The neutral conductor load in the low voltage intelligent microgrids

Electric domestic appliances are part of our daily life; they improve the quality of life. Significant improvements were achieved these last years with respect to energy consumption of domestic appliances. The modern energy-efficient electric domestic appliances are electronically controlled. Generally, in a three-phase system, they represent an unbalanced and nonlinear load. Their operation may cause power quality problems in low voltage networks. Nonlinear loads draw distorted currents from supply. Different harmonics, especially the third harmonic, in phase and neutral conductors, contribute significantly to the increase of losses in distribution networks having an important contribution to an inefficient operation of line and consumes. Additionally, the network pollution may decrease the reliability of line. The conclusions discussed in this paper are sustained by a case study.