Offshore wind turbine generator set having a compressed energy storage system

An offshore wind turbine generator set having a compressed energy storage system, comprising a wind turbine generator set (1), an air compressor set (2), an air expander set (3), a first motor generator (4), and a motor (5) which are provided in a wind turbine generator compartment (100), and a combined air storage device (6) provided outside the wind turbine generator compartment (100), wherein

• the first motor generator (4) has a first input shaft and a first output shaft, the first input shaft is connected to the wind turbine generator set (1) by means of a first clutch (7), and the first output shaft is connected to the air compressor set (2);
• the air compressor set (2) and the air expander set (3) are coaxially connected by means of the motor (5), the motor (5) comprises a second output shaft and a second input shaft, the second output shaft is connected to the air compressor set (2) by means of a second clutch (8), and the second input shaft is connected to the air expander set (3) by means of a third clutch (9);
• the combined air storage device (6) comprises a first air storage device (601) provided in a tower barrel (10) and a second air storage device (602) provided on the sea, the inner cavity of the first air storage device (601) is in connection with the inner cavity of the second air storage device (602), an input end of the combined air storage device (6) is connected to the air compressor set (2), and an output end of the combined air storage device (6) is connected to the air expander set (3);
• and the first motor generator (4) and the motor (5) are both electrically connected to a power grid, the air compressor set (2) is connected to the input end of the combined air storage device (6) by means of an energy storage pipeline, and the air expander set (3) is connected to the output end of the combined air storage device (6) by a pipeline.