Investigation on Cable Rejuvenation by Simulating Cable Operation

Xie, Yue; Zhao, Yifeng; Bao, Shuzhen; Wang, Pengyu; Huang, Jian; Wang, Peng; Liu, Gang; Hao, Yanpeng; Li, Licheng

doi:10.1109/access.2019.2963423

Cited by 11 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Relevant parameters are listed in Table 4. From Figure 7 (a), a small shoulder peak located at 50 to 90 • C exists in most of the specimens expect for S4, which indicates the thermal history, causing by the degassing process during manufacture or overheating process during the actual operation of the cable [2]. For S4 to S1, it can be found that the melting range is widened with the increase of the operating period.…”

Section: ) Results Of Dsc Measurementmentioning

confidence: 94%

Correlation Between Thermal Parameters and Morphology of Cross-Linked Polyethylene

et al. 2020

Self Cite

View full text Add to dashboard Cite

This paper reveals a correlation between morphology and thermal parameters on cross-linked polyethylene (XLPE) cable with different insulating states. Several cables were selected to detect the physicochemical and thermal parameters of the XLPE. The results show that the cable ampacity is determined by the thermal parameters, which are deeply subjected to the morphology of the XLPE. The molecular chain and crystal structure of the XLPE have a close connection with the thermal resistivity. The physicochemical parameters of carbonyl index (CI) and unsaturated band index (UBI) from Fourier transform infrared spectrum (FTIR) and melting range (R m) from differential scanning calorimetry (DSC) can be the indicator to evaluate the diversity of the thermal resistivity. The change of thermal capacity is governed by the crystal distribution of the XLPE. The physicochemical parameters of crystallinity (χ) and lamellar thickness (L) from DSC can be the indicator to evaluate the change of the thermal capacity. In addition, FWHM of the crystallization peak W , crystalline rate index (T 0-T P) and cross-linking degree (G) can also be the indicator of the thermal parameters. Finally, this paper proposes a more accurate on-line monitoring method for electric power industry by detecting thermal parameters to diagnose the operating cables in the practical application.

show abstract

Section: ) Results Of Dsc Measurementmentioning

confidence: 94%

Correlation Between Thermal Parameters and Morphology of Cross-Linked Polyethylene

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, it is hard to obtain the parameters of c eq1 , tan δ 1 , c eq2 and tan δ 2 respectively. Therefore, Equation ( 16) is approximated to obtain Equation (17).…”

Section: Equivalent Transient Thermal Circuit Delaminated Model Of Xl...mentioning

confidence: 99%

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…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%

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

Yang

Peng

et al. 2023

Energies

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Investigation on Cable Rejuvenation by Simulating Cable Operation

Cited by 11 publications

References 17 publications

Correlation Between Thermal Parameters and Morphology of Cross-Linked Polyethylene

Correlation Between Thermal Parameters and Morphology of Cross-Linked Polyethylene

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

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

Contact Info

Product

Resources

About