Optimal Co-Optimizing of Distributed Generation and ESS Facilities Considering Voltage Stability

Abstract

The paper deals with the optimal sizing and allocation of dispersed generation, and distributed storage systems. The optimization aims at minimizing the sum of the costs sustained by the distributor for the power losses, for network upgrading, for carrying out the reactive power service and the costs of storage and capacitor installation, over a planning period of several years. Also, analysis of the effect of distributed generation capacity and location on voltage stability enhancement of distribution networks are presented in this paper. The analysis is performed using a steady state voltage stability index which can be evaluated at each node of the distribution system. Different optimal capacities and locations are used to check this effect. The location of distributed generation has the main effect on the system voltage stability. Voltage stability should be taken into account as one of the objectives of distributed generation optimal allocation techniques. The analysis is conducted on a 69-node distribution system in order to show the feasibility of the proposed procedure.