Optimal Planning of Type-1DGs in EV Incorporated Radial Distribution Network

Abstract

A vital task for effective operation of distribution system is reducing power losses and to save energy. One of the most effective methods to reduce losses is distributed generation (DG). The proper planning of EVCSs is a significant problem for distribution system operators as the installation of Electric Vehicle Charging Stations (EVCSs) for Electrical Vehicles (EVs) increases on a larger scale. Power losses and generation-demand mismatch rise with EV load adoption in the electrical grid. As a result, there will be impact on voltage levels and the voltage stability margin deteriorates. It is critical to integrate EVCSs at appropriate locations to reduce the negative effects of increasing EV load penetration on Radial Distribution Systems (RDS). The integration of EVs into distribution systems undergoes charging and discharging modes of operation for power exchange with the grid, resulting in energy management. Inadequate EVCS planning has a negative influence on the distribution system, causing voltage variation and an increase in power losses. DG units are integrated with EVCSs to reduce this. The DGs help to keep the voltage profile within limits which reduces power flows and losses and thus results in improved power quality and reliability. Therefore, the DGs and EVCS should be properly allocated and sized to avoid issues such as protection, voltage rise, and reverse power flow. This research demonstrates an approach for minimizing losses in an EV-integrated radial distribution system by optimizing the location and sizing of DGs. This study proposes the sizing and location of renewable (wind, solar) DG units (type-1 DG) incorporated in radial distribution network. This methodology decreases power losses while simultaneously improving network voltages. The accuracy of the proposed method is elaborated in four scenarios. The proposed methodology is implemented in IEEE 33 bus and 69 bus systems using the Particle Swarm Optimization technique (PSO). The results show that the suggested optimization technique increases system efficiency and performance by optimizing the planning and operation of both DGs and EVs.