Modified DC Load Flow Based Optimal DG Installations with Fast Feeder Reconfiguration

With proper installation of distributed generation (DG), the performances of distribution grid, such as system loss, power quality and reliability, can be improved effectively. In this paper, the particle swarm optimization (PSO) based solution procedure, including the simplified load flow and the proposed modified DC load flow models, is used to solve for the optimal DG installation problem with the proposed fast feeder reconfiguration procedure. The computing efficiency is increased with the load flow fast estimated by the simplified load flow model and the tie switches to open to make a radial feeder structure selected based on the modified DC load flow model. Numerical results indicate that the proposed method can efficiently make a suitable feeder structure with a small system loss and a big DG penetration level.