高压直流绝缘子积污特性数值模拟与预测

发布时间：2018-10-09 19:17

【摘要】：为探讨高压直流线路复合绝缘子在不同环境下的积污特性,建立了基于流体力学原理的高压直流绝缘子积污仿真模型。通过自然积污试验验证了仿真模型的可行性,根据仿真数据建立了基于神经网络算法的粒子撞击率预测模型,使模型更具有实用性。结果表明:雾霾环境下,风速低时电场力作用明显,风速大于1 m/s时电场力影响较小;大风环境下,粒径小于80μm时风速对上表面积污影响不大,粒径大于80μm时上表面粒子撞击率随风速的增大而减小,下表面粒子撞击率几乎为0,粒径对整体粒子撞击率的影响比风速大;风向不水平时,气流向上使下表面粒子撞击率增加,气流向下使上表面粒子撞击率增加。研究成果可用于高压直流绝缘子积污机理研究,并为外绝缘设计及线路运行维护提供依据。
[Abstract]:In order to study the fouling characteristics of HVDC composite insulators in different environments, a hydrodynamic simulation model of HVDC insulators is established. The feasibility of the simulation model is verified by natural fouling test. According to the simulation data, the prediction model of particle impact rate based on neural network algorithm is established, which makes the model more practical. The results show that the effect of electric field force is obvious when the wind speed is low in haze environment, the effect of electric field force is small when the wind speed is greater than 1 m / s, and the influence of wind speed on the surface area pollution is not obvious when the particle size is less than 80 渭 m in the strong wind environment. When the particle size is larger than 80 渭 m, the particle impact rate of the upper surface decreases with the increase of wind speed, and the impact rate of the particle on the lower surface is almost zero, the influence of particle size on the impact rate of the whole particle is greater than that of the wind speed, and the impact rate of the lower surface particle increases when the wind direction is not horizontal. The airflow downward increases the particle impact rate on the upper surface. The results can be used to study the fouling mechanism of HVDC insulators and provide basis for external insulation design and line operation and maintenance.
【作者单位】：山东省特高压输变电技术与装备重点实验室(山东大学电气工程学院);国网江苏省电力公司电力科学研究院;国网山东省电力公司潍坊供电公司;
【基金】：国家电网公司科技项目(SGTYHT/15 JS 193)~~
【分类号】：TM216;TM75

【相似文献】