Abstract-Power quality is of increasing concern to utilities and their customer alike. Many loads connected to electric power systems can cause power quality problems at all voltage levels and for very different power ratings due to their unbalanced and non-linear behaviour characteristics.This paper describes the aspects of power quality at the point of common coupling (PCC) where an arc furnace for steel melting with alternating current is connected. By measurements of flicker, harmonics content in voltage and current, active and reactive power and power factor, the preservation of the reference levels for the supply voltage and emission limits for the furnace as a customer are evaluated.The evaluation of the power quality of contemporary International and Argentinian standards is given.The different phases in the operation of the arc furnace are described in detail and illustrated with measurements, and a complete single phase equivalent circuit for the arc furnace is obtained from field tests.

Abstract-Many loads connected to electric power systems can cause power quality problems at all voltage levels and for very different power ratings due to their unbalanced and non-linear behavior characteristics.This paper describes the aspects of power quality at the point of common coupling (PCC) where an arc furnace for steel melting with alternating current is connected. By measurements of Flicker, harmonics content in voltage and current, active and reactive power and power factor, the preservation of the reference levels for the supply voltage and emission limits for the furnace as a customer are evaluated.The evaluation of power quality of contemporary International and Argentinian standards is given.The different phases in the operation of the arc furnace are described in detail and illustrated with measurements.

Abstract-The electricity distribution service in the Buenos Aires metropolitan area of Argentina, which was privatized in the early nineties, is carried out by three different Utilities and the control is performed by a Regulatory Agency (ENRE).By the time this control began, the existing limits in IEC standards for Power Quality were adopted in order to obtain a starting point for the local regulation. In addition, the equipment employed to perform the measurements also meets IEC standards.The aspects of Power Quality which are regulated, and therefore controlled, are voltage magnitude, voltage disturbances -harmonic distortion and flicker -, and long-term interruptions -3 minutes or longer duration -. In every site in which the limits established for Power Quality are exceeded, the Utility is penalized.The aim of the article is to show the results obtained over more than 10 years of permanent control. The carried out studies mainly consisted of processing the data collected since the beginning of the control in order to obtain: disturbance trends over the years, comparisons of the levels measured in different Utilities as well as disturbance behaviors throughout the day. In addition to this, the degree of fulfillment achieved by the Utilities is also assessed.

No abstract

No abstract