Real-Time Hotspot Tracing and Model Analysis of a Distributed Optical Fiber Sensor Integrated Power Transformer

With the increasing demand for electricity, overheating has gradually become a common problem power transformers. However, imperfect traditional monitoring method fails to detect whole transformer in real time, which affects safe and economical operation of transformer. This paper was first research utilizing distributed optical fiber sensing system inside running 35 kV realize persistent temperature full region. The detection accuracy designed winding composite sensors also proven feasible actual by temperature-rise tests. hotspots were persistently traced, fluctuating at 83 %~88 %, 84 %~89 85 %~90 % high voltage height phase A, B, C KV three-phase transformer, respectively. Moreover, there are multiple typical models proposed scientists delineate thermodynamic behaviors transformers, hottest-spot (HST) could be visualized precisely through them. In article, construction four (IEC, Swift, Susa, IEEE models) their comparison with HST data from sensor presented, provided scientific basis seeking superior models. According evaluation results, Susa model eventually selected, better describe dynamic thermal (RMSE 3.0776).