Application of the battery energy storage in wave energy conversion system

The output power of the Wave Energy Conversion (WEC) system, such as AWS, varies, which may not satisfy the requirements of the grid code for the integration of wave generation into power grids. To deal with this issue, in this paper the Battery Energy Storage (BES) is applied to smooth the output power of the WEC. The BES is integrated to the converters of the WEC, and the controllers for the battery energy storage systems and the back-to-back converters of WEC are designed, respectively. The power quality of the wave farm (WF) using BES is tested, and the effectiveness of the controllers proposed is demonstrated under the system disturbances.