Temperature Field Simulation and Ampacity Optimization of 500kV HVDC Submarine Transmission Cable

Farooq, Umer; Yang, Fan; Shaikh, Jamshed Ali; Bhutta, Muhammad Shoaib; Aslam, Farooq; Wu, Tao; Li, Jinxian; Haq, Inzamam Ul

doi:10.1109/aeero52475.2021.9708347

Cited by 9 publications

(6 citation statements)

References 8 publications

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\sigma

was fitted by the Arrhenius Equation () as shown in Figure 4, and the average activation energy φ was obtained [24].

\sigma ={\sigma }_{0}\,\mathrm{exp}\left(-\frac{\varphi }{{k}_{\mathrm{B}}T}\right)

where σ 0 is the reference value of conductivity, k B is Boltzmann's constant, and T is the temperature in K.…”

Section: Resultsmentioning

confidence: 99%

“…To further investigate the variation of conductivity at different temperatures, under 20 kV/mm, which corresponds to the cable operating electric field [5], the temperature dependence curves of conductivity σ was fitted by the Arrhenius Equation (1) as shown in Figure 4, and the average activation energy φ was obtained [24].…”

Section: Conductance Currentmentioning

confidence: 99%

“…At present, the maximum operating temperature of XLPE DC cable insulation materials of the mature applied submarine DC cable is limited to 70°C, which is subject to the electric field strength reversal caused by the temperature dependence of conductivity. In other words, when the temperature of the surrounding medium is 20°C–30°C, the temperature difference formed between the inner and outer insulation layers is 20°C–40°C and no significant electric field reversal is formed [5]. With the widespread use of an ultra‐high voltage direct current (UHVDC) power system, UHVDC cables will become a more economical and convenient solution for power lines crossing rivers and circling cities.…”

Section: Introductionmentioning

confidence: 99%

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Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

et al. 2023

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To enhance the DC electrical performance of cross‐linked polyethylene (XLPE), the graftable antioxidant methacrylic acid 2‐hydroxy‐3‐(4‐anilinoanilino) propyl ester (GA), which contains carbonyl and amino groups, and the crosslinking coagent trimethylolpropane trimethacrylate (TMPTMA), which contains carbonyl groups, are individually or co‐grafted onto XLPE. The slightly higher deep trap density introduced by higher grafting concentration of TMPTMA results in more significant suppression effect of conductance current and enhanced breakdown strength at a lower temperature, while the suppression effect for the conductance current at 90°C becomes weakened due to limited trap energy. Meanwhile, the deeper energy level introduced by GA suppresses the conductance current and improves the electrical strength of XLPE at 90°C more significantly. By co‐grafting, the conductance current of XLPE in a wide range temperature can be significantly reduced, especially for the temperature dependence of conductance current, which is beneficial to suppress the field strength reversal. The results of thermally stimulated current and molecular simulation show that the polar groups of two monomers introduce deep charge traps in XLPE. The co‐grafting system ensures the rationality of the crosslinking reaction kinetics and does not affect the cable manufacturing.

show abstract

\sigma

was fitted by the Arrhenius Equation () as shown in Figure 4, and the average activation energy φ was obtained [24].

\sigma ={\sigma }_{0}\,\mathrm{exp}\left(-\frac{\varphi }{{k}_{\mathrm{B}}T}\right)

where σ 0 is the reference value of conductivity, k B is Boltzmann's constant, and T is the temperature in K.…”

Section: Resultsmentioning

confidence: 99%

Section: Conductance Currentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

et al. 2023

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“…We eventually settled on the research question "Can the addition of an intra-conductor embedded cooling channel in XLPE land cables increase the ampacity of the cable, and what are the effects of the fluid characteristics?" Although some studies have previously demonstrated the possibility of external fluid cooling [6], we would like to explore the effec-tiveness and feasibility of placing an active cooling channel inside the conductor core, as to not affect the properties of the existing insulating layers. This would further expand to investigate the effects of the fluid characteristics, such as flow velocity, inlet/outlet temperature, or viscosity.…”

Section: Group Proposalsmentioning

confidence: 99%

Bulletin Board: Report on the 2022 IEEE DEIS Summer School in Monmouth, Wales

Bill

Ratheiser

et al. 2023

IEEE Electr. Insul. Mag.

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“…The paper, however, neglected the ambient environment of the cable. Authors in [25] optimize the ampacity of a submarine HVDC cable taking into consideration of water flow.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Challenges for MVDC Power Cables Used in Wide Body All Electric Aircraft Under Low Pressures

2022

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Power cables are a vital component of the future electric power systems (EPS) envisaged in wide body all electric aircraft (AEA). They are required to be high power delivery and low system mass. Designing proper power cables for AEA faces thermal challenges due to the lower pressure of 18.8 kPa at the cruising height of a wide body aircraft. Due to the limited heat transfer at that pressure, the temperature field distribution across the aircraft cable, mainly a function of pressure, surface emissivity, and ambient surface geometry, is likely to diverge from that at atmospheric pressure. Moreover, temperature field distribution affects the conductivity of the insulation, which in turn alters and may inverse the electric field distribution across the DC cables. Therefore, a coupled multi-physics study should be conducted to calculate the temperature field and electric field across the cable at different ambient temperatures and various possible geometries of the ambient environment. In this paper, the temperature field distribution across a 5 kV DC cable is studied at atmospheric and 18.8 kPa pressures. The voltage level of 5 kV was resulted from our previous studies where we proposed new EPS architectures for a wide-body AEA. The main purpose of this study is to obtain the maximum permissible current flowing the cable at the atmospheric and 18.8 kPa pressures regarding the thermal limits of the cable. It is shown that at 18.8 kPa the maximum permissible current flowing the cable is decreased by 14.75% compared to its value at atmospheric pressure when the size of the ambient surface is 250 mm. Also, the electric conductivity and electric field across the cable insulation are evaluated at different conductor currents and insulator temperature gradients. INDEX TERMSAircraft electrification, all electric aircraft (AEA), MVDC power cable, electric power system (EPS), finite element model (FEM), heat convection, thermal analysis.

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Temperature Field Simulation and Ampacity Optimization of 500kV HVDC Submarine Transmission Cable

Cited by 9 publications

References 8 publications

Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

Bulletin Board: Report on the 2022 IEEE DEIS Summer School in Monmouth, Wales

Heat Transfer Challenges for MVDC Power Cables Used in Wide Body All Electric Aircraft Under Low Pressures

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