Incorporating Multi-Energy Industrial Parks Into Power System Operations: A High-Dimensional Flexible Region Method

Multi-energy industrial parks (MIP) could provide great flexibility through multi-energy substitution and production scheduling adjustability. For the requirements of efficiency and privacy preservation, hierarchical coordinated dispatch methods based on flexible regions have been proposed to incorporate MIPs’ flexibility into power system operations. However, the inherent time-coupling characteristics of MIPs’ flexibility can hinder the application of existing methods to multi-period system scheduling problems. To address this, this paper proposes a coordinated optimal dispatch framework for the integration of MIPs’ flexibility based on high-dimensional flexible regions. Each dimension of the formulated region represents the adjustability of power exchanges in individual time slots. The formulated regions are constructed considering detailed operations of the production process and district energy supply systems, which can preserve critical time-coupling information of the production process within a production shift. On this basis, the power system can interact with MIPs in a non-iterative way and devise day-ahead multi-period optimal dispatch plans. To mitigate the numerical complexity of constructing high-dimensional flexible regions, an effective calculation method based on the Quickhull algorithm is proposed. Case studies from real-world power systems and industrial parks illustrate the benefits of the coordination and the efficiency of the proposed framework compared to centralized ones.