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Influence of Type Test on Performance of XLPE DC Cable Insulation
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Weijia ZHAO1, Wenpeng LI1, 2, Hongda YAN1, Xiaoning SHI1, Chong ZHANG1, Xin CHEN1
Insulating Materials | 2022, 55(1) : 107 - 112
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Insulating Materials | 2022, 55(1): 107-112
• Test and Analysis •
Influence of Type Test on Performance of XLPE DC Cable Insulation
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Weijia ZHAO1, Wenpeng LI1, 2, Hongda YAN1, Xiaoning SHI1, Chong ZHANG1, Xin CHEN1
Affiliations
  • 1State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China
  • 2State Key Laboratory of Electricial Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
Published: 2022-01-20 doi: 10.16790/j.cnki.1009-9239.im.2022.01.017
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The main insulation of cross-linked polyethylene (XLPE) HVDC cable was sliced at radial inner, middle, and outer layers to as samples, and their equivalent thermal history was modeled by differential scanning calorimetry (DSC). The changes of chemical and electrical properties of each layer in cable insulation after type test were analyzed by infrared spectroscopy (FTIR), space charge, and DC electrical strength test. The results show that after type test, the equivalent heat treatment temperatures of each layer in cable main insulation are about 70℃, there is a small difference between the equivalent heat treatment time of the middle layer and the outer layer, while the equivalent heat treatment time of the inner layer is about 581 times bigger than that of the middle layer. There are little changes in DC electric strength and chemical properties of each layer in cable main insulation. Due to the equivalent heat treatment time of each layer is different, the impurities, polar small molecules, and other substances in inner insulation layer continue to diffuse from the inner layer to the middle layer, which results in the significant accumulation of heteropolar space charges.

type test  /  DC cable  /  XLPE  /  space charge  /  DC electric strength
Weijia ZHAO, Wenpeng LI, Hongda YAN, Xiaoning SHI, Chong ZHANG, Xin CHEN. Influence of Type Test on Performance of XLPE DC Cable Insulation[J]. Insulating Materials, 2022 , 55 (1) : 107 -112 . DOI: 10.16790/j.cnki.1009-9239.im.2022.01.017
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.01.017
  • Receive Date：2021-02-04
  • Online Date：2025-12-23
  • Published：2022-01-20
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  • Received：2021-02-04
  • Revised：2021-04-07
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Affiliations
    1State Key Laboratory of Advanced Power Transmission Technology, Global Energy Interconnection Research Institute Co., Ltd., Beijing 102209, China
    2State Key Laboratory of Electricial Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
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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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