Evaluating the effect of considering repairing-fault periods on calculating technical losses in medium-voltage feeders of ring distribution networks

Abstract

Energy losses represent one of the main challenges for electric power distribution utilities all over the world. Several papers presented different methods for estimating technical losses (TLs) in distribution networks. Due to load variation during normal operation, load factor (LF) and loss factor (LSF) coefficients are considered. In this paper, the effect of repairing fault periods (RFPs) on calculating the TLs for medium voltage feeders of ring distribution network is presented. For emphasizing this effect, comparisons between TLs calculation considering only normal operation period (NOP) and considering both NOP and RFP are introduced. A proposed factor is suggested to be inserted into equations of TLs calculation to express the effect of RFPs. A proposed formula is introduced to calculate the new factor depending on repairing fault hours over the year. An actual ring distribution network in Egypt is chosen for evaluating the proposed study according to real data and measurements.