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摘要
The uneven electric field distribution inside insulation element is a critical issue affecting the insulation performance of high-voltage insulation equipment. In this paper，the preparation of adaptive dielectric functional gradient materials using electrophoretic self-assembly is studied and a kind of using electricity to control electricity gradient insulation element fabrication method is proposed. The five stages of one-dimensional filler self-assembly and the equivalent dielectric constant under different states are studied through finite element simulation. The results show that the closer one-dimensional filler particles tends to the electric field direction，the larger the internal electric displacement modulus，and the larger the macroscopic equivalent dielectric constant. At the same time，a spatiotem-poral evolution model of the dielectric constant of liquid pre-polymer composite insulation parts in a non-uniform electric field is established，and the simulation results of needle-plate electrodes are analyzed. It is found by the study that the in-situ auxiliary electric field can effectively mitigate local electric fields and improve overall electric field uniformity. The higher the compatibility coefficient is，the higher the optimal electric field uniformity. However，it can lead to the increase of the dielectric loss rate and the decrease of the marginal effect of homogenization. ? 2023 Xi'an High Voltage Apparatus Research Institute.
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