Power quality indices of distribution feeders with unbalanced loads-measurements and analysis

This article presents a sample case of recording and analysis of power quality indices according to the EN 50160 norm in the cable and overhead distribution feeder. The analysis of active power losses due to unbalanced three phase loads is performed using simulation software. The Newton-Raphson unbalanced load flow method is used. Based on the input data from the online network power quality analyzers and distribution feeders topological data, technical losses of active and reactive power were calculated and compared with measured results and the losses in the case of balance loads. The results of the calculations are technical losses for every element of the distribution feeders. Losses in the cable and overhead distribution feeders were compared.