Voltage profile improvement with distributed generation

Recent changes in the energy industry initiated by deregulation have accelerated the introduction of distributed generation at the subtransmission and distribution levels. In light of the well-known benefits as well as the various issues involved in DG incorporation, this paper proposes two new quadratic voltage profile improvement indices (VPII/sub 1/ and VPII/sub 2/). The primal-dual interior-point (PDIP) method has been employed to identify the optimal location and real and reactive power generation on the basis of the newly proposed indices. A simplified model of a 33-bus radial distribution system has been simulated in MATLAB to illustrate the use of the new indices.