摘要
为了依靠绝缘材料在电场下的颜色变化判断电力设备带电状态,制备了等规/无规聚(3-己基噻吩)(poly(3-hexylthiophene),P3HT)共混薄膜。研究发现,等规P3HT纳米微晶在共混薄膜顶部均匀分布。随无规P3HT含量的上升,共混薄膜沿厚度方向表现出更好的绝缘性能。在无规P3HT含量为95%时,共混薄膜的工频介电常数为5.86,电阻率为3.2 TΩ·cm,直流击穿场强达到113 kV/mm。通过空间电荷积累光谱发现,当电场强度大于40 kV/mm时,电荷主要积累在绝缘的无规P3HT中,且共混薄膜吸收光谱450 nm处峰强度随电场强度的增加而升高,实现了空间电荷驱动的绝缘体系电致变色,为电力设备绝缘带电状态检测提供了新方法。
In order to identify the charged states of power equipment through electrochromism of insulating materials,a regular/irregular poly(3-hexylthiophene)(reg-P3HT/irreg-P3HT)blend film is prepared.The experiment study shows that the reg-P3HT is evenly distributed as nano-scale crystallite morphology on top of the blend film.As the content of irreg-P3HT increases,the blend film shows better insulating performance in the direction of film thickness.When the content of irreg-P3HT reaches 95%,the blend film has a power frequency dielectric constant of 5.86,a volume resistivity of 3.2×10^(12)Ω·cm,and a DC breakdown strength of 113 kV/mm.By applying charge accumulation spectroscopy,it is found that when the field strength reaches over 40 kV/mm,the space charges mainly accumulate in irreg-P3HT,and the blend film’s absorption intensity increases with the field strength at 450 nm,triggering the electrochromism of the insulating film.This work provides a new path for testing the charged states of insulating materials of power equipment.
作者
聂永杰
景钰
张萌
陈昊鹏
赵现平
赵腾飞
项恩新
王科
鲁广昊
朱远惟
NIE Yongjie;JING Yu;ZHANG Meng;CHEN Haopeng;ZHAO Xianping;ZHAO Tengfei;XIANG Enxin;WANG Ke;LU Guanghao;ZHU Yuanwei(Electric Power Research Institute,Yunnan Power Gird Co.,Ltd.,Kunming 650217,China;Economic and Technological Research Institute of State Grid Shaanxi Electric Power Company,Xi'an 710075,China;State Key Laboratory of Electrical Insulation and Power Equipment and Frontier Institute of Science and Technology,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《中国电力》
CSCD
北大核心
2021年第11期144-152,共9页
Electric Power
基金
中国南方电网科技项目(YNKJXM20190717)
国家自然科学基金青年基金资助项目(51907148)。