A New Multilevel Inverter Based Parallel Active Power Filter

Year 2017, Volume: 3 Issue: 4, 207 - 212, 13.12.2017

Korhan Karaarslan , Birol Arifoglu Ersoy Beser , Sabri Camur

Abstract

Developments in the field of power electronics have increased the use of
non-linear loads. The increase in the use of these loads causes power quality
to decrease and problems to appear in transmission and distribution systems.
The adverse effect of passive harmonic filters and the up-growing use of modern
sensitive loads in the production process have made active power filters an
important area of interest in eliminating current and voltage harmonics. In
this study, a multilevel inverter topology for parallel active power filter
applications has been proposed. The principle of operation for the proposed
multilevel inverter topology is explained in detail. The harmonic components of
the grid current which has a high total harmonic distortion (THD) value, are
eliminated by the proposed multilevel inverter providing a reduced number of
switching elements. The generation of switching signals for parallel active
power filter application is also expressed with generalized formulas. All
required operating states of multilevel inverter topology are given in detail
to obtain reference filter current with harmonic components. In addition, the
simulation studies carried out for different number of level modules and
different values of harmonic distortion are presented. The obtained results
show that the proposed multilevel inverter topology is suitable for parallel
active power filter applications.

Keywords

Active power filter, multilevel inverter, total harmonic distortion, power quality

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