1. Zhoushan Power Supply Company of State Grid Zhejiang Electric Power Company, Zhoushan, China
2. Zhejiang Zhoushan Marine Power Research Institute Co., Ltd, Zhoushan, China
3. Shandong Provincial Key Laboratory of Ocean Engineering, Ocean University of China, Qingdao, China
4. Qingdao National Engineering Laboratory for Subsea Equipment Test and Detection Technology, Qingdao, China