雷电及操作冲击电压下几种典型油纸绝缘缺陷模型局部放电特征图谱的分析与比较

发布时间：2018-06-17 19:02

本文选题：雷电冲击电压 + 操作冲击电压　；参考：《高压电器》2017年11期

【摘要】：在冲击电压试验同时进行局部放电测量,通过分析局部放电量大小,并结合分析放电特征,则可更灵敏地反映被试设备的绝缘故障类型和严重程度,有利于更加准确客观地反映被试品绝缘性能是否满足运行需要。文中首先对冲击电压下典型油纸绝缘电场分布开展了仿真研究,制作了4种典型油纸绝缘缺陷模型。其次采用自积分型罗可夫斯基(Rogowski)线圈型电流传感器测量局部放电高频电流。在雷电及操作冲击电压下对4种典型油纸绝缘缺陷开展了局部放电特征试验研究。试验结果表明:相同绝缘缺陷模型在不同电压波形作用下局部放电波形时域特性明显不同;相同电压波形作用下不同绝缘缺陷局部放电波形时域特征差异明显。这些结果可用于后续建立相应模型的放电特征图谱库,用于不同绝缘故障类型局部放电识别研究。
[Abstract]:The partial discharge is measured simultaneously in impulse voltage test. By analyzing the magnitude of partial discharge and combining with the characteristics of discharge, the insulation fault type and severity of the equipment can be more sensitively reflected. It is beneficial to reflect more accurately and objectively whether the insulation performance of the tested products meets the operational requirements. In this paper, the electric field distribution of typical oil-paper insulation under impulse voltage is simulated, and four typical oil-paper insulation defect models are made. Secondly, a self-integrated Rogowski-coil current sensor is used to measure the high frequency partial discharge current. The partial discharge characteristics of four typical oil-paper insulation defects were studied under lightning and operating impulse voltage. The experimental results show that the time domain characteristics of partial discharge waveforms of the same insulation defect model are obviously different under the action of different voltage waveforms, and the time domain characteristics of different insulation defect partial discharge waveforms are obviously different under the same voltage waveforms. These results can be used to establish the discharge characteristic atlas of the corresponding models and to identify the partial discharge of different insulation fault types.
【作者单位】：中国电力科学研究院;
【分类号】：TM855

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