绝缘子表面污层位置对流注放电的影响

发布时间：2019-02-28 15:35

【摘要】：为研究流注的产生和传播对污闪过程的影响因素,利用3电极结构,通过光电倍增管得到的光脉冲信号来检测流注在极板间的传播过程,得到了流注的传播概率曲线和传播速度。通过比较测量结果,对绝缘子表面不同位置涂覆污秽层时的传播特性进行研究。研究表明:污秽带的位置对流注的稳定传播电场影响很大,污秽带涂覆在绝缘子表面上、中、下3个位置时,流注放电的稳定传播电场分别为503、598、646 kV/m;外加电场相同时,流注的传播速度随着污秽带向下移动而不断减小。仿真计算的结果表明:污秽带涂覆不同位置时绝缘子表面电场分布畸变很明显,污秽带位置不同,电场畸变也有所不同,在污层区域平均电场有明显减小。污层影响绝缘子表面的电场分布,导致流注传播特性产生变化。
[Abstract]:In order to study the influence factors of the flow generation and propagation on the process of pollution flashover, the optical pulse signal obtained from the photomultiplier tube was used to detect the propagation process of the flow beam between the plates by using the structure of three electrodes. The propagation probability curve and propagation speed of the flow beam are obtained. By comparing the measurement results, the propagation characteristics of insulators coated with filthy layers at different positions were studied. The results show that the position of the polluted zone has a great influence on the steady propagation electric field of the flow beam. The steady propagation electric field of the flux discharge is 503598646 kV/m; when the polluted zone is coated on the surface of the insulator and at the middle and bottom three positions respectively. When the applied electric field is the same, the velocity of the flow beam decreases with the downward movement of the filth zone. The simulation results show that the electric field distortion on the insulator surface is very obvious when the contamination zone is coated at different positions, and the electric field distortion is different with the contamination zone position, and the average electric field decreases obviously in the contamination zone. The contamination layer affects the electric field distribution on the insulator surface, which leads to the change of the flow propagation characteristics.
【作者单位】：清华大学深圳研究生院;中国电力科学研究院;
【基金】：国家重点基础研究发展计划(973计划)(2011CB209406) 国家自然科学基金(50777033,50977048) 电力系统国家重点实验室项目(SKLD11KZ02)~~
【分类号】：TM216

【参考文献】