无机纳米掺杂XLPE电缆绝缘的力学性能与电气强度研究
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摘要
通过自制掺杂纳米Si O_2和纳米炭黑的XLPE绝缘材料,研究了两种无机纳米颗粒对XLPE力学性能与电气强度的影响,测量了试样的拉伸率、断裂伸长率以及热老化前后的击穿电压和耐压时间。结果表明:添加纳米炭黑的XLPE试样具有最好的交联程度,材料韧性增加,而添加纳米Si O_2的XLPE试样的交联程度相对于纯XLPE试样变化不大,韧性减小,刚性增大;两种纳米颗粒的添加均使得XLPE电缆绝缘试样的击穿电压升高,同时耐压时间增加;热老化会降低XLPE绝缘材料的电气强度。
Two XLPE insulation materials doped with nano-Si O_2 and nano-carbon black respectively were prepared, and the effects of two inorganic nanoparticles on their mechanical properties and electric strength were studied. The thermal elongation, elongation at break, and breakdown voltage and withstand voltage time before and after ageing of samples were measured. The results show that the XLPE sample doped with nano-carbon black has the best cross-linking degree, and its toughness increases. While the cross-linking degree of the XLPE sample doped with nano-Si O_2 changes little compare to the pure XLPE sample, the toughness decreases and the stiffness increases. The addition of two inorganic nanoparticles can increase the breakdown voltage and withstand voltage time of XLPE sample. Thermal ageing will reduce the electric strength of XLPE insulation material.
Two XLPE insulation materials doped with nano-Si O_2 and nano-carbon black respectively were prepared, and the effects of two inorganic nanoparticles on their mechanical properties and electric strength were studied. The thermal elongation, elongation at break, and breakdown voltage and withstand voltage time before and after ageing of samples were measured. The results show that the XLPE sample doped with nano-carbon black has the best cross-linking degree, and its toughness increases. While the cross-linking degree of the XLPE sample doped with nano-Si O_2 changes little compare to the pure XLPE sample, the toughness decreases and the stiffness increases. The addition of two inorganic nanoparticles can increase the breakdown voltage and withstand voltage time of XLPE sample. Thermal ageing will reduce the electric strength of XLPE insulation material.
引文
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[11]陈曦,吴锴,王霞,等.纳米粒子改性聚乙烯直流电缆绝缘材料研究[J].高电压技术,2012,38(10):2691-2697.
[12]徐俊,王晓东,欧阳本红,等.热老化对交联聚乙烯电缆绝缘理化结构的影响[J].绝缘材料,2013,46(2):33-37.
[13]郭俊豪,吉家稍.浅析交联聚乙烯材料的热延伸实验[J].广东建材,2010,26(6):135-136.
[14]宋红艳,黄兴溢,张军,等.XLPE及XLPE/Mg O纳米复合材料的击穿强度与力学性能的比较研究[J].绝缘材料,2014,47(3):17-21.
[2]CHEN G,HAO M,XU Z,et al.Review of high voltage direct current cables[J].CSEE Journal of Power and Energy Systems,2015,1(2):9-21.
[3]张鹏.交联聚乙烯高压直流电缆绝缘材料中试生产线及工艺优化[D].哈尔滨:哈尔滨理工大学,2015.
[4]LEWIS T J.Nanometric dielectrics[J].IEEE Transactions on Dielectrics and Electrical Insulation,1994,1(5):812-825.
[5]吴建东,尹毅,兰莉,等.纳米填充浓度对LDPE/Silica纳米复合介质中空间电荷行为的影响[J].中国电机工程学报,2012,32(28):177-183.
[6]HAYASE Y,AOYAMA H,TANAKA Y,et al.Space charge formation in LDPE/Mg O nano-composite thin film under ultra-high DC electric stress[J].Transactions of the Institute of Electrical Engineers of Japan,2006,126(11):1084-1089.
[7]DISSADO L A,MAZZANTI G,MONTANARI G C.The role of trapped space charges in the electrical aging of insulating materials[J].IEEE Transactions on Dielectrics and Electrical Insulation,1997,4(5):496-506.
[8]LEWIS T J,LLEWEWLLYAN P A.New model for electrical aging and breakdown in dielectrics[C]//7th International Conference on Dielectric Materials,Measurements and Applications.Bath,UK:IEEE,1996:220-224.
[9]PARPAL J L,CRINE J P,DANG C.Electrical aging of extruded dielectric cables-A physical model[J].IEEE Transactions on Dielectrics and Electrical Insulation,1997,4(2):197-209.
[10]高俊国,张豪,李丽丽,等.交联聚乙烯/蒙脱土纳米复合物空间电荷特性研究[J].高分子学报,2013(1):126-133.
[11]陈曦,吴锴,王霞,等.纳米粒子改性聚乙烯直流电缆绝缘材料研究[J].高电压技术,2012,38(10):2691-2697.
[12]徐俊,王晓东,欧阳本红,等.热老化对交联聚乙烯电缆绝缘理化结构的影响[J].绝缘材料,2013,46(2):33-37.
[13]郭俊豪,吉家稍.浅析交联聚乙烯材料的热延伸实验[J].广东建材,2010,26(6):135-136.
[14]宋红艳,黄兴溢,张军,等.XLPE及XLPE/Mg O纳米复合材料的击穿强度与力学性能的比较研究[J].绝缘材料,2014,47(3):17-21.