Combined cooling and power MicroGrid system with MW class micro turbine in China

Micro turbine (MT), which is a clean, high efficiency and the best choice applied in Distribution Generation (DG) or Combined Cooling, Heating and Power (CCHP) system, has a wide application prospect in China. Aimed at the national 863 plan “The key technology and demonstration project of grid-connecting issue for a MW level CCP distributed energy MicroGrid”, this paper detailed introduces the design experience of the CCP (Combined cooling and power) MicroGrid in the aspect of grid-connecting voltage, MT type choosing, MT capacity and grid-connecting mode. Firstly the structure of CCP (Combined cooling and power) system of demonstration project is introduced; secondly, some schemes are presented in terms of design technology of MT grouping, grid structure, operation mode, protection coordination and settings. Comparisons of the schemes are analyzed in terms of advancement, feasibility, economy and reliability. Finally, design frame of MicroGrid Energy Management System (MEMS) is put forward to guarantee the high efficiency and advancement of CCP system running.