An uninterruptible power supply system and control method for offshore wind power

By introducing compressed air energy storage and supercapacitor energy storage devices into offshore wind turbines, combined with switching and control devices, the problems of short lifespan and performance degradation of lead-acid batteries have been solved, achieving efficient power supply and improved reliability of the power system, and reducing operation and maintenance costs.

CN115642687BActive Publication Date: 2026-05-26SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI POWER EQUIPMENT RESEARCH INSTITUTE CO LTD
Filing Date
2022-11-04
Publication Date
2026-05-26

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Abstract

This invention discloses an uninterruptible power supply (UPS) system and control method for offshore wind power. The system includes a compressed air energy storage device, a supercapacitor energy storage device, a switchgear, and a control device. The supercapacitor energy storage device includes a bidirectional converter and a supercapacitor. The compressed air energy storage device is connected to the wind turbine and the switchgear. The bidirectional converter is connected between the supercapacitor and the switchgear. The switchgear is connected to the wind turbine and is used to control the compressed air energy storage device to supply power to the wind turbine or the supercapacitor, and also to control the power transmission between the wind turbine and the supercapacitor. The control device controls the operation of the compressed air energy storage device, the bidirectional converter, and the switchgear. This system achieves a rational and efficient configuration between the battery capacity and load power supply time of the UPS system, improving the service life and overall reliability of the UPS system, and reducing safety risks and maintenance costs.
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