As a large number of microgrids with combined cooling

heating and power(CCHP)are integrated into the same distribution network

it forms CCHP multi-microgrid system in which the distribution network is the core. When there is power interaction among multi-microgrid

it brings great challenges to the traditional optimized economic dispatch. On the basis of energy supply structure of CCHP microgrid

the cooling

heating and power energy flow among devices and equipment models are analyzed. The optimized economic dispatch model of CCHP multi-microgrid system considering the power interaction is also established. Through the example of Zhongxin district in Tianjin municipality

China

the output power of equipment and the balance of cooling

heating and power load in every CCHP microgrid are analyzed. Then it compares with economic dispatch of CCHP multi-microgrid without power interaction

about economy cost

CO2 emission and power interaction with the grid. Finally

the whole system operation cost is compared with that of the conventional CCHP system in following the thermal load(FTL)and following the electric load(FEL)operation mode

which confirms that the model proposed is effective

economic and environment-friendly. The relationship between the total cost of multi-microgrid system and electricity transaction price among microgrids is further studied.