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首页> 外文会议>IEEE Innovative Smart Grid Technologies - Asia >Feasibility of magnetic signature-based detection of low and high impedance faults in low-voltage distribution networks
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Feasibility of magnetic signature-based detection of low and high impedance faults in low-voltage distribution networks

机译：在低压配电网中基于磁签名的低阻抗和高阻抗故障检测的可行性

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This article investigates the feasibility of using noncontact magnetic sensor measurements as the basis for the detection of low and high impedance faults in 0.44 kV distribution networks. It is compared with fault detection using current measurement. A harmonic source free power system was simulated in DIgSilent, in which single line to ground faults was staged. Magnetic field intensity was calculated from simulated phase currents and then the potential detection of faults using total harmonic distortion (THD) and Discrete Wavelet Transform (DWT) was assessed. The use of magnetic sensor measurements as the basis for the detection of low and high impedance faults in 0.44 kV distribution networks was shown to be feasible. As with current-based measurements, wavelet analysis was found to be a better method for HIF faults. However, detection schemes proposed for current-based measurements will need to be modified to suit magnetic field measurements as the shape of the magnetic field waveform differs from the current waveform.
机译：本文探讨了使用非接触式磁传感器测量作为检测0.44 kV配电网络中低阻抗和高阻抗故障的基础的可行性。将其与使用电流测量的故障检测进行比较。在DIgSilent中模拟了一种无谐波源的电力系统，其中分级了单线接地故障。从模拟的相电流中计算出磁场强度，然后评估使用总谐波失真（THD）和离散小波变换（DWT）进行故障的电位检测。事实证明，使用磁传感器测量值作为检测0.44 kV配电网络中低阻抗和高阻抗故障的基础是可行的。与基于电流的测量一样，小波分析被认为是解决HIF故障的更好方法。然而，由于磁场波形的形状不同于电流波形，因此需要修改针对基于电流的测量提出的检测方案以适合磁场测量。

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