Harmonic elimination of electric arc furnaces by active power filters and their stability analysis

Three different active power filter (APF) configurations are developed for harmonic elimination of a three‐phase electric arc furnace (EAF). Three single‐phase APF, a three‐wire APF and a four‐wire APF are developed for this purpose. A predictive control method of the APFs based on dynamic programming method is applied and the results of the simulation studies are compared. Finally the stability of the system is analyzed and its global asymptotic stability is shown.