Research on source-load coordinated optimization of Rural Integrated Energy System considering complementary use of biogas, wind and solar energy

In order to solve the problems of unreasonable energy structure and low utilization efficiency in rural areas, a Rural Integrated Energy System (RIES) with complementary utilization of biogas, wind and solar energy has been constructed. To optimize the low-carbon economic dispatch of RIES, a source-load coordinated optimization method is proposed. Firstly, a multi-energy Integrated Demand Response (IDR) model based on time-of-use electricity price and time-varying biogas cost is established on the demand side. Secondly, P2G devices are added on the supply side to optimize the coupling relationship between electricity and gas in the system and increase wind power output space. Then, considering the actual carbon emissions of gas load and the Layered carbon trading mechanism, a carbon trading model for PIES is established. Finally, the optimal dispatch model is constructed with the objective function of minimizing the sum of energy cost, wind curtailment cost, IDR cost and carbon emissions cost, and the problem is converted into a mixed integer linear problem and solved by CPLEX. The results of the analysis of four scenarios show that after introducing IDR, the total operating cost of the system decreased by 12.42%. On this basis, considering P2G, the wind power absorption rate increased by 11.54% and the total operating cost decreased by 5.02%. The simulation results verify the effectiveness and reliability of the proposed scheme in this paper.