Abstract
This paper presents the results of harmonic analysis and harmonic filter design for a grid connected aluminum smelting plant. Harmonic analysis studies are carried out to detect the system resonance frequencies and determine individual and total harmonic voltage distortion for a wide range of possible system operating conditions including scenarios with N-1 and N-2 generation, an outage of a harmonic filter, and an outage of a rectifier transformer. A conceptual harmonic filter design procedure for the filters required for the smelting plant is presented. The suitability and robustness of the proposed harmonic filter configuration in terms of the filter's components current and voltage ratings, and corresponding r.m.s. values is investigated.
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