青藏铁路供电变压器局部放电在线监测用电流传感器的研究

Study on the Current Transducer for On-line Monitoring Partial Discharge from Large Transformer of the Qinghai-Tibet Railway

研制了一套局部放电在线检测用电流传感器,对其幅频特性和灵敏度进行了分析,并给出了实际测试结果。运用该传感器对青藏铁路供电变压器中典型局部放电进行了检测,获得了放电的“指纹”特征,这可为大型变压器中不同放电源的识别和绝缘诊断提供依据。

A current transducer for on-line monitoring partial discharge from large transformer was studied. The frequency response and sensitivity of the transducer were analyzed and tested. The results are given in this paper. The typical partial discharge from large transformer was measured, and its "finger print" was analyzed. This provides a scientific basis to identify the partial discharge source and for insulation diagnostics.