摘要
通过对北京地区的多根退役110 kV及220 kV交联聚乙烯电缆绝缘层进行差示扫描量热、热失重和傅里叶红外光谱等分析,研究了绝缘材料的聚集态结构及热稳定性。结果表明:电缆带电运行使XLPE的熔程变宽,带电运行的时间与材料的结晶度没有明显的关系。热失重和傅里叶红外光谱结果反映出退役XLPE电缆中只有少数试样发生了一定程度的热氧老化,大多数电缆绝缘层没有发生明显的热氧老化。
The aggregation structure and thermal stability of the insulating materials from 110 kV and 220 kV XLPE cables out of service in Beijing were studied by differential scanning calorimetry（DSC）, ther-mo-gravimetric analysis（TGA） and Fourier transform infrared spectroscopy（FT-IR）. The results show that the melting range of the XLPE broadens if the cables are in live operation, and there are no obvious re-lationships between the operating time and crystallinity of the materials. The results of TGA and FT-IR indicate that only few samples exist certain extent of thermal oxidative aging, and most samples show no obvious thermal oxidative aging.
出处
《绝缘材料》
CAS
北大核心
2013年第1期40-44,48,共6页
Insulating Materials
关键词
交联聚乙烯
聚集态结构
差示扫描量热法
热重法
红外法
XLPE
aggregation structure
differential scanning calorimetry
thermo-gravimetric analysis
Fourier transform infrared spectroscopy
