Department of Electrical and Electronic Engineering, Universidad del Norte, Km 5 Vía Puerto Colombia, Barranquilla, Colombia,
Environ Sci Pollut Res Int. 2015 Jul;22(13):9749-58. doi: 10.1007/s11356-015-4153-z. Epub 2015 Jan 31.
Pollution on electrical insulators is one of the greatest causes of failure of substations subjected to high levels of salinity and environmental pollution. Considering leakage current as the main indicator of pollution on insulators, this paper focuses on establishing the effect of the environmental conditions on the risk of failure due to pollution on insulators and determining the significant change in the magnitude of the pollution on the insulators during dry and humid periods. Hierarchical segmentation analysis was used to establish the effect of environmental conditions on the risk of failure due to pollution on insulators. The Kruskal-Wallis test was utilized to determine the significant changes in the magnitude of the pollution due to climate periods. An important result was the discovery that leakage current was more common on insulators during dry periods than humid ones. There was also a higher risk of failure due to pollution during dry periods. During the humid period, various temperatures and wind directions produced a small change in the risk of failure. As a technical result, operators of electrical substations can now identify the cause of an increase in risk of failure due to pollution in the area. The research provides a contribution towards the behaviour of the leakage current under conditions similar to those of the Colombian Caribbean coast and how they affect the risk of failure of the substation due to pollution.
绝缘子上的污染是导致遭受高盐度和环境污染的变电站故障的最大原因之一。考虑到泄漏电流是绝缘子污染的主要指标，本文重点研究了环境条件对因污染导致绝缘子故障风险的影响，并确定了在干燥和潮湿期间绝缘子污染程度的显著变化。分层分割分析用于确定环境条件对因污染导致绝缘子故障风险的影响。Kruskal-Wallis 检验用于确定因气候期导致的污染程度的显著变化。一个重要的结果是发现，泄漏电流在干燥期比在潮湿期更常见于绝缘子上。此外，在干燥期间，因污染而发生故障的风险更高。在潮湿期间，各种温度和风向导致故障风险的微小变化。作为一项技术成果，现在，变电站的操作人员可以识别出因污染而导致风险增加的原因所在。该研究为类似哥伦比亚加勒比海岸地区的泄漏电流行为及其对因污染导致的变电站故障风险的影响提供了贡献。
