典型缺陷下绝缘纸板局部放电Q-u及n-u迟滞曲线性能差异分析

Performance Difference Analysis of Partial Discharge Q -u andn-u Hysteresis Curves of Insulating Paper under Typical Defects

介绍了三个不同厂家的绝缘纸板受潮特性等典型缺陷下绝缘纸板局部放电的Q-u、n-u迟滞曲线性能差异分析,对选用绝缘材料提供可行的建议,结果表明针-板模型放电量与柱-板模型放电量在Q-u迟滞曲线中差异不大,在n-u迟滞曲线特性中显示柱-板和针-板放电随电压变化,放电次数呈现相反变化规律,针-板模型放电次数远小于柱板模型。

This paper introduces the performance difference analysis of n-u and q-u hysteresis curves of partial discharge of insulating paperboard under typical defects such as moisture characteristics of insulating paperboard from three different manufacturers,and provides feasible suggestions for the selection of insulating materials.The results show that there is no significant difference in Q-u hysteresis curve between the needleboard model and the column-board model.The characteristics of n-u hysteresis curve show that the cylinder-board and needle-board discharges change with voltage,and the discharge times of the needle-board model are much smaller than those of the column-board model.