Medium-term scheduling of the power system integrating waterway hydrogen chains considering flexibility of transferable hydrogen production equipment

• New THPE flexible operation model; considers multi-scale berthing & river level. • Pioneering multi-scale model for dynamic HV charging/storage constraints. • Integrated power system and waterway H2 chain scheduling strategy proposed. • Optimal coordination via Bertrand model for H2 sales/price interaction. • Adaptive piecewise linearization for efficient dispatching model solving. In order to fully exploit the advantages of water transportation in terms of cost and convenience, a new waterway hydrogen chain integrating the vessel-mounted transferable hydrogen production equipment (THPE), hydrogen vessel (HV), and hydrogen refueling station (HRS) is designed in this paper. The medium-term operation characteristics of the THPE which consider the long-time scale berthing position adjustment and short-time scale power regulation ability are modelled. The dynamic relationship between the hydrogen charging rate and real-time hydrogen storage of HVs is also evaluated. Additionally, the hydrogen market interaction mechanism between HRS and other hydrogen sources is formulated based on Bertrand model. On this basis, a medium-term scheduling strategy of the power system integrating waterway hydrogen chains is developed. This model is linearized into a mixed-integer linear programming (MILP) problem using an accuracy-aware adaptive piecewise linearization approximation method to improve solution efficiency. Finally, case studies on a modified IEEE-30-node power system and river network indicate that the proposed strategy can reduce the cost of the integrated electric-hydrogen system by 16,094 thousand yuan (18.2%).