Abstract
In this work, we represent a shunt active power filter (SAPF) based on a serial three-phase flying capacitor multilevel inverter (FCMI) controlled by a Petri Nets representation (PNs). This structure is chosen for its significant performances. In fact, the use of the FCMI within the SAPF makes it possible to increase the apparent switching frequency of the structure in order to reduce the value then the volume and weight of the inductance of the output filter. Besides, the FCMI allows the synthesis of a high-voltage signal using low-voltage semiconductor components. Therefore, improving the reliability of this structure leads to the improvement of the dynamics of the SAPF. This paper deals with a new control methodology based on PNs to regulate the flying capacitor voltages and the reference currents issued by the instantaneous active and reactive power theory. Compared to a conventional SAPF composed by a classical two-level inverter and controlled by a simple PWM control, simulation results demonstrate that our proposed control enhances the dynamic system and the power quality by reducing the total harmonic distortion (THD) satisfying the limits of IEEE standards.
Highlights
In recent years, the field of power electronics has seen a notable development mainly due to industrial applications using electrical systems [1,2,3]
Compared to a conventional shunt active power filter (SAPF) composed by a classical two-level inverter and controlled by a simple Pulse Width Modulation (PWM) control, simulation results demonstrate that our proposed control enhances the dynamic system and the power quality by reducing the total harmonic distortion (THD) satisfying the limits of IEEE standards
The test is performed with a sample time equal to 10 μs taking into account a delay time of 18 μs in order to fix the minimum ON and OFF times of the power semiconductors
Summary
The field of power electronics has seen a notable development mainly due to industrial applications using electrical systems [1,2,3]. Any load based on power electronics devices has a so-called “nonlinear” behavior [4] because they create significant disturbances which degrade the optimal functioning of the installation and its overall efficiency, this causes current deformation and creates additional losses and heating in the electrical equipments. In this context, three-phase nonlinear loads [5] lead, on the one hand, to a regular increase in the harmonic rate by producing harmonic currents whose frequencies are integer multiples of the fundamental frequency. Several studies of SAPFs based on conventional inverters having a switching frequency between 12 and
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