谐振接地系统弧光接地过电压自动抑制方法

Automatic suppression method of arc grounding overvoltage in resonance grounding system

现有的谐振接地系统弧光接地过电压抑制方法,存在着抑制有效性差的问题,为此,对谐振接地系统弧光接地过电压自动抑制进行研究。利用小波分析法提取弧光接地过电压特征量,通过遗传算法识别弧光接地过电压,根据识别结果制定弧光接地过电压抑制措施。通过中性点经消弧线圈接地、中性点经电阻接地以及故障相投接地电阻,实现了谐振接地系统弧光接地过电压的自动抑制。通过测试可知,与现有的接地过电压抑制方法相比,提出的接地过电压自动抑制方法极大地提升了抑制的有效性,充分说明提出的弧光接地过电压自动抑制方法具备更好的抑制效果。

The existing arc grounding overvoltage suppression method of the resonant grounding system has the problem of poor suppression effectiveness.Therefore,the automatic suppression of the arc grounding overvoltage of the resonance grounding system is studied.The wavelet analysis method is used to extract the characteristic value of the arc light ground overvoltage,the genetic algorithm is used to identify the arc light ground overvoltage,and the arc light ground overvoltage suppression measures are formulated based on the recognition results.The neutral point is grounded through the arc suppression coil,the neutral point is grounded through the resistance,and the fault phase-to-ground resistance is used to automatically suppress the arc grounding overvoltage of the resonant ground system.It can be known from the test that compared with the existing ground overvoltage suppression methods,the proposed automatic ground overvoltage suppression method greatly improves the effectiveness of the suppression.It fully demonstrates that the proposed automatic suppression method of arc ground overvoltage has better suppression effect.