Heat Transfer Process of HVDC Submarine Cables under Transient Load

doi:10.11930/j.issn.1004-9649.202003213

Abstract

Abstract: High-voltage direct current (HVDC) XLPE submarine cable is an important carrier for long-distance and large-capacity power transmission. The HVDC submarine cable load affects temperature distribution, while the temperature has an important influence on the conductivity and electric field strength distribution characteristics of HVDC XLPE insulation. Compared to the steady-state load conditions, the heat transfer process of HVDC submarine cables under transient load conditions is more complicated. In order to study the heat transfer process of HVDC submarine cables under transient load, this paper establishes a thermal field finite element model, and simulates the heat transfer process of HVDC submarine cables under the working conditions from zero load to full load and then to zero load. In the meantime, a test platform is set up to conduct contrast studies. The results show that the simulation results are in good agreement with the test ones, and the simulation model is suitable for describing the heat transfer process of HVDC submarine cables under transient load. The conductor temperature heat transfer process can be well fitted through constructing the transient and steady state components of conductor temperature, and the fitting method is helpful for temperature trend prediction and field maintenance of HVDC submarine cables.

Key words: transient load, HVDC, submarine cables, heat transfer

LIANG Zhengbo, LI Lijun, PENG Chao, XU Mingzhong, ZHAO Weijia, WANG Lei. Heat Transfer Process of HVDC Submarine Cables under Transient Load[J]. Electric Power, 2020, 53(9): 133-140.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202003213

https://www.electricpower.com.cn/EN/Y2020/V53/I9/133

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