Cost analysis of Rural Distribution Systems with three phase and single phase tap lines

Rural Distribution Systems (RDSs) are expanding abruptly day by day. With this continuous expansion, the distribution loss is increasing deliberately as a coherent parameter. Constructing single phase HT (high tension) line, it becomes more alarming with respect to loss as well as system management. This paper highlights the advantages of three phase tap lines for the reduction in line loss compared to single phase. A cost analysis is carried out by designing all HT lines of RDSs with three phase taps instead of single phase taps and the obtained result is compared with the single phase tap line. Then, an optimum length of single phase tap line is determined using simplex method for linear programming considering the cost of three phase tap line as a standard. The results show that more area can be electrified using three phase tap lines compared to the single phase tap line with the same cost.