Study of Loss Reduction and Network Planning of a High Proportion Distributed Generation System

Abstract

In order to realize a “double carbon” goal, it is necessary to further conserve energy and reduce emissions on the power grid. The high proportion of distributed generation dramatically impacts the power system network loss. Distributed generation connected to the distribution network is dependent on its location and capacity. In this work, distributed generation location and capacity are optimized by considering investment and operation costs, active power loss, and voltage security. Based on the particle swarm optimization algorithm, the 9-bus system is optimized and analyzed. It is found that (1) for the radial distribution network system, the closer the access location of the distributed generation is to the end of the load, the smaller the line loss of the system; (2) with the increase of DG load capacity ratio, the overall network loss of the system will first decrease and then increase. Furthermore, the IEEE standard 33 bus distribution network system is further optimized and simulated in this study. It is demonstrated that the proposed method reduces network losses and improves voltage quality.