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Study on electrical ageing performance of XLPE insulating material under low frequency voltage
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Yuanxiang ZHOU1, 2, Jiyu HUANG1, Jianning CHEN2, Guimin JIANG1, 2, Xin HUANG2
Insulating Materials | 2025, 58(1) : 1 - 10
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Insulating Materials | 2025, 58(1): 1-10
• Material Research •
Study on electrical ageing performance of XLPE insulating material under low frequency voltage
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Yuanxiang ZHOU1, 2, Jiyu HUANG1, Jianning CHEN2, Guimin JIANG1, 2, Xin HUANG2
Affiliations
  • 1. The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, School of Electrical Engineering, Xinjiang University, Urumqi 830047, China
  • 2. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Published: 2025-01-20 doi: 10.16790/j.cnki.1009-9239.im.2025.01.001
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With the development and construction of offshore wind power, cross-linked polyethylene cables are gradually used in low-frequency power transmission. However, their insulation characteristics after ageing at low-frequency voltage are still unclear. So the insulation characteristics and ageing mechanism of cross-linked polyethylene after ageing at low frequency were studied in this paper. Firstly, cross-linked polyethylene samples were conducted accelerated ageing experiments at voltage frequencies of 20, 35, 50 Hz. Then, the physicochemical and electrical properties of the ageing samples were tested. Finally, the mechanism of voltage frequency on the electrical ageing of cross-linked polyethylene was investigated. The results show that with the decrease of the ageing voltage frequency, the crystallinity of cross-linked polyethylene decreases, the space charge accumulation and conductivity increase, and the AC electric strength decreases. The decrease of voltage frequency makes the ageing degree increase significantly. Combined with the infrared spectroscopy and crystallinity analysis, the decrease of voltage frequency makes the probability of charge into trap and forming hot electron be higher, the electroluminescence effect caused by electron-hole composite is stronger, which causes the increase of polymer molecular chain breakage and cleavage, and then its electric strength is reduced.

low frequency ageing  /  submarine cables  /  cross-linked polyethylene  /  insulation degradation
Yuanxiang ZHOU, Jiyu HUANG, Jianning CHEN, Guimin JIANG, Xin HUANG. Study on electrical ageing performance of XLPE insulating material under low frequency voltage[J]. Insulating Materials, 2025 , 58 (1) : 1 -10 . DOI: 10.16790/j.cnki.1009-9239.im.2025.01.001
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doi: 10.16790/j.cnki.1009-9239.im.2025.01.001
  • Receive Date：2024-01-05
  • Online Date：2025-11-05
  • Published：2025-01-20
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  • Received：2024-01-05
  • Revised：2024-03-11
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Affiliations
    1. The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, School of Electrical Engineering, Xinjiang University, Urumqi 830047, China
    2. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2025.01.001
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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