Energy Efficiency Study for the Distribution System Using Low Voltage Transformer Under Harmonic Conditions

  • Bruno M. Laurindo Universidade Federal Fluminense
  • Felipe Marins Universidade Federal Fluminense
  • Bruno Wanderley França Universidade Federal Fluminense
  • Marcio Zamboti Fortes Universidade Federal Fluminense
  • Mauricio Aredes Universidade Federal do Rio de Janeiro
Keywords: Transformers, Power distribution, Energy loss, Operating temperature, Energy efficiency


In Brazil, technical energy losses in power distribution systems are determined by power flow studies considering medium and low voltage systems, according to ANEEL recommendations, presented in PRODIST Module 7. These technical losses occur due to physical phenomena and are intrinsically associated with the energy distribution process. However, standards currently do not consider energy losses from harmonic components generated by nonlinear loads, which represent almost all the loads present in electrical systems worldwide. Thus, this paper aims to analyze the operation of a low voltage transformer under harmonic current conditions and to evaluate not only the operation temperature of the equipment, but also to verify the energy losses in it. This test is performed on a laboratory platform and the results are experimental using an adjustable three-phase source and a 3kVA three-phase transformer.