Abstract
The problem of controlling three-phase series active power filter (TPSAPF) is addressed in this paper in presence of the perturbations in the voltages of the electrical supply network. The control objective of the TPSAPF is twofold: (i) compensation of all voltage perturbations (voltage harmonics, voltage unbalance and voltage sags), (ii) regulation of the DC bus voltage of the inverter. A controller formed by two nonlinear regulators is designed, using the Backstepping technique, to provide the above compensation. The regulation of the DC bus voltage of the inverter is ensured by the use of a diode bridge rectifier which its output is in parallel with the DC bus capacitor. The Analysis of controller performances is illustrated by numerical simulation in Matlab/Simulink environment.
Highlights
The harmonic contamination is a harmful problem in Electric Power System
The three-phase series active power filter (TPSAPF)’s are an appropriate solution to protect the sensitive load against voltage perturbations
To force the voltages xsd and xsq in order to respectively follow the references x*sd and x*sq, a controller formed by two nonlinear regulators, using the Backstepping technique [6], is proposed in the follow: Step 1
Summary
The increasing use of rectifiers, thyristor power converters, UPS (Uninterruptible Power Supply), switching power supplies and other nonlinear loads are known to cause serious problems in electric power systems. These devices are responsible for the contamination of the line currents with the harmonics of various orders. The regulation of DC bus voltage of the inverter is provided by the use of a diode bridge rectifier which its output is connected in parallel with the DC bus capacitor This theoretical result is confirmed by numerical simulation.
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