摘要
套管故障是引起变压器停运的主要原因之一,已成为目前保证电网的安全运行需亟待解决的问题。由于绝缘纸吸水性远大于绝缘油,研究水分对油纸电容式套管绝缘纸加速热老化过程中相关特性的影响,为其老化状态及受潮情况的评估提供理论依据,将具有重要的实际意义。实验结果表明:老化时间与油浸纸介损在特征区间的积分值符合线性规律,水分同介损在特征区间的积分宽度符合线性规律,说明介损积分值的所体现的信息不仅包含老化程度,还包含固体绝缘水分含量大小的信息,由此计算受潮情况下加速老化因子,并通过绝缘老化状态进行绝缘寿命损失率的计算t_(loss)=(F_(EQM)×t_(EQ))/(100L_p)。
Bushing faults is one of the prime reasons causing transformer faults. It has been one of the problems demanding prompt solution for safe operation of the power grid at present. The hygroscopic property of insulation paper is much larger than dielectric oil, so study the moisture influence on the correlated characteristic of condenser bushing oil-paper insulation system during the thermal aging process. This will provide the theoretical basis of evaluating aging and humidified condition, and will be of great importance and necessity. The results are shown as follow: the integral values of ageing time and dielectric loss at feature region agree with linear rule, and the integral breadth of moisture and dielectric loss at feature region still agree with linear rule, which means that the integral value of dielectric loss is not only containing the information of aging degree, but also moisture content information of solid insulation. And the paper caculates accelerated aging factor and the loss rate of insulation life caused by the aging state based on the equation t_(loss)=(F_(EQM)×t_(EQ))/(100L_p).
出处
《电气技术》
2016年第10期59-64,共6页
Electrical Engineering
基金
南方电网重大科技专项(KJ-2014-170-3)
