9Carr J A, Balda J C, Mantooth H A. A survey of systems to integrate distributed energy resources and energy storage on the utility grid[C]. //IEEE Energy 2030 Conference. 2008: 1-7.
10Chung Y H, Kim H J, Kim K S, et al. Power quality control center for the microgrid system[C]. //The 2nd IEEE Power and Energy Conference. 2008: 942-947.