摘要
以110 kV XLPE高压电缆为研究对象,在高温下对电缆用XLPE绝缘材料进行加速热老化实验,对比研究有氧(空气)与无氧(硅油)环境下其热学和力学性能的变化规律。结果表明:热氧老化过程会加速XLPE绝缘中分子链的裂解,降低熔融温度和结晶度;氧气的存在使得XLPE绝缘的起始分解温度和热分解活化能降低,拉伸强度和断裂伸长率减小。相比于无氧环境的老化试样,热氧老化的试样热学和力学性能劣化更快。
Taking an 110 kV XLPE high-voltage cable as research object, accelerated thermal ageing tests were conducted on the XLPE insulating material at high temperature, and the change laws of their thermal and mechanical properties in aerobic(air) and anaerobic(silicone oil) environment were studied comparatively. The results show that the thermal oxygen ageing process will accelerate the breaking of molecular chains in XLPE insulation and decrease the melting temperature and crystallinity. The presence of oxygen makes the initial decomposition temperature and thermal decomposition activation energy of XLPE insulation decrease, and the tensile strength and elongation at break decrease. Compared with the aged sample in anaerobic environment, the thermal and mechanical properties of the aged sample in aerobic environment deteriorate faster.
作者
何宏明
邱漫诗
聂章翔
李永兰
余欣
张媛媛
金海云
HE Hongming;QIU Manshi;NIE Zhangxiang;LI Yonglan;YU Xin;ZHANG Yuanyuan;JIN Haiyun(Electric Power Research Institute of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《绝缘材料》
CAS
北大核心
2020年第3期22-27,共6页
Insulating Materials
基金
广东电网有限责任公司科技项目资助(GDKJXM20172792)。
关键词
XLPE电缆
高温
空气
硅油介质
热学性能
力学性能
XLPE cable
high temperature
air
silicone oil media
thermal properties
mechanical properties
