Hee, K. Min-Jung, K. Jong-Soo, and L. ByoungKuk, “Adjustable frequency duty-cycle hybrid control strategy for fullbridge series resonant converters in electric vehicle chargers,” IEEETrans. Ind. Electron., vol. 61, no. 10, pp. 5354–5362, Oct. 2014. [3] P. T. Staats, W. M. Grady, A. Arapostathis, and R. S. Thallam, “A statistical analysis of theeffect of electric vehicle battery charging on distribution system harmonic voltages,” IEEE Trans. Power Del., vol. 13, no. 2,pp. 640–646, Apr. 1998. [4] A. Kuperman, U. Levy, J. Goren, A. Zafransky, and A. Savernin, “Batterycharger for electric vehicle traction battery switch station,”IEEE Trans.Ind. Electron., vol. 60, no. 12, pp. 5391–5399, Dec. 2013. [5] Z. Amjadi and S. S. Williamson, “Modeling, simulation, control of anadvanced Luo converter for plug-in hybrid electric vehicle energy-storagesystem,”IEEE Trans. Veh. Technol., vol. 60, no. 1, pp. 64–75, Jan. 2011. [6] H. Akagi and K. Isozaki, “A hybrid active filter for a three-phase 12-pulsediode rectifier used as the front end of a medium-voltage motor drive,”IEEE Trans. Power Del., vol. 27, no. 1, pp. 69–77, Jan. 2012. [7] A. F. Zobaa, “Optimal multiobjective design of hybrid active power filtersconsidering a distorted environment,”IEEE Trans. Ind. Electron., vol. 61,no. 1, pp. 107–114, Jan. 2014. [8] D. Sixing, L. Jinjun, and L. Jiliang, “Hybrid cascaded H-bridge converter forharmoniccurrent compensation,”IEEE Trans. Power Electron.,vol. 28, no. 5, pp. 2170–2179, May 2013. [9] M. S. Hamad, M. I. Masoud, and B. W. Williams, “Medium-voltage12-pulse converter: Output voltage harmonic compensation using a seriesAPF,”IEEE Trans. Ind. Electron., vol. 61, no. 1, pp. 43–52, Jan. 2014. [10] J. Liu, S. Dai, Q. Chen, and K. Tao, “Modelling and industrial applicationof series hybrid active power filter,”IET Power Electron., vol. 6, no. 8,pp. 1707–1714, Sep. 2013.