Abstract—This paper presents harmonics mitigation using a dSPACE based solution of a series active filter in a neutral conductor for a three-phase-four-wire distribution system. Due to the various types of load including nonlinear loads connected to 3P4W distribution systems, the zero sequence current of the harmonic component therefore flows in the neutral conductor. This zero sequence leads to overburden of the neutral conductor and the distribution transformer. This paper proposes a high performance control technique in a series active filter which is an advanced technology controller. This hardware is highly accurate and supports the easy development of future research. The control system in this paper reduces the harmonic current in the neutral and phase conductors during both balanced and unbalanced load conditions. It is envisaged that the proposed mitigation method not only improves power factor but also balances the asymmetrical loads. However, the active filter operation will not affect the fundamental component due to the unbalanced load in which the size of a neutral conductor is determined. A detailed analysis of a dSPACE based series active filter is performed and the simulation results based on MATLAB Simulink are reported. The results show that the proposed mitigation technique can eliminate current harmonics overload in both the neutral conductor and the distribution transformer by employing only one active filter installation set.
Index Terms—dSPACE, series active filter, harmonics mitigation, neutral conductor.
Satitpol Khuttiyaboot and Nopbhorn Leeprechanon are with the Department of Electrical and Computer Engineering, Thammasat University, Patumthani, 12120 Thailand (e-mail: stitpol_tu@hotmail.com, corresponding author: nopbhorn@engr.tu.ac.th).
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Cite:Satitpol Khuttiyaboot and Nopbhorn Leeprechanon, "dSPACE Based Series Active Filter for Harmonics Mitigation in a Neutral Conductor for 3P4W Distribution System," Journal of Clean Energy Technologies vol. 2, no. 4, pp. 343-348, 2014.
