绝缘子污秽闪络的研究现状及思索

绝缘子污秽闪络严重威胁着高压电网的可靠性。论述了人工污秽试验、污闪机理、污闪特征检测以及污闪模型建立等方面的研究现状,认为人工试验主要存在指标和污闪间的关系、电源配置及污秽模拟和运行现场的差异等问题。从工程的角度概括对比了可以有效用于污闪检测和风险预测的几种方法:距离判别法、模糊分类法、极值风险预测法及聚类分析法。指出解决污闪问题的关键是建立科学有效的污闪预测机制,基于模糊理论的信息融合法在污闪检测和风险预测上值得深入研究,而污闪模型研究就工程来讲,意义不大,并提出了未来防污闪工作的建议。

Present Status and Future Prospects for Flashover Research of Contaminated Insulators

Flashover of contaminated insulators,imperiling the reliability of high voltage power system severely,has been the hot point for researchers in high voltage and insulation field.In this paper,present status and problems such as artificial pollution test,mechanism studying,character detecting,and modeling in the research of flashover was summarized and compared.It is considered that the main problems existing in pollution test are correlation between test parameters and flashover values and difference of test power source from that of service site.Some kinds of methods that can be used for flashover identifying and risk predicting from monitored data was offered,such as distance judgement,fuzzy classification,limiting value risk prediction and information mergence.In the author's opinion,the key to solving the problem is developing effective and proper method for flashover predicting,where the fuzzy logical theory combing more information is worth of studying and flashover modeling hasn't too worthiness.Some suggestion about preventing and predicting flashover in the future were offered in the end of this paper too.