南方电网沿海绝缘子积污成分与海洋盐雾及附近污染源的关联性

The Correlation Between the Pollution Components of Coastal Insulators in the CSG and the Salt Fog and the Nearby Pollution Sources

沿海地区的输电线路绝缘子会受到盐雾等沿海地区特有的气象条件影响,其表面积污特性与积污成分与内陆地区有明显差异,从而对其闪络电压会有显著影响。为了研究输电线路绝缘子积污成分受海洋盐雾的影响,了解海洋盐雾浓度由于离海岸的距离不同时绝缘子污秽成分的变化规律,对南网沿海多地的输电线路绝缘子的表面污秽进行了采样,利用离子色谱仪与质谱仪检测了样品的阴阳离子等成分,分析了污秽数据与海边距离及附近污染源的相关性。结果表明,绝缘子表面污秽与海洋盐雾具有显著的相关性。当距离海岸越远,海洋盐雾的盐度越低,绝缘子污秽中的阴阳离子含量越少,其中一价离子的摩尔分数以近似指数形式下降;当距离达到10公里左右时,其下降幅度达50%;另一方面,二价离子的摩尔分数会相应的有所上升;再有,绝缘子附近污染源甚至地貌也对其污秽成分具有直接的影响。

Insulators of coastal area are frequently influenced by salt fog weather,and the surface area pollution characteristics and the pollution components are significantly different from the inland areas.Pollution Component has a significant impact on its flashover voltage. In order to study the influence of the marine salt spray on the insulation components of the transmission line insulators,and to understand the variation of the pollution concentration of the insulators due to the different distances from the coast,the surface contamination of the transmission line insulators in the CGS coastal areas was sampled. The ion and cation components of the sample were detected by ion chromatograph and mass spectrometer,and the correlation between the pollution data and the seaside distance and nearby pollution sources was analyzed. The outcome shows that： There is a significant correlation between insulator surface contamination and marine salt spray. The farther away from the coast,the lower the salinity of the marine salt spray,the less the anion and cation content in the insulator contamination,in which the mole fraction of monovalent ions decreases in an approximate exponential form; when the distance reaches about 10 km,the decrease is reached. 50%; on the other hand,the mole fraction of divalent ions will increase accordingly; in addition,the source of pollution near the insulator and even the topography also have a direct impact on its pollution components.