Abroad, offshore wind power has been widely developed in Europe, and wind power operation and maintenance ports and ships constitute the main facilities and equipment for offshore wind power operation and maintenance. They are at the forefront of wind power operation and maintenance.

Against the dual background of China's "dual carbon" goals and the construction of a new power system, the wind power industry has entered a fast lane of rapid development, and offshore wind power operation and maintenance are in the initial stage.

At present, the main power of domestic wind farms is 5-6MW, and the 6MW wind turbines are shut down for one day. Calculated at 0.85 yuan/kW, the loss is 120000 yuan/day. Construction of wind turbines above 10MW will begin next year, with a maximum capacity of 15MW. The demand for operation and maintenance ships is gradually increasing, and small fishing boats will inevitably be eliminated in the future.

The existing types of operation and maintenance ships include ordinary operation and maintenance ships, professional operation and maintenance ships, and operation and maintenance mother ships.

A availability estimation model was established based on environmental conditions, the speed of the operation and maintenance ship, the adaptability of the operation and maintenance ship to the environment, the number of units, unit performance, and operation and maintenance capacity. The relevant data of a certain offshore wind farm was calculated using this model.

It can be seen from this that when the annual failure frequency of a single unit exceeds 5 times, the utilization rate of using a regular operation and maintenance ship is less than 95%; If a professional operation and maintenance ship is used, the utilization rate can exceed 96% when a single unit has 5 annual failures. When a single unit has 3 annual failures, the utilization rate can reach 98%.

The operation and maintenance mother ship is equipped with active wave compensation piers and other equipment, which can facilitate personnel or equipment transportation and wind farm maintenance operations under harsh sea conditions. Small wind power operation and maintenance ships can be equipped with multifunctional hydraulic high-altitude elevators to safely, quickly, and efficiently transport personnel and materials, and can compensate on different axes to absorb waves.