Experimental study on cable rejuvenation via simulated cable operation

Xie, Yue; Zhao, Yifeng; Fan, Xinghui; Han, Zhuozhan; Wang, Pengyu; Liu, Gang; Hao, Yanpeng; Li, Licheng

doi:10.1109/tdei.2020.008452

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…The functional groups of these chemicals are styryl (C=C), carbonyl (=C=O), and hydroxyl (-OH), which correspond, respectively, to the absorption peaks in the range of 1635~1665 cm −1 , 1700~1750 cm −1 , and 3200~3360 cm −1 [8]. The functional groups of antioxidants are phenol and ester (-C=O), which correspond to absorption peaks around 3640 cm −1 and 1735 cm −1 , respectively [11]. An aromatic ketone compound (AKVS) is served as the voltage stabilizer, the functional group of which are ketone (-CO-) and aromatic hydrocarbon, corresponding to the absorption peaks at 1723 cm −1 and 1635 cm −1 , respectively.…”

Section: Results Of Ftir Measurementmentioning

confidence: 99%

“…Energies 2023, 16, 3353 7 of 17 1735 cm , respectively [11]. An aromatic ketone compound (AKVS) is served voltage stabilizer, the functional group of which are ketone (-CO-) and ar hydrocarbon, corresponding to the absorption peaks at 1723 cm −1 and 163 respectively.…”

Section: Results Of Ftir Measurementmentioning

confidence: 99%

“…However, due to its high cost of labor and material resources, long-term operation, and high consumption of sample, there are few relevant investigations, especially in the high voltage power cable. Y. Xie et al [11,12] conducted different simulation cable operation tests on retired XLPE power cables and found that the thermal and electrical properties of each layer in the cable insulation were improved to varying degrees under the short-term, high-temperature heat treatment, which was due to the annealing effect. Tzimas A et al [13] stressed the same XLPE-insulated AC cables under different electrothermal conditions and for various durations.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Yang

Peng

et al. 2023

Energies

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To explore the influence of electrothermal aging on the properties of HVAC XLPE cable during its normal operation, two circuits of 110 kV XLPE cable were subjected to a combined electrothermal accelerated aging test for 180 days. The test voltage was set at 95 kV, and the test temperature was set at 90 °C. The constant temperature aging mode was adopted for one circuit, and the periodic thermal cycle aging mode was adopted for the other circuit. The dielectric property of the cable was diagnosed with dielectric spectroscopy measurement, and the thermal property was diagnosed with thermal parameters (thermal capacity and thermal resistance) measurement. Combined with Fourier infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) measurements, morphological changes in the insulation under different electrothermal aging modes were analyzed to construct the correlation with the dielectric and thermal properties. The results show that the short-term electrothermal constant temperature aging mode effectively enhances the dielectric and thermal properties of the cable by modifying spherulite morphology and migrating polar compounds; the short-term electrothermal cycle aging mode also enhances the thermal properties of the cable due to the drop in small polar compounds. However, different distributions of polar compounds and crystal interfaces in the insulation lead to extreme distortion in the electric field distribution.

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Section: Results Of Ftir Measurementmentioning

confidence: 99%

Section: Results Of Ftir Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Yang

Peng

et al. 2023

Energies

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“…With regard to S7-2, it is found that the primary crystals have deteriorated. This is probably due to the fact that the microcrystals generated under the repeated melting-recrystallization process [17] tend to impede the movement of molecular chains from converting into thicker lamellae [18]. Nevertheless, the integral structure of molecular chains and homogeneous distribution of spherulites still play a vital part in the enhancement of the thermal property of the cable.…”

Section: Analysis Of Temperature Field Effectmentioning

confidence: 99%

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Yang

Peng

et al. 2022

Preprint

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To explore the influence of electrothermal aging on the properties of HVAC XLPE cable during its actual operation, two circuits of 110 kV XLPE cable were subjected to a combined electrothermal accelerated aging test for 180 days. The test voltage was set at 95 kV and the test temperature was set at 90 ℃. One circuit of cable adopted constant temperature aging mode and the other circuit adopted periodic thermal cycle aging mode. The dielectric property of the cable is diagnosed by dielectric spectroscopy measurement, and the thermal property is diagnosed by thermal parameters measurement. Combined with Fourier infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) measurements, morphological changes of the insulation under different electrothermal aging modes are analyzed to construct the correlation with the dielectric and thermal properties. The results show that short-term electrothermal constant temperature aging mode effectively enhances the dielectric and thermal properties of the cable by modifying spherulites’ morphology and migrating small polar compounds; short-term electrothermal cycle aging mode also enhances the thermal properties of the cable due to the drop in small polar compounds. However, different distributions of small polar compounds and crystal interfaces in the insulation lead to extreme distortion in electric field distribution.

show abstract

“…However, due to its high cost of labour and material resource, long-term operation and high consumption of sample, few relevant investigations have been conducted, especially for high voltage power cable. Y. Xie et al [16,17] conducted different simulating cable operation test to the retired XLPE power cables. It is found that the thermal and electrical properties of each layer of the cable insulation are improved in varying degrees under the short-term high temperature heat treatment, due to the annealing effect.…”

Section: Introductionmentioning

confidence: 99%

Dynamic ageing research of cross‐linked polyethylene cable insulation based on temporal‐spatial dimension under combined electro‐thermal effect

Zhao

Xie

Zhao³

et al. 2023

High Voltage

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Dynamic ageing process of cross‐linked polyethylene (XLPE) cable insulation under combined electro‐thermal effect is investigated by the construction of theoretical analysis model and the practice of operation‐simulated ageing test. Firstly, theoretical analysis model is constructed from time and spatial dimensions. From the time dimension, in the light of the impeding trend of internal stress to external stress, the XLPE ageing process of Steady state ‐Transition state ‐Steady state (STS) is proposed to illustrate the dynamic ageing process of XLPE. From the spatial dimension, the insulation is divided into three scales to quantify the ageing. Secondly, to practice the theoretical analysis model, an operation‐simulated ageing test was conducted on two high voltage alternating current cables with service years of 15 and 30 for 540 days. Subsequently, relevant diagnostic measurements were applied to analyse the influence of physicochemical characteristics on the dielectric and heat transfer performances of the cables. The results show that the degradation of the actual operating cable is an extremely slow process. On the one hand, the response in physical changes of morphology counterbalances the external stress, maintaining the stability. On the other hand, once the chemical changes occur, negative feedback mechanism tends to impede the occurrence of further degradation by regulating fields distribution.

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Experimental study on cable rejuvenation via simulated cable operation

Cited by 7 publications

References 5 publications

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Dynamic ageing research of cross‐linked polyethylene cable insulation based on temporal‐spatial dimension under combined electro‐thermal effect

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