摘要
中国高电压等级交流电缆用交联聚乙烯(XPLE)绝缘料研发较晚,目前国产220 kV电压等级绝缘料暂未获得工程应用。以3种国内外高压电缆XLPE绝缘料为研究对象,对比分析绝缘料热压试样的工频击穿场强、介电常数、介质损耗正切、熔融和结晶性能、拉伸强度、断裂伸长率、微观形貌和交联度等参数。实验测试结果表明:国产XLPE绝缘料的宏观性能参数已经和进口XLPE绝缘料相差不大,甚至国产绝缘料试样的击穿场强和力学性能参数优于进口X1#试样,但同时也能够发现国产绝缘料的不足之处,例如击穿场强的稳定性较差、介质损耗角正切值偏大等。研究结论可为国产电缆绝缘料的研发与性能提升提供数据支撑。
The crosslinked polyethylene(XPLE)insulation materials for HVAC cables are developed relatively late in China.At present,the domestic-made insulation materials for 220 kV voltage grade have not been applied in practical engineering.Based on three types of domestic and foreign made XPLE insulation materials used for HVAC cables,a comparative experimental study is made on their power frequency breakdown strength,dielectric constant,dielectric loss tangent,melting and crystallization properties,tensile properties,elongation at break,micro-morphology and crosslinking degree.The experimental results show that the domestic made XLPE insulation materials are not much different from imported ones in macro performance parameters,with the domesticmade insulation material samples even being better than the imported X1#samples in breakdown characteristics and mechanical properties.However,some shortcomings are also found for domestic-made insulation materials,such as poor stability of breakdown strength and large value of dielectric loss tangent.The results of this study can provide a data support for the development and performance improvement of domestic-made cable insulation materials.
作者
欧阳本红
刘松华
王诗航
李建英
李盛涛
OUYANG Benhong;LIU Songhua;WANG Shihang;LI Jianying;LI Shengtao(China Electric Power Research Institute,Wuhan 430074,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《中国电力》
CSCD
北大核心
2021年第4期87-93,共7页
Electric Power
基金
国家电网公司科技项目(高压交联聚乙烯电缆绝缘料和屏蔽料国产化关键技术研究及应用,GY71-16-036)。
关键词
高压电缆
交联聚乙烯
绝缘性能
high voltage cable
crosslinked polyethylene
insulation performance
