Study of sheath circulating current and loss-reducing of 500kV long-distance submarine cables

Author

Zhaobin Du ; Qing Xiao ; Jun Chen ; Youqiang Qiu ; Jingcheng Liang ; Yao Zhang

Author_Institution

Coll. of Electr. Eng., South China Univ. of Technol., Guangzhou, China

fYear

2013

fDate

8-11 Dec. 2013

Firstpage

1

Lastpage

5

Abstract

Considering large charging capacitors and grounding feature of 500kV long-distance single-core oil-filled submarine cables, a new calculating method on circulation currents of sheath is proposed based on electromagnetic field theory and circuit laws. With the distributed parameter model of the wire core, the influence of current distribution along core wire and capacitance current on sheath circulation current is analyzed. The cable sheath losses can also be calculated conveniently. The results from on-site test demonstrate the feasibility and effectiveness of the proposed method. Further by analyzing the influence of the structural parameters and operating conditions of submarine cables on cable loss, multi-point grounding of sheath and reactive power flow optimization would be suggested as two effective loss-reducing measures for such kind of projects.

Keywords

cable sheathing; load flow; oil filled cables; optimisation; reactive power; submarine cables; cable loss; cable sheath losses; capacitance current; charging capacitors; circuit laws; core wire; current distribution; distributed parameter model; electromagnetic field theory; grounding feature; long-distance single-core oil-filled submarine cables; loss-reducing measures; multipoint grounding; operating conditions; reactive power flow optimization; sheath circulating current; structural parameters; voltage 500 kV; wire core; Cable shielding; Capacitance; Grounding; Loss measurement; Power cables; Underwater cables; Wires; circulating current of sheath; extra-high voltage submarine cable; loss-reducing measures; sheaths bonded at both ends;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2013 IEEE PES Asia-Pacific

Conference_Location

Kowloon

Type

conf

DOI

10.1109/APPEEC.2013.6837276

Filename

6837276