±1100kV线路光纤复合绝缘子的电场仿真与优化设计

摘要

According to the pollution withstand voltage algorithm, this paper proposed a kind of plan for ±1100 kV DC rod suspension com-posite insulator external insulation design. The simulation model based on ifnite element method was built for rod suspension composite insulator to determine structural parameters of composite insulator grading ring. Simulation result shows that the grading ring design meets the requirements of every part electrical ifeld strength all bellow electric halo starting electric ifeld strength, which effectively improves composite insulator electric potential, electric ifeld distribution, without electric halo generated in grading ring surface.%根据污耐压法提出了±1100 kV直流棒形悬式复合绝缘子外绝缘设计的一种方案，并基于有限元法建立了棒形悬式复合绝缘子的仿真模型，确定了复合绝缘子均压环的结构参数。仿真结果表明，该均压环设计满足各部分电场强度均低于电晕起始电场强度的要求，有效地改善了复合绝缘子电位、电场分布，且均压环表面不会产生电晕。