Multi Objective Allocation of Distributed Generations and Capacitor Banks in Simultaneous

This paper has developed a novel multiobjective function for optimal sizing and sitting ofDistributed Generation (DG) units and capacitor banks in simultaneous mode to improve reliabilityand reduce energy losses. The proposed function consists of four objectives: Cost of Energy NotSupplied (CENS), System Average Interruption Duration Index (SAIDI), costs of energy loss andinvestment. A novel structure has been suggested for Differential Evolutionary Algorithm (DEA) tosolve this nonlinear complex problem and its results compared with related values of geneticalgorithm and simple DEA. In addition to the novel objective function, the other contribution of thiswork is proposing a new model for load and energy cost. Three types of DGs, i.e., wind turbine,solar cell and diesel generator have been employed in placement process. To verify thecomprehensiveness of the proposed function, three scenarios have been introduced: Scenario i)First, placement of DGs, then capacitor banks, Scenario ii) First, placement of capacitor banks,and then DGs, and Scenario iii) simultaneous placement of DGs and capacitor banks. Simulationshave been carried out on one part of practical distribution network in Metropolitan Tabriz in NorthWest of Iran. The results of simulations have been discussed and analyzed by using of the five novelindices. The obtained simulation results using proposed function shows that the simultaneousplacement of distributed generations and capacitor banks results in more reduction of the energylosses, and increase improvements of reliability indices as well as voltage profile.