An analytical method for DG placements considering reliability improvements

The values of distributed generator (DG) are very dependent on its location as it was installed in distribution feeders as well as its type and size. In order to enhance the reliability and obtain the benefits for DG placement, an analytical method for DG placements considering reliability improvements is proposed in this paper. The proposed method tries to solve the optimal DG placement from the viewpoint of achieving the maximal benefits of DG. At the same time, it also sets out a method to evaluate the reliability of distributed network with DG, and then make the use of linear interpolation to achieve the customer interruption cost. Test results have shown that with proper installation site selection, DG can be used to improve service reliability, reduce the customer interruption costs and save the power cost. The most important is that the electric utilities can often obtain the maximal economical benefits.