Offshore wind turbine generator set having a compressed energy storage system

Patent metadata

Field	Value
Publication number	US-12497950-B2
Application number	US-202418669631-A
Country	US
Kind code	B2
Filing date	May 21, 2024
Priority date	May 22, 2023
Publication date	Dec 16, 2025
Grant date	Dec 16, 2025

Abstract

Provided is an offshore wind turbine generator set having a compressed energy storage system. The set includes, a wind turbine generator set, an air compressor set, an air expander set, a first motor generator, a three-in-one motor, and a combined air storage device, in which the first motor generator is alternatively connected to the wind turbine generator set or the air compressor set, the air compressor set is coaxially connected to the air expander set by means of a three-in-one motor, the combined air storage device includes a first air storage device provided in a tower barrel and a second air storage device provided on the sea, an input end of the combined air storage device is connected to the air compressor set, and an output end of the combined air storage device is connected to the air expander set.

First claim

What is claimed is:

1 . 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.

2 . The offshore wind turbine generator set having a compressed energy storage system according to claim 1 , wherein the tower barrel ( 10 ) comprises two or more tower barrel segments ( 1001 ) connected in an axial direction, the first air storage device ( 601 ) is provided in at least one of the tower barrel segments ( 1001 ), or the first air storage device ( 601 ) is at least one of the tower barrel segments ( 1001 );
or the tower barrel ( 10 ) comprises an outer barrel body ( 1002 ) and an inner barrel body ( 1003 ) which are sheathed, the first air storage device ( 601 ) is provided in a cavity between the outer barrel body ( 1002 ) and the inner barrel body ( 1003 ), or the cavity between the outer barrel body ( 1002 ) and the inner barrel body ( 1003 ) serves as the first air storage device ( 601 ).

3 . The offshore wind turbine generator set having a compressed energy storage system according to claim 2 , wherein the second air storage device ( 602 ) comprises a rigid storage tank ( 6021 ) provided under water, and the inner cavity of the rigid storage tank ( 6021 ) is in connection with the inner cavity of the first air storage device ( 601 );
or, the second air storage device ( 602 ) comprises a flexible air bag ( 6022 ), and the inner cavity of the flexible air bag ( 6022 ) is in connection with the inner cavity of the first air storage device ( 601 ).

4 . The offshore wind turbine generator set according to claim 3 , wherein the rigid storage tank ( 6021 ) is connected to a device with functions of drainage and water suction.

5 . The offshore wind turbine generator set having a compressed energy storage system according to claim 3 , wherein the flexible air bag ( 6022 ) is connected to the tower barrel ( 10 ) by means of a lifting mechanism ( 20 ), the lifting mechanism ( 20 ) comprises a first pulley block ( 2001 ) fixedly provided on the tower barrel ( 10 ), a second pulley block ( 2002 ) fixedly provided on the sea floor ( 130 ), and a rope ( 2003 ) connected between the first pulley block ( 2001 ) and the second pulley block ( 2002 ), the flexible air bag ( 6022 ) is connected to the rope ( 2003 ), and the first pulley block ( 2001 ) is connected to a second motor generator.

6 . The offshore wind turbine generator set having a compressed energy storage system according to claim 2 , wherein a buffer tank ( 30 ) is further provided in the wind turbine generator compartment ( 100 ), the buffer tank ( 30 ) is adapted to store air in a liquid state, the buffer tank ( 30 ) is in connection with the combined air storage device ( 6 ), an input end of the buffer tank ( 30 ) is connected to the air compressor set ( 2 ), and an output end of the buffer tank ( 30 ) is connected to the air expander set ( 3 ).

7 . The offshore wind turbine generator set having a compressed energy storage system according to claim 2 , wherein a common heat exchange device ( 40 ) is provided between the air compressor set ( 2 ) and the air expander set ( 3 ), the common heat exchange device ( 40 ) comprises a first heat exchange channel for circulating compressed air, a second heat exchange channel for circulating expanded air, and a third heat exchange channel for circulating a heat exchange working medium, the first heat exchange channel is connected to the energy storage pipeline, and the second heat exchange channel is connected to the energy release pipeline.

8 . The offshore wind turbine generator set having a compressed energy storage system according to claim 2 , wherein a common heat exchange device ( 40 ) is provided between the air compressor set ( 2 ) and the air expander set ( 3 ), the common heat exchange device ( 40 ) comprises a first heat exchange channel for circulating compressed air, a second heat exchange channel for circulating expanded air, and a third heat exchange channel for circulating a heat exchange working medium, the first heat exchange channel is connected to the energy storage pipeline, and the second heat exchange channel is connected to the energy release pipeline.

9 . The offshore wind turbine generator set having a compressed energy storage system according to claim 8 , wherein a plurality of offshore wind turbine generator sets are provided, and a plurality of second air storage devices ( 602 ) are provided.

10 . The offshore wind turbine generator set having a compressed energy storage system according to claim 1 , wherein a buffer tank ( 30 ) is further provided in the wind turbine generator compartment ( 100 ), the buffer tank ( 30 ) is adapted to store air in a liquid state, the buffer tank ( 30 ) is in connection with the combined air storage device ( 6 ), an input end of the buffer tank ( 30 ) is connected to the air compressor set ( 2 ), and an output end of the buffer tank ( 30 ) is connected to the air expander set ( 3 ).

Assignees

• China Three Gorges Corp
• Three Gorges Group Ind Development Beijing Co Ltd
• China Three Gorges Corp Three Gorges Group
• Ind Development Beijing Co Ltd

Inventors

• Lin Zhihua
• Xie Ningning
• Lin xinxing
• Ding Ruochen
• Zhong Geyu

Classifications

• F05B2260/422

  in the form of potential energy, e.g. pressurized or pumped fluid · CPC title

• F03D9/11 Primary

  storing electrical energy · CPC title

• F03D9/18

  storing heat · CPC title

• F03D80/00

  Details, components or accessories not provided for in groups F03D1/00 - F03D17/00 · CPC title

• F03D9/17 Primary

  storing energy in pressurised fluids · CPC title