Neutral-point-clamped shunt active filter
Date
2005-03
Authors
Van Greunen, Corneluis Erasmus
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : University of Stellenbosch
Abstract
This thesis presents the design and implementation of a Neutral-Point-Clamped
(NPC) shunt Active Filter (AF) for non-linear loads. A NPC shunt AF is an attractive
solution for AFs at the medium volage level, because it eliminates the need for cosly
injection transformers. The balance of the capacitors of the direct current (dc) bus of
the NPC inverter needs to maintained for stable and satisfactory operation though.
Modulation techniques and their associated balancing techniques of the NPC inverter
are analysed and discussed in the shunt AF setup. Specifically, the effect of
Power Factor (PF), harmonics and unbalance of non-linear loads are considered. The
practical design and implementation of the NPC shunt AF is presented.
Practical and simulation results are presented which validates the presented theory.
Description
Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.
Keywords
Dissertations -- Electrical and electronic engineering, Theses -- Electrical and electronic engineering, Electric power, Harmonics (Electric waves)