Improving underground power distribution capacity using artificial backfill materials

Gouda, Osama E.; Dein, Adel Z. El

doi:10.1049/iet-gtd.2015.0274

Cited by 26 publications

(20 citation statements)

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“…Therefore, many researchers have introduced several techniques to reduce and maintain the grounding resistant in low level. Such techniques are implementation of reducing agent/backfill materials [7][8][9][10] or performed the chemical treatment in the grounding system [11,12]. These materials are placed inside the trench, where the grounding electrode is installed and mixed with the natural soil [13,14].…”

Section: Introductionmentioning

confidence: 99%

The use of enhancement material in grounding system: a review

Azmi

Ahmad

Yiew

et al. 2019

IJEECS

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<p>This paper reviews the improvement of grounding impedance in grounding system by means of enhancement materials. Various enhancement materials for the past 20 years will be reviewed according to their advantages and disadvantages, followed by a focus on the technique for proper measurement set up based on the standard. In addition to that, the condition of enhancement materials under high voltage exposure is reviewed. Many researchers claim that soil resistivity, moisture content, and surrounding environment are the most contributed to the grounding system specifically on the grounding impedance. Hence, the utilization of enhancement materials is essential in order to maintain the grounding system performance.</p>

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Section: Introductionmentioning

confidence: 99%

The use of enhancement material in grounding system: a review

Azmi

Ahmad

Yiew

et al. 2019

IJEECS

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“…They found that the cable ampacity would be improved as the backfill material amount and thermal conductivity increased. The soil desiccation phenomenon around buried cables has been investigated by Gouda and Dein [8]. The thermal properties of eleven different backfill materials were analysed and the most suitable backfill material was obtained.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer in Trefoil Buried Cable with Fluidized Thermal Backfill and Laying Parameter Optimization

Quan

et al. 2019

Mathematical Problems in Engineering

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Trefoil buried cable is one of the important cable arrangements for the underground transmission line, and its heat transfer performance is relatively poor. By filling with fluidized thermal backfill material (FTB) around trefoil buried cables, the heat transfer would be efficiently enhanced, while the filling cost should also be considered. In the present study, the heat transfer process in the FTB trefoil buried cables is numerically studied, where the cable core loss and eddy current loss in the cable were coupled for the simulation. The heat transfer performances and ampacities for trefoil buried cables with different back fill materials were analysed and compared with each other. Then, the laying parameters for the parabolic-type FTB trefoil buried cables were optimized with the radial basis function neural network (RBNN) and genetic algorithm (GA). Firstly, it is found that, with FTB material, the maximum temperature in the cable core is obviously reduced, and the cable ampacity is greatly improved as compared with the cables buried around natural soil (NS). Secondly, when compared with flat-type FTB model, the heat transfer rate in the cable with parabolic-type FTB laying method would be slightly reduced, while the FTB amount used for the buried cables is greatly reduced. Finally, as for parabolic-type FTB trefoil buried cables, with proper design of geometric parameters (s1 = 0.290 m, s2 = 0.302 m, and l = 0.3 m with I = 1300 A) for the FTB laying cross section, the overall performance for the cable was optimized.

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“…In the case of variable loads, the losses of the cable produce heat; this heat leads to migration of the moisture content in the soil around the cable. Also, in turn, dry areas may be formed around the cable, raising the thermal resistance of the soil and interruption the heat dissipation of the cable to the surrounding soil [4,5].…”

Section: Introductionmentioning

confidence: 99%