Method and system for collecting storage medium for offshore power generation energy

A system configured to transfer, to a collection base, a storage medium that stores energy generated by a power generation float in a floating offshore wind power generation system and is loaded on the power generation float,

• the power generation float having a twin-hull structure in which two parallel hulls are detachably connected on both sides of a deck part,
• the storage medium being loaded on one of the hulls,
• the collection base including a long bank protruding from a water surface while a water channel through which the hull of the power generation float is passable is located between the long bank and a quay wall of the collection base, the deck part of the power generation float being configured to advance while straddling the long bank,
• the system comprising:
• means for detaching, from the deck part of the power generation float, the hull on at least one side of the deck part when the power generation float is moored in a state in which the deck part straddles the long bank and one of the hulls of the power generation float enters the water channel;
• means for advancing, on the long bank, the deck part from which the hull on the at least one side has been detached;
• and
• means for connecting another hull loaded with a storage medium having capacity to store energy to the side of the deck part from which the hull has been detached, wherein
• the power generation float having the other hull connected to the deck part is configured to leave the collection base.