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Study on polarization current of EPDM insulation for power cable under different pressure and temperature
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Huayong GONG, Guotao YANG, Hexiang YAN
Insulating Materials | 2023, 56(10) : 91 - 97
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Insulating Materials | 2023, 56(10): 91-97
• Test and Analysis •
Study on polarization current of EPDM insulation for power cable under different pressure and temperature
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Huayong GONG, Guotao YANG, Hexiang YAN
Affiliations
  • Lishui Liandu Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Lishui 323000, China
Published: 2023-10-20 doi: 10.16790/j.cnki.1009-9239.im.2023.10.012
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In order to study the effects of pressure and temperature on the conductivity of ethylene propylene rubber (EPDM) insulation for cables, the polarization current of EPDM under different electric field, temperature, and pressure were measured. The polarization index and conductivity were extracted, and the change law of the performance of EPDM was analyzed. The effect of pressure and temperature on the conduction mechanism of EPDM on pressure and temperature was studied based on the relationship between quasi-steady-state conductance current density and electric field intensity. The results show that the polarization index and conductivity are linearly related to temperature, but nonlinear related to pressure. This is because the conduction mechanism of EPDM changes under the influence of pressure and temperature, and the increase of temperature can promote the increase of the number of carriers in EPDM. The lower pressure limits the intermolecular movement of EPDM, while the higher pressure can destroy the molecular chain, resulting in an increase in electrical conductivity.

EPDM  /  thermal-mechanical stress  /  polarization current  /  polarization index  /  electrical conductivity
Huayong GONG, Guotao YANG, Hexiang YAN. Study on polarization current of EPDM insulation for power cable under different pressure and temperature[J]. Insulating Materials, 2023 , 56 (10) : 91 -97 . DOI: 10.16790/j.cnki.1009-9239.im.2023.10.012
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.10.012
  • Receive Date：2022-11-10
  • Online Date：2025-11-24
  • Published：2023-10-20
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  • Received：2022-11-10
  • Revised：2023-01-21
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    Lishui Liandu Power Supply Company of State Grid Zhejiang Electric Power Co., Ltd., Lishui 323000, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.10.012
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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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