Coordinated optimization of IES in electrolytic aluminum industrial park considering hybrid CSP-CCHP system, demand response, and CCER-carbon trading

The optimization of integrated energy systems (IES) in electrolytic aluminum industrial parks (EAIPs) is critical for advancing low-carbon transitions in this industry. In this paper, with the objective of minimizing the total operation cost of the park, an optimal scheduling model of IES in the EAIP is proposed, which considers the participation of the electrolytic aluminum load (EAL) in demand response (DR) and Chinese certified emission reduction (CCER)-carbon trading. Firstly, the IES takes hybrid concentrated solar power (CSP) and combined cooling, heating and power (CCHP) systems as the main energy sources, which can utilize the steam generated by CSP to drive the turbine of CCHP and allow the boiler of CCHP to assist in heating the molten salt in CSP. Then, EAL is integrated into the DR adjustment scope based on its operational characteristics. Finally, the EAIP is included in the carbon trading market that integrates CCER transactions, allowing it to gain economic benefits through the CCER-carbon trading. Gurobi calculation results show that, compared with the baseline scenario, the proposed strategy reduces total IES operating costs by 4.92% and increases renewable energy consumption by 1.91%, effectively lowering operating costs while promoting clean energy consumption.