Paper Title
Implementation of FCS-MPC Strategy in Shunt Active Power Filter for Power Quality Enhancement

Abstract
Modern power networks face rising harmonic distortion caused by nonlinear loads, and sudden changes in load within low-voltage systems make control increasingly challenging, and traditional PI controllers often struggle to respond effectively to these rapid dynamics. To address these issues, propose a Predictive Controlled Shunt Active Power Filter (SAPF), designed specifically for harmonic suppression. It builds on Finite Control Set Model Predictive Control (FCS-MPC), which directly applies switching states to the converter, eliminating the need for modulation and simplifying implementation. FCS-MPC offers high dynamic performance, supports multivariable control, and allows constraints and nonlinearities in the model. The proposed controller, validated through MATLAB simulations, demonstrates real-time adaptability to sudden load variations while effectively restoring source current balance and preserving sinusoidal waveform quality under unbalanced conditions. MATLAB simulations confirm the effective suppression of harmonic currents from nonlinear loads, reducing Total Harmonic Distortion (THD) from 26.29% and 17.4% to 1.38% and 3.10%, respectively, which is well within the IEEE 519 standards. The proposed FCS-MPC–controlled SAPF effectively mitigates harmonics under varying nonlinear load conditions, demonstrating both dynamic responsiveness and real-time adaptability. Keywords - FCS-MPC, Harmonic, Nonlinear Load, Predictive Control, SAPF