基于阻抗计算的电缆早期故障定位方法  

An Incipient Fault Location Method Based on Impedance Calculation

作　　者：刘欣桐 莫付江[1] LIU Xintong;MO Fujiang(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang Jiangsu 212000,China)

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212000

出　　处：《电子器件》2022年第5期1202-1206,共5页Chinese Journal of Electron Devices

摘　　要：早期故障是永久性故障的前兆现象,对早期故障的定位可以有效防止永久性故障,减少故障带来的损失。利用Mary电弧模型模拟早期故障,通过故障电压的马鞍形故障特征提出早期定位算法,由故障电压和中性点电流值计算出故障点。最后通过PSCAD/EMTDC建立10 kV单芯电缆模型,对早期故障定位进行仿真,验证了算法的可靠性。Incipient faults are precursors to permanent faults. The location of incipient faults can effectively prevent permanent faults and reduce the losses caused by faults. Mary arc model is used to simulate incipient fault. According to the saddle fault characteristics of fault voltage, an incipient location algorithm is proposed, and the fault point is calculated from the fault voltage and neutral current. Finally, a 10 kV single-core cable model is built by using PSCAD/EMTDC to verify the reliability of the algorithm.

关 键 词：早期故障 故障定位 电弧模型 单芯电缆 最小二乘法 

分 类 号：TM933[电气工程—电力电子与电力传动]