Transaction Method for Integrated Energy System Aggregators Based on Electricity-Hydrogen Equivalent Model

The multi-energy systems has substantially enhanced energy efficiency and utilization of renewable energy, driving emphasis on coordinated operational strategies for electricity-hydrogen distribution system. Centralized and distributed optimization methods exist limitations with excessive data exchange and complex computing arising from intricate model. To solve these problems, this work develops a transaction method for integrated energy system aggregators based on the equivalence model of electricity-hydrogen distribution system, using a geometric abstraction pattern to quantify multi-energy interactive capacities. A temporal-projection methodology: Outer Cutting Plane Algorithm (OCPA) is proposed to eliminate redundant boundary iterations characteristic of conventional geometric approaches. For short-term market compliance, nonlinear gas flow dynamics are linearized through piecewise approximation. The effectiveness of the proposed method is validated through case studies based on electricity-hydrogen distribution system formed by modified IEEE 21-bus system and a modified 7-bus system in Belgium.