人工模拟自然横风条件下绝缘子快速积污特性

发布时间：2018-03-25 04:22

本文选题：瓷绝缘子　切入点：积污特性　出处：《中国电机工程学报》2017年11期

【摘要】：为研究风对绝缘子积污特性的影响,该文利用直流风洞研究了风速和风向对瓷钟罩绝缘子和瓷双伞绝缘子积污特性的影响,并利用Fluent软件建立了绝缘子三维CFD仿真模型,对其周围的空气流场特性进行了分析。结果表明:空气流场对绝缘子积污状况的影响主要表现在风速和风向两个方面,风速和风向对绝缘子上下表面积污量和积污分布均有影响,风速在2.2~4.5 m/s之间时,绝缘子的上下表面污秽度是逐渐增大的,在风速4.5m/s附近的时候达到峰值。随着风速的继续增大,绝缘子表面的污秽度呈下降趋势,当风速大于6.0m/s左右时,绝缘子上下表面污秽度下降趋于平缓;不同风向对下表面有环形伞棱的绝缘子影响较小,对下表面无伞棱结构的绝缘子影响较大。该文研究成果可为污秽外绝缘的设计优化提供理论依据和数据支持。
[Abstract]:In order to study the influence of wind on the fouling characteristics of insulators, the influence of wind speed and wind direction on the fouling characteristics of porcelain bell cover insulators and porcelain double-umbrella insulators is studied by using direct current wind tunnel, and the three-dimensional CFD simulation model of insulators is established by using Fluent software. The characteristics of air flow field around the insulator are analyzed. The results show that the influence of air flow field on insulator fouling is mainly manifested in two aspects: wind speed and wind direction. Wind speed and wind direction have an effect on the surface area pollution quantity and fouling distribution of the insulator. When the wind speed is between 2.2 and 4.5 m / s, the pollution degree of the upper and lower surface of the insulator increases gradually and reaches its peak value near the wind speed 4.5m/s. The pollution degree on the surface of insulator tends to decrease, when the wind speed is higher than 6.0m/s, the decrease of pollution on the upper and lower surface of insulator tends to be gentle, and the influence of different wind direction on the insulator with annular umbrella edge on the lower surface is small. The research results in this paper can provide theoretical basis and data support for the design optimization of polluted external insulation.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);电网环境保护国家重点实验室(中国电力科学研究院);电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);
【基金】：国家电网公司特殊条件下输变电设备绝缘技术科技攻关团队项目(GY71-11-053)~~
【分类号】：TM216

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