Equilibrium Allocation Method of Hydrogen Energy Storage for Improving Resilience of Island Distribution Network

Island distribution networks (DNs) have low resilience given their specific geographic location and power supply mode, making it difficult to maintain uninterrupted power supply to important loads in extreme scenarios. They also struggle with issues including source load mismatch, wasted renewable energy, and heavy environmental loads. Hydrogen energy storage (HES) configurations effectively solve these problems, but there are insufficient algorithms for accurately characterizing the HES's emergency power supply capability for resilience enhancement. Its allocation models that account for extreme island situations' uncertainty are also under-studied. This paper proposes an equilibrium allocation model of HES to fully exploit HES's emergency power supply capability for supporting island DNs subject to significant uncertainty of extreme scenarios and high demand for resilience enhancement. A model of HES's emergency power supply capability was built considering both the analysis of HES's operating strategy in extreme scenarios and the level of importance of loads. The uncertainty of extreme island scenarios was addressed by developing a joint data-mechanismdriven failure probability model and Monte Carlo sampling processing. The equilibrium allocation model for island DNs was then created from a planning perspective. This is to balance island DNs' resilience in extreme scenarios and their economy of operating in normal scenarios based on the Nash bargaining model. The effectiveness of the proposed HES equilibrium allocation model was verified through simulation tests, and the results indicate that considering emergency power supply capability can improve the resilience and economics of HES allocation.