Abstract
Large sized electric arc furnaces (EAF) causes power quality problems such as flicker, harmonics etc. due to their unbalanced and non-linear behavior characteristics. The rapid swings in real and reactive power of such non-linear loads causes fast repetitive voltage variations with appreciable voltage distortion caused by harmonics and unbalance. Some form of reactive compensation is usually adopted to limit the disturbances caused by EAF in electric power system, in particular the flicker. This paper highlights the results of a case study, where the arc furnace is modelled using statistical dynamic model of the furnace using real time digital simulator which allows more real time simulations tests to be conducted in a shorter time and also provides a more detailed power system representation for the tests. The investigation of the simulation study results showed that static VAR compensators can be successfully used for reduction of flicker levels, compensation of reactive power and for the regulation of voltage levels in the EAF plant under study.
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