Neutral-point-clamped shunt active filter

Van Greunen, Corneluis Erasmus (2005-03)

Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2005.

Thesis

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.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/2994
This item appears in the following collections: