Collection of Breakdown and Discharge Research on Advanced Materials

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引用次数: 0

Abstract

Epoxy resins are widely used to build insulators in GIL. Epoxy/AlN nanocomposite can be produced by adding AlN nanoparticals to the epoxy resin. By studying the surface discharge behavior of the nanocomposites under different operating temperature, it is helpful to improve the creeping voltage of epoxy resin. Polypropylene is a kind of material which is usually chosen to build film capacitors. The effects of voltage form on surface charge and discharge behavior were studied. Furthermore, a modification method of a polypropylene film which can suppress surface charge accumulation is proposed. Polypropylene also has great application potential in HVDC cable insulation, provided that its toughness is to be overcome. Different mass fractions of ULDPE and graphene were added to polypropylen to improve mechanical and insulating properties, respectively. Studies on the DC conductivity, space charge behavior, trap level distribution, and breakdown strength of the new material were carried out.
先进材料的击穿与放电研究
环氧树脂在GIL中广泛用于制造绝缘子。通过在环氧树脂中加入AlN纳米颗粒,可以制备环氧/AlN纳米复合材料。研究不同工作温度下纳米复合材料的表面放电行为,有助于提高环氧树脂的蠕变电压。聚丙烯是一种通常被用来制造薄膜电容器的材料。研究了电压形式对表面充放电行为的影响。此外,还提出了一种抑制表面电荷积聚的聚丙烯膜改性方法。聚丙烯在高压直流电缆绝缘中也有很大的应用潜力,但其韧性有待克服。在聚丙烯中加入不同质量分数的ULDPE和石墨烯,分别改善了聚丙烯的机械性能和绝缘性能。研究了新材料的直流电导率、空间电荷行为、陷阱能级分布和击穿强度。
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