Comparison of Conductor-Temperature Calculations Based on Different Radial-Position-Temperature Detections for High-Voltage Power Cable

Yang, Lin; Qiu, Weihao; Huang, Jichao; Hao, Yanpeng; Fu, Mingli; Hou, Shifeng; Li, Licheng

doi:10.3390/en11010117

Cited by 22 publications

(17 citation statements)

References 21 publications

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“…There are two difficulties in using the power cable as the test object. The first one is that the thermal resistance of the air gap between the water barrier and metal shield is hard to determine (Yang et al, 2018), which will introduce a Tang, Ruan, Li and Yin, Journal of Thermal Science and Technology, Vol.15, No.1 (2020) large systematic deviation in the calculation model. The second one is that the cable conductor temperature can hardly be accurately measured.…”

Section: Verification Test 31 General Considerationmentioning

confidence: 99%

“…There has been extensive research regarding the real-time calculation of cable conductor temperature using the surface temperature and the load current, including the thermal network (Jones et al, 2004;Millar and Lehtonen, 2005;Yang et al, 2018), the finite element method (FEM) (Li et al, 2006) and the artificial intelligence algorithms (Niu et al, 2016). Since the approach for conductor temperature calculation is quite mature, the validity of the model depends principally on the reliability of the cable thermal parameters and the inputs.…”

Section: Introductionmentioning

confidence: 99%

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Improving surface temperature measurement of the power cable and insulated busbar using the heat insulated layer

Tang

Ruan

et al. 2020

JTST

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Improving surface temperature measurement of the power cable and insulated busbar using the heat insulated layer Abstract The surface temperature measurement is susceptible to the surrounding air for the cable or the insulated busbar laid in free air. Therefore, an approach for improving their surface temperature measurements by covering the temperature sensor with a heat insulated layer is put forward. Firstly, the surface temperatures of the cable and the insulated busbar attached by a platinum resistance thermometer with and without a heat insulated layer under rated current are obtained using the thermal analyses in Comsol. Subsequently, the temperature rise test of the insulated busbar was carried out for the indirect verification of the previous analyses. The measured surface temperatures were used to calculate the conductor temperature based on the transient thermal network. By comparison with the measured conductor temperature, it is found that the deviation of the surface temperature measurement without the heat insulated layer is about 4~7 K while that with the heat insulated layer is only ±1 K. Further, the generalization of the presented method to the distributed temperature sensing system is analyzed. This study demonstrates that the accuracy of the surface temperature measurement of the cable and the insulated busbar can be effectively improved by wrapping a suitable heat insulated layer around the sensor.

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Section: Verification Test 31 General Considerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improving surface temperature measurement of the power cable and insulated busbar using the heat insulated layer

Tang

Ruan

et al. 2020

JTST

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“…Most arcing faults in a power system can be described as large discharges of electrical energy between conductors. The occurrence of short circuits can be indirectly conditioned by many factors, such as mechanical damage [1], insulation aging [2], overvoltages [3] and surface discharges [4]. In addition, arching faults in a power system that are associated with erroneous switching activities, accidental rapprochement or touching of active parts, as well as fatigue, insufficient concentration, and haste at work may contribute to short circuits directly [5].…”

Section: Motivationmentioning

confidence: 99%

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

2019

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The paper presents the layout of two opposing thyristors working as an Arc Eliminator (AE). The presented solution makes it possible to protect an electrical apparatus against the effects of an arcing fault. An Arc Eliminator is assumed to be a device cooperating with the protected apparatus. Thyristors were used because of their speed of operation and a relatively lower cost compared to other semiconductors with the same current-carrying capacity. The proposed solution, as one of the few currently available, makes it possible to eliminate the fault arc—both at short-circuit currents and current values to which overcurrent protections do not react. A test circuit was designed and made to study the effectiveness of the thyristor arc eliminator. A series of tests was carried out with variable impedance in the arc branch, including the influence of circuit inductance on arc time. It was found that the thyristor arc eliminator effectively protects devices powered from a low voltage power network against the effects of a fault or arc fault. The correctness of system operation for a wide range of impedance changes in the circuit feeding the arc location was demonstrated.

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“…In the above works and largely in the literature, the focus is not on a detailed analysis of the influence of the connection of temperature values at different points of cable lines, taking into account different ways of arranging them [16]. Such an influence, but for other cases, was taken into account in [12][13][14][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A Proposed New Approach for the Assessment of Selected Operating Conditions of the High Voltage Cable Line

Borecki

2020

Energies

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Calculation models for the selection of cable lines used for expansion and modernization in the energy system and energy transmission planning are recognized tools supporting decision-making in both the energy sector and energy policy. At the same time, the above calculation models contain a large number of correction factors taking into account the temperature of the external environment at various points, the mutual influence of which is not taken into account. This means limitations to today’s common approaches to solutions, especially with regard to the required safety buffer for cable line selection. To meet this challenge, this article presents a parameter that takes into account the change and difference in temperature at various points in the external environment in the analyzed cable line systems. The purpose of this paper was to develop a new approach to the selection of a cable line in order to minimize failure during operation. For this purpose, possible temperature cases that may occur during line operation in different countries and at different rated voltages have been identified. Simulation models for individual cable line layouts were developed and the extreme temperature cases of the line operation for the maximum negative and positive temperature difference between the cable core and the external environment were considered in detail. The development of the curve of the change of the correction factor for the difference in the operating temperature of the cable line will allow for a more precise selection of the cable line parameters and the shortening of the current calculation model in terms of cable selection. In addition, this article presents a comparison of the change in the value of the correction factor from the change in temperature of a selected phase of a cable line system.

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Comparison of Conductor-Temperature Calculations Based on Different Radial-Position-Temperature Detections for High-Voltage Power Cable

Cited by 22 publications

References 21 publications

Improving surface temperature measurement of the power cable and insulated busbar using the heat insulated layer

Improving surface temperature measurement of the power cable and insulated busbar using the heat insulated layer

Thyristor Arc Eliminator for Protection of Low Voltage Electrical Equipment

A Proposed New Approach for the Assessment of Selected Operating Conditions of the High Voltage Cable Line

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