Defining optimal DG penetration for minimizing energy losses concerning repairing fault periods

The rapid increase of distributed generations (DGs) has many benefits for distribution systems and could result in some negative effects. Identifying the optimum locations and sizes for these units increases the benefits and limits the negative effects. Many researches tried to define the optimal DG siting and sizing. Either normal operation or faulty conditions have been considered in this process. In this paper, repairing fault periods (RFP) in loop distribution systems is considered in the optimization process. Comprehensive comparisons between results of considering only normal operating periods (NOP) and those considering both NOP and RFP are introduced. The main aim of the proposed methodology is to minimize the energy loss. An actual 15-bus loop distribution system is implemented to represent the case study. Genetic Algorithm (GA) technique is used for solving the objective function. The results show significant effect for RFP on the optimization results. Thus, considering both NOP and RFP is essential for optimal sizing and siting of DG in loop distribution systems.