Hybrid filter operation during nonlinear load current pulsations

Examines some basic aspects of hybrid filters, operating effectively when current pulsations of a non-linear variable load occur. The operation of two hybrid filter systems, each equipped with an active power filter, working as: a) a controlled additional current source, b) a controlled additional v...

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Bibliographic Details
Published in:Compel 1997-03, Vol.16 (1), p.38-48
Main Authors: Fracckowiak, Leszek, Strzelecki, Ryszard
Format: Article
Language:English
Subjects:
Algorithms
Circuits
Computer engineering
Electric circuits
Electrical engineering
Electricity
Filter design
Influence
Load
Methods
Studies
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Summary:Examines some basic aspects of hybrid filters, operating effectively when current pulsations of a non-linear variable load occur. The operation of two hybrid filter systems, each equipped with an active power filter, working as: a) a controlled additional current source, b) a controlled additional voltage source, recognized by the authors in previous publications as the most advantageous solution has been examined. For both systems, vectorial equations in , co-ordinates, describing their operation, have been presented. On the basis of these equations a common frequency model of three-phase three-wire hybrid filters has been elaborated. This model has been used for the evaluation of the filtration efficiency of line current harmonics, taking into consideration the applied methods and algorithms to separate filtered harmonics, above all at a pulsating load current. Some conclusions from the theoretical analysis have been verified by simulation of a line loaded by converter with an output current pulsating at frequencies 10 and 20Hz.
ISSN:0332-1649
2054-5606
DOI:10.1108/03321649710163752