电网技术2011，Vol.35Issue(1)：122-126,5.
预处理温度对高压直流电缆附件绝缘材料空间电荷的影响
Influence of Pretreating Temperature on Space Charge of Insulation Materials for Cable Accessories Used in HVDC Transmission Projects
摘要
Abstract
Using pulsed electro-acoustic method (PEA),the space charge distribution in the insulating layer made of silicone rubber (SIR) and ethylene propylene diene monomer (EPDM), which are pretreated at different temperatures and used to the cable accessories for HVDC transmission projects,is researched. To analyze the reason leading to different accumulation of space charge, the change of chemical molecular structure of insulating material for cable accessories used in HVDC transmission is researched via tensile property tests and dynamic thermal mechanical analysis (DMA). Results of verification experiments show that after pretreating SIR at the temperature of 150℃, the vulcanization SIR is more adequate and the crosslinking density increases, which makes the space charge in insulating layer decreased. Therefore it is suitable to perform pretreatment of SIR at the temperature of 150℃. After pretreating EPDM at the temperature of 150℃,the depolymerizafion reaction of EPDM is presented and it makes the space charge in insulating layer increased. Therefore it is suitable for EDPM to be pretreated at lower temperature,e.g., 80℃.关键词
预处理温度/高压直流电缆/硅橡胶/三元乙丙橡胶/空间电荷/拉伸性能/动态热机械分析Key words
pretreafing temperature/ cable accessories used in HVDC transmission/ silicone rubber (SIR)/ ethylene propylene diene monomer(EDPM)/ space charge/ tensile property/ dynamic thermal mechanical analysis(PMA)分类
信息技术与安全科学引用本文复制引用
王俏华,顾金,吴建东,尹毅..预处理温度对高压直流电缆附件绝缘材料空间电荷的影响[J].电网技术,2011,35(1):122-126,5.基金项目
国家自然科学基金项目(50677038). （50677038）
