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发电机出口电压互感器匝间短路故障分析与计算

更新时间:2020-06-15 04:25:38 大小:895K 上传用户:六3无线电查看TA发布的资源 标签:电压互感器 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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以一起发电机出口电压互感器故障引起定子接地保护动作为例,通过综合分析故障录波波形、试验数据,判断保护动作是由电压互感器一次侧匝间短路引起的。对电压互感器匝间短路引起故障相对地等效阻抗降低,进而引起机端电压不平衡进行等效电路的分析与计算,有助于深入理解匝间短路过程。最后讨论了引起匝间短路的几种可能情况及预防措施,可为发电机出口电压互感器的监控和安全运行提供参考。

Taking a stator grounding fault protection caused by inter-turn short circuit of voltage transformer as an example,the inter-turn short circuit of voltage transformer primary winding is determined to be the cause of the protection action through comprehensive analysis of fault waveform and test data. The analysis and calculation on equivalent circuit of terminal voltage imbalance caused by the equivalent impedance reduction as the voltage transformer inter-turn circuit is shorted are made,which is helpful to understand the process of inter-turn short circuit. Finally,several possible situations and preventive measures leading to inter-turn short circuit are discussed,which can provide reference for the monitoring and safe operation of voltage transformer.

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发电机出口电压互感器匝间短路故障分析与计算.pdf 895K

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