Optimal placement of different DG units type in distribution networks based on voltage stability maximization and minimization of power losses

In recent years, distributed generation units became attractive due to its technical, economic and environmental benefits. This paper dealt with the optimal placement and sizing of DG units in radial distribution networks. For this purpose, three kinds of this latest have been employed (injection of active power, injection of reactive power and injection of both powers together). Then, a new optimization technique known as: Bat Algorithm is employed using the Total Active Power Losses as a performance index. Investigation was carried out on the standard 33, 69 buses test feeders. Simulation results demonstrate the effectiveness and the robustness of the proposed methodology. Obtained results are compared with recently published work.