Department of Electrical and Electronics Engineering, Universidad del Norte, Km 5 Vía Puerto Colombia, Barranquilla, Colombia,
Environ Sci Pollut Res Int. 2015 Feb;22(4):2526-36. doi: 10.1007/s11356-014-3729-3. Epub 2014 Oct 23.
The contamination of electrical insulators is one of the major contributors to the risk of operation outages in electrical substations, especially in coastal zones with high salinity levels and atmospheric pollution. By using the measurement of leakage-currents, which is one of the main indicators of contamination in insulators, this work seeks to the determine the correlation with climatic variables, such as ambient temperature, relative humidity, solar irradiance, atmospheric pressure and wind speed and direction. The results obtained provide an input to the behaviour of the leakage current under atmospheric conditions that are particular to the Caribbean coast of Colombia. Spearman's rank correlation coefficients and principal component analysis are utilised to determine the significant relationships among the different variables under consideration. The necessary information for the study was obtained via historical databases of both atmospheric variables and the leakage current measured in over a period of 1 year in a 220-kV potential transformer insulator. We identified the influencing factors of temperature, humidity, radiation, wind speed and direction on the magnitude of the leakage current as the most relevant.
绝缘子的污染是导致变电站运行中断的主要因素之一，特别是在高盐度水平和大气污染的沿海地区。本工作通过测量泄漏电流，这是绝缘子污染的主要指标之一，旨在确定其与环境温度、相对湿度、太阳辐射、大气压力和风速风向等气候变量之间的相关性。所得结果为在哥伦比亚加勒比海岸特有的大气条件下泄漏电流的行为提供了输入。本研究利用 Spearman 秩相关系数和主成分分析来确定考虑的不同变量之间的显著关系。通过在 220kV 电压互感器绝缘子上测量一年的大气变量和泄漏电流的历史数据库获得了研究所需的信息。我们确定了温度、湿度、辐射、风速和风向对泄漏电流大小的影响因素是最相关的。
