This paper researches microgrid technology scheme with micro turbines. First， the cold and electric supply systemsare introduced. Then， the technical issues of micro turbine grouping， grid structure， operation mode， protection coordinationand settings are researched. The alternative technical schemes are analyzed and compared with respect to their technicaladvancement， feasibility， economics and reliability， and the final scheme is put forward. Finally， some advices about systemprotection configuration and settings are given， and the operating mode of the recommendatory scheme is introduced in detail.The research results show that the recommended design scheme can meet the requirements of the microgrid and is easy to beimplemented. By the proposed scheme， power supply reliability of the whole system can be improved.