Optimal location of distributed generation for loss minimization in distribution system

Abstract

Accurate loss minimization is the critical component for efficient electrical power flow. The introduction of distributed generation (DG) in networks is bound to have significant effect in network losses. Such dispersed generators can reduce distribution system loss by appropriate allocation. With the integration of DG into an existing utility, Line Loss reduction can be achieved. In order to demonstrate system loss minimization, distributed generator units (DGs) of trans-Amadi gas turbine and Omoku gas turbine generators were selected and sparsely located into the low-voltage buses (11kv) of the existing distribution substations near electrical consumers in the sampled Port Harcourt transmission/distribution network fed by Afam power station. A proposed line loss reduction index (LLRI) was implemented on the ten-bus test system using MATLAB 7.5 software. The sample system used to test the programme produced a reduction in line losses of 19MW. The minimum values of LLRI is 0.8323 and 0.8326 which correspond to the optimal DG location scenario in terms of line loss reduction.