基于峭度值的超高压输电线路单相故障性质识别OA北大核心CSCDCSTPCD
Kurtosis Values Based Recognition of Single-phase Fault Property for Extra High Voltage Transmission Lines
输电线路单相接地故障单相跳闸后,故障相电压和电流信号较小,信噪比低,不利于故障性质的准确识别.利用谱峭度对信号中的冲击成分十分敏感及抗噪声能力强的特点,提出了基于峭度值的输电线路故障性质识别方法.在瞬时性故障二次电弧阶段,电弧呈现熄灭-重燃-熄灭的反复交替过程,重燃的瞬间电弧电流会突然增大,电弧电压含有较强的冲击成分,故障相电压的峭度值为正值.永久性故障时故障相电压迅速衰减为波形为正弦波的电磁耦合电压,其峭度值为负,而噪声信号峭度值约为0.根据这…查看全部>>
After the breaker cuts off the fault phase line under single-phase grounding fault,the voltage and current signals of fault phase becone smaller with a lower signal-to-noise ratio.As a result,it is difficult to accurately identify the fault property in this case.Spectral kurtosis,which is very sensitive to pulse signal with strong anti-noise performance,is introduced to identify the fault property in this paper.Under transient fault,the secondary arc undergo…查看全部>>
潘志敏;刘琨;梁勇超;罗勋华;黄纯
国网湖南省电力公司检修公司,长沙410004国网湖南省电力公司检修公司,长沙410004国网湖南省电力公司检修公司,长沙410004湖南大学电气与信息工程学院,长沙410082湖南大学电气与信息工程学院,长沙410082
信息技术与安全科学
超高压输电线路自适应重合闸二次电弧,故障性质谱峭度
extra high voltage transmission lineadaptive reclosuresecondary arcfault propertyspectral kurtosis
《电力系统及其自动化学报》 2017 (4)
104-109,6
国家电网公司科技资助项目(5216A313500N)
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