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Technical and economic demands of HVDC submarine cable technology for Global Energy Interconnection

2020-07-26

Technical and economic demands of HVDC submarine cable technology for Global Energy Interconnection

面向全球能源互联网的高压直流海缆的经济性研究

Xiaoling Zhao¹, Yao Liu ^1*, Jiawei Wu¹, Jinyu Xiao¹, Jinming Hou¹, Jinghui Gao², Lisheng Zhong²

（1.Global Energy Interconnection Development and Cooperation Organization, No. 8 Xuanwumennei Street, Beijing 100031, P.R. China 2.State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, P.R.China）

Abstract

Power transmission across the sea is an important part of global energy interconnection (GEI). To support the construction of GEI and to serve the needs of future clean energy trans-sea transportation and offshore wind power development, this study a) analyzes the requirements of the GEI backbone network pertaining to direct current (DC) submarine cable technology, and b) defines the key technical and economic indices of ultrahigh-voltage direct current (UHVDC) submarine cable based on theoretical computations. The research is based on the thermoelectric coupling model and the finite element method. It is shown that the dielectric strength of the insulating materials of the ±800 kV~±1100 kV/ 4000 MW~12000 MW UHVDC submarine cable (extrusion insulation) should be not less than 43~65 kV/mm, while the heat resistance is not less than 110 °C. As the cost of submarine cable is 5~10 times higher than that of the overhead line, the project investment need to be decreased to a level within the economical carrying capacity to guarantee extensive applicability of the HVDC submarine cable technology.

Keywords

UHVDC submarine cable, GEI, Technical index, Economic index.

Fig.1 Pathway and depth of submarine transmission line between Oman and India

Fig.2 Pathway and depth of submarine transmission line between Iceland and UK

Fig.3 Oversea power transmission route and sea depth of Greenland-Canada section

Fig.4 Pathway and depth of submarine line between Lyon, France, and Walgra in Algeria

Fig.5 Operating characteristics of cable laid in seawater

本文引文信息

Zhao X, Liu Y, Wu J, Xiao J, Hou J, Gao J, Zhong L (2020) Technical and economic demands of HVDC submarine cable technology for Global Energy Interconnection. Global Energy Interconnection, 3(2): 120-127

赵小令，刘耀，吴佳玮，肖晋宇，侯金鸣，高景辉，钟立生 (2020) 面向全球能源互联网的高压直流海缆技术技术经济性需求研究. 全球能源互联网（英文），3(2): 120-127

Biographies

Xiaoling Zhao

received her bachelor’s degree from the Wuhan University, Wuhan, in 2013, and her Ph.D. degree from Shanghai Jiao Tong University, Shanghai, in 2018. She is currently working in GEIDCO, Beijing. Her research interests include high-voltage insulation, GIS, and submarine cable technology.

Yao Liu

received his bachelor’s degree from the North China Electric Power University, Beijing, 2006 and his master’s degree from the China Electric Power Research Institute, Beijing, 2009. He is working in GEIDCO, Beijing. His research interests include HVDC transmission, electric system simulations, and new transmission technology.

Jiawei Wu

received her Ph.D. degree in Electrical Engineering from Xi’an Jiao Tong University in 2018. She is working in GEIDCO, Beijing. Her research interests include pulse power technology and VSC- HVDC technology.

Jinyu Xiao

received her Ph.D. degree in Electrical Engineering from Tsinghua University, in 2005 . He is working in GEIDCO, Beijing. His research interests include electrical system planning and new clean energy technologies.

Jinming Hou

received his bachelor’s degree in Electrical Engineering from the North China Electric Power University in 2002 and her Master’s degree in Electrical Engineering from North China Electric Power University in 2006. He is working in GEIDCO, Beijing. His research interests include power system and automation.

Jinghui Gao

received his Ph.D. degree in Electrical Engineering from Xi’an Jiao Tong University in 2012. He is working in Xi’an Jiao Tong University, Xi’an. His research interests include functional dielectrics and their applications in cable technology, dielectric and energy storage, and bioelectromagnetic effect.

Lisheng Zhong

received the Ph.D. degree in Electrical Engineering from Xi’an Jiao Tong University, in 1997. He is working in Xi’an Jiao Tong University, Xi’an. His research interests include dielectric and electrical insulation, cable technology, and bio- dielectrics.

编辑：周舟

审核：王伟