Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables
The growing demand for direct current transmission emphasizes the need for advanced insulation suitable for high-capacity, long-distance applications. Thermoplastics, especially polypropylene, offer several advantages over conventional materials like XLPE (cross-linked polyethylene) and EPR (ethylen...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/15/14/8106 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839616553240231936 |
|---|---|
| author | Seung-Won Lee Ik-Su Kwon Byung-Bae Park Sung-ho Yoon Dong-Eun Kim Jin-Seok Lim Hae-Jong Kim |
| author_facet | Seung-Won Lee Ik-Su Kwon Byung-Bae Park Sung-ho Yoon Dong-Eun Kim Jin-Seok Lim Hae-Jong Kim |
| author_sort | Seung-Won Lee |
| collection | DOAJ |
| description | The growing demand for direct current transmission emphasizes the need for advanced insulation suitable for high-capacity, long-distance applications. Thermoplastics, especially polypropylene, offer several advantages over conventional materials like XLPE (cross-linked polyethylene) and EPR (ethylene propylene rubber), including higher thermal stability, recyclability, and reduced space charge accumulation. However, due to the inherent rigidity and limited flexibility of PP, its mechanical aging becomes a critical factor in assessing its long-term reliability as a cable insulation. In this study, mechanical aging characteristics, specifically declines in tensile strength and elongation, were selected as key indicators of insulation aging. Accelerated aging tests were conducted at 90 °C, 110 °C, and 130 °C for up to 5000 h. The experimental data were fitted to exponential models to derive aging coefficients, which formed the basis for the proposed aging model and the ACI (aging condition index). The ACI enables quantitative assessment of the current insulation condition and estimation of the remaining lifetime until a predefined threshold (e.g., ACI = 0.5) is reached. These findings contribute to the development of condition-based maintenance strategies and long-term asset management for power cables, offering practical insights for improving the reliability of future power grid systems. |
| format | Article |
| id | doaj-art-9a8b41fd506c4a02a96d1c6914bce48c |
| institution | Matheson Library |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-9a8b41fd506c4a02a96d1c6914bce48c2025-07-25T13:13:12ZengMDPI AGApplied Sciences2076-34172025-07-011514810610.3390/app15148106Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power CablesSeung-Won Lee0Ik-Su Kwon1Byung-Bae Park2Sung-ho Yoon3Dong-Eun Kim4Jin-Seok Lim5Hae-Jong Kim6Power Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaPower Cable Research Center, Korea Electrotechnology Research Institute, Changwon-si 51543, Gyeongsangnam-do, Republic of KoreaThe growing demand for direct current transmission emphasizes the need for advanced insulation suitable for high-capacity, long-distance applications. Thermoplastics, especially polypropylene, offer several advantages over conventional materials like XLPE (cross-linked polyethylene) and EPR (ethylene propylene rubber), including higher thermal stability, recyclability, and reduced space charge accumulation. However, due to the inherent rigidity and limited flexibility of PP, its mechanical aging becomes a critical factor in assessing its long-term reliability as a cable insulation. In this study, mechanical aging characteristics, specifically declines in tensile strength and elongation, were selected as key indicators of insulation aging. Accelerated aging tests were conducted at 90 °C, 110 °C, and 130 °C for up to 5000 h. The experimental data were fitted to exponential models to derive aging coefficients, which formed the basis for the proposed aging model and the ACI (aging condition index). The ACI enables quantitative assessment of the current insulation condition and estimation of the remaining lifetime until a predefined threshold (e.g., ACI = 0.5) is reached. These findings contribute to the development of condition-based maintenance strategies and long-term asset management for power cables, offering practical insights for improving the reliability of future power grid systems.https://www.mdpi.com/2076-3417/15/14/8106power cablesaging coefficientaccelerated aging testtensile strengthelongationaging condition index |
| spellingShingle | Seung-Won Lee Ik-Su Kwon Byung-Bae Park Sung-ho Yoon Dong-Eun Kim Jin-Seok Lim Hae-Jong Kim Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables Applied Sciences power cables aging coefficient accelerated aging test tensile strength elongation aging condition index |
| title | Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables |
| title_full | Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables |
| title_fullStr | Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables |
| title_full_unstemmed | Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables |
| title_short | Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables |
| title_sort | calculation of aging coefficient for establishing aging condition index of thermoplastic insulated power cables |
| topic | power cables aging coefficient accelerated aging test tensile strength elongation aging condition index |
| url | https://www.mdpi.com/2076-3417/15/14/8106 |
| work_keys_str_mv | AT seungwonlee calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT iksukwon calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT byungbaepark calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT sunghoyoon calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT dongeunkim calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT jinseoklim calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables AT haejongkim calculationofagingcoefficientforestablishingagingconditionindexofthermoplasticinsulatedpowercables |