To　address　the　issues　of　optimizing　the　operation　of　island　electric-hydrogen　coupled　systems　and　high　curtailment　rates,　a　dispatch　optimization　strategy　considering　refined　hydrogen　energy　modeling　is　proposed.　The　article　analyzes　the　operational　characteristics　and　electrolysis　efficiency　of　alkaline　electrolyzers　and　develops　a　refined　model,　balancing　the　economic　and　reliability　aspects　of　the　integrated　energy　system.　An　island　integrated　energy　dispatch　operation　model　is　established.　Case　study　results　show　that,　compared　to　traditional　electrolyzer　models,　the　proposed　model　effectively　reduces　the　number　of　start-stop　cycles,　extends　the　lifespan　of　the　electrolyzer　array,　and　enhances　system　economics.　©　2025　IEEE.