Optimal scheduling of the electrolytic aluminium industrial park participating in flexible ramp products

The integration of renewable energy sources (RES) into the power system has surged, posing significant challenges due to their inherent volatility and unpredictability. This paper examines the economic feasibility of electrolytic aluminium indust rial parks (EAIPs) participating in flexible ramping products (FRP) to enhance power system flexibility and improve economic benefits. We model the EAIP as a whole, detailing the flexible adjustment capabilities of electrolytic aluminium load (EAL) and establishing a two-stage operation model comprising Day-ahead (DA) and intraday planning. The DA model minimizes daily operational costs by determining electricity purchases and FRP participation based on forecast information, while the intraday model flexibly adjusts load power to accommodate real-time fluctuations in RES generation and FRP prices. The case study demonstrates that EAIPs can effectively reduce energy market purchase costs and increase FRP market revenue through power adjustment capabilities. Compared to operating without considering power regulation or FRP, the total expenditure in the case that includes both is reduced by 1.0%. The results highlight the potential of EAIPs to contribute to grid flexibility and economic efficiency in the context of RES penetration.