Optimal Placement and Sizing of Distributed Generation and Shunt Capacitors in Distribution Networks

Currently, electric power companies place significant emphasis on the optimal placement and sizing of Distributed Generation (DG) units and Shunt Capacitors (SC) in radial distribution networks. In this study, the Reconfiguration Method (RM) is employed to determine optimal locations for a single DG unit and a single SC. Additionally, the Loss Sensitivity Factor (LSF) technique is applied to identify suitable installation sites for multiple DG units and SCs within the distribution network. The Grey Wolf Optimizer (GWO) and Ant Lion Optimizer (ALO) algorithms are utilized to determine the optimal sizes of the DG and SC units. The main objective of this work is to minimize active power losses in the distribution network, enhance voltage profiles, and improve the voltage stability index through optimal DG/SC placement and sizing, subject to equality and inequality constraints. An IEEE 33-bus radial distribution system was used to evaluate the proposed algorithms. The simulation and analysis of various scenarios showed that integrating DG units and SCs significantly reduces power losses and improves voltage profiles across all buses of the network.

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