Abstract
The aim purpose of this paper is to analyze the efficiency of active filtering equipment use for a large industrial consumer connected to the national power system. Based on data acquisition system the technological process of the consumer is identified and modeled, and then is optimized from energy consumption point of view. The compensation of power factor by reducing the consumption of reactive power and the filtering methods for current harmonics are due by using active filters. The measurements of the power quality parameters with active filter installed, being compared with the ones without filter, confirm the results of research and clearly demonstrate the effectiveness of the implemented solution. To prove the effectiveness of the investment is developed a financial and economic calculation, making a benefit and cost ratio, calculation which clearly proves the profitability of this investment.