A regional integrated energy system based on solar

geothermal and natural gas is constructed to meet the multi-load demands of buildings

electric vehicles and hydrogen fuel vehicles. Hydrogen storage tank and heat storage tank are used to adjust the system flexibility

and to achieve systematic low-carbon economic operation on the basis of meeting the energy demand. Taking the residential community as an example

the distinctions of travel behavior for new energy vehicles on weekday and weekend are investigated

the change of travel frequency with different seasons are also considered

and the yearly loads of residential and new energy vehicles are determined.Primary energy saving rate

CO_2 emission reduction ratio and total annual expenditure reduction ratio of the proposed system are set as optimization objectives

and the capacity configuration of integrated system is optimized based on the mixed integer linear programming so as to evaluate the system performances from the aspects of economy

energy and environment. The results show that

primary energy saving rate

CO_2 emission reduction ratio

total annual expenditure reduction ratio and total investment income of the optimized system are 42.95%

55.89%

50.82% and 49.18%. In the integrated system

the input power of public grid only accounts for 16.93% of the total power load. This study provides theoretical basis for the integration of novel energy supply system considering coupling loads of residential building and new energy vehicles

which is helpful to promote the application of integrated energy system in building and transportation areas.