The Lifetime Prediction and Insulation Failure Mechanism of XLPE for High-Voltage Cable

Li, Guochang; Wang, Zhaochen; Lan, Rui; Wei, Yanhui; Nie, Yongjie; Lei, Qi

doi:10.1109/tdei.2022.3215605

Cited by 11 publications

(4 citation statements)

References 23 publications

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“…Alghamdi等 [49] 采用Arrhenius模型和加速热老化相结合的方法估算了XLPE电缆绝缘材料的使用寿命, 其额定寿命为7 -30年. 孙建宇等 [50] 预测了XLPE电缆绝缘材料在不同温度下的使用寿命, 寿命评估准确率达到了100%. Li等 [51] 在加速热老化条件下建立了正态线性回归, 基于Arrhenius 在PE基体中掺入少量纳米填料可以提高聚合物的机械性能和热学性能 [52] .…”

Section: ) Ramu模型 Ramu模型主要是将逆幂定律unclassified

Aging and life control of cross-linked polyethylene as cable insulation material

Wang,

Li,

Zhang

et al. 2024

Acta Phys. Sin.

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Cross-linked polyethylene (XLPE) has been widely applied in the field of power cables because of its excellent mechanical properties and insulating properties. However, during the operation of high voltage cables, XLPE will inevitably be affected by electrical aging, thermal aging and electric-thermal joint aging, which makes the performance and life of the material decline. Therefore, it is necessary to enhance the aging resistance of XLPE without affecting its mechanical properties and insulating properties, so as to achieve the purpose of extending its service life. In this paper, the structural characteristics and cross-linking mechanism of XLPE are introduced, the aging process and influencing mechanism are systematically analyzed, and the life decay problems of XLPE due to aging are explored by using methods such as the temperature Arrhenius equation and the inverse power law of voltage. The regulatory strategies such as grafting, blending, and nano-particle modification, etc., can be applied to improve the thermal stability, antioxidant performance, and thermal aging resistance of XLPE, thereby extending its service life. Finally, the future direction of the strategies for regulating the service life of XLPE cable insulation materials is envisioned, which provides theoretical guidance for the further improvement and long-term stable operation of XLPE cable insulation materials.

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Section: ) Ramu模型 Ramu模型主要是将逆幂定律unclassified

Aging and life control of cross-linked polyethylene as cable insulation material

Wang,

Li,

Zhang

et al. 2024

Acta Phys. Sin.

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show abstract

“…By mathematically fitting a regression line to the experimentally determined Arrhenius plot data and considering its slope and y-intercept, the parameters E a , k parametrizing the thermal aging model are established. Experiments relying and implementing this methodology were carried out by [54,[63][64][65]. The previously referenced transformer standards describing loading behavior do not exist for XLPE cables.…”

Section: Thermal Aging Of Operating Equipmentmentioning

confidence: 99%

State-Space Load Flow Calculation of an Energy System with Sector-Coupling Technologies

Bottler

Weindl

2023

Energies

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This paper addresses the sector-coupling principle, highlights each associated sector’s technologies and showcases their future development, according to the German grid development plan. Furthermore, the research project ESM-Regio, and its goals in terms of simulatively analyzing the sector-coupling approach for a specific model region and future scenarios, is introduced. In this context, the key methods for modeling the electricity sector’s loading behavior are showcased. Most importantly, the state-space load flow calculation, load modeling (including the integration of the power demands of the sector-coupling technologies) and an assessment of grid operating equipment, based on thermal aging models, are described.

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“…Though designed to last more than 30 years, XLPE cables frequently operate near or past their expected lifespan. This indicates the high durability and reliability of XLPE cables, but it also emphasizes the increasing importance of diagnosing the insulation condition of aged cables and determining the appropriate time for their replacement [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Cable degradation is caused by electrical, thermal, chemical, and environmental stresses on the insulation [2,8,9]. Therefore, diagnostic techniques are required to accurately diagnose changes in the insulation condition and estimate the remaining life of the cable.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Deterioration Characteristics of Service Aged XLPE Cables according to Installation Location of Combined Heat and Power Plant

Kim,

Jung,

Lee

2024

Preprint

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The number of XLPE cables being used near or beyond their designed lifespan is increasing. The importance of timely cable replacement is increasing. Therefore, research is actively being conducted using VLF Tan δ diagnostic technology to assess the insulation condition of cables. There is a lack of studies measuring and analyzing VLF Tan δ of service aged XLPE cables. Additionally, there is a lack of research considering the operating environment. Therefore, research is needed to diagnose and analyze the insulation condition of the same serviced aged cable when it is operated in a different environment. This paper evaluates and analyzes the insulation condition of cables installed in the BFP, cooling tower, and deaerator booster pump of a combined heat and power plant. Each cable was analyzed by measuring VLF Tan δ, dielectric breakdown test of the cable, and tensile strength, elongation at break, crystallinity, and dielectric strength of XLPE specimens. Additionally, the correlation between VLF Tan δ and other characteristics was also analyzed. It was found that degradation progressed in the order of BFP, cooling tower, and deaerator booster pump. Therefore, it was confirmed that even for the same cable, deterioration varies depending on the installation location.

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The Lifetime Prediction and Insulation Failure Mechanism of XLPE for High-Voltage Cable

Cited by 11 publications

References 23 publications

Aging and life control of cross-linked polyethylene as cable insulation material

Aging and life control of cross-linked polyethylene as cable insulation material

State-Space Load Flow Calculation of an Energy System with Sector-Coupling Technologies

Analysis of Deterioration Characteristics of Service Aged XLPE Cables according to Installation Location of Combined Heat and Power Plant

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