Analysis of the Effect of Distributed Generation on Power Grid

Due to the characteristics of flexible, low investment, environment friendly, and many other significant advantages, distributed power generation technologies will be used more in power systems. Distributed generation is classified from two categories of operating mode and interface mode in this paper firstly. Then, its connection manner to power grid is introduced. Finally ,combined with the theoretical analysis and the case study, the impacts of the grid-connected distributed generation on power grid such as stable characteristics, power quality and the protection, issues are analyzed, which provides theoretical support for the modification of power grid guidelines.