Low-carbon Economic Operation of the Integrated Energy System Considering Carbon Capture Unit Coupling with Power to Gas

As an essential element of the integrated energy system (IES), the output of coal-fired units still occupies a high proportion in the power system, resulting in high CO2 emissions. This paper proposes to transform the coal-fired unit into a carbon capture power plant (CCPP) and combined the power-to-gas (P2G) device to form the model of integrated energy system containing CCPP-P2G. Take the minimum of the operation cost and carbon trading cost as the objective function. The nonlinear part of the model is piecewise linearized and the example is solved with the CPLEX solver. Finally, the comprehensive cost, carbon emissions and wind consumption of the system in three scenes are compared and analyzed, the impact on the operational stability of the natural gas network is further studied as well. The simulation results verify the effectiveness of the proposed model.