退役高压交联聚乙烯电缆绝缘结晶特性与热稳定性分析  

Crystallization Property and Thermal Stability Analysis of High Voltage XLPE Cables Out of Service

作　　者：任志刚[1] 罗潘[2] 徐阳[2] 叶宽[1] 冯义[1] 徐曼[2] 李华春[1] 任文娥[2] 王立[3] 

机构地区：[1]北京电力科学研究院,北京100075 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049 [3]天津大学,天津300072

出　　处：《绝缘材料》2013年第1期40-44,48,共6页Insulating Materials

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.

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 

分 类 号：TM201.44[一般工业技术—材料科学与工程] TM206[电气工程—电工理论与新技术]