【摘要】 我国雾霾多发地区也是输电走廊和用电负荷高密度地区,而长期暴露在雾霾天气下的架空输电线路的安全运行受雾霾天气影响。在直流输电线路周围离子流场的作用下,雾霾颗粒会荷电化,荷电后的雾霾颗粒将影响输电导线周围的空间电场分布。本文首先分析雾霾天气对直流输电线路离子流场的影响机理,给出雾霾天气下的直流输电线路离子流场控制方程及计算方法,然后计算不同污染程度雾霾天气下的直流输电线路离子流场,最后分析雾霾天气对离子流场的影响因素。计算结果表明:在雾霾天气下,地面合成场强和离子流密度的分布趋势和正常天气条件下的相同,但幅值增加;雾霾天气对地面合成场强的影响更大;地面合成场强的幅值随着污染程度的增加而增大;雾霾天气下地面合成场强和离子流密度分布增大的主要原因是电晕程度增加。更多还原

【Abstract】 The haze-prone areas are usually the places with limited transmission line corridors and large power loads. The performance of overhead transmission lines is under threat of the haze. The haze particulates around the DC transmission lines will be charged due to the ionized field, and the charged haze particulates will affect the electric field in the vicinity of the HVDC transmission lines. Based on the charging process of haze particulates and influence mechanism of haze on ionized field, this paper proposes the governing equation and calculation method of ionized field in presence of haze. Then the distributions of ionized field under different pollution levels are calculated, and the influence factors of ionized field under haze weather are analyzed. The results show that under the haze weather, the distribution trends of total electric field and ion current on the ground level are same as those under the normal weather, but the magnitudes are greater. Moreover, under the haze weather, the influence of haze on total electric field is greater, and the total electric field of the ground level increases with increasing pollution level, where the increasing degree of corona is the main reason.更多还原