As the yearly electric energy demand grows, there is a significant increase in the penetration of distributed generation (DG) to fulfil this increase in demand. This book presents a methodology using Differential Evolution for the placement of DG units in electrical distribution systems to reduce power losses and to improve the voltage profile. The distributed generation (DG) sources are added to the network to mainly reduce the power losses by supplying a net amount of power. In order to minimize the line losses of power systems, it is equally important to define the size and location of...