TITLE:
Control of an Active Filter by Duty Cycle Modulation (DCM) for the Harmonic Decontamination of a Three-Phase Electrical Network
AUTHORS:
Théodore Patrice Nna Nna, Salomé Ndjakomo Essiane, Stève Pérabi Ngoffé
KEYWORDS:
PWM, DCM, Active Filter, Inverter
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.8 No.7,
July
30,
2020
ABSTRACT: This paper presents the control of the active filter
by Duty Cycle Modulation (DCM) for the harmonic pollution control of a
three-phase electrical system. Several research works have preceded this work,
but most of them deal with the control by pulse-width modulation and the
differences lie around the THD reduction performance, the quality of the wave
obtained, the simplicity of the scheme and the cost of the control. For this
purpose, we propose a very innovative approach to active filter control which
aims at reducing the current THD at a lower rate than pulse-width modulation
techniques improving at the same time the wave quality with a more simplified
control scheme. First we present the schematic diagram of the active filter,
then we present the design of the control of this active filter based on the
real and imaginary instantaneous power method which uses the algebraic “Clark”
transformation. The Duty Cycle Modulation controller is used to obtain the
required control commands to be injected to the inverter. We then developed a
simulink model of the active filter to validate this study. The simulations
were performed in the Matlab/Simulink environment. The results obtained show a
significant improvement on the harmonic current control techniques for the THD
of 1.02% which was 26.25%, the elimination of noise in the signal and the
simplicity of the control with an easier implementation than the pulse width
modulation (PWM) make the Duty Cycle Modulation (DCM) control a very promising
tool.