DISTRIBUTED MULTI-ENERGY SYSTEMS CONSIDERING POWER-TO-X TECHNOLOGY: PLANNING, SCHEDULING, AND PERFORMANCE ASSESSMENT

The distributed multi-energy systems place emphasis on the complementary and local application of heterogeneous energy sources, and power to methanol process can be coupled, reducing carbon emissions while increasing the profitability.For providing an economical and low-carbon solution, a real community energy system integrated with solar energy and natural gas has been investigated in this work.Aimed at the minimization of the daily cost referring to the net expenditure after considering the offsetting benefits, the carbon capture, water electrolysis, and methanol synthesis are combined, with the methanol and oxygen exported as products.The capacity planning and operation scheduling have been performed, and the results indicated that the daily cost can be reduced by 69.67% compared to the conventional energy supply after the scheduling optimization.In the case scenario and typical day, the production of methanol and oxygen is 6.30 t and 13.49 t based on an electricity demand of 28.78 MWh and a heat demand of 11.85 MWh.Due to the contribution of carbon capture, the purchase of 5.90 t of carbon allowances is avoided and instead there are 3.86 t of allowances available for sale.Besides, the effect of device capacity and operating parameters on economics has been discussed.This study could help to promote the application of power to methanol in distributed energy systems.