Voltages and AC Corrosion on Metallic Tubes in Umbilical Cables Caused by Magnetic Induction From Power Cable Charging Currents

Gustavsen, Bjørn; Høyer-Hansen, Martin; Hatlo, Marius M.; Midttveit, Steinar

doi:10.1109/tpwrd.2018.2881221

Cited by 15 publications

(4 citation statements)

References 8 publications

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“…Long-span space structure is one of the important symbols of the development level of national building science and technology. Full-locked coil rope is widely used in long-span space structures because of its high strength, lightweight, and high fatigue strength [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Corrosion of Galfan‐Coated Full‐Locked Coil Ropes in a Natatorium Environment

Shi-chang

Gao

et al. 2022

Advances in Civil Engineering

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Galfan-coated full-locked coil rope is widely applied in long-span spatial structures because of its high strength and lightweight. However, the corrosion problem is relatively serious in the natatorium, which affects the structure’s durability. To deeply reveal the corrosion mechanism of Galfan-coated cable, this study first measured the natatorium on-site, and the results indicated that the natatorium environment can be simulated by a constant temperature and humidity environment in engineering. Then, the constant temperature and humidity corrosion test was carried out to simulate the corrosion of Galfan-coated cable with a certain amount of chloride ions on the surface, and the early corrosion rate was obtained. Later, the neutral salt spray accelerated corrosion test was carried out to predict the corrosion rate of the cable in the natatorium environment in the middle and late periods. The specimens included no-stress unprotected coating cable, high-stress unprotected coating cable, and high-stress protected coating cable. The results show that high stress will accelerate the corrosion, and a protective coating can effectively prevent the corrosion. Finally, the linear model, bilinear model, and bilinear model considering chloride ion accumulation were proposed to study the corrosion of the Galfan coating. The results show that the linear model overestimates the corrosion rate, and the bilinear model and bilinear model considering chloride ion accumulation are practical. Meanwhile, corresponding maintenance suggestions were given for the natatorium project to improve the structure's durability.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Corrosion of Galfan‐Coated Full‐Locked Coil Ropes in a Natatorium Environment

Shi-chang

Gao

et al. 2022

Advances in Civil Engineering

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show abstract

“…The power cable suffers natural or man-made disasters, leading to power cable insulation deterioration, defects, or damage. When the insulation of the power cable is damaged, a partial discharge is generated, which may induce an unwarned power outage [1][2][3]. The evaluation analysis using partial discharge signals to judge the power cable insulation condition has become the most sensitive and accurate power cable fault detection method.…”

Section: Introductionmentioning

confidence: 99%

A novel fault diagnosis method of power cable based on convolutional probabilistic neural network with discrete wavelet transform and symmetrized dot pattern

Sian

Kuo

et al. 2022

IET Science Measure & Tech

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To accurately diagnose the XLPE power cable insulation fault, this research proposed a novel hybrid algorithm combined with Convolutional Probabilistic Neural Network (CPNN) based on Discrete Wavelet Transform (DWT) and Symmetrized Dot Pattern (SDP) analysis. First, it built seven different power cable insulation defect models to measure partial discharge signals of power cable insulation faults. Then, a discrete wavelet transform was used for noise filtering. The time-domain partial discharge signal was directly converted into the point coordinate feature image of visual polar coordinates by SDP analyses. Finally, the feature image was trained and recognized by CPNN. After the important feature information of the feature-image was extracted by convolution layer and pooling layer operations, it is applied to the power cable insulation fault state diagnosis system based on the rapid learning and highly parallel computing of Probabilistic Neural Network (PNN). The experimental results proved that the method proposed in this research could accurately diagnose the power cable insulation fault type and the recognition accuracy is higher than 96%. The proposed method has a short detection time and high diagnostic accuracy. This proves that it can be applied to detect the power cable insulation fault type.

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“…Cable accessories include cable terminations and intermediate joints [3]. Due to the complexity of the structure, fabrication, connection, and operating conditions of the cable joint, it is easy to produce EFI concentration, which is a weak link for safe operation of power systems [4].…”

Section: Introductionmentioning

confidence: 99%

Research on Simulation Methods of Electric Field Intensity on Surface of 10 kV Cable Joint

Zhang¹,

Xiong²,

Wu³

et al. 2020

EPE

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The electric field intensity (EFI) is important characteristic quantity for evaluating the internal insulation state of cable joints. Based on finite element method, this paper proposes two EFI research methods, field-circuit coupling method and equivalent circuit method. The average EFI of the inner surface of the outer semi-conducting shield can be calculated from the current in the measuring circuit. The relative error between these two methods is about 15%, which roughly proves the consistency of the two methods. Further practical application research enables online monitoring of cable joints.

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Voltages and AC Corrosion on Metallic Tubes in Umbilical Cables Caused by Magnetic Induction From Power Cable Charging Currents

Cited by 15 publications

References 8 publications

Experimental Study on Corrosion of Galfan‐Coated Full‐Locked Coil Ropes in a Natatorium Environment

Experimental Study on Corrosion of Galfan‐Coated Full‐Locked Coil Ropes in a Natatorium Environment

A novel fault diagnosis method of power cable based on convolutional probabilistic neural network with discrete wavelet transform and symmetrized dot pattern

Research on Simulation Methods of Electric Field Intensity on Surface of 10 kV Cable Joint

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