Abstract Obtaining accurate and real-time information about the current traveling wave generated during a faulty condition in an overhead transmission line is always considered as a puzzling task. For overhead transmission networks, current transformers and other sensing devices are mostly mounted in substations. In order to provide a flexible, convenient and easy to install scheme, this paper proposed a real-time, wireless and contactless current traveling wave measurement and fault detection method for overhead transmission lines based on tunnel Magnetoresistive sensor array. By detecting the magnetic flux density generated by current traveling waves in the individual conductors due to disturbances, the current traveling waves produced by the overhead transmission lines is estimated from the detected magnetic flux density. The simulation results include a comparison of the current traveling waves measured by the conventional CT, commercial AC current probe and the current traveling waves estimated using the method proposed in this paper. The proposed method exhibited an effective and accurate results for the measurement of overhead transmission line current traveling waves. Moreover, the proposed method is validated by a reduced-scale laboratory experiment.

中文翻译：

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基于隧道磁阻传感器的架空输电线路故障检测实时非接触式初始电流行波测量

摘要 获取有关架空输电线路故障期间产生的电流行波的准确和实时信息一直被认为是一项令人费解的任务。对于架空输电网络，电流互感器和其他传感设备大多安装在变电站中。为了提供一种灵活、方便、易于安装的方案，提出了一种基于隧道磁阻传感器阵列的架空输电线路实时、无线、非接触式电流行波测量与故障检测方法。通过检测由扰动引起的单个导体中的电流行波产生的磁通密度，根据检测到的磁通密度估计架空输电线路产生的电流行波。仿真结果包括对传统 CT、商用交流电流探头测量的电流行波与使用本文提出的方法估计的电流行波的比较。所提出的方法对架空输电线路电流行波的测量显示出有效和准确的结果。此外，所提出的方法通过缩小规模的实验室实验进行了验证。