Abstract
Shunt Active power filters (SAPFs) are a prevalent device for improving power quality (PQ) in power systems by reducing harmonics caused by nonlinear loads. This paper developed a viable approach for improving power quality by utilizing a very promising power conversion device, namely the flying capacitor multicell inverter (FCMI). Advanced control of single-phase four-level FCMI topology operating as SAPF based on a two-loop structure is proposed. In the inner loop, the backstepping controller is adopted to compensate for the harmonic and reactive currents absorbed by the nonlinear load as well as to regulate the flying capacitors (FCs) voltages. Furthermore, since the regulation of the DC bus voltage is an important process in the control of SAPF, an adaptive neuro-fuzzy inference system (ANFIS) is proposed as an appropriate control technique to regulate the DC voltage to its optimal value in the outer loop. Lastly, the simulation results proved the effectiveness of the proposed controller in terms of tracking, regulation, and robustness.
Published Version
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