磁性导电纳米粒子可以提高变压器油的导热和绝缘特性,但其分散性极易受到磁场的影响,不利于变压器油性能的改善。利用半导体纳米粒子对变压器油进行改性,测量了改性前后变压器油的工频击穿特性、雷电击穿特性和局部放电特性,可知半导体纳米粒子不仅可以使变压器油的工频和雷电击穿电压提高至未改性变压器油的1.2倍,而且可以改善变压器油的局部放电特性。由于现有的电子捕捉理论无法解释这种现象,利用热刺激电流(thermally stimulated current,TSC)法对改性前后变压器油中的陷阱特性进行了测试,结果表明:纳米粒子的加入增加了变压器油中的浅陷阱密度,提高了变压器油对电荷的消散和输运能力,从而能够改善变压器油的绝缘性能。 Magnetic conductive nanoparticles can improve the thermal conductivity and insulation properties of transformer oil, but its dispersion is easily affected by the magnetic field, which is not conducive to the improvement of transformer oil properties. The semiconductor nano-particles were used to modify the transformer oil, and the power frequency breakdown characteristics, lightning breakdown characteristics and partial discharge characteristics of the transformer oil before and after the modification were measured. It can be seen that the semiconductor nano-particles can not only breakdown the power frequency and lightning of the transformer oil Voltage increased to 1.2 times the unmodified transformer oil, but also can improve the partial discharge characteristics of transformer oil. Due to the existing electron capture theory can not explain this phenomenon, the trait characteristics of the transformer oil before and after modification were tested by thermally stimulated current (TSC) method. The results showed that the addition of nano-particles increased the voltage of transformer oil In shallow trap density, improve the transformer oil on the charge dissipation and transport capacity, which can improve the insulating properties of transformer oil.