摘要
针对现有的交流电弧故障检测方法易受某些负载特别是非线性负载的干扰问题,为提高配电线路串、并联电弧故障在线监测的可靠性,依托自主设计的串、并联电弧故障模拟试验装置获取数据并加以分析,本文提出了一种基于信号间谐波特征值的交流电弧故障检测方法.通过该试验装置采集了五类典型负载正常工作和电弧故障两种状态下的电压和电流信号,对滤波后的信号计算其间谐波组的特征值,并对特征值做了进一步的修正,最终给出了阈值区间.该方法检测不同种类的负载可设定统一的判定阈值,且计算量不大,便于实现在线监测.试验数据表明,本方法可有效识别多种负载条件下产生的串、并联电弧故障.
Conventional AC arc faults detection methods susceptible to the interference of certain load especially nonlin- ear load. To improve the reliability of on-line detection of series and parallel arc fault in the low voltage distribution circuit with the data obtained from the arc faults simulation test devices, a method based on the characteristic values ofinterhar- monic for the detection of AC arc faults is presented. By this test device, both voltage and current signals of normal op- eration and arc faults from five kinds of typical loads are captured. The characteristic values of interharmonic group are calculated by the filtered signals. Those values are modified and the threshold range is given in the end. This method can be set uniform determination threshold when detecting different types of loads with little calculation which facilitate on- line detection. Experimental data showed that this method can effectively identification both series and parallel arc faults under many load conditions.
出处
《河北工业大学学报》
CAS
2016年第1期5-12,共8页
Journal of Hebei University of Technology
基金
河北省自然科学基金青年基金(E2015202143)
河北省教育厅青年基金(QN2014148)
