不饱和湿度下绝缘子盐密与泄漏电流的关系研究

Research of the Connection Between the Insulator Salt Density and Leakage Current at Unsaturated Humidity

污秽地区的绝缘子脏污极易造成污闪事故,而污闪事故的重合闸率很低,造成大面积、长时间停电,对电网安全稳定运行造成严重威胁。因此,了解和掌握污秽绝缘子随环境变化而出现的导电变化规律,进而采取有效措施保障电网安全运行就显得极其重要。鉴于国内对饱和湿度下绝缘子盐密与泄漏电流的相关研究已经比较成熟并积累了大量经验,所以,此文主要通过试验方法,研究污秽绝缘子在各种不饱和湿度下盐密与泄漏电流之间的关系,为上述措施的实施提供了详实而重要的理论数据。

The insulator pollution in the pollution area is liable to cause pollution flashover accidents,while the reclosing ratio of pollution flashover accidents is very low, causing large-area and long-term power failure and causing serious threats to the safe and stable operation of power grid.Therefore, it is of great importance to learn and master the electric conduction change law of polluted insulator with the environment and then take effective measures to ensure the safe operation of power grid.In consideration that the related research of insulator salt density and leakage current at saturated humidity has been mature ,with lots of experience accumulated at home, this paper mainly studies the connection between salt density of polluted insulator and leakage current at various unsaturated humidity with the test method,providing detailed and significant theoretical data for the implementation of the mentioned measures.