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66kV电网故障波形分析

Electric Age(2018)

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Abstract
通过一起66 kV电网故障,根据故障录波图,分析在发生单相接地和三相短路故障时电压、电流的波形变化情况,并将不对称的的三相相量(电压、电流)进行分解为对称三相相量,分析对称分量的变化,找出故障时电压、电流变化的特点. 电网由于雷击、短路或发电厂故障等原因,造成电压大幅波动,甚至停电数秒钟的现象时有发生,严重时会损坏设备,造成事故.本文通过分析66 kV电网单相接地故障和三相短路故障波形,提出故障时电压、电流变化特点.
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