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Effect of Beating Degree on Aging Property of Ultrahigh Voltage Insulating Paper
Received:December 28, 2023  
DOI：10.11980/j.issn.0254-508X.2024.04.011
Key Words:insulating paper  beating degree  aging  mechanical properties  electrical properties
Fund Project:生物源纤维制造技术国家重点实验室开放课题（SKL202206）。
Author NameAffiliationPostcode
WANG Nan School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
QIAN Liying School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
YANG Liuqing* State Key Lab of Electrical Insulation and Power Equipment， School of Electrical Engineering， Xi’an Jiaotong University， Xi’an， Shaanxi Province， 710049 710049
ZHAO Chenxuan State Key Lab of Electrical Insulation and Power Equipment， School of Electrical Engineering， Xi’an Jiaotong University， Xi’an， Shaanxi Province， 710049 710049
YU Jiachen State Key Lab of Electrical Insulation and Power Equipment， School of Electrical Engineering， Xi’an Jiaotong University， Xi’an， Shaanxi Province， 710049
State Grid Hunan Extra High Voltage Substation Company， Changsha， Hu’nan Province，410004 		410004
LI Junrong* School of Light Industry and Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
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Abstract:In order to study the effects of beating degree on the aging properties of insulating paper， Russian spruce was taken up sulfate cooking and purification to obtain the insulating pulp. The insulating paper with different beating degree was further prepared. The results showed that with the increase of beating degree， the fiber length and porosity decreased， the content of fine fiber increased， and the fiber splitting and and kink ratio increased. The fiber length decreased significantly after aging， and the content of broken fiber with low beating degree and fine fiber increased. With the aging time prolonging， the performance vaviance of insulating paper with different beating degrees increased. With the extension of aging time， the mechanical and electrical properties of high beating degree insulating paper were reduced less， and the performance was more stable. When the beating degree was increased to 83 °SR， the tensile strength of the insulating paper after hot pressing reached 17.5 kN/m， the fiber polymerization degree could still be maintained above 500 after 30 days of aging， the breakdown strength of oil insulating paper was much higher than that of other oil insulating paper， and the dielectric constant and dielectric loss were lower than those of other oil insulating paper.
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