Design considerations for contact-less underwater power delivery: a systematic review and critical analysis

Zhou Jing; Guo Kan; Chen Zhonghua; Sun Hui; Hu Sideng; Zhou Jing; Guo Kan; Chen Zhonghua; Sun Hui; Hu Sideng

doi:10.1017/wpt.2020.3

2020 Volume 7

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Design considerations for contact-less underwater power delivery: a systematic review and critical analysis

1.
College of Electrical Engineering, Zhejiang University, Hangzhou, China
2.
Polytechnic Institute, Zhejiang University, Hangzhou, China
3.
System Design Center, Hangzhou Electric Power Design Institute Co. Ltd, Hangzhou, China

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Author Bio:
Jing Zhou is an associate professor in the College of Electrical Engineering/Polytechnic Institute in Zhejiang University. Dr. Zhou obtained PhD in Imperial College London, after that she joined the Zhejiang University in 2014. Her research interest is mainly focused on wireless power transfer.

Kan Guo is a postgraduate student in Zhejiang University. His research focuses on underwater wireless power transfer system.

Zhonghua Chen is a director in the System Design Center, Hangzhou Electric Power Design Institute Co. Ltd, Hangzhou, China. His research mainly focuses on power systems.

Hui Sun is an associate professor in the College of Electrical Engineering in Zhejiang University. His research interest focuses on signal analysis and processing.

Sideng Hu is an associate professor in the College of Electrical Engineering in Zhejiang University. His research interest focuses on the highperformance driver for electric vehicles and future energy storage technology
Corresponding author: Sideng Hu, College of Electrical Engineering, Zhejiang University, Hangzhou, China. E-mail: husideng@zju.edu.cn

Wireless Power Transfer 2020, 7(1): 76-85 | Cite this article

Abstract

Wireless power transfer (WPT) has attracted attention from academia and industry in recent years. WPT has natural electrical isolation between primary and secondary side, which ensures safe charging in an underwater environment. This breakthrough technology greatly facilitates the deep-sea power transmission. However, at the current stage the transferred power and energy efficiency level are not up to that of the WPT system in the air. The major concerns include the attenuation is seawater, extreme temperature and pressure conditions, disturbance of ocean currents, and bio-security. Three questions are answered in this paper: first, the expressions of eddy current loss and attenuation of electromagnetic wave in seawater are unified, and the influence of seawater as transmission medium on the WPT system is discussed. Second, the evolution of electromagnetic coupling structure suitable for underwater applications is studied. Third, the loss and heating effects of an underwater WPT system and the corresponding bio-fouling phenomenon are investigated. The questions above were addressed through analysis of electrical properties, coupler structures, and bio-fouling effects of the underwater WPT system. This paper will facilitate the study and research on underwater WPT applications.
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Zhou J, Guo K, Chen Z, Sun H, Hu S. 2020. Design considerations for contact-less underwater power delivery: a systematic review and critical analysis. Wireless Power Transfer 7(1): 76-85 doi: 10.1017/wpt.2020.3

Zhou J, Guo K, Chen Z, Sun H, Hu S. 2020. Design considerations for contact-less underwater power delivery: a systematic review and critical analysis. Wireless Power Transfer 7(1): 76-85 doi: 10.1017/wpt.2020.3

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Design considerations for contact-less underwater power delivery: a systematic review and critical analysis

1.
College of Electrical Engineering, Zhejiang University, Hangzhou, China
2.
Polytechnic Institute, Zhejiang University, Hangzhou, China
3.
System Design Center, Hangzhou Electric Power Design Institute Co. Ltd, Hangzhou, China

Author Bio:
Jing Zhou is an associate professor in the College of Electrical Engineering/Polytechnic Institute in Zhejiang University. Dr. Zhou obtained PhD in Imperial College London, after that she joined the Zhejiang University in 2014. Her research interest is mainly focused on wireless power transfer.

Kan Guo is a postgraduate student in Zhejiang University. His research focuses on underwater wireless power transfer system.

Zhonghua Chen is a director in the System Design Center, Hangzhou Electric Power Design Institute Co. Ltd, Hangzhou, China. His research mainly focuses on power systems.

Hui Sun is an associate professor in the College of Electrical Engineering in Zhejiang University. His research interest focuses on signal analysis and processing.

Sideng Hu is an associate professor in the College of Electrical Engineering in Zhejiang University. His research interest focuses on the highperformance driver for electric vehicles and future energy storage technology
Corresponding author: Sideng Hu, College of Electrical Engineering, Zhejiang University, Hangzhou, China. E-mail: husideng@zju.edu.cn

Wireless Power Transfer 7, Article number: 10.1017/wpt.2020.3 (2020) | Cite this article

Abstract: Wireless power transfer (WPT) has attracted attention from academia and industry in recent years. WPT has natural electrical isolation between primary and secondary side, which ensures safe charging in an underwater environment. This breakthrough technology greatly facilitates the deep-sea power transmission. However, at the current stage the transferred power and energy efficiency level are not up to that of the WPT system in the air. The major concerns include the attenuation is seawater, extreme temperature and pressure conditions, disturbance of ocean currents, and bio-security. Three questions are answered in this paper: first, the expressions of eddy current loss and attenuation of electromagnetic wave in seawater are unified, and the influence of seawater as transmission medium on the WPT system is discussed. Second, the evolution of electromagnetic coupling structure suitable for underwater applications is studied. Third, the loss and heating effects of an underwater WPT system and the corresponding bio-fouling phenomenon are investigated. The questions above were addressed through analysis of electrical properties, coupler structures, and bio-fouling effects of the underwater WPT system. This paper will facilitate the study and research on underwater WPT applications.

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