A new method to theoretically calculate circulating current of sheath of extra-high voltage submarine cables

作者：Du, Zhao-Bin^*; Yang, Ze-Ming; Chen, Jun; Qiu, You-Qiang; Liang, Jing-Cheng; Niu, Hai-Qing

来源：Journal of South China University of Technology(Natural Science Edition), 2013, 41(12): 63-69.

DOI：10.3969/j.issn.1000-565X.2013.12.011

• Circulating current
• Extra high voltage
• Inductive electromotive force
• Mathematical formulas
• PSCAD/EMTDC simulations
• Sheath
• Structure characteristic
• Theoretical calculations

Due to the existence of remarkable current leakage in extra-high voltage submarine cables, the traditio-nal methods to calculate the induced current of cable sheath cannot be utilized directly. In this paper, according to the structure characteristics and grounding mode of the extra-high voltage submarine cables of Hainan Interline Project, a new method to theoretically calculate the circulating current of sheath, which takes into consideration the spatial axial current distribution of long submarine core, is proposed, and the mathematical formula of the inductive electromotive force of sheath-armor layer of the cable is deduced based on the electromagnetic field theory and the circuit laws. The results of both the on-site test and the PSCAD/EMTDC simulation demonstrate that the proposed method is feasible and effective, and that it may serve as an applicable method for the theoretical loss analysis of submarine cables.

• 出版日期2013
• 单位华南理工大学; 南方电网科学研究院有限责任公司