This study proposes a technique that is based on the hypothesis that distinct PD sources have unique PD waveform characteristics at the point of measurement. Two different forms of PD pulses are injected into a model transformer winding at different points and by using wideband radio frequency current transformers (RFCTs), measurement data are obtained by positioning the RFCTs at the neutral-to-earth point of the winding and the bushing tap-point-to-earth. Mathematical morphology energy analysis using ordering points to identify clustering structure and signal cross correlation methods are utilized to extract information from the raw measurement data. Assessment of the relative performance of the analytical methods are examined and characterized in this study. The proposed approach allows automatic separation of PD data by source and localization of source site within the winding.

中文翻译：

---

变压器绕组内的局部放电识别和定位

本研究提出了一种技术，该技术基于不同 PD 源在测量点具有独特的 PD 波形特征这一假设。两种不同形式的局部放电脉冲在不同点注入模型变压器绕组，通过使用宽带射频电流互感器 (RFCT)，通过将 RFCT 定位在绕组和套管的中性点对地点获得测量数据点对地。使用排序点识别聚类结构的数学形态能量分析和信号互相关方法用于从原始测量数据中提取信息。本研究对分析方法的相对性能进行了评估和表征。