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Study on space charge characteristics in XLPE under DC superimposed impulse voltage
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Guoxing WU1, Chengwei ZHANG1, Xiao CHEN1, Shu XU1, Lei JIA2, Shuai HOU2, Yunpeng ZHAN2, Wenbo ZHU2
Insulating Materials | 2023, 56(3) : 26 - 32
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Insulating Materials | 2023, 56(3): 26-32
• Material Research •
Study on space charge characteristics in XLPE under DC superimposed impulse voltage
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Guoxing WU1, Chengwei ZHANG1, Xiao CHEN1, Shu XU1, Lei JIA2, Shuai HOU2, Yunpeng ZHAN2, Wenbo ZHU2
Affiliations
  • 1Shenzhen Power Supply Bureau, Shenzhen 518000, China
  • 2Electric Power Research Institute, China Southern Power Grid, Guangzhou 510663, China
Published: 2023-03-20 doi: 10.16790/j.cnki.1009-9239.im.2023.03.005
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HVDC cross-linked polyethylene (XLPE) cables will be damaged by operation impulse voltage caused by switching and other operations in the power system under working condition, which will affect the insulation. However, at present, there is a lack of relevant research on the cable insulation deterioration generated by space charge accumulation caused by multiple impulse cumulative effect. Based on the PEA space charge measurement system under DC superimposed impulse voltage in the laboratory, the space charge characteristics of XLPE cable insulation under DC voltage, impulse voltage, and DC superimposed impulse voltage were measured in this paper. The results show that XLPE is dominated by heteropolar charges under positive DC voltage, and negative charges of the same polarity appear on the SC electrode under negative DC voltage. Continuous high-amplitude impulse voltage can cause large number of homopolar charges injection on the two electrodes, and the amount of injected charge is larger under negative impluse voltage. Under DC superimposed impulse voltage, the same polarity superimposition method can promote the injection of homopolar charge on the two electrodes more than the opposite polarity superimposition method. Moreover, the longer the impulse voltage is applied, the more charge accumulates in the XLPE sample.

XLPE  /  DC voltage  /  impulse voltage  /  space charge  /  superimpose
Guoxing WU, Chengwei ZHANG, Xiao CHEN, Shu XU, Lei JIA, Shuai HOU, Yunpeng ZHAN, Wenbo ZHU. Study on space charge characteristics in XLPE under DC superimposed impulse voltage[J]. Insulating Materials, 2023 , 56 (3) : 26 -32 . DOI: 10.16790/j.cnki.1009-9239.im.2023.03.005
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.03.005
  • Receive Date：2022-03-21
  • Online Date：2025-11-21
  • Published：2023-03-20
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  • Received：2022-03-21
  • Revised：2022-05-17
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    1Shenzhen Power Supply Bureau, Shenzhen 518000, China
    2Electric Power Research Institute, China Southern Power Grid, Guangzhou 510663, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.03.005
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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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